summaryrefslogtreecommitdiffstats
path: root/src/core/gdbstub
diff options
context:
space:
mode:
Diffstat (limited to 'src/core/gdbstub')
-rw-r--r--src/core/gdbstub/gdbstub.cpp1397
-rw-r--r--src/core/gdbstub/gdbstub.h114
2 files changed, 0 insertions, 1511 deletions
diff --git a/src/core/gdbstub/gdbstub.cpp b/src/core/gdbstub/gdbstub.cpp
deleted file mode 100644
index 79f22a403..000000000
--- a/src/core/gdbstub/gdbstub.cpp
+++ /dev/null
@@ -1,1397 +0,0 @@
-// 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 <atomic>
-#include <climits>
-#include <csignal>
-#include <cstdarg>
-#include <cstdio>
-#include <cstring>
-#include <map>
-#include <numeric>
-#include <fcntl.h>
-
-#ifdef _WIN32
-#include <winsock2.h>
-// winsock2.h needs to be included first to prevent winsock.h being included by other includes
-#include <io.h>
-#include <iphlpapi.h>
-#include <ws2tcpip.h>
-#define SHUT_RDWR 2
-#else
-#include <netinet/in.h>
-#include <sys/select.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <unistd.h>
-#endif
-
-#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/gdbstub/gdbstub.h"
-#include "core/hle/kernel/memory/page_table.h"
-#include "core/hle/kernel/process.h"
-#include "core/hle/kernel/scheduler.h"
-#include "core/loader/loader.h"
-#include "core/memory.h"
-
-namespace GDBStub {
-namespace {
-constexpr int GDB_BUFFER_SIZE = 10000;
-
-constexpr char GDB_STUB_START = '$';
-constexpr char GDB_STUB_END = '#';
-constexpr char GDB_STUB_ACK = '+';
-constexpr char GDB_STUB_NACK = '-';
-
-#ifndef SIGTRAP
-constexpr u32 SIGTRAP = 5;
-#endif
-
-#ifndef SIGTERM
-constexpr u32 SIGTERM = 15;
-#endif
-
-#ifndef MSG_WAITALL
-constexpr u32 MSG_WAITALL = 8;
-#endif
-
-constexpr u32 LR_REGISTER = 30;
-constexpr u32 SP_REGISTER = 31;
-constexpr u32 PC_REGISTER = 32;
-constexpr u32 PSTATE_REGISTER = 33;
-constexpr u32 UC_ARM64_REG_Q0 = 34;
-constexpr u32 FPCR_REGISTER = 66;
-
-// For sample XML files see the GDB source /gdb/features
-// GDB also wants the l character at the start
-// This XML defines what the registers are for this specific ARM device
-constexpr char target_xml[] =
- R"(l<?xml version="1.0"?>
-<!DOCTYPE target SYSTEM "gdb-target.dtd">
-<target version="1.0">
- <feature name="org.gnu.gdb.aarch64.core">
- <reg name="x0" bitsize="64"/>
- <reg name="x1" bitsize="64"/>
- <reg name="x2" bitsize="64"/>
- <reg name="x3" bitsize="64"/>
- <reg name="x4" bitsize="64"/>
- <reg name="x5" bitsize="64"/>
- <reg name="x6" bitsize="64"/>
- <reg name="x7" bitsize="64"/>
- <reg name="x8" bitsize="64"/>
- <reg name="x9" bitsize="64"/>
- <reg name="x10" bitsize="64"/>
- <reg name="x11" bitsize="64"/>
- <reg name="x12" bitsize="64"/>
- <reg name="x13" bitsize="64"/>
- <reg name="x14" bitsize="64"/>
- <reg name="x15" bitsize="64"/>
- <reg name="x16" bitsize="64"/>
- <reg name="x17" bitsize="64"/>
- <reg name="x18" bitsize="64"/>
- <reg name="x19" bitsize="64"/>
- <reg name="x20" bitsize="64"/>
- <reg name="x21" bitsize="64"/>
- <reg name="x22" bitsize="64"/>
- <reg name="x23" bitsize="64"/>
- <reg name="x24" bitsize="64"/>
- <reg name="x25" bitsize="64"/>
- <reg name="x26" bitsize="64"/>
- <reg name="x27" bitsize="64"/>
- <reg name="x28" bitsize="64"/>
- <reg name="x29" bitsize="64"/>
