GPU: Implement the FADD32I shader instruction.

Port #3466 from Citra: Add link to Discord

.travis.yml

@@ -42,3 +42,7 @@ notifications:
   webhooks:
     urls:
       - https://api.yuzu-emu.org/code/travis/notify
+
+cache:
+  directories:
+    - $HOME/.ccache

.travis/linux/build.sh

@@ -1,3 +1,3 @@
 #!/bin/bash -ex
 
-docker run -v $(pwd):/yuzu ubuntu:18.04 /bin/bash /yuzu/.travis/linux/docker.sh
+docker run -e CCACHE_DIR=/ccache -v $HOME/.ccache:/ccache -v $(pwd):/yuzu ubuntu:18.04 /bin/bash /yuzu/.travis/linux/docker.sh

.travis/linux/docker.sh

@@ -1,16 +1,18 @@
 #!/bin/bash -ex
 
 apt-get update
-apt-get install -y build-essential git libqt5opengl5-dev libsdl2-dev libssl-dev python qtbase5-dev wget
-
-# Get a recent version of CMake
-wget https://cmake.org/files/v3.10/cmake-3.10.1-Linux-x86_64.sh
-sh cmake-3.10.1-Linux-x86_64.sh --exclude-subdir --prefix=/ --skip-license
+apt-get install --no-install-recommends -y build-essential git libqt5opengl5-dev libsdl2-dev libssl-dev python qtbase5-dev wget cmake ninja-build ccache
 
 cd /yuzu
 
+export PATH=/usr/lib/ccache:$PATH
+ln -sf /usr/bin/ccache /usr/lib/ccache/cc
+ln -sf /usr/bin/ccache /usr/lib/ccache/c++
 mkdir build && cd build
-cmake .. -DYUZU_BUILD_UNICORN=ON -DCMAKE_BUILD_TYPE=Release
-make -j4
+ccache --show-stats > ccache_before
+cmake .. -DYUZU_BUILD_UNICORN=ON -DCMAKE_BUILD_TYPE=Release -G Ninja
+ninja
+ccache --show-stats > ccache_after
+diff -U100 ccache_before ccache_after || true
 
 ctest -VV -C Release

.travis/macos/build.sh

@@ -7,8 +7,12 @@ export Qt5_DIR=$(brew --prefix)/opt/qt5
 export UNICORNDIR=$(pwd)/externals/unicorn
 
 mkdir build && cd build
+export PATH=/usr/local/opt/ccache/libexec:$PATH
+ccache --show-stats > ccache_before
 cmake --version
 cmake .. -DYUZU_BUILD_UNICORN=ON -DCMAKE_BUILD_TYPE=Release
 make -j4
+ccache --show-stats > ccache_after
+diff -U100 ccache_before ccache_after || true
 
 ctest -VV -C Release

.travis/macos/deps.sh

@@ -1,5 +1,5 @@
 #!/bin/sh -ex
 
 brew update
-brew install dylibbundler p7zip qt5 sdl2
+brew install dylibbundler p7zip qt5 sdl2 ccache
 brew outdated cmake || brew upgrade cmake

CMakeModules/CopyYuzuQt5Deps.cmake

@@ -3,7 +3,9 @@ function(copy_yuzu_Qt5_deps target_dir)
     set(DLL_DEST "${CMAKE_BINARY_DIR}/bin/$<CONFIG>/")
     set(Qt5_DLL_DIR "${Qt5_DIR}/../../../bin")
     set(Qt5_PLATFORMS_DIR "${Qt5_DIR}/../../../plugins/platforms/")
+    set(Qt5_STYLES_DIR "${Qt5_DIR}/../../../plugins/styles/")
     set(PLATFORMS ${DLL_DEST}platforms/)
+    set(STYLES ${DLL_DEST}styles/)
     windows_copy_files(${target_dir} ${Qt5_DLL_DIR} ${DLL_DEST}
         icudt*.dll
         icuin*.dll
@@ -14,4 +16,5 @@ function(copy_yuzu_Qt5_deps target_dir)
         Qt5Widgets$<$<CONFIG:Debug>:d>.*
     )
     windows_copy_files(yuzu ${Qt5_PLATFORMS_DIR} ${PLATFORMS} qwindows$<$<CONFIG:Debug>:d>.*)
+    windows_copy_files(yuzu ${Qt5_STYLES_DIR} ${STYLES} qwindowsvistastyle$<$<CONFIG:Debug>:d>.*)
 endfunction(copy_yuzu_Qt5_deps)

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Reporting Issues
 
-**The issue tracker is not a support forum.** Unless you can provide precise *technical information* regarding an issue, you *should not post in it*. If you need support, first read the [FAQ](https://github.com/yuzu-emu/yuzu/wiki/FAQ) and then either visit our Discord server, [our forum](https://community.citra-emu.org) or ask in a general emulation forum such as [/r/emulation](https://www.reddit.com/r/emulation/). If you post support questions, generic messages to the developers or vague reports without technical details, they will be closed and locked.
+**The issue tracker is not a support forum.** Unless you can provide precise *technical information* regarding an issue, you *should not post in it*. If you need support, first read the [FAQ](https://github.com/yuzu-emu/yuzu/wiki/FAQ) and then either visit our [Discord server](https://discordapp.com/invite/u77vRWY), [our forum](https://community.citra-emu.org) or ask in a general emulation forum such as [/r/emulation](https://www.reddit.com/r/emulation/). If you post support questions, generic messages to the developers or vague reports without technical details, they will be closed and locked.
 
 If you believe you have a valid issue report, please post text or a screenshot from the log (the console window that opens alongside yuzu) and build version (hex string visible in the titlebar and zip filename), as well as your hardware and software information if applicable.
 

appveyor.yml

@@ -116,6 +116,7 @@ after_build:
 
           mkdir $RELEASE_DIST
           mkdir $RELEASE_DIST/platforms
+          mkdir $RELEASE_DIST/styles
 
           # copy the compiled binaries and other release files to the release folder
           Get-ChildItem "$CMAKE_BINARY_DIR" -Filter "yuzu*.exe" | Copy-Item -destination $RELEASE_DIST
@@ -136,6 +137,9 @@ after_build:
           # copy the qt windows plugin dll to platforms
           Copy-Item -path "C:/msys64/mingw64/share/qt5/plugins/platforms/qwindows.dll" -force -destination "$RELEASE_DIST/platforms"
 
+          # copy the qt windows vista style dll to platforms
+          Copy-Item -path "C:/msys64/mingw64/share/qt5/plugins/styles/qwindowsvistastyle.dll" -force -destination "$RELEASE_DIST/styles"
+
           7z a -tzip $MINGW_BUILD_ZIP $RELEASE_DIST\*
           7z a $MINGW_SEVENZIP $RELEASE_DIST
         }

src/common/assert.h

@@ -30,15 +30,14 @@ __declspec(noinline, noreturn)
 #define ASSERT(_a_)                                                                                \
     do                                                                                             \
         if (!(_a_)) {                                                                              \
-            assert_noinline_call([] { NGLOG_CRITICAL(Debug, "Assertion Failed!"); });              \
+            assert_noinline_call([] { LOG_CRITICAL(Debug, "Assertion Failed!"); });                \
         }                                                                                          \
     while (0)
 
 #define ASSERT_MSG(_a_, ...)                                                                       \
     do                                                                                             \
         if (!(_a_)) {                                                                              \
-            assert_noinline_call(                                                                  \
-                [&] { NGLOG_CRITICAL(Debug, "Assertion Failed!\n" __VA_ARGS__); });                \
+            assert_noinline_call([&] { LOG_CRITICAL(Debug, "Assertion Failed!\n" __VA_ARGS__); }); \
         }                                                                                          \
     while (0)
 

src/common/common_paths.h

@@ -32,12 +32,15 @@
 #define SDMC_DIR "sdmc"
 #define NAND_DIR "nand"
 #define SYSDATA_DIR "sysdata"
+#define LOG_DIR "log"
 
 // Filenames
 // Files in the directory returned by GetUserPath(D_CONFIG_IDX)
 #define EMU_CONFIG "emu.ini"
 #define DEBUGGER_CONFIG "debugger.ini"
 #define LOGGER_CONFIG "logger.ini"
+// Files in the directory returned by GetUserPath(D_LOGS_IDX)
+#define LOG_FILE "yuzu_log.txt"
 
 // Sys files
 #define SHARED_FONT "shared_font.bin"

src/common/file_util.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <sstream>
 #include "common/assert.h"
 #include "common/common_funcs.h"
 #include "common/common_paths.h"
@@ -118,7 +119,7 @@ bool IsDirectory(const std::string& filename) {
 #endif
 
     if (result < 0) {
-        NGLOG_DEBUG(Common_Filesystem, "stat failed on {}: {}", filename, GetLastErrorMsg());
+        LOG_DEBUG(Common_Filesystem, "stat failed on {}: {}", filename, GetLastErrorMsg());
         return false;
     }
 
@@ -128,29 +129,29 @@ bool IsDirectory(const std::string& filename) {
 // Deletes a given filename, return true on success
 // Doesn't supports deleting a directory
 bool Delete(const std::string& filename) {
-    NGLOG_TRACE(Common_Filesystem, "file {}", filename);
+    LOG_TRACE(Common_Filesystem, "file {}", filename);
 
     // Return true because we care about the file no
     // being there, not the actual delete.
     if (!Exists(filename)) {
-        NGLOG_DEBUG(Common_Filesystem, "{} does not exist", filename);
+        LOG_DEBUG(Common_Filesystem, "{} does not exist", filename);
         return true;
     }
 
     // We can't delete a directory
     if (IsDirectory(filename)) {
-        NGLOG_ERROR(Common_Filesystem, "Failed: {} is a directory", filename);
+        LOG_ERROR(Common_Filesystem, "Failed: {} is a directory", filename);
         return false;
     }
 
 #ifdef _WIN32
     if (!DeleteFileW(Common::UTF8ToUTF16W(filename).c_str())) {
-        NGLOG_ERROR(Common_Filesystem, "DeleteFile failed on {}: {}", filename, GetLastErrorMsg());
+        LOG_ERROR(Common_Filesystem, "DeleteFile failed on {}: {}", filename, GetLastErrorMsg());
         return false;
     }
 #else
     if (unlink(filename.c_str()) == -1) {
-        NGLOG_ERROR(Common_Filesystem, "unlink failed on {}: {}", filename, GetLastErrorMsg());
+        LOG_ERROR(Common_Filesystem, "unlink failed on {}: {}", filename, GetLastErrorMsg());
         return false;
     }
 #endif
@@ -160,16 +161,16 @@ bool Delete(const std::string& filename) {
 
 // Returns true if successful, or path already exists.
 bool CreateDir(const std::string& path) {
-    NGLOG_TRACE(Common_Filesystem, "directory {}", path);
+    LOG_TRACE(Common_Filesystem, "directory {}", path);
 #ifdef _WIN32
     if (::CreateDirectoryW(Common::UTF8ToUTF16W(path).c_str(), nullptr))
         return true;
     DWORD error = GetLastError();
     if (error == ERROR_ALREADY_EXISTS) {
-        NGLOG_DEBUG(Common_Filesystem, "CreateDirectory failed on {}: already exists", path);
+        LOG_DEBUG(Common_Filesystem, "CreateDirectory failed on {}: already exists", path);
         return true;
     }
-    NGLOG_ERROR(Common_Filesystem, "CreateDirectory failed on {}: {}", path, error);
+    LOG_ERROR(Common_Filesystem, "CreateDirectory failed on {}: {}", path, error);
     return false;
 #else
     if (mkdir(path.c_str(), 0755) == 0)
@@ -178,11 +179,11 @@ bool CreateDir(const std::string& path) {
     int err = errno;
 
     if (err == EEXIST) {
-        NGLOG_DEBUG(Common_Filesystem, "mkdir failed on {}: already exists", path);
+        LOG_DEBUG(Common_Filesystem, "mkdir failed on {}: already exists", path);
         return true;
     }
 
-    NGLOG_ERROR(Common_Filesystem, "mkdir failed on {}: {}", path, strerror(err));
+    LOG_ERROR(Common_Filesystem, "mkdir failed on {}: {}", path, strerror(err));
     return false;
 #endif
 }
@@ -190,10 +191,10 @@ bool CreateDir(const std::string& path) {
 // Creates the full path of fullPath returns true on success
 bool CreateFullPath(const std::string& fullPath) {
     int panicCounter = 100;
-    NGLOG_TRACE(Common_Filesystem, "path {}", fullPath);
+    LOG_TRACE(Common_Filesystem, "path {}", fullPath);
 
     if (FileUtil::Exists(fullPath)) {
-        NGLOG_DEBUG(Common_Filesystem, "path exists {}", fullPath);
+        LOG_DEBUG(Common_Filesystem, "path exists {}", fullPath);
         return true;
     }
 
@@ -209,14 +210,14 @@ bool CreateFullPath(const std::string& fullPath) {
         // Include the '/' so the first call is CreateDir("/") rather than CreateDir("")
         std::string const subPath(fullPath.substr(0, position + 1));
         if (!FileUtil::IsDirectory(subPath) && !FileUtil::CreateDir(subPath)) {
-            NGLOG_ERROR(Common, "CreateFullPath: directory creation failed");
+            LOG_ERROR(Common, "CreateFullPath: directory creation failed");
             return false;
         }
 
         // A safety check
         panicCounter--;
         if (panicCounter <= 0) {
-            NGLOG_ERROR(Common, "CreateFullPath: directory structure is too deep");
+            LOG_ERROR(Common, "CreateFullPath: directory structure is too deep");
             return false;
         }
         position++;
@@ -225,11 +226,11 @@ bool CreateFullPath(const std::string& fullPath) {
 
 // Deletes a directory filename, returns true on success
 bool DeleteDir(const std::string& filename) {
-    NGLOG_TRACE(Common_Filesystem, "directory {}", filename);
+    LOG_TRACE(Common_Filesystem, "directory {}", filename);
 
     // check if a directory
     if (!FileUtil::IsDirectory(filename)) {
-        NGLOG_ERROR(Common_Filesystem, "Not a directory {}", filename);
+        LOG_ERROR(Common_Filesystem, "Not a directory {}", filename);
         return false;
     }
 
@@ -240,14 +241,14 @@ bool DeleteDir(const std::string& filename) {
     if (rmdir(filename.c_str()) == 0)
         return true;
 #endif
-    NGLOG_ERROR(Common_Filesystem, "failed {}: {}", filename, GetLastErrorMsg());
+    LOG_ERROR(Common_Filesystem, "failed {}: {}", filename, GetLastErrorMsg());
 
     return false;
 }
 
 // renames file srcFilename to destFilename, returns true on success
 bool Rename(const std::string& srcFilename, const std::string& destFilename) {
-    NGLOG_TRACE(Common_Filesystem, "{} --> {}", srcFilename, destFilename);
+    LOG_TRACE(Common_Filesystem, "{} --> {}", srcFilename, destFilename);
 #ifdef _WIN32
     if (_wrename(Common::UTF8ToUTF16W(srcFilename).c_str(),
                  Common::UTF8ToUTF16W(destFilename).c_str()) == 0)
@@ -256,21 +257,21 @@ bool Rename(const std::string& srcFilename, const std::string& destFilename) {
     if (rename(srcFilename.c_str(), destFilename.c_str()) == 0)
         return true;
 #endif
-    NGLOG_ERROR(Common_Filesystem, "failed {} --> {}: {}", srcFilename, destFilename,
-                GetLastErrorMsg());
+    LOG_ERROR(Common_Filesystem, "failed {} --> {}: {}", srcFilename, destFilename,
+              GetLastErrorMsg());
     return false;
 }
 
 // copies file srcFilename to destFilename, returns true on success
 bool Copy(const std::string& srcFilename, const std::string& destFilename) {
-    NGLOG_TRACE(Common_Filesystem, "{} --> {}", srcFilename, destFilename);
+    LOG_TRACE(Common_Filesystem, "{} --> {}", srcFilename, destFilename);
 #ifdef _WIN32
     if (CopyFileW(Common::UTF8ToUTF16W(srcFilename).c_str(),
                   Common::UTF8ToUTF16W(destFilename).c_str(), FALSE))
         return true;
 
-    NGLOG_ERROR(Common_Filesystem, "failed {} --> {}: {}", srcFilename, destFilename,
-                GetLastErrorMsg());
+    LOG_ERROR(Common_Filesystem, "failed {} --> {}: {}", srcFilename, destFilename,
+              GetLastErrorMsg());
     return false;
 #else
 
@@ -282,8 +283,8 @@ bool Copy(const std::string& srcFilename, const std::string& destFilename) {
     // Open input file
     FILE* input = fopen(srcFilename.c_str(), "rb");
     if (!input) {
-        NGLOG_ERROR(Common_Filesystem, "opening input failed {} --> {}: {}", srcFilename,
-                    destFilename, GetLastErrorMsg());
+        LOG_ERROR(Common_Filesystem, "opening input failed {} --> {}: {}", srcFilename,
+                  destFilename, GetLastErrorMsg());
         return false;
     }
 
@@ -291,8 +292,8 @@ bool Copy(const std::string& srcFilename, const std::string& destFilename) {
     FILE* output = fopen(destFilename.c_str(), "wb");
     if (!output) {
         fclose(input);
-        NGLOG_ERROR(Common_Filesystem, "opening output failed {} --> {}: {}", srcFilename,
-                    destFilename, GetLastErrorMsg());
+        LOG_ERROR(Common_Filesystem, "opening output failed {} --> {}: {}", srcFilename,
+                  destFilename, GetLastErrorMsg());
         return false;
     }
 
@@ -302,8 +303,8 @@ bool Copy(const std::string& srcFilename, const std::string& destFilename) {
         size_t rnum = fread(buffer, sizeof(char), BSIZE, input);
         if (rnum != BSIZE) {
             if (ferror(input) != 0) {
-                NGLOG_ERROR(Common_Filesystem, "failed reading from source, {} --> {}: {}",
-                            srcFilename, destFilename, GetLastErrorMsg());
+                LOG_ERROR(Common_Filesystem, "failed reading from source, {} --> {}: {}",
+                          srcFilename, destFilename, GetLastErrorMsg());
                 goto bail;
             }
         }
@@ -311,8 +312,8 @@ bool Copy(const std::string& srcFilename, const std::string& destFilename) {
         // write output
         size_t wnum = fwrite(buffer, sizeof(char), rnum, output);
         if (wnum != rnum) {
-            NGLOG_ERROR(Common_Filesystem, "failed writing to output, {} --> {}: {}", srcFilename,
-                        destFilename, GetLastErrorMsg());
+            LOG_ERROR(Common_Filesystem, "failed writing to output, {} --> {}: {}", srcFilename,
+                      destFilename, GetLastErrorMsg());
             goto bail;
         }
     }
@@ -332,12 +333,12 @@ bail:
 // Returns the size of filename (64bit)
 u64 GetSize(const std::string& filename) {
     if (!Exists(filename)) {
-        NGLOG_ERROR(Common_Filesystem, "failed {}: No such file", filename);
+        LOG_ERROR(Common_Filesystem, "failed {}: No such file", filename);
         return 0;
     }
 
     if (IsDirectory(filename)) {
-        NGLOG_ERROR(Common_Filesystem, "failed {}: is a directory", filename);
+        LOG_ERROR(Common_Filesystem, "failed {}: is a directory", filename);
         return 0;
     }
 
@@ -348,11 +349,11 @@ u64 GetSize(const std::string& filename) {
     if (stat(filename.c_str(), &buf) == 0)
 #endif
     {
-        NGLOG_TRACE(Common_Filesystem, "{}: {}", filename, buf.st_size);
+        LOG_TRACE(Common_Filesystem, "{}: {}", filename, buf.st_size);
         return buf.st_size;
     }
 
-    NGLOG_ERROR(Common_Filesystem, "Stat failed {}: {}", filename, GetLastErrorMsg());
+    LOG_ERROR(Common_Filesystem, "Stat failed {}: {}", filename, GetLastErrorMsg());
     return 0;
 }
 
@@ -360,7 +361,7 @@ u64 GetSize(const std::string& filename) {
 u64 GetSize(const int fd) {
     struct stat buf;
     if (fstat(fd, &buf) != 0) {
-        NGLOG_ERROR(Common_Filesystem, "GetSize: stat failed {}: {}", fd, GetLastErrorMsg());
+        LOG_ERROR(Common_Filesystem, "GetSize: stat failed {}: {}", fd, GetLastErrorMsg());
         return 0;
     }
     return buf.st_size;
@@ -371,14 +372,12 @@ u64 GetSize(FILE* f) {
     // can't use off_t here because it can be 32-bit
     u64 pos = ftello(f);
     if (fseeko(f, 0, SEEK_END) != 0) {
-        NGLOG_ERROR(Common_Filesystem, "GetSize: seek failed {}: {}", fmt::ptr(f),
-                    GetLastErrorMsg());
+        LOG_ERROR(Common_Filesystem, "GetSize: seek failed {}: {}", fmt::ptr(f), GetLastErrorMsg());
         return 0;
     }
     u64 size = ftello(f);
     if ((size != pos) && (fseeko(f, pos, SEEK_SET) != 0)) {
-        NGLOG_ERROR(Common_Filesystem, "GetSize: seek failed {}: {}", fmt::ptr(f),
-                    GetLastErrorMsg());
+        LOG_ERROR(Common_Filesystem, "GetSize: seek failed {}: {}", fmt::ptr(f), GetLastErrorMsg());
         return 0;
     }
     return size;
@@ -386,10 +385,10 @@ u64 GetSize(FILE* f) {
 
 // creates an empty file filename, returns true on success
 bool CreateEmptyFile(const std::string& filename) {
-    NGLOG_TRACE(Common_Filesystem, "{}", filename);
+    LOG_TRACE(Common_Filesystem, "{}", filename);
 
-    if (!FileUtil::IOFile(filename, "wb")) {
-        NGLOG_ERROR(Common_Filesystem, "failed {}: {}", filename, GetLastErrorMsg());
+    if (!FileUtil::IOFile(filename, "wb").IsOpen()) {
+        LOG_ERROR(Common_Filesystem, "failed {}: {}", filename, GetLastErrorMsg());
         return false;
     }
 
@@ -398,7 +397,7 @@ bool CreateEmptyFile(const std::string& filename) {
 
 bool ForeachDirectoryEntry(unsigned* num_entries_out, const std::string& directory,
                            DirectoryEntryCallable callback) {
-    NGLOG_TRACE(Common_Filesystem, "directory {}", directory);
+    LOG_TRACE(Common_Filesystem, "directory {}", directory);
 
     // How many files + directories we found
     unsigned found_entries = 0;
@@ -556,7 +555,7 @@ std::string GetCurrentDir() {
     char* dir;
     if (!(dir = getcwd(nullptr, 0))) {
 #endif
-        NGLOG_ERROR(Common_Filesystem, "GetCurrentDirectory failed: {}", GetLastErrorMsg());
+        LOG_ERROR(Common_Filesystem, "GetCurrentDirectory failed: {}", GetLastErrorMsg());
         return nullptr;
     }
 #ifdef _WIN32
@@ -676,11 +675,11 @@ std::string GetSysDirectory() {
 #endif
     sysDir += DIR_SEP;
 
-    NGLOG_DEBUG(Common_Filesystem, "Setting to {}:", sysDir);
+    LOG_DEBUG(Common_Filesystem, "Setting to {}:", sysDir);
     return sysDir;
 }
 
-// Returns a string with a Citra data dir or file in the user's home
+// Returns a string with a yuzu data dir or file in the user's home
 // directory. To be used in "multi-user" mode (that is, installed).
 const std::string& GetUserPath(const unsigned int DirIDX, const std::string& newPath) {
     static std::string paths[NUM_PATH_INDICES];
@@ -692,7 +691,7 @@ const std::string& GetUserPath(const unsigned int DirIDX, const std::string& new
         if (!FileUtil::IsDirectory(paths[D_USER_IDX])) {
             paths[D_USER_IDX] = AppDataRoamingDirectory() + DIR_SEP EMU_DATA_DIR DIR_SEP;
         } else {
-            NGLOG_INFO(Common_Filesystem, "Using the local user directory");
+            LOG_INFO(Common_Filesystem, "Using the local user directory");
         }
 
         paths[D_CONFIG_IDX] = paths[D_USER_IDX] + CONFIG_DIR DIR_SEP;
@@ -715,11 +714,13 @@ const std::string& GetUserPath(const unsigned int DirIDX, const std::string& new
         paths[D_SDMC_IDX] = paths[D_USER_IDX] + SDMC_DIR DIR_SEP;
         paths[D_NAND_IDX] = paths[D_USER_IDX] + NAND_DIR DIR_SEP;
         paths[D_SYSDATA_IDX] = paths[D_USER_IDX] + SYSDATA_DIR DIR_SEP;
+        // TODO: Put the logs in a better location for each OS
+        paths[D_LOGS_IDX] = paths[D_USER_IDX] + LOG_DIR DIR_SEP;
     }
 
     if (!newPath.empty()) {
         if (!FileUtil::IsDirectory(newPath)) {
-            NGLOG_ERROR(Common_Filesystem, "Invalid path specified {}", newPath);
+            LOG_ERROR(Common_Filesystem, "Invalid path specified {}", newPath);
             return paths[DirIDX];
         } else {
             paths[DirIDX] = newPath;
@@ -750,7 +751,7 @@ size_t WriteStringToFile(bool text_file, const std::string& str, const char* fil
 size_t ReadFileToString(bool text_file, const char* filename, std::string& str) {
     IOFile file(filename, text_file ? "r" : "rb");
 
-    if (!file)
+    if (!file.IsOpen())
         return false;
 
     str.resize(static_cast<u32>(file.GetSize()));
@@ -799,10 +800,61 @@ void SplitFilename83(const std::string& filename, std::array<char, 9>& short_nam
     }
 }
 
+std::vector<std::string> SplitPathComponents(const std::string& filename) {
+    auto copy(filename);
+    std::replace(copy.begin(), copy.end(), '\\', '/');
+    std::vector<std::string> out;
+
+    std::stringstream stream(filename);
+    std::string item;
+    while (std::getline(stream, item, '/'))
+        out.push_back(std::move(item));
+
+    return out;
+}
+
+std::string GetParentPath(const std::string& path) {
+    auto out = path;
+    const auto name_bck_index = out.find_last_of('\\');
+    const auto name_fwd_index = out.find_last_of('/');
+    size_t name_index;
+    if (name_bck_index == std::string::npos || name_fwd_index == std::string::npos)
+        name_index = std::min<size_t>(name_bck_index, name_fwd_index);
+    else
+        name_index = std::max<size_t>(name_bck_index, name_fwd_index);
+
+    return out.erase(name_index);
+}
+
+std::string GetFilename(std::string path) {
+    std::replace(path.begin(), path.end(), '\\', '/');
+    auto name_index = path.find_last_of('/');
+    if (name_index == std::string::npos)
+        return "";
+    return path.substr(name_index + 1);
+}
+
+std::string GetExtensionFromFilename(const std::string& name) {
+    size_t index = name.find_last_of('.');
+    if (index == std::string::npos)
+        return "";
+
+    return name.substr(index + 1);
+}
+
+std::string RemoveTrailingSlash(const std::string& path) {
+    if (path.empty())
+        return path;
+    if (path.back() == '\\' || path.back() == '/')
+        return path.substr(0, path.size() - 1);
+
+    return path;
+}
+
 IOFile::IOFile() {}
 
-IOFile::IOFile(const std::string& filename, const char openmode[]) {
-    Open(filename, openmode);
+IOFile::IOFile(const std::string& filename, const char openmode[], int flags) {
+    Open(filename, openmode, flags);
 }
 
 IOFile::~IOFile() {
@@ -820,28 +872,31 @@ IOFile& IOFile::operator=(IOFile&& other) noexcept {
 
 void IOFile::Swap(IOFile& other) noexcept {
     std::swap(m_file, other.m_file);
-    std::swap(m_good, other.m_good);
 }
 
-bool IOFile::Open(const std::string& filename, const char openmode[]) {
+bool IOFile::Open(const std::string& filename, const char openmode[], int flags) {
     Close();
 #ifdef _WIN32
-    _wfopen_s(&m_file, Common::UTF8ToUTF16W(filename).c_str(),
-              Common::UTF8ToUTF16W(openmode).c_str());
+    if (flags != 0) {
+        m_file = _wfsopen(Common::UTF8ToUTF16W(filename).c_str(),
+                          Common::UTF8ToUTF16W(openmode).c_str(), flags);
+    } else {
+        _wfopen_s(&m_file, Common::UTF8ToUTF16W(filename).c_str(),
+                  Common::UTF8ToUTF16W(openmode).c_str());
+    }
 #else
     m_file = fopen(filename.c_str(), openmode);
 #endif
 
-    m_good = IsOpen();
-    return m_good;
+    return IsOpen();
 }
 
 bool IOFile::Close() {
     if (!IsOpen() || 0 != std::fclose(m_file))
-        m_good = false;
+        return false;
 
     m_file = nullptr;
-    return m_good;
+    return true;
 }
 
 u64 IOFile::GetSize() const {
@@ -851,11 +906,8 @@ u64 IOFile::GetSize() const {
     return 0;
 }
 
-bool IOFile::Seek(s64 off, int origin) {
-    if (!IsOpen() || 0 != fseeko(m_file, off, origin))
-        m_good = false;
-
-    return m_good;
+bool IOFile::Seek(s64 off, int origin) const {
+    return IsOpen() && 0 == fseeko(m_file, off, origin);
 }
 
 u64 IOFile::Tell() const {
@@ -866,26 +918,20 @@ u64 IOFile::Tell() const {
 }
 
 bool IOFile::Flush() {
-    if (!IsOpen() || 0 != std::fflush(m_file))
-        m_good = false;
-
-    return m_good;
+    return IsOpen() && 0 == std::fflush(m_file);
 }
 
 bool IOFile::Resize(u64 size) {
-    if (!IsOpen() || 0 !=
+    return IsOpen() && 0 ==
 #ifdef _WIN32
-                         // ector: _chsize sucks, not 64-bit safe
-                         // F|RES: changed to _chsize_s. i think it is 64-bit safe
-                         _chsize_s(_fileno(m_file), size)
+                           // ector: _chsize sucks, not 64-bit safe
+                           // F|RES: changed to _chsize_s. i think it is 64-bit safe
+                           _chsize_s(_fileno(m_file), size)
 #else
-                         // TODO: handle 64bit and growing
-                         ftruncate(fileno(m_file), size)
+                           // TODO: handle 64bit and growing
+                           ftruncate(fileno(m_file), size)
 #endif
-    )
-        m_good = false;
-
-    return m_good;
+        ;
 }
 
 } // namespace FileUtil

src/common/file_util.h

@@ -150,13 +150,41 @@ size_t ReadFileToString(bool text_file, const char* filename, std::string& str);
 void SplitFilename83(const std::string& filename, std::array<char, 9>& short_name,
                      std::array<char, 4>& extension);
 
+// Splits the path on '/' or '\' and put the components into a vector
+// i.e. "C:\Users\Yuzu\Documents\save.bin" becomes {"C:", "Users", "Yuzu", "Documents", "save.bin" }
+std::vector<std::string> SplitPathComponents(const std::string& filename);
+
+// Gets all of the text prior to the last '/' or '\' in the path.
+std::string GetParentPath(const std::string& path);
+
+// Gets the filename of the path
+std::string GetFilename(std::string path);
+
+// Gets the extension of the filename
+std::string GetExtensionFromFilename(const std::string& name);
+
+// Removes the final '/' or '\' if one exists
+std::string RemoveTrailingSlash(const std::string& path);
+
+// Creates a new vector containing indices [first, last) from the original.
+template <typename T>
+std::vector<T> SliceVector(const std::vector<T>& vector, size_t first, size_t last) {
+    if (first >= last)
+        return {};
+    last = std::min<size_t>(last, vector.size());
+    return std::vector<T>(vector.begin() + first, vector.begin() + first + last);
+}
+
 // simple wrapper for cstdlib file functions to
 // hopefully will make error checking easier
 // and make forgetting an fclose() harder
 class IOFile : public NonCopyable {
 public:
     IOFile();
-    IOFile(const std::string& filename, const char openmode[]);
+    // flags is used for windows specific file open mode flags, which
+    // allows yuzu to open the logs in shared write mode, so that the file
+    // isn't considered "locked" while yuzu is open and people can open the log file and view it
+    IOFile(const std::string& filename, const char openmode[], int flags = 0);
 
     ~IOFile();
 
@@ -165,45 +193,31 @@ public:
 
     void Swap(IOFile& other) noexcept;
 
-    bool Open(const std::string& filename, const char openmode[]);
+    bool Open(const std::string& filename, const char openmode[], int flags = 0);
     bool Close();
 
     template <typename T>
-    size_t ReadArray(T* data, size_t length) {
+    size_t ReadArray(T* data, size_t length) const {
         static_assert(std::is_trivially_copyable<T>(),
                       "Given array does not consist of trivially copyable objects");
 
-        if (!IsOpen()) {
-            m_good = false;
+        if (!IsOpen())
             return -1;
-        }
 
-        size_t items_read = std::fread(data, sizeof(T), length, m_file);
-        if (items_read != length)
-            m_good = false;
-
-        return items_read;
+        return std::fread(data, sizeof(T), length, m_file);
     }
 
     template <typename T>
     size_t WriteArray(const T* data, size_t length) {
         static_assert(std::is_trivially_copyable<T>(),
                       "Given array does not consist of trivially copyable objects");
-
-        if (!IsOpen()) {
-            m_good = false;
+        if (!IsOpen())
             return -1;
-        }
-
-        size_t items_written = std::fwrite(data, sizeof(T), length, m_file);
-        if (items_written != length)
-            m_good = false;
-
-        return items_written;
+        return std::fwrite(data, sizeof(T), length, m_file);
     }
 
     template <typename T>
-    size_t ReadBytes(T* data, size_t length) {
+    size_t ReadBytes(T* data, size_t length) const {
         static_assert(std::is_trivially_copyable<T>(), "T must be trivially copyable");
         return ReadArray(reinterpret_cast<char*>(data), length);
     }
@@ -220,19 +234,15 @@ public:
         return WriteArray(&object, 1);
     }
 
+    size_t WriteString(const std::string& str) {
+        return WriteArray(str.c_str(), str.length());
+    }
+
     bool IsOpen() const {
         return nullptr != m_file;
     }
 
-    // m_good is set to false when a read, write or other function fails
-    bool IsGood() const {
-        return m_good;
-    }
-    explicit operator bool() const {
-        return IsGood();
-    }
-
-    bool Seek(s64 off, int origin);
+    bool Seek(s64 off, int origin) const;
     u64 Tell() const;
     u64 GetSize() const;
     bool Resize(u64 size);
@@ -240,13 +250,11 @@ public:
 
     // clear error state
     void Clear() {
-        m_good = true;
         std::clearerr(m_file);
     }
 
 private:
     std::FILE* m_file = nullptr;
-    bool m_good = true;
 };
 
 } // namespace FileUtil

src/common/logging/backend.cpp

@@ -2,16 +2,145 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <utility>
+#include <algorithm>
+#include <array>
+#include <chrono>
+#include <condition_variable>
+#include <memory>
+#include <thread>
+#ifdef _WIN32
+#include <share.h> // For _SH_DENYWR
+#else
+#define _SH_DENYWR 0
+#endif
 #include "common/assert.h"
+#include "common/common_funcs.h" // snprintf compatibility define
 #include "common/logging/backend.h"
-#include "common/logging/filter.h"
 #include "common/logging/log.h"
 #include "common/logging/text_formatter.h"
 #include "common/string_util.h"
+#include "common/threadsafe_queue.h"
 
 namespace Log {
 
+/**
+ * Static state as a singleton.
+ */
+class Impl {
+public:
+    static Impl& Instance() {
+        static Impl backend;
+        return backend;
+    }
+
+    Impl(Impl const&) = delete;
+    const Impl& operator=(Impl const&) = delete;
+
+    void PushEntry(Entry e) {
+        std::lock_guard<std::mutex> lock(message_mutex);
+        message_queue.Push(std::move(e));
+        message_cv.notify_one();
+    }
+
+    void AddBackend(std::unique_ptr<Backend> backend) {
+        std::lock_guard<std::mutex> lock(writing_mutex);
+        backends.push_back(std::move(backend));
+    }
+
+    void RemoveBackend(const std::string& backend_name) {
+        std::lock_guard<std::mutex> lock(writing_mutex);
+        auto it = std::remove_if(backends.begin(), backends.end(), [&backend_name](const auto& i) {
+            return !strcmp(i->GetName(), backend_name.c_str());
+        });
+        backends.erase(it, backends.end());
+    }
+
+    const Filter& GetGlobalFilter() const {
+        return filter;
+    }
+
+    void SetGlobalFilter(const Filter& f) {
+        filter = f;
+    }
+
+    Backend* GetBackend(const std::string& backend_name) {
+        auto it = std::find_if(backends.begin(), backends.end(), [&backend_name](const auto& i) {
+            return !strcmp(i->GetName(), backend_name.c_str());
+        });
+        if (it == backends.end())
+            return nullptr;
+        return it->get();
+    }
+
+private:
+    Impl() {
+        backend_thread = std::thread([&] {
+            Entry entry;
+            auto write_logs = [&](Entry& e) {
+                std::lock_guard<std::mutex> lock(writing_mutex);
+                for (const auto& backend : backends) {
+                    backend->Write(e);
+                }
+            };
+            while (true) {
+                std::unique_lock<std::mutex> lock(message_mutex);
+                message_cv.wait(lock, [&] { return !running || message_queue.Pop(entry); });
+                if (!running) {
+                    break;
+                }
+                write_logs(entry);
+            }
+            // Drain the logging queue. Only writes out up to MAX_LOGS_TO_WRITE to prevent a case
+            // where a system is repeatedly spamming logs even on close.
+            constexpr int MAX_LOGS_TO_WRITE = 100;
+            int logs_written = 0;
+            while (logs_written++ < MAX_LOGS_TO_WRITE && message_queue.Pop(entry)) {
+                write_logs(entry);
+            }
+        });
+    }
+
+    ~Impl() {
+        running = false;
+        message_cv.notify_one();
+        backend_thread.join();
+    }
+
+    std::atomic_bool running{true};
+    std::mutex message_mutex, writing_mutex;
+    std::condition_variable message_cv;
+    std::thread backend_thread;
+    std::vector<std::unique_ptr<Backend>> backends;
+    Common::MPSCQueue<Log::Entry> message_queue;
+    Filter filter;
+};
+
+void ConsoleBackend::Write(const Entry& entry) {
+    PrintMessage(entry);
+}
+
+void ColorConsoleBackend::Write(const Entry& entry) {
+    PrintColoredMessage(entry);
+}
+
+// _SH_DENYWR allows read only access to the file for other programs.
+// It is #defined to 0 on other platforms
+FileBackend::FileBackend(const std::string& filename)
+    : file(filename, "w", _SH_DENYWR), bytes_written(0) {}
+
+void FileBackend::Write(const Entry& entry) {
+    // prevent logs from going over the maximum size (in case its spamming and the user doesn't
+    // know)
+    constexpr size_t MAX_BYTES_WRITTEN = 50 * 1024L * 1024L;
+    if (!file.IsOpen() || bytes_written > MAX_BYTES_WRITTEN) {
+        return;
+    }
+    bytes_written += file.WriteString(FormatLogMessage(entry) + '\n');
+    if (entry.log_level >= Level::Error) {
+        file.Flush();
+    }
+}
+
 /// Macro listing all log classes. Code should define CLS and SUB as desired before invoking this.
 #define ALL_LOG_CLASSES()                                                                          \
     CLS(Log)                                                                                       \
@@ -35,11 +164,13 @@ namespace Log {
     SUB(Service, AM)                                                                               \
     SUB(Service, AOC)                                                                              \
     SUB(Service, APM)                                                                              \
+    SUB(Service, BCAT)                                                                             \
     SUB(Service, Fatal)                                                                            \
     SUB(Service, Friend)                                                                           \
     SUB(Service, FS)                                                                               \
     SUB(Service, HID)                                                                              \
     SUB(Service, LM)                                                                               \
+    SUB(Service, MM)                                                                               \
     SUB(Service, NFP)                                                                              \
     SUB(Service, NIFM)                                                                             \
     SUB(Service, NS)                                                                               \
@@ -123,20 +254,32 @@ Entry CreateEntry(Class log_class, Level log_level, const char* filename, unsign
     return entry;
 }
 
-static Filter* filter = nullptr;
+void SetGlobalFilter(const Filter& filter) {
+    Impl::Instance().SetGlobalFilter(filter);
+}
 
-void SetFilter(Filter* new_filter) {
-    filter = new_filter;
+void AddBackend(std::unique_ptr<Backend> backend) {
+    Impl::Instance().AddBackend(std::move(backend));
+}
+
+void RemoveBackend(const std::string& backend_name) {
+    Impl::Instance().RemoveBackend(backend_name);
+}
+
+Backend* GetBackend(const std::string& backend_name) {
+    return Impl::Instance().GetBackend(backend_name);
 }
 
 void FmtLogMessageImpl(Class log_class, Level log_level, const char* filename,
                        unsigned int line_num, const char* function, const char* format,
                        const fmt::format_args& args) {
-    if (filter && !filter->CheckMessage(log_class, log_level))
+    auto filter = Impl::Instance().GetGlobalFilter();
+    if (!filter.CheckMessage(log_class, log_level))
         return;
+
     Entry entry =
         CreateEntry(log_class, log_level, filename, line_num, function, fmt::vformat(format, args));
 
-    PrintColoredMessage(entry);
+    Impl::Instance().PushEntry(std::move(entry));
 }
-} // namespace Log
+} // namespace Log

src/common/logging/backend.h

@@ -1,13 +1,15 @@
 // Copyright 2014 Citra Emulator Project
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
-
 #pragma once
 
 #include <chrono>
 #include <cstdarg>
+#include <memory>
 #include <string>
 #include <utility>
+#include "common/file_util.h"
+#include "common/logging/filter.h"
 #include "common/logging/log.h"
 
 namespace Log {
@@ -34,6 +36,80 @@ struct Entry {
     Entry& operator=(const Entry& o) = default;
 };
 
+/**
+ * Interface for logging backends. As loggers can be created and removed at runtime, this can be
+ * used by a frontend for adding a custom logging backend as needed
+ */
+class Backend {
+public:
+    virtual ~Backend() = default;
+    virtual void SetFilter(const Filter& new_filter) {
+        filter = new_filter;
+    }
+    virtual const char* GetName() const = 0;
+    virtual void Write(const Entry& entry) = 0;
+
+private:
+    Filter filter;
+};
+
+/**
+ * Backend that writes to stderr without any color commands
+ */
+class ConsoleBackend : public Backend {
+public:
+    static const char* Name() {
+        return "console";
+    }
+    const char* GetName() const override {
+        return Name();
+    }
+    void Write(const Entry& entry) override;
+};
+
+/**
+ * Backend that writes to stderr and with color
+ */
+class ColorConsoleBackend : public Backend {
+public:
+    static const char* Name() {
+        return "color_console";
+    }
+
+    const char* GetName() const override {
+        return Name();
+    }
+    void Write(const Entry& entry) override;
+};
+
+/**
+ * Backend that writes to a file passed into the constructor
+ */
+class FileBackend : public Backend {
+public:
+    explicit FileBackend(const std::string& filename);
+
+    static const char* Name() {
+        return "file";
+    }
+
+    const char* GetName() const override {
+        return Name();
+    }
+
+    void Write(const Entry& entry) override;
+
+private:
+    FileUtil::IOFile file;
+    size_t bytes_written;
+};
+
+void AddBackend(std::unique_ptr<Backend> backend);
+
+void RemoveBackend(const std::string& backend_name);
+
+Backend* GetBackend(const std::string& backend_name);
+
 /**
  * Returns the name of the passed log class as a C-string. Subclasses are separated by periods
  * instead of underscores as in the enumeration.
@@ -49,5 +125,10 @@ const char* GetLevelName(Level log_level);
 Entry CreateEntry(Class log_class, Level log_level, const char* filename, unsigned int line_nr,
                   const char* function, std::string message);
 
