GDB Stub Improvements (#508)
* GDB Stub should work now. * Applied clang-format. * Replaced htonll with swap64. * Tidy up.
This commit is contained in:
Hedges
bunnei
parent
5fb99e6a16
commit
39fb3e362c
4 changed files with 194 additions and 27 deletions
|
|
@ -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;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
};
|
||||
|
|
|
|||
|
|
@ -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.
|
||||
*
|
||||
|
|
@ -193,7 +246,7 @@ static u8 NibbleToHex(u8 n) {
|
|||
if (n < 0xA) {
|
||||
return '0' + n;
|
||||
} else {
|
||||
return 'A' + n - 0xA;
|
||||
return 'a' + n - 0xA;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -439,6 +492,8 @@ static void SendReply(const char* reply) {
|
|||
return;
|
||||
}
|
||||
|
||||
NGLOG_DEBUG(Debug_GDBStub, "Reply: {}", reply);
|
||||
|
||||
memset(command_buffer, 0, sizeof(command_buffer));
|
||||
|
||||
command_length = static_cast<u32>(strlen(reply));
|
||||
|
|
@ -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());
|
||||
}
|
||||
|
||||
|
|
@ -527,7 +636,7 @@ static void ReadCommand() {
|
|||
} else if (c == 0x03) {
|
||||
NGLOG_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);
|
||||
|
|
@ -598,11 +707,11 @@ 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 +727,16 @@ 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 +755,11 @@ 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 +776,11 @@ 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();
|
||||
}
|
||||
|
|
@ -734,7 +843,7 @@ 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 +853,10 @@ 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 +868,6 @@ bool IsMemoryBreak() {
|
|||
/// Tell the CPU to continue executing.
|
||||
static void Continue() {
|
||||
memory_break = false;
|
||||
step_break = false;
|
||||
step_loop = false;
|
||||
halt_loop = false;
|
||||
}
|
||||
|
|
@ -898,7 +1006,7 @@ void HandlePacket() {
|
|||
HandleSetThread();
|
||||
break;
|
||||
case '?':
|
||||
SendSignal(latest_signal);
|
||||
SendSignal(current_thread, latest_signal);
|
||||
break;
|
||||
case 'k':
|
||||
Shutdown();
|
||||
|
|
@ -935,6 +1043,9 @@ void HandlePacket() {
|
|||
case 'Z':
|
||||
AddBreakpoint();
|
||||
break;
|
||||
case 'T':
|
||||
HandleThreadAlive();
|
||||
break;
|
||||
default:
|
||||
SendReply("");
|
||||
break;
|
||||
|
|
@ -1079,4 +1190,11 @@ 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
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
Loading…
Reference in a new issue