- <reg name="x30" bitsize="64"/>
- <reg name="sp" bitsize="64" type="data_ptr"/>
-
- <reg name="pc" bitsize="64" type="code_ptr"/>
-
- <flags id="pstate_flags" size="4">
- <field name="SP" start="0" end="0"/>
- <field name="" start="1" end="1"/>
- <field name="EL" start="2" end="3"/>
- <field name="nRW" start="4" end="4"/>
- <field name="" start="5" end="5"/>
- <field name="F" start="6" end="6"/>
- <field name="I" start="7" end="7"/>
- <field name="A" start="8" end="8"/>
- <field name="D" start="9" end="9"/>
-
- <field name="IL" start="20" end="20"/>
- <field name="SS" start="21" end="21"/>
-
- <field name="V" start="28" end="28"/>
- <field name="C" start="29" end="29"/>
- <field name="Z" start="30" end="30"/>
- <field name="N" start="31" end="31"/>
- </flags>
- <reg name="pstate" bitsize="32" type="pstate_flags"/>
- </feature>
- <feature name="org.gnu.gdb.aarch64.fpu">
- </feature>
-</target>
-)";
-
-int gdbserver_socket = -1;
-bool defer_start = false;
-
-u8 command_buffer[GDB_BUFFER_SIZE];
-u32 command_length;
-
-u32 latest_signal = 0;
-bool memory_break = false;
-
-Kernel::Thread* current_thread = nullptr;
-u32 current_core = 0;
-
-// Binding to a port within the reserved ports range (0-1023) requires root permissions,
-// so default to a port outside of that range.
-u16 gdbstub_port = 24689;
-
-bool halt_loop = true;
-bool step_loop = false;
-bool send_trap = false;
-
-// If set to false, the server will never be started and no
-// gdbstub-related functions will be executed.
-std::atomic<bool> server_enabled(false);
-
-#ifdef _WIN32
-WSADATA InitData;
-#endif
-
-struct Breakpoint {
- bool active;
- VAddr addr;
- u64 len;
- std::array<u8, 4> inst;
-};
-
-using BreakpointMap = std::map<VAddr, Breakpoint>;
-BreakpointMap breakpoints_execute;
-BreakpointMap breakpoints_read;
-BreakpointMap breakpoints_write;
-
-struct Module {
- std::string name;
- VAddr beg;
- VAddr end;
-};
-
-std::vector<Module> modules;
-} // Anonymous namespace
-
-void RegisterModule(std::string name, VAddr beg, VAddr end, bool add_elf_ext) {
- Module module;
- if (add_elf_ext) {
- Common::SplitPath(name, nullptr, &module.name, nullptr);
- module.name += ".elf";
- } else {
- module.name = std::move(name);
- }
- module.beg = beg;
- module.end = end;
- modules.push_back(std::move(module));
-}
-
-static Kernel::Thread* FindThreadById(s64 id) {
- const auto& threads = Core::System::GetInstance().GlobalScheduler().GetThreadList();
- for (auto& thread : threads) {
- if (thread->GetThreadID() == static_cast<u64>(id)) {
- current_core = thread->GetProcessorID();
- return thread.get();
- }
- }
- return nullptr;
-}
-
-static u64 RegRead(std::size_t id, Kernel::Thread* thread = nullptr) {
- if (!thread) {
- return 0;
- }
-
- const auto& thread_context = thread->GetContext64();
-
- 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 == PSTATE_REGISTER) {
- return thread_context.pstate;
- } else if (id > PSTATE_REGISTER && id < FPCR_REGISTER) {
- return thread_context.vector_registers[id - UC_ARM64_REG_Q0][0];
- } else {
- return 0;
- }
-}
-
-static void RegWrite(std::size_t id, u64 val, Kernel::Thread* thread = nullptr) {
- if (!thread) {
- return;
- }
-
- auto& thread_context = thread->GetContext64();