-void SetFilter(Filter* filter);
-} // namespace Log
+/**
+ * The global filter will prevent any messages from even being processed if they are filtered. Each
+ * backend can have a filter, but if the level is lower than the global filter, the backend will
+ * never get the message
+ */
+void SetGlobalFilter(const Filter& filter);
+} // namespace Log

src/common/logging/filter.cpp

@@ -65,14 +65,14 @@ bool Filter::ParseFilterRule(const std::string::const_iterator begin,
                              const std::string::const_iterator end) {
     auto level_separator = std::find(begin, end, ':');
     if (level_separator == end) {
-        NGLOG_ERROR(Log, "Invalid log filter. Must specify a log level after `:`: %s",
-                    std::string(begin, end).c_str());
+        LOG_ERROR(Log, "Invalid log filter. Must specify a log level after `:`: {}",
+                  std::string(begin, end));
         return false;
     }
 
     const Level level = GetLevelByName(level_separator + 1, end);
     if (level == Level::Count) {
-        NGLOG_ERROR(Log, "Unknown log level in filter: %s", std::string(begin, end).c_str());
+        LOG_ERROR(Log, "Unknown log level in filter: {}", std::string(begin, end));
         return false;
     }
 
@@ -83,7 +83,7 @@ bool Filter::ParseFilterRule(const std::string::const_iterator begin,
 
     const Class log_class = GetClassByName(begin, level_separator);
     if (log_class == Class::Count) {
-        NGLOG_ERROR(Log, "Unknown log class in filter: %s", std::string(begin, end).c_str());
+        LOG_ERROR(Log, "Unknown log class in filter: {}", std::string(begin, end));
         return false;
     }
 

src/common/logging/log.h

@@ -55,11 +55,13 @@ enum class Class : ClassType {
     Service_AOC,       ///< The AOC (AddOn Content) service
     Service_APM,       ///< The APM (Performance) service
     Service_Audio,     ///< The Audio (Audio control) service
+    Service_BCAT,      ///< The BCAT service
     Service_Fatal,     ///< The Fatal service
     Service_Friend,    ///< The friend service
     Service_FS,        ///< The FS (Filesystem) service
     Service_HID,       ///< The HID (Human interface device) service
     Service_LM,        ///< The LM (Logger) service
+    Service_MM,        ///< The MM (Multimedia) service
     Service_NFP,       ///< The NFP service
     Service_NIFM,      ///< The NIFM (Network interface) service
     Service_NS,        ///< The NS services
@@ -107,25 +109,25 @@ void FmtLogMessage(Class log_class, Level log_level, const char* filename, unsig
 } // namespace Log
 
 #ifdef _DEBUG
-#define NGLOG_TRACE(log_class, ...)                                                                \
+#define LOG_TRACE(log_class, ...)                                                                  \
     ::Log::FmtLogMessage(::Log::Class::log_class, ::Log::Level::Trace, __FILE__, __LINE__,         \
                          __func__, __VA_ARGS__)
 #else
-#define NGLOG_TRACE(log_class, fmt, ...) (void(0))
+#define LOG_TRACE(log_class, fmt, ...) (void(0))
 #endif
 
-#define NGLOG_DEBUG(log_class, ...)                                                                \
+#define LOG_DEBUG(log_class, ...)                                                                  \
     ::Log::FmtLogMessage(::Log::Class::log_class, ::Log::Level::Debug, __FILE__, __LINE__,         \
                          __func__, __VA_ARGS__)
-#define NGLOG_INFO(log_class, ...)                                                                 \
+#define LOG_INFO(log_class, ...)                                                                   \
     ::Log::FmtLogMessage(::Log::Class::log_class, ::Log::Level::Info, __FILE__, __LINE__,          \
                          __func__, __VA_ARGS__)
-#define NGLOG_WARNING(log_class, ...)                                                              \
+#define LOG_WARNING(log_class, ...)                                                                \
     ::Log::FmtLogMessage(::Log::Class::log_class, ::Log::Level::Warning, __FILE__, __LINE__,       \
                          __func__, __VA_ARGS__)
-#define NGLOG_ERROR(log_class, ...)                                                                \
+#define LOG_ERROR(log_class, ...)                                                                  \
     ::Log::FmtLogMessage(::Log::Class::log_class, ::Log::Level::Error, __FILE__, __LINE__,         \
                          __func__, __VA_ARGS__)
-#define NGLOG_CRITICAL(log_class, ...)                                                             \
+#define LOG_CRITICAL(log_class, ...)                                                               \
     ::Log::FmtLogMessage(::Log::Class::log_class, ::Log::Level::Critical, __FILE__, __LINE__,      \
                          __func__, __VA_ARGS__)

src/common/memory_util.cpp

@@ -55,7 +55,7 @@ void* AllocateExecutableMemory(size_t size, bool low) {
     if (ptr == MAP_FAILED) {
         ptr = nullptr;
 #endif
-        NGLOG_ERROR(Common_Memory, "Failed to allocate executable memory");
+        LOG_ERROR(Common_Memory, "Failed to allocate executable memory");
     }
 #if !defined(_WIN32) && defined(ARCHITECTURE_X64) && !defined(MAP_32BIT)
     else {
@@ -68,7 +68,7 @@ void* AllocateExecutableMemory(size_t size, bool low) {
 
 #if EMU_ARCH_BITS == 64
     if ((u64)ptr >= 0x80000000 && low == true)
-        NGLOG_ERROR(Common_Memory, "Executable memory ended up above 2GB!");
+        LOG_ERROR(Common_Memory, "Executable memory ended up above 2GB!");
 #endif
 
     return ptr;
@@ -85,7 +85,7 @@ void* AllocateMemoryPages(size_t size) {
 #endif
 
     if (ptr == nullptr)
-        NGLOG_ERROR(Common_Memory, "Failed to allocate raw memory");
+        LOG_ERROR(Common_Memory, "Failed to allocate raw memory");
 
     return ptr;
 }
@@ -99,12 +99,12 @@ void* AllocateAlignedMemory(size_t size, size_t alignment) {
     ptr = memalign(alignment, size);
 #else
     if (posix_memalign(&ptr, alignment, size) != 0)
-        NGLOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
+        LOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
 #endif
 #endif
 
     if (ptr == nullptr)
-        NGLOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
+        LOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
 
     return ptr;
 }
@@ -113,7 +113,7 @@ void FreeMemoryPages(void* ptr, size_t size) {
     if (ptr) {
 #ifdef _WIN32
         if (!VirtualFree(ptr, 0, MEM_RELEASE))
-            NGLOG_ERROR(Common_Memory, "FreeMemoryPages failed!\n{}", GetLastErrorMsg());
+            LOG_ERROR(Common_Memory, "FreeMemoryPages failed!\n{}", GetLastErrorMsg());
 #else
         munmap(ptr, size);
 #endif
@@ -134,7 +134,7 @@ void WriteProtectMemory(void* ptr, size_t size, bool allowExecute) {
 #ifdef _WIN32
     DWORD oldValue;
     if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READ : PAGE_READONLY, &oldValue))
-        NGLOG_ERROR(Common_Memory, "WriteProtectMemory failed!\n{}", GetLastErrorMsg());
+        LOG_ERROR(Common_Memory, "WriteProtectMemory failed!\n{}", GetLastErrorMsg());
 #else
     mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_EXEC) : PROT_READ);
 #endif
@@ -145,7 +145,7 @@ void UnWriteProtectMemory(void* ptr, size_t size, bool allowExecute) {
     DWORD oldValue;
     if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE,
                         &oldValue))
-        NGLOG_ERROR(Common_Memory, "UnWriteProtectMemory failed!\n{}", GetLastErrorMsg());
+        LOG_ERROR(Common_Memory, "UnWriteProtectMemory failed!\n{}", GetLastErrorMsg());
 #else
     mprotect(ptr, size,
              allowExecute ? (PROT_READ | PROT_WRITE | PROT_EXEC) : PROT_WRITE | PROT_READ);

src/common/param_package.cpp

@@ -25,7 +25,7 @@ ParamPackage::ParamPackage(const std::string& serialized) {
         std::vector<std::string> key_value;
         Common::SplitString(pair, KEY_VALUE_SEPARATOR, key_value);
         if (key_value.size() != 2) {
-            NGLOG_ERROR(Common, "invalid key pair {}", pair);
+            LOG_ERROR(Common, "invalid key pair {}", pair);
             continue;
         }
 
@@ -64,7 +64,7 @@ std::string ParamPackage::Serialize() const {
 std::string ParamPackage::Get(const std::string& key, const std::string& default_value) const {
     auto pair = data.find(key);
     if (pair == data.end()) {
-        NGLOG_DEBUG(Common, "key '{}' not found", key);
+        LOG_DEBUG(Common, "key '{}' not found", key);
         return default_value;
     }
 
@@ -74,14 +74,14 @@ std::string ParamPackage::Get(const std::string& key, const std::string& default
 int ParamPackage::Get(const std::string& key, int default_value) const {
     auto pair = data.find(key);
     if (pair == data.end()) {
-        NGLOG_DEBUG(Common, "key '{}' not found", key);
+        LOG_DEBUG(Common, "key '{}' not found", key);
         return default_value;
     }
 
     try {
         return std::stoi(pair->second);
     } catch (const std::logic_error&) {
-        NGLOG_ERROR(Common, "failed to convert {} to int", pair->second);
+        LOG_ERROR(Common, "failed to convert {} to int", pair->second);
         return default_value;
     }
 }
@@ -89,14 +89,14 @@ int ParamPackage::Get(const std::string& key, int default_value) const {
 float ParamPackage::Get(const std::string& key, float default_value) const {
     auto pair = data.find(key);
     if (pair == data.end()) {
-        NGLOG_DEBUG(Common, "key {} not found", key);
+        LOG_DEBUG(Common, "key {} not found", key);
         return default_value;
     }
 
     try {
         return std::stof(pair->second);
     } catch (const std::logic_error&) {
-        NGLOG_ERROR(Common, "failed to convert {} to float", pair->second);
+        LOG_ERROR(Common, "failed to convert {} to float", pair->second);
         return default_value;
     }
 }

src/common/string_util.cpp

@@ -64,6 +64,10 @@ std::string ArrayToString(const u8* data, size_t size, int line_len, bool spaces
     return oss.str();
 }
 
+std::string StringFromBuffer(const std::vector<u8>& data) {
+    return std::string(data.begin(), std::find(data.begin(), data.end(), '\0'));
+}
+
 // Turns "  hej " into "hej". Also handles tabs.
 std::string StripSpaces(const std::string& str) {
     const size_t s = str.find_first_not_of(" \t\r\n");
@@ -277,7 +281,7 @@ static std::string CodeToUTF8(const char* fromcode, const std::basic_string<T>&
 
     iconv_t const conv_desc = iconv_open("UTF-8", fromcode);
     if ((iconv_t)(-1) == conv_desc) {
-        NGLOG_ERROR(Common, "Iconv initialization failure [{}]: {}", fromcode, strerror(errno));
+        LOG_ERROR(Common, "Iconv initialization failure [{}]: {}", fromcode, strerror(errno));
         iconv_close(conv_desc);
         return {};
     }
@@ -306,7 +310,7 @@ static std::string CodeToUTF8(const char* fromcode, const std::basic_string<T>&
                     ++src_buffer;
                 }
             } else {
-                NGLOG_ERROR(Common, "iconv failure [{}]: {}", fromcode, strerror(errno));
+                LOG_ERROR(Common, "iconv failure [{}]: {}", fromcode, strerror(errno));
                 break;
             }
         }
@@ -325,7 +329,7 @@ std::u16string UTF8ToUTF16(const std::string& input) {
 
     iconv_t const conv_desc = iconv_open("UTF-16LE", "UTF-8");
     if ((iconv_t)(-1) == conv_desc) {
-        NGLOG_ERROR(Common, "Iconv initialization failure [UTF-8]: {}", strerror(errno));
+        LOG_ERROR(Common, "Iconv initialization failure [UTF-8]: {}", strerror(errno));
         iconv_close(conv_desc);
         return {};
     }
@@ -354,7 +358,7 @@ std::u16string UTF8ToUTF16(const std::string& input) {
                     ++src_buffer;
                 }
             } else {
-                NGLOG_ERROR(Common, "iconv failure [UTF-8]: {}", strerror(errno));
+                LOG_ERROR(Common, "iconv failure [UTF-8]: {}", strerror(errno));
                 break;
             }
         }

src/common/string_util.h

@@ -21,6 +21,8 @@ std::string ToUpper(std::string str);
 
 std::string ArrayToString(const u8* data, size_t size, int line_len = 20, bool spaces = true);
 
+std::string StringFromBuffer(const std::vector<u8>& data);
+
 std::string StripSpaces(const std::string& s);
 std::string StripQuotes(const std::string& s);
 

src/core/CMakeLists.txt

@@ -8,9 +8,9 @@ add_library(core STATIC
     core_cpu.h
     core_timing.cpp
     core_timing.h
+    file_sys/content_archive.cpp
+    file_sys/content_archive.h
     file_sys/directory.h
-    file_sys/disk_filesystem.cpp
-    file_sys/disk_filesystem.h
     file_sys/errors.h
     file_sys/filesystem.cpp
     file_sys/filesystem.h
@@ -20,15 +20,13 @@ add_library(core STATIC
     file_sys/path_parser.h
     file_sys/program_metadata.cpp
     file_sys/program_metadata.h
-    file_sys/romfs_factory.cpp
-    file_sys/romfs_factory.h
-    file_sys/romfs_filesystem.cpp
-    file_sys/romfs_filesystem.h
-    file_sys/savedata_factory.cpp
-    file_sys/savedata_factory.h
-    file_sys/sdmc_factory.cpp
-    file_sys/sdmc_factory.h
     file_sys/storage.h
+    file_sys/vfs.cpp
+    file_sys/vfs.h
+    file_sys/vfs_offset.cpp
+    file_sys/vfs_offset.h
+    file_sys/vfs_real.cpp
+    file_sys/vfs_real.h
     frontend/emu_window.cpp
     frontend/emu_window.h
     frontend/framebuffer_layout.cpp
@@ -40,6 +38,8 @@ add_library(core STATIC
     hle/config_mem.h
     hle/ipc.h
     hle/ipc_helpers.h
+    hle/kernel/address_arbiter.cpp
+    hle/kernel/address_arbiter.h
     hle/kernel/client_port.cpp
     hle/kernel/client_port.h
     hle/kernel/client_session.cpp
@@ -124,6 +124,12 @@ add_library(core STATIC
     hle/service/audio/audren_u.h
     hle/service/audio/codecctl.cpp
     hle/service/audio/codecctl.h
+    hle/service/audio/hwopus.cpp
+    hle/service/audio/hwopus.h
+    hle/service/bcat/module.cpp
+    hle/service/bcat/module.h
+    hle/service/bcat/bcat.cpp
+    hle/service/bcat/bcat.h
     hle/service/fatal/fatal.cpp
     hle/service/fatal/fatal.h
     hle/service/fatal/fatal_p.cpp
@@ -144,6 +150,8 @@ add_library(core STATIC
     hle/service/hid/hid.h
     hle/service/lm/lm.cpp
     hle/service/lm/lm.h
+    hle/service/mm/mm_u.cpp
+    hle/service/mm/mm_u.h
     hle/service/nifm/nifm.cpp
     hle/service/nifm/nifm.h
     hle/service/nifm/nifm_a.cpp
@@ -171,6 +179,8 @@ add_library(core STATIC
     hle/service/nvdrv/devices/nvhost_ctrl_gpu.h
     hle/service/nvdrv/devices/nvhost_gpu.cpp
     hle/service/nvdrv/devices/nvhost_gpu.h
+    hle/service/nvdrv/devices/nvhost_nvdec.cpp
+    hle/service/nvdrv/devices/nvhost_nvdec.h
     hle/service/nvdrv/devices/nvmap.cpp
     hle/service/nvdrv/devices/nvmap.h
     hle/service/nvdrv/interface.cpp
@@ -249,6 +259,8 @@ add_library(core STATIC
     loader/linker.h
     loader/loader.cpp
     loader/loader.h
+    loader/nca.cpp
+    loader/nca.h
     loader/nro.cpp
     loader/nro.h
     loader/nso.cpp

src/core/arm/dynarmic/arm_dynarmic.cpp

@@ -55,8 +55,8 @@ public:
     }
 
     void InterpreterFallback(u64 pc, size_t num_instructions) override {
-        NGLOG_INFO(Core_ARM, "Unicorn fallback @ 0x{:X} for {} instructions (instr = {:08X})", pc,
-                   num_instructions, MemoryReadCode(pc));
+        LOG_INFO(Core_ARM, "Unicorn fallback @ 0x{:X} for {} instructions (instr = {:08X})", pc,
+                 num_instructions, MemoryReadCode(pc));
 
         ARM_Interface::ThreadContext ctx;
         parent.SaveContext(ctx);

src/core/arm/unicorn/arm_unicorn.cpp

@@ -35,6 +35,17 @@ LoadDll LoadDll::g_load_dll;
         }                                                                                          \
     } while (0)
 
+static void CodeHook(uc_engine* uc, uint64_t address, uint32_t size, void* user_data) {
+    GDBStub::BreakpointAddress bkpt =
+        GDBStub::GetNextBreakpointFromAddress(address, GDBStub::BreakpointType::Execute);
+    if (GDBStub::IsMemoryBreak() ||
+        (bkpt.type != GDBStub::BreakpointType::None && address == bkpt.address)) {
+        auto core = static_cast<ARM_Unicorn*>(user_data);
+        core->RecordBreak(bkpt);
+        uc_emu_stop(uc);
+    }
+}
+
 static void InterruptHook(uc_engine* uc, u32 intNo, void* user_data) {
     u32 esr{};
     CHECKED(uc_reg_read(uc, UC_ARM64_REG_ESR, &esr));
@@ -67,6 +78,10 @@ ARM_Unicorn::ARM_Unicorn() {
     uc_hook hook{};
     CHECKED(uc_hook_add(uc, &hook, UC_HOOK_INTR, (void*)InterruptHook, this, 0, -1));
     CHECKED(uc_hook_add(uc, &hook, UC_HOOK_MEM_INVALID, (void*)UnmappedMemoryHook, this, 0, -1));
+    if (GDBStub::IsServerEnabled()) {
+        CHECKED(uc_hook_add(uc, &hook, UC_HOOK_CODE, (void*)CodeHook, this, 0, -1));
+        last_bkpt_hit = false;
+    }
 }
 
 ARM_Unicorn::~ARM_Unicorn() {
@@ -155,7 +170,11 @@ void ARM_Unicorn::SetTlsAddress(VAddr base) {
 }
 
 void ARM_Unicorn::Run() {
-    ExecuteInstructions(std::max(CoreTiming::GetDowncount(), 0));
+    if (GDBStub::IsServerEnabled()) {
+        ExecuteInstructions(std::max(4000000, 0));
+    } else {
+        ExecuteInstructions(std::max(CoreTiming::GetDowncount(), 0));
+    }
 }
 
 void ARM_Unicorn::Step() {
@@ -168,6 +187,18 @@ void ARM_Unicorn::ExecuteInstructions(int num_instructions) {
     MICROPROFILE_SCOPE(ARM_Jit);
     CHECKED(uc_emu_start(uc, GetPC(), 1ULL << 63, 0, num_instructions));
     CoreTiming::AddTicks(num_instructions);
+    if (GDBStub::IsServerEnabled()) {
+        if (last_bkpt_hit) {
+            uc_reg_write(uc, UC_ARM64_REG_PC, &last_bkpt.address);
+        }
+        Kernel::Thread* thread = Kernel::GetCurrentThread();
+        SaveContext(thread->context);
+        if (last_bkpt_hit) {
+            last_bkpt_hit = false;
+            GDBStub::Break();
+        }
+        GDBStub::SendTrap(thread, 5);
+    }
 }
 
 void ARM_Unicorn::SaveContext(ARM_Interface::ThreadContext& ctx) {
@@ -233,3 +264,8 @@ void ARM_Unicorn::PrepareReschedule() {
 }
 
 void ARM_Unicorn::ClearInstructionCache() {}
+
+void ARM_Unicorn::RecordBreak(GDBStub::BreakpointAddress bkpt) {
+    last_bkpt = bkpt;
+    last_bkpt_hit = true;
+}

src/core/arm/unicorn/arm_unicorn.h

@@ -7,6 +7,7 @@
 #include <unicorn/unicorn.h>
 #include "common/common_types.h"
 #include "core/arm/arm_interface.h"
+#include "core/gdbstub/gdbstub.h"
 
 class ARM_Unicorn final : public ARM_Interface {
 public:
@@ -35,7 +36,10 @@ public:
     void Step() override;
     void ClearInstructionCache() override;
     void PageTableChanged() override{};
+    void RecordBreak(GDBStub::BreakpointAddress bkpt);
 
 private:
     uc_engine* uc{};
+    GDBStub::BreakpointAddress last_bkpt{};
+    bool last_bkpt_hit;
 };

src/core/core.cpp

@@ -19,6 +19,7 @@
 #include "core/loader/loader.h"
 #include "core/memory_setup.h"
 #include "core/settings.h"
+#include "file_sys/vfs_real.h"
 #include "video_core/video_core.h"
 
 namespace Core {
@@ -84,18 +85,18 @@ System::ResultStatus System::SingleStep() {
 }
 
 System::ResultStatus System::Load(EmuWindow* emu_window, const std::string& filepath) {
-    app_loader = Loader::GetLoader(filepath);
+    app_loader = Loader::GetLoader(std::make_shared<FileSys::RealVfsFile>(filepath));
 
     if (!app_loader) {
-        NGLOG_CRITICAL(Core, "Failed to obtain loader for {}!", filepath);
+        LOG_CRITICAL(Core, "Failed to obtain loader for {}!", filepath);
         return ResultStatus::ErrorGetLoader;
     }
     std::pair<boost::optional<u32>, Loader::ResultStatus> system_mode =
         app_loader->LoadKernelSystemMode();
 
     if (system_mode.second != Loader::ResultStatus::Success) {
-        NGLOG_CRITICAL(Core, "Failed to determine system mode (Error {})!",
-                       static_cast<int>(system_mode.second));
+        LOG_CRITICAL(Core, "Failed to determine system mode (Error {})!",
+                     static_cast<int>(system_mode.second));
 
         switch (system_mode.second) {
         case Loader::ResultStatus::ErrorEncrypted:
@@ -111,15 +112,15 @@ System::ResultStatus System::Load(EmuWindow* emu_window, const std::string& file
 
     ResultStatus init_result{Init(emu_window, system_mode.first.get())};
     if (init_result != ResultStatus::Success) {
-        NGLOG_CRITICAL(Core, "Failed to initialize system (Error {})!",
-                       static_cast<int>(init_result));
+        LOG_CRITICAL(Core, "Failed to initialize system (Error {})!",
+                     static_cast<int>(init_result));
         System::Shutdown();
         return init_result;
     }
 
     const Loader::ResultStatus load_result{app_loader->Load(current_process)};
     if (Loader::ResultStatus::Success != load_result) {
-        NGLOG_CRITICAL(Core, "Failed to load ROM (Error {})!", static_cast<int>(load_result));
+        LOG_CRITICAL(Core, "Failed to load ROM (Error {})!", static_cast<int>(load_result));
         System::Shutdown();
 
         switch (load_result) {
@@ -161,7 +162,7 @@ Cpu& System::CpuCore(size_t core_index) {
 }
 
 System::ResultStatus System::Init(EmuWindow* emu_window, u32 system_mode) {
-    NGLOG_DEBUG(HW_Memory, "initialized OK");
+    LOG_DEBUG(HW_Memory, "initialized OK");
 
     CoreTiming::Init();
 
@@ -196,7 +197,7 @@ System::ResultStatus System::Init(EmuWindow* emu_window, u32 system_mode) {
         }
     }
 
-    NGLOG_DEBUG(Core, "Initialized OK");
+    LOG_DEBUG(Core, "Initialized OK");
 
     // Reset counters and set time origin to current frame
     GetAndResetPerfStats();
@@ -245,7 +246,7 @@ void System::Shutdown() {
     // Close app loader
     app_loader.reset();
 
-    NGLOG_DEBUG(Core, "Shutdown OK");
+    LOG_DEBUG(Core, "Shutdown OK");
 }
 
 Service::SM::ServiceManager& System::ServiceManager() {

src/core/core_cpu.cpp

@@ -56,7 +56,7 @@ Cpu::Cpu(std::shared_ptr<CpuBarrier> cpu_barrier, size_t core_index)
         arm_interface = std::make_shared<ARM_Dynarmic>();
 #else
         cpu_core = std::make_shared<ARM_Unicorn>();
-        NGLOG_WARNING(Core, "CPU JIT requested, but Dynarmic not available");
+        LOG_WARNING(Core, "CPU JIT requested, but Dynarmic not available");
 #endif
     } else {
         arm_interface = std::make_shared<ARM_Unicorn>();
@@ -75,7 +75,7 @@ void Cpu::RunLoop(bool tight_loop) {
     // If we don't have a currently active thread then don't execute instructions,
     // instead advance to the next event and try to yield to the next thread
     if (Kernel::GetCurrentThread() == nullptr) {
-        NGLOG_TRACE(Core, "Core-{} idling", core_index);
+        LOG_TRACE(Core, "Core-{} idling", core_index);
 
         if (IsMainCore()) {
             CoreTiming::Idle();

src/core/core_timing.cpp

@@ -74,11 +74,11 @@ static void EmptyTimedCallback(u64 userdata, s64 cyclesLate) {}
 
 s64 usToCycles(s64 us) {
     if (us / 1000000 > MAX_VALUE_TO_MULTIPLY) {
-        NGLOG_ERROR(Core_Timing, "Integer overflow, use max value");
+        LOG_ERROR(Core_Timing, "Integer overflow, use max value");
         return std::numeric_limits<s64>::max();
     }
     if (us > MAX_VALUE_TO_MULTIPLY) {
-        NGLOG_DEBUG(Core_Timing, "Time very big, do rounding");
+        LOG_DEBUG(Core_Timing, "Time very big, do rounding");
         return BASE_CLOCK_RATE * (us / 1000000);
     }
     return (BASE_CLOCK_RATE * us) / 1000000;
@@ -86,11 +86,11 @@ s64 usToCycles(s64 us) {
 
 s64 usToCycles(u64 us) {
     if (us / 1000000 > MAX_VALUE_TO_MULTIPLY) {
-        NGLOG_ERROR(Core_Timing, "Integer overflow, use max value");
+        LOG_ERROR(Core_Timing, "Integer overflow, use max value");
         return std::numeric_limits<s64>::max();
     }
     if (us > MAX_VALUE_TO_MULTIPLY) {
-        NGLOG_DEBUG(Core_Timing, "Time very big, do rounding");
+        LOG_DEBUG(Core_Timing, "Time very big, do rounding");
         return BASE_CLOCK_RATE * static_cast<s64>(us / 1000000);
     }
     return (BASE_CLOCK_RATE * static_cast<s64>(us)) / 1000000;
@@ -98,11 +98,11 @@ s64 usToCycles(u64 us) {
 
 s64 nsToCycles(s64 ns) {
     if (ns / 1000000000 > MAX_VALUE_TO_MULTIPLY) {
-        NGLOG_ERROR(Core_Timing, "Integer overflow, use max value");
+        LOG_ERROR(Core_Timing, "Integer overflow, use max value");
         return std::numeric_limits<s64>::max();
     }
     if (ns > MAX_VALUE_TO_MULTIPLY) {
-        NGLOG_DEBUG(Core_Timing, "Time very big, do rounding");
+        LOG_DEBUG(Core_Timing, "Time very big, do rounding");
         return BASE_CLOCK_RATE * (ns / 1000000000);
     }
     return (BASE_CLOCK_RATE * ns) / 1000000000;
@@ -110,11 +110,11 @@ s64 nsToCycles(s64 ns) {
 
 s64 nsToCycles(u64 ns) {
     if (ns / 1000000000 > MAX_VALUE_TO_MULTIPLY) {
-        NGLOG_ERROR(Core_Timing, "Integer overflow, use max value");
+        LOG_ERROR(Core_Timing, "Integer overflow, use max value");
         return std::numeric_limits<s64>::max();
     }
     if (ns > MAX_VALUE_TO_MULTIPLY) {
-        NGLOG_DEBUG(Core_Timing, "Time very big, do rounding");
+        LOG_DEBUG(Core_Timing, "Time very big, do rounding");
         return BASE_CLOCK_RATE * (static_cast<s64>(ns) / 1000000000);
     }
     return (BASE_CLOCK_RATE * static_cast<s64>(ns)) / 1000000000;

src/core/file_sys/content_archive.cpp

@@ -0,0 +1,164 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/file_sys/content_archive.h"
+#include "core/file_sys/vfs_offset.h"
+#include "core/loader/loader.h"
+
+namespace FileSys {
+
+// Media offsets in headers are stored divided by 512. Mult. by this to get real offset.
+constexpr u64 MEDIA_OFFSET_MULTIPLIER = 0x200;
+
+constexpr u64 SECTION_HEADER_SIZE = 0x200;
+constexpr u64 SECTION_HEADER_OFFSET = 0x400;
+
+constexpr u32 IVFC_MAX_LEVEL = 6;
+
+enum class NCASectionFilesystemType : u8 { PFS0 = 0x2, ROMFS = 0x3 };
+
+struct NCASectionHeaderBlock {
+    INSERT_PADDING_BYTES(3);
+    NCASectionFilesystemType filesystem_type;
+    u8 crypto_type;
+    INSERT_PADDING_BYTES(3);
+};
+static_assert(sizeof(NCASectionHeaderBlock) == 0x8, "NCASectionHeaderBlock has incorrect size.");
+
+struct PFS0Superblock {
+    NCASectionHeaderBlock header_block;
+    std::array<u8, 0x20> hash;
+    u32_le size;
+    INSERT_PADDING_BYTES(4);
+    u64_le hash_table_offset;
+    u64_le hash_table_size;
+    u64_le pfs0_header_offset;
+    u64_le pfs0_size;
+    INSERT_PADDING_BYTES(432);
+};
+static_assert(sizeof(PFS0Superblock) == 0x200, "PFS0Superblock has incorrect size.");
+
+struct IVFCLevel {
+    u64_le offset;
+    u64_le size;
+    u32_le block_size;
+    u32_le reserved;
+};
+static_assert(sizeof(IVFCLevel) == 0x18, "IVFCLevel has incorrect size.");
+
+struct RomFSSuperblock {
+    NCASectionHeaderBlock header_block;
+    u32_le magic;
+    u32_le magic_number;
+    INSERT_PADDING_BYTES(8);
+    std::array<IVFCLevel, 6> levels;
+    INSERT_PADDING_BYTES(64);
+};
+static_assert(sizeof(RomFSSuperblock) == 0xE8, "RomFSSuperblock has incorrect size.");
+
+NCA::NCA(VirtualFile file_) : file(file_) {
+    if (sizeof(NCAHeader) != file->ReadObject(&header))
+        LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+    if (!IsValidNCA(header)) {
+        status = Loader::ResultStatus::ErrorInvalidFormat;
+        return;
+    }
+
+    std::ptrdiff_t number_sections =
+        std::count_if(std::begin(header.section_tables), std::end(header.section_tables),
+                      [](NCASectionTableEntry entry) { return entry.media_offset > 0; });
+
+    for (std::ptrdiff_t i = 0; i < number_sections; ++i) {
+        // Seek to beginning of this section.
+        NCASectionHeaderBlock block{};
+        if (sizeof(NCASectionHeaderBlock) !=
+            file->ReadObject(&block, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
+            LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+        if (block.filesystem_type == NCASectionFilesystemType::ROMFS) {
+            RomFSSuperblock sb{};
+            if (sizeof(RomFSSuperblock) !=
+                file->ReadObject(&sb, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
+                LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+            const size_t romfs_offset =
+                header.section_tables[i].media_offset * MEDIA_OFFSET_MULTIPLIER +
+                sb.levels[IVFC_MAX_LEVEL - 1].offset;
+            const size_t romfs_size = sb.levels[IVFC_MAX_LEVEL - 1].size;
+            files.emplace_back(std::make_shared<OffsetVfsFile>(file, romfs_size, romfs_offset));
+            romfs = files.back();
+        } else if (block.filesystem_type == NCASectionFilesystemType::PFS0) {
+            PFS0Superblock sb{};
+            // Seek back to beginning of this section.
+            if (sizeof(PFS0Superblock) !=
+                file->ReadObject(&sb, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
+                LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+            u64 offset = (static_cast<u64>(header.section_tables[i].media_offset) *
+                          MEDIA_OFFSET_MULTIPLIER) +
+                         sb.pfs0_header_offset;
+            u64 size = MEDIA_OFFSET_MULTIPLIER * (header.section_tables[i].media_end_offset -
+                                                  header.section_tables[i].media_offset);
+            auto npfs = std::make_shared<PartitionFilesystem>(
+                std::make_shared<OffsetVfsFile>(file, size, offset));
+
+            if (npfs->GetStatus() == Loader::ResultStatus::Success) {
+                dirs.emplace_back(npfs);
+                if (IsDirectoryExeFS(dirs.back()))
+                    exefs = dirs.back();
+            }
+        }
+    }
+
+    status = Loader::ResultStatus::Success;
+}
+
+Loader::ResultStatus NCA::GetStatus() const {
+    return status;
+}
+
+std::vector<std::shared_ptr<VfsFile>> NCA::GetFiles() const {
+    if (status != Loader::ResultStatus::Success)
+        return {};
+    return files;
+}
+
+std::vector<std::shared_ptr<VfsDirectory>> NCA::GetSubdirectories() const {
+    if (status != Loader::ResultStatus::Success)
+        return {};
+    return dirs;
+}
+
+std::string NCA::GetName() const {
+    return file->GetName();
+}
+
+std::shared_ptr<VfsDirectory> NCA::GetParentDirectory() const {
+    return file->GetContainingDirectory();
+}
+
+NCAContentType NCA::GetType() const {
+    return header.content_type;
+}
+
+u64 NCA::GetTitleId() const {
+    if (status != Loader::ResultStatus::Success)
+        return {};
+    return header.title_id;
+}
+
+VirtualFile NCA::GetRomFS() const {
+    return romfs;
+}
+
+VirtualDir NCA::GetExeFS() const {
+    return exefs;
+}
+
+bool NCA::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
+    return false;
+}
+} // namespace FileSys

src/core/file_sys/content_archive.h

@@ -0,0 +1,89 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/swap.h"
+#include "core/file_sys/partition_filesystem.h"
+
+namespace FileSys {
+
+enum class NCAContentType : u8 { Program = 0, Meta = 1, Control = 2, Manual = 3, Data = 4 };
+
+struct NCASectionTableEntry {
+    u32_le media_offset;
+    u32_le media_end_offset;
+    INSERT_PADDING_BYTES(0x8);
+};
+static_assert(sizeof(NCASectionTableEntry) == 0x10, "NCASectionTableEntry has incorrect size.");
+
+struct NCAHeader {
+    std::array<u8, 0x100> rsa_signature_1;
+    std::array<u8, 0x100> rsa_signature_2;
+    u32_le magic;
+    u8 is_system;
+    NCAContentType content_type;
+    u8 crypto_type;
+    u8 key_index;
+    u64_le size;
+    u64_le title_id;
+    INSERT_PADDING_BYTES(0x4);
+    u32_le sdk_version;
+    u8 crypto_type_2;
+    INSERT_PADDING_BYTES(15);
+    std::array<u8, 0x10> rights_id;
+    std::array<NCASectionTableEntry, 0x4> section_tables;
+    std::array<std::array<u8, 0x20>, 0x4> hash_tables;
+    std::array<std::array<u8, 0x10>, 0x4> key_area;
+    INSERT_PADDING_BYTES(0xC0);
+};
+static_assert(sizeof(NCAHeader) == 0x400, "NCAHeader has incorrect size.");
+
+static bool IsDirectoryExeFS(std::shared_ptr<FileSys::VfsDirectory> pfs) {
+    // According to switchbrew, an exefs must only contain these two files:
+    return pfs->GetFile("main") != nullptr && pfs->GetFile("main.npdm") != nullptr;
+}
+
+static bool IsValidNCA(const NCAHeader& header) {
+    return header.magic == Common::MakeMagic('N', 'C', 'A', '2') ||
+           header.magic == Common::MakeMagic('N', 'C', 'A', '3');
+}
+
+// An implementation of VfsDirectory that represents a Nintendo Content Archive (NCA) conatiner.
+// After construction, use GetStatus to determine if the file is valid and ready to be used.
+class NCA : public ReadOnlyVfsDirectory {
+public:
+    explicit NCA(VirtualFile file);
+    Loader::ResultStatus GetStatus() const;
+
+    std::vector<std::shared_ptr<VfsFile>> GetFiles() const override;
+    std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const override;
+    std::string GetName() const override;
+    std::shared_ptr<VfsDirectory> GetParentDirectory() const override;
+
+    NCAContentType GetType() const;
+    u64 GetTitleId() const;
+
+    VirtualFile GetRomFS() const;
+    VirtualDir GetExeFS() const;
+
+protected:
+    bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;
+
+private:
+    std::vector<VirtualDir> dirs;
+    std::vector<VirtualFile> files;
+
+    VirtualFile romfs = nullptr;
+    VirtualDir exefs = nullptr;
+    VirtualFile file;
+
+    NCAHeader header{};
+
+    Loader::ResultStatus status{};
+};
+
+} // namespace FileSys

src/core/file_sys/disk_filesystem.cpp

@@ -1,237 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <cstring>
-#include <memory>
-#include "common/common_types.h"
-#include "common/logging/log.h"
-#include "core/file_sys/disk_filesystem.h"
-#include "core/file_sys/errors.h"
-
-namespace FileSys {
-
-static std::string ModeFlagsToString(Mode mode) {
-    std::string mode_str;
-    u32 mode_flags = static_cast<u32>(mode);
-
-    // Calculate the correct open mode for the file.
-    if ((mode_flags & static_cast<u32>(Mode::Read)) &&
-        (mode_flags & static_cast<u32>(Mode::Write))) {
-        if (mode_flags & static_cast<u32>(Mode::Append))
-            mode_str = "a+";
-        else
-            mode_str = "r+";
-    } else {
-        if (mode_flags & static_cast<u32>(Mode::Read))
-            mode_str = "r";
-        else if (mode_flags & static_cast<u32>(Mode::Append))
-            mode_str = "a";
-        else if (mode_flags & static_cast<u32>(Mode::Write))
-            mode_str = "w";
-    }
-
-    mode_str += "b";
-
-    return mode_str;
-}
-
-std::string Disk_FileSystem::GetName() const {
-    return "Disk";
-}
-
-ResultVal<std::unique_ptr<StorageBackend>> Disk_FileSystem::OpenFile(const std::string& path,
-                                                                     Mode mode) const {
-
-    // Calculate the correct open mode for the file.
-    std::string mode_str = ModeFlagsToString(mode);
-
-    std::string full_path = base_directory + path;
-    auto file = std::make_shared<FileUtil::IOFile>(full_path, mode_str.c_str());
-
-    if (!file->IsOpen()) {
-        return ERROR_PATH_NOT_FOUND;
-    }
-
-    return MakeResult<std::unique_ptr<StorageBackend>>(
-        std::make_unique<Disk_Storage>(std::move(file)));
-}
-
-ResultCode Disk_FileSystem::DeleteFile(const std::string& path) const {
-    if (!FileUtil::Exists(path)) {
-        return ERROR_PATH_NOT_FOUND;
-    }
-
-    FileUtil::Delete(path);
-
-    return RESULT_SUCCESS;
-}
-
-ResultCode Disk_FileSystem::RenameFile(const std::string& src_path,
-                                       const std::string& dest_path) const {
-    const std::string full_src_path = base_directory + src_path;
-    const std::string full_dest_path = base_directory + dest_path;
-
-    if (!FileUtil::Exists(full_src_path)) {
-        return ERROR_PATH_NOT_FOUND;
-    }
-    // TODO(wwylele): Use correct error code
-    return FileUtil::Rename(full_src_path, full_dest_path) ? RESULT_SUCCESS : ResultCode(-1);
-}
-
-ResultCode Disk_FileSystem::DeleteDirectory(const Path& path) const {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode Disk_FileSystem::DeleteDirectoryRecursively(const Path& path) const {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode Disk_FileSystem::CreateFile(const std::string& path, u64 size) const {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
-
-    std::string full_path = base_directory + path;
-    if (size == 0) {
-        FileUtil::CreateEmptyFile(full_path);
-        return RESULT_SUCCESS;
-    }
-
-    FileUtil::IOFile file(full_path, "wb");
-    // Creates a sparse file (or a normal file on filesystems without the concept of sparse files)
-    // We do this by seeking to the right size, then writing a single null byte.
-    if (file.Seek(size - 1, SEEK_SET) && file.WriteBytes("", 1) == 1) {
-        return RESULT_SUCCESS;
-    }
-
-    NGLOG_ERROR(Service_FS, "Too large file");
-    // TODO(Subv): Find out the correct error code
-    return ResultCode(-1);
-}
-
-ResultCode Disk_FileSystem::CreateDirectory(const std::string& path) const {
-    // TODO(Subv): Perform path validation to prevent escaping the emulator sandbox.
-    std::string full_path = base_directory + path;
-
-    if (FileUtil::CreateDir(full_path)) {
-        return RESULT_SUCCESS;
-    }
-
-    NGLOG_CRITICAL(Service_FS, "(unreachable) Unknown error creating {}", full_path);
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode Disk_FileSystem::RenameDirectory(const Path& src_path, const Path& dest_path) const {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultVal<std::unique_ptr<DirectoryBackend>> Disk_FileSystem::OpenDirectory(
-    const std::string& path) const {
-
-    std::string full_path = base_directory + path;
-
-    if (!FileUtil::IsDirectory(full_path)) {
-        // TODO(Subv): Find the correct error code for this.
-        return ResultCode(-1);
-    }
-
-    auto directory = std::make_unique<Disk_Directory>(full_path);
-    return MakeResult<std::unique_ptr<DirectoryBackend>>(std::move(directory));
-}
-
-u64 Disk_FileSystem::GetFreeSpaceSize() const {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
-    return 0;
-}
-
-ResultVal<FileSys::EntryType> Disk_FileSystem::GetEntryType(const std::string& path) const {
-    std::string full_path = base_directory + path;
-    if (!FileUtil::Exists(full_path)) {
-        return ERROR_PATH_NOT_FOUND;
-    }
-
-    if (FileUtil::IsDirectory(full_path))
-        return MakeResult(EntryType::Directory);
-
-    return MakeResult(EntryType::File);
-}
-
-ResultVal<size_t> Disk_Storage::Read(const u64 offset, const size_t length, u8* buffer) const {
-    NGLOG_TRACE(Service_FS, "called offset={}, length={}", offset, length);
-    file->Seek(offset, SEEK_SET);
-    return MakeResult<size_t>(file->ReadBytes(buffer, length));
-}
-
-ResultVal<size_t> Disk_Storage::Write(const u64 offset, const size_t length, const bool flush,
-                                      const u8* buffer) const {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
-    file->Seek(offset, SEEK_SET);
-    size_t written = file->WriteBytes(buffer, length);
-    if (flush) {
-        file->Flush();
-    }
-    return MakeResult<size_t>(written);
-}
-
-u64 Disk_Storage::GetSize() const {
-    return file->GetSize();
-}
-
-bool Disk_Storage::SetSize(const u64 size) const {
-    file->Resize(size);
-    file->Flush();
-    return true;
-}
-
-Disk_Directory::Disk_Directory(const std::string& path) {
-    unsigned size = FileUtil::ScanDirectoryTree(path, directory);
-    directory.size = size;
-    directory.isDirectory = true;
-    children_iterator = directory.children.begin();
-}
-
-u64 Disk_Directory::Read(const u64 count, Entry* entries) {
-    u64 entries_read = 0;
-
-    while (entries_read < count && children_iterator != directory.children.cend()) {
-        const FileUtil::FSTEntry& file = *children_iterator;
-        const std::string& filename = file.virtualName;
-        Entry& entry = entries[entries_read];
-
-        NGLOG_TRACE(Service_FS, "File {}: size={} dir={}", filename, file.size, file.isDirectory);
-
-        // TODO(Link Mauve): use a proper conversion to UTF-16.
-        for (size_t j = 0; j < FILENAME_LENGTH; ++j) {
-            entry.filename[j] = filename[j];
-            if (!filename[j])
-                break;
-        }
-
-        if (file.isDirectory) {
-            entry.file_size = 0;
-            entry.type = EntryType::Directory;
-        } else {
-            entry.file_size = file.size;
-            entry.type = EntryType::File;
-        }
-
-        ++entries_read;
-        ++children_iterator;
-    }
-    return entries_read;
-}
-
-u64 Disk_Directory::GetEntryCount() const {
-    // We convert the children iterator into a const_iterator to allow template argument deduction
-    // in std::distance.
-    std::vector<FileUtil::FSTEntry>::const_iterator current = children_iterator;
-    return std::distance(current, directory.children.end());
-}
-
-} // namespace FileSys

src/core/file_sys/disk_filesystem.h

@@ -1,84 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <cstddef>
-#include <memory>
-#include <string>
-#include "common/common_types.h"
-#include "common/file_util.h"
-#include "core/file_sys/directory.h"
-#include "core/file_sys/filesystem.h"
-#include "core/file_sys/storage.h"
-#include "core/hle/result.h"
-
-namespace FileSys {
-
-class Disk_FileSystem : public FileSystemBackend {
-public:
-    explicit Disk_FileSystem(std::string base_directory)
-        : base_directory(std::move(base_directory)) {}
-
-    std::string GetName() const override;
-
-    ResultVal<std::unique_ptr<StorageBackend>> OpenFile(const std::string& path,
-                                                        Mode mode) const override;
-    ResultCode DeleteFile(const std::string& path) const override;
-    ResultCode RenameFile(const std::string& src_path, const std::string& dest_path) const override;
-    ResultCode DeleteDirectory(const Path& path) const override;
-    ResultCode DeleteDirectoryRecursively(const Path& path) const override;
-    ResultCode CreateFile(const std::string& path, u64 size) const override;
-    ResultCode CreateDirectory(const std::string& path) const override;
-    ResultCode RenameDirectory(const Path& src_path, const Path& dest_path) const override;
-    ResultVal<std::unique_ptr<DirectoryBackend>> OpenDirectory(
-        const std::string& path) const override;
-    u64 GetFreeSpaceSize() const override;
-    ResultVal<EntryType> GetEntryType(const std::string& path) const override;
-
-protected:
-    std::string base_directory;
-};
-
-class Disk_Storage : public StorageBackend {
-public:
-    explicit Disk_Storage(std::shared_ptr<FileUtil::IOFile> file) : file(std::move(file)) {}
-
-    ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override;
-    ResultVal<size_t> Write(u64 offset, size_t length, bool flush, const u8* buffer) const override;
-    u64 GetSize() const override;
-    bool SetSize(u64 size) const override;
-    bool Close() const override {
-        return false;
-    }
-    void Flush() const override {}
-
-private:
-    std::shared_ptr<FileUtil::IOFile> file;
-};
-
-class Disk_Directory : public DirectoryBackend {
-public:
-    explicit Disk_Directory(const std::string& path);
-
-    ~Disk_Directory() override {
-        Close();
-    }
-
-    u64 Read(const u64 count, Entry* entries) override;
-    u64 GetEntryCount() const override;
-
-    bool Close() const override {
-        return true;
-    }
-
-protected:
-    FileUtil::FSTEntry directory;
-
-    // We need to remember the last entry we returned, so a subsequent call to Read will continue
-    // from the next one. This iterator will always point to the next unread entry.
-    std::vector<FileUtil::FSTEntry>::iterator children_iterator;
-};
-
-} // namespace FileSys

src/core/file_sys/filesystem.cpp

@@ -71,7 +71,7 @@ std::string Path::AsString() const {
     case Binary:
     default:
         // TODO(yuriks): Add assert
-        NGLOG_ERROR(Service_FS, "LowPathType cannot be converted to string!");
+        LOG_ERROR(Service_FS, "LowPathType cannot be converted to string!");
         return {};
     }
 }
@@ -87,7 +87,7 @@ std::u16string Path::AsU16Str() const {
     case Invalid:
     case Binary:
         // TODO(yuriks): Add assert
-        NGLOG_ERROR(Service_FS, "LowPathType cannot be converted to u16string!");
+        LOG_ERROR(Service_FS, "LowPathType cannot be converted to u16string!");
         return {};
     }
 
