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-rw-r--r--src/citra/citra.cpp3
-rw-r--r--src/citra/config.cpp4
-rw-r--r--src/citra/default_ini.h5
-rw-r--r--src/citra_qt/config.cpp10
-rw-r--r--src/citra_qt/main.cpp11
-rw-r--r--src/citra_qt/main.h1
-rw-r--r--src/citra_qt/main.ui9
-rw-r--r--src/common/logging/backend.cpp1
-rw-r--r--src/common/logging/log.h1
-rw-r--r--src/core/CMakeLists.txt2
-rw-r--r--src/core/arm/dyncom/arm_dyncom_interpreter.cpp40
-rw-r--r--src/core/arm/skyeye_common/armstate.cpp35
-rw-r--r--src/core/arm/skyeye_common/armstate.h2
-rw-r--r--src/core/core.cpp17
-rw-r--r--src/core/gdbstub/gdbstub.cpp955
-rw-r--r--src/core/gdbstub/gdbstub.h94
-rw-r--r--src/core/settings.h5
-rw-r--r--src/core/system.cpp4
18 files changed, 1190 insertions, 9 deletions
diff --git a/src/citra/citra.cpp b/src/citra/citra.cpp
index 46f4a07c9..c96fc1374 100644
--- a/src/citra/citra.cpp
+++ b/src/citra/citra.cpp
@@ -23,6 +23,7 @@
#include "core/settings.h"
#include "core/system.h"
#include "core/core.h"
+#include "core/gdbstub/gdbstub.h"
#include "core/loader/loader.h"
#include "citra/config.h"
@@ -72,6 +73,8 @@ int main(int argc, char **argv) {
Config config;
log_filter.ParseFilterString(Settings::values.log_filter);
+ GDBStub::ToggleServer(Settings::values.use_gdbstub);
+ GDBStub::SetServerPort(static_cast<u32>(Settings::values.gdbstub_port));
EmuWindow_GLFW* emu_window = new EmuWindow_GLFW;
diff --git a/src/citra/config.cpp b/src/citra/config.cpp
index 8a98bda87..2f13c29a2 100644
--- a/src/citra/config.cpp
+++ b/src/citra/config.cpp
@@ -75,6 +75,10 @@ void Config::ReadValues() {
// Miscellaneous
Settings::values.log_filter = glfw_config->Get("Miscellaneous", "log_filter", "*:Info");
+
+ // Debugging
+ Settings::values.use_gdbstub = glfw_config->GetBoolean("Debugging", "use_gdbstub", false);
+ Settings::values.gdbstub_port = glfw_config->GetInteger("Debugging", "gdbstub_port", 24689);
}
void Config::Reload() {
diff --git a/src/citra/default_ini.h b/src/citra/default_ini.h
index 7e5d49729..5ba40a8ed 100644
--- a/src/citra/default_ini.h
+++ b/src/citra/default_ini.h
@@ -66,6 +66,11 @@ region_value =
# A filter which removes logs below a certain logging level.
# Examples: *:Debug Kernel.SVC:Trace Service.*:Critical
log_filter = *:Info
+
+[Debugging]
+# Port for listening to GDB connections.
+use_gdbstub=false
+gdbstub_port=24689
)";
}
diff --git a/src/citra_qt/config.cpp b/src/citra_qt/config.cpp
index 1f4981ce1..8e247ff5c 100644
--- a/src/citra_qt/config.cpp
+++ b/src/citra_qt/config.cpp
@@ -62,6 +62,11 @@ void Config::ReadValues() {
qt_config->beginGroup("Miscellaneous");
Settings::values.log_filter = qt_config->value("log_filter", "*:Info").toString().toStdString();
qt_config->endGroup();
+
+ qt_config->beginGroup("Debugging");
+ Settings::values.use_gdbstub = qt_config->value("use_gdbstub", false).toBool();
+ Settings::values.gdbstub_port = qt_config->value("gdbstub_port", 24689).toInt();
+ qt_config->endGroup();
}
void Config::SaveValues() {
@@ -97,6 +102,11 @@ void Config::SaveValues() {
qt_config->beginGroup("Miscellaneous");
qt_config->setValue("log_filter", QString::fromStdString(Settings::values.log_filter));
qt_config->endGroup();
+
+ qt_config->beginGroup("Debugging");
+ qt_config->setValue("use_gdbstub", Settings::values.use_gdbstub);
+ qt_config->setValue("gdbstub_port", Settings::values.gdbstub_port);
+ qt_config->endGroup();
}
void Config::Reload() {
diff --git a/src/citra_qt/main.cpp b/src/citra_qt/main.cpp
index bcff6be64..d6c27f0df 100644
--- a/src/citra_qt/main.cpp
+++ b/src/citra_qt/main.cpp
@@ -44,6 +44,7 @@
#include "core/settings.h"
#include "core/system.h"
#include "core/arm/disassembler/load_symbol_map.h"
+#include "core/gdbstub/gdbstub.h"
#include "core/loader/loader.h"
#include "video_core/video_core.h"
@@ -143,6 +144,11 @@ GMainWindow::GMainWindow() : emu_thread(nullptr)
game_list->LoadInterfaceLayout(settings);
+ ui.action_Use_Gdbstub->setChecked(Settings::values.use_gdbstub);
+ SetGdbstubEnabled(ui.action_Use_Gdbstub->isChecked());
+
+ GDBStub::SetServerPort(static_cast<u32>(Settings::values.gdbstub_port));
+
ui.action_Use_Hardware_Renderer->setChecked(Settings::values.use_hw_renderer);
SetHardwareRendererEnabled(ui.action_Use_Hardware_Renderer->isChecked());
@@ -175,6 +181,7 @@ GMainWindow::GMainWindow() : emu_thread(nullptr)
connect(ui.action_Stop, SIGNAL(triggered()), this, SLOT(OnStopGame()));
connect(ui.action_Use_Hardware_Renderer, SIGNAL(triggered(bool)), this, SLOT(SetHardwareRendererEnabled(bool)));
connect(ui.action_Use_Shader_JIT, SIGNAL(triggered(bool)), this, SLOT(SetShaderJITEnabled(bool)));