-
- 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 == PSTATE_REGISTER) {
- thread_context.pstate = static_cast<u32>(val);
- } else if (id > PSTATE_REGISTER && id < FPCR_REGISTER) {
- thread_context.vector_registers[id - (PSTATE_REGISTER + 1)][0] = val;
- }
-}
-
-static u128 FpuRead(std::size_t id, Kernel::Thread* thread = nullptr) {
- if (!thread) {
- return u128{0};
- }
-
- auto& thread_context = thread->GetContext64();
-
- if (id >= UC_ARM64_REG_Q0 && id < FPCR_REGISTER) {
- return thread_context.vector_registers[id - UC_ARM64_REG_Q0];
- } else if (id == FPCR_REGISTER) {
- return u128{thread_context.fpcr, 0};
- } else {
- return u128{0};
- }
-}
-
-static void FpuWrite(std::size_t id, u128 val, Kernel::Thread* thread = nullptr) {
- if (!thread) {
- return;
- }
-
- auto& thread_context = thread->GetContext64();
-
- if (id >= UC_ARM64_REG_Q0 && id < FPCR_REGISTER) {
- thread_context.vector_registers[id - UC_ARM64_REG_Q0] = val;
- } else if (id == FPCR_REGISTER) {
- thread_context.fpcr = static_cast<u32>(val[0]);
- }
-}
-
-/**
- * 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: {} ({:02X})", 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 src Pointer to array of output hex string characters.
- * @param len Length of src array.
- */
-static u32 HexToInt(const u8* src, std::size_t len) {
- u32 output = 0;
- while (len-- > 0) {
- output = (output << 4) | HexCharToValue(src[0]);
- src++;
- }
- return output;
-}
-
-/**
- * Converts input hex string characters into an array of equivalent of u8 bytes.
- *
- * @param src Pointer to array of output hex string characters.
- * @param len Length of src array.
- */
-static u64 HexToLong(const u8* src, std::size_t len) {
- u64 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, const u8* src, std::size_t 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, const u8* src, std::size_t 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.
- * @param v Value to convert.
- */
-static void IntToGdbHex(u8* dest, u32 v) {
- for (int i = 0; i < 8; i += 2) {
- dest[i + 1] = NibbleToHex(static_cast<u8>(v >> (4 * i)));
- dest[i] = NibbleToHex(static_cast<u8>(v >> (4 * (i + 1))));
- }
-}
-
-/**
- * Convert a u64 into a gdb-formatted hex string.
- *
- * @param dest Pointer to buffer to store output hex string characters.
- * @param v Value to convert.
- */
-static void LongToGdbHex(u8* dest, u64 v) {
- for (int i = 0; i < 16; i += 2) {
- dest[i + 1] = NibbleToHex(static_cast<u8>(v >> (4 * i)));
- dest[i] = NibbleToHex(static_cast<u8>(v >> (4 * (i + 1))));
- }
-}
-
-/**
- * Convert a gdb-formatted hex string into a u32.
- *
- * @param src Pointer to hex string.
- */
-static u32 GdbHexToInt(const 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;
-}
-
-/**
- * Convert a gdb-formatted hex string into a u64.
- *
- * @param src Pointer to hex string.
- */
-static u64 GdbHexToLong(const u8* src) {
- u64 output = 0;
-
- for (int i = 0; i < 16; i += 2) {
- output = (output << 4) | HexCharToValue(src[15 - i - 1]);
- output = (output << 4) | HexCharToValue(src[15 - i]);
- }
-
- return output;
-}
-
-/**
- * Convert a gdb-formatted hex string into a u128.
- *
- * @param src Pointer to hex string.