@@ -115,7 +115,7 @@ std::vector<u8> Path::AsBinary() const {
     case Invalid:
     default:
         // TODO(yuriks): Add assert
-        NGLOG_ERROR(Service_FS, "LowPathType cannot be converted to binary!");
+        LOG_ERROR(Service_FS, "LowPathType cannot be converted to binary!");
         return {};
     }
 }

src/core/file_sys/filesystem.h

@@ -66,136 +66,4 @@ private:
     std::u16string u16str;
 };
 
-/// Parameters of the archive, as specified in the Create or Format call.
-struct ArchiveFormatInfo {
-    u32_le total_size;         ///< The pre-defined size of the archive.
-    u32_le number_directories; ///< The pre-defined number of directories in the archive.
-    u32_le number_files;       ///< The pre-defined number of files in the archive.
-    u8 duplicate_data;         ///< Whether the archive should duplicate the data.
-};
-static_assert(std::is_pod<ArchiveFormatInfo>::value, "ArchiveFormatInfo is not POD");
-
-class FileSystemBackend : NonCopyable {
-public:
-    virtual ~FileSystemBackend() {}
-
-    /**
-     * Get a descriptive name for the archive (e.g. "RomFS", "SaveData", etc.)
-     */
-    virtual std::string GetName() const = 0;
-
-    /**
-     * Create a file specified by its path
-     * @param path Path relative to the Archive
-     * @param size The size of the new file, filled with zeroes
-     * @return Result of the operation
-     */
-    virtual ResultCode CreateFile(const std::string& path, u64 size) const = 0;
-
-    /**
-     * Delete a file specified by its path
-     * @param path Path relative to the archive
-     * @return Result of the operation
-     */
-    virtual ResultCode DeleteFile(const std::string& path) const = 0;
-
-    /**
-     * Create a directory specified by its path
-     * @param path Path relative to the archive
-     * @return Result of the operation
-     */
-    virtual ResultCode CreateDirectory(const std::string& path) const = 0;
-
-    /**
-     * Delete a directory specified by its path
-     * @param path Path relative to the archive
-     * @return Result of the operation
-     */
-    virtual ResultCode DeleteDirectory(const Path& path) const = 0;
-
-    /**
-     * Delete a directory specified by its path and anything under it
-     * @param path Path relative to the archive
-     * @return Result of the operation
-     */
-    virtual ResultCode DeleteDirectoryRecursively(const Path& path) const = 0;
-
-    /**
-     * Rename a File specified by its path
-     * @param src_path Source path relative to the archive
-     * @param dest_path Destination path relative to the archive
-     * @return Result of the operation
-     */
-    virtual ResultCode RenameFile(const std::string& src_path,
-                                  const std::string& dest_path) const = 0;
-
-    /**
-     * Rename a Directory specified by its path
-     * @param src_path Source path relative to the archive
-     * @param dest_path Destination path relative to the archive
-     * @return Result of the operation
-     */
-    virtual ResultCode RenameDirectory(const Path& src_path, const Path& dest_path) const = 0;
-
-    /**
-     * Open a file specified by its path, using the specified mode
-     * @param path Path relative to the archive
-     * @param mode Mode to open the file with
-     * @return Opened file, or error code
-     */
-    virtual ResultVal<std::unique_ptr<StorageBackend>> OpenFile(const std::string& path,
-                                                                Mode mode) const = 0;
-
-    /**
-     * Open a directory specified by its path
-     * @param path Path relative to the archive
-     * @return Opened directory, or error code
-     */
-    virtual ResultVal<std::unique_ptr<DirectoryBackend>> OpenDirectory(
-        const std::string& path) const = 0;
-
-    /**
-     * Get the free space
-     * @return The number of free bytes in the archive
-     */
-    virtual u64 GetFreeSpaceSize() const = 0;
-
-    /**
-     * Get the type of the specified path
-     * @return The type of the specified path or error code
-     */
-    virtual ResultVal<EntryType> GetEntryType(const std::string& path) const = 0;
-};
-
-class FileSystemFactory : NonCopyable {
-public:
-    virtual ~FileSystemFactory() {}
-
-    /**
-     * Get a descriptive name for the archive (e.g. "RomFS", "SaveData", etc.)
-     */
-    virtual std::string GetName() const = 0;
-
-    /**
-     * Tries to open the archive of this type with the specified path
-     * @param path Path to the archive
-     * @return An ArchiveBackend corresponding operating specified archive path.
-     */
-    virtual ResultVal<std::unique_ptr<FileSystemBackend>> Open(const Path& path) = 0;
-
-    /**
-     * Deletes the archive contents and then re-creates the base folder
-     * @param path Path to the archive
-     * @return ResultCode of the operation, 0 on success
-     */
-    virtual ResultCode Format(const Path& path) = 0;
-
-    /**
-     * Retrieves the format info about the archive with the specified path
-     * @param path Path to the archive
-     * @return Format information about the archive or error code
-     */
-    virtual ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const = 0;
-};
-
 } // namespace FileSys

src/core/file_sys/partition_filesystem.cpp

@@ -6,119 +6,119 @@
 #include "common/file_util.h"
 #include "common/logging/log.h"
 #include "core/file_sys/partition_filesystem.h"
+#include "core/file_sys/vfs_offset.h"
 #include "core/loader/loader.h"
 
 namespace FileSys {
 
-Loader::ResultStatus PartitionFilesystem::Load(const std::string& file_path, size_t offset) {
-    FileUtil::IOFile file(file_path, "rb");
-    if (!file.IsOpen())
-        return Loader::ResultStatus::Error;
-
+PartitionFilesystem::PartitionFilesystem(std::shared_ptr<VfsFile> file) {
     // At least be as large as the header
-    if (file.GetSize() < sizeof(Header))
-        return Loader::ResultStatus::Error;
+    if (file->GetSize() < sizeof(Header)) {
+        status = Loader::ResultStatus::Error;
+        return;
+    }
 
     // For cartridges, HFSs can get very large, so we need to calculate the size up to
     // the actual content itself instead of just blindly reading in the entire file.
     Header pfs_header;
-    if (!file.ReadBytes(&pfs_header, sizeof(Header)))
-        return Loader::ResultStatus::Error;
+    if (sizeof(Header) != file->ReadObject(&pfs_header)) {
+        status = Loader::ResultStatus::Error;
+        return;
+    }
+
+    if (pfs_header.magic != Common::MakeMagic('H', 'F', 'S', '0') &&
+        pfs_header.magic != Common::MakeMagic('P', 'F', 'S', '0')) {
+        status = Loader::ResultStatus::ErrorInvalidFormat;
+        return;
+    }
+
+    bool is_hfs = pfs_header.magic == Common::MakeMagic('H', 'F', 'S', '0');
 
-    bool is_hfs = (memcmp(pfs_header.magic.data(), "HFS", 3) == 0);
     size_t entry_size = is_hfs ? sizeof(HFSEntry) : sizeof(PFSEntry);
     size_t metadata_size =
         sizeof(Header) + (pfs_header.num_entries * entry_size) + pfs_header.strtab_size;
 
     // Actually read in now...
-    file.Seek(offset, SEEK_SET);
-    std::vector<u8> file_data(metadata_size);
+    std::vector<u8> file_data = file->ReadBytes(metadata_size);
 
-    if (!file.ReadBytes(file_data.data(), metadata_size))
-        return Loader::ResultStatus::Error;
+    if (file_data.size() != metadata_size) {
+        status = Loader::ResultStatus::Error;
+        return;
+    }
 
-    Loader::ResultStatus result = Load(file_data);
-    if (result != Loader::ResultStatus::Success)
-        NGLOG_ERROR(Service_FS, "Failed to load PFS from file {}!", file_path);
+    size_t total_size = file_data.size();
+    if (total_size < sizeof(Header)) {
+        status = Loader::ResultStatus::Error;
+        return;
+    }
 
-    return result;
-}
+    memcpy(&pfs_header, file_data.data(), sizeof(Header));
+    if (pfs_header.magic != Common::MakeMagic('H', 'F', 'S', '0') &&
+        pfs_header.magic != Common::MakeMagic('P', 'F', 'S', '0')) {
+        status = Loader::ResultStatus::ErrorInvalidFormat;
+        return;
+    }
 
-Loader::ResultStatus PartitionFilesystem::Load(const std::vector<u8>& file_data, size_t offset) {
-    size_t total_size = file_data.size() - offset;
-    if (total_size < sizeof(Header))
-        return Loader::ResultStatus::Error;
+    is_hfs = pfs_header.magic == Common::MakeMagic('H', 'F', 'S', '0');
 
-    memcpy(&pfs_header, &file_data[offset], sizeof(Header));
-    is_hfs = (memcmp(pfs_header.magic.data(), "HFS", 3) == 0);
-
-    size_t entries_offset = offset + sizeof(Header);
-    size_t entry_size = is_hfs ? sizeof(HFSEntry) : sizeof(PFSEntry);
+    size_t entries_offset = sizeof(Header);
     size_t strtab_offset = entries_offset + (pfs_header.num_entries * entry_size);
-    for (u16 i = 0; i < pfs_header.num_entries; i++) {
-        FileEntry entry;
-
-        memcpy(&entry.fs_entry, &file_data[entries_offset + (i * entry_size)], sizeof(FSEntry));
-        entry.name = std::string(reinterpret_cast<const char*>(
-            &file_data[strtab_offset + entry.fs_entry.strtab_offset]));
-        pfs_entries.push_back(std::move(entry));
-    }
-
     content_offset = strtab_offset + pfs_header.strtab_size;
+    for (u16 i = 0; i < pfs_header.num_entries; i++) {
+        FSEntry entry;
 
-    return Loader::ResultStatus::Success;
-}
+        memcpy(&entry, &file_data[entries_offset + (i * entry_size)], sizeof(FSEntry));
+        std::string name(
+            reinterpret_cast<const char*>(&file_data[strtab_offset + entry.strtab_offset]));
 
-u32 PartitionFilesystem::GetNumEntries() const {
-    return pfs_header.num_entries;
-}
-
-u64 PartitionFilesystem::GetEntryOffset(int index) const {
-    if (index > GetNumEntries())
-        return 0;
-
-    return content_offset + pfs_entries[index].fs_entry.offset;
-}
-
-u64 PartitionFilesystem::GetEntrySize(int index) const {
-    if (index > GetNumEntries())
-        return 0;
-
-    return pfs_entries[index].fs_entry.size;
-}
-
-std::string PartitionFilesystem::GetEntryName(int index) const {
-    if (index > GetNumEntries())
-        return "";
-
-    return pfs_entries[index].name;
-}
-
-u64 PartitionFilesystem::GetFileOffset(const std::string& name) const {
-    for (u32 i = 0; i < pfs_header.num_entries; i++) {
-        if (pfs_entries[i].name == name)
-            return content_offset + pfs_entries[i].fs_entry.offset;
+        pfs_files.emplace_back(
+            std::make_shared<OffsetVfsFile>(file, entry.size, content_offset + entry.offset, name));
     }
 
-    return 0;
+    status = Loader::ResultStatus::Success;
 }
 
-u64 PartitionFilesystem::GetFileSize(const std::string& name) const {
-    for (u32 i = 0; i < pfs_header.num_entries; i++) {
-        if (pfs_entries[i].name == name)
-            return pfs_entries[i].fs_entry.size;
-    }
-
-    return 0;
+Loader::ResultStatus PartitionFilesystem::GetStatus() const {
+    return status;
 }
 
-void PartitionFilesystem::Print() const {
-    NGLOG_DEBUG(Service_FS, "Magic:                  {:.4}", pfs_header.magic.data());
-    NGLOG_DEBUG(Service_FS, "Files:                  {}", pfs_header.num_entries);
+std::vector<std::shared_ptr<VfsFile>> PartitionFilesystem::GetFiles() const {
+    return pfs_files;
+}
+
+std::vector<std::shared_ptr<VfsDirectory>> PartitionFilesystem::GetSubdirectories() const {
+    return {};
+}
+
+std::string PartitionFilesystem::GetName() const {
+    return is_hfs ? "HFS0" : "PFS0";
+}
+
+std::shared_ptr<VfsDirectory> PartitionFilesystem::GetParentDirectory() const {
+    // TODO(DarkLordZach): Add support for nested containers.
+    return nullptr;
+}
+
+void PartitionFilesystem::PrintDebugInfo() const {
+    LOG_DEBUG(Service_FS, "Magic:                  {:.4}", pfs_header.magic);
+    LOG_DEBUG(Service_FS, "Files:                  {}", pfs_header.num_entries);
     for (u32 i = 0; i < pfs_header.num_entries; i++) {
-        NGLOG_DEBUG(Service_FS, " > File {}:              {} (0x{:X} bytes, at 0x{:X})", i,
-                    pfs_entries[i].name.c_str(), pfs_entries[i].fs_entry.size,
-                    GetFileOffset(pfs_entries[i].name));
+        LOG_DEBUG(Service_FS, " > File {}:              {} (0x{:X} bytes, at 0x{:X})", i,
+                  pfs_files[i]->GetName(), pfs_files[i]->GetSize(),
+                  dynamic_cast<OffsetVfsFile*>(pfs_files[i].get())->GetOffset());
     }
 }
+
+bool PartitionFilesystem::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
+    auto iter = std::find(pfs_files.begin(), pfs_files.end(), file);
+    if (iter == pfs_files.end())
+        return false;
+
+    pfs_files[iter - pfs_files.begin()] = pfs_files.back();
+    pfs_files.pop_back();
+
+    pfs_dirs.emplace_back(dir);
+
+    return true;
+}
 } // namespace FileSys

src/core/file_sys/partition_filesystem.h

@@ -10,6 +10,7 @@
 #include "common/common_funcs.h"
 #include "common/common_types.h"
 #include "common/swap.h"
+#include "core/file_sys/vfs.h"
 
 namespace Loader {
 enum class ResultStatus;
@@ -21,23 +22,23 @@ namespace FileSys {
  * Helper which implements an interface to parse PFS/HFS filesystems.
  * Data can either be loaded from a file path or data with an offset into it.
  */
-class PartitionFilesystem {
+class PartitionFilesystem : public ReadOnlyVfsDirectory {
 public:
-    Loader::ResultStatus Load(const std::string& file_path, size_t offset = 0);
-    Loader::ResultStatus Load(const std::vector<u8>& file_data, size_t offset = 0);
+    explicit PartitionFilesystem(std::shared_ptr<VfsFile> file);
+    Loader::ResultStatus GetStatus() const;
 
-    u32 GetNumEntries() const;
-    u64 GetEntryOffset(int index) const;
-    u64 GetEntrySize(int index) const;
-    std::string GetEntryName(int index) const;
-    u64 GetFileOffset(const std::string& name) const;
-    u64 GetFileSize(const std::string& name) const;
+    std::vector<std::shared_ptr<VfsFile>> GetFiles() const override;
+    std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const override;
+    std::string GetName() const override;
+    std::shared_ptr<VfsDirectory> GetParentDirectory() const override;
+    void PrintDebugInfo() const;
 
-    void Print() const;
+protected:
+    bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;
 
 private:
     struct Header {
-        std::array<char, 4> magic;
+        u32_le magic;
         u32_le num_entries;
         u32_le strtab_size;
         INSERT_PADDING_BYTES(0x4);
@@ -72,16 +73,14 @@ private:
 
 #pragma pack(pop)
 
-    struct FileEntry {
-        FSEntry fs_entry;
-        std::string name;
-    };
+    Loader::ResultStatus status;
 
     Header pfs_header;
     bool is_hfs;
     size_t content_offset;
 
-    std::vector<FileEntry> pfs_entries;
+    std::vector<VirtualFile> pfs_files;
+    std::vector<VirtualDir> pfs_dirs;
 };
 
 } // namespace FileSys

src/core/file_sys/program_metadata.cpp

@@ -9,40 +9,29 @@
 
 namespace FileSys {
 
-Loader::ResultStatus ProgramMetadata::Load(const std::string& file_path) {
-    FileUtil::IOFile file(file_path, "rb");
-    if (!file.IsOpen())
-        return Loader::ResultStatus::Error;
-
-    std::vector<u8> file_data(file.GetSize());
-
-    if (!file.ReadBytes(file_data.data(), file_data.size()))
-        return Loader::ResultStatus::Error;
-
-    Loader::ResultStatus result = Load(file_data);
-    if (result != Loader::ResultStatus::Success)
-        NGLOG_ERROR(Service_FS, "Failed to load NPDM from file {}!", file_path);
-
-    return result;
-}
-
-Loader::ResultStatus ProgramMetadata::Load(const std::vector<u8> file_data, size_t offset) {
-    size_t total_size = static_cast<size_t>(file_data.size() - offset);
+Loader::ResultStatus ProgramMetadata::Load(VirtualFile file) {
+    size_t total_size = static_cast<size_t>(file->GetSize());
     if (total_size < sizeof(Header))
         return Loader::ResultStatus::Error;
 
-    size_t header_offset = offset;
-    memcpy(&npdm_header, &file_data[offset], sizeof(Header));
+    // TODO(DarkLordZach): Use ReadObject when Header/AcidHeader becomes trivially copyable.
+    std::vector<u8> npdm_header_data = file->ReadBytes(sizeof(Header));
+    if (sizeof(Header) != npdm_header_data.size())
+        return Loader::ResultStatus::Error;
+    std::memcpy(&npdm_header, npdm_header_data.data(), sizeof(Header));
 
-    size_t aci_offset = header_offset + npdm_header.aci_offset;
-    size_t acid_offset = header_offset + npdm_header.acid_offset;
-    memcpy(&aci_header, &file_data[aci_offset], sizeof(AciHeader));
-    memcpy(&acid_header, &file_data[acid_offset], sizeof(AcidHeader));
+    std::vector<u8> acid_header_data = file->ReadBytes(sizeof(AcidHeader), npdm_header.acid_offset);
+    if (sizeof(AcidHeader) != acid_header_data.size())
+        return Loader::ResultStatus::Error;
+    std::memcpy(&acid_header, acid_header_data.data(), sizeof(AcidHeader));
 
-    size_t fac_offset = acid_offset + acid_header.fac_offset;
-    size_t fah_offset = aci_offset + aci_header.fah_offset;
-    memcpy(&acid_file_access, &file_data[fac_offset], sizeof(FileAccessControl));
-    memcpy(&aci_file_access, &file_data[fah_offset], sizeof(FileAccessHeader));
+    if (sizeof(AciHeader) != file->ReadObject(&aci_header, npdm_header.aci_offset))
+        return Loader::ResultStatus::Error;
+
+    if (sizeof(FileAccessControl) != file->ReadObject(&acid_file_access, acid_header.fac_offset))
+        return Loader::ResultStatus::Error;
+    if (sizeof(FileAccessHeader) != file->ReadObject(&aci_file_access, aci_header.fah_offset))
+        return Loader::ResultStatus::Error;
 
     return Loader::ResultStatus::Success;
 }
@@ -76,14 +65,14 @@ u64 ProgramMetadata::GetFilesystemPermissions() const {
 }
 
 void ProgramMetadata::Print() const {
-    NGLOG_DEBUG(Service_FS, "Magic:                  {:.4}", npdm_header.magic.data());
-    NGLOG_DEBUG(Service_FS, "Main thread priority:   0x{:02X}", npdm_header.main_thread_priority);
-    NGLOG_DEBUG(Service_FS, "Main thread core:       {}", npdm_header.main_thread_cpu);
-    NGLOG_DEBUG(Service_FS, "Main thread stack size: 0x{:X} bytes", npdm_header.main_stack_size);
-    NGLOG_DEBUG(Service_FS, "Process category:       {}", npdm_header.process_category);
-    NGLOG_DEBUG(Service_FS, "Flags:                  0x{:02X}", npdm_header.flags);
-    NGLOG_DEBUG(Service_FS, " > 64-bit instructions: {}",
-                npdm_header.has_64_bit_instructions ? "YES" : "NO");
+    LOG_DEBUG(Service_FS, "Magic:                  {:.4}", npdm_header.magic.data());
+    LOG_DEBUG(Service_FS, "Main thread priority:   0x{:02X}", npdm_header.main_thread_priority);
+    LOG_DEBUG(Service_FS, "Main thread core:       {}", npdm_header.main_thread_cpu);
+    LOG_DEBUG(Service_FS, "Main thread stack size: 0x{:X} bytes", npdm_header.main_stack_size);
+    LOG_DEBUG(Service_FS, "Process category:       {}", npdm_header.process_category);
+    LOG_DEBUG(Service_FS, "Flags:                  0x{:02X}", npdm_header.flags);
+    LOG_DEBUG(Service_FS, " > 64-bit instructions: {}",
+              npdm_header.has_64_bit_instructions ? "YES" : "NO");
 
     auto address_space = "Unknown";
     switch (npdm_header.address_space_type) {
@@ -95,19 +84,19 @@ void ProgramMetadata::Print() const {
         break;
     }
 
-    NGLOG_DEBUG(Service_FS, " > Address space:       {}\n", address_space);
+    LOG_DEBUG(Service_FS, " > Address space:       {}\n", address_space);
 
     // Begin ACID printing (potential perms, signed)
-    NGLOG_DEBUG(Service_FS, "Magic:                  {:.4}", acid_header.magic.data());
-    NGLOG_DEBUG(Service_FS, "Flags:                  0x{:02X}", acid_header.flags);
-    NGLOG_DEBUG(Service_FS, " > Is Retail:           {}", acid_header.is_retail ? "YES" : "NO");
-    NGLOG_DEBUG(Service_FS, "Title ID Min:           0x{:016X}", acid_header.title_id_min);
-    NGLOG_DEBUG(Service_FS, "Title ID Max:           0x{:016X}", acid_header.title_id_max);
-    NGLOG_DEBUG(Service_FS, "Filesystem Access:      0x{:016X}\n", acid_file_access.permissions);
+    LOG_DEBUG(Service_FS, "Magic:                  {:.4}", acid_header.magic.data());
+    LOG_DEBUG(Service_FS, "Flags:                  0x{:02X}", acid_header.flags);
+    LOG_DEBUG(Service_FS, " > Is Retail:           {}", acid_header.is_retail ? "YES" : "NO");
+    LOG_DEBUG(Service_FS, "Title ID Min:           0x{:016X}", acid_header.title_id_min);
+    LOG_DEBUG(Service_FS, "Title ID Max:           0x{:016X}", acid_header.title_id_max);
+    LOG_DEBUG(Service_FS, "Filesystem Access:      0x{:016X}\n", acid_file_access.permissions);
 
     // Begin ACI0 printing (actual perms, unsigned)
-    NGLOG_DEBUG(Service_FS, "Magic:                  {:.4}", aci_header.magic.data());
-    NGLOG_DEBUG(Service_FS, "Title ID:               0x{:016X}", aci_header.title_id);
-    NGLOG_DEBUG(Service_FS, "Filesystem Access:      0x{:016X}\n", aci_file_access.permissions);
+    LOG_DEBUG(Service_FS, "Magic:                  {:.4}", aci_header.magic.data());
+    LOG_DEBUG(Service_FS, "Title ID:               0x{:016X}", aci_header.title_id);
+    LOG_DEBUG(Service_FS, "Filesystem Access:      0x{:016X}\n", aci_file_access.permissions);
 }
 } // namespace FileSys

src/core/file_sys/program_metadata.h

@@ -10,6 +10,7 @@
 #include "common/bit_field.h"
 #include "common/common_types.h"
 #include "common/swap.h"
+#include "partition_filesystem.h"
 
 namespace Loader {
 enum class ResultStatus;
@@ -37,8 +38,7 @@ enum class ProgramFilePermission : u64 {
  */
 class ProgramMetadata {
 public:
-    Loader::ResultStatus Load(const std::string& file_path);
-    Loader::ResultStatus Load(const std::vector<u8> file_data, size_t offset = 0);
+    Loader::ResultStatus Load(VirtualFile file);
 
     bool Is64BitProgram() const;
     ProgramAddressSpaceType GetAddressSpaceType() const;
@@ -51,6 +51,7 @@ public:
     void Print() const;
 
 private:
+    // TODO(DarkLordZach): BitField is not trivially copyable.
     struct Header {
         std::array<char, 4> magic;
         std::array<u8, 8> reserved;
@@ -77,6 +78,7 @@ private:
 
     static_assert(sizeof(Header) == 0x80, "NPDM header structure size is wrong");
 
+    // TODO(DarkLordZach): BitField is not trivially copyable.
     struct AcidHeader {
         std::array<u8, 0x100> signature;
         std::array<u8, 0x100> nca_modulus;

src/core/file_sys/romfs_factory.cpp

@@ -1,38 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <algorithm>
-#include <memory>
-#include "common/common_types.h"
-#include "common/logging/log.h"
-#include "core/file_sys/romfs_factory.h"
-#include "core/file_sys/romfs_filesystem.h"
-
-namespace FileSys {
-
-RomFS_Factory::RomFS_Factory(Loader::AppLoader& app_loader) {
-    // Load the RomFS from the app
-    if (Loader::ResultStatus::Success != app_loader.ReadRomFS(romfs_file, data_offset, data_size)) {
-        NGLOG_ERROR(Service_FS, "Unable to read RomFS!");
-    }
-}
-
-ResultVal<std::unique_ptr<FileSystemBackend>> RomFS_Factory::Open(const Path& path) {
-    auto archive = std::make_unique<RomFS_FileSystem>(romfs_file, data_offset, data_size);
-    return MakeResult<std::unique_ptr<FileSystemBackend>>(std::move(archive));
-}
-
-ResultCode RomFS_Factory::Format(const Path& path) {
-    NGLOG_ERROR(Service_FS, "Unimplemented Format archive {}", GetName());
-    // TODO(bunnei): Find the right error code for this
-    return ResultCode(-1);
-}
-
-ResultVal<ArchiveFormatInfo> RomFS_Factory::GetFormatInfo(const Path& path) const {
-    NGLOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
-    // TODO(bunnei): Find the right error code for this
-    return ResultCode(-1);
-}
-
-} // namespace FileSys

src/core/file_sys/romfs_factory.h

@@ -1,35 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include <string>
-#include <vector>
-#include "common/common_types.h"
-#include "core/file_sys/filesystem.h"
-#include "core/hle/result.h"
-#include "core/loader/loader.h"
-
-namespace FileSys {
-
-/// File system interface to the RomFS archive
-class RomFS_Factory final : public FileSystemFactory {
-public:
-    explicit RomFS_Factory(Loader::AppLoader& app_loader);
-
-    std::string GetName() const override {
-        return "ArchiveFactory_RomFS";
-    }
-    ResultVal<std::unique_ptr<FileSystemBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
-
-private:
-    std::shared_ptr<FileUtil::IOFile> romfs_file;
-    u64 data_offset;
-    u64 data_size;
-};
-
-} // namespace FileSys

src/core/file_sys/romfs_filesystem.cpp

@@ -1,112 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <cstring>
-#include <memory>
-#include "common/common_types.h"
-#include "common/logging/log.h"
-#include "core/file_sys/romfs_filesystem.h"
-
-namespace FileSys {
-
-std::string RomFS_FileSystem::GetName() const {
-    return "RomFS";
-}
-
-ResultVal<std::unique_ptr<StorageBackend>> RomFS_FileSystem::OpenFile(const std::string& path,
-                                                                      Mode mode) const {
-    return MakeResult<std::unique_ptr<StorageBackend>>(
-        std::make_unique<RomFS_Storage>(romfs_file, data_offset, data_size));
-}
-
-ResultCode RomFS_FileSystem::DeleteFile(const std::string& path) const {
-    NGLOG_CRITICAL(Service_FS, "Attempted to delete a file from an ROMFS archive ({}).", GetName());
-    // TODO(bunnei): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode RomFS_FileSystem::RenameFile(const std::string& src_path,
-                                        const std::string& dest_path) const {
-    NGLOG_CRITICAL(Service_FS, "Attempted to rename a file within an ROMFS archive ({}).",
-                   GetName());
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode RomFS_FileSystem::DeleteDirectory(const Path& path) const {
-    NGLOG_CRITICAL(Service_FS, "Attempted to delete a directory from an ROMFS archive ({}).",
-                   GetName());
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode RomFS_FileSystem::DeleteDirectoryRecursively(const Path& path) const {
-    NGLOG_CRITICAL(Service_FS, "Attempted to delete a directory from an ROMFS archive ({}).",
-                   GetName());
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode RomFS_FileSystem::CreateFile(const std::string& path, u64 size) const {
-    NGLOG_CRITICAL(Service_FS, "Attempted to create a file in an ROMFS archive ({}).", GetName());
-    // TODO(bunnei): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode RomFS_FileSystem::CreateDirectory(const std::string& path) const {
-    NGLOG_CRITICAL(Service_FS, "Attempted to create a directory in an ROMFS archive ({}).",
-                   GetName());
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultCode RomFS_FileSystem::RenameDirectory(const Path& src_path, const Path& dest_path) const {
-    NGLOG_CRITICAL(Service_FS, "Attempted to rename a file within an ROMFS archive ({}).",
-                   GetName());
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultVal<std::unique_ptr<DirectoryBackend>> RomFS_FileSystem::OpenDirectory(
-    const std::string& path) const {
-    NGLOG_WARNING(Service_FS, "Opening Directory in a ROMFS archive");
-    return MakeResult<std::unique_ptr<DirectoryBackend>>(std::make_unique<ROMFSDirectory>());
-}
-
-u64 RomFS_FileSystem::GetFreeSpaceSize() const {
-    NGLOG_WARNING(Service_FS, "Attempted to get the free space in an ROMFS archive");
-    return 0;
-}
-
-ResultVal<FileSys::EntryType> RomFS_FileSystem::GetEntryType(const std::string& path) const {
-    NGLOG_CRITICAL(Service_FS, "Called within an ROMFS archive (path {}).", path);
-    // TODO(wwylele): Use correct error code
-    return ResultCode(-1);
-}
-
-ResultVal<size_t> RomFS_Storage::Read(const u64 offset, const size_t length, u8* buffer) const {
-    NGLOG_TRACE(Service_FS, "called offset={}, length={}", offset, length);
-    romfs_file->Seek(data_offset + offset, SEEK_SET);
-    size_t read_length = (size_t)std::min((u64)length, data_size - offset);
-
-    return MakeResult<size_t>(romfs_file->ReadBytes(buffer, read_length));
-}
-
-ResultVal<size_t> RomFS_Storage::Write(const u64 offset, const size_t length, const bool flush,
-                                       const u8* buffer) const {
-    NGLOG_ERROR(Service_FS, "Attempted to write to ROMFS file");
-    // TODO(Subv): Find error code
-    return MakeResult<size_t>(0);
-}
-
-u64 RomFS_Storage::GetSize() const {
-    return data_size;
-}
-
-bool RomFS_Storage::SetSize(const u64 size) const {
-    NGLOG_ERROR(Service_FS, "Attempted to set the size of an ROMFS file");
-    return false;
-}
-
-} // namespace FileSys

src/core/file_sys/romfs_filesystem.h

@@ -1,85 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <cstddef>
-#include <memory>
-#include <string>
-#include <vector>
-#include "common/common_types.h"
-#include "common/file_util.h"
-#include "core/file_sys/directory.h"
-#include "core/file_sys/filesystem.h"
-#include "core/file_sys/storage.h"
-#include "core/hle/result.h"
-
-namespace FileSys {
-
-/**
- * Helper which implements an interface to deal with Switch .istorage ROMFS images used in some
- * archives This should be subclassed by concrete archive types, which will provide the input data
- * (load the raw ROMFS archive) and override any required methods
- */
-class RomFS_FileSystem : public FileSystemBackend {
-public:
-    RomFS_FileSystem(std::shared_ptr<FileUtil::IOFile> file, u64 offset, u64 size)
-        : romfs_file(file), data_offset(offset), data_size(size) {}
-
-    std::string GetName() const override;
-
-    ResultVal<std::unique_ptr<StorageBackend>> OpenFile(const std::string& path,
-                                                        Mode mode) const override;
-    ResultCode DeleteFile(const std::string& path) const override;
-    ResultCode RenameFile(const std::string& src_path, const std::string& dest_path) const override;
-    ResultCode DeleteDirectory(const Path& path) const override;
-    ResultCode DeleteDirectoryRecursively(const Path& path) const override;
-    ResultCode CreateFile(const std::string& path, u64 size) const override;
-    ResultCode CreateDirectory(const std::string& path) const override;
-    ResultCode RenameDirectory(const Path& src_path, const Path& dest_path) const override;
-    ResultVal<std::unique_ptr<DirectoryBackend>> OpenDirectory(
-        const std::string& path) const override;
-    u64 GetFreeSpaceSize() const override;
-    ResultVal<EntryType> GetEntryType(const std::string& path) const override;
-
-protected:
-    std::shared_ptr<FileUtil::IOFile> romfs_file;
-    u64 data_offset;
-    u64 data_size;
-};
-
-class RomFS_Storage : public StorageBackend {
-public:
-    RomFS_Storage(std::shared_ptr<FileUtil::IOFile> file, u64 offset, u64 size)
-        : romfs_file(file), data_offset(offset), data_size(size) {}
-
-    ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override;
-    ResultVal<size_t> Write(u64 offset, size_t length, bool flush, const u8* buffer) const override;
-    u64 GetSize() const override;
-    bool SetSize(u64 size) const override;
-    bool Close() const override {
-        return false;
-    }
-    void Flush() const override {}
-
-private:
-    std::shared_ptr<FileUtil::IOFile> romfs_file;
-    u64 data_offset;
-    u64 data_size;
-};
-
-class ROMFSDirectory : public DirectoryBackend {
-public:
-    u64 Read(const u64 count, Entry* entries) override {
-        return 0;
-    }
-    u64 GetEntryCount() const override {
-        return 0;
-    }
-    bool Close() const override {
-        return false;
-    }
-};
-
-} // namespace FileSys

src/core/file_sys/savedata_factory.cpp

@@ -1,54 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <memory>
-#include "common/common_types.h"
-#include "common/logging/log.h"
-#include "core/core.h"
-#include "core/file_sys/disk_filesystem.h"
-#include "core/file_sys/savedata_factory.h"
-#include "core/hle/kernel/process.h"
-
-namespace FileSys {
-
-SaveData_Factory::SaveData_Factory(std::string nand_directory)
-    : nand_directory(std::move(nand_directory)) {}
-
-ResultVal<std::unique_ptr<FileSystemBackend>> SaveData_Factory::Open(const Path& path) {
-    std::string save_directory = GetFullPath();
-    // Return an error if the save data doesn't actually exist.
-    if (!FileUtil::IsDirectory(save_directory)) {
-        // TODO(Subv): Find out correct error code.
-        return ResultCode(-1);
-    }
-
-    auto archive = std::make_unique<Disk_FileSystem>(save_directory);
-    return MakeResult<std::unique_ptr<FileSystemBackend>>(std::move(archive));
-}
-
-ResultCode SaveData_Factory::Format(const Path& path) {
-    NGLOG_WARNING(Service_FS, "Format archive {}", GetName());
-    // Create the save data directory.
-    if (!FileUtil::CreateFullPath(GetFullPath())) {
-        // TODO(Subv): Find the correct error code.
-        return ResultCode(-1);
-    }
-
-    return RESULT_SUCCESS;
-}
-
-ResultVal<ArchiveFormatInfo> SaveData_Factory::GetFormatInfo(const Path& path) const {
-    NGLOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
-    // TODO(bunnei): Find the right error code for this
-    return ResultCode(-1);
-}
-
-std::string SaveData_Factory::GetFullPath() const {
-    u64 title_id = Core::CurrentProcess()->program_id;
-    // TODO(Subv): Somehow obtain this value.
-    u32 user = 0;
-    return fmt::format("{}save/{:016X}/{:08X}/", nand_directory, title_id, user);
-}
-
-} // namespace FileSys

src/core/file_sys/savedata_factory.h

@@ -1,33 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include <string>
-#include "common/common_types.h"
-#include "core/file_sys/filesystem.h"
-#include "core/hle/result.h"
-
-namespace FileSys {
-
-/// File system interface to the SaveData archive
-class SaveData_Factory final : public FileSystemFactory {
-public:
-    explicit SaveData_Factory(std::string nand_directory);
-
-    std::string GetName() const override {
-        return "SaveData_Factory";
-    }
-    ResultVal<std::unique_ptr<FileSystemBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
-
-private:
-    std::string nand_directory;
-
-    std::string GetFullPath() const;
-};
-
-} // namespace FileSys

src/core/file_sys/sdmc_factory.cpp

@@ -1,39 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <memory>
-#include "common/common_types.h"
-#include "common/logging/log.h"
-#include "common/string_util.h"
-#include "core/core.h"
-#include "core/file_sys/disk_filesystem.h"
-#include "core/file_sys/sdmc_factory.h"
-
-namespace FileSys {
-
-SDMC_Factory::SDMC_Factory(std::string sd_directory) : sd_directory(std::move(sd_directory)) {}
-
-ResultVal<std::unique_ptr<FileSystemBackend>> SDMC_Factory::Open(const Path& path) {
-    // Create the SD Card directory if it doesn't already exist.
-    if (!FileUtil::IsDirectory(sd_directory)) {
-        FileUtil::CreateFullPath(sd_directory);
-    }
-
-    auto archive = std::make_unique<Disk_FileSystem>(sd_directory);
-    return MakeResult<std::unique_ptr<FileSystemBackend>>(std::move(archive));
-}
-
-ResultCode SDMC_Factory::Format(const Path& path) {
-    NGLOG_ERROR(Service_FS, "Unimplemented Format archive {}", GetName());
-    // TODO(Subv): Find the right error code for this
-    return ResultCode(-1);
-}
-
-ResultVal<ArchiveFormatInfo> SDMC_Factory::GetFormatInfo(const Path& path) const {
-    NGLOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
-    // TODO(bunnei): Find the right error code for this
-    return ResultCode(-1);
-}
-
-} // namespace FileSys