+ connect(ui.action_Use_Gdbstub, SIGNAL(triggered(bool)), this, SLOT(SetGdbstubEnabled(bool)));
connect(ui.action_Single_Window_Mode, SIGNAL(triggered(bool)), this, SLOT(ToggleWindowMode()));
connect(ui.action_Hotkeys, SIGNAL(triggered()), this, SLOT(OnOpenHotkeysDialog()));
@@ -449,6 +456,10 @@ void GMainWindow::SetHardwareRendererEnabled(bool enabled) {
config.Save();
}
+void GMainWindow::SetGdbstubEnabled(bool enabled) {
+ GDBStub::ToggleServer(enabled);
+}
+
void GMainWindow::SetShaderJITEnabled(bool enabled) {
VideoCore::g_shader_jit_enabled = enabled;
diff --git a/src/citra_qt/main.h b/src/citra_qt/main.h
index 6d27ce6a9..f6d429cd9 100644
--- a/src/citra_qt/main.h
+++ b/src/citra_qt/main.h
@@ -99,6 +99,7 @@ private slots:
void OnConfigure();
void OnDisplayTitleBars(bool);
void SetHardwareRendererEnabled(bool);
+ void SetGdbstubEnabled(bool);
void SetShaderJITEnabled(bool);
void ToggleWindowMode();
diff --git a/src/citra_qt/main.ui b/src/citra_qt/main.ui
index 997597642..1e8a07cfb 100644
--- a/src/citra_qt/main.ui
+++ b/src/citra_qt/main.ui
@@ -75,6 +75,7 @@
<addaction name="separator"/>
<addaction name="action_Use_Hardware_Renderer"/>
<addaction name="action_Use_Shader_JIT"/>
+ <addaction name="action_Use_Gdbstub"/>
<addaction name="action_Configure"/>
</widget>
<widget class="QMenu" name="menu_View">
@@ -170,6 +171,14 @@
<string>Use Shader JIT</string>
</property>
</action>
+ <action name="action_Use_Gdbstub">
+ <property name="checkable">
+ <bool>true</bool>
+ </property>
+ <property name="text">
+ <string>Use Gdbstub</string>
+ </property>
+ </action>
<action name="action_Configure">
<property name="text">
<string>Configure ...</string>
diff --git a/src/common/logging/backend.cpp b/src/common/logging/backend.cpp
index 92e8e742d..21a9ae8d0 100644
--- a/src/common/logging/backend.cpp
+++ b/src/common/logging/backend.cpp
@@ -29,6 +29,7 @@ namespace Log {
SUB(Debug, Emulated) \
SUB(Debug, GPU) \
SUB(Debug, Breakpoint) \
+ SUB(Debug, GDBStub) \
CLS(Kernel) \
SUB(Kernel, SVC) \
CLS(Service) \
diff --git a/src/common/logging/log.h b/src/common/logging/log.h
index 5fd3bd7f5..43f0c59e4 100644
--- a/src/common/logging/log.h
+++ b/src/common/logging/log.h
@@ -43,6 +43,7 @@ enum class Class : ClassType {
Debug_Emulated, ///< Debug messages from the emulated programs
Debug_GPU, ///< GPU debugging tools
Debug_Breakpoint, ///< Logging breakpoints and watchpoints
+ Debug_GDBStub, ///< GDB Stub
Kernel, ///< The HLE implementation of the CTR kernel
Kernel_SVC, ///< Kernel system calls
Service, ///< HLE implementation of system services. Each major service
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index c17290b9b..861b711c7 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -22,6 +22,7 @@ set(SRCS
file_sys/archive_systemsavedata.cpp
file_sys/disk_archive.cpp
file_sys/ivfc_archive.cpp
+ gdbstub/gdbstub.cpp
hle/config_mem.cpp
hle/hle.cpp
hle/applets/applet.cpp
@@ -149,6 +150,7 @@ set(HEADERS
file_sys/disk_archive.h
file_sys/file_backend.h
file_sys/ivfc_archive.h
+ gdbstub/gdbstub.h
hle/config_mem.h
hle/function_wrappers.h
hle/hle.h
diff --git a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
index fbd6f94f9..96c88c83a 100644
--- a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
+++ b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
@@ -23,6 +23,8 @@
#include "core/arm/skyeye_common/armsupp.h"
#include "core/arm/skyeye_common/vfp/vfp.h"
+#include "core/gdbstub/gdbstub.h"
+
Common::Profiling::TimingCategory profile_execute("DynCom::Execute");
Common::Profiling::TimingCategory profile_decode("DynCom::Decode");
@@ -3548,6 +3550,7 @@ static int InterpreterTranslate(ARMul_State* cpu, int& bb_start, u32 addr) {
CITRA_IGNORE_EXIT(-1);
}
inst_base = arm_instruction_trans[idx](inst, idx);
+
translated:
phys_addr += inst_size;
@@ -3580,6 +3583,8 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
Common::Profiling::ScopeTimer timer_execute(profile_execute);
MICROPROFILE_SCOPE(DynCom_Execute);
+ GDBStub::BreakpointAddress breakpoint_data;
+
#undef RM
#undef RS
@@ -3604,15 +3609,27 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
#define INC_PC(l) ptr += sizeof(arm_inst) + l
#define INC_PC_STUB ptr += sizeof(arm_inst)
+#define GDB_BP_CHECK \
+ cpu->Cpsr &= ~(1 << 5); \
+ cpu->Cpsr |= cpu->TFlag << 5; \
+ if (GDBStub::g_server_enabled) { \
+ if (GDBStub::IsMemoryBreak() || (breakpoint_data.type != GDBStub::BreakpointType::None && PC == breakpoint_data.address)) { \
+ GDBStub::Break(); \
+ goto END; \
+ } \
+ }
+
// GCC and Clang have a C++ extension to support a lookup table of labels. Otherwise, fallback to a
// clunky switch statement.