- */
-static u128 GdbHexToU128(const u8* src) {
- u128 output;
-
- for (int i = 0; i < 16; i += 2) {
- output[0] = (output[0] << 4) | HexCharToValue(src[15 - i - 1]);
- output[0] = (output[0] << 4) | HexCharToValue(src[15 - i]);
- }
-
- for (int i = 0; i < 16; i += 2) {
- output[1] = (output[1] << 4) | HexCharToValue(src[16 + 15 - i - 1]);
- output[1] = (output[1] << 4) | HexCharToValue(src[16 + 15 - i]);
- }
-
- return output;
-}
-
-/// Read a byte from the gdb client.
-static u8 ReadByte() {
- u8 c;
- std::size_t received_size = recv(gdbserver_socket, reinterpret_cast<char*>(&c), 1, MSG_WAITALL);
- if (received_size != 1) {
- LOG_ERROR(Debug_GDBStub, "recv failed: {}", received_size);
- Shutdown();
- }
-
- return c;
-}
-
-/// Calculate the checksum of the current command buffer.
-static u8 CalculateChecksum(const u8* buffer, std::size_t length) {
- return static_cast<u8>(std::accumulate(buffer, buffer + length, u8{0},
- [](u8 lhs, u8 rhs) { return u8(lhs + rhs); }));
-}
-
-/**
- * Get the map of breakpoints for a given breakpoint type.
- *
- * @param type Type of breakpoint map.
- */
-static BreakpointMap& GetBreakpointMap(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, VAddr addr) {
- BreakpointMap& p = GetBreakpointMap(type);
-
- const auto bp = p.find(addr);
- if (bp == p.end()) {
- return;
- }
-
- LOG_DEBUG(Debug_GDBStub, "gdb: removed a breakpoint: {:016X} bytes at {:016X} of type {}",
- bp->second.len, bp->second.addr, static_cast<int>(type));
-
- if (type == BreakpointType::Execute) {
- auto& system = Core::System::GetInstance();
- system.Memory().WriteBlock(bp->second.addr, bp->second.inst.data(), bp->second.inst.size());
- system.InvalidateCpuInstructionCaches();
- }
- p.erase(addr);
-}
-
-BreakpointAddress GetNextBreakpointFromAddress(VAddr addr, BreakpointType type) {
- const BreakpointMap& p = GetBreakpointMap(type);
- const 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(VAddr addr, BreakpointType type) {
- if (!IsConnected()) {
- return false;
- }
-
- const BreakpointMap& p = GetBreakpointMap(type);
- const auto bp = p.find(addr);
-
- if (bp == p.end()) {
- return false;
- }
-
- u64 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 {} @ {:016X}, range: {:016X}"
- " - {:016X} ({:X} bytes)",
- static_cast<int>(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) {
- std::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;
- }
-
- 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)) {
- 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 '{}'", command_buffer + 1);
-
- const char* query = reinterpret_cast<const char*>(command_buffer + 1);
-
- if (strcmp(query, "TStatus") == 0) {
- SendReply("T0");
- } else if (strncmp(query, "Supported", strlen("Supported")) == 0) {
- // PacketSize needs to be large enough for target xml
- std::string buffer = "PacketSize=2000;qXfer:features:read+;qXfer:threads:read+";
- if (!modules.empty()) {
- buffer += ";qXfer:libraries:read+";
- }
- SendReply(buffer.c_str());
- } 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) {
- const VAddr base_address =
- Core::System::GetInstance().CurrentProcess()->PageTable().GetCodeRegionStart();
- std::string buffer = fmt::format("TextSeg={:0x}", base_address);
- SendReply(buffer.c_str());
- } else if (strncmp(query, "fThreadInfo", strlen("fThreadInfo")) == 0) {
- std::string val = "m";
- const auto& threads = Core::System::GetInstance().GlobalScheduler().GetThreadList();
- for (const auto& thread : threads) {
- val += fmt::format("{:x},", thread->GetThreadID());
- }
- val.pop_back();
- SendReply(val.c_str());
- } else if (strncmp(query, "sThreadInfo", strlen("sThreadInfo")) == 0) {
- SendReply("l");
- } else if (strncmp(query, "Xfer:threads:read", strlen("Xfer:threads:read")) == 0) {
- std::string buffer;
- buffer += "l<?xml version=\"1.0\"?>";
- buffer += "<threads>";
- const auto& threads = Core::System::GetInstance().GlobalScheduler().GetThreadList();
- for (const auto& thread : threads) {
- buffer +=
- fmt::format(R"*(<thread id="{:x}" core="{:d}" name="Thread {:x}"></thread>)*",
- thread->GetThreadID(), thread->GetProcessorID(), thread->GetThreadID());
- }
- buffer += "</threads>";
- SendReply(buffer.c_str());
- } else if (strncmp(query, "Xfer:libraries:read", strlen("Xfer:libraries:read")) == 0) {
- std::string buffer;
- buffer += "l<?xml version=\"1.0\"?>";
- buffer += "<library-list>";
- for (const auto& module : modules) {
- buffer +=
- fmt::format(R"*("<library name = "{}"><segment address = "0x{:x}"/></library>)*",
- module.name, module.beg);
- }
- buffer += "</library-list>";
- SendReply(buffer.c_str());
- } else {
- SendReply("");
- }
-}
-
-/// Handle set thread command from gdb client.
