Fix typo

- Debugging of threads should work correctly with source and assembly level stepping and modifying registers and memory, meaning threads and callstacks are fully clickable in VS.
- List of modules is available to the client, with assumption that .nro and .nso are backed up by an .elf with symbols, while deconstructed ROMs keep N names.
- Initial support for floating point registers.

src/core/arm/dynarmic/arm_dynarmic.cpp

@@ -10,6 +10,7 @@
 #include "core/arm/dynarmic/arm_dynarmic.h"
 #include "core/core.h"
 #include "core/core_timing.h"
+#include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/svc.h"
 #include "core/memory.h"

src/core/arm/unicorn/arm_unicorn.cpp

@@ -203,7 +203,7 @@ void ARM_Unicorn::ExecuteInstructions(int num_instructions) {
         }
         Kernel::Thread* thread = Kernel::GetCurrentThread();
         SaveContext(thread->context);
-        if (last_bkpt_hit || (num_instructions == 1)) {
+        if (last_bkpt_hit || GDBStub::GetCpuStepFlag()) {
             last_bkpt_hit = false;
             GDBStub::Break();
             GDBStub::SendTrap(thread, 5);

src/core/core.cpp

@@ -62,7 +62,6 @@ System::ResultStatus System::RunLoop(bool tight_loop) {
         // execute. Otherwise, get out of the loop function.
         if (GDBStub::GetCpuHaltFlag()) {
             if (GDBStub::GetCpuStepFlag()) {
-                GDBStub::SetCpuStepFlag(false);
                 tight_loop = false;
             } else {
                 return ResultStatus::Success;
@@ -78,6 +77,11 @@ System::ResultStatus System::RunLoop(bool tight_loop) {
         }
     }
 
+    if (GDBStub::IsServerEnabled()) {
+        GDBStub::SetCpuStepFlag(false);
+        GDBStub::SetInstCacheValidity(true);
+    }
+
     return status;
 }
 

src/core/core.h

@@ -82,6 +82,17 @@ public:
      */
     ResultStatus SingleStep();
 
+    /**
+     * Invalidate the CPU instruction caches
+     * This function should only be used by GDBStub which is supposed to keep things
+     * synch'ed to its internal instruction cache validity flag.
+     */
+    void InvalidateCpuInstructionCaches() {
+        for (auto& cpu : cpu_cores) {
+            cpu->ArmInterface().ClearInstructionCache();
+        }
+    }
+
     /// Shutdown the emulated system.
     void Shutdown();
 

src/core/gdbstub/gdbstub.cpp

@@ -160,6 +160,7 @@ u16 gdbstub_port = 24689;
 bool halt_loop = true;
 bool step_loop = false;
 bool send_trap = false;
+bool inst_cache_valid = true;
 
 // If set to false, the server will never be started and no
 // gdbstub-related functions will be executed.
@@ -173,6 +174,7 @@ struct Breakpoint {
     bool active;
     VAddr addr;
     u64 len;
+    u8 inst[4];
 };
 
 using BreakpointMap = std::map<VAddr, Breakpoint>;
@@ -453,6 +455,8 @@ static void RemoveBreakpoint(BreakpointType type, VAddr addr) {
 
     LOG_DEBUG(Debug_GDBStub, "gdb: removed a breakpoint: {:016X} bytes at {:016X} of type {}",
               bp->second.len, bp->second.addr, static_cast<int>(type));
+    Memory::WriteBlock(bp->second.addr, bp->second.inst, 4);
+    GDBStub::SetInstCacheValidity(false);
     p.erase(addr);
 }
 
@@ -937,6 +941,7 @@ static void WriteMemory() {
 
     GdbHexToMem(data.data(), len_pos + 1, len);
     Memory::WriteBlock(addr, data.data(), len);
+    GDBStub::SetInstCacheValidity(false);
     SendReply("OK");
 }
 
@@ -956,6 +961,7 @@ static void Step() {
     step_loop = true;
     halt_loop = true;
     send_trap = true;
+    GDBStub::SetInstCacheValidity(false);
 }
 
 /// Tell the CPU if we hit a memory breakpoint.
@@ -972,6 +978,7 @@ static void Continue() {
     memory_break = false;
     step_loop = false;
     halt_loop = false;
+    GDBStub::SetInstCacheValidity(false);
 }
 
 /**
@@ -988,6 +995,10 @@ static bool CommitBreakpoint(BreakpointType type, VAddr addr, u64 len) {
     breakpoint.active = true;
     breakpoint.addr = addr;
     breakpoint.len = len;
+    Memory::ReadBlock(addr, breakpoint.inst, 4);
+    static const u8 btrap[] = {0xd4, 0x20, 0x7d, 0x00};
+    Memory::WriteBlock(addr, btrap, 4);
+    GDBStub::SetInstCacheValidity(false);
     p.insert({addr, breakpoint});
 
     LOG_DEBUG(Debug_GDBStub, "gdb: added {} breakpoint: {:016X} bytes at {:016X}",
@@ -1305,4 +1316,15 @@ void SendTrap(Kernel::Thread* thread, int trap) {
         send_trap = false;
     }
 }
+
+void SetInstCacheValidity(bool is_valid) {
+    inst_cache_valid = is_valid;
+    if (!inst_cache_valid) {
+        Core::System::GetInstance().InvalidateCpuInstructionCaches();
+    }
+}
+
+bool GetInstCacheValidity() {
+    return inst_cache_valid;
+}
 }; // namespace GDBStub

src/core/gdbstub/gdbstub.h

@@ -104,4 +104,10 @@ void SetCpuStepFlag(bool is_step);
  * @param trap Trap no.
  */
 void SendTrap(Kernel::Thread* thread, int trap);
+
+/// Set instruction cache validity.
+void SetInstCacheValidity(bool is_valid);
+
+/// Get instruction cache validity.
+bool GetInstCacheValidity();
 } // namespace GDBStub

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

@@ -296,6 +296,10 @@ void RegisterFileSystems() {
 
     auto sdcard = std::make_unique<FileSys::SDMCFactory>(std::move(sd_directory));
     sdmc_factory = std::move(sdcard);
+
+    auto romfs =
+        std::make_unique<FileSys::RomFSFactory>(Core::System::GetInstance().GetAppLoader());
+    romfs_factory = std::move(romfs);
 }
 
 void InstallInterfaces(SM::ServiceManager& service_manager) {

src/core/hle/service/vi/vi.cpp

@@ -551,7 +551,7 @@ private:
         } else if (transaction == TransactionId::CancelBuffer) {
             LOG_CRITICAL(Service_VI, "(STUBBED) called, transaction=CancelBuffer");
         } else {
-            ASSERT_MSG(false, "Unimplemented");
+            UNIMPLEMENTED();
         }
 
         IPC::ResponseBuilder rb{ctx, 2};

src/yuzu/configuration/configure_debug.ui

@@ -22,13 +22,6 @@
         <string>GDB</string>
        </property>
        <layout class="QVBoxLayout" name="verticalLayout_3">
-        <item>
-         <widget class="QLabel" name="label_1">
-          <property name="text">
-           <string>The GDB Stub only works correctly when the CPU JIT is off.</string>
-          </property>
-         </widget>
-        </item>
         <item>
          <layout class="QHBoxLayout" name="horizontalLayout_1">
           <item>