#if defined __GNUC__ || defined __clang__
#define GOTO_NEXT_INST \
+ GDB_BP_CHECK; \
if (num_instrs >= cpu->NumInstrsToExecute) goto END; \
num_instrs++; \
goto *InstLabel[inst_base->idx]
#else
#define GOTO_NEXT_INST \
+ GDB_BP_CHECK; \
if (num_instrs >= cpu->NumInstrsToExecute) goto END; \
num_instrs++; \
switch(inst_base->idx) { \
@@ -3903,6 +3920,11 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
goto END;
}
+ // Find breakpoint if one exists within the block
+ if (GDBStub::g_server_enabled && GDBStub::IsConnected()) {
+ breakpoint_data = GDBStub::GetNextBreakpointFromAddress(cpu->Reg[15], GDBStub::BreakpointType::Execute);
+ }
+
inst_base = (arm_inst *)&inst_buf[ptr];
GOTO_NEXT_INST;
}
@@ -4454,7 +4476,7 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr);
- cpu->Reg[BITS(inst_cream->inst, 12, 15)] = Memory::Read8(addr);
+ cpu->Reg[BITS(inst_cream->inst, 12, 15)] = cpu->ReadMemory8(addr);
if (BITS(inst_cream->inst, 12, 15) == 15) {
INC_PC(sizeof(ldst_inst));
@@ -4472,7 +4494,7 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr);
- cpu->Reg[BITS(inst_cream->inst, 12, 15)] = Memory::Read8(addr);
+ cpu->Reg[BITS(inst_cream->inst, 12, 15)] = cpu->ReadMemory8(addr);
if (BITS(inst_cream->inst, 12, 15) == 15) {
INC_PC(sizeof(ldst_inst));
@@ -4531,7 +4553,7 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
cpu->SetExclusiveMemoryAddress(read_addr);
- RD = Memory::Read8(read_addr);
+ RD = cpu->ReadMemory8(read_addr);
if (inst_cream->Rd == 15) {
INC_PC(sizeof(generic_arm_inst));
goto DISPATCH;
@@ -4604,7 +4626,7 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
if (inst_base->cond == ConditionCode::AL || CondPassed(cpu, inst_base->cond)) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr);
- unsigned int value = Memory::Read8(addr);
+ unsigned int value = cpu->ReadMemory8(addr);
if (BIT(value, 7)) {
value |= 0xffffff00;
}
@@ -6027,7 +6049,7 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr);
unsigned int value = cpu->Reg[BITS(inst_cream->inst, 12, 15)] & 0xff;
- Memory::Write8(addr, value);
+ cpu->WriteMemory8(addr, value);
}
cpu->Reg[15] += cpu->GetInstructionSize();
INC_PC(sizeof(ldst_inst));
@@ -6040,7 +6062,7 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr);
unsigned int value = cpu->Reg[BITS(inst_cream->inst, 12, 15)] & 0xff;
- Memory::Write8(addr, value);
+ cpu->WriteMemory8(addr, value);
}
cpu->Reg[15] += cpu->GetInstructionSize();
INC_PC(sizeof(ldst_inst));
@@ -6091,7 +6113,7 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
if (cpu->IsExclusiveMemoryAccess(write_addr)) {
cpu->UnsetExclusiveMemoryAddress();
- Memory::Write8(write_addr, cpu->Reg[inst_cream->Rm]);
+ cpu->WriteMemory8(write_addr, cpu->Reg[inst_cream->Rm]);
RD = 0;
} else {
// Failed to write due to mutex access
@@ -6250,8 +6272,8 @@ unsigned InterpreterMainLoop(ARMul_State* cpu) {
if (inst_base->cond == ConditionCode::AL || CondPassed(cpu, inst_base->cond)) {
swp_inst* inst_cream = (swp_inst*)inst_base->component;
addr = RN;
- unsigned int value = Memory::Read8(addr);
- Memory::Write8(addr, (RM & 0xFF));
+ unsigned int value = cpu->ReadMemory8(addr);
+ cpu->WriteMemory8(addr, (RM & 0xFF));
RD = value;
}
cpu->Reg[15] += cpu->GetInstructionSize();
diff --git a/src/core/arm/skyeye_common/armstate.cpp b/src/core/arm/skyeye_common/armstate.cpp
index 0491717dc..2d814345a 100644
--- a/src/core/arm/skyeye_common/armstate.cpp
+++ b/src/core/arm/skyeye_common/armstate.cpp
@@ -7,6 +7,7 @@
#include "core/memory.h"
#include "core/arm/skyeye_common/armstate.h"
#include "core/arm/skyeye_common/vfp/vfp.h"
+#include "core/gdbstub/gdbstub.h"
ARMul_State::ARMul_State(PrivilegeMode initial_mode)
{
@@ -185,8 +186,25 @@ void ARMul_State::ResetMPCoreCP15Registers()
CP15[CP15_TLB_DEBUG_CONTROL] = 0x00000000;
}
+static void CheckMemoryBreakpoint(u32 address, GDBStub::BreakpointType type)
+{
+ if (GDBStub::g_server_enabled && GDBStub::CheckBreakpoint(address, type)) {
+ LOG_DEBUG(Debug, "Found memory breakpoint @ %08x", address);
+ GDBStub::Break(true);
+ }
+}
+
+u8 ARMul_State::ReadMemory8(u32 address) const
+{
+ CheckMemoryBreakpoint(address, GDBStub::BreakpointType::Read);
+
+ return Memory::Read8(address);
+}
+
u16 ARMul_State::ReadMemory16(u32 address) const
{
+ CheckMemoryBreakpoint(address, GDBStub::BreakpointType::Read);
+
u16 data = Memory::Read16(address);
if (InBigEndianMode())
@@ -197,6 +215,8 @@ u16 ARMul_State::ReadMemory16(u32 address) const
u32 ARMul_State::ReadMemory32(u32 address) const
{
+ CheckMemoryBreakpoint(address, GDBStub::BreakpointType::Read);
+
u32 data = Memory::Read32(address);
if (InBigEndianMode())
@@ -207,6 +227,8 @@ u32 ARMul_State::ReadMemory32(u32 address) const
u64 ARMul_State::ReadMemory64(u32 address) const
{
+ CheckMemoryBreakpoint(address, GDBStub::BreakpointType::Read);
+
u64 data = Memory::Read64(address);
if (InBigEndianMode())
@@ -215,8 +237,17 @@ u64 ARMul_State::ReadMemory64(u32 address) const
return data;
}
+void ARMul_State::WriteMemory8(u32 address, u8 data)
+{
+ CheckMemoryBreakpoint(address, GDBStub::BreakpointType::Write);
+
+ Memory::Write8(address, data);
+}
+
void ARMul_State::WriteMemory16(u32 address, u16 data)
{
+ CheckMemoryBreakpoint(address, GDBStub::BreakpointType::Write);
+
if (InBigEndianMode())
data = Common::swap16(data);
@@ -225,6 +256,8 @@ void ARMul_State::WriteMemory16(u32 address, u16 data)
void ARMul_State::WriteMemory32(u32 address, u32 data)
{
+ CheckMemoryBreakpoint(address, GDBStub::BreakpointType::Write);
+
if (InBigEndianMode())
data = Common::swap32(data);
@@ -233,6 +266,8 @@ void ARMul_State::WriteMemory32(u32 address, u32 data)
void ARMul_State::WriteMemory64(u32 address, u64 data)
{
+ CheckMemoryBreakpoint(address, GDBStub::BreakpointType::Write);
+
if (InBigEndianMode())
data = Common::swap64(data);
diff --git a/src/core/arm/skyeye_common/armstate.h b/src/core/arm/skyeye_common/armstate.h
index ceb159d14..98dad9b1f 100644
--- a/src/core/arm/skyeye_common/armstate.h
+++ b/src/core/arm/skyeye_common/armstate.h
@@ -153,9 +153,11 @@ public:
// Reads/writes data in big/little endian format based on the
// state of the E (endian) bit in the APSR.
+ u8 ReadMemory8(u32 address) const;
u16 ReadMemory16(u32 address) const;
u32 ReadMemory32(u32 address) const;
u64 ReadMemory64(u32 address) const;
+ void WriteMemory8(u32 address, u8 data);
void WriteMemory16(u32 address, u16 data);
void WriteMemory32(u32 address, u32 data);
void WriteMemory64(u32 address, u64 data);
diff --git a/src/core/core.cpp b/src/core/core.cpp
index dddc16708..219b03af4 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -13,6 +13,8 @@
#include "core/hle/kernel/thread.h"
#include "core/hw/hw.h"
+#include "core/gdbstub/gdbstub.h"
+
namespace Core {
ARM_Interface* g_app_core = nullptr; ///< ARM11 application core
@@ -20,6 +22,21 @@ ARM_Interface* g_sys_core = nullptr; ///< ARM11 system (OS) core
/// Run the core CPU loop
void RunLoop(int tight_loop) {
+ if (GDBStub::g_server_enabled) {
+ GDBStub::HandlePacket();
+
+ // If the loop is halted and we want to step, use a tiny (1) number of instructions to execute.