-static void HandleSetThread() {
- int thread_id = -1;
- if (command_buffer[2] != '-') {
- thread_id = static_cast<int>(HexToInt(command_buffer + 2, command_length - 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));
- if (thread_id == 0) {
- thread_id = 1;
- }
- if (FindThreadById(thread_id)) {
- SendReply("OK");
- return;
- }
- SendReply("E01");
-}
-
-/**
- * Send signal packet to client.
- *
- * @param signal Signal to be sent to client.
- */
-static void SendSignal(Kernel::Thread* thread, u32 signal, bool full = true) {
- if (gdbserver_socket == -1) {
- return;
- }
-
- latest_signal = signal;
-
- if (!thread) {
- full = false;
- }
-
- std::string buffer;
- if (full) {
- buffer = fmt::format("T{:02x}{:02x}:{:016x};{:02x}:{:016x};{:02x}:{:016x}", latest_signal,
- PC_REGISTER, Common::swap64(RegRead(PC_REGISTER, thread)), SP_REGISTER,
- Common::swap64(RegRead(SP_REGISTER, thread)), LR_REGISTER,
- Common::swap64(RegRead(LR_REGISTER, thread)));
- } else {
- buffer = fmt::format("T{:02x}", latest_signal);
- }
-
- if (thread) {
- buffer += fmt::format(";thread:{:x};", thread->GetThreadID());
- }
-
- 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");
- halt_loop = true;
- SendSignal(current_thread, SIGTRAP);
- return;
- } else if (c != GDB_STUB_START) {
- LOG_DEBUG(Debug_GDBStub, "gdb: read invalid byte {:02X}", c);
- return;
- }
-
- while ((c = ReadByte()) != GDB_STUB_END) {
- if (command_length >= sizeof(command_buffer)) {
- LOG_ERROR(Debug_GDBStub, "gdb: command_buffer overflow");
- 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 ${}# (length: {})",
- 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(static_cast<u32>(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) != 0;
-}
-
-/// 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 <= SP_REGISTER) {
- LongToGdbHex(reply, RegRead(id, current_thread));
- } else if (id == PC_REGISTER) {
- LongToGdbHex(reply, RegRead(id, current_thread));
- } else if (id == PSTATE_REGISTER) {
- IntToGdbHex(reply, static_cast<u32>(RegRead(id, current_thread)));
- } else if (id >= UC_ARM64_REG_Q0 && id < FPCR_REGISTER) {
- u128 r = FpuRead(id, current_thread);
- LongToGdbHex(reply, r[0]);
- LongToGdbHex(reply + 16, r[1]);
- } else if (id == FPCR_REGISTER) {
- u128 r = FpuRead(id, current_thread);
- IntToGdbHex(reply, static_cast<u32>(r[0]));
- } else if (id == FPCR_REGISTER + 1) {
- u128 r = FpuRead(id, current_thread);
- IntToGdbHex(reply, static_cast<u32>(r[0] >> 32));
- }
-
- 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 (u32 reg = 0; reg <= SP_REGISTER; reg++) {
- LongToGdbHex(bufptr + reg * 16, RegRead(reg, current_thread));
- }
-
- bufptr += 32 * 16;
-
- LongToGdbHex(bufptr, RegRead(PC_REGISTER, current_thread));
-
- bufptr += 16;
-
- IntToGdbHex(bufptr, static_cast<u32>(RegRead(PSTATE_REGISTER, current_thread)));
-
- bufptr += 8;
-
- u128 r;
-
- for (u32 reg = UC_ARM64_REG_Q0; reg < FPCR_REGISTER; reg++) {
- r = FpuRead(reg, current_thread);
- LongToGdbHex(bufptr + reg * 32, r[0]);
- LongToGdbHex(bufptr + reg * 32 + 16, r[1]);
- }
-
- bufptr += 32 * 32;
-
- r = FpuRead(FPCR_REGISTER, current_thread);
- IntToGdbHex(bufptr, static_cast<u32>(r[0]));
-
- bufptr += 8;
-
- SendReply(reinterpret_cast<char*>(buffer));
-}
-