src/core/file_sys/sdmc_factory.h

@@ -1,31 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include <string>
-#include "common/common_types.h"
-#include "core/file_sys/filesystem.h"
-#include "core/hle/result.h"
-
-namespace FileSys {
-
-/// File system interface to the SDCard archive
-class SDMC_Factory final : public FileSystemFactory {
-public:
-    explicit SDMC_Factory(std::string sd_directory);
-
-    std::string GetName() const override {
-        return "SDMC_Factory";
-    }
-    ResultVal<std::unique_ptr<FileSystemBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
-
-private:
-    std::string sd_directory;
-};
-
-} // namespace FileSys

src/core/file_sys/vfs.cpp

@@ -0,0 +1,187 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <numeric>
+#include "common/file_util.h"
+#include "core/file_sys/vfs.h"
+
+namespace FileSys {
+
+VfsFile::~VfsFile() = default;
+
+std::string VfsFile::GetExtension() const {
+    return FileUtil::GetExtensionFromFilename(GetName());
+}
+
+VfsDirectory::~VfsDirectory() = default;
+
+boost::optional<u8> VfsFile::ReadByte(size_t offset) const {
+    u8 out{};
+    size_t size = Read(&out, 1, offset);
+    if (size == 1)
+        return out;
+
+    return boost::none;
+}
+
+std::vector<u8> VfsFile::ReadBytes(size_t size, size_t offset) const {
+    std::vector<u8> out(size);
+    size_t read_size = Read(out.data(), size, offset);
+    out.resize(read_size);
+    return out;
+}
+
+std::vector<u8> VfsFile::ReadAllBytes() const {
+    return ReadBytes(GetSize());
+}
+
+bool VfsFile::WriteByte(u8 data, size_t offset) {
+    return Write(&data, 1, offset) == 1;
+}
+
+size_t VfsFile::WriteBytes(std::vector<u8> data, size_t offset) {
+    return Write(data.data(), data.size(), offset);
+}
+
+std::shared_ptr<VfsFile> VfsDirectory::GetFileRelative(const std::string& path) const {
+    auto vec = FileUtil::SplitPathComponents(path);
+    vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
+              vec.end());
+    if (vec.empty())
+        return nullptr;
+    if (vec.size() == 1)
+        return GetFile(vec[0]);
+    auto dir = GetSubdirectory(vec[0]);
+    for (size_t i = 1; i < vec.size() - 1; ++i) {
+        if (dir == nullptr)
+            return nullptr;
+        dir = dir->GetSubdirectory(vec[i]);
+    }
+    if (dir == nullptr)
+        return nullptr;
+    return dir->GetFile(vec.back());
+}
+
+std::shared_ptr<VfsFile> VfsDirectory::GetFileAbsolute(const std::string& path) const {
+    if (IsRoot())
+        return GetFileRelative(path);
+
+    return GetParentDirectory()->GetFileAbsolute(path);
+}
+
+std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryRelative(const std::string& path) const {
+    auto vec = FileUtil::SplitPathComponents(path);
+    vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
+              vec.end());
+    if (vec.empty())
+        // return std::shared_ptr<VfsDirectory>(this);
+        return nullptr;
+    auto dir = GetSubdirectory(vec[0]);
+    for (size_t i = 1; i < vec.size(); ++i) {
+        dir = dir->GetSubdirectory(vec[i]);
+    }
+    return dir;
+}
+
+std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryAbsolute(const std::string& path) const {
+    if (IsRoot())
+        return GetDirectoryRelative(path);
+
+    return GetParentDirectory()->GetDirectoryAbsolute(path);
+}
+
+std::shared_ptr<VfsFile> VfsDirectory::GetFile(const std::string& name) const {
+    const auto& files = GetFiles();
+    const auto iter = std::find_if(files.begin(), files.end(),
+                                   [&name](const auto& file1) { return name == file1->GetName(); });
+    return iter == files.end() ? nullptr : *iter;
+}
+
+std::shared_ptr<VfsDirectory> VfsDirectory::GetSubdirectory(const std::string& name) const {
+    const auto& subs = GetSubdirectories();
+    const auto iter = std::find_if(subs.begin(), subs.end(),
+                                   [&name](const auto& file1) { return name == file1->GetName(); });
+    return iter == subs.end() ? nullptr : *iter;
+}
+
+bool VfsDirectory::IsRoot() const {
+    return GetParentDirectory() == nullptr;
+}
+
+size_t VfsDirectory::GetSize() const {
+    const auto& files = GetFiles();
+    const auto file_total =
+        std::accumulate(files.begin(), files.end(), 0ull,
+                        [](const auto& f1, const auto& f2) { return f1 + f2->GetSize(); });
+
+    const auto& sub_dir = GetSubdirectories();
+    const auto subdir_total =
+        std::accumulate(sub_dir.begin(), sub_dir.end(), 0ull,
+                        [](const auto& f1, const auto& f2) { return f1 + f2->GetSize(); });
+
+    return file_total + subdir_total;
+}
+
+bool VfsDirectory::DeleteSubdirectoryRecursive(const std::string& name) {
+    auto dir = GetSubdirectory(name);
+    if (dir == nullptr)
+        return false;
+
+    bool success = true;
+    for (const auto& file : dir->GetFiles()) {
+        if (!DeleteFile(file->GetName()))
+            success = false;
+    }
+
+    for (const auto& sdir : dir->GetSubdirectories()) {
+        if (!dir->DeleteSubdirectoryRecursive(sdir->GetName()))
+            success = false;
+    }
+
+    return success;
+}
+
+bool VfsDirectory::Copy(const std::string& src, const std::string& dest) {
+    const auto f1 = GetFile(src);
+    auto f2 = CreateFile(dest);
+    if (f1 == nullptr || f2 == nullptr)
+        return false;
+
+    if (!f2->Resize(f1->GetSize())) {
+        DeleteFile(dest);
+        return false;
+    }
+
+    return f2->WriteBytes(f1->ReadAllBytes()) == f1->GetSize();
+}
+
+bool ReadOnlyVfsDirectory::IsWritable() const {
+    return false;
+}
+
+bool ReadOnlyVfsDirectory::IsReadable() const {
+    return true;
+}
+
+std::shared_ptr<VfsDirectory> ReadOnlyVfsDirectory::CreateSubdirectory(const std::string& name) {
+    return nullptr;
+}
+
+std::shared_ptr<VfsFile> ReadOnlyVfsDirectory::CreateFile(const std::string& name) {
+    return nullptr;
+}
+
+bool ReadOnlyVfsDirectory::DeleteSubdirectory(const std::string& name) {
+    return false;
+}
+
+bool ReadOnlyVfsDirectory::DeleteFile(const std::string& name) {
+    return false;
+}
+
+bool ReadOnlyVfsDirectory::Rename(const std::string& name) {
+    return false;
+}
+} // namespace FileSys

src/core/file_sys/vfs.h

@@ -0,0 +1,220 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <string>
+#include <type_traits>
+#include <vector>
+#include "boost/optional.hpp"
+#include "common/common_types.h"
+#include "common/file_util.h"
+
+namespace FileSys {
+struct VfsFile;
+struct VfsDirectory;
+
+// Convenience typedefs to use VfsDirectory and VfsFile
+using VirtualDir = std::shared_ptr<FileSys::VfsDirectory>;
+using VirtualFile = std::shared_ptr<FileSys::VfsFile>;
+
+// A class representing a file in an abstract filesystem.
+struct VfsFile : NonCopyable {
+    virtual ~VfsFile();
+
+    // Retrieves the file name.
+    virtual std::string GetName() const = 0;
+    // Retrieves the extension of the file name.
+    virtual std::string GetExtension() const;
+    // Retrieves the size of the file.
+    virtual size_t GetSize() const = 0;
+    // Resizes the file to new_size. Returns whether or not the operation was successful.
+    virtual bool Resize(size_t new_size) = 0;
+    // Gets a pointer to the directory containing this file, returning nullptr if there is none.
+    virtual std::shared_ptr<VfsDirectory> GetContainingDirectory() const = 0;
+
+    // Returns whether or not the file can be written to.
+    virtual bool IsWritable() const = 0;
+    // Returns whether or not the file can be read from.
+    virtual bool IsReadable() const = 0;
+
+    // The primary method of reading from the file. Reads length bytes into data starting at offset
+    // into file. Returns number of bytes successfully read.
+    virtual size_t Read(u8* data, size_t length, size_t offset = 0) const = 0;
+    // The primary method of writing to the file. Writes length bytes from data starting at offset
+    // into file. Returns number of bytes successfully written.
+    virtual size_t Write(const u8* data, size_t length, size_t offset = 0) = 0;
+
+    // Reads exactly one byte at the offset provided, returning boost::none on error.
+    virtual boost::optional<u8> ReadByte(size_t offset = 0) const;
+    // Reads size bytes starting at offset in file into a vector.
+    virtual std::vector<u8> ReadBytes(size_t size, size_t offset = 0) const;
+    // Reads all the bytes from the file into a vector. Equivalent to 'file->Read(file->GetSize(),
+    // 0)'
+    virtual std::vector<u8> ReadAllBytes() const;
+
+    // Reads an array of type T, size number_elements starting at offset.
+    // Returns the number of bytes (sizeof(T)*number_elements) read successfully.
+    template <typename T>
+    size_t ReadArray(T* data, size_t number_elements, size_t offset = 0) const {
+        static_assert(std::is_trivially_copyable<T>::value,
+                      "Data type must be trivially copyable.");
+
+        return Read(reinterpret_cast<u8*>(data), number_elements * sizeof(T), offset);
+    }
+
+    // Reads size bytes into the memory starting at data starting at offset into the file.
+    // Returns the number of bytes read successfully.
+    template <typename T>
+    size_t ReadBytes(T* data, size_t size, size_t offset = 0) const {
+        static_assert(std::is_trivially_copyable<T>::value,
+                      "Data type must be trivially copyable.");
+        return Read(reinterpret_cast<u8*>(data), size, offset);
+    }
+
+    // Reads one object of type T starting at offset in file.
+    // Returns the number of bytes read successfully (sizeof(T)).
+    template <typename T>
+    size_t ReadObject(T* data, size_t offset = 0) const {
+        static_assert(std::is_trivially_copyable<T>::value,
+                      "Data type must be trivially copyable.");
+        return Read(reinterpret_cast<u8*>(data), sizeof(T), offset);
+    }
+
+    // Writes exactly one byte to offset in file and retuns whether or not the byte was written
+    // successfully.
+    virtual bool WriteByte(u8 data, size_t offset = 0);
+    // Writes a vector of bytes to offset in file and returns the number of bytes successfully
+    // written.
+    virtual size_t WriteBytes(std::vector<u8> data, size_t offset = 0);
+
+    // Writes an array of type T, size number_elements to offset in file.
+    // Returns the number of bytes (sizeof(T)*number_elements) written successfully.
+    template <typename T>
+    size_t WriteArray(T* data, size_t number_elements, size_t offset = 0) {
+        static_assert(std::is_trivially_copyable<T>::value,
+                      "Data type must be trivially copyable.");
+
+        return Write(data, number_elements * sizeof(T), offset);
+    }
+
+    // Writes size bytes starting at memory location data to offset in file.
+    // Returns the number of bytes written successfully.
+    template <typename T>
+    size_t WriteBytes(T* data, size_t size, size_t offset = 0) {
+        static_assert(std::is_trivially_copyable<T>::value,
+                      "Data type must be trivially copyable.");
+        return Write(reinterpret_cast<u8*>(data), size, offset);
+    }
+
+    // Writes one object of type T to offset in file.
+    // Returns the number of bytes written successfully (sizeof(T)).
+    template <typename T>
+    size_t WriteObject(const T& data, size_t offset = 0) {
+        static_assert(std::is_trivially_copyable<T>::value,
+                      "Data type must be trivially copyable.");
+        return Write(&data, sizeof(T), offset);
+    }
+
+    // Renames the file to name. Returns whether or not the operation was successsful.
+    virtual bool Rename(const std::string& name) = 0;
+};
+
+// A class representing a directory in an abstract filesystem.
+struct VfsDirectory : NonCopyable {
+    virtual ~VfsDirectory();
+
+    // Retrives the file located at path as if the current directory was root. Returns nullptr if
+    // not found.
+    virtual std::shared_ptr<VfsFile> GetFileRelative(const std::string& path) const;
+    // Calls GetFileRelative(path) on the root of the current directory.
+    virtual std::shared_ptr<VfsFile> GetFileAbsolute(const std::string& path) const;
+
+    // Retrives the directory located at path as if the current directory was root. Returns nullptr
+    // if not found.
+    virtual std::shared_ptr<VfsDirectory> GetDirectoryRelative(const std::string& path) const;
+    // Calls GetDirectoryRelative(path) on the root of the current directory.
+    virtual std::shared_ptr<VfsDirectory> GetDirectoryAbsolute(const std::string& path) const;
+
+    // Returns a vector containing all of the files in this directory.
+    virtual std::vector<std::shared_ptr<VfsFile>> GetFiles() const = 0;
+    // Returns the file with filename matching name. Returns nullptr if directory dosen't have a
+    // file with name.
+    virtual std::shared_ptr<VfsFile> GetFile(const std::string& name) const;
+
+    // Returns a vector containing all of the subdirectories in this directory.
+    virtual std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const = 0;
+    // Returns the directory with name matching name. Returns nullptr if directory dosen't have a
+    // directory with name.
+    virtual std::shared_ptr<VfsDirectory> GetSubdirectory(const std::string& name) const;
+
+    // Returns whether or not the directory can be written to.
+    virtual bool IsWritable() const = 0;
+    // Returns whether of not the directory can be read from.
+    virtual bool IsReadable() const = 0;
+
+    // Returns whether or not the directory is the root of the current file tree.
+    virtual bool IsRoot() const;
+
+    // Returns the name of the directory.
+    virtual std::string GetName() const = 0;
+    // Returns the total size of all files and subdirectories in this directory.
+    virtual size_t GetSize() const;
+    // Returns the parent directory of this directory. Returns nullptr if this directory is root or
+    // has no parent.
+    virtual std::shared_ptr<VfsDirectory> GetParentDirectory() const = 0;
+
+    // Creates a new subdirectory with name name. Returns a pointer to the new directory or nullptr
+    // if the operation failed.
+    virtual std::shared_ptr<VfsDirectory> CreateSubdirectory(const std::string& name) = 0;
+    // Creates a new file with name name. Returns a pointer to the new file or nullptr if the
+    // operation failed.
+    virtual std::shared_ptr<VfsFile> CreateFile(const std::string& name) = 0;
+
+    // Deletes the subdirectory with name and returns true on success.
+    virtual bool DeleteSubdirectory(const std::string& name) = 0;
+    // Deletes all subdirectories and files of subdirectory with name recirsively and then deletes
+    // the subdirectory. Returns true on success.
+    virtual bool DeleteSubdirectoryRecursive(const std::string& name);
+    // Returnes whether or not the file with name name was deleted successfully.
+    virtual bool DeleteFile(const std::string& name) = 0;
+
+    // Returns whether or not this directory was renamed to name.
+    virtual bool Rename(const std::string& name) = 0;
+
+    // Returns whether or not the file with name src was successfully copied to a new file with name
+    // dest.
+    virtual bool Copy(const std::string& src, const std::string& dest);
+
+    // Interprets the file with name file instead as a directory of type directory.
+    // The directory must have a constructor that takes a single argument of type
+    // std::shared_ptr<VfsFile>. Allows to reinterpret container files (i.e NCA, zip, XCI, etc) as a
+    // subdirectory in one call.
+    template <typename Directory>
+    bool InterpretAsDirectory(const std::string& file) {
+        auto file_p = GetFile(file);
+        if (file_p == nullptr)
+            return false;
+        return ReplaceFileWithSubdirectory(file, std::make_shared<Directory>(file_p));
+    }
+
+protected:
+    // Backend for InterpretAsDirectory.
+    // Removes all references to file and adds a reference to dir in the directory's implementation.
+    virtual bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) = 0;
+};
+
+// A convenience partial-implementation of VfsDirectory that stubs out methods that should only work
+// if writable. This is to avoid redundant empty methods everywhere.
+struct ReadOnlyVfsDirectory : public VfsDirectory {
+    bool IsWritable() const override;
+    bool IsReadable() const override;
+    std::shared_ptr<VfsDirectory> CreateSubdirectory(const std::string& name) override;
+    std::shared_ptr<VfsFile> CreateFile(const std::string& name) override;
+    bool DeleteSubdirectory(const std::string& name) override;
+    bool DeleteFile(const std::string& name) override;
+    bool Rename(const std::string& name) override;
+};
+} // namespace FileSys

src/core/file_sys/vfs_offset.cpp

@@ -0,0 +1,92 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/file_sys/vfs_offset.h"
+
+namespace FileSys {
+
+OffsetVfsFile::OffsetVfsFile(std::shared_ptr<VfsFile> file_, size_t size_, size_t offset_,
+                             const std::string& name_)
+    : file(file_), offset(offset_), size(size_), name(name_) {}
+
+std::string OffsetVfsFile::GetName() const {
+    return name.empty() ? file->GetName() : name;
+}
+
+size_t OffsetVfsFile::GetSize() const {
+    return size;
+}
+
+bool OffsetVfsFile::Resize(size_t new_size) {
+    if (offset + new_size < file->GetSize()) {
+        size = new_size;
+    } else {
+        auto res = file->Resize(offset + new_size);
+        if (!res)
+            return false;
+        size = new_size;
+    }
+
+    return true;
+}
+
+std::shared_ptr<VfsDirectory> OffsetVfsFile::GetContainingDirectory() const {
+    return file->GetContainingDirectory();
+}
+
+bool OffsetVfsFile::IsWritable() const {
+    return file->IsWritable();
+}
+
+bool OffsetVfsFile::IsReadable() const {
+    return file->IsReadable();
+}
+
+size_t OffsetVfsFile::Read(u8* data, size_t length, size_t r_offset) const {
+    return file->Read(data, TrimToFit(length, r_offset), offset + r_offset);
+}
+
+size_t OffsetVfsFile::Write(const u8* data, size_t length, size_t r_offset) {
+    return file->Write(data, TrimToFit(length, r_offset), offset + r_offset);
+}
+
+boost::optional<u8> OffsetVfsFile::ReadByte(size_t r_offset) const {
+    if (r_offset < size)
+        return file->ReadByte(offset + r_offset);
+
+    return boost::none;
+}
+
+std::vector<u8> OffsetVfsFile::ReadBytes(size_t r_size, size_t r_offset) const {
+    return file->ReadBytes(TrimToFit(r_size, r_offset), offset + r_offset);
+}
+
+std::vector<u8> OffsetVfsFile::ReadAllBytes() const {
+    return file->ReadBytes(size, offset);
+}
+
+bool OffsetVfsFile::WriteByte(u8 data, size_t r_offset) {
+    if (r_offset < size)
+        return file->WriteByte(data, offset + r_offset);
+
+    return false;
+}
+
+size_t OffsetVfsFile::WriteBytes(std::vector<u8> data, size_t r_offset) {
+    return file->Write(data.data(), TrimToFit(data.size(), r_offset), offset + r_offset);
+}
+
+bool OffsetVfsFile::Rename(const std::string& name) {
+    return file->Rename(name);
+}
+
+size_t OffsetVfsFile::GetOffset() const {
+    return offset;
+}
+
+size_t OffsetVfsFile::TrimToFit(size_t r_size, size_t r_offset) const {
+    return std::max<size_t>(std::min<size_t>(size - r_offset, r_size), 0);
+}
+
+} // namespace FileSys

src/core/file_sys/vfs_offset.h

@@ -0,0 +1,46 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/file_sys/vfs.h"
+
+namespace FileSys {
+
+// An implementation of VfsFile that wraps around another VfsFile at a certain offset.
+// Similar to seeking to an offset.
+// If the file is writable, operations that would write past the end of the offset file will expand
+// the size of this wrapper.
+struct OffsetVfsFile : public VfsFile {
+    OffsetVfsFile(std::shared_ptr<VfsFile> file, size_t size, size_t offset = 0,
+                  const std::string& new_name = "");
+
+    std::string GetName() const override;
+    size_t GetSize() const override;
+    bool Resize(size_t new_size) override;
+    std::shared_ptr<VfsDirectory> GetContainingDirectory() const override;
+    bool IsWritable() const override;
+    bool IsReadable() const override;
+    size_t Read(u8* data, size_t length, size_t offset) const override;
+    size_t Write(const u8* data, size_t length, size_t offset) override;
+    boost::optional<u8> ReadByte(size_t offset) const override;
+    std::vector<u8> ReadBytes(size_t size, size_t offset) const override;
+    std::vector<u8> ReadAllBytes() const override;
+    bool WriteByte(u8 data, size_t offset) override;
+    size_t WriteBytes(std::vector<u8> data, size_t offset) override;
+
+    bool Rename(const std::string& name) override;
+
+    size_t GetOffset() const;
+
+private:
+    size_t TrimToFit(size_t r_size, size_t r_offset) const;
+
+    std::shared_ptr<VfsFile> file;
+    size_t offset;
+    size_t size;
+    std::string name;
+};
+
+} // namespace FileSys

src/core/file_sys/vfs_real.cpp

@@ -0,0 +1,168 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/common_paths.h"
+#include "common/logging/log.h"
+#include "core/file_sys/vfs_real.h"
+
+namespace FileSys {
+
+static std::string PermissionsToCharArray(Mode perms) {
+    std::string out;
+    switch (perms) {
+    case Mode::Read:
+        out += "r";
+        break;
+    case Mode::Write:
+        out += "r+";
+        break;
+    case Mode::Append:
+        out += "a";
+        break;
+    }
+    return out + "b";
+}
+
+RealVfsFile::RealVfsFile(const std::string& path_, Mode perms_)
+    : backing(path_, PermissionsToCharArray(perms_).c_str()), path(path_),
+      parent_path(FileUtil::GetParentPath(path_)),
+      path_components(FileUtil::SplitPathComponents(path_)),
+      parent_components(FileUtil::SliceVector(path_components, 0, path_components.size() - 1)),
+      perms(perms_) {}
+
+std::string RealVfsFile::GetName() const {
+    return path_components.back();
+}
+
+size_t RealVfsFile::GetSize() const {
+    return backing.GetSize();
+}
+
+bool RealVfsFile::Resize(size_t new_size) {
+    return backing.Resize(new_size);
+}
+
+std::shared_ptr<VfsDirectory> RealVfsFile::GetContainingDirectory() const {
+    return std::make_shared<RealVfsDirectory>(parent_path, perms);
+}
+
+bool RealVfsFile::IsWritable() const {
+    return perms == Mode::Append || perms == Mode::Write;
+}
+
+bool RealVfsFile::IsReadable() const {
+    return perms == Mode::Read || perms == Mode::Write;
+}
+
+size_t RealVfsFile::Read(u8* data, size_t length, size_t offset) const {
+    if (!backing.Seek(offset, SEEK_SET))
+        return 0;
+    return backing.ReadBytes(data, length);
+}
+
+size_t RealVfsFile::Write(const u8* data, size_t length, size_t offset) {
+    if (!backing.Seek(offset, SEEK_SET))
+        return 0;
+    return backing.WriteBytes(data, length);
+}
+
+bool RealVfsFile::Rename(const std::string& name) {
+    const auto out = FileUtil::Rename(GetName(), name);
+    path = parent_path + DIR_SEP + name;
+    path_components = parent_components;
+    path_components.push_back(name);
+    backing = FileUtil::IOFile(path, PermissionsToCharArray(perms).c_str());
+    return out;
+}
+
+RealVfsDirectory::RealVfsDirectory(const std::string& path_, Mode perms_)
+    : path(FileUtil::RemoveTrailingSlash(path_)), parent_path(FileUtil::GetParentPath(path)),
+      path_components(FileUtil::SplitPathComponents(path)),
+      parent_components(FileUtil::SliceVector(path_components, 0, path_components.size() - 1)),
+      perms(perms_) {
+    if (!FileUtil::Exists(path) && (perms == Mode::Write || perms == Mode::Append))
+        FileUtil::CreateDir(path);
+    unsigned size;
+    if (perms != Mode::Append) {
+        FileUtil::ForeachDirectoryEntry(
+            &size, path,
+            [this](unsigned* entries_out, const std::string& directory,
+                   const std::string& filename) {
+                std::string full_path = directory + DIR_SEP + filename;
+                if (FileUtil::IsDirectory(full_path))
+                    subdirectories.emplace_back(
+                        std::make_shared<RealVfsDirectory>(full_path, perms));
+                else
+                    files.emplace_back(std::make_shared<RealVfsFile>(full_path, perms));
+                return true;
+            });
+    }
+}
+
+std::vector<std::shared_ptr<VfsFile>> RealVfsDirectory::GetFiles() const {
+    return std::vector<std::shared_ptr<VfsFile>>(files);
+}
+
+std::vector<std::shared_ptr<VfsDirectory>> RealVfsDirectory::GetSubdirectories() const {
+    return std::vector<std::shared_ptr<VfsDirectory>>(subdirectories);
+}
+
+bool RealVfsDirectory::IsWritable() const {
+    return perms == Mode::Write || perms == Mode::Append;
+}
+
+bool RealVfsDirectory::IsReadable() const {
+    return perms == Mode::Read || perms == Mode::Write;
+}
+
+std::string RealVfsDirectory::GetName() const {
+    return path_components.back();
+}
+
+std::shared_ptr<VfsDirectory> RealVfsDirectory::GetParentDirectory() const {
+    if (path_components.size() <= 1)
+        return nullptr;
+
+    return std::make_shared<RealVfsDirectory>(parent_path, perms);
+}
+
+std::shared_ptr<VfsDirectory> RealVfsDirectory::CreateSubdirectory(const std::string& name) {
+    if (!FileUtil::CreateDir(path + DIR_SEP + name))
+        return nullptr;
+    subdirectories.emplace_back(std::make_shared<RealVfsDirectory>(path + DIR_SEP + name, perms));
+    return subdirectories.back();
+}
+
+std::shared_ptr<VfsFile> RealVfsDirectory::CreateFile(const std::string& name) {
+    if (!FileUtil::CreateEmptyFile(path + DIR_SEP + name))
+        return nullptr;
+    files.emplace_back(std::make_shared<RealVfsFile>(path + DIR_SEP + name, perms));
+    return files.back();
+}
+
+bool RealVfsDirectory::DeleteSubdirectory(const std::string& name) {
+    return FileUtil::DeleteDirRecursively(path + DIR_SEP + name);
+}
+
+bool RealVfsDirectory::DeleteFile(const std::string& name) {
+    return FileUtil::Delete(path + DIR_SEP + name);
+}
+
+bool RealVfsDirectory::Rename(const std::string& name) {
+    return FileUtil::Rename(path, parent_path + DIR_SEP + name);
+}
+
+bool RealVfsDirectory::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
+    auto iter = std::find(files.begin(), files.end(), file);
+    if (iter == files.end())
+        return false;
+
+    files[iter - files.begin()] = files.back();
+    files.pop_back();
+
+    subdirectories.emplace_back(dir);
+
+    return true;
+}
+} // namespace FileSys

src/core/file_sys/vfs_real.h

@@ -0,0 +1,65 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/file_util.h"
+#include "core/file_sys/filesystem.h"
+#include "core/file_sys/vfs.h"
+
+namespace FileSys {
+
+// An implmentation of VfsFile that represents a file on the user's computer.
+struct RealVfsFile : public VfsFile {
+    RealVfsFile(const std::string& name, Mode perms = Mode::Read);
+
+    std::string GetName() const override;
+    size_t GetSize() const override;
+    bool Resize(size_t new_size) override;
+    std::shared_ptr<VfsDirectory> GetContainingDirectory() const override;
+    bool IsWritable() const override;
+    bool IsReadable() const override;
+    size_t Read(u8* data, size_t length, size_t offset) const override;
+    size_t Write(const u8* data, size_t length, size_t offset) override;
+    bool Rename(const std::string& name) override;
+
+private:
+    FileUtil::IOFile backing;
+    std::string path;
+    std::string parent_path;
+    std::vector<std::string> path_components;
+    std::vector<std::string> parent_components;
+    Mode perms;
+};
+
+// An implementation of VfsDirectory that represents a directory on the user's computer.
+struct RealVfsDirectory : public VfsDirectory {
+    RealVfsDirectory(const std::string& path, Mode perms);
+
+    std::vector<std::shared_ptr<VfsFile>> GetFiles() const override;
+    std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const override;
+    bool IsWritable() const override;
+    bool IsReadable() const override;
+    std::string GetName() const override;
+    std::shared_ptr<VfsDirectory> GetParentDirectory() const override;
+    std::shared_ptr<VfsDirectory> CreateSubdirectory(const std::string& name) override;
+    std::shared_ptr<VfsFile> CreateFile(const std::string& name) override;
+    bool DeleteSubdirectory(const std::string& name) override;
+    bool DeleteFile(const std::string& name) override;
+    bool Rename(const std::string& name) override;
+
+protected:
+    bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;
+
+private:
+    std::string path;
+    std::string parent_path;
+    std::vector<std::string> path_components;
+    std::vector<std::string> parent_components;
+    Mode perms;
+    std::vector<std::shared_ptr<VfsFile>> files;
+    std::vector<std::shared_ptr<VfsDirectory>> subdirectories;
+};
+
+} // namespace FileSys

src/core/frontend/input.h

@@ -59,7 +59,7 @@ template <typename InputDeviceType>
 void RegisterFactory(const std::string& name, std::shared_ptr<Factory<InputDeviceType>> factory) {
     auto pair = std::make_pair(name, std::move(factory));
     if (!Impl::FactoryList<InputDeviceType>::list.insert(std::move(pair)).second) {
-        NGLOG_ERROR(Input, "Factory '{}' already registered", name);
+        LOG_ERROR(Input, "Factory '{}' already registered", name);
     }
 }
 
@@ -71,7 +71,7 @@ void RegisterFactory(const std::string& name, std::shared_ptr<Factory<InputDevic
 template <typename InputDeviceType>
 void UnregisterFactory(const std::string& name) {
     if (Impl::FactoryList<InputDeviceType>::list.erase(name) == 0) {
-        NGLOG_ERROR(Input, "Factory '{}' not registered", name);
+        LOG_ERROR(Input, "Factory '{}' not registered", name);
     }
 }
 
@@ -88,7 +88,7 @@ std::unique_ptr<InputDeviceType> CreateDevice(const std::string& params) {
     const auto pair = factory_list.find(engine);
     if (pair == factory_list.end()) {
         if (engine != "null") {
-            NGLOG_ERROR(Input, "Unknown engine name: {}", engine);
+            LOG_ERROR(Input, "Unknown engine name: {}", engine);
         }
         return std::make_unique<InputDeviceType>();
     }

src/core/gdbstub/gdbstub.cpp

@@ -32,9 +32,13 @@
 
 #include "common/logging/log.h"
 #include "common/string_util.h"
+#include "common/swap.h"
 #include "core/arm/arm_interface.h"
 #include "core/core.h"
+#include "core/core_cpu.h"
 #include "core/gdbstub/gdbstub.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/scheduler.h"
 #include "core/loader/loader.h"
 #include "core/memory.h"
 
@@ -137,15 +141,17 @@ static u8 command_buffer[GDB_BUFFER_SIZE];
 static u32 command_length;
 
 static u32 latest_signal = 0;
-static bool step_break = false;
 static bool memory_break = false;
 
+static Kernel::Thread* current_thread = nullptr;
+
 // Binding to a port within the reserved ports range (0-1023) requires root permissions,
 // so default to a port outside of that range.
 static u16 gdbstub_port = 24689;
 
 static bool halt_loop = true;
 static bool step_loop = false;
+static bool send_trap = false;
 
 // If set to false, the server will never be started and no
 // gdbstub-related functions will be executed.
@@ -165,6 +171,53 @@ static std::map<u64, Breakpoint> breakpoints_execute;
 static std::map<u64, Breakpoint> breakpoints_read;
 static std::map<u64, Breakpoint> breakpoints_write;
 
+static Kernel::Thread* FindThreadById(int id) {
+    for (int core = 0; core < Core::NUM_CPU_CORES; core++) {
+        auto threads = Core::System::GetInstance().Scheduler(core)->GetThreadList();
+        for (auto thread : threads) {
+            if (thread->GetThreadId() == id) {
+                current_thread = thread.get();
+                return current_thread;
+            }
+        }
+    }
+    return nullptr;
+}
+
+static u64 RegRead(int id, Kernel::Thread* thread = nullptr) {
+    if (!thread) {
+        return 0;
+    }
+
+    if (id < SP_REGISTER) {
+        return thread->context.cpu_registers[id];
+    } else if (id == SP_REGISTER) {
+        return thread->context.sp;
+    } else if (id == PC_REGISTER) {
+        return thread->context.pc;
+    } else if (id == CPSR_REGISTER) {
+        return thread->context.cpsr;
+    } else {
+        return 0;
+    }
+}
+
+static void RegWrite(int id, u64 val, Kernel::Thread* thread = nullptr) {
+    if (!thread) {
+        return;
+    }
+
+    if (id < SP_REGISTER) {
+        thread->context.cpu_registers[id] = val;
+    } else if (id == SP_REGISTER) {
+        thread->context.sp = val;
+    } else if (id == PC_REGISTER) {
+        thread->context.pc = val;
+    } else if (id == CPSR_REGISTER) {
+        thread->context.cpsr = val;
+    }
+}
+
 /**
  * Turns hex string character into the equivalent byte.
  *
@@ -179,7 +232,7 @@ static u8 HexCharToValue(u8 hex) {
         return hex - 'A' + 0xA;
     }
 
-    NGLOG_ERROR(Debug_GDBStub, "Invalid nibble: {} ({:02X})", hex, hex);
+    LOG_ERROR(Debug_GDBStub, "Invalid nibble: {} ({:02X})", hex, hex);
     return 0;
 }
 
@@ -193,7 +246,7 @@ static u8 NibbleToHex(u8 n) {
     if (n < 0xA) {
         return '0' + n;
     } else {
-        return 'A' + n - 0xA;
+        return 'a' + n - 0xA;
     }
 }
 
@@ -319,7 +372,7 @@ static u8 ReadByte() {
     u8 c;
     size_t received_size = recv(gdbserver_socket, reinterpret_cast<char*>(&c), 1, MSG_WAITALL);
     if (received_size != 1) {
-        NGLOG_ERROR(Debug_GDBStub, "recv failed: {}", received_size);
+        LOG_ERROR(Debug_GDBStub, "recv failed: {}", received_size);
         Shutdown();
     }
 
@@ -360,8 +413,8 @@ static void RemoveBreakpoint(BreakpointType type, PAddr addr) {
 
     auto bp = p.find(static_cast<u64>(addr));
     if (bp != p.end()) {
-        NGLOG_DEBUG(Debug_GDBStub, "gdb: removed a breakpoint: {:016X} bytes at {:016X} of type {}",
-                    bp->second.len, bp->second.addr, static_cast<int>(type));
+        LOG_DEBUG(Debug_GDBStub, "gdb: removed a breakpoint: {:016X} bytes at {:016X} of type {}",
+                  bp->second.len, bp->second.addr, static_cast<int>(type));
         p.erase(static_cast<u64>(addr));
     }
 }
@@ -406,10 +459,10 @@ bool CheckBreakpoint(PAddr addr, BreakpointType type) {
         }
 
         if (bp->second.active && (addr >= bp->second.addr && addr < bp->second.addr + len)) {
-            NGLOG_DEBUG(Debug_GDBStub,
-                        "Found breakpoint type {} @ {:016X}, range: {:016X}"
-                        " - {:016X} ({:X} bytes)",
-                        static_cast<int>(type), addr, bp->second.addr, bp->second.addr + len, len);
+            LOG_DEBUG(Debug_GDBStub,
+                      "Found breakpoint type {} @ {:016X}, range: {:016X}"
+                      " - {:016X} ({:X} bytes)",
+                      static_cast<int>(type), addr, bp->second.addr, bp->second.addr + len, len);
             return true;
         }
     }
@@ -425,7 +478,7 @@ bool CheckBreakpoint(PAddr addr, BreakpointType type) {
 static void SendPacket(const char packet) {
     size_t sent_size = send(gdbserver_socket, &packet, 1, 0);
     if (sent_size != 1) {
-        NGLOG_ERROR(Debug_GDBStub, "send failed");
+        LOG_ERROR(Debug_GDBStub, "send failed");
     }
 }
 
@@ -439,11 +492,13 @@ static void SendReply(const char* reply) {
         return;
     }
 
+    LOG_DEBUG(Debug_GDBStub, "Reply: {}", reply);
+
     memset(command_buffer, 0, sizeof(command_buffer));
 
     command_length = static_cast<u32>(strlen(reply));
     if (command_length + 4 > sizeof(command_buffer)) {
-        NGLOG_ERROR(Debug_GDBStub, "command_buffer overflow in SendReply");
+        LOG_ERROR(Debug_GDBStub, "command_buffer overflow in SendReply");
         return;
     }
 
@@ -460,7 +515,7 @@ static void SendReply(const char* reply) {
     while (left > 0) {
         int sent_size = send(gdbserver_socket, reinterpret_cast<char*>(ptr), left, 0);
         if (sent_size < 0) {
-            NGLOG_ERROR(Debug_GDBStub, "gdb: send failed");
+            LOG_ERROR(Debug_GDBStub, "gdb: send failed");
             return Shutdown();
         }
 
@@ -471,7 +526,7 @@ static void SendReply(const char* reply) {
 
 /// Handle query command from gdb client.
 static void HandleQuery() {
-    NGLOG_DEBUG(Debug_GDBStub, "gdb: query '{}'", command_buffer + 1);
+    LOG_DEBUG(Debug_GDBStub, "gdb: query '{}'", command_buffer + 1);
 
     const char* query = reinterpret_cast<const char*>(command_buffer + 1);
 
@@ -483,6 +538,22 @@ static void HandleQuery() {
     } else if (strncmp(query, "Xfer:features:read:target.xml:",
                        strlen("Xfer:features:read:target.xml:")) == 0) {
         SendReply(target_xml);
+    } else if (strncmp(query, "Offsets", strlen("Offsets")) == 0) {
+        std::string buffer = fmt::format("TextSeg={:0x}", Memory::PROCESS_IMAGE_VADDR);
+        SendReply(buffer.c_str());
+    } else if (strncmp(query, "fThreadInfo", strlen("fThreadInfo")) == 0) {
+        std::string val = "m";
+        for (int core = 0; core < Core::NUM_CPU_CORES; core++) {
+            auto threads = Core::System::GetInstance().Scheduler(core)->GetThreadList();
+            for (auto thread : threads) {
+                val += fmt::format("{:x}", thread->GetThreadId());
+                val += ",";
+            }
+        }
+        val.pop_back();
+        SendReply(val.c_str());
+    } else if (strncmp(query, "sThreadInfo", strlen("sThreadInfo")) == 0) {
+        SendReply("l");
     } else {
         SendReply("");
     }
@@ -490,11 +561,40 @@ static void HandleQuery() {
 
 /// Handle set thread command from gdb client.
 static void HandleSetThread() {
-    if (memcmp(command_buffer, "Hg0", 3) == 0 || memcmp(command_buffer, "Hc-1", 4) == 0 ||
-        memcmp(command_buffer, "Hc0", 4) == 0 || memcmp(command_buffer, "Hc1", 4) == 0) {
-        return SendReply("OK");
+    if (memcmp(command_buffer, "Hc", 2) == 0 || memcmp(command_buffer, "Hg", 2) == 0) {
+        int thread_id = -1;
+        if (command_buffer[2] != '-') {
+            thread_id = static_cast<int>(HexToInt(
+                command_buffer + 2,
+                command_length - 2 /*strlen(reinterpret_cast<char*>(command_buffer) + 2)*/));
+        }
+        if (thread_id >= 1) {
+            current_thread = FindThreadById(thread_id);
+        }
+        if (!current_thread) {
+            thread_id = 1;
+            current_thread = FindThreadById(thread_id);
+        }
+        if (current_thread) {
+            SendReply("OK");
+            return;
+        }
     }
+    SendReply("E01");
+}
 
+/// Handle thread alive command from gdb client.
+static void HandleThreadAlive() {
+    int thread_id = static_cast<int>(
+        HexToInt(command_buffer + 1,
+                 command_length - 1 /*strlen(reinterpret_cast<char*>(command_buffer) + 1)*/));
+    if (thread_id == 0) {
+        thread_id = 1;
+    }
+    if (FindThreadById(thread_id)) {
+        SendReply("OK");
+        return;
+    }
     SendReply("E01");
 }
 
@@ -503,15 +603,24 @@ static void HandleSetThread() {
  *
  * @param signal Signal to be sent to client.
  */
-static void SendSignal(u32 signal) {
+static void SendSignal(Kernel::Thread* thread, u32 signal, bool full = true) {
     if (gdbserver_socket == -1) {
         return;
     }
 
     latest_signal = signal;
 
-    std::string buffer = fmt::format("T{:02x}", latest_signal);
-    NGLOG_DEBUG(Debug_GDBStub, "Response: {}", buffer);
+    std::string buffer;
+    if (full) {
+        buffer = fmt::format("T{:02x}{:02x}:{:016x};{:02x}:{:016x};", latest_signal, PC_REGISTER,
+                             Common::swap64(RegRead(PC_REGISTER, thread)), SP_REGISTER,
+                             Common::swap64(RegRead(SP_REGISTER, thread)));
+    } else {
+        buffer = fmt::format("T{:02x};", latest_signal);
+    }
+
+    buffer += fmt::format("thread:{:x};", thread->GetThreadId());
+
     SendReply(buffer.c_str());
 }
 
@@ -525,18 +634,18 @@ static void ReadCommand() {
         // ignore ack
         return;
     } else if (c == 0x03) {
-        NGLOG_INFO(Debug_GDBStub, "gdb: found break command");
+        LOG_INFO(Debug_GDBStub, "gdb: found break command");
         halt_loop = true;
-        SendSignal(SIGTRAP);
+        SendSignal(current_thread, SIGTRAP);
         return;
     } else if (c != GDB_STUB_START) {
-        NGLOG_DEBUG(Debug_GDBStub, "gdb: read invalid byte {:02X}", c);
+        LOG_DEBUG(Debug_GDBStub, "gdb: read invalid byte {:02X}", c);
         return;
     }
 
     while ((c = ReadByte()) != GDB_STUB_END) {
         if (command_length >= sizeof(command_buffer)) {
-            NGLOG_ERROR(Debug_GDBStub, "gdb: command_buffer overflow");
+            LOG_ERROR(Debug_GDBStub, "gdb: command_buffer overflow");
             SendPacket(GDB_STUB_NACK);
             return;
         }
@@ -549,10 +658,9 @@ static void ReadCommand() {
     u8 checksum_calculated = CalculateChecksum(command_buffer, command_length);
 
     if (checksum_received != checksum_calculated) {
-        NGLOG_ERROR(
-            Debug_GDBStub,
-            "gdb: invalid checksum: calculated {:02X} and read {:02X} for ${}# (length: {})",
-            checksum_calculated, checksum_received, command_buffer, command_length);
+        LOG_ERROR(Debug_GDBStub,
+                  "gdb: invalid checksum: calculated {:02X} and read {:02X} for ${}# (length: {})",
+                  checksum_calculated, checksum_received, command_buffer, command_length);
 
         command_length = 0;
 
@@ -579,7 +687,7 @@ static bool IsDataAvailable() {
     t.tv_usec = 0;
 
     if (select(gdbserver_socket + 1, &fd_socket, nullptr, nullptr, &t) < 0) {
-        NGLOG_ERROR(Debug_GDBStub, "select failed");
+        LOG_ERROR(Debug_GDBStub, "select failed");
         return false;
     }
 