+ // Otherwise get out of the loop function.
+ if (GDBStub::GetCpuHaltFlag()) {
+ if (GDBStub::GetCpuStepFlag()) {
+ GDBStub::SetCpuStepFlag(false);
+ tight_loop = 1;
+ } else {
+ return;
+ }
+ }
+ }
+
// 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) {
diff --git a/src/core/gdbstub/gdbstub.cpp b/src/core/gdbstub/gdbstub.cpp
new file mode 100644
index 000000000..003ce4167
--- /dev/null
+++ b/src/core/gdbstub/gdbstub.cpp
@@ -0,0 +1,955 @@
+// Copyright 2013 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+// Originally written by Sven Peter <sven@fail0verflow.com> for anergistic.
+
+#include <algorithm>
+#include <climits>
+#include <csignal>
+#include <cstdarg>
+#include <cstdio>
+#include <cstring>
+#include <fcntl.h>
+#include <map>
+#include <numeric>
+
+#ifdef _MSC_VER
+#include <WinSock2.h>
+#include <ws2tcpip.h>
+#include <common/x64/abi.h>
+#include <io.h>
+#include <iphlpapi.h>
+#define SHUT_RDWR 2
+#else
+#include <unistd.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#endif
+
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/memory.h"
+#include "core/arm/arm_interface.h"
+#include "core/gdbstub/gdbstub.h"
+
+const int GDB_BUFFER_SIZE = 10000;
+
+const char GDB_STUB_START = '$';
+const char GDB_STUB_END = '#';
+const char GDB_STUB_ACK = '+';
+const char GDB_STUB_NACK = '-';
+
+#ifndef SIGTRAP
+const u32 SIGTRAP = 5;
+#endif
+
+#ifndef SIGTERM
+const u32 SIGTERM = 15;
+#endif
+
+#ifndef MSG_WAITALL
+const u32 MSG_WAITALL = 8;
+#endif
+
+const u32 R0_REGISTER = 0;
+const u32 R15_REGISTER = 15;
+const u32 CSPR_REGISTER = 25;
+const u32 FPSCR_REGISTER = 58;
+const u32 MAX_REGISTERS = 90;
+
+namespace GDBStub {
+
+static int gdbserver_socket = -1;
+
+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;
+
+// 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;
+std::atomic<bool> g_server_enabled(false);
+
+#ifdef _WIN32
+WSADATA InitData;
+#endif
+
+struct Breakpoint {
+ bool active;
+ PAddr addr;
+ u32 len;
+};
+
+static std::map<u32, Breakpoint> breakpoints_execute;
+static std::map<u32, Breakpoint> breakpoints_read;
+static std::map<u32, Breakpoint> breakpoints_write;
+
+/**
+ * Turns hex string character into the equivalent byte.
+ *
+ * @param hex Input hex character to be turned into byte.
+ */
+static u8 HexCharToValue(u8 hex) {
+ if (hex >= '0' && hex <= '9') {
+ return hex - '0';
+ } else if (hex >= 'a' && hex <= 'f') {
+ return hex - 'a' + 0xA;
+ } else if (hex >= 'A' && hex <= 'F') {
+ return hex - 'A' + 0xA;
+ }
+
+ LOG_ERROR(Debug_GDBStub, "Invalid nibble: %c (%02x)\n", hex, hex);
+ return 0;
+}
+
+/**
+ * Turn nibble of byte into hex string character.
+ *
+ * @param n Nibble to be turned into hex character.
+ */
+static u8 NibbleToHex(u8 n) {
+ n &= 0xF;
+ if (n < 0xA) {
+ return '0' + n;
+ } else {
+ return 'A' + n - 0xA;
+ }
+}
+
+/**
+* Converts input hex string characters into an array of equivalent of u8 bytes.
+*
+* @param dest Pointer to buffer to store u8 bytes.
+* @param src Pointer to array of output hex string characters.
+* @param len Length of src array.
+*/
+static u32 HexToInt(u8* src, u32 len) {
+ u32 output = 0;
+ while (len-- > 0) {
+ output = (output << 4) | HexCharToValue(src[0]);
+ src++;
+ }
+ return output;
+}
+
+/**
+ * Converts input array of u8 bytes into their equivalent hex string characters.
+ *
+ * @param dest Pointer to buffer to store output hex string characters.
+ * @param src Pointer to array of u8 bytes.
+ * @param len Length of src array.
+ */
+static void MemToGdbHex(u8* dest, u8* src, u32 len) {
+ while (len-- > 0) {
+ u8 tmp = *src++;
+ *dest++ = NibbleToHex(tmp >> 4);
+ *dest++ = NibbleToHex(tmp);
+ }
+}
+
+/**
+ * Converts input gdb-formatted hex string characters into an array of equivalent of u8 bytes.
+ *
+ * @param dest Pointer to buffer to store u8 bytes.
+ * @param src Pointer to array of output hex string characters.
+ * @param len Length of src array.
+ */
+static void GdbHexToMem(u8* dest, u8* src, u32 len) {
+ while (len-- > 0) {
+ *dest++ = (HexCharToValue(src[0]) << 4) | HexCharToValue(src[1]);
+ src += 2;
+ }
+}
+
+/**
+ * Convert a u32 into a gdb-formatted hex string.
+ *
+ * @param dest Pointer to buffer to store output hex string characters.
+ */
+static void IntToGdbHex(u8* dest, u32 v) {
+ for (int i = 0; i < 8; i += 2) {
+ dest[i + 1] = NibbleToHex(v >> (4 * i));
+ dest[i] = NibbleToHex(v >> (4 * (i + 1)));
+ }
+}
+
+/**
+ * Convert a gdb-formatted hex string into a u32.
+ *
+ * @param src Pointer to hex string.
+ */
+static u32 GdbHexToInt(u8* src) {
+ u32 output = 0;
+
+ for (int i = 0; i < 8; i += 2) {
+ output = (output << 4) | HexCharToValue(src[7 - i - 1]);
+ output = (output << 4) | HexCharToValue(src[7 - i]);
+ }
+
+ return output;
+}
+
+/// Read a byte from the gdb client.
+static u8 ReadByte() {
+ u8 c;
+ size_t received_size = recv(gdbserver_socket, reinterpret_cast<char*>(&c), 1, MSG_WAITALL);
+ if (received_size != 1) {
+ LOG_ERROR(Debug_GDBStub, "recv failed : %ld", received_size);
+ Shutdown();
+ }
+
+ return c;
+}
+
+/// Calculate the checksum of the current command buffer.
+static u8 CalculateChecksum(u8 *buffer, u32 length) {
+ return static_cast<u8>(std::accumulate(buffer, buffer + length, 0, std::plus<u8>()));
+}
+
+/**
+ * Get the list of breakpoints for a given breakpoint type.
+ *
+ * @param type Type of breakpoint list.