-/// Modify data of register specified by gdb client.
-static void WriteRegister() {
- const 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 <= SP_REGISTER) {
- RegWrite(id, GdbHexToLong(buffer_ptr), current_thread);
- } else if (id == PC_REGISTER) {
- RegWrite(id, GdbHexToLong(buffer_ptr), current_thread);
- } else if (id == PSTATE_REGISTER) {
- RegWrite(id, GdbHexToInt(buffer_ptr), current_thread);
- } else if (id >= UC_ARM64_REG_Q0 && id < FPCR_REGISTER) {
- FpuWrite(id, GdbHexToU128(buffer_ptr), current_thread);
- } else if (id == FPCR_REGISTER) {
- } else if (id == FPCR_REGISTER + 1) {
- }
-
- // Update ARM context, skipping scheduler - no running threads at this point
- Core::System::GetInstance()
- .ArmInterface(current_core)
- .LoadContext(current_thread->GetContext64());
-
- SendReply("OK");
-}
-
-/// Modify all registers with data received from the client.
-static void WriteRegisters() {
- const u8* buffer_ptr = command_buffer + 1;
-
- if (command_buffer[0] != 'G')
- return SendReply("E01");
-
- for (u32 i = 0, reg = 0; reg <= FPCR_REGISTER; i++, reg++) {
- if (reg <= SP_REGISTER) {
- RegWrite(reg, GdbHexToLong(buffer_ptr + i * 16), current_thread);
- } else if (reg == PC_REGISTER) {
- RegWrite(PC_REGISTER, GdbHexToLong(buffer_ptr + i * 16), current_thread);
- } else if (reg == PSTATE_REGISTER) {
- RegWrite(PSTATE_REGISTER, GdbHexToInt(buffer_ptr + i * 16), current_thread);
- } else if (reg >= UC_ARM64_REG_Q0 && reg < FPCR_REGISTER) {
- RegWrite(reg, GdbHexToLong(buffer_ptr + i * 16), current_thread);
- } else if (reg == FPCR_REGISTER) {
- RegWrite(FPCR_REGISTER, GdbHexToLong(buffer_ptr + i * 16), current_thread);
- } else if (reg == FPCR_REGISTER + 1) {
- RegWrite(FPCR_REGISTER, GdbHexToLong(buffer_ptr + i * 16), current_thread);
- }
- }
-
- // Update ARM context, skipping scheduler - no running threads at this point
- Core::System::GetInstance()
- .ArmInterface(current_core)
- .LoadContext(current_thread->GetContext64());
-
- 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;
- const auto addr_pos = std::find(start_offset, command_buffer + command_length, ',');
- const VAddr addr = HexToLong(start_offset, static_cast<u64>(addr_pos - start_offset));
-
- start_offset = addr_pos + 1;
- const u64 len =
- HexToLong(start_offset, static_cast<u64>((command_buffer + command_length) - start_offset));
-
- LOG_DEBUG(Debug_GDBStub, "gdb: addr: {:016X} len: {:016X}", addr, len);
-
- if (len * 2 > sizeof(reply)) {
- SendReply("E01");
- }
-
- auto& memory = Core::System::GetInstance().Memory();
- if (!memory.IsValidVirtualAddress(addr)) {
- return SendReply("E00");
- }
-
- std::vector<u8> data(len);
- memory.ReadBlock(addr, data.data(), len);
-
- MemToGdbHex(reply, data.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;
- const auto addr_pos = std::find(start_offset, command_buffer + command_length, ',');
- const VAddr addr = HexToLong(start_offset, static_cast<u64>(addr_pos - start_offset));
-
- start_offset = addr_pos + 1;
- const auto len_pos = std::find(start_offset, command_buffer + command_length, ':');
- const u64 len = HexToLong(start_offset, static_cast<u64>(len_pos - start_offset));
-
- auto& system = Core::System::GetInstance();
- auto& memory = system.Memory();
- if (!memory.IsValidVirtualAddress(addr)) {