@@ -598,11 +706,11 @@ static void ReadRegister() {
     }
 
     if (id <= SP_REGISTER) {
-        LongToGdbHex(reply, Core::CurrentArmInterface().GetReg(static_cast<int>(id)));
+        LongToGdbHex(reply, RegRead(id, current_thread));
     } else if (id == PC_REGISTER) {
-        LongToGdbHex(reply, Core::CurrentArmInterface().GetPC());
+        LongToGdbHex(reply, RegRead(id, current_thread));
     } else if (id == CPSR_REGISTER) {
-        IntToGdbHex(reply, Core::CurrentArmInterface().GetCPSR());
+        IntToGdbHex(reply, (u32)RegRead(id, current_thread));
     } else {
         return SendReply("E01");
     }
@@ -618,16 +726,16 @@ static void ReadRegisters() {
     u8* bufptr = buffer;
 
     for (int reg = 0; reg <= SP_REGISTER; reg++) {
-        LongToGdbHex(bufptr + reg * 16, Core::CurrentArmInterface().GetReg(reg));
+        LongToGdbHex(bufptr + reg * 16, RegRead(reg, current_thread));
     }
 
     bufptr += (32 * 16);
 
-    LongToGdbHex(bufptr, Core::CurrentArmInterface().GetPC());
+    LongToGdbHex(bufptr, RegRead(PC_REGISTER, current_thread));
 
     bufptr += 16;
 
-    IntToGdbHex(bufptr, Core::CurrentArmInterface().GetCPSR());
+    IntToGdbHex(bufptr, (u32)RegRead(CPSR_REGISTER, current_thread));
 
     bufptr += 8;
 
@@ -646,11 +754,11 @@ static void WriteRegister() {
     }
 
     if (id <= SP_REGISTER) {
-        Core::CurrentArmInterface().SetReg(id, GdbHexToLong(buffer_ptr));
+        RegWrite(id, GdbHexToLong(buffer_ptr), current_thread);
     } else if (id == PC_REGISTER) {
-        Core::CurrentArmInterface().SetPC(GdbHexToLong(buffer_ptr));
+        RegWrite(id, GdbHexToLong(buffer_ptr), current_thread);
     } else if (id == CPSR_REGISTER) {
-        Core::CurrentArmInterface().SetCPSR(GdbHexToInt(buffer_ptr));
+        RegWrite(id, GdbHexToInt(buffer_ptr), current_thread);
     } else {
         return SendReply("E01");
     }
@@ -667,11 +775,11 @@ static void WriteRegisters() {
 
     for (int i = 0, reg = 0; reg <= CPSR_REGISTER; i++, reg++) {
         if (reg <= SP_REGISTER) {
-            Core::CurrentArmInterface().SetReg(reg, GdbHexToLong(buffer_ptr + i * 16));
+            RegWrite(reg, GdbHexToLong(buffer_ptr + i * 16), current_thread);
         } else if (reg == PC_REGISTER) {
-            Core::CurrentArmInterface().SetPC(GdbHexToLong(buffer_ptr + i * 16));
+            RegWrite(PC_REGISTER, GdbHexToLong(buffer_ptr + i * 16), current_thread);
         } else if (reg == CPSR_REGISTER) {
-            Core::CurrentArmInterface().SetCPSR(GdbHexToInt(buffer_ptr + i * 16));
+            RegWrite(CPSR_REGISTER, GdbHexToInt(buffer_ptr + i * 16), current_thread);
         } else {
             UNIMPLEMENTED();
         }
@@ -692,7 +800,7 @@ static void ReadMemory() {
     u64 len =
         HexToLong(start_offset, static_cast<u64>((command_buffer + command_length) - start_offset));
 
-    NGLOG_DEBUG(Debug_GDBStub, "gdb: addr: {:016X} len: {:016X}", addr, len);
+    LOG_DEBUG(Debug_GDBStub, "gdb: addr: {:016X} len: {:016X}", addr, len);
 
     if (len * 2 > sizeof(reply)) {
         SendReply("E01");
@@ -734,7 +842,7 @@ static void WriteMemory() {
 void Break(bool is_memory_break) {
     if (!halt_loop) {
         halt_loop = true;
-        SendSignal(SIGTRAP);
+        send_trap = true;
     }
 
     memory_break = is_memory_break;
@@ -744,10 +852,10 @@ void Break(bool is_memory_break) {
 static void Step() {
     step_loop = true;
     halt_loop = true;
-    step_break = true;
-    SendSignal(SIGTRAP);
+    send_trap = true;
 }
 
+/// Tell the CPU if we hit a memory breakpoint.
 bool IsMemoryBreak() {
     if (IsConnected()) {
         return false;
@@ -759,7 +867,6 @@ bool IsMemoryBreak() {
 /// Tell the CPU to continue executing.
 static void Continue() {
     memory_break = false;
-    step_break = false;
     step_loop = false;
     halt_loop = false;
 }
@@ -780,8 +887,8 @@ static bool CommitBreakpoint(BreakpointType type, PAddr addr, u64 len) {
     breakpoint.len = len;
     p.insert({addr, breakpoint});
 
-    NGLOG_DEBUG(Debug_GDBStub, "gdb: added {} breakpoint: {:016X} bytes at {:016X}",
-                static_cast<int>(type), breakpoint.len, breakpoint.addr);
+    LOG_DEBUG(Debug_GDBStub, "gdb: added {} breakpoint: {:016X} bytes at {:016X}",
+              static_cast<int>(type), breakpoint.len, breakpoint.addr);
 
     return true;
 }
@@ -888,7 +995,7 @@ void HandlePacket() {
         return;
     }
 
-    NGLOG_DEBUG(Debug_GDBStub, "Packet: {}", command_buffer);
+    LOG_DEBUG(Debug_GDBStub, "Packet: {}", command_buffer);
 
     switch (command_buffer[0]) {
     case 'q':
@@ -898,11 +1005,11 @@ void HandlePacket() {
         HandleSetThread();
         break;
     case '?':
-        SendSignal(latest_signal);
+        SendSignal(current_thread, latest_signal);
         break;
     case 'k':
         Shutdown();
-        NGLOG_INFO(Debug_GDBStub, "killed by gdb");
+        LOG_INFO(Debug_GDBStub, "killed by gdb");
         return;
     case 'g':
         ReadRegisters();
@@ -935,6 +1042,9 @@ void HandlePacket() {
     case 'Z':
         AddBreakpoint();
         break;
+    case 'T':
+        HandleThreadAlive();
+        break;
     default:
         SendReply("");
         break;
@@ -981,7 +1091,7 @@ static void Init(u16 port) {
     breakpoints_write.clear();
 
     // Start gdb server
-    NGLOG_INFO(Debug_GDBStub, "Starting GDB server on port {}...", port);
+    LOG_INFO(Debug_GDBStub, "Starting GDB server on port {}...", port);
 
     sockaddr_in saddr_server = {};
     saddr_server.sin_family = AF_INET;
@@ -994,28 +1104,28 @@ static void Init(u16 port) {
 
     int tmpsock = static_cast<int>(socket(PF_INET, SOCK_STREAM, 0));
     if (tmpsock == -1) {
-        NGLOG_ERROR(Debug_GDBStub, "Failed to create gdb socket");
+        LOG_ERROR(Debug_GDBStub, "Failed to create gdb socket");
     }
 
     // Set socket to SO_REUSEADDR so it can always bind on the same port
     int reuse_enabled = 1;
     if (setsockopt(tmpsock, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuse_enabled,
                    sizeof(reuse_enabled)) < 0) {
-        NGLOG_ERROR(Debug_GDBStub, "Failed to set gdb socket option");
+        LOG_ERROR(Debug_GDBStub, "Failed to set gdb socket option");
     }
 
     const sockaddr* server_addr = reinterpret_cast<const sockaddr*>(&saddr_server);
     socklen_t server_addrlen = sizeof(saddr_server);
     if (bind(tmpsock, server_addr, server_addrlen) < 0) {
-        NGLOG_ERROR(Debug_GDBStub, "Failed to bind gdb socket");
+        LOG_ERROR(Debug_GDBStub, "Failed to bind gdb socket");
     }
 
     if (listen(tmpsock, 1) < 0) {
-        NGLOG_ERROR(Debug_GDBStub, "Failed to listen to gdb socket");
+        LOG_ERROR(Debug_GDBStub, "Failed to listen to gdb socket");
     }
 
     // Wait for gdb to connect
-    NGLOG_INFO(Debug_GDBStub, "Waiting for gdb to connect...");
+    LOG_INFO(Debug_GDBStub, "Waiting for gdb to connect...");
     sockaddr_in saddr_client;
     sockaddr* client_addr = reinterpret_cast<sockaddr*>(&saddr_client);
     socklen_t client_addrlen = sizeof(saddr_client);
@@ -1026,9 +1136,9 @@ static void Init(u16 port) {
         halt_loop = false;
         step_loop = false;
 
-        NGLOG_ERROR(Debug_GDBStub, "Failed to accept gdb client");
+        LOG_ERROR(Debug_GDBStub, "Failed to accept gdb client");
     } else {
-        NGLOG_INFO(Debug_GDBStub, "Client connected.");
+        LOG_INFO(Debug_GDBStub, "Client connected.");
         saddr_client.sin_addr.s_addr = ntohl(saddr_client.sin_addr.s_addr);
     }
 
@@ -1047,7 +1157,7 @@ void Shutdown() {
         return;
     }
 
-    NGLOG_INFO(Debug_GDBStub, "Stopping GDB ...");
+    LOG_INFO(Debug_GDBStub, "Stopping GDB ...");
     if (gdbserver_socket != -1) {
         shutdown(gdbserver_socket, SHUT_RDWR);
         gdbserver_socket = -1;
@@ -1057,7 +1167,7 @@ void Shutdown() {
     WSACleanup();
 #endif
 
-    NGLOG_INFO(Debug_GDBStub, "GDB stopped.");
+    LOG_INFO(Debug_GDBStub, "GDB stopped.");
 }
 
 bool IsServerEnabled() {
@@ -1079,4 +1189,11 @@ bool GetCpuStepFlag() {
 void SetCpuStepFlag(bool is_step) {
     step_loop = is_step;
 }
+
+void SendTrap(Kernel::Thread* thread, int trap) {
+    if (send_trap) {
+        send_trap = false;
+        SendSignal(thread, trap);
+    }
+}
 }; // namespace GDBStub

src/core/gdbstub/gdbstub.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include "common/common_types.h"
+#include "core/hle/kernel/thread.h"
 
 namespace GDBStub {
 
@@ -91,4 +92,12 @@ bool GetCpuStepFlag();
  * @param is_step
  */
 void SetCpuStepFlag(bool is_step);
+
+/**
+ * Send trap signal from thread back to the gdbstub server.
+ *
+ * @param thread Sending thread.
+ * @param trap Trap no.
+ */
+void SendTrap(Kernel::Thread* thread, int trap);
 } // namespace GDBStub

src/core/hle/ipc.h

@@ -29,7 +29,10 @@ enum class ControlCommand : u32 {
 };
 
 enum class CommandType : u32 {
+    Invalid = 0,
+    LegacyRequest = 1,
     Close = 2,
+    LegacyControl = 3,
     Request = 4,
     Control = 5,
     RequestWithContext = 6,

src/core/hle/kernel/address_arbiter.cpp

@@ -0,0 +1,173 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "core/core.h"
+#include "core/hle/kernel/errors.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/kernel/thread.h"
+#include "core/hle/lock.h"
+#include "core/memory.h"
+
+namespace Kernel {
+namespace AddressArbiter {
+
+// Performs actual address waiting logic.
+static ResultCode WaitForAddress(VAddr address, s64 timeout) {
+    SharedPtr<Thread> current_thread = GetCurrentThread();
+    current_thread->arb_wait_address = address;
+    current_thread->status = THREADSTATUS_WAIT_ARB;
+    current_thread->wakeup_callback = nullptr;
+
+    current_thread->WakeAfterDelay(timeout);
+
+    Core::System::GetInstance().CpuCore(current_thread->processor_id).PrepareReschedule();
+    return RESULT_TIMEOUT;
+}
+
+// Gets the threads waiting on an address.
+static void GetThreadsWaitingOnAddress(std::vector<SharedPtr<Thread>>& waiting_threads,
+                                       VAddr address) {
+    auto RetrieveWaitingThreads =
+        [](size_t core_index, std::vector<SharedPtr<Thread>>& waiting_threads, VAddr arb_addr) {
+            const auto& scheduler = Core::System::GetInstance().Scheduler(core_index);
+            auto& thread_list = scheduler->GetThreadList();
+
+            for (auto& thread : thread_list) {
+                if (thread->arb_wait_address == arb_addr)
+                    waiting_threads.push_back(thread);
+            }
+        };
+
+    // Retrieve a list of all threads that are waiting for this address.
+    RetrieveWaitingThreads(0, waiting_threads, address);
+    RetrieveWaitingThreads(1, waiting_threads, address);
+    RetrieveWaitingThreads(2, waiting_threads, address);
+    RetrieveWaitingThreads(3, waiting_threads, address);
+    // Sort them by priority, such that the highest priority ones come first.
+    std::sort(waiting_threads.begin(), waiting_threads.end(),
+              [](const SharedPtr<Thread>& lhs, const SharedPtr<Thread>& rhs) {
+                  return lhs->current_priority < rhs->current_priority;
+              });
+}
+
+// Wake up num_to_wake (or all) threads in a vector.
+static void WakeThreads(std::vector<SharedPtr<Thread>>& waiting_threads, s32 num_to_wake) {
+    // Only process up to 'target' threads, unless 'target' is <= 0, in which case process
+    // them all.
+    size_t last = waiting_threads.size();
+    if (num_to_wake > 0)
+        last = num_to_wake;
+
+    // Signal the waiting threads.
+    for (size_t i = 0; i < last; i++) {
+        ASSERT(waiting_threads[i]->status = THREADSTATUS_WAIT_ARB);
+        waiting_threads[i]->SetWaitSynchronizationResult(RESULT_SUCCESS);
+        waiting_threads[i]->arb_wait_address = 0;
+        waiting_threads[i]->ResumeFromWait();
+    }
+}
+
+// Signals an address being waited on.
+ResultCode SignalToAddress(VAddr address, s32 num_to_wake) {
+    // Get threads waiting on the address.
+    std::vector<SharedPtr<Thread>> waiting_threads;
+    GetThreadsWaitingOnAddress(waiting_threads, address);
+
+    WakeThreads(waiting_threads, num_to_wake);
+    return RESULT_SUCCESS;
+}
+
+// Signals an address being waited on and increments its value if equal to the value argument.
+ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake) {
+    // Ensure that we can write to the address.
+    if (!Memory::IsValidVirtualAddress(address)) {
+        return ERR_INVALID_ADDRESS_STATE;
+    }
+
+    if (static_cast<s32>(Memory::Read32(address)) == value) {
+        Memory::Write32(address, static_cast<u32>(value + 1));
+    } else {
+        return ERR_INVALID_STATE;
+    }
+
+    return SignalToAddress(address, num_to_wake);
+}
+
+// Signals an address being waited on and modifies its value based on waiting thread count if equal
+// to the value argument.
+ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
+                                                         s32 num_to_wake) {
+    // Ensure that we can write to the address.
+    if (!Memory::IsValidVirtualAddress(address)) {
+        return ERR_INVALID_ADDRESS_STATE;
+    }
+
+    // Get threads waiting on the address.
+    std::vector<SharedPtr<Thread>> waiting_threads;
+    GetThreadsWaitingOnAddress(waiting_threads, address);
+
+    // Determine the modified value depending on the waiting count.
+    s32 updated_value;
+    if (waiting_threads.size() == 0) {
+        updated_value = value - 1;
+    } else if (num_to_wake <= 0 || waiting_threads.size() <= num_to_wake) {
+        updated_value = value + 1;
+    } else {
+        updated_value = value;
+    }
+
+    if (static_cast<s32>(Memory::Read32(address)) == value) {
+        Memory::Write32(address, static_cast<u32>(updated_value));
+    } else {
+        return ERR_INVALID_STATE;
+    }
+
+    WakeThreads(waiting_threads, num_to_wake);
+    return RESULT_SUCCESS;
+}
+
+// Waits on an address if the value passed is less than the argument value, optionally decrementing.
+ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement) {
+    // Ensure that we can read the address.
+    if (!Memory::IsValidVirtualAddress(address)) {
+        return ERR_INVALID_ADDRESS_STATE;
+    }
+
+    s32 cur_value = static_cast<s32>(Memory::Read32(address));
+    if (cur_value < value) {
+        Memory::Write32(address, static_cast<u32>(cur_value - 1));
+    } else {
+        return ERR_INVALID_STATE;
+    }
+    // Short-circuit without rescheduling, if timeout is zero.
+    if (timeout == 0) {
+        return RESULT_TIMEOUT;
+    }
+
+    return WaitForAddress(address, timeout);
+}
+
+// Waits on an address if the value passed is equal to the argument value.
+ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) {
+    // Ensure that we can read the address.
+    if (!Memory::IsValidVirtualAddress(address)) {
+        return ERR_INVALID_ADDRESS_STATE;
+    }
+    // Only wait for the address if equal.
+    if (static_cast<s32>(Memory::Read32(address)) != value) {
+        return ERR_INVALID_STATE;
+    }
+    // Short-circuit without rescheduling, if timeout is zero.
+    if (timeout == 0) {
+        return RESULT_TIMEOUT;
+    }
+
+    return WaitForAddress(address, timeout);
+}
+} // namespace AddressArbiter
+} // namespace Kernel

src/core/hle/kernel/address_arbiter.h

@@ -0,0 +1,32 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/result.h"
+
+namespace Kernel {
+
+namespace AddressArbiter {
+enum class ArbitrationType {
+    WaitIfLessThan = 0,
+    DecrementAndWaitIfLessThan = 1,
+    WaitIfEqual = 2,
+};
+
+enum class SignalType {
+    Signal = 0,
+    IncrementAndSignalIfEqual = 1,
+    ModifyByWaitingCountAndSignalIfEqual = 2,
+};
+
+ResultCode SignalToAddress(VAddr address, s32 num_to_wake);
+ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
+ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
+
+ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement);
+ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout);
+} // namespace AddressArbiter
+
+} // namespace Kernel

src/core/hle/kernel/errors.h

@@ -20,11 +20,16 @@ enum {
     MaxConnectionsReached = 52,
 
     // Confirmed Switch OS error codes
-    MisalignedAddress = 102,
+    InvalidAddress = 102,
+    InvalidMemoryState = 106,
+    InvalidProcessorId = 113,
     InvalidHandle = 114,
+    InvalidCombination = 116,
     Timeout = 117,
     SynchronizationCanceled = 118,
     TooLarge = 119,
+    InvalidEnumValue = 120,
+    InvalidState = 125,
 };
 }
 
@@ -37,14 +42,15 @@ constexpr ResultCode ERR_SESSION_CLOSED_BY_REMOTE(-1);
 constexpr ResultCode ERR_PORT_NAME_TOO_LONG(-1);
 constexpr ResultCode ERR_WRONG_PERMISSION(-1);
 constexpr ResultCode ERR_MAX_CONNECTIONS_REACHED(-1);
-constexpr ResultCode ERR_INVALID_ENUM_VALUE(-1);
+constexpr ResultCode ERR_INVALID_ENUM_VALUE(ErrorModule::Kernel, ErrCodes::InvalidEnumValue);
 constexpr ResultCode ERR_INVALID_ENUM_VALUE_FND(-1);
 constexpr ResultCode ERR_INVALID_COMBINATION(-1);
 constexpr ResultCode ERR_INVALID_COMBINATION_KERNEL(-1);
 constexpr ResultCode ERR_OUT_OF_MEMORY(-1);
-constexpr ResultCode ERR_INVALID_ADDRESS(-1);
-constexpr ResultCode ERR_INVALID_ADDRESS_STATE(-1);
+constexpr ResultCode ERR_INVALID_ADDRESS(ErrorModule::Kernel, ErrCodes::InvalidAddress);
+constexpr ResultCode ERR_INVALID_ADDRESS_STATE(ErrorModule::Kernel, ErrCodes::InvalidMemoryState);
 constexpr ResultCode ERR_INVALID_HANDLE(ErrorModule::Kernel, ErrCodes::InvalidHandle);
+constexpr ResultCode ERR_INVALID_STATE(ErrorModule::Kernel, ErrCodes::InvalidState);
 constexpr ResultCode ERR_INVALID_POINTER(-1);
 constexpr ResultCode ERR_INVALID_OBJECT_ADDR(-1);
 constexpr ResultCode ERR_NOT_AUTHORIZED(-1);

src/core/hle/kernel/handle_table.cpp

@@ -26,7 +26,7 @@ ResultVal<Handle> HandleTable::Create(SharedPtr<Object> obj) {
 
     u16 slot = next_free_slot;
     if (slot >= generations.size()) {
-        NGLOG_ERROR(Kernel, "Unable to allocate Handle, too many slots in use.");
+        LOG_ERROR(Kernel, "Unable to allocate Handle, too many slots in use.");
         return ERR_OUT_OF_HANDLES;
     }
     next_free_slot = generations[slot];
@@ -48,7 +48,7 @@ ResultVal<Handle> HandleTable::Create(SharedPtr<Object> obj) {
 ResultVal<Handle> HandleTable::Duplicate(Handle handle) {
     SharedPtr<Object> object = GetGeneric(handle);
     if (object == nullptr) {
-        NGLOG_ERROR(Kernel, "Tried to duplicate invalid handle: {:08X}", handle);
+        LOG_ERROR(Kernel, "Tried to duplicate invalid handle: {:08X}", handle);
         return ERR_INVALID_HANDLE;
     }
     return Create(std::move(object));

src/core/hle/kernel/hle_ipc.cpp

@@ -120,7 +120,7 @@ void HLERequestContext::ParseCommandBuffer(u32_le* src_cmdbuf, bool incoming) {
                 std::make_shared<IPC::DomainMessageHeader>(rp.PopRaw<IPC::DomainMessageHeader>());
         } else {
             if (Session()->IsDomain())
-                NGLOG_WARNING(IPC, "Domain request has no DomainMessageHeader!");
+                LOG_WARNING(IPC, "Domain request has no DomainMessageHeader!");
         }
     }
 
@@ -271,11 +271,16 @@ std::vector<u8> HLERequestContext::ReadBuffer(int buffer_index) const {
 }
 
 size_t HLERequestContext::WriteBuffer(const void* buffer, size_t size, int buffer_index) const {
+    if (size == 0) {
+        LOG_WARNING(Core, "skip empty buffer write");
+        return 0;
+    }
+
     const bool is_buffer_b{BufferDescriptorB().size() && BufferDescriptorB()[buffer_index].Size()};
     const size_t buffer_size{GetWriteBufferSize(buffer_index)};
     if (size > buffer_size) {
-        NGLOG_CRITICAL(Core, "size ({:016X}) is greater than buffer_size ({:016X})", size,
-                       buffer_size);
+        LOG_CRITICAL(Core, "size ({:016X}) is greater than buffer_size ({:016X})", size,
+                     buffer_size);
         size = buffer_size; // TODO(bunnei): This needs to be HW tested
     }
 

src/core/hle/kernel/mutex.cpp

@@ -59,7 +59,7 @@ ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
                              Handle requesting_thread_handle) {
     // The mutex address must be 4-byte aligned
     if ((address % sizeof(u32)) != 0) {
-        return ResultCode(ErrorModule::Kernel, ErrCodes::MisalignedAddress);
+        return ResultCode(ErrorModule::Kernel, ErrCodes::InvalidAddress);
     }
 
     SharedPtr<Thread> holding_thread = g_handle_table.Get<Thread>(holding_thread_handle);
@@ -97,7 +97,7 @@ ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
 ResultCode Mutex::Release(VAddr address) {
     // The mutex address must be 4-byte aligned
     if ((address % sizeof(u32)) != 0) {
-        return ResultCode(ErrorModule::Kernel, ErrCodes::MisalignedAddress);
+        return ResultCode(ErrorModule::Kernel, ErrCodes::InvalidAddress);
     }
 
     auto [thread, num_waiters] = GetHighestPriorityMutexWaitingThread(GetCurrentThread(), address);

src/core/hle/kernel/process.cpp

@@ -54,7 +54,7 @@ void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
             continue;
         } else if ((type & 0xF00) == 0xE00) { // 0x0FFF
             // Allowed interrupts list
-            NGLOG_WARNING(Loader, "ExHeader allowed interrupts list ignored");
+            LOG_WARNING(Loader, "ExHeader allowed interrupts list ignored");
         } else if ((type & 0xF80) == 0xF00) { // 0x07FF
             // Allowed syscalls mask
             unsigned int index = ((descriptor >> 24) & 7) * 24;
@@ -74,7 +74,7 @@ void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
         } else if ((type & 0xFFE) == 0xFF8) { // 0x001F
             // Mapped memory range
             if (i + 1 >= len || ((kernel_caps[i + 1] >> 20) & 0xFFE) != 0xFF8) {
-                NGLOG_WARNING(Loader, "Incomplete exheader memory range descriptor ignored.");
+                LOG_WARNING(Loader, "Incomplete exheader memory range descriptor ignored.");
                 continue;
             }
             u32 end_desc = kernel_caps[i + 1];
@@ -109,9 +109,9 @@ void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
 
             int minor = kernel_version & 0xFF;
             int major = (kernel_version >> 8) & 0xFF;
-            NGLOG_INFO(Loader, "ExHeader kernel version: {}.{}", major, minor);
+            LOG_INFO(Loader, "ExHeader kernel version: {}.{}", major, minor);
         } else {
-            NGLOG_ERROR(Loader, "Unhandled kernel caps descriptor: 0x{:08X}", descriptor);
+            LOG_ERROR(Loader, "Unhandled kernel caps descriptor: 0x{:08X}", descriptor);
         }
     }
 }

src/core/hle/kernel/resource_limit.cpp

@@ -29,7 +29,7 @@ SharedPtr<ResourceLimit> ResourceLimit::GetForCategory(ResourceLimitCategory cat
     case ResourceLimitCategory::OTHER:
         return resource_limits[static_cast<u8>(category)];
     default:
-        NGLOG_CRITICAL(Kernel, "Unknown resource limit category");
+        LOG_CRITICAL(Kernel, "Unknown resource limit category");
         UNREACHABLE();
     }
 }
@@ -55,7 +55,7 @@ s32 ResourceLimit::GetCurrentResourceValue(ResourceType resource) const {
     case ResourceType::CPUTime:
         return current_cpu_time;
     default:
-        NGLOG_ERROR(Kernel, "Unknown resource type={:08X}", static_cast<u32>(resource));
+        LOG_ERROR(Kernel, "Unknown resource type={:08X}", static_cast<u32>(resource));
         UNIMPLEMENTED();
         return 0;
     }
@@ -84,7 +84,7 @@ u32 ResourceLimit::GetMaxResourceValue(ResourceType resource) const {
     case ResourceType::CPUTime:
         return max_cpu_time;
     default:
-        NGLOG_ERROR(Kernel, "Unknown resource type={:08X}", static_cast<u32>(resource));
+        LOG_ERROR(Kernel, "Unknown resource type={:08X}", static_cast<u32>(resource));
         UNIMPLEMENTED();
         return 0;
     }

src/core/hle/kernel/scheduler.cpp

@@ -99,11 +99,11 @@ void Scheduler::Reschedule() {
     Thread* next = PopNextReadyThread();
 
     if (cur && next) {
-        NGLOG_TRACE(Kernel, "context switch {} -> {}", cur->GetObjectId(), next->GetObjectId());
+        LOG_TRACE(Kernel, "context switch {} -> {}", cur->GetObjectId(), next->GetObjectId());
     } else if (cur) {
-        NGLOG_TRACE(Kernel, "context switch {} -> idle", cur->GetObjectId());
+        LOG_TRACE(Kernel, "context switch {} -> idle", cur->GetObjectId());
     } else if (next) {
-        NGLOG_TRACE(Kernel, "context switch idle -> {}", next->GetObjectId());
+        LOG_TRACE(Kernel, "context switch idle -> {}", next->GetObjectId());
     }
 
     SwitchContext(next);

src/core/hle/kernel/server_session.cpp

@@ -71,7 +71,7 @@ ResultCode ServerSession::HandleDomainSyncRequest(Kernel::HLERequestContext& con
             return domain_request_handlers[object_id - 1]->HandleSyncRequest(context);
 
         case IPC::DomainMessageHeader::CommandType::CloseVirtualHandle: {
-            NGLOG_DEBUG(IPC, "CloseVirtualHandle, object_id=0x{:08X}", object_id);
+            LOG_DEBUG(IPC, "CloseVirtualHandle, object_id=0x{:08X}", object_id);
 
             domain_request_handlers[object_id - 1] = nullptr;
 
@@ -81,8 +81,8 @@ ResultCode ServerSession::HandleDomainSyncRequest(Kernel::HLERequestContext& con
         }
         }
 
-        NGLOG_CRITICAL(IPC, "Unknown domain command={}",
-                       static_cast<int>(domain_message_header->command.Value()));
+        LOG_CRITICAL(IPC, "Unknown domain command={}",
+                     static_cast<int>(domain_message_header->command.Value()));
         ASSERT(false);
     }
 

src/core/hle/kernel/shared_memory.cpp

@@ -107,16 +107,16 @@ ResultCode SharedMemory::Map(Process* target_process, VAddr address, MemoryPermi
 
     // Error out if the requested permissions don't match what the creator process allows.
     if (static_cast<u32>(permissions) & ~static_cast<u32>(own_other_permissions)) {
-        NGLOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
-                    GetObjectId(), address, name);
+        LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
+                  GetObjectId(), address, name);
         return ERR_INVALID_COMBINATION;
     }
 
     // Error out if the provided permissions are not compatible with what the creator process needs.
     if (other_permissions != MemoryPermission::DontCare &&
         static_cast<u32>(this->permissions) & ~static_cast<u32>(other_permissions)) {
-        NGLOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
-                    GetObjectId(), address, name);
+        LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
+                  GetObjectId(), address, name);
         return ERR_WRONG_PERMISSION;
     }
 
@@ -131,7 +131,7 @@ ResultCode SharedMemory::Map(Process* target_process, VAddr address, MemoryPermi
     auto result = target_process->vm_manager.MapMemoryBlock(
         target_address, backing_block, backing_block_offset, size, MemoryState::Shared);
     if (result.Failed()) {
-        NGLOG_ERROR(
+        LOG_ERROR(
             Kernel,
             "cannot map id={}, target_address=0x{:X} name={}, error mapping to virtual memory",
             GetObjectId(), target_address, name);

src/core/hle/kernel/svc.cpp

@@ -11,6 +11,7 @@
 #include "common/string_util.h"
 #include "core/core.h"
 #include "core/core_timing.h"
+#include "core/hle/kernel/address_arbiter.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/client_session.h"
 #include "core/hle/kernel/event.h"
@@ -31,7 +32,7 @@ namespace Kernel {
 
 /// Set the process heap to a given Size. It can both extend and shrink the heap.
 static ResultCode SetHeapSize(VAddr* heap_addr, u64 heap_size) {
-    NGLOG_TRACE(Kernel_SVC, "called, heap_size=0x{:X}", heap_size);
+    LOG_TRACE(Kernel_SVC, "called, heap_size=0x{:X}", heap_size);
     auto& process = *Core::CurrentProcess();
     CASCADE_RESULT(*heap_addr,
                    process.HeapAllocate(Memory::HEAP_VADDR, heap_size, VMAPermission::ReadWrite));
@@ -39,21 +40,21 @@ static ResultCode SetHeapSize(VAddr* heap_addr, u64 heap_size) {
 }
 
 static ResultCode SetMemoryAttribute(VAddr addr, u64 size, u32 state0, u32 state1) {
-    NGLOG_WARNING(Kernel_SVC, "(STUBBED) called, addr=0x{:X}", addr);
+    LOG_WARNING(Kernel_SVC, "(STUBBED) called, addr=0x{:X}", addr);
     return RESULT_SUCCESS;
 }
 
 /// Maps a memory range into a different range.
 static ResultCode MapMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
-    NGLOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
-                src_addr, size);
+    LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
+              src_addr, size);
     return Core::CurrentProcess()->MirrorMemory(dst_addr, src_addr, size);
 }
 
 /// Unmaps a region that was previously mapped with svcMapMemory
 static ResultCode UnmapMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
-    NGLOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
-                src_addr, size);
+    LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
+              src_addr, size);
     return Core::CurrentProcess()->UnmapMemory(dst_addr, src_addr, size);
 }
 
@@ -68,11 +69,11 @@ static ResultCode ConnectToNamedPort(Handle* out_handle, VAddr port_name_address
     if (port_name.size() > PortNameMaxLength)
         return ERR_PORT_NAME_TOO_LONG;
 
-    NGLOG_TRACE(Kernel_SVC, "called port_name={}", port_name);
+    LOG_TRACE(Kernel_SVC, "called port_name={}", port_name);
 
     auto it = Service::g_kernel_named_ports.find(port_name);
     if (it == Service::g_kernel_named_ports.end()) {
-        NGLOG_WARNING(Kernel_SVC, "tried to connect to unknown port: {}", port_name);
+        LOG_WARNING(Kernel_SVC, "tried to connect to unknown port: {}", port_name);
         return ERR_NOT_FOUND;
     }
 
@@ -90,11 +91,11 @@ static ResultCode ConnectToNamedPort(Handle* out_handle, VAddr port_name_address
 static ResultCode SendSyncRequest(Handle handle) {
     SharedPtr<ClientSession> session = g_handle_table.Get<ClientSession>(handle);
     if (!session) {
-        NGLOG_ERROR(Kernel_SVC, "called with invalid handle=0x{:08X}", handle);
+        LOG_ERROR(Kernel_SVC, "called with invalid handle=0x{:08X}", handle);
         return ERR_INVALID_HANDLE;
     }
 
-    NGLOG_TRACE(Kernel_SVC, "called handle=0x{:08X}({})", handle, session->GetName());
+    LOG_TRACE(Kernel_SVC, "called handle=0x{:08X}({})", handle, session->GetName());
 
     Core::System::GetInstance().PrepareReschedule();
 
@@ -105,7 +106,7 @@ static ResultCode SendSyncRequest(Handle handle) {
 
 /// Get the ID for the specified thread.
 static ResultCode GetThreadId(u32* thread_id, Handle thread_handle) {
-    NGLOG_TRACE(Kernel_SVC, "called thread=0x{:08X}", thread_handle);
+    LOG_TRACE(Kernel_SVC, "called thread=0x{:08X}", thread_handle);
 
     const SharedPtr<Thread> thread = g_handle_table.Get<Thread>(thread_handle);
     if (!thread) {
@@ -118,7 +119,7 @@ static ResultCode GetThreadId(u32* thread_id, Handle thread_handle) {
 
 /// Get the ID of the specified process
 static ResultCode GetProcessId(u32* process_id, Handle process_handle) {
-    NGLOG_TRACE(Kernel_SVC, "called process=0x{:08X}", process_handle);
+    LOG_TRACE(Kernel_SVC, "called process=0x{:08X}", process_handle);
 
     const SharedPtr<Process> process = g_handle_table.Get<Process>(process_handle);
     if (!process) {
@@ -148,8 +149,8 @@ static bool DefaultThreadWakeupCallback(ThreadWakeupReason reason, SharedPtr<Thr
 /// Wait for the given handles to synchronize, timeout after the specified nanoseconds
 static ResultCode WaitSynchronization(Handle* index, VAddr handles_address, u64 handle_count,
                                       s64 nano_seconds) {
-    NGLOG_TRACE(Kernel_SVC, "called handles_address=0x{:X}, handle_count={}, nano_seconds={}",
-                handles_address, handle_count, nano_seconds);
+    LOG_TRACE(Kernel_SVC, "called handles_address=0x{:X}, handle_count={}, nano_seconds={}",
+              handles_address, handle_count, nano_seconds);
 
     if (!Memory::IsValidVirtualAddress(handles_address))
         return ERR_INVALID_POINTER;
@@ -209,7 +210,7 @@ static ResultCode WaitSynchronization(Handle* index, VAddr handles_address, u64
 
 /// Resumes a thread waiting on WaitSynchronization
 static ResultCode CancelSynchronization(Handle thread_handle) {
-    NGLOG_TRACE(Kernel_SVC, "called thread=0x{:X}", thread_handle);
+    LOG_TRACE(Kernel_SVC, "called thread=0x{:X}", thread_handle);
 
     const SharedPtr<Thread> thread = g_handle_table.Get<Thread>(thread_handle);
     if (!thread) {
@@ -226,24 +227,24 @@ static ResultCode CancelSynchronization(Handle thread_handle) {
 /// Attempts to locks a mutex, creating it if it does not already exist
 static ResultCode ArbitrateLock(Handle holding_thread_handle, VAddr mutex_addr,
                                 Handle requesting_thread_handle) {
-    NGLOG_TRACE(Kernel_SVC,
-                "called holding_thread_handle=0x{:08X}, mutex_addr=0x{:X}, "
-                "requesting_current_thread_handle=0x{:08X}",
-                holding_thread_handle, mutex_addr, requesting_thread_handle);
+    LOG_TRACE(Kernel_SVC,
+              "called holding_thread_handle=0x{:08X}, mutex_addr=0x{:X}, "
+              "requesting_current_thread_handle=0x{:08X}",
+              holding_thread_handle, mutex_addr, requesting_thread_handle);
 
     return Mutex::TryAcquire(mutex_addr, holding_thread_handle, requesting_thread_handle);
 }
 
 /// Unlock a mutex
 static ResultCode ArbitrateUnlock(VAddr mutex_addr) {
-    NGLOG_TRACE(Kernel_SVC, "called mutex_addr=0x{:X}", mutex_addr);
+    LOG_TRACE(Kernel_SVC, "called mutex_addr=0x{:X}", mutex_addr);
 
     return Mutex::Release(mutex_addr);
 }
 
 /// Break program execution
 static void Break(u64 unk_0, u64 unk_1, u64 unk_2) {
-    NGLOG_CRITICAL(Debug_Emulated, "Emulated program broke execution!");
+    LOG_CRITICAL(Debug_Emulated, "Emulated program broke execution!");
     ASSERT(false);
 }
 
@@ -251,13 +252,13 @@ static void Break(u64 unk_0, u64 unk_1, u64 unk_2) {
 static void OutputDebugString(VAddr address, s32 len) {
     std::string str(len, '\0');
     Memory::ReadBlock(address, str.data(), str.size());
-    NGLOG_DEBUG(Debug_Emulated, "{}", str);
+    LOG_DEBUG(Debug_Emulated, "{}", str);
 }
 
 /// Gets system/memory information for the current process
 static ResultCode GetInfo(u64* result, u64 info_id, u64 handle, u64 info_sub_id) {
-    NGLOG_TRACE(Kernel_SVC, "called info_id=0x{:X}, info_sub_id=0x{:X}, handle=0x{:08X}", info_id,
-                info_sub_id, handle);
+    LOG_TRACE(Kernel_SVC, "called info_id=0x{:X}, info_sub_id=0x{:X}, handle=0x{:08X}", info_id,
+              info_sub_id, handle);
 
     auto& vm_manager = Core::CurrentProcess()->vm_manager;
 
@@ -308,12 +309,17 @@ static ResultCode GetInfo(u64* result, u64 info_id, u64 handle, u64 info_sub_id)
         *result = Core::CurrentProcess()->is_virtual_address_memory_enabled;
         break;
     case GetInfoType::TitleId:
-        NGLOG_WARNING(Kernel_SVC, "(STUBBED) Attempted to query titleid, returned 0");
+        LOG_WARNING(Kernel_SVC, "(STUBBED) Attempted to query titleid, returned 0");
         *result = 0;
         break;
     case GetInfoType::PrivilegedProcessId:
-        NGLOG_WARNING(Kernel_SVC,
-                      "(STUBBED) Attempted to query privileged process id bounds, returned 0");
+        LOG_WARNING(Kernel_SVC,
+                    "(STUBBED) Attempted to query privileged process id bounds, returned 0");
+        *result = 0;
+        break;
+    case GetInfoType::UserExceptionContextAddr:
+        LOG_WARNING(Kernel_SVC,
+                    "(STUBBED) Attempted to query user exception context address, returned 0");
         *result = 0;
         break;
     default:
@@ -325,14 +331,13 @@ static ResultCode GetInfo(u64* result, u64 info_id, u64 handle, u64 info_sub_id)
 
 /// Sets the thread activity
 static ResultCode SetThreadActivity(Handle handle, u32 unknown) {
-    NGLOG_WARNING(Kernel_SVC, "(STUBBED) called, handle=0x{:08X}, unknown=0x{:08X}", handle,
-                  unknown);
+    LOG_WARNING(Kernel_SVC, "(STUBBED) called, handle=0x{:08X}, unknown=0x{:08X}", handle, unknown);
     return RESULT_SUCCESS;
 }
 
 /// Gets the thread context
 static ResultCode GetThreadContext(Handle handle, VAddr addr) {
-    NGLOG_WARNING(Kernel_SVC, "(STUBBED) called, handle=0x{:08X}, addr=0x{:X}", handle, addr);
+    LOG_WARNING(Kernel_SVC, "(STUBBED) called, handle=0x{:08X}, addr=0x{:X}", handle, addr);
     return RESULT_SUCCESS;
 }
 
@@ -371,16 +376,15 @@ static ResultCode SetThreadPriority(Handle handle, u32 priority) {
 
 /// Get which CPU core is executing the current thread
 static u32 GetCurrentProcessorNumber() {
-    NGLOG_TRACE(Kernel_SVC, "called");
+    LOG_TRACE(Kernel_SVC, "called");
     return GetCurrentThread()->processor_id;
 }
 
 static ResultCode MapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 size,
                                   u32 permissions) {
-    NGLOG_TRACE(
-        Kernel_SVC,
-        "called, shared_memory_handle=0x{:X}, addr=0x{:X}, size=0x{:X}, permissions=0x{:08X}",
-        shared_memory_handle, addr, size, permissions);
+    LOG_TRACE(Kernel_SVC,
+              "called, shared_memory_handle=0x{:X}, addr=0x{:X}, size=0x{:X}, permissions=0x{:08X}",
+              shared_memory_handle, addr, size, permissions);
 
     SharedPtr<SharedMemory> shared_memory = g_handle_table.Get<SharedMemory>(shared_memory_handle);
     if (!shared_memory) {
@@ -400,15 +404,15 @@ static ResultCode MapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 s
         return shared_memory->Map(Core::CurrentProcess().get(), addr, permissions_type,
                                   MemoryPermission::DontCare);
     default:
-        NGLOG_ERROR(Kernel_SVC, "unknown permissions=0x{:08X}", permissions);
+        LOG_ERROR(Kernel_SVC, "unknown permissions=0x{:08X}", permissions);
     }
 
     return RESULT_SUCCESS;
 }
 
 static ResultCode UnmapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 size) {
-    NGLOG_WARNING(Kernel_SVC, "called, shared_memory_handle=0x{:08X}, addr=0x{:X}, size=0x{:X}",
-                  shared_memory_handle, addr, size);
+    LOG_WARNING(Kernel_SVC, "called, shared_memory_handle=0x{:08X}, addr=0x{:X}, size=0x{:X}",
+                shared_memory_handle, addr, size);
 
     SharedPtr<SharedMemory> shared_memory = g_handle_table.Get<SharedMemory>(shared_memory_handle);
 