+ */
+static std::map<u32, Breakpoint>& GetBreakpointList(BreakpointType type) {
+ switch (type) {
+ case BreakpointType::Execute:
+ return breakpoints_execute;
+ case BreakpointType::Read:
+ return breakpoints_read;
+ case BreakpointType::Write:
+ return breakpoints_write;
+ default:
+ return breakpoints_read;
+ }
+}
+
+/**
+ * Remove the breakpoint from the given address of the specified type.
+ *
+ * @param type Type of breakpoint.
+ * @param addr Address of breakpoint.
+ */
+static void RemoveBreakpoint(BreakpointType type, PAddr addr) {
+ std::map<u32, Breakpoint>& p = GetBreakpointList(type);
+
+ auto bp = p.find(addr);
+ if (bp != p.end()) {
+ LOG_DEBUG(Debug_GDBStub, "gdb: removed a breakpoint: %08x bytes at %08x of type %d\n", bp->second.len, bp->second.addr, type);
+ p.erase(addr);
+ }
+}
+
+BreakpointAddress GetNextBreakpointFromAddress(PAddr addr, BreakpointType type) {
+ std::map<u32, Breakpoint>& p = GetBreakpointList(type);
+ auto next_breakpoint = p.lower_bound(addr);
+ BreakpointAddress breakpoint;
+
+ if (next_breakpoint != p.end()) {
+ breakpoint.address = next_breakpoint->first;
+ breakpoint.type = type;
+ } else {
+ breakpoint.address = 0;
+ breakpoint.type = BreakpointType::None;
+ }
+
+ return breakpoint;
+}
+
+bool CheckBreakpoint(PAddr addr, BreakpointType type) {
+ if (!IsConnected()) {
+ return false;
+ }
+
+ std::map<u32, Breakpoint>& p = GetBreakpointList(type);
+
+ auto bp = p.find(addr);
+ if (bp != p.end()) {
+ u32 len = bp->second.len;
+
+ // IDA Pro defaults to 4-byte breakpoints for all non-hardware breakpoints
+ // no matter if it's a 4-byte or 2-byte instruction. When you execute a
+ // Thumb instruction with a 4-byte breakpoint set, it will set a breakpoint on
+ // two instructions instead of the single instruction you placed the breakpoint
+ // on. So, as a way to make sure that execution breakpoints are only breaking
+ // on the instruction that was specified, set the length of an execution
+ // breakpoint to 1. This should be fine since the CPU should never begin executing
+ // an instruction anywhere except the beginning of the instruction.
+ if (type == BreakpointType::Execute) {
+ len = 1;
+ }
+
+ if (bp->second.active && (addr >= bp->second.addr && addr < bp->second.addr + len)) {
+ LOG_DEBUG(Debug_GDBStub, "Found breakpoint type %d @ %08x, range: %08x - %08x (%d bytes)\n", type, addr, bp->second.addr, bp->second.addr + len, len);
+ return true;
+ }
+ }
+
+ return false;
+}
+
+/**
+ * Send packet to gdb client.
+ *
+ * @param packet Packet to be sent to client.
+ */
+static void SendPacket(const char packet) {
+ size_t sent_size = send(gdbserver_socket, &packet, 1, 0);
+ if (sent_size != 1) {
+ LOG_ERROR(Debug_GDBStub, "send failed");
+ }
+}
+
+/**
+ * Send reply to gdb client.
+ *
+ * @param reply Reply to be sent to client.
+ */
+static void SendReply(const char* reply) {
+ if (!IsConnected()) {
+ return;
+ }
+
+ memset(command_buffer, 0, sizeof(command_buffer));
+
+ command_length = strlen(reply);
+ if (command_length + 4 > sizeof(command_buffer)) {
+ LOG_ERROR(Debug_GDBStub, "command_buffer overflow in SendReply");
+ return;
+ }
+
+ memcpy(command_buffer + 1, reply, command_length);
+
+ u8 checksum = CalculateChecksum(command_buffer, command_length + 1);
+ command_buffer[0] = GDB_STUB_START;
+ command_buffer[command_length + 1] = GDB_STUB_END;
+ command_buffer[command_length + 2] = NibbleToHex(checksum >> 4);
+ command_buffer[command_length + 3] = NibbleToHex(checksum);
+
+ u8* ptr = command_buffer;
+ u32 left = command_length + 4;
+ while (left > 0) {
+ int sent_size = send(gdbserver_socket, reinterpret_cast<char*>(ptr), left, 0);
+ if (sent_size < 0) {
+ LOG_ERROR(Debug_GDBStub, "gdb: send failed");
+ return Shutdown();
+ }
+
+ left -= sent_size;
+ ptr += sent_size;
+ }
+}
+
+/// Handle query command from gdb client.
+static void HandleQuery() {
+ LOG_DEBUG(Debug_GDBStub, "gdb: query '%s'\n", command_buffer + 1);
+
+ if (!strcmp(reinterpret_cast<const char*>(command_buffer + 1), "TStatus")) {
+ SendReply("T0");
+ } else {
+ SendReply("");
+ }
+}
+
+/// 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");
+ }
+
+ SendReply("E01");
+}
+
+/**
+ * Send signal packet to client.
+ *
+ * @param signal Signal to be sent to client.
+ */
+void SendSignal(u32 signal) {
+ if (gdbserver_socket == -1) {
+ return;
+ }
+
+ latest_signal = signal;
+
+ std::string buffer = Common::StringFromFormat("T%02x%02x:%08x;%02x:%08x;", latest_signal, 15, htonl(Core::g_app_core->GetPC()), 13, htonl(Core::g_app_core->GetReg(13)));
+ LOG_DEBUG(Debug_GDBStub, "Response: %s", buffer.c_str());
+ SendReply(buffer.c_str());
+}
+
+/// Read command from gdb client.
+static void ReadCommand() {
+ command_length = 0;
+ memset(command_buffer, 0, sizeof(command_buffer));
+
+ u8 c = ReadByte();
+ if (c == '+') {
+ //ignore ack
+ return;
+ } else if (c == 0x03) {
+ LOG_INFO(Debug_GDBStub, "gdb: found break command\n");
+ halt_loop = true;
+ SendSignal(SIGTRAP);
+ return;
+ } else if (c != GDB_STUB_START) {
+ LOG_DEBUG(Debug_GDBStub, "gdb: read invalid byte %02x\n", c);
+ return;
+ }
+
+ while ((c = ReadByte()) != GDB_STUB_END) {
+ if (command_length >= sizeof(command_buffer)) {
+ LOG_ERROR(Debug_GDBStub, "gdb: command_buffer overflow\n");
+ SendPacket(GDB_STUB_NACK);
+ return;
+ }
+ command_buffer[command_length++] = c;
+ }
+
+ u8 checksum_received = HexCharToValue(ReadByte()) << 4;
+ checksum_received |= HexCharToValue(ReadByte());
+
+ u8 checksum_calculated = CalculateChecksum(command_buffer, command_length);
+
+ if (checksum_received != checksum_calculated) {
+ LOG_ERROR(Debug_GDBStub, "gdb: invalid checksum: calculated %02x and read %02x for $%s# (length: %d)\n",
+ checksum_calculated, checksum_received, command_buffer, command_length);
+
+ command_length = 0;
+
+ SendPacket(GDB_STUB_NACK);
+ return;
+ }
+
+ SendPacket(GDB_STUB_ACK);
+}
+
+/// Check if there is data to be read from the gdb client.