- return SendReply("E00");
- }
-
- std::vector<u8> data(len);
- GdbHexToMem(data.data(), len_pos + 1, len);
- memory.WriteBlock(addr, data.data(), len);
- system.InvalidateCpuInstructionCaches();
- SendReply("OK");
-}
-
-void Break(bool is_memory_break) {
- send_trap = true;
-
- memory_break = is_memory_break;
-}
-
-/// Tell the CPU that it should perform a single step.
-static void Step() {
- if (command_length > 1) {
- RegWrite(PC_REGISTER, GdbHexToLong(command_buffer + 1), current_thread);
- // Update ARM context, skipping scheduler - no running threads at this point
- Core::System::GetInstance()
- .ArmInterface(current_core)
- .LoadContext(current_thread->GetContext64());
- }
- step_loop = true;
- halt_loop = true;
- send_trap = true;
- Core::System::GetInstance().InvalidateCpuInstructionCaches();
-}
-
-/// Tell the CPU if we hit a memory breakpoint.
-bool IsMemoryBreak() {
- if (!IsConnected()) {
- return false;
- }
-
- return memory_break;
-}
-
-/// Tell the CPU to continue executing.
-static void Continue() {
- memory_break = false;
- step_loop = false;
- halt_loop = false;
- Core::System::GetInstance().InvalidateCpuInstructionCaches();
-}
-
-/**
- * Commit breakpoint to list of breakpoints.
- *
- * @param type Type of breakpoint.
- * @param addr Address of breakpoint.
- * @param len Length of breakpoint.
- */
-static bool CommitBreakpoint(BreakpointType type, VAddr addr, u64 len) {
- BreakpointMap& p = GetBreakpointMap(type);
-
- Breakpoint breakpoint;
- breakpoint.active = true;
- breakpoint.addr = addr;
- breakpoint.len = len;
-
- auto& system = Core::System::GetInstance();
- auto& memory = system.Memory();
- memory.ReadBlock(addr, breakpoint.inst.data(), breakpoint.inst.size());
-
- static constexpr std::array<u8, 4> btrap{0x00, 0x7d, 0x20, 0xd4};
- if (type == BreakpointType::Execute) {
- memory.WriteBlock(addr, btrap.data(), btrap.size());
- system.InvalidateCpuInstructionCaches();
- }
- p.insert({addr, breakpoint});
-
- LOG_DEBUG(Debug_GDBStub, "gdb: added {} breakpoint: {:016X} bytes at {:016X}",
- static_cast<int>(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, ',');
- VAddr addr = HexToLong(start_offset, static_cast<u64>(addr_pos - start_offset));
-
- start_offset = addr_pos + 1;
- u64 len =
- HexToLong(start_offset, static_cast<u64>((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, ',');
- VAddr addr = HexToLong(start_offset, static_cast<u64>(addr_pos - 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()) {
- if (defer_start) {
- ToggleServer(true);
- }
- return;
- }
-
- if (!IsDataAvailable()) {
- return;
- }
-
- ReadCommand();
- if (command_length == 0) {
- return;
- }
-
- LOG_DEBUG(Debug_GDBStub, "Packet: {}", command_buffer);
-
- switch (command_buffer[0]) {
- case 'q':
- HandleQuery();
- break;
- case 'H':
- HandleSetThread();
- break;
- case '?':
- SendSignal(current_thread, 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;
- case 'T':
- HandleThreadAlive();
- break;
- default:
- SendReply("");
- break;
- }
-}
-
-void SetServerPort(u16 port) {
- gdbstub_port = port;
-}
-
-void ToggleServer(bool status) {
- if (status) {
- server_enabled = status;
-
- // Start server
- if (!IsConnected() && Core::System::GetInstance().IsPoweredOn()) {