@@ -436,19 +440,19 @@ static ResultCode QueryProcessMemory(MemoryInfo* memory_info, PageInfo* /*page_i
         memory_info->type = static_cast<u32>(vma->second.meminfo_state);
     }
 
-    NGLOG_TRACE(Kernel_SVC, "called process=0x{:08X} addr={:X}", process_handle, addr);
+    LOG_TRACE(Kernel_SVC, "called process=0x{:08X} addr={:X}", process_handle, addr);
     return RESULT_SUCCESS;
 }
 
 /// Query memory
 static ResultCode QueryMemory(MemoryInfo* memory_info, PageInfo* page_info, VAddr addr) {
-    NGLOG_TRACE(Kernel_SVC, "called, addr={:X}", addr);
+    LOG_TRACE(Kernel_SVC, "called, addr={:X}", addr);
     return QueryProcessMemory(memory_info, page_info, CurrentProcess, addr);
 }
 
 /// Exits the current process
 static void ExitProcess() {
-    NGLOG_INFO(Kernel_SVC, "Process {} exiting", Core::CurrentProcess()->process_id);
+    LOG_INFO(Kernel_SVC, "Process {} exiting", Core::CurrentProcess()->process_id);
 
     ASSERT_MSG(Core::CurrentProcess()->status == ProcessStatus::Running,
                "Process has already exited");
@@ -524,17 +528,17 @@ static ResultCode CreateThread(Handle* out_handle, VAddr entry_point, u64 arg, V
     Core::System::GetInstance().PrepareReschedule();
     Core::System::GetInstance().CpuCore(thread->processor_id).PrepareReschedule();
 
-    NGLOG_TRACE(Kernel_SVC,
-                "called entrypoint=0x{:08X} ({}), arg=0x{:08X}, stacktop=0x{:08X}, "
-                "threadpriority=0x{:08X}, processorid=0x{:08X} : created handle=0x{:08X}",
-                entry_point, name, arg, stack_top, priority, processor_id, *out_handle);
+    LOG_TRACE(Kernel_SVC,
+              "called entrypoint=0x{:08X} ({}), arg=0x{:08X}, stacktop=0x{:08X}, "
+              "threadpriority=0x{:08X}, processorid=0x{:08X} : created handle=0x{:08X}",
+              entry_point, name, arg, stack_top, priority, processor_id, *out_handle);
 
     return RESULT_SUCCESS;
 }
 
 /// Starts the thread for the provided handle
 static ResultCode StartThread(Handle thread_handle) {
-    NGLOG_TRACE(Kernel_SVC, "called thread=0x{:08X}", thread_handle);
+    LOG_TRACE(Kernel_SVC, "called thread=0x{:08X}", thread_handle);
 
     const SharedPtr<Thread> thread = g_handle_table.Get<Thread>(thread_handle);
     if (!thread) {
@@ -551,7 +555,7 @@ static ResultCode StartThread(Handle thread_handle) {
 
 /// Called when a thread exits
 static void ExitThread() {
-    NGLOG_TRACE(Kernel_SVC, "called, pc=0x{:08X}", Core::CurrentArmInterface().GetPC());
+    LOG_TRACE(Kernel_SVC, "called, pc=0x{:08X}", Core::CurrentArmInterface().GetPC());
 
     ExitCurrentThread();
     Core::System::GetInstance().PrepareReschedule();
@@ -559,7 +563,7 @@ static void ExitThread() {
 
 /// Sleep the current thread
 static void SleepThread(s64 nanoseconds) {
-    NGLOG_TRACE(Kernel_SVC, "called nanoseconds={}", nanoseconds);
+    LOG_TRACE(Kernel_SVC, "called nanoseconds={}", nanoseconds);
 
     // Don't attempt to yield execution if there are no available threads to run,
     // this way we avoid a useless reschedule to the idle thread.
@@ -575,10 +579,10 @@ static void SleepThread(s64 nanoseconds) {
     Core::System::GetInstance().PrepareReschedule();
 }
 
-/// Signal process wide key atomic
+/// Wait process wide key atomic
 static ResultCode WaitProcessWideKeyAtomic(VAddr mutex_addr, VAddr condition_variable_addr,
                                            Handle thread_handle, s64 nano_seconds) {
-    NGLOG_TRACE(
+    LOG_TRACE(
         Kernel_SVC,
         "called mutex_addr={:X}, condition_variable_addr={:X}, thread_handle=0x{:08X}, timeout={}",
         mutex_addr, condition_variable_addr, thread_handle, nano_seconds);
@@ -605,8 +609,8 @@ static ResultCode WaitProcessWideKeyAtomic(VAddr mutex_addr, VAddr condition_var
 
 /// Signal process wide key
 static ResultCode SignalProcessWideKey(VAddr condition_variable_addr, s32 target) {
-    NGLOG_TRACE(Kernel_SVC, "called, condition_variable_addr=0x{:X}, target=0x{:08X}",
-                condition_variable_addr, target);
+    LOG_TRACE(Kernel_SVC, "called, condition_variable_addr=0x{:X}, target=0x{:08X}",
+              condition_variable_addr, target);
 
     auto RetrieveWaitingThreads =
         [](size_t core_index, std::vector<SharedPtr<Thread>>& waiting_threads, VAddr condvar_addr) {
@@ -684,6 +688,57 @@ static ResultCode SignalProcessWideKey(VAddr condition_variable_addr, s32 target
     return RESULT_SUCCESS;
 }
 
+// Wait for an address (via Address Arbiter)
+static ResultCode WaitForAddress(VAddr address, u32 type, s32 value, s64 timeout) {
+    LOG_WARNING(Kernel_SVC, "called, address=0x{:X}, type=0x{:X}, value=0x{:X}, timeout={}",
+                address, type, value, timeout);
+    // If the passed address is a kernel virtual address, return invalid memory state.
+    if (Memory::IsKernelVirtualAddress(address)) {
+        return ERR_INVALID_ADDRESS_STATE;
+    }
+    // If the address is not properly aligned to 4 bytes, return invalid address.
+    if (address % sizeof(u32) != 0) {
+        return ERR_INVALID_ADDRESS;
+    }
+
+    switch (static_cast<AddressArbiter::ArbitrationType>(type)) {
+    case AddressArbiter::ArbitrationType::WaitIfLessThan:
+        return AddressArbiter::WaitForAddressIfLessThan(address, value, timeout, false);
+    case AddressArbiter::ArbitrationType::DecrementAndWaitIfLessThan:
+        return AddressArbiter::WaitForAddressIfLessThan(address, value, timeout, true);
+    case AddressArbiter::ArbitrationType::WaitIfEqual:
+        return AddressArbiter::WaitForAddressIfEqual(address, value, timeout);
+    default:
+        return ERR_INVALID_ENUM_VALUE;
+    }
+}
+
+// Signals to an address (via Address Arbiter)
+static ResultCode SignalToAddress(VAddr address, u32 type, s32 value, s32 num_to_wake) {
+    LOG_WARNING(Kernel_SVC, "called, address=0x{:X}, type=0x{:X}, value=0x{:X}, num_to_wake=0x{:X}",
+                address, type, value, num_to_wake);
+    // If the passed address is a kernel virtual address, return invalid memory state.
+    if (Memory::IsKernelVirtualAddress(address)) {
+        return ERR_INVALID_ADDRESS_STATE;
+    }
+    // If the address is not properly aligned to 4 bytes, return invalid address.
+    if (address % sizeof(u32) != 0) {
+        return ERR_INVALID_ADDRESS;
+    }
+
+    switch (static_cast<AddressArbiter::SignalType>(type)) {
+    case AddressArbiter::SignalType::Signal:
+        return AddressArbiter::SignalToAddress(address, num_to_wake);
+    case AddressArbiter::SignalType::IncrementAndSignalIfEqual:
+        return AddressArbiter::IncrementAndSignalToAddressIfEqual(address, value, num_to_wake);
+    case AddressArbiter::SignalType::ModifyByWaitingCountAndSignalIfEqual:
+        return AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(address, value,
+                                                                             num_to_wake);
+    default:
+        return ERR_INVALID_ENUM_VALUE;
+    }
+}
+
 /// This returns the total CPU ticks elapsed since the CPU was powered-on
 static u64 GetSystemTick() {
     const u64 result{CoreTiming::GetTicks()};
@@ -696,13 +751,13 @@ static u64 GetSystemTick() {
 
 /// Close a handle
 static ResultCode CloseHandle(Handle handle) {
-    NGLOG_TRACE(Kernel_SVC, "Closing handle 0x{:08X}", handle);
+    LOG_TRACE(Kernel_SVC, "Closing handle 0x{:08X}", handle);
     return g_handle_table.Close(handle);
 }
 
 /// Reset an event
 static ResultCode ResetSignal(Handle handle) {
-    NGLOG_WARNING(Kernel_SVC, "(STUBBED) called handle 0x{:08X}", handle);
+    LOG_WARNING(Kernel_SVC, "(STUBBED) called handle 0x{:08X}", handle);
     auto event = g_handle_table.Get<Event>(handle);
     ASSERT(event != nullptr);
     event->Clear();
@@ -711,14 +766,14 @@ static ResultCode ResetSignal(Handle handle) {
 
 /// Creates a TransferMemory object
 static ResultCode CreateTransferMemory(Handle* handle, VAddr addr, u64 size, u32 permissions) {
-    NGLOG_WARNING(Kernel_SVC, "(STUBBED) called addr=0x{:X}, size=0x{:X}, perms=0x{:08X}", addr,
-                  size, permissions);
+    LOG_WARNING(Kernel_SVC, "(STUBBED) called addr=0x{:X}, size=0x{:X}, perms=0x{:08X}", addr, size,
+                permissions);
     *handle = 0;
     return RESULT_SUCCESS;
 }
 
 static ResultCode GetThreadCoreMask(Handle thread_handle, u32* core, u64* mask) {
-    NGLOG_TRACE(Kernel_SVC, "called, handle=0x{:08X}", thread_handle);
+    LOG_TRACE(Kernel_SVC, "called, handle=0x{:08X}", thread_handle);
 
     const SharedPtr<Thread> thread = g_handle_table.Get<Thread>(thread_handle);
     if (!thread) {
@@ -732,14 +787,39 @@ static ResultCode GetThreadCoreMask(Handle thread_handle, u32* core, u64* mask)
 }
 
 static ResultCode SetThreadCoreMask(Handle thread_handle, u32 core, u64 mask) {
-    NGLOG_TRACE(Kernel_SVC, "called, handle=0x{:08X}, mask=0x{:08X}, core=0x{:X}", thread_handle,
-                mask, core);
+    LOG_DEBUG(Kernel_SVC, "called, handle=0x{:08X}, mask=0x{:16X}, core=0x{:X}", thread_handle,
+              mask, core);
 
     const SharedPtr<Thread> thread = g_handle_table.Get<Thread>(thread_handle);
     if (!thread) {
         return ERR_INVALID_HANDLE;
     }
 
+    if (core == THREADPROCESSORID_DEFAULT) {
+        ASSERT(thread->owner_process->ideal_processor != THREADPROCESSORID_DEFAULT);
+        // Set the target CPU to the one specified in the process' exheader.
+        core = thread->owner_process->ideal_processor;
+        mask = 1ull << core;
+    }
+
+    if (mask == 0) {
+        return ResultCode(ErrorModule::Kernel, ErrCodes::InvalidCombination);
+    }
+
+    /// This value is used to only change the affinity mask without changing the current ideal core.
+    static constexpr u32 OnlyChangeMask = static_cast<u32>(-3);
+
+    if (core == OnlyChangeMask) {
+        core = thread->ideal_core;
+    } else if (core >= Core::NUM_CPU_CORES && core != -1) {
+        return ResultCode(ErrorModule::Kernel, ErrCodes::InvalidProcessorId);
+    }
+
+    // Error out if the input core isn't enabled in the input mask.
+    if (core < Core::NUM_CPU_CORES && (mask & (1ull << core)) == 0) {
+        return ResultCode(ErrorModule::Kernel, ErrCodes::InvalidCombination);
+    }
+
     thread->ChangeCore(core, mask);
 
     return RESULT_SUCCESS;
@@ -747,8 +827,8 @@ static ResultCode SetThreadCoreMask(Handle thread_handle, u32 core, u64 mask) {
 
 static ResultCode CreateSharedMemory(Handle* handle, u64 size, u32 local_permissions,
                                      u32 remote_permissions) {
-    NGLOG_TRACE(Kernel_SVC, "called, size=0x{:X}, localPerms=0x{:08X}, remotePerms=0x{:08X}", size,
-                local_permissions, remote_permissions);
+    LOG_TRACE(Kernel_SVC, "called, size=0x{:X}, localPerms=0x{:08X}, remotePerms=0x{:08X}", size,
+              local_permissions, remote_permissions);
     auto sharedMemHandle =
         SharedMemory::Create(g_handle_table.Get<Process>(KernelHandle::CurrentProcess), size,
                              static_cast<MemoryPermission>(local_permissions),
@@ -759,7 +839,7 @@ static ResultCode CreateSharedMemory(Handle* handle, u64 size, u32 local_permiss
 }
 
 static ResultCode ClearEvent(Handle handle) {
-    NGLOG_TRACE(Kernel_SVC, "called, event=0x{:08X}", handle);
+    LOG_TRACE(Kernel_SVC, "called, event=0x{:08X}", handle);
 
     SharedPtr<Event> evt = g_handle_table.Get<Event>(handle);
     if (evt == nullptr)
@@ -831,8 +911,8 @@ static const FunctionDef SVC_Table[] = {
     {0x31, nullptr, "GetResourceLimitCurrentValue"},
     {0x32, SvcWrap<SetThreadActivity>, "SetThreadActivity"},
     {0x33, SvcWrap<GetThreadContext>, "GetThreadContext"},
-    {0x34, nullptr, "WaitForAddress"},
-    {0x35, nullptr, "SignalToAddress"},
+    {0x34, SvcWrap<WaitForAddress>, "WaitForAddress"},
+    {0x35, SvcWrap<SignalToAddress>, "SignalToAddress"},
     {0x36, nullptr, "Unknown"},
     {0x37, nullptr, "Unknown"},
     {0x38, nullptr, "Unknown"},
@@ -911,7 +991,7 @@ static const FunctionDef SVC_Table[] = {
 
 static const FunctionDef* GetSVCInfo(u32 func_num) {
     if (func_num >= std::size(SVC_Table)) {
-        NGLOG_ERROR(Kernel_SVC, "Unknown svc=0x{:02X}", func_num);
+        LOG_ERROR(Kernel_SVC, "Unknown svc=0x{:02X}", func_num);
         return nullptr;
     }
     return &SVC_Table[func_num];
@@ -930,10 +1010,10 @@ void CallSVC(u32 immediate) {
         if (info->func) {
             info->func();
         } else {
-            NGLOG_CRITICAL(Kernel_SVC, "Unimplemented SVC function {}(..)", info->name);
+            LOG_CRITICAL(Kernel_SVC, "Unimplemented SVC function {}(..)", info->name);
         }
     } else {
-        NGLOG_CRITICAL(Kernel_SVC, "Unknown SVC function 0x{:X}", immediate);
+        LOG_CRITICAL(Kernel_SVC, "Unknown SVC function 0x{:X}", immediate);
     }
 }
 

src/core/hle/kernel/svc.h

@@ -47,9 +47,12 @@ enum class GetInfoType : u64 {
     NewMapRegionSize = 15,
     // 3.0.0+
     IsVirtualAddressMemoryEnabled = 16,
+    PersonalMmHeapUsage = 17,
     TitleId = 18,
     // 4.0.0+
     PrivilegedProcessId = 19,
+    // 5.0.0+
+    UserExceptionContextAddr = 20,
 };
 
 void CallSVC(u32 immediate);

src/core/hle/kernel/svc_wrap.h

@@ -179,6 +179,20 @@ void SvcWrap() {
     FuncReturn(retval);
 }
 
+template <ResultCode func(u64, u32, s32, s64)>
+void SvcWrap() {
+    FuncReturn(
+        func(PARAM(0), (u32)(PARAM(1) & 0xFFFFFFFF), (s32)(PARAM(2) & 0xFFFFFFFF), (s64)PARAM(3))
+            .raw);
+}
+
+template <ResultCode func(u64, u32, s32, s32)>
+void SvcWrap() {
+    FuncReturn(func(PARAM(0), (u32)(PARAM(1) & 0xFFFFFFFF), (s32)(PARAM(2) & 0xFFFFFFFF),
+                    (s32)(PARAM(3) & 0xFFFFFFFF))
+                   .raw);
+}
+
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Function wrappers that return type u32
 

src/core/hle/kernel/thread.cpp

@@ -104,7 +104,7 @@ static void ThreadWakeupCallback(u64 thread_handle, int cycles_late) {
     const auto proper_handle = static_cast<Handle>(thread_handle);
     SharedPtr<Thread> thread = wakeup_callback_handle_table.Get<Thread>(proper_handle);
     if (thread == nullptr) {
-        NGLOG_CRITICAL(Kernel, "Callback fired for invalid thread {:08X}", proper_handle);
+        LOG_CRITICAL(Kernel, "Callback fired for invalid thread {:08X}", proper_handle);
         return;
     }
 
@@ -133,8 +133,16 @@ static void ThreadWakeupCallback(u64 thread_handle, int cycles_late) {
 
         auto lock_owner = thread->lock_owner;
         // Threads waking up by timeout from WaitProcessWideKey do not perform priority inheritance
-        // and don't have a lock owner.
-        ASSERT(lock_owner == nullptr);
+        // and don't have a lock owner unless SignalProcessWideKey was called first and the thread
+        // wasn't awakened due to the mutex already being acquired.
+        if (lock_owner) {
+            lock_owner->RemoveMutexWaiter(thread);
+        }
+    }
+
+    if (thread->arb_wait_address != 0) {
+        ASSERT(thread->status == THREADSTATUS_WAIT_ARB);
+        thread->arb_wait_address = 0;
     }
 
     if (resume)
@@ -176,6 +184,7 @@ void Thread::ResumeFromWait() {
     case THREADSTATUS_WAIT_SLEEP:
     case THREADSTATUS_WAIT_IPC:
     case THREADSTATUS_WAIT_MUTEX:
+    case THREADSTATUS_WAIT_ARB:
         break;
 
     case THREADSTATUS_READY:
@@ -281,19 +290,19 @@ ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point,
                                             SharedPtr<Process> owner_process) {
     // Check if priority is in ranged. Lowest priority -> highest priority id.
     if (priority > THREADPRIO_LOWEST) {
-        NGLOG_ERROR(Kernel_SVC, "Invalid thread priority: {}", priority);
+        LOG_ERROR(Kernel_SVC, "Invalid thread priority: {}", priority);
         return ERR_OUT_OF_RANGE;
     }
 
     if (processor_id > THREADPROCESSORID_MAX) {
-        NGLOG_ERROR(Kernel_SVC, "Invalid processor id: {}", processor_id);
+        LOG_ERROR(Kernel_SVC, "Invalid processor id: {}", processor_id);
         return ERR_OUT_OF_RANGE_KERNEL;
     }
 
     // TODO(yuriks): Other checks, returning 0xD9001BEA
 
     if (!Memory::IsValidVirtualAddress(*owner_process, entry_point)) {
-        NGLOG_ERROR(Kernel_SVC, "(name={}): invalid entry {:016X}", name, entry_point);
+        LOG_ERROR(Kernel_SVC, "(name={}): invalid entry {:016X}", name, entry_point);
         // TODO (bunnei): Find the correct error code to use here
         return ResultCode(-1);
     }
@@ -334,8 +343,8 @@ ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point,
         auto& linheap_memory = memory_region->linear_heap_memory;
 
         if (linheap_memory->size() + Memory::PAGE_SIZE > memory_region->size) {
-            NGLOG_ERROR(Kernel_SVC,
-                        "Not enough space in region to allocate a new TLS page for thread");
+            LOG_ERROR(Kernel_SVC,
+                      "Not enough space in region to allocate a new TLS page for thread");
             return ERR_OUT_OF_MEMORY;
         }
 
@@ -460,13 +469,13 @@ void Thread::UpdatePriority() {
 
 void Thread::ChangeCore(u32 core, u64 mask) {
     ideal_core = core;
-    mask = mask;
+    affinity_mask = mask;
 
     if (status != THREADSTATUS_READY) {
         return;
     }
 
-    boost::optional<s32> new_processor_id{GetNextProcessorId(mask)};
+    boost::optional<s32> new_processor_id{GetNextProcessorId(affinity_mask)};
 
     if (!new_processor_id) {
         new_processor_id = processor_id;
@@ -476,7 +485,7 @@ void Thread::ChangeCore(u32 core, u64 mask) {
         new_processor_id = ideal_core;
     }
 
-    ASSERT(new_processor_id < 4);
+    ASSERT(*new_processor_id < 4);
 
     // Add thread to new core's scheduler
     auto& next_scheduler = Core::System().GetInstance().Scheduler(*new_processor_id);

src/core/hle/kernel/thread.h

@@ -45,6 +45,7 @@ enum ThreadStatus {
     THREADSTATUS_WAIT_SYNCH_ANY, ///< Waiting due to WaitSynch1 or WaitSynchN with wait_all = false
     THREADSTATUS_WAIT_SYNCH_ALL, ///< Waiting due to WaitSynchronizationN with wait_all = true
     THREADSTATUS_WAIT_MUTEX,     ///< Waiting due to an ArbitrateLock/WaitProcessWideKey svc
+    THREADSTATUS_WAIT_ARB,       ///< Waiting due to a SignalToAddress/WaitForAddress svc
     THREADSTATUS_DORMANT,        ///< Created but not yet made ready
     THREADSTATUS_DEAD            ///< Run to completion, or forcefully terminated
 };
@@ -230,6 +231,9 @@ public:
     VAddr mutex_wait_address; ///< If waiting on a Mutex, this is the mutex address
     Handle wait_handle;       ///< The handle used to wait for the mutex.
 
+    // If waiting for an AddressArbiter, this is the address being waited on.
+    VAddr arb_wait_address{0};
+
     std::string name;
 
     /// Handle used by guest emulated application to access this thread

src/core/hle/kernel/timer.cpp

@@ -78,7 +78,7 @@ void Timer::WakeupAllWaitingThreads() {
 }
 
 void Timer::Signal(int cycles_late) {
-    NGLOG_TRACE(Kernel, "Timer {} fired", GetObjectId());
+    LOG_TRACE(Kernel, "Timer {} fired", GetObjectId());
 
     signaled = true;
 
@@ -98,7 +98,7 @@ static void TimerCallback(u64 timer_handle, int cycles_late) {
         timer_callback_handle_table.Get<Timer>(static_cast<Handle>(timer_handle));
 
     if (timer == nullptr) {
-        NGLOG_CRITICAL(Kernel, "Callback fired for invalid timer {:016X}", timer_handle);
+        LOG_CRITICAL(Kernel, "Callback fired for invalid timer {:016X}", timer_handle);
         return;
     }
 

src/core/hle/kernel/vm_manager.cpp

@@ -242,12 +242,12 @@ void VMManager::RefreshMemoryBlockMappings(const std::vector<u8>* block) {
 void VMManager::LogLayout() const {
     for (const auto& p : vma_map) {
         const VirtualMemoryArea& vma = p.second;
-        NGLOG_DEBUG(Kernel, "{:016X} - {:016X} size: {:016X} {}{}{} {}", vma.base,
-                    vma.base + vma.size, vma.size,
-                    (u8)vma.permissions & (u8)VMAPermission::Read ? 'R' : '-',
-                    (u8)vma.permissions & (u8)VMAPermission::Write ? 'W' : '-',
-                    (u8)vma.permissions & (u8)VMAPermission::Execute ? 'X' : '-',
-                    GetMemoryStateName(vma.meminfo_state));
+        LOG_DEBUG(Kernel, "{:016X} - {:016X} size: {:016X} {}{}{} {}", vma.base,
+                  vma.base + vma.size, vma.size,
+                  (u8)vma.permissions & (u8)VMAPermission::Read ? 'R' : '-',
+                  (u8)vma.permissions & (u8)VMAPermission::Write ? 'W' : '-',
+                  (u8)vma.permissions & (u8)VMAPermission::Execute ? 'X' : '-',
+                  GetMemoryStateName(vma.meminfo_state));
     }
 }
 
@@ -392,22 +392,22 @@ void VMManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) {
 }
 
 u64 VMManager::GetTotalMemoryUsage() {
-    NGLOG_WARNING(Kernel, "(STUBBED) called");
+    LOG_WARNING(Kernel, "(STUBBED) called");
     return 0xF8000000;
 }
 
 u64 VMManager::GetTotalHeapUsage() {
-    NGLOG_WARNING(Kernel, "(STUBBED) called");
+    LOG_WARNING(Kernel, "(STUBBED) called");
     return 0x0;
 }
 
 VAddr VMManager::GetAddressSpaceBaseAddr() {
-    NGLOG_WARNING(Kernel, "(STUBBED) called");
+    LOG_WARNING(Kernel, "(STUBBED) called");
     return 0x8000000;
 }
 
 u64 VMManager::GetAddressSpaceSize() {
-    NGLOG_WARNING(Kernel, "(STUBBED) called");
+    LOG_WARNING(Kernel, "(STUBBED) called");
     return MAX_ADDRESS;
 }
 

src/core/hle/result.h

@@ -32,7 +32,8 @@ enum class ErrorModule : u32 {
     Common = 0,
     Kernel = 1,
     FS = 2,
-    NvidiaTransferMemory = 3,
+    OS = 3, // used for Memory, Thread, Mutex, Nvidia
+    HTCS = 4,
     NCM = 5,
     DD = 6,
     LR = 8,
@@ -62,6 +63,7 @@ enum class ErrorModule : u32 {
     NFP = 115,
     Time = 116,
     FGM = 117,
+    OE = 118,
     PCIe = 120,
     Friends = 121,
     BCAT = 122,
@@ -89,12 +91,14 @@ enum class ErrorModule : u32 {
     NGC = 146,
     ERPT = 147,
     APM = 148,
+    Profiler = 150,
     ErrorUpload = 151,
     Audio = 153,
     NPNS = 154,
     NPNSHTTPSTREAM = 155,
     ARP = 157,
-    BOOT = 158,
+    SWKBD = 158,
+    BOOT = 159,
     NFCMifare = 161,
     UserlandAssert = 162,
     Fatal = 163,
@@ -103,11 +107,13 @@ enum class ErrorModule : u32 {
     BGTC = 167,
     UserlandCrash = 168,
     SREPO = 180,
+    Dauth = 181,
     HID = 202,
     LDN = 203,
     Irsensor = 205,
     Capture = 206,
     Manu = 208,
+    ATK = 209,
     GRC = 212,
     Migration = 216,
     MigrationLdcServ = 217,

src/core/hle/service/acc/acc.cpp

@@ -47,7 +47,7 @@ public:
 
 private:
     void GetBase(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_ACC, "(STUBBED) called");
+        LOG_WARNING(Service_ACC, "(STUBBED) called");
         ProfileBase profile_base{};
         IPC::ResponseBuilder rb{ctx, 16};
         rb.Push(RESULT_SUCCESS);
@@ -72,14 +72,14 @@ public:
 
 private:
     void CheckAvailability(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_ACC, "(STUBBED) called");
+        LOG_WARNING(Service_ACC, "(STUBBED) called");
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
         rb.Push(true); // TODO: Check when this is supposed to return true and when not
     }
 
     void GetAccountId(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_ACC, "(STUBBED) called");
+        LOG_WARNING(Service_ACC, "(STUBBED) called");
         IPC::ResponseBuilder rb{ctx, 4};
         rb.Push(RESULT_SUCCESS);
         rb.Push<u64>(0x12345678ABCDEF);
@@ -87,14 +87,14 @@ private:
 };
 
 void Module::Interface::GetUserExistence(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_ACC, "(STUBBED) called");
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(RESULT_SUCCESS);
     rb.Push(true); // TODO: Check when this is supposed to return true and when not
 }
 
 void Module::Interface::ListAllUsers(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_ACC, "(STUBBED) called");
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
     constexpr std::array<u128, 10> user_ids{DEFAULT_USER_ID};
     ctx.WriteBuffer(user_ids.data(), user_ids.size());
     IPC::ResponseBuilder rb{ctx, 2};
@@ -102,7 +102,7 @@ void Module::Interface::ListAllUsers(Kernel::HLERequestContext& ctx) {
 }
 
 void Module::Interface::ListOpenUsers(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_ACC, "(STUBBED) called");
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
     constexpr std::array<u128, 10> user_ids{DEFAULT_USER_ID};
     ctx.WriteBuffer(user_ids.data(), user_ids.size());
     IPC::ResponseBuilder rb{ctx, 2};
@@ -113,11 +113,11 @@ void Module::Interface::GetProfile(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<IProfile>();
-    NGLOG_DEBUG(Service_ACC, "called");
+    LOG_DEBUG(Service_ACC, "called");
 }
 
 void Module::Interface::InitializeApplicationInfo(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_ACC, "(STUBBED) called");
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 }
@@ -126,11 +126,11 @@ void Module::Interface::GetBaasAccountManagerForApplication(Kernel::HLERequestCo
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<IManagerForApplication>();
-    NGLOG_DEBUG(Service_ACC, "called");
+    LOG_DEBUG(Service_ACC, "called");
 }
 
 void Module::Interface::GetLastOpenedUser(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_ACC, "(STUBBED) called");
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 6};
     rb.Push(RESULT_SUCCESS);
     rb.PushRaw(DEFAULT_USER_ID);

src/core/hle/service/am/am.cpp

@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <cinttypes>
+#include <stack>
 #include "core/file_sys/filesystem.h"
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/kernel/event.h"
@@ -29,14 +30,14 @@ IWindowController::IWindowController() : ServiceFramework("IWindowController") {
 }
 
 void IWindowController::GetAppletResourceUserId(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 4};
     rb.Push(RESULT_SUCCESS);
     rb.Push<u64>(0);
 }
 
 void IWindowController::AcquireForegroundRights(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 }
@@ -55,26 +56,59 @@ IAudioController::IAudioController() : ServiceFramework("IAudioController") {
 }
 
 void IAudioController::SetExpectedMasterVolume(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 }
 
 void IAudioController::GetMainAppletExpectedMasterVolume(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(RESULT_SUCCESS);
     rb.Push(volume);
 }
 
 void IAudioController::GetLibraryAppletExpectedMasterVolume(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(RESULT_SUCCESS);
     rb.Push(volume);
 }
 
-IDisplayController::IDisplayController() : ServiceFramework("IDisplayController") {}
+IDisplayController::IDisplayController() : ServiceFramework("IDisplayController") {
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "GetLastForegroundCaptureImage"},
+        {1, nullptr, "UpdateLastForegroundCaptureImage"},
+        {2, nullptr, "GetLastApplicationCaptureImage"},
+        {3, nullptr, "GetCallerAppletCaptureImage"},
+        {4, nullptr, "UpdateCallerAppletCaptureImage"},
+        {5, nullptr, "GetLastForegroundCaptureImageEx"},
+        {6, nullptr, "GetLastApplicationCaptureImageEx"},
+        {7, nullptr, "GetCallerAppletCaptureImageEx"},
+        {8, nullptr, "TakeScreenShotOfOwnLayer"},  // 2.0.0+
+        {9, nullptr, "CopyBetweenCaptureBuffers"}, // 5.0.0+
+        {10, nullptr, "AcquireLastApplicationCaptureBuffer"},
+        {11, nullptr, "ReleaseLastApplicationCaptureBuffer"},
+        {12, nullptr, "AcquireLastForegroundCaptureBuffer"},
+        {13, nullptr, "ReleaseLastForegroundCaptureBuffer"},
+        {14, nullptr, "AcquireCallerAppletCaptureBuffer"},
+        {15, nullptr, "ReleaseCallerAppletCaptureBuffer"},
+        {16, nullptr, "AcquireLastApplicationCaptureBufferEx"},
+        {17, nullptr, "AcquireLastForegroundCaptureBufferEx"},
+        {18, nullptr, "AcquireCallerAppletCaptureBufferEx"},
+        // 2.0.0+
+        {20, nullptr, "ClearCaptureBuffer"},
+        {21, nullptr, "ClearAppletTransitionBuffer"},
+        // 4.0.0+
+        {22, nullptr, "AcquireLastApplicationCaptureSharedBuffer"},
+        {23, nullptr, "ReleaseLastApplicationCaptureSharedBuffer"},
+        {24, nullptr, "AcquireLastForegroundCaptureSharedBuffer"},
+        {25, nullptr, "ReleaseLastForegroundCaptureSharedBuffer"},
+        {26, nullptr, "AcquireCallerAppletCaptureSharedBuffer"},
+        {27, nullptr, "ReleaseCallerAppletCaptureSharedBuffer"},
+    };
+    RegisterHandlers(functions);
+}
 
 IDebugFunctions::IDebugFunctions() : ServiceFramework("IDebugFunctions") {}
 
@@ -121,7 +155,7 @@ ISelfController::ISelfController(std::shared_ptr<NVFlinger::NVFlinger> nvflinger
     RegisterHandlers(functions);
 
     launchable_event =
-        Kernel::Event::Create(Kernel::ResetType::OneShot, "ISelfController:LaunchableEvent");
+        Kernel::Event::Create(Kernel::ResetType::Sticky, "ISelfController:LaunchableEvent");
 }
 
 void ISelfController::SetFocusHandlingMode(Kernel::HLERequestContext& ctx) {
@@ -140,14 +174,14 @@ void ISelfController::SetFocusHandlingMode(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ISelfController::SetRestartMessageEnabled(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ISelfController::SetPerformanceModeChangedNotification(Kernel::HLERequestContext& ctx) {
@@ -158,14 +192,14 @@ void ISelfController::SetPerformanceModeChangedNotification(Kernel::HLERequestCo
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called flag={}", flag);
+    LOG_WARNING(Service_AM, "(STUBBED) called flag={}", flag);
 }
 
 void ISelfController::SetScreenShotPermission(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ISelfController::SetOperationModeChangedNotification(Kernel::HLERequestContext& ctx) {
@@ -176,7 +210,7 @@ void ISelfController::SetOperationModeChangedNotification(Kernel::HLERequestCont
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called flag={}", flag);
+    LOG_WARNING(Service_AM, "(STUBBED) called flag={}", flag);
 }
 
 void ISelfController::SetOutOfFocusSuspendingEnabled(Kernel::HLERequestContext& ctx) {
@@ -189,21 +223,21 @@ void ISelfController::SetOutOfFocusSuspendingEnabled(Kernel::HLERequestContext&
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called enabled={}", enabled);
+    LOG_WARNING(Service_AM, "(STUBBED) called enabled={}", enabled);
 }
 
 void ISelfController::LockExit(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ISelfController::UnlockExit(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ISelfController::GetLibraryAppletLaunchableEvent(Kernel::HLERequestContext& ctx) {
@@ -213,7 +247,7 @@ void ISelfController::GetLibraryAppletLaunchableEvent(Kernel::HLERequestContext&
     rb.Push(RESULT_SUCCESS);
     rb.PushCopyObjects(launchable_event);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ISelfController::CreateManagedDisplayLayer(Kernel::HLERequestContext& ctx) {
@@ -226,14 +260,14 @@ void ISelfController::CreateManagedDisplayLayer(Kernel::HLERequestContext& ctx)
     rb.Push(RESULT_SUCCESS);
     rb.Push(layer_id);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ISelfController::SetHandlesRequestToDisplay(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 ICommonStateGetter::ICommonStateGetter() : ServiceFramework("ICommonStateGetter") {
@@ -277,7 +311,7 @@ void ICommonStateGetter::GetEventHandle(Kernel::HLERequestContext& ctx) {
     rb.Push(RESULT_SUCCESS);
     rb.PushCopyObjects(event);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ICommonStateGetter::ReceiveMessage(Kernel::HLERequestContext& ctx) {
@@ -285,7 +319,7 @@ void ICommonStateGetter::ReceiveMessage(Kernel::HLERequestContext& ctx) {
     rb.Push(RESULT_SUCCESS);
     rb.Push<u32>(15);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ICommonStateGetter::GetCurrentFocusState(Kernel::HLERequestContext& ctx) {
@@ -293,7 +327,7 @@ void ICommonStateGetter::GetCurrentFocusState(Kernel::HLERequestContext& ctx) {
     rb.Push(RESULT_SUCCESS);
     rb.Push(static_cast<u8>(FocusState::InFocus));
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ICommonStateGetter::GetOperationMode(Kernel::HLERequestContext& ctx) {
@@ -302,7 +336,7 @@ void ICommonStateGetter::GetOperationMode(Kernel::HLERequestContext& ctx) {
     rb.Push(RESULT_SUCCESS);
     rb.Push(static_cast<u8>(use_docked_mode ? OperationMode::Docked : OperationMode::Handheld));
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void ICommonStateGetter::GetPerformanceMode(Kernel::HLERequestContext& ctx) {
@@ -312,22 +346,103 @@ void ICommonStateGetter::GetPerformanceMode(Kernel::HLERequestContext& ctx) {
     rb.Push(static_cast<u32>(use_docked_mode ? APM::PerformanceMode::Docked
                                              : APM::PerformanceMode::Handheld));
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
+class IStorageAccessor final : public ServiceFramework<IStorageAccessor> {
+public:
+    explicit IStorageAccessor(std::vector<u8> buffer)
+        : ServiceFramework("IStorageAccessor"), buffer(std::move(buffer)) {
+        static const FunctionInfo functions[] = {
+            {0, &IStorageAccessor::GetSize, "GetSize"},
+            {10, &IStorageAccessor::Write, "Write"},
+            {11, &IStorageAccessor::Read, "Read"},
+        };
+        RegisterHandlers(functions);
+    }
+
+private:
+    std::vector<u8> buffer;
+
+    void GetSize(Kernel::HLERequestContext& ctx) {
+        IPC::ResponseBuilder rb{ctx, 4};
+
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(static_cast<u64>(buffer.size()));
+
+        LOG_DEBUG(Service_AM, "called");
+    }
+
+    void Write(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+
+        const u64 offset{rp.Pop<u64>()};
+        const std::vector<u8> data{ctx.ReadBuffer()};
+
+        ASSERT(offset + data.size() <= buffer.size());
+
+        std::memcpy(&buffer[offset], data.data(), data.size());
+
+        IPC::ResponseBuilder rb{rp.MakeBuilder(2, 0, 0)};
+        rb.Push(RESULT_SUCCESS);
+
+        LOG_DEBUG(Service_AM, "called, offset={}", offset);
+    }
+
+    void Read(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+
+        const u64 offset{rp.Pop<u64>()};
+        const size_t size{ctx.GetWriteBufferSize()};
+
+        ASSERT(offset + size <= buffer.size());
+
+        ctx.WriteBuffer(buffer.data() + offset, size);
+
+        IPC::ResponseBuilder rb{rp.MakeBuilder(2, 0, 0)};
+        rb.Push(RESULT_SUCCESS);
+
+        LOG_DEBUG(Service_AM, "called, offset={}", offset);
+    }
+};
+
+class IStorage final : public ServiceFramework<IStorage> {
+public:
+    explicit IStorage(std::vector<u8> buffer)
+        : ServiceFramework("IStorage"), buffer(std::move(buffer)) {
+        static const FunctionInfo functions[] = {
+            {0, &IStorage::Open, "Open"},
+            {1, nullptr, "OpenTransferStorage"},
+        };
+        RegisterHandlers(functions);
+    }
+
+private:
+    std::vector<u8> buffer;
+
+    void Open(Kernel::HLERequestContext& ctx) {
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<AM::IStorageAccessor>(buffer);
+
+        LOG_DEBUG(Service_AM, "called");
+    }
+};
+
 class ILibraryAppletAccessor final : public ServiceFramework<ILibraryAppletAccessor> {
 public:
     explicit ILibraryAppletAccessor() : ServiceFramework("ILibraryAppletAccessor") {
         static const FunctionInfo functions[] = {
             {0, &ILibraryAppletAccessor::GetAppletStateChangedEvent, "GetAppletStateChangedEvent"},
             {1, nullptr, "IsCompleted"},
-            {10, nullptr, "Start"},
+            {10, &ILibraryAppletAccessor::Start, "Start"},
             {20, nullptr, "RequestExit"},
             {25, nullptr, "Terminate"},
-            {30, nullptr, "GetResult"},
+            {30, &ILibraryAppletAccessor::GetResult, "GetResult"},
             {50, nullptr, "SetOutOfFocusApplicationSuspendingEnabled"},
-            {100, nullptr, "PushInData"},
-            {101, nullptr, "PopOutData"},
+            {100, &ILibraryAppletAccessor::PushInData, "PushInData"},
+            {101, &ILibraryAppletAccessor::PopOutData, "PopOutData"},
             {102, nullptr, "PushExtraStorage"},
             {103, nullptr, "PushInteractiveInData"},
             {104, nullptr, "PopInteractiveOutData"},
@@ -352,9 +467,44 @@ private:
         rb.Push(RESULT_SUCCESS);
         rb.PushCopyObjects(state_changed_event);
 
-        NGLOG_WARNING(Service_AM, "(STUBBED) called");
+        LOG_WARNING(Service_AM, "(STUBBED) called");
     }
 
+    void GetResult(Kernel::HLERequestContext& ctx) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+
+        LOG_WARNING(Service_AM, "(STUBBED) called");
+    }
+
+    void Start(Kernel::HLERequestContext& ctx) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+
+        LOG_WARNING(Service_AM, "(STUBBED) called");
+    }
+
+    void PushInData(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+        storage_stack.push(rp.PopIpcInterface<AM::IStorage>());
+
+        IPC::ResponseBuilder rb{rp.MakeBuilder(2, 0, 0)};
+        rb.Push(RESULT_SUCCESS);
+
+        LOG_DEBUG(Service_AM, "called");
+    }
+
+    void PopOutData(Kernel::HLERequestContext& ctx) {
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<AM::IStorage>(std::move(storage_stack.top()));
+
+        storage_stack.pop();
+
+        LOG_DEBUG(Service_AM, "called");
+    }
+
+    std::stack<std::shared_ptr<AM::IStorage>> storage_stack;
     Kernel::SharedPtr<Kernel::Event> state_changed_event;
 };
 
@@ -363,7 +513,7 @@ ILibraryAppletCreator::ILibraryAppletCreator() : ServiceFramework("ILibraryApple
         {0, &ILibraryAppletCreator::CreateLibraryApplet, "CreateLibraryApplet"},
         {1, nullptr, "TerminateAllLibraryApplets"},
         {2, nullptr, "AreAnyLibraryAppletsLeft"},
-        {10, nullptr, "CreateStorage"},
+        {10, &ILibraryAppletCreator::CreateStorage, "CreateStorage"},
         {11, nullptr, "CreateTransferMemoryStorage"},
         {12, nullptr, "CreateHandleStorage"},
     };
@@ -376,75 +526,20 @@ void ILibraryAppletCreator::CreateLibraryApplet(Kernel::HLERequestContext& ctx)
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<AM::ILibraryAppletAccessor>();
 
-    NGLOG_DEBUG(Service_AM, "called");
+    LOG_DEBUG(Service_AM, "called");
 }
 
-class IStorageAccessor final : public ServiceFramework<IStorageAccessor> {
-public:
-    explicit IStorageAccessor(std::vector<u8> buffer)
-        : ServiceFramework("IStorageAccessor"), buffer(std::move(buffer)) {
-        static const FunctionInfo functions[] = {
-            {0, &IStorageAccessor::GetSize, "GetSize"},
-            {10, nullptr, "Write"},
-            {11, &IStorageAccessor::Read, "Read"},
-        };
-        RegisterHandlers(functions);
-    }
+void ILibraryAppletCreator::CreateStorage(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const u64 size{rp.Pop<u64>()};
+    std::vector<u8> buffer(size);
 