+static bool IsDataAvailable() {
+ if (!IsConnected()) {
+ return false;
+ }
+
+ fd_set fd_socket;
+
+ FD_ZERO(&fd_socket);
+ FD_SET(gdbserver_socket, &fd_socket);
+
+ struct timeval t;
+ t.tv_sec = 0;
+ t.tv_usec = 0;
+
+ if (select(gdbserver_socket + 1, &fd_socket, nullptr, nullptr, &t) < 0) {
+ LOG_ERROR(Debug_GDBStub, "select failed");
+ return false;
+ }
+
+ return FD_ISSET(gdbserver_socket, &fd_socket);
+}
+
+/// Send requested register to gdb client.
+static void ReadRegister() {
+ static u8 reply[64];
+ memset(reply, 0, sizeof(reply));
+
+ u32 id = HexCharToValue(command_buffer[1]);
+ if (command_buffer[2] != '\0') {
+ id <<= 4;
+ id |= HexCharToValue(command_buffer[2]);
+ }
+
+ if (id >= R0_REGISTER && id <= R15_REGISTER) {
+ IntToGdbHex(reply, Core::g_app_core->GetReg(id));
+ } else if (id == CSPR_REGISTER) {
+ IntToGdbHex(reply, Core::g_app_core->GetCPSR());
+ } else if (id > CSPR_REGISTER && id < FPSCR_REGISTER) {
+ IntToGdbHex(reply, Core::g_app_core->GetVFPReg(id - CSPR_REGISTER - 1)); // VFP registers should start at 26, so one after CSPR_REGISTER
+ } else if (id == FPSCR_REGISTER) {
+ IntToGdbHex(reply, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR)); // Get FPSCR
+ IntToGdbHex(reply + 8, 0);
+ } else {
+ return SendReply("E01");
+ }
+
+ SendReply(reinterpret_cast<char*>(reply));
+}
+
+/// Send all registers to the gdb client.
+static void ReadRegisters() {
+ static u8 buffer[GDB_BUFFER_SIZE - 4];
+ memset(buffer, 0, sizeof(buffer));
+
+ u8* bufptr = buffer;
+ for (int i = 0, reg = 0; i <= MAX_REGISTERS; i++, reg++) {
+ if (i <= R15_REGISTER) {
+ IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetReg(reg));
+ } else if (i == CSPR_REGISTER) {
+ IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetCPSR());
+ } else if (i < CSPR_REGISTER) {
+ IntToGdbHex(bufptr + i * CHAR_BIT, 0);
+ IntToGdbHex(bufptr + (i + 1) * CHAR_BIT, 0);
+ i++; // These registers seem to be all 64bit instead of 32bit, so skip two instead of one
+ reg++;
+ } else if (i > CSPR_REGISTER && i < MAX_REGISTERS) {
+ IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetVFPReg(reg - CSPR_REGISTER - 1));
+ IntToGdbHex(bufptr + (i + 1) * CHAR_BIT, 0);
+ i++;
+ } else if (i == MAX_REGISTERS) {
+ IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR));
+ }
+ }
+
+ SendReply(reinterpret_cast<char*>(buffer));
+}
+
+/// Modify data of register specified by gdb client.
+static void WriteRegister() {
+ u8* buffer_ptr = command_buffer + 3;
+
+ u32 id = HexCharToValue(command_buffer[1]);
+ if (command_buffer[2] != '=') {
+ ++buffer_ptr;
+ id <<= 4;
+ id |= HexCharToValue(command_buffer[2]);
+ }
+
+ if (id >= R0_REGISTER && id <= R15_REGISTER) {
+ Core::g_app_core->SetReg(id, GdbHexToInt(buffer_ptr));
+ } else if (id == CSPR_REGISTER) {
+ Core::g_app_core->SetCPSR(GdbHexToInt(buffer_ptr));
+ } else if (id > CSPR_REGISTER && id < FPSCR_REGISTER) {
+ Core::g_app_core->SetVFPReg(id - CSPR_REGISTER - 1, GdbHexToInt(buffer_ptr));
+ } else if (id == FPSCR_REGISTER) {
+ Core::g_app_core->SetVFPSystemReg(VFP_FPSCR, GdbHexToInt(buffer_ptr));
+ } else {
+ return SendReply("E01");
+ }
+
+ SendReply("OK");
+}
+
+/// Modify all registers with data received from the client.
+static void WriteRegisters() {
+ u8* buffer_ptr = command_buffer + 1;
+
+ if (command_buffer[0] != 'G')
+ return SendReply("E01");
+
+ for (int i = 0, reg = 0; i <= MAX_REGISTERS; i++, reg++) {
+ if (i <= R15_REGISTER) {
+ Core::g_app_core->SetReg(reg, GdbHexToInt(buffer_ptr + i * CHAR_BIT));
+ } else if (i == CSPR_REGISTER) {
+ Core::g_app_core->SetCPSR(GdbHexToInt(buffer_ptr + i * CHAR_BIT));
+ } else if (i < CSPR_REGISTER) {
+ i++; // These registers seem to be all 64bit instead of 32bit, so skip two instead of one
+ reg++;
+ } else if (i > CSPR_REGISTER && i < MAX_REGISTERS) {
+ Core::g_app_core->SetVFPReg(reg - CSPR_REGISTER - 1, GdbHexToInt(buffer_ptr + i * CHAR_BIT));
+ i++; // Skip padding
+ } else if (i == MAX_REGISTERS) {
+ Core::g_app_core->SetVFPSystemReg(VFP_FPSCR, GdbHexToInt(buffer_ptr + i * CHAR_BIT));
+ }
+ }
+
+ SendReply("OK");
+}
+
+/// Read location in memory specified by gdb client.
+static void ReadMemory() {
+ static u8 reply[GDB_BUFFER_SIZE - 4];
+
+ auto start_offset = command_buffer+1;
+ auto addr_pos = std::find(start_offset, command_buffer+command_length, ',');
+ PAddr addr = HexToInt(start_offset, addr_pos - start_offset);
+
+ start_offset = addr_pos+1;
+ u32 len = HexToInt(start_offset, (command_buffer + command_length) - start_offset);
+
+ LOG_DEBUG(Debug_GDBStub, "gdb: addr: %08x len: %08x\n", addr, len);
+
+ if (len * 2 > sizeof(reply)) {
+ SendReply("E01");
+ }
+
+ u8* data = Memory::GetPointer(addr);
+ if (!data) {
+ return SendReply("E0");
+ }
+
+ MemToGdbHex(reply, data, len);
+ reply[len * 2] = '\0';
+ SendReply(reinterpret_cast<char*>(reply));
+}
+
+/// Modify location in memory with data received from the gdb client.