- Init();
- }
- } else {
- // Stop server
- if (IsConnected()) {
- Shutdown();
- }
-
- server_enabled = status;
- }
-}
-
-void DeferStart() {
- defer_start = true;
-}
-
-static void Init(u16 port) {
- if (!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();
-
- modules.clear();
-
- // Start gdb server
- LOG_INFO(Debug_GDBStub, "Starting GDB server on port {}...", 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 = static_cast<int>(socket(PF_INET, SOCK_STREAM, 0));
- if (tmpsock == -1) {
- 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) {
- 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) {
- 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...");
- sockaddr_in saddr_client;
- sockaddr* client_addr = reinterpret_cast<sockaddr*>(&saddr_client);
- socklen_t client_addrlen = sizeof(saddr_client);
- gdbserver_socket = static_cast<int>(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.");
- 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 (!server_enabled) {
- return;
- }
- defer_start = false;
-
- 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 IsServerEnabled() {
- return server_enabled;
-}
-
-bool IsConnected() {
- return IsServerEnabled() && gdbserver_socket != -1;
-}
-
-bool GetCpuHaltFlag() {
- return halt_loop;
-}
-
-bool GetCpuStepFlag() {
- return step_loop;
-}
-
-void SetCpuStepFlag(bool is_step) {
- step_loop = is_step;
-}
-
-void SendTrap(Kernel::Thread* thread, int trap) {
- if (!send_trap) {
- return;
- }
-
- current_thread = thread;
- SendSignal(thread, trap);
-
- halt_loop = true;
- send_trap = false;
-}
-}; // namespace GDBStub
diff --git a/src/core/gdbstub/gdbstub.h b/src/core/gdbstub/gdbstub.h
deleted file mode 100644
index 8fe3c320b..000000000
--- a/src/core/gdbstub/gdbstub.h
+++ /dev/null
@@ -1,114 +0,0 @@
-// 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 <string>
-#include "common/common_types.h"
-#include "core/hle/kernel/thread.h"
-
-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 {
- VAddr address;
- BreakpointType type;
-};
-
-/**
- * Set the port the gdbstub should use to listen for connections.
- *
- * @param port Port to listen for connection
- */
-void SetServerPort(u16 port);
-
-/**
- * Starts or stops the server if possible.
- *
- * @param status Set the server to enabled or disabled.
- */
-void ToggleServer(bool status);
-
-/// Start the gdbstub server.
-void Init();
-
-/**
- * Defer initialization of the gdbstub to the first packet processing functions.
- * This avoids a case where the gdbstub thread is frozen after initialization
- * and fails to respond in time to packets.
- */
-void DeferStart();
-
-/// Stop gdbstub server.
-void Shutdown();
-
-/// Checks if the gdbstub server is enabled.
-bool IsServerEnabled();
-
-/// Returns true if there is an active socket connection.
-bool IsConnected();
-
-/// Register module.
-void RegisterModule(std::string name, VAddr beg, VAddr end, bool add_elf_ext = true);
-
-/**
- * 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(VAddr 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(VAddr 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);
-
-/**
- * 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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 02:01:38 +0100