-private:
-    std::vector<u8> buffer;
+    IPC::ResponseBuilder rb{rp.MakeBuilder(2, 0, 1)};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<AM::IStorage>(std::move(buffer));
 
-    void GetSize(Kernel::HLERequestContext& ctx) {
-        IPC::ResponseBuilder rb{ctx, 4};
-
-        rb.Push(RESULT_SUCCESS);
-        rb.Push(static_cast<u64>(buffer.size()));
-
-        NGLOG_DEBUG(Service_AM, "called");
-    }
-
-    void Read(Kernel::HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-
-        u64 offset = rp.Pop<u64>();
-
-        const size_t size{ctx.GetWriteBufferSize()};
-
-        ASSERT(offset + size <= buffer.size());
-
-        ctx.WriteBuffer(buffer.data() + offset, size);
-
-        IPC::ResponseBuilder rb{ctx, 2};
-
-        rb.Push(RESULT_SUCCESS);
-
-        NGLOG_DEBUG(Service_AM, "called");
-    }
-};
-
-class IStorage final : public ServiceFramework<IStorage> {
-public:
-    explicit IStorage(std::vector<u8> buffer)
-        : ServiceFramework("IStorage"), buffer(std::move(buffer)) {
-        static const FunctionInfo functions[] = {
-            {0, &IStorage::Open, "Open"},
-            {1, nullptr, "OpenTransferStorage"},
-        };
-        RegisterHandlers(functions);
-    }
-
-private:
-    std::vector<u8> buffer;
-
-    void Open(Kernel::HLERequestContext& ctx) {
-        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-
-        rb.Push(RESULT_SUCCESS);
-        rb.PushIpcInterface<AM::IStorageAccessor>(buffer);
-
-        NGLOG_DEBUG(Service_AM, "called");
-    }
-};
+    LOG_DEBUG(Service_AM, "called, size={}", size);
+}
 
 IApplicationFunctions::IApplicationFunctions() : ServiceFramework("IApplicationFunctions") {
     static const FunctionInfo functions[] = {
@@ -457,7 +552,7 @@ IApplicationFunctions::IApplicationFunctions() : ServiceFramework("IApplicationF
         {20, &IApplicationFunctions::EnsureSaveData, "EnsureSaveData"},
         {21, &IApplicationFunctions::GetDesiredLanguage, "GetDesiredLanguage"},
         {22, &IApplicationFunctions::SetTerminateResult, "SetTerminateResult"},
-        {23, nullptr, "GetDisplayVersion"},
+        {23, &IApplicationFunctions::GetDisplayVersion, "GetDisplayVersion"},
         {24, nullptr, "GetLaunchStorageInfoForDebug"},
         {25, nullptr, "ExtendSaveData"},
         {26, nullptr, "GetSaveDataSize"},
@@ -466,7 +561,7 @@ IApplicationFunctions::IApplicationFunctions() : ServiceFramework("IApplicationF
         {32, nullptr, "BeginBlockingHomeButton"},
         {33, nullptr, "EndBlockingHomeButton"},
         {40, &IApplicationFunctions::NotifyRunning, "NotifyRunning"},
-        {50, nullptr, "GetPseudoDeviceId"},
+        {50, &IApplicationFunctions::GetPseudoDeviceId, "GetPseudoDeviceId"},
         {60, nullptr, "SetMediaPlaybackStateForApplication"},
         {65, nullptr, "IsGamePlayRecordingSupported"},
         {66, &IApplicationFunctions::InitializeGamePlayRecording, "InitializeGamePlayRecording"},
@@ -507,26 +602,26 @@ void IApplicationFunctions::PopLaunchParameter(Kernel::HLERequestContext& ctx) {
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<AM::IStorage>(buffer);
 
-    NGLOG_DEBUG(Service_AM, "called");
+    LOG_DEBUG(Service_AM, "called");
 }
 
 void IApplicationFunctions::CreateApplicationAndRequestToStartForQuest(
     Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void IApplicationFunctions::EnsureSaveData(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
     u128 uid = rp.PopRaw<u128>();
 
-    NGLOG_WARNING(Service, "(STUBBED) called uid = {:016X}{:016X}", uid[1], uid[0]);
+    LOG_WARNING(Service, "(STUBBED) called uid = {:016X}{:016X}", uid[1], uid[0]);
 
     IPC::ResponseBuilder rb{ctx, 4};
 
     FileSys::Path unused;
-    auto savedata = FileSystem::OpenFileSystem(FileSystem::Type::SaveData, unused);
+    auto savedata = FileSystem::OpenFileSystem(FileSystem::Type::SaveData);
     if (savedata.Failed()) {
         // Create the save data and return an error indicating that the operation was performed.
         FileSystem::FormatFileSystem(FileSystem::Type::SaveData);
@@ -549,7 +644,15 @@ void IApplicationFunctions::SetTerminateResult(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called, result=0x{:08X}", result);
+    LOG_WARNING(Service_AM, "(STUBBED) called, result=0x{:08X}", result);
+}
+
+void IApplicationFunctions::GetDisplayVersion(Kernel::HLERequestContext& ctx) {
+    IPC::ResponseBuilder rb{ctx, 6};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u64>(1);
+    rb.Push<u64>(0);
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void IApplicationFunctions::GetDesiredLanguage(Kernel::HLERequestContext& ctx) {
@@ -557,20 +660,20 @@ void IApplicationFunctions::GetDesiredLanguage(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 4};
     rb.Push(RESULT_SUCCESS);
     rb.Push(static_cast<u64>(Service::Set::LanguageCode::EN_US));
-    NGLOG_DEBUG(Service_AM, "called");
+    LOG_DEBUG(Service_AM, "called");
 }
 
 void IApplicationFunctions::InitializeGamePlayRecording(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void IApplicationFunctions::SetGamePlayRecordingState(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void IApplicationFunctions::NotifyRunning(Kernel::HLERequestContext& ctx) {
@@ -578,7 +681,18 @@ void IApplicationFunctions::NotifyRunning(Kernel::HLERequestContext& ctx) {
     rb.Push(RESULT_SUCCESS);
     rb.Push<u8>(0); // Unknown, seems to be ignored by official processes
 
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
+}
+
+void IApplicationFunctions::GetPseudoDeviceId(Kernel::HLERequestContext& ctx) {
+    IPC::ResponseBuilder rb{ctx, 6};
+    rb.Push(RESULT_SUCCESS);
+
+    // Returns a 128-bit UUID
+    rb.Push<u64>(0);
+    rb.Push<u64>(0);
+
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 void InstallInterfaces(SM::ServiceManager& service_manager,
@@ -603,7 +717,7 @@ IHomeMenuFunctions::IHomeMenuFunctions() : ServiceFramework("IHomeMenuFunctions"
 void IHomeMenuFunctions::RequestToGetForeground(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
-    NGLOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_WARNING(Service_AM, "(STUBBED) called");
 }
 
 IGlobalStateController::IGlobalStateController() : ServiceFramework("IGlobalStateController") {

src/core/hle/service/am/am.h

@@ -18,10 +18,25 @@ class NVFlinger;
 
 namespace AM {
 
-// TODO: Add more languages
 enum SystemLanguage {
     Japanese = 0,
-    English = 1,
+    English = 1, // en-US
+    French = 2,
+    German = 3,
+    Italian = 4,
+    Spanish = 5,
+    Chinese = 6,
+    Korean = 7,
+    Dutch = 8,
+    Portuguese = 9,
+    Russian = 10,
+    Taiwanese = 11,
+    BritishEnglish = 12, // en-GB
+    CanadianFrench = 13,
+    LatinAmericanSpanish = 14, // es-419
+    // 4.0.0+
+    SimplifiedChinese = 15,
+    TraditionalChinese = 16,
 };
 
 class IWindowController final : public ServiceFramework<IWindowController> {
@@ -106,6 +121,7 @@ public:
 
 private:
     void CreateLibraryApplet(Kernel::HLERequestContext& ctx);
+    void CreateStorage(Kernel::HLERequestContext& ctx);
 };
 
 class IApplicationFunctions final : public ServiceFramework<IApplicationFunctions> {
@@ -117,10 +133,12 @@ private:
     void CreateApplicationAndRequestToStartForQuest(Kernel::HLERequestContext& ctx);
     void EnsureSaveData(Kernel::HLERequestContext& ctx);
     void SetTerminateResult(Kernel::HLERequestContext& ctx);
+    void GetDisplayVersion(Kernel::HLERequestContext& ctx);
     void GetDesiredLanguage(Kernel::HLERequestContext& ctx);
     void InitializeGamePlayRecording(Kernel::HLERequestContext& ctx);
     void SetGamePlayRecordingState(Kernel::HLERequestContext& ctx);
     void NotifyRunning(Kernel::HLERequestContext& ctx);
+    void GetPseudoDeviceId(Kernel::HLERequestContext& ctx);
 };
 
 class IHomeMenuFunctions final : public ServiceFramework<IHomeMenuFunctions> {

src/core/hle/service/am/applet_ae.cpp

@@ -33,63 +33,63 @@ private:
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ICommonStateGetter>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetSelfController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ISelfController>(nvflinger);
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetWindowController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IWindowController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetAudioController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IAudioController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetDisplayController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IDisplayController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetProcessWindingController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IProcessWindingController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetDebugFunctions(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IDebugFunctions>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetLibraryAppletCreator(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ILibraryAppletCreator>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetApplicationFunctions(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IApplicationFunctions>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     std::shared_ptr<NVFlinger::NVFlinger> nvflinger;
@@ -120,70 +120,70 @@ private:
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ICommonStateGetter>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetSelfController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ISelfController>(nvflinger);
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetWindowController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IWindowController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetAudioController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IAudioController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetDisplayController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IDisplayController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetDebugFunctions(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IDebugFunctions>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetLibraryAppletCreator(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ILibraryAppletCreator>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetHomeMenuFunctions(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IHomeMenuFunctions>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetGlobalStateController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IGlobalStateController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetApplicationCreator(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IApplicationCreator>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
     std::shared_ptr<NVFlinger::NVFlinger> nvflinger;
 };
@@ -192,21 +192,21 @@ void AppletAE::OpenSystemAppletProxy(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<ISystemAppletProxy>(nvflinger);
-    NGLOG_DEBUG(Service_AM, "called");
+    LOG_DEBUG(Service_AM, "called");
 }
 
 void AppletAE::OpenLibraryAppletProxy(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<ILibraryAppletProxy>(nvflinger);
-    NGLOG_DEBUG(Service_AM, "called");
+    LOG_DEBUG(Service_AM, "called");
 }
 
 void AppletAE::OpenLibraryAppletProxyOld(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<ILibraryAppletProxy>(nvflinger);
-    NGLOG_DEBUG(Service_AM, "called");
+    LOG_DEBUG(Service_AM, "called");
 }
 
 AppletAE::AppletAE(std::shared_ptr<NVFlinger::NVFlinger> nvflinger)

src/core/hle/service/am/applet_oe.cpp

@@ -33,56 +33,56 @@ private:
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IAudioController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetDisplayController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IDisplayController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetDebugFunctions(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IDebugFunctions>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetWindowController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IWindowController>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetSelfController(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ISelfController>(nvflinger);
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetCommonStateGetter(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ICommonStateGetter>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetLibraryAppletCreator(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<ILibraryAppletCreator>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     void GetApplicationFunctions(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IApplicationFunctions>();
-        NGLOG_DEBUG(Service_AM, "called");
+        LOG_DEBUG(Service_AM, "called");
     }
 
     std::shared_ptr<NVFlinger::NVFlinger> nvflinger;
@@ -92,13 +92,13 @@ void AppletOE::OpenApplicationProxy(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<IApplicationProxy>(nvflinger);
-    NGLOG_DEBUG(Service_AM, "called");
+    LOG_DEBUG(Service_AM, "called");
 }
 
 AppletOE::AppletOE(std::shared_ptr<NVFlinger::NVFlinger> nvflinger)
     : ServiceFramework("appletOE"), nvflinger(std::move(nvflinger)) {
     static const FunctionInfo functions[] = {
-        {0x00000000, &AppletOE::OpenApplicationProxy, "OpenApplicationProxy"},
+        {0, &AppletOE::OpenApplicationProxy, "OpenApplicationProxy"},
     };
     RegisterHandlers(functions);
 }

src/core/hle/service/aoc/aoc_u.cpp

@@ -27,14 +27,14 @@ void AOC_U::CountAddOnContent(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 4};
     rb.Push(RESULT_SUCCESS);
     rb.Push<u64>(0);
-    NGLOG_WARNING(Service_AOC, "(STUBBED) called");
+    LOG_WARNING(Service_AOC, "(STUBBED) called");
 }
 
 void AOC_U::ListAddOnContent(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 4};
     rb.Push(RESULT_SUCCESS);
     rb.Push<u64>(0);
-    NGLOG_WARNING(Service_AOC, "(STUBBED) called");
+    LOG_WARNING(Service_AOC, "(STUBBED) called");
 }
 
 void InstallInterfaces(SM::ServiceManager& service_manager) {

src/core/hle/service/apm/interface.cpp

@@ -29,8 +29,8 @@ private:
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
 
-        NGLOG_WARNING(Service_APM, "(STUBBED) called mode={} config={}", static_cast<u32>(mode),
-                      config);
+        LOG_WARNING(Service_APM, "(STUBBED) called mode={} config={}", static_cast<u32>(mode),
+                    config);
     }
 
     void GetPerformanceConfiguration(Kernel::HLERequestContext& ctx) {
@@ -42,7 +42,7 @@ private:
         rb.Push(RESULT_SUCCESS);
         rb.Push<u32>(0); // Performance configuration
 
-        NGLOG_WARNING(Service_APM, "(STUBBED) called mode={}", static_cast<u32>(mode));
+        LOG_WARNING(Service_APM, "(STUBBED) called mode={}", static_cast<u32>(mode));
     }
 };
 

src/core/hle/service/audio/audio.cpp

@@ -8,6 +8,7 @@
 #include "core/hle/service/audio/audrec_u.h"
 #include "core/hle/service/audio/audren_u.h"
 #include "core/hle/service/audio/codecctl.h"
+#include "core/hle/service/audio/hwopus.h"
 
 namespace Service::Audio {
 
@@ -17,6 +18,7 @@ void InstallInterfaces(SM::ServiceManager& service_manager) {
     std::make_shared<AudRecU>()->InstallAsService(service_manager);
     std::make_shared<AudRenU>()->InstallAsService(service_manager);
     std::make_shared<CodecCtl>()->InstallAsService(service_manager);
+    std::make_shared<HwOpus>()->InstallAsService(service_manager);
 }
 
 } // namespace Service::Audio

src/core/hle/service/audio/audout_u.cpp

@@ -60,14 +60,14 @@ public:
 
 private:
     void GetAudioOutState(Kernel::HLERequestContext& ctx) {
-        NGLOG_DEBUG(Service_Audio, "called");
+        LOG_DEBUG(Service_Audio, "called");
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
         rb.Push(static_cast<u32>(audio_out_state));
     }
 
     void StartAudioOut(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
 
         // Start audio
         audio_out_state = AudioState::Started;
@@ -77,7 +77,7 @@ private:
     }
 
     void StopAudioOut(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
 
         // Stop audio
         audio_out_state = AudioState::Stopped;
@@ -89,7 +89,7 @@ private:
     }
 
     void RegisterBufferEvent(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
 
         IPC::ResponseBuilder rb{ctx, 2, 1};
         rb.Push(RESULT_SUCCESS);
@@ -97,7 +97,7 @@ private:
     }
 
     void AppendAudioOutBuffer(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
         IPC::RequestParser rp{ctx};
 
         const u64 key{rp.Pop<u64>()};
@@ -108,7 +108,7 @@ private:
     }
 
     void GetReleasedAudioOutBuffer(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
 
         // TODO(st4rk): This is how libtransistor currently implements the
         // GetReleasedAudioOutBuffer, it should return the key (a VAddr) to the app and this address
@@ -164,7 +164,7 @@ private:
 };
 
 void AudOutU::ListAudioOuts(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+    LOG_WARNING(Service_Audio, "(STUBBED) called");
     IPC::RequestParser rp{ctx};
 
     const std::string audio_interface = "AudioInterface";
@@ -180,7 +180,7 @@ void AudOutU::ListAudioOuts(Kernel::HLERequestContext& ctx) {
 }
 
 void AudOutU::OpenAudioOut(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+    LOG_WARNING(Service_Audio, "(STUBBED) called");
 
     if (!audio_out_interface) {
         audio_out_interface = std::make_shared<IAudioOut>();

src/core/hle/service/audio/audren_u.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/alignment.h"
 #include "common/logging/log.h"
 #include "core/core_timing.h"
 #include "core/hle/ipc_helpers.h"
@@ -16,7 +17,8 @@ constexpr u64 audio_ticks{static_cast<u64>(CoreTiming::BASE_CLOCK_RATE / 200)};
 
 class IAudioRenderer final : public ServiceFramework<IAudioRenderer> {
 public:
-    IAudioRenderer() : ServiceFramework("IAudioRenderer") {
+    IAudioRenderer(AudioRendererParameter audren_params)
+        : ServiceFramework("IAudioRenderer"), worker_params(audren_params) {
         static const FunctionInfo functions[] = {
             {0, nullptr, "GetAudioRendererSampleRate"},
             {1, nullptr, "GetAudioRendererSampleCount"},
@@ -45,6 +47,7 @@ public:
 
         // Start the audio event
         CoreTiming::ScheduleEvent(audio_ticks, audio_event);
+        voice_status_list.reserve(worker_params.voice_count);
     }
     ~IAudioRenderer() {
         CoreTiming::UnscheduleEvent(audio_event, 0);
@@ -56,30 +59,63 @@ private:
     }
 
     void RequestUpdateAudioRenderer(Kernel::HLERequestContext& ctx) {
-        NGLOG_DEBUG(Service_Audio, "{}", ctx.Description());
-        AudioRendererResponseData response_data{};
+        UpdateDataHeader config{};
+        auto buf = ctx.ReadBuffer();
+        std::memcpy(&config, buf.data(), sizeof(UpdateDataHeader));
+        u32 memory_pool_count = worker_params.effect_count + (worker_params.voice_count * 4);
 
-        response_data.section_0_size =
-            static_cast<u32>(response_data.state_entries.size() * sizeof(AudioRendererStateEntry));
-        response_data.section_1_size = static_cast<u32>(response_data.section_1.size());
-        response_data.section_2_size = static_cast<u32>(response_data.section_2.size());
-        response_data.section_3_size = static_cast<u32>(response_data.section_3.size());
-        response_data.section_4_size = static_cast<u32>(response_data.section_4.size());
-        response_data.section_5_size = static_cast<u32>(response_data.section_5.size());
-        response_data.total_size = sizeof(AudioRendererResponseData);
+        std::vector<MemoryPoolInfo> mem_pool_info(memory_pool_count);
+        std::memcpy(mem_pool_info.data(),
+                    buf.data() + sizeof(UpdateDataHeader) + config.behavior_size,
+                    memory_pool_count * sizeof(MemoryPoolInfo));
 
-        for (unsigned i = 0; i < response_data.state_entries.size(); i++) {
-            // 4 = Busy and 5 = Ready?
-            response_data.state_entries[i].state = 5;
+        std::vector<VoiceInfo> voice_info(worker_params.voice_count);
+        std::memcpy(voice_info.data(),
+                    buf.data() + sizeof(UpdateDataHeader) + config.behavior_size +
+                        config.memory_pools_size + config.voice_resource_size,
+                    worker_params.voice_count * sizeof(VoiceInfo));
+
+        UpdateDataHeader response_data{worker_params};
+
+        ASSERT(ctx.GetWriteBufferSize() == response_data.total_size);
+
+        std::vector<u8> output(response_data.total_size);
+        std::memcpy(output.data(), &response_data, sizeof(UpdateDataHeader));
+        std::vector<MemoryPoolEntry> memory_pool(memory_pool_count);
+        for (unsigned i = 0; i < memory_pool.size(); i++) {
+            if (mem_pool_info[i].pool_state == MemoryPoolStates::RequestAttach)
+                memory_pool[i].state = MemoryPoolStates::Attached;
+            else if (mem_pool_info[i].pool_state == MemoryPoolStates::RequestDetach)
+                memory_pool[i].state = MemoryPoolStates::Detached;
+            else
+                memory_pool[i].state = mem_pool_info[i].pool_state;
         }
+        std::memcpy(output.data() + sizeof(UpdateDataHeader), memory_pool.data(),
+                    response_data.memory_pools_size);
 
-        ctx.WriteBuffer(&response_data, response_data.total_size);
+        for (unsigned i = 0; i < voice_info.size(); i++) {
+            if (voice_info[i].is_new) {
+                voice_status_list[i].played_sample_count = 0;
+                voice_status_list[i].wave_buffer_consumed = 0;
+            } else if (voice_info[i].play_state == (u8)PlayStates::Started) {
+                for (u32 buff_idx = 0; buff_idx < voice_info[i].wave_buffer_count; buff_idx++) {
+                    voice_status_list[i].played_sample_count +=
+                        (voice_info[i].wave_buffer[buff_idx].end_sample_offset -
+                         voice_info[i].wave_buffer[buff_idx].start_sample_offset) /
+                        2;
+                    voice_status_list[i].wave_buffer_consumed++;
+                }
+            }
+        }
+        std::memcpy(output.data() + sizeof(UpdateDataHeader) + response_data.memory_pools_size,
+                    voice_status_list.data(), response_data.voices_size);
+
+        ctx.WriteBuffer(output);
 
         IPC::ResponseBuilder rb{ctx, 2};
-
         rb.Push(RESULT_SUCCESS);
 
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
     }
 
     void StartAudioRenderer(Kernel::HLERequestContext& ctx) {
@@ -87,7 +123,7 @@ private:
 
         rb.Push(RESULT_SUCCESS);
 
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
     }
 
     void StopAudioRenderer(Kernel::HLERequestContext& ctx) {
@@ -95,7 +131,7 @@ private:
 
         rb.Push(RESULT_SUCCESS);
 
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
     }
 
     void QuerySystemEvent(Kernel::HLERequestContext& ctx) {
@@ -105,51 +141,132 @@ private:
         rb.Push(RESULT_SUCCESS);
         rb.PushCopyObjects(system_event);
 
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
     }
 
-    struct AudioRendererStateEntry {
-        u32_le state;
+    enum class MemoryPoolStates : u32 { // Should be LE
+        Invalid = 0x0,
+        Unknown = 0x1,
+        RequestDetach = 0x2,
+        Detached = 0x3,
+        RequestAttach = 0x4,
+        Attached = 0x5,
+        Released = 0x6,
+    };
+
+    enum class PlayStates : u8 {
+        Started = 0,
+        Stopped = 1,
+    };
+
+    struct MemoryPoolEntry {
+        MemoryPoolStates state;
         u32_le unknown_4;
         u32_le unknown_8;
         u32_le unknown_c;
     };
-    static_assert(sizeof(AudioRendererStateEntry) == 0x10,
-                  "AudioRendererStateEntry has wrong size");
+    static_assert(sizeof(MemoryPoolEntry) == 0x10, "MemoryPoolEntry has wrong size");
 
-    struct AudioRendererResponseData {
-        u32_le unknown_0;
-        u32_le section_5_size;
-        u32_le section_0_size;
-        u32_le section_1_size;
-        u32_le unknown_10;
-        u32_le section_2_size;
-        u32_le unknown_18;
-        u32_le section_3_size;
-        u32_le section_4_size;
-        u32_le unknown_24;
-        u32_le unknown_28;
-        u32_le unknown_2c;
-        u32_le unknown_30;
-        u32_le unknown_34;
-        u32_le unknown_38;
-        u32_le total_size;
-
-        std::array<AudioRendererStateEntry, 0x18e> state_entries;
-
-        std::array<u8, 0x600> section_1;
-        std::array<u8, 0xe0> section_2;
-        std::array<u8, 0x20> section_3;
-        std::array<u8, 0x10> section_4;
-        std::array<u8, 0xb0> section_5;
+    struct MemoryPoolInfo {
+        u64_le pool_address;
+        u64_le pool_size;
+        MemoryPoolStates pool_state;
+        INSERT_PADDING_WORDS(3); // Unknown
     };
-    static_assert(sizeof(AudioRendererResponseData) == 0x20e0,
-                  "AudioRendererResponseData has wrong size");
+    static_assert(sizeof(MemoryPoolInfo) == 0x20, "MemoryPoolInfo has wrong size");
+
+    struct UpdateDataHeader {
+        UpdateDataHeader() {}
+
+        UpdateDataHeader(const AudioRendererParameter& config) {
+            revision = Common::MakeMagic('R', 'E', 'V', '4'); // 5.1.0 Revision
+            behavior_size = 0xb0;
+            memory_pools_size = (config.effect_count + (config.voice_count * 4)) * 0x10;
+            voices_size = config.voice_count * 0x10;
+            effects_size = config.effect_count * 0x10;
+            sinks_size = config.sink_count * 0x20;
+            performance_manager_size = 0x10;
+            total_size = sizeof(UpdateDataHeader) + behavior_size + memory_pools_size +
+                         voices_size + effects_size + sinks_size + performance_manager_size;
+        }
+
+        u32_le revision;
+        u32_le behavior_size;
+        u32_le memory_pools_size;
+        u32_le voices_size;
+        u32_le voice_resource_size;
+        u32_le effects_size;
+        u32_le mixes_size;
+        u32_le sinks_size;
+        u32_le performance_manager_size;
+        INSERT_PADDING_WORDS(6);
+        u32_le total_size;
+    };
+    static_assert(sizeof(UpdateDataHeader) == 0x40, "UpdateDataHeader has wrong size");
+
+    struct BiquadFilter {
+        u8 enable;
+        INSERT_PADDING_BYTES(1);
+        s16_le numerator[3];
+        s16_le denominator[2];
+    };
+    static_assert(sizeof(BiquadFilter) == 0xc, "BiquadFilter has wrong size");
+
+    struct WaveBuffer {
+        u64_le buffer_addr;
+        u64_le buffer_sz;
+        s32_le start_sample_offset;
+        s32_le end_sample_offset;
+        u8 loop;
+        u8 end_of_stream;
+        u8 sent_to_server;
+        INSERT_PADDING_BYTES(5);
+        u64 context_addr;
+        u64 context_sz;
+        INSERT_PADDING_BYTES(8);
+    };
+    static_assert(sizeof(WaveBuffer) == 0x38, "WaveBuffer has wrong size");
+
+    struct VoiceInfo {
+        u32_le id;
+        u32_le node_id;
+        u8 is_new;
+        u8 is_in_use;
+        u8 play_state;
+        u8 sample_format;
+        u32_le sample_rate;
+        u32_le priority;
+        u32_le sorting_order;
+        u32_le channel_count;
+        float_le pitch;
+        float_le volume;
+        BiquadFilter biquad_filter[2];
+        u32_le wave_buffer_count;
+        u16_le wave_buffer_head;
+        INSERT_PADDING_BYTES(6);
+        u64_le additional_params_addr;
+        u64_le additional_params_sz;
+        u32_le mix_id;
+        u32_le splitter_info_id;
+        WaveBuffer wave_buffer[4];
+        u32_le voice_channel_resource_ids[6];
+        INSERT_PADDING_BYTES(24);
+    };
+    static_assert(sizeof(VoiceInfo) == 0x170, "VoiceInfo is wrong size");
+
+    struct VoiceOutStatus {
+        u64_le played_sample_count;
+        u32_le wave_buffer_consumed;
+        INSERT_PADDING_WORDS(1);
+    };
+    static_assert(sizeof(VoiceOutStatus) == 0x10, "VoiceOutStatus has wrong size");
 
     /// This is used to trigger the audio event callback.
     CoreTiming::EventType* audio_event;
 
     Kernel::SharedPtr<Kernel::Event> system_event;
+    AudioRendererParameter worker_params;
+    std::vector<VoiceOutStatus> voice_status_list;
 };
 
 class IAudioDevice final : public ServiceFramework<IAudioDevice> {
@@ -178,7 +295,7 @@ public:
 
 private:
     void ListAudioDeviceName(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
         IPC::RequestParser rp{ctx};
 
         const std::string audio_interface = "AudioInterface";
@@ -190,7 +307,7 @@ private:
     }
 
     void SetAudioDeviceOutputVolume(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
 
         IPC::RequestParser rp{ctx};
         f32 volume = static_cast<f32>(rp.Pop<u32>());
@@ -203,7 +320,7 @@ private:
     }
 
     void GetActiveAudioDeviceName(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
         IPC::RequestParser rp{ctx};
 
         const std::string audio_interface = "AudioDevice";
@@ -215,7 +332,7 @@ private:
     }
 
     void QueryAudioDeviceSystemEvent(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
 
         buffer_event->Signal();
 
@@ -225,7 +342,7 @@ private:
     }
 
     void GetActiveChannelCount(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
         rb.Push<u32>(1);
@@ -247,21 +364,73 @@ AudRenU::AudRenU() : ServiceFramework("audren:u") {
 }
 
 void AudRenU::OpenAudioRenderer(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    auto params = rp.PopRaw<AudioRendererParameter>();
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
 
     rb.Push(RESULT_SUCCESS);
-    rb.PushIpcInterface<Audio::IAudioRenderer>();
+    rb.PushIpcInterface<Audio::IAudioRenderer>(std::move(params));
 
-    NGLOG_DEBUG(Service_Audio, "called");
+    LOG_DEBUG(Service_Audio, "called");
 }
 
 void AudRenU::GetAudioRendererWorkBufferSize(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    auto params = rp.PopRaw<AudioRendererParameter>();
+
+    u64 buffer_sz = Common::AlignUp(4 * params.unknown_8, 0x40);
+    buffer_sz += params.unknown_c * 1024;
+    buffer_sz += 0x940 * (params.unknown_c + 1);
+    buffer_sz += 0x3F0 * params.voice_count;
+    buffer_sz += Common::AlignUp(8 * (params.unknown_c + 1), 0x10);
+    buffer_sz += Common::AlignUp(8 * params.voice_count, 0x10);
+    buffer_sz +=
+        Common::AlignUp((0x3C0 * (params.sink_count + params.unknown_c) + 4 * params.sample_count) *
+                            (params.unknown_8 + 6),
+                        0x40);
+
+    if (IsFeatureSupported(AudioFeatures::Splitter, params.revision)) {
+        u32 count = params.unknown_c + 1;
+        u64 node_count = Common::AlignUp(count, 0x40);
+        u64 node_state_buffer_sz =
+            4 * (node_count * node_count) + 0xC * node_count + 2 * (node_count / 8);
+        u64 edge_matrix_buffer_sz = 0;
+        node_count = Common::AlignUp(count * count, 0x40);
+        if (node_count >> 31 != 0) {
+            edge_matrix_buffer_sz = (node_count | 7) / 8;
+        } else {
+            edge_matrix_buffer_sz = node_count / 8;
+        }
+        buffer_sz += Common::AlignUp(node_state_buffer_sz + edge_matrix_buffer_sz, 0x10);
+    }
+
+    buffer_sz += 0x20 * (params.effect_count + 4 * params.voice_count) + 0x50;
+    if (IsFeatureSupported(AudioFeatures::Splitter, params.revision)) {
+        buffer_sz += 0xE0 * params.unknown_2c;
+        buffer_sz += 0x20 * params.splitter_count;
+        buffer_sz += Common::AlignUp(4 * params.unknown_2c, 0x10);
+    }
+    buffer_sz = Common::AlignUp(buffer_sz, 0x40) + 0x170 * params.sink_count;
+    u64 output_sz = buffer_sz + 0x280 * params.sink_count + 0x4B0 * params.effect_count +
+                    ((params.voice_count * 256) | 0x40);
+
+    if (params.unknown_1c >= 1) {
+        output_sz = Common::AlignUp(((16 * params.sink_count + 16 * params.effect_count +
+                                      16 * params.voice_count + 16) +
+                                     0x658) *
+                                            (params.unknown_1c + 1) +
+                                        0xc0,
+                                    0x40) +
+                    output_sz;
+    }
+    output_sz = Common::AlignUp(output_sz + 0x1807e, 0x1000);
+
     IPC::ResponseBuilder rb{ctx, 4};
 
     rb.Push(RESULT_SUCCESS);
-    rb.Push<u64>(0x4000);
+    rb.Push<u64>(output_sz);
 
-    NGLOG_WARNING(Service_Audio, "(STUBBED) called");
+    LOG_DEBUG(Service_Audio, "called, buffer_size=0x{:X}", output_sz);
 }
 
 void AudRenU::GetAudioDevice(Kernel::HLERequestContext& ctx) {
@@ -270,7 +439,17 @@ void AudRenU::GetAudioDevice(Kernel::HLERequestContext& ctx) {
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<Audio::IAudioDevice>();
 
-    NGLOG_DEBUG(Service_Audio, "called");
+    LOG_DEBUG(Service_Audio, "called");
+}
+
+bool AudRenU::IsFeatureSupported(AudioFeatures feature, u32_le revision) const {
+    u32_be version_num = (revision - Common::MakeMagic('R', 'E', 'V', '0')); // Byte swap
+    switch (feature) {
+    case AudioFeatures::Splitter:
+        return version_num >= 2u;
+    default:
+        return false;
+    }
 }
 
 } // namespace Service::Audio

src/core/hle/service/audio/audren_u.h

@@ -12,6 +12,24 @@ class HLERequestContext;
 
 namespace Service::Audio {
 
+struct AudioRendererParameter {
+    u32_le sample_rate;
+    u32_le sample_count;
+    u32_le unknown_8;
+    u32_le unknown_c;
+    u32_le voice_count;
+    u32_le sink_count;
+    u32_le effect_count;
+    u32_le unknown_1c;
+    u8 unknown_20;
+    INSERT_PADDING_BYTES(3);
+    u32_le splitter_count;
+    u32_le unknown_2c;
+    INSERT_PADDING_WORDS(1);
+    u32_le revision;
+};
+static_assert(sizeof(AudioRendererParameter) == 52, "AudioRendererParameter is an invalid size");
+
 class AudRenU final : public ServiceFramework<AudRenU> {
 public:
     explicit AudRenU();
@@ -21,6 +39,12 @@ private:
     void OpenAudioRenderer(Kernel::HLERequestContext& ctx);
     void GetAudioRendererWorkBufferSize(Kernel::HLERequestContext& ctx);
     void GetAudioDevice(Kernel::HLERequestContext& ctx);
+
+    enum class AudioFeatures : u32 {
+        Splitter,
+    };
+
+    bool IsFeatureSupported(AudioFeatures feature, u32_le revision) const;
 };
 
 } // namespace Service::Audio

src/core/hle/service/audio/hwopus.cpp

@@ -0,0 +1,29 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/service/audio/hwopus.h"
+
+namespace Service::Audio {
+
+void HwOpus::GetWorkBufferSize(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service_Audio, "(STUBBED) called");
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u32>(0x4000);
+}
+
+HwOpus::HwOpus() : ServiceFramework("hwopus") {
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "Initialize"},
+        {1, &HwOpus::GetWorkBufferSize, "GetWorkBufferSize"},
+        {2, nullptr, "InitializeMultiStream"},
+        {3, nullptr, "GetWorkBufferSizeMultiStream"},
+    };
+    RegisterHandlers(functions);
+}
+
+} // namespace Service::Audio

src/core/hle/service/audio/hwopus.h

@@ -0,0 +1,20 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::Audio {
+
+class HwOpus final : public ServiceFramework<HwOpus> {
+public:
+    explicit HwOpus();
+    ~HwOpus() = default;
+
+private:
+    void GetWorkBufferSize(Kernel::HLERequestContext& ctx);
+};
+
+} // namespace Service::Audio

src/core/hle/service/bcat/bcat.cpp

@@ -0,0 +1,16 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/bcat/bcat.h"
+
+namespace Service::BCAT {
+
+BCAT::BCAT(std::shared_ptr<Module> module, const char* name)
+    : Module::Interface(std::move(module), name) {
+    static const FunctionInfo functions[] = {
+        {0, &BCAT::CreateBcatService, "CreateBcatService"},
+    };
+    RegisterHandlers(functions);
+}
+} // namespace Service::BCAT

src/core/hle/service/bcat/bcat.h

@@ -0,0 +1,16 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/bcat/module.h"
+
+namespace Service::BCAT {
+
+class BCAT final : public Module::Interface {
+public:
+    explicit BCAT(std::shared_ptr<Module> module, const char* name);
+};
+
+} // namespace Service::BCAT

src/core/hle/service/bcat/module.cpp

@@ -0,0 +1,53 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/service/bcat/bcat.h"
+#include "core/hle/service/bcat/module.h"
+
+namespace Service::BCAT {
+
+class IBcatService final : public ServiceFramework<IBcatService> {
+public:
+    IBcatService() : ServiceFramework("IBcatService") {
+        static const FunctionInfo functions[] = {
+            {10100, nullptr, "RequestSyncDeliveryCache"},
+            {10101, nullptr, "RequestSyncDeliveryCacheWithDirectoryName"},
+            {10200, nullptr, "CancelSyncDeliveryCacheRequest"},
+            {20100, nullptr, "RequestSyncDeliveryCacheWithApplicationId"},
+            {20101, nullptr, "RequestSyncDeliveryCacheWithApplicationIdAndDirectoryName"},
+            {30100, nullptr, "SetPassphrase"},
+            {30200, nullptr, "RegisterBackgroundDeliveryTask"},
+            {30201, nullptr, "UnregisterBackgroundDeliveryTask"},
+            {30202, nullptr, "BlockDeliveryTask"},
+            {30203, nullptr, "UnblockDeliveryTask"},
+            {90100, nullptr, "EnumerateBackgroundDeliveryTask"},
+            {90200, nullptr, "GetDeliveryList"},
+            {90201, nullptr, "ClearDeliveryCacheStorage"},
+            {90300, nullptr, "GetPushNotificationLog"},
+        };
+        RegisterHandlers(functions);
+    }
+};
+
+void Module::Interface::CreateBcatService(Kernel::HLERequestContext& ctx) {
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IBcatService>();
+    LOG_DEBUG(Service_BCAT, "called");
+}
+
+Module::Interface::Interface(std::shared_ptr<Module> module, const char* name)
+    : ServiceFramework(name), module(std::move(module)) {}
+
+void InstallInterfaces(SM::ServiceManager& service_manager) {
+    auto module = std::make_shared<Module>();
+    std::make_shared<BCAT>(module, "bcat:a")->InstallAsService(service_manager);
+    std::make_shared<BCAT>(module, "bcat:m")->InstallAsService(service_manager);
+    std::make_shared<BCAT>(module, "bcat:u")->InstallAsService(service_manager);
+    std::make_shared<BCAT>(module, "bcat:s")->InstallAsService(service_manager);
+}
+
+} // namespace Service::BCAT

src/core/hle/service/bcat/module.h

@@ -0,0 +1,27 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::BCAT {
+
+class Module final {
+public:
+    class Interface : public ServiceFramework<Interface> {
+    public:
+        Interface(std::shared_ptr<Module> module, const char* name);
+
+        void CreateBcatService(Kernel::HLERequestContext& ctx);
+
+    protected:
+        std::shared_ptr<Module> module;
+    };
+};
+
+/// Registers all BCAT services with the specified service manager.
+void InstallInterfaces(SM::ServiceManager& service_manager);
+
+} // namespace Service::BCAT

src/core/hle/service/fatal/fatal.cpp

@@ -16,13 +16,13 @@ Module::Interface::Interface(std::shared_ptr<Module> module, const char* name)
 void Module::Interface::ThrowFatalWithPolicy(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx);
     u32 error_code = rp.Pop<u32>();
-    NGLOG_WARNING(Service_Fatal, "(STUBBED) called, error_code=0x{:X}", error_code);
+    LOG_WARNING(Service_Fatal, "(STUBBED) called, error_code=0x{:X}", error_code);
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 }
 
 void Module::Interface::ThrowFatalWithCpuContext(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_Fatal, "(STUBBED) called");
+    LOG_WARNING(Service_Fatal, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 }

src/core/hle/service/filesystem/filesystem.cpp

@@ -2,37 +2,222 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <boost/container/flat_map.hpp>
+#include "boost/container/flat_map.hpp"
+#include "common/assert.h"
+#include "common/common_paths.h"
 #include "common/file_util.h"
+#include "core/core.h"
+#include "core/file_sys/errors.h"
 #include "core/file_sys/filesystem.h"
-#include "core/file_sys/savedata_factory.h"
-#include "core/file_sys/sdmc_factory.h"
+#include "core/file_sys/vfs.h"
+#include "core/file_sys/vfs_offset.h"
+#include "core/file_sys/vfs_real.h"
+#include "core/hle/kernel/process.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/hle/service/filesystem/fsp_srv.h"
 
 namespace Service::FileSystem {
 
+// Size of emulated sd card free space, reported in bytes.
+// Just using 32GB because thats reasonable
+// TODO(DarkLordZach): Eventually make this configurable in settings.
+constexpr u64 EMULATED_SD_REPORTED_SIZE = 32000000000;
+
+static FileSys::VirtualDir GetDirectoryRelativeWrapped(FileSys::VirtualDir base,
+                                                       const std::string& dir_name) {
+    if (dir_name == "." || dir_name == "" || dir_name == "/" || dir_name == "\\")
+        return base;
+
+    return base->GetDirectoryRelative(dir_name);
+}
+
+VfsDirectoryServiceWrapper::VfsDirectoryServiceWrapper(FileSys::VirtualDir backing_)
+    : backing(backing_) {}
+
+std::string VfsDirectoryServiceWrapper::GetName() const {
+    return backing->GetName();
+}
+
+ResultCode VfsDirectoryServiceWrapper::CreateFile(const std::string& path, u64 size) const {
+    auto dir = GetDirectoryRelativeWrapped(backing, FileUtil::GetParentPath(path));
+    auto file = dir->CreateFile(FileUtil::GetFilename(path));
+    if (file == nullptr)
+        return ResultCode(-1);
+    if (!file->Resize(size))
+        return ResultCode(-1);
+    return RESULT_SUCCESS;
+}
+
+ResultCode VfsDirectoryServiceWrapper::DeleteFile(const std::string& path) const {
+    auto dir = GetDirectoryRelativeWrapped(backing, FileUtil::GetParentPath(path));
+    if (!backing->DeleteFile(FileUtil::GetFilename(path)))
+        return ResultCode(-1);
+    return RESULT_SUCCESS;
+}
+
+ResultCode VfsDirectoryServiceWrapper::CreateDirectory(const std::string& path) const {
+    auto dir = GetDirectoryRelativeWrapped(backing, FileUtil::GetParentPath(path));
+    if (dir == nullptr && FileUtil::GetFilename(FileUtil::GetParentPath(path)).empty())
+        dir = backing;
+    auto new_dir = dir->CreateSubdirectory(FileUtil::GetFilename(path));
+    if (new_dir == nullptr)
+        return ResultCode(-1);
+    return RESULT_SUCCESS;
+}
+
+ResultCode VfsDirectoryServiceWrapper::DeleteDirectory(const std::string& path) const {
+    auto dir = GetDirectoryRelativeWrapped(backing, FileUtil::GetParentPath(path));
+    if (!dir->DeleteSubdirectory(FileUtil::GetFilename(path)))
+        return ResultCode(-1);
+    return RESULT_SUCCESS;
+}
+
+ResultCode VfsDirectoryServiceWrapper::DeleteDirectoryRecursively(const std::string& path) const {
+    auto dir = GetDirectoryRelativeWrapped(backing, FileUtil::GetParentPath(path));
+    if (!dir->DeleteSubdirectoryRecursive(FileUtil::GetFilename(path)))
+        return ResultCode(-1);
+    return RESULT_SUCCESS;
+}
+
+ResultCode VfsDirectoryServiceWrapper::RenameFile(const std::string& src_path,
+                                                  const std::string& dest_path) const {
+    auto src = backing->GetFileRelative(src_path);
+    if (FileUtil::GetParentPath(src_path) == FileUtil::GetParentPath(dest_path)) {
+        // Use more-optimized vfs implementation rename.
+        if (src == nullptr)
+            return FileSys::ERROR_PATH_NOT_FOUND;
+        if (!src->Rename(FileUtil::GetFilename(dest_path)))
+            return ResultCode(-1);
+        return RESULT_SUCCESS;
+    }
+
+    // Move by hand -- TODO(DarkLordZach): Optimize
+    auto c_res = CreateFile(dest_path, src->GetSize());
+    if (c_res != RESULT_SUCCESS)
+        return c_res;
+
+    auto dest = backing->GetFileRelative(dest_path);
+    ASSERT_MSG(dest != nullptr, "Newly created file with success cannot be found.");
+
+    ASSERT_MSG(dest->WriteBytes(src->ReadAllBytes()) == src->GetSize(),
+               "Could not write all of the bytes but everything else has succeded.");
+
+    if (!src->GetContainingDirectory()->DeleteFile(FileUtil::GetFilename(src_path)))
+        return ResultCode(-1);
+
+    return RESULT_SUCCESS;
+}
+
+ResultCode VfsDirectoryServiceWrapper::RenameDirectory(const std::string& src_path,
+                                                       const std::string& dest_path) const {
+    auto src = GetDirectoryRelativeWrapped(backing, src_path);
+    if (FileUtil::GetParentPath(src_path) == FileUtil::GetParentPath(dest_path)) {
+        // Use more-optimized vfs implementation rename.
+        if (src == nullptr)
+            return FileSys::ERROR_PATH_NOT_FOUND;
+        if (!src->Rename(FileUtil::GetFilename(dest_path)))
+            return ResultCode(-1);
+        return RESULT_SUCCESS;
+    }
+
+    // TODO(DarkLordZach): Implement renaming across the tree (move).
+    ASSERT_MSG(false,
+               "Could not rename directory with path \"{}\" to new path \"{}\" because parent dirs "
+               "don't match -- UNIMPLEMENTED",
+               src_path, dest_path);
+
+    return ResultCode(-1);
+}
+
+ResultVal<FileSys::VirtualFile> VfsDirectoryServiceWrapper::OpenFile(const std::string& path,
+                                                                     FileSys::Mode mode) const {
+    auto file = backing->GetFileRelative(path);
+    if (file == nullptr)
+        return FileSys::ERROR_PATH_NOT_FOUND;
+
+    if ((static_cast<u32>(mode) & static_cast<u32>(FileSys::Mode::Append)) != 0) {
+        return MakeResult<FileSys::VirtualFile>(
+            std::make_shared<FileSys::OffsetVfsFile>(file, 0, file->GetSize()));
+    }
+
+    return MakeResult<FileSys::VirtualFile>(file);
+}
+
+ResultVal<FileSys::VirtualDir> VfsDirectoryServiceWrapper::OpenDirectory(const std::string& path) {
+    auto dir = GetDirectoryRelativeWrapped(backing, path);
+    if (dir == nullptr)
+        return ResultCode(-1);
+    return MakeResult(dir);
+}
+
+u64 VfsDirectoryServiceWrapper::GetFreeSpaceSize() const {
+    if (backing->IsWritable())
+        return EMULATED_SD_REPORTED_SIZE;
+
+    return 0;
+}
+
+ResultVal<FileSys::EntryType> VfsDirectoryServiceWrapper::GetEntryType(
+    const std::string& path) const {
+    auto dir = GetDirectoryRelativeWrapped(backing, FileUtil::GetParentPath(path));
+    if (dir == nullptr)
+        return ResultCode(-1);
+    auto filename = FileUtil::GetFilename(path);
+    if (dir->GetFile(filename) != nullptr)
+        return MakeResult(FileSys::EntryType::File);
+    if (dir->GetSubdirectory(filename) != nullptr)
+        return MakeResult(FileSys::EntryType::Directory);
+    return ResultCode(-1);
+}
+
+// A deferred filesystem for nand save data.
+// This must be deferred because the directory is dependent on title id, which is not set at
+// registration time.
+struct SaveDataDeferredFilesystem : DeferredFilesystem {
+protected:
+    FileSys::VirtualDir CreateFilesystem() override {
+        u64 title_id = Core::CurrentProcess()->program_id;
+        // TODO(DarkLordZach): Users
+        u32 user_id = 0;
+        std::string nand_directory = fmt::format(
+            "{}save/{:016X}/{:08X}/", FileUtil::GetUserPath(D_NAND_IDX), title_id, user_id);
+
+        auto savedata =
+            std::make_shared<FileSys::RealVfsDirectory>(nand_directory, FileSys::Mode::Write);
+        return savedata;
+    }
+};
+
 /**
  * Map of registered file systems, identified by type. Once an file system is registered here, it
  * is never removed until UnregisterFileSystems is called.
  */
-static boost::container::flat_map<Type, std::unique_ptr<FileSys::FileSystemFactory>> filesystem_map;
+static boost::container::flat_map<Type, std::unique_ptr<DeferredFilesystem>> filesystem_map;
+static FileSys::VirtualFile filesystem_romfs = nullptr;
 