+static void WriteMemory() {
+ auto start_offset = command_buffer+1;
+ auto addr_pos = std::find(start_offset, command_buffer+command_length, ',');
+ PAddr addr = HexToInt(start_offset, addr_pos - start_offset);
+
+ start_offset = addr_pos+1;
+ auto len_pos = std::find(start_offset, command_buffer+command_length, ':');
+ u32 len = HexToInt(start_offset, len_pos - start_offset);
+
+ u8* dst = Memory::GetPointer(addr);
+ if (!dst) {
+ return SendReply("E00");
+ }
+
+ GdbHexToMem(dst, len_pos + 1, len);
+ SendReply("OK");
+}
+
+void Break(bool is_memory_break) {
+ if (!halt_loop) {
+ halt_loop = true;
+ SendSignal(SIGTRAP);
+ }
+
+ memory_break = is_memory_break;
+}
+
+/// Tell the CPU that it should perform a single step.
+static void Step() {
+ step_loop = true;
+ halt_loop = true;
+ step_break = true;
+ SendSignal(SIGTRAP);
+}
+
+bool IsMemoryBreak() {
+ if (IsConnected()) {
+ return false;
+ }
+
+ return memory_break;
+}
+
+/// Tell the CPU to continue executing.
+static void Continue() {
+ memory_break = false;
+ step_break = false;
+ step_loop = false;
+ halt_loop = false;
+}
+
+/**
+ * Commit breakpoint to list of breakpoints.
+ *
+ * @param type Type of breakpoint.
+ * @param addr Address of breakpoint.
+ * @param len Length of breakpoint.
+ */
+bool CommitBreakpoint(BreakpointType type, PAddr addr, u32 len) {
+ std::map<u32, Breakpoint>& p = GetBreakpointList(type);
+
+ Breakpoint breakpoint;
+ breakpoint.active = true;
+ breakpoint.addr = addr;
+ breakpoint.len = len;
+ p.insert({ addr, breakpoint });
+
+ LOG_DEBUG(Debug_GDBStub, "gdb: added %d breakpoint: %08x bytes at %08x\n", type, breakpoint.len, breakpoint.addr);
+
+ return true;
+}
+
+/// Handle add breakpoint command from gdb client.
+static void AddBreakpoint() {
+ BreakpointType type;
+
+ u8 type_id = HexCharToValue(command_buffer[1]);
+ switch (type_id) {
+ case 0:
+ case 1:
+ type = BreakpointType::Execute;
+ break;
+ case 2:
+ type = BreakpointType::Write;
+ break;
+ case 3:
+ type = BreakpointType::Read;
+ break;
+ case 4:
+ type = BreakpointType::Access;
+ break;
+ default:
+ return SendReply("E01");
+ }
+
+ auto start_offset = command_buffer+3;
+ auto addr_pos = std::find(start_offset, command_buffer+command_length, ',');
+ PAddr addr = HexToInt(start_offset, addr_pos - start_offset);
+
+ start_offset = addr_pos+1;
+ u32 len = HexToInt(start_offset, (command_buffer + command_length) - start_offset);
+
+ if (type == BreakpointType::Access) {
+ // Access is made up of Read and Write types, so add both breakpoints
+ type = BreakpointType::Read;
+
+ if (!CommitBreakpoint(type, addr, len)) {
+ return SendReply("E02");
+ }
+
+ type = BreakpointType::Write;
+ }
+
+ if (!CommitBreakpoint(type, addr, len)) {
+ return SendReply("E02");
+ }
+
+ SendReply("OK");
+}
+
+/// Handle remove breakpoint command from gdb client.
+static void RemoveBreakpoint() {
+ BreakpointType type;
+
+ u8 type_id = HexCharToValue(command_buffer[1]);
+ switch (type_id) {
+ case 0:
+ case 1:
+ type = BreakpointType::Execute;
+ break;
+ case 2:
+ type = BreakpointType::Write;
+ break;
+ case 3:
+ type = BreakpointType::Read;
+ break;
+ case 4:
+ type = BreakpointType::Access;
+ break;
+ default:
+ return SendReply("E01");
+ }
+
+ auto start_offset = command_buffer+3;
+ auto addr_pos = std::find(start_offset, command_buffer+command_length, ',');
+ PAddr addr = HexToInt(start_offset, addr_pos - start_offset);
+
+ start_offset = addr_pos+1;
+ u32 len = HexToInt(start_offset, (command_buffer + command_length) - start_offset);
+
+ if (type == BreakpointType::Access) {
+ // Access is made up of Read and Write types, so add both breakpoints
+ type = BreakpointType::Read;
+ RemoveBreakpoint(type, addr);
+
+ type = BreakpointType::Write;
+ }
+
+ RemoveBreakpoint(type, addr);
+ SendReply("OK");
+}
+
+void HandlePacket() {
+ if (!IsConnected()) {
+ return;
+ }
+
+ if (!IsDataAvailable()) {
+ return;
+ }
+
+ ReadCommand();
+ if (command_length == 0) {
+ return;
+ }
+
+ LOG_DEBUG(Debug_GDBStub, "Packet: %s", command_buffer);
+
+ switch (command_buffer[0]) {
+ case 'q':
+ HandleQuery();
+ break;
+ case 'H':
+ HandleSetThread();
+ break;
+ case '?':
+ SendSignal(latest_signal);
+ break;
+ case 'k':
+ Shutdown();
+ LOG_INFO(Debug_GDBStub, "killed by gdb");
+ return;
+ case 'g':
+ ReadRegisters();
+ break;
+ case 'G':
+ WriteRegisters();
+ break;
+ case 'p':
+ ReadRegister();
+ break;
+ case 'P':
+ WriteRegister();
+ break;
+ case 'm':
+ ReadMemory();
+ break;
+ case 'M':
+ WriteMemory();
+ break;
+ case 's':
+ Step();
+ return;
+ case 'C':
+ case 'c':
+ Continue();
+ return;
+ case 'z':
+ RemoveBreakpoint();
+ break;
+ case 'Z':
+ AddBreakpoint();
+ break;
+ default:
+ SendReply("");
+ break;
+ }
+}
+
+void SetServerPort(u16 port) {
+ gdbstub_port = port;
+}
+
+void ToggleServer(bool status) {
+ if (status) {
+ g_server_enabled = status;
+
+ // Start server
+ if (!IsConnected() && Core::g_sys_core != nullptr) {
+ Init();
+ }
+ }
+ else {
+ // Stop server
+ if (IsConnected()) {
+ Shutdown();
+ }
+
+ g_server_enabled = status;
+ }
+}
+
+void Init(u16 port) {
+ if (!g_server_enabled) {
+ // Set the halt loop to false in case the user enabled the gdbstub mid-execution.
+ // This way the CPU can still execute normally.
