diff options
| -rw-r--r-- | src/core/arm/unicorn/arm_unicorn.cpp | 38 | ||||
| -rw-r--r-- | src/core/arm/unicorn/arm_unicorn.h | 4 | ||||
| -rw-r--r-- | src/core/gdbstub/gdbstub.cpp | 170 | ||||
| -rw-r--r-- | src/core/gdbstub/gdbstub.h | 9 |
4 files changed, 194 insertions, 27 deletions
diff --git a/src/core/arm/unicorn/arm_unicorn.cpp b/src/core/arm/unicorn/arm_unicorn.cpp index c0cc62f03..ce6c5616d 100644 --- a/src/core/arm/unicorn/arm_unicorn.cpp +++ b/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; +} diff --git a/src/core/arm/unicorn/arm_unicorn.h b/src/core/arm/unicorn/arm_unicorn.h index b99b58e4c..a482a2aa3 100644 --- a/src/core/arm/unicorn/arm_unicorn.h +++ b/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; }; diff --git a/src/core/gdbstub/gdbstub.cpp b/src/core/gdbstub/gdbstub.cpp index 6c5a40ba8..2603192fe 100644 --- a/src/core/gdbstub/gdbstub.cpp +++ b/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. * @@ -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 diff --git a/src/core/gdbstub/gdbstub.h b/src/core/gdbstub/gdbstub.h index 201fca095..f2418c9e4 100644 --- a/src/core/gdbstub/gdbstub.h +++ b/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 |