-ResultCode RegisterFileSystem(std::unique_ptr<FileSys::FileSystemFactory>&& factory, Type type) {
+ResultCode RegisterFileSystem(std::unique_ptr<DeferredFilesystem>&& factory, Type type) {
     auto result = filesystem_map.emplace(type, std::move(factory));
 
     bool inserted = result.second;
     ASSERT_MSG(inserted, "Tried to register more than one system with same id code");
 
     auto& filesystem = result.first->second;
-    NGLOG_DEBUG(Service_FS, "Registered file system {} with id code 0x{:08X}",
-                filesystem->GetName(), static_cast<u32>(type));
+    LOG_DEBUG(Service_FS, "Registered file system with id code 0x{:08X}", static_cast<u32>(type));
     return RESULT_SUCCESS;
 }
 
-ResultVal<std::unique_ptr<FileSys::FileSystemBackend>> OpenFileSystem(Type type,
-                                                                      FileSys::Path& path) {
-    NGLOG_TRACE(Service_FS, "Opening FileSystem with type={}", static_cast<u32>(type));
+ResultCode RegisterRomFS(FileSys::VirtualFile filesystem) {
+    ASSERT_MSG(filesystem_romfs == nullptr,
+               "Tried to register more than one system with same id code");
+
+    filesystem_romfs = filesystem;
+    LOG_DEBUG(Service_FS, "Registered file system {} with id code 0x{:08X}", filesystem->GetName(),
+              static_cast<u32>(Type::RomFS));
+    return RESULT_SUCCESS;
+}
+
+ResultVal<FileSys::VirtualDir> OpenFileSystem(Type type) {
+    LOG_TRACE(Service_FS, "Opening FileSystem with type={}", static_cast<u32>(type));
 
     auto itr = filesystem_map.find(type);
     if (itr == filesystem_map.end()) {
@@ -40,11 +225,17 @@ ResultVal<std::unique_ptr<FileSys::FileSystemBackend>> OpenFileSystem(Type type,
         return ResultCode(-1);
     }
 
-    return itr->second->Open(path);
+    return MakeResult(itr->second->Get());
+}
+
+ResultVal<FileSys::VirtualFile> OpenRomFS() {
+    if (filesystem_romfs == nullptr)
+        return ResultCode(-1);
+    return MakeResult(filesystem_romfs);
 }
 
 ResultCode FormatFileSystem(Type type) {
-    NGLOG_TRACE(Service_FS, "Formatting FileSystem with type={}", static_cast<u32>(type));
+    LOG_TRACE(Service_FS, "Formatting FileSystem with type={}", static_cast<u32>(type));
 
     auto itr = filesystem_map.find(type);
     if (itr == filesystem_map.end()) {
@@ -52,21 +243,21 @@ ResultCode FormatFileSystem(Type type) {
         return ResultCode(-1);
     }
 
-    FileSys::Path unused;
-    return itr->second->Format(unused);
+    return itr->second->Get()->GetParentDirectory()->DeleteSubdirectory(
+               itr->second->Get()->GetName())
+               ? RESULT_SUCCESS
+               : ResultCode(-1);
 }
 
 void RegisterFileSystems() {
     filesystem_map.clear();
+    filesystem_romfs = nullptr;
 
-    std::string nand_directory = FileUtil::GetUserPath(D_NAND_IDX);
     std::string sd_directory = FileUtil::GetUserPath(D_SDMC_IDX);
+    auto sdcard = std::make_shared<FileSys::RealVfsDirectory>(sd_directory, FileSys::Mode::Write);
+    RegisterFileSystem(std::make_unique<DeferredFilesystem>(sdcard), Type::SDMC);
 
-    auto savedata = std::make_unique<FileSys::SaveData_Factory>(std::move(nand_directory));
-    RegisterFileSystem(std::move(savedata), Type::SaveData);
-
-    auto sdcard = std::make_unique<FileSys::SDMC_Factory>(std::move(sd_directory));
-    RegisterFileSystem(std::move(sdcard), Type::SDMC);
+    RegisterFileSystem(std::make_unique<SaveDataDeferredFilesystem>(), Type::SaveData);
 }
 
 void InstallInterfaces(SM::ServiceManager& service_manager) {

src/core/hle/service/filesystem/filesystem.h

@@ -6,6 +6,8 @@
 
 #include <memory>
 #include "common/common_types.h"
+#include "core/file_sys/filesystem.h"
+#include "core/file_sys/vfs.h"
 #include "core/hle/result.h"
 
 namespace FileSys {
@@ -29,12 +31,136 @@ enum class Type {
     SDMC = 3,
 };
 
+// A class that wraps a VfsDirectory with methods that return ResultVal and ResultCode instead of
+// pointers and booleans. This makes using a VfsDirectory with switch services much easier and
+// avoids repetitive code.
+class VfsDirectoryServiceWrapper {
+public:
+    explicit VfsDirectoryServiceWrapper(FileSys::VirtualDir backing);
+
+    /**
+     * Get a descriptive name for the archive (e.g. "RomFS", "SaveData", etc.)
+     */
+    std::string GetName() const;
+
+    /**
+     * Create a file specified by its path
+     * @param path Path relative to the Archive
+     * @param size The size of the new file, filled with zeroes
+     * @return Result of the operation
+     */
+    ResultCode CreateFile(const std::string& path, u64 size) const;
+
+    /**
+     * Delete a file specified by its path
+     * @param path Path relative to the archive
+     * @return Result of the operation
+     */
+    ResultCode DeleteFile(const std::string& path) const;
+
+    /**
+     * Create a directory specified by its path
+     * @param path Path relative to the archive
+     * @return Result of the operation
+     */
+    ResultCode CreateDirectory(const std::string& path) const;
+
+    /**
+     * Delete a directory specified by its path
+     * @param path Path relative to the archive
+     * @return Result of the operation
+     */
+    ResultCode DeleteDirectory(const std::string& path) const;
+
+    /**
+     * Delete a directory specified by its path and anything under it
+     * @param path Path relative to the archive
+     * @return Result of the operation
+     */
+    ResultCode DeleteDirectoryRecursively(const std::string& path) const;
+
+    /**
+     * Rename a File specified by its path
+     * @param src_path Source path relative to the archive
+     * @param dest_path Destination path relative to the archive
+     * @return Result of the operation
+     */
+    ResultCode RenameFile(const std::string& src_path, const std::string& dest_path) const;
+
+    /**
+     * Rename a Directory specified by its path
+     * @param src_path Source path relative to the archive
+     * @param dest_path Destination path relative to the archive
+     * @return Result of the operation
+     */
+    ResultCode RenameDirectory(const std::string& src_path, const std::string& dest_path) const;
+
+    /**
+     * Open a file specified by its path, using the specified mode
+     * @param path Path relative to the archive
+     * @param mode Mode to open the file with
+     * @return Opened file, or error code
+     */
+    ResultVal<FileSys::VirtualFile> OpenFile(const std::string& path, FileSys::Mode mode) const;
+
+    /**
+     * Open a directory specified by its path
+     * @param path Path relative to the archive
+     * @return Opened directory, or error code
+     */
+    ResultVal<FileSys::VirtualDir> OpenDirectory(const std::string& path);
+
+    /**
+     * Get the free space
+     * @return The number of free bytes in the archive
+     */
+    u64 GetFreeSpaceSize() const;
+
+    /**
+     * Get the type of the specified path
+     * @return The type of the specified path or error code
+     */
+    ResultVal<FileSys::EntryType> GetEntryType(const std::string& path) const;
+
+private:
+    FileSys::VirtualDir backing;
+};
+
+// A class that deferres the creation of a filesystem until a later time.
+// This is useful if construction depends on a variable not known when the filesystem is registered.
+// Construct this with a filesystem (VirtualDir) to avoid the deferrence feature or override the
+//     CreateFilesystem method which will be called on first use.
+struct DeferredFilesystem {
+    DeferredFilesystem() = default;
+
+    explicit DeferredFilesystem(FileSys::VirtualDir vfs_directory) : fs(std::move(vfs_directory)) {}
+
+    FileSys::VirtualDir Get() {
+        if (fs == nullptr)
+            fs = CreateFilesystem();
+
+        return fs;
+    }
+
+    virtual ~DeferredFilesystem() = default;
+
+protected:
+    virtual FileSys::VirtualDir CreateFilesystem() {
+        return fs;
+    }
+
+private:
+    FileSys::VirtualDir fs;
+};
+
 /**
  * Registers a FileSystem, instances of which can later be opened using its IdCode.
  * @param factory FileSystem backend interface to use
  * @param type Type used to access this type of FileSystem
  */
-ResultCode RegisterFileSystem(std::unique_ptr<FileSys::FileSystemFactory>&& factory, Type type);
+ResultCode RegisterFileSystem(std::unique_ptr<DeferredFilesystem>&& fs, Type type);
+
+ResultCode RegisterRomFS(FileSys::VirtualFile fs);
 
 /**
  * Opens a file system
@@ -42,8 +168,9 @@ ResultCode RegisterFileSystem(std::unique_ptr<FileSys::FileSystemFactory>&& fact
  * @param path Path to the file system, used with Binary paths
  * @return FileSys::FileSystemBackend interface to the file system
  */
-ResultVal<std::unique_ptr<FileSys::FileSystemBackend>> OpenFileSystem(Type type,
-                                                                      FileSys::Path& path);
+ResultVal<FileSys::VirtualDir> OpenFileSystem(Type type);
+
+ResultVal<FileSys::VirtualFile> OpenRomFS();
 
 /**
  * Formats a file system

src/core/hle/service/filesystem/fsp_srv.cpp

@@ -4,6 +4,7 @@
 
 #include <cinttypes>
 #include "common/logging/log.h"
+#include "common/string_util.h"
 #include "core/core.h"
 #include "core/file_sys/directory.h"
 #include "core/file_sys/filesystem.h"
@@ -18,8 +19,8 @@ namespace Service::FileSystem {
 
 class IStorage final : public ServiceFramework<IStorage> {
 public:
-    IStorage(std::unique_ptr<FileSys::StorageBackend>&& backend)
-        : ServiceFramework("IStorage"), backend(std::move(backend)) {
+    IStorage(FileSys::VirtualFile backend_)
+        : ServiceFramework("IStorage"), backend(std::move(backend_)) {
         static const FunctionInfo functions[] = {
             {0, &IStorage::Read, "Read"}, {1, nullptr, "Write"},   {2, nullptr, "Flush"},
             {3, nullptr, "SetSize"},      {4, nullptr, "GetSize"}, {5, nullptr, "OperateRange"},
@@ -28,14 +29,14 @@ public:
     }
 
 private:
-    std::unique_ptr<FileSys::StorageBackend> backend;
+    FileSys::VirtualFile backend;
 
     void Read(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         const s64 offset = rp.Pop<s64>();
         const s64 length = rp.Pop<s64>();
 
-        NGLOG_DEBUG(Service_FS, "called, offset=0x{:X}, length={}", offset, length);
+        LOG_DEBUG(Service_FS, "called, offset=0x{:X}, length={}", offset, length);
 
         // Error checking
         if (length < 0) {
@@ -50,8 +51,8 @@ private:
         }
 
         // Read the data from the Storage backend
-        std::vector<u8> output(length);
-        ResultVal<size_t> res = backend->Read(offset, length, output.data());
+        std::vector<u8> output = backend->ReadBytes(length, offset);
+        auto res = MakeResult<size_t>(output.size());
         if (res.Failed()) {
             IPC::ResponseBuilder rb{ctx, 2};
             rb.Push(res.Code());
@@ -68,8 +69,8 @@ private:
 
 class IFile final : public ServiceFramework<IFile> {
 public:
-    explicit IFile(std::unique_ptr<FileSys::StorageBackend>&& backend)
-        : ServiceFramework("IFile"), backend(std::move(backend)) {
+    explicit IFile(FileSys::VirtualFile backend_)
+        : ServiceFramework("IFile"), backend(std::move(backend_)) {
         static const FunctionInfo functions[] = {
             {0, &IFile::Read, "Read"},       {1, &IFile::Write, "Write"},
             {2, &IFile::Flush, "Flush"},     {3, &IFile::SetSize, "SetSize"},
@@ -79,7 +80,7 @@ public:
     }
 
 private:
-    std::unique_ptr<FileSys::StorageBackend> backend;
+    FileSys::VirtualFile backend;
 
     void Read(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
@@ -87,7 +88,7 @@ private:
         const s64 offset = rp.Pop<s64>();
         const s64 length = rp.Pop<s64>();
 
-        NGLOG_DEBUG(Service_FS, "called, offset=0x{:X}, length={}", offset, length);
+        LOG_DEBUG(Service_FS, "called, offset=0x{:X}, length={}", offset, length);
 
         // Error checking
         if (length < 0) {
@@ -102,8 +103,8 @@ private:
         }
 
         // Read the data from the Storage backend
-        std::vector<u8> output(length);
-        ResultVal<size_t> res = backend->Read(offset, length, output.data());
+        std::vector<u8> output = backend->ReadBytes(length, offset);
+        auto res = MakeResult<size_t>(output.size());
         if (res.Failed()) {
             IPC::ResponseBuilder rb{ctx, 2};
             rb.Push(res.Code());
@@ -124,7 +125,7 @@ private:
         const s64 offset = rp.Pop<s64>();
         const s64 length = rp.Pop<s64>();
 
-        NGLOG_DEBUG(Service_FS, "called, offset=0x{:X}, length={}", offset, length);
+        LOG_DEBUG(Service_FS, "called, offset=0x{:X}, length={}", offset, length);
 
         // Error checking
         if (length < 0) {
@@ -138,9 +139,10 @@ private:
             return;
         }
 
-        // Write the data to the Storage backend
         std::vector<u8> data = ctx.ReadBuffer();
-        ResultVal<size_t> res = backend->Write(offset, length, true, data.data());
+        data.resize(length);
+        // Write the data to the Storage backend
+        auto res = MakeResult<size_t>(backend->WriteBytes(data, offset));
         if (res.Failed()) {
             IPC::ResponseBuilder rb{ctx, 2};
             rb.Push(res.Code());
@@ -152,8 +154,9 @@ private:
     }
 
     void Flush(Kernel::HLERequestContext& ctx) {
-        NGLOG_DEBUG(Service_FS, "called");
-        backend->Flush();
+        LOG_DEBUG(Service_FS, "called");
+
+        // Exists for SDK compatibiltity -- No need to flush file.
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
@@ -162,8 +165,8 @@ private:
     void SetSize(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         const u64 size = rp.Pop<u64>();
-        backend->SetSize(size);
-        NGLOG_DEBUG(Service_FS, "called, size={}", size);
+        backend->Resize(size);
+        LOG_DEBUG(Service_FS, "called, size={}", size);
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
@@ -171,7 +174,7 @@ private:
 
     void GetSize(Kernel::HLERequestContext& ctx) {
         const u64 size = backend->GetSize();
-        NGLOG_DEBUG(Service_FS, "called, size={}", size);
+        LOG_DEBUG(Service_FS, "called, size={}", size);
 
         IPC::ResponseBuilder rb{ctx, 4};
         rb.Push(RESULT_SUCCESS);
@@ -179,49 +182,73 @@ private:
     }
 };
 
+template <typename T>
+static void BuildEntryIndex(std::vector<FileSys::Entry>& entries, const std::vector<T>& new_data,
+                            FileSys::EntryType type) {
+    for (const auto& new_entry : new_data) {
+        FileSys::Entry entry;
+        entry.filename[0] = '\0';
+        std::strncat(entry.filename, new_entry->GetName().c_str(), FileSys::FILENAME_LENGTH - 1);
+        entry.type = type;
+        entry.file_size = new_entry->GetSize();
+        entries.emplace_back(std::move(entry));
+    }
+}
+
 class IDirectory final : public ServiceFramework<IDirectory> {
 public:
-    explicit IDirectory(std::unique_ptr<FileSys::DirectoryBackend>&& backend)
-        : ServiceFramework("IDirectory"), backend(std::move(backend)) {
+    explicit IDirectory(FileSys::VirtualDir backend_)
+        : ServiceFramework("IDirectory"), backend(std::move(backend_)) {
         static const FunctionInfo functions[] = {
             {0, &IDirectory::Read, "Read"},
             {1, &IDirectory::GetEntryCount, "GetEntryCount"},
         };
         RegisterHandlers(functions);
+
+        // Build entry index now to save time later.
+        BuildEntryIndex(entries, backend->GetFiles(), FileSys::File);
+        BuildEntryIndex(entries, backend->GetSubdirectories(), FileSys::Directory);
     }
 
 private:
-    std::unique_ptr<FileSys::DirectoryBackend> backend;
+    FileSys::VirtualDir backend;
+    std::vector<FileSys::Entry> entries;
+    u64 next_entry_index = 0;
 
     void Read(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         const u64 unk = rp.Pop<u64>();
 
-        NGLOG_DEBUG(Service_FS, "called, unk=0x{:X}", unk);
+        LOG_DEBUG(Service_FS, "called, unk=0x{:X}", unk);
 
         // Calculate how many entries we can fit in the output buffer
         u64 count_entries = ctx.GetWriteBufferSize() / sizeof(FileSys::Entry);
 
+        // Cap at total number of entries.
+        u64 actual_entries = std::min(count_entries, entries.size() - next_entry_index);
+
         // Read the data from the Directory backend
-        std::vector<FileSys::Entry> entries(count_entries);
-        u64 read_entries = backend->Read(count_entries, entries.data());
+        std::vector<FileSys::Entry> entry_data(entries.begin() + next_entry_index,
+                                               entries.begin() + next_entry_index + actual_entries);
+
+        next_entry_index += actual_entries;
 
         // Convert the data into a byte array
-        std::vector<u8> output(entries.size() * sizeof(FileSys::Entry));
-        std::memcpy(output.data(), entries.data(), output.size());
+        std::vector<u8> output(entry_data.size() * sizeof(FileSys::Entry));
+        std::memcpy(output.data(), entry_data.data(), output.size());
 
         // Write the data to memory
         ctx.WriteBuffer(output);
 
         IPC::ResponseBuilder rb{ctx, 4};
         rb.Push(RESULT_SUCCESS);
-        rb.Push(read_entries);
+        rb.Push(actual_entries);
     }
 
     void GetEntryCount(Kernel::HLERequestContext& ctx) {
-        NGLOG_DEBUG(Service_FS, "called");
+        LOG_DEBUG(Service_FS, "called");
 
-        u64 count = backend->GetEntryCount();
+        u64 count = entries.size() - next_entry_index;
 
         IPC::ResponseBuilder rb{ctx, 4};
         rb.Push(RESULT_SUCCESS);
@@ -231,7 +258,7 @@ private:
 
 class IFileSystem final : public ServiceFramework<IFileSystem> {
 public:
-    explicit IFileSystem(std::unique_ptr<FileSys::FileSystemBackend>&& backend)
+    explicit IFileSystem(FileSys::VirtualDir backend)
         : ServiceFramework("IFileSystem"), backend(std::move(backend)) {
         static const FunctionInfo functions[] = {
             {0, &IFileSystem::CreateFile, "CreateFile"},
@@ -258,45 +285,39 @@ public:
         IPC::RequestParser rp{ctx};
 
         auto file_buffer = ctx.ReadBuffer();
-        auto end = std::find(file_buffer.begin(), file_buffer.end(), '\0');
-
-        std::string name(file_buffer.begin(), end);
+        std::string name = Common::StringFromBuffer(file_buffer);
 
         u64 mode = rp.Pop<u64>();
         u32 size = rp.Pop<u32>();
 
-        NGLOG_DEBUG(Service_FS, "called file {} mode 0x{:X} size 0x{:08X}", name, mode, size);
+        LOG_DEBUG(Service_FS, "called file {} mode 0x{:X} size 0x{:08X}", name, mode, size);
 
         IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(backend->CreateFile(name, size));
+        rb.Push(backend.CreateFile(name, size));
     }
 
     void DeleteFile(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
 
         auto file_buffer = ctx.ReadBuffer();
-        auto end = std::find(file_buffer.begin(), file_buffer.end(), '\0');
+        std::string name = Common::StringFromBuffer(file_buffer);
 
-        std::string name(file_buffer.begin(), end);
-
-        NGLOG_DEBUG(Service_FS, "called file {}", name);
+        LOG_DEBUG(Service_FS, "called file {}", name);
 
         IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(backend->DeleteFile(name));
+        rb.Push(backend.DeleteFile(name));
     }
 
     void CreateDirectory(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
 
         auto file_buffer = ctx.ReadBuffer();
-        auto end = std::find(file_buffer.begin(), file_buffer.end(), '\0');
+        std::string name = Common::StringFromBuffer(file_buffer);
 
-        std::string name(file_buffer.begin(), end);
-
-        NGLOG_DEBUG(Service_FS, "called directory {}", name);
+        LOG_DEBUG(Service_FS, "called directory {}", name);
 
         IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(backend->CreateDirectory(name));
+        rb.Push(backend.CreateDirectory(name));
     }
 
     void RenameFile(Kernel::HLERequestContext& ctx) {
@@ -305,40 +326,36 @@ public:
         std::vector<u8> buffer;
         buffer.resize(ctx.BufferDescriptorX()[0].Size());
         Memory::ReadBlock(ctx.BufferDescriptorX()[0].Address(), buffer.data(), buffer.size());
-        auto end = std::find(buffer.begin(), buffer.end(), '\0');
-        std::string src_name(buffer.begin(), end);
+        std::string src_name = Common::StringFromBuffer(buffer);
 
         buffer.resize(ctx.BufferDescriptorX()[1].Size());
         Memory::ReadBlock(ctx.BufferDescriptorX()[1].Address(), buffer.data(), buffer.size());
-        end = std::find(buffer.begin(), buffer.end(), '\0');
-        std::string dst_name(buffer.begin(), end);
+        std::string dst_name = Common::StringFromBuffer(buffer);
 
-        NGLOG_DEBUG(Service_FS, "called file '{}' to file '{}'", src_name, dst_name);
+        LOG_DEBUG(Service_FS, "called file '{}' to file '{}'", src_name, dst_name);
 
         IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(backend->RenameFile(src_name, dst_name));
+        rb.Push(backend.RenameFile(src_name, dst_name));
     }
 
     void OpenFile(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
 
         auto file_buffer = ctx.ReadBuffer();
-        auto end = std::find(file_buffer.begin(), file_buffer.end(), '\0');
-
-        std::string name(file_buffer.begin(), end);
+        std::string name = Common::StringFromBuffer(file_buffer);
 
         auto mode = static_cast<FileSys::Mode>(rp.Pop<u32>());
 
-        NGLOG_DEBUG(Service_FS, "called file {} mode {}", name, static_cast<u32>(mode));
+        LOG_DEBUG(Service_FS, "called file {} mode {}", name, static_cast<u32>(mode));
 
-        auto result = backend->OpenFile(name, mode);
+        auto result = backend.OpenFile(name, mode);
         if (result.Failed()) {
             IPC::ResponseBuilder rb{ctx, 2};
             rb.Push(result.Code());
             return;
         }
 
-        auto file = std::move(result.Unwrap());
+        IFile file(result.Unwrap());
 
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
@@ -349,23 +366,21 @@ public:
         IPC::RequestParser rp{ctx};
 
         auto file_buffer = ctx.ReadBuffer();
-        auto end = std::find(file_buffer.begin(), file_buffer.end(), '\0');
-
-        std::string name(file_buffer.begin(), end);
+        std::string name = Common::StringFromBuffer(file_buffer);
 
         // TODO(Subv): Implement this filter.
         u32 filter_flags = rp.Pop<u32>();
 
-        NGLOG_DEBUG(Service_FS, "called directory {} filter {}", name, filter_flags);
+        LOG_DEBUG(Service_FS, "called directory {} filter {}", name, filter_flags);
 
-        auto result = backend->OpenDirectory(name);
+        auto result = backend.OpenDirectory(name);
         if (result.Failed()) {
             IPC::ResponseBuilder rb{ctx, 2};
             rb.Push(result.Code());
             return;
         }
 
-        auto directory = std::move(result.Unwrap());
+        IDirectory directory(result.Unwrap());
 
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
@@ -376,13 +391,11 @@ public:
         IPC::RequestParser rp{ctx};
 
         auto file_buffer = ctx.ReadBuffer();
-        auto end = std::find(file_buffer.begin(), file_buffer.end(), '\0');
+        std::string name = Common::StringFromBuffer(file_buffer);
 
-        std::string name(file_buffer.begin(), end);
+        LOG_DEBUG(Service_FS, "called file {}", name);
 
-        NGLOG_DEBUG(Service_FS, "called file {}", name);
-
-        auto result = backend->GetEntryType(name);
+        auto result = backend.GetEntryType(name);
         if (result.Failed()) {
             IPC::ResponseBuilder rb{ctx, 2};
             rb.Push(result.Code());
@@ -395,14 +408,14 @@ public:
     }
 
     void Commit(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_FS, "(STUBBED) called");
+        LOG_WARNING(Service_FS, "(STUBBED) called");
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
     }
 
 private:
-    std::unique_ptr<FileSys::FileSystemBackend> backend;
+    VfsDirectoryServiceWrapper backend;
 };
 
 FSP_SRV::FSP_SRV() : ServiceFramework("fsp-srv") {
@@ -503,25 +516,23 @@ void FSP_SRV::TryLoadRomFS() {
     if (romfs) {
         return;
     }
-    FileSys::Path unused;
-    auto res = OpenFileSystem(Type::RomFS, unused);
+    auto res = OpenRomFS();
     if (res.Succeeded()) {
         romfs = std::move(res.Unwrap());
     }
 }
 
 void FSP_SRV::Initialize(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
+    LOG_WARNING(Service_FS, "(STUBBED) called");
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 }
 
 void FSP_SRV::MountSdCard(Kernel::HLERequestContext& ctx) {
-    NGLOG_DEBUG(Service_FS, "called");
+    LOG_DEBUG(Service_FS, "called");
 
-    FileSys::Path unused;
-    auto filesystem = OpenFileSystem(Type::SDMC, unused).Unwrap();
+    IFileSystem filesystem(OpenFileSystem(Type::SDMC).Unwrap());
 
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
@@ -535,17 +546,16 @@ void FSP_SRV::CreateSaveData(Kernel::HLERequestContext& ctx) {
     auto save_create_struct = rp.PopRaw<std::array<u8, 0x40>>();
     u128 uid = rp.PopRaw<u128>();
 
-    NGLOG_WARNING(Service_FS, "(STUBBED) called uid = {:016X}{:016X}", uid[1], uid[0]);
+    LOG_WARNING(Service_FS, "(STUBBED) called uid = {:016X}{:016X}", uid[1], uid[0]);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
 }
 
 void FSP_SRV::MountSaveData(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
+    LOG_WARNING(Service_FS, "(STUBBED) called");
 
-    FileSys::Path unused;
-    auto filesystem = OpenFileSystem(Type::SaveData, unused).Unwrap();
+    IFileSystem filesystem(OpenFileSystem(Type::SaveData).Unwrap());
 
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
@@ -553,7 +563,7 @@ void FSP_SRV::MountSaveData(Kernel::HLERequestContext& ctx) {
 }
 
 void FSP_SRV::GetGlobalAccessLogMode(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called");
+    LOG_WARNING(Service_FS, "(STUBBED) called");
 
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(RESULT_SUCCESS);
@@ -561,33 +571,26 @@ void FSP_SRV::GetGlobalAccessLogMode(Kernel::HLERequestContext& ctx) {
 }
 
 void FSP_SRV::OpenDataStorageByCurrentProcess(Kernel::HLERequestContext& ctx) {
-    NGLOG_DEBUG(Service_FS, "called");
+    LOG_DEBUG(Service_FS, "called");
 
     TryLoadRomFS();
     if (!romfs) {
         // TODO (bunnei): Find the right error code to use here
-        NGLOG_CRITICAL(Service_FS, "no file system interface available!");
+        LOG_CRITICAL(Service_FS, "no file system interface available!");
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(ResultCode(-1));
         return;
     }
 
-    // Attempt to open a StorageBackend interface to the RomFS
-    auto storage = romfs->OpenFile({}, {});
-    if (storage.Failed()) {
-        NGLOG_CRITICAL(Service_FS, "no storage interface available!");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(storage.Code());
-        return;
-    }
+    IStorage storage(romfs);
 
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
-    rb.PushIpcInterface<IStorage>(std::move(storage.Unwrap()));
+    rb.PushIpcInterface<IStorage>(std::move(storage));
 }
 
 void FSP_SRV::OpenRomStorage(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_FS, "(STUBBED) called, using OpenDataStorageByCurrentProcess");
+    LOG_WARNING(Service_FS, "(STUBBED) called, using OpenDataStorageByCurrentProcess");
     OpenDataStorageByCurrentProcess(ctx);
 }
 

src/core/hle/service/filesystem/fsp_srv.h

@@ -29,7 +29,7 @@ private:
     void OpenDataStorageByCurrentProcess(Kernel::HLERequestContext& ctx);
     void OpenRomStorage(Kernel::HLERequestContext& ctx);
 
-    std::unique_ptr<FileSys::FileSystemBackend> romfs;
+    FileSys::VirtualFile romfs;
 };
 
 } // namespace Service::FileSystem

src/core/hle/service/friend/friend.cpp

@@ -13,7 +13,7 @@ namespace Service::Friend {
 void Module::Interface::CreateFriendService(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(RESULT_SUCCESS);
-    NGLOG_WARNING(Service_Friend, "(STUBBED) called");
+    LOG_WARNING(Service_Friend, "(STUBBED) called");
 }
 
 Module::Interface::Interface(std::shared_ptr<Module> module, const char* name)

src/core/hle/service/hid/hid.cpp

@@ -53,7 +53,7 @@ private:
         IPC::ResponseBuilder rb{ctx, 2, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushCopyObjects(shared_mem);
-        NGLOG_DEBUG(Service_HID, "called");
+        LOG_DEBUG(Service_HID, "called");
     }
 
     void LoadInputDevices() {
@@ -84,6 +84,10 @@ private:
 
         for (size_t controller = 0; controller < mem.controllers.size(); controller++) {
             for (int index = 0; index < HID_NUM_LAYOUTS; index++) {
+                // TODO(DarkLordZach): Is this layout/controller config actually invalid?
+                if (controller == Controller_Handheld && index == Layout_Single)
+                    continue;
+
                 ControllerLayout& layout = mem.controllers[controller].layouts[index];
                 layout.header.num_entries = HID_NUM_ENTRIES;
                 layout.header.max_entry_index = HID_NUM_ENTRIES - 1;
@@ -94,7 +98,6 @@ private:
                 layout.header.latest_entry = (layout.header.latest_entry + 1) % HID_NUM_ENTRIES;
 
                 ControllerInputEntry& entry = layout.entries[layout.header.latest_entry];
-                entry.connection_state = ConnectionState_Connected | ConnectionState_Wired;
                 entry.timestamp++;
                 // TODO(shinyquagsire23): Is this always identical to timestamp?
                 entry.timestamp_2++;
@@ -103,6 +106,8 @@ private:
                 if (controller != Controller_Handheld)
                     continue;
 
+                entry.connection_state = ConnectionState_Connected | ConnectionState_Wired;
+
                 // TODO(shinyquagsire23): Set up some LUTs for each layout mapping in the future?
                 // For now everything is just the default handheld layout, but split Joy-Con will
                 // rotate the face buttons and directions for certain layouts.
@@ -262,7 +267,7 @@ private:
     void ActivateVibrationDevice(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 };
 
@@ -329,6 +334,7 @@ public:
             {130, nullptr, "SwapNpadAssignment"},
             {131, nullptr, "IsUnintendedHomeButtonInputProtectionEnabled"},
             {132, nullptr, "EnableUnintendedHomeButtonInputProtection"},
+            {133, nullptr, "SetNpadJoyAssignmentModeSingleWithDestination"},
             {200, &Hid::GetVibrationDeviceInfo, "GetVibrationDeviceInfo"},
             {201, &Hid::SendVibrationValue, "SendVibrationValue"},
             {202, &Hid::GetActualVibrationValue, "GetActualVibrationValue"},
@@ -336,12 +342,41 @@ public:
             {204, nullptr, "PermitVibration"},
             {205, nullptr, "IsVibrationPermitted"},
             {206, &Hid::SendVibrationValues, "SendVibrationValues"},
+            {207, nullptr, "SendVibrationGcErmCommand"},
+            {208, nullptr, "GetActualVibrationGcErmCommand"},
+            {209, nullptr, "BeginPermitVibrationSession"},
+            {210, nullptr, "EndPermitVibrationSession"},
             {300, nullptr, "ActivateConsoleSixAxisSensor"},
             {301, nullptr, "StartConsoleSixAxisSensor"},
             {302, nullptr, "StopConsoleSixAxisSensor"},
+            {303, nullptr, "ActivateSevenSixAxisSensor"},
+            {304, nullptr, "StartSevenSixAxisSensor"},
+            {305, nullptr, "StopSevenSixAxisSensor"},
+            {306, nullptr, "InitializeSevenSixAxisSensor"},
+            {307, nullptr, "FinalizeSevenSixAxisSensor"},
+            {308, nullptr, "SetSevenSixAxisSensorFusionStrength"},
+            {309, nullptr, "GetSevenSixAxisSensorFusionStrength"},
             {400, nullptr, "IsUsbFullKeyControllerEnabled"},
             {401, nullptr, "EnableUsbFullKeyController"},
             {402, nullptr, "IsUsbFullKeyControllerConnected"},
+            {403, nullptr, "HasBattery"},
+            {404, nullptr, "HasLeftRightBattery"},
+            {405, nullptr, "GetNpadInterfaceType"},
+            {406, nullptr, "GetNpadLeftRightInterfaceType"},
+            {500, nullptr, "GetPalmaConnectionHandle"},
+            {501, nullptr, "InitializePalma"},
+            {502, nullptr, "AcquirePalmaOperationCompleteEvent"},
+            {503, nullptr, "GetPalmaOperationInfo"},
+            {504, nullptr, "PlayPalmaActivity"},
+            {505, nullptr, "SetPalmaFrModeType"},
+            {506, nullptr, "ReadPalmaStep"},
+            {507, nullptr, "EnablePalmaStep"},
+            {508, nullptr, "SuspendPalmaStep"},
+            {509, nullptr, "ResetPalmaStep"},
+            {510, nullptr, "ReadPalmaApplicationSection"},
+            {511, nullptr, "WritePalmaApplicationSection"},
+            {512, nullptr, "ReadPalmaUniqueCode"},
+            {513, nullptr, "SetPalmaUniqueCodeInvalid"},
             {1000, nullptr, "SetNpadCommunicationMode"},
             {1001, nullptr, "GetNpadCommunicationMode"},
         };
@@ -364,144 +399,144 @@ private:
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IAppletResource>(applet_resource);
-        NGLOG_DEBUG(Service_HID, "called");
+        LOG_DEBUG(Service_HID, "called");
     }
 
     void ActivateDebugPad(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void ActivateTouchScreen(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void ActivateMouse(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void ActivateKeyboard(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void StartSixAxisSensor(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void SetGyroscopeZeroDriftMode(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void SetSupportedNpadStyleSet(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void GetSupportedNpadStyleSet(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
         rb.Push<u32>(0);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void SetSupportedNpadIdType(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void ActivateNpad(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void AcquireNpadStyleSetUpdateEventHandle(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushCopyObjects(event);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void GetPlayerLedPattern(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void SetNpadJoyHoldType(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void GetNpadJoyHoldType(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
         rb.Push(joy_hold_type);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void SetNpadJoyAssignmentModeSingleByDefault(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void SendVibrationValue(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void GetActualVibrationValue(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void SetNpadJoyAssignmentModeDual(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void SetNpadHandheldActivationMode(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void GetVibrationDeviceInfo(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 4};
         rb.Push(RESULT_SUCCESS);
         rb.Push<u64>(0);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 
     void CreateActiveVibrationDeviceList(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2, 0, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushIpcInterface<IActiveVibrationDeviceList>();
-        NGLOG_DEBUG(Service_HID, "called");
+        LOG_DEBUG(Service_HID, "called");
     }
 
     void SendVibrationValues(Kernel::HLERequestContext& ctx) {
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-        NGLOG_WARNING(Service_HID, "(STUBBED) called");
+        LOG_WARNING(Service_HID, "(STUBBED) called");
     }
 };
 

src/core/hle/service/lm/lm.cpp

@@ -141,19 +141,19 @@ private:
         if (header.IsTailLog()) {
             switch (header.severity) {
             case MessageHeader::Severity::Trace:
-                NGLOG_TRACE(Debug_Emulated, "{}", log_stream.str());
+                LOG_TRACE(Debug_Emulated, "{}", log_stream.str());
                 break;
             case MessageHeader::Severity::Info:
-                NGLOG_INFO(Debug_Emulated, "{}", log_stream.str());
+                LOG_INFO(Debug_Emulated, "{}", log_stream.str());
                 break;
             case MessageHeader::Severity::Warning:
-                NGLOG_WARNING(Debug_Emulated, "{}", log_stream.str());
+                LOG_WARNING(Debug_Emulated, "{}", log_stream.str());
                 break;
             case MessageHeader::Severity::Error:
-                NGLOG_ERROR(Debug_Emulated, "{}", log_stream.str());
+                LOG_ERROR(Debug_Emulated, "{}", log_stream.str());
                 break;
             case MessageHeader::Severity::Critical:
-                NGLOG_CRITICAL(Debug_Emulated, "{}", log_stream.str());
+                LOG_CRITICAL(Debug_Emulated, "{}", log_stream.str());
                 break;
             }
         }
@@ -178,7 +178,7 @@ void LM::Initialize(Kernel::HLERequestContext& ctx) {
     rb.Push(RESULT_SUCCESS);
     rb.PushIpcInterface<Logger>();
 
-    NGLOG_DEBUG(Service_LM, "called");
+    LOG_DEBUG(Service_LM, "called");
 }
 
 LM::LM() : ServiceFramework("lm") {