+ halt_loop = false;
+ step_loop = false;
+ return;
+ }
+
+ // Setup initial gdbstub status
+ halt_loop = true;
+ step_loop = false;
+
+ breakpoints_execute.clear();
+ breakpoints_read.clear();
+ breakpoints_write.clear();
+
+ // Start gdb server
+ LOG_INFO(Debug_GDBStub, "Starting GDB server on port %d...", port);
+
+ sockaddr_in saddr_server = {};
+ saddr_server.sin_family = AF_INET;
+ saddr_server.sin_port = htons(port);
+ saddr_server.sin_addr.s_addr = INADDR_ANY;
+
+#ifdef _WIN32
+ WSAStartup(MAKEWORD(2, 2), &InitData);
+#endif
+
+ int tmpsock = socket(PF_INET, SOCK_STREAM, 0);
+ if (tmpsock == -1) {
+ LOG_ERROR(Debug_GDBStub, "Failed to create gdb socket");
+ }
+
+ 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) {
+ LOG_ERROR(Debug_GDBStub, "Failed to bind gdb socket");
+ }
+
+ if (listen(tmpsock, 1) < 0) {
+ LOG_ERROR(Debug_GDBStub, "Failed to listen to gdb socket");
+ }
+
+ // Wait for gdb to connect
+ LOG_INFO(Debug_GDBStub, "Waiting for gdb to connect...\n");
+ sockaddr_in saddr_client;
+ sockaddr* client_addr = reinterpret_cast<sockaddr*>(&saddr_client);
+ socklen_t client_addrlen = sizeof(saddr_client);
+ gdbserver_socket = accept(tmpsock, client_addr, &client_addrlen);
+ if (gdbserver_socket < 0) {
+ // In the case that we couldn't start the server for whatever reason, just start CPU execution like normal.
+ halt_loop = false;
+ step_loop = false;
+
+ LOG_ERROR(Debug_GDBStub, "Failed to accept gdb client");
+ }
+ else {
+ LOG_INFO(Debug_GDBStub, "Client connected.\n");
+ saddr_client.sin_addr.s_addr = ntohl(saddr_client.sin_addr.s_addr);
+ }
+
+ // Clean up temporary socket if it's still alive at this point.
+ if (tmpsock != -1) {
+ shutdown(tmpsock, SHUT_RDWR);
+ }
+}
+
+void Init() {
+ Init(gdbstub_port);
+}
+
+void Shutdown() {
+ if (!g_server_enabled) {
+ return;
+ }
+
+ LOG_INFO(Debug_GDBStub, "Stopping GDB ...");
+ if (gdbserver_socket != -1) {
+ shutdown(gdbserver_socket, SHUT_RDWR);
+ gdbserver_socket = -1;
+ }
+
+#ifdef _WIN32
+ WSACleanup();
+#endif
+
+ LOG_INFO(Debug_GDBStub, "GDB stopped.");
+}
+
+bool IsConnected() {
+ return g_server_enabled && gdbserver_socket != -1;
+}
+
+bool GetCpuHaltFlag() {
+ return halt_loop;
+}
+
+bool GetCpuStepFlag() {
+ return step_loop;
+}
+
+void SetCpuStepFlag(bool is_step) {
+ step_loop = is_step;
+}
+
+};
diff --git a/src/core/gdbstub/gdbstub.h b/src/core/gdbstub/gdbstub.h
new file mode 100644
index 000000000..aff705a32
--- /dev/null
+++ b/src/core/gdbstub/gdbstub.h
@@ -0,0 +1,94 @@
+// Copyright 2013 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+// Originally written by Sven Peter <sven@fail0verflow.com> for anergistic.
+
+#pragma once
+#include <atomic>
+
+namespace GDBStub {
+
+/// Breakpoint Method
+enum class BreakpointType {
+ None, ///< None
+ Execute, ///< Execution Breakpoint
+ Read, ///< Read Breakpoint
+ Write, ///< Write Breakpoint
+ Access ///< Access (R/W) Breakpoint
+};
+
+struct BreakpointAddress {
+ PAddr address;
+ BreakpointType type;
+};
+
+/// If set to false, the server will never be started and no gdbstub-related functions will be executed.
+extern std::atomic<bool> g_server_enabled;
+
+/**
+ * Set the port the gdbstub should use to listen for connections.
+ *
+ * @param port Port to listen for connection
+ */
+void SetServerPort(u16 port);
+
+/**
+ * Set the g_server_enabled flag and start or stop the server if possible.
+ *
+ * @param status Set the server to enabled or disabled.
+ */
+void ToggleServer(bool status);
+
+/// Start the gdbstub server.
+void Init();
+
+/// Stop gdbstub server.
+void Shutdown();
+
+/// Returns true if there is an active socket connection.
+bool IsConnected();
+
+/**
+ * Signal to the gdbstub server that it should halt CPU execution.
+ *
+ * @param is_memory_break If true, the break resulted from a memory breakpoint.
+ */
+void Break(bool is_memory_break = false);
+
+/// Determine if there was a memory breakpoint.
+bool IsMemoryBreak();
+
+/// Read and handle packet from gdb client.
+void HandlePacket();
+
+/**
+ * Get the nearest breakpoint of the specified type at the given address.
+ *
+ * @param addr Address to search from.
+ * @param type Type of breakpoint.
+ */
+BreakpointAddress GetNextBreakpointFromAddress(u32 addr, GDBStub::BreakpointType type);
+
+/**
+ * Check if a breakpoint of the specified type exists at the given address.
+ *
+ * @param addr Address of breakpoint.
+ * @param type Type of breakpoint.
+ */
+bool CheckBreakpoint(u32 addr, GDBStub::BreakpointType type);
+
+// If set to true, the CPU will halt at the beginning of the next CPU loop.
+bool GetCpuHaltFlag();
+
+// If set to true and the CPU is halted, the CPU will step one instruction.
+bool GetCpuStepFlag();
+
+/**
+ * When set to true, the CPU will step one instruction when the CPU is halted next.
+ *
+ * @param is_step
+ */
+void SetCpuStepFlag(bool is_step);
+
+}
diff --git a/src/core/settings.h b/src/core/settings.h
index 0b05e5bee..97ddcdff9 100644
--- a/src/core/settings.h
+++ b/src/core/settings.h
@@ -6,6 +6,7 @@
#include <string>
#include <array>
+#include <common/file_util.h>
namespace Settings {
@@ -60,6 +61,10 @@ struct Values {
float bg_blue;
std::string log_filter;
+
+ // Debugging
+ bool use_gdbstub;
+ u16 gdbstub_port;
} extern values;
}
diff --git a/src/core/system.cpp b/src/core/system.cpp
index 3cd84bf5e..7e9c56538 100644
--- a/src/core/system.cpp
+++ b/src/core/system.cpp
@@ -12,6 +12,8 @@
#include "video_core/video_core.h"
+#include "core/gdbstub/gdbstub.h"
+
namespace System {
void Init(EmuWindow* emu_window) {
@@ -22,9 +24,11 @@ void Init(EmuWindow* emu_window) {
Kernel::Init();
HLE::Init();
VideoCore::Init(emu_window);
+ GDBStub::Init();
}
void Shutdown() {
+ GDBStub::Shutdown();
VideoCore::Shutdown();
HLE::Shutdown();
Kernel::Shutdown();
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 02:55:24 +0100