mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-14 07:56:45 +00:00
507 lines
No EOL
18 KiB
C++
507 lines
No EOL
18 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "dmnt2_debug_log.hpp"
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#include "dmnt2_debug_process.hpp"
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namespace ams::dmnt {
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namespace {
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s32 SignExtend(u32 value, u32 bits) {
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return static_cast<s32>(value << (32 - bits)) >> (32 - bits);
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}
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}
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Result DebugProcess::Attach(os::ProcessId process_id) {
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/* Attach to the process. */
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R_TRY(svc::DebugActiveProcess(std::addressof(m_debug_handle), process_id.value));
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/* Collect initial information. */
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R_TRY(this->Start());
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/* Get the attached modules. */
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R_TRY(this->CollectModules());
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/* Get our process id. */
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u64 pid_value = 0;
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svc::GetProcessId(std::addressof(pid_value), m_debug_handle);
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m_process_id = { pid_value };
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return ResultSuccess();
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}
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void DebugProcess::Detach() {
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if (m_is_valid) {
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m_software_breakpoints.ClearAll();
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m_hardware_breakpoints.ClearAll();
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m_hardware_watchpoints.ClearAll();
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R_ABORT_UNLESS(svc::CloseHandle(m_debug_handle));
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m_debug_handle = svc::InvalidHandle;
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}
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m_is_valid = false;
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}
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Result DebugProcess::Start() {
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/* Process the initial debug events. */
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s32 num_threads = 0;
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bool attached = false;
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while (num_threads == 0 || !attached) {
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/* Wait for debug events to be available. */
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s32 dummy_index;
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R_ABORT_UNLESS(svc::WaitSynchronization(std::addressof(dummy_index), std::addressof(m_debug_handle), 1, svc::WaitInfinite));
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/* Get debug event. */
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svc::DebugEventInfo d;
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R_ABORT_UNLESS(svc::GetDebugEvent(std::addressof(d), m_debug_handle));
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/* Handle the debug event. */
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switch (d.type) {
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case svc::DebugEvent_CreateProcess:
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{
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/* Set our create process info. */
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m_create_process_info = d.info.create_process;
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/* Cache our bools. */
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m_is_64_bit = (m_create_process_info.flags & svc::CreateProcessFlag_Is64Bit);
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m_is_64_bit_address_space = (m_create_process_info.flags & svc::CreateProcessFlag_AddressSpaceMask) == svc::CreateProcessFlag_AddressSpace64Bit;
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}
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break;
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case svc::DebugEvent_CreateThread:
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{
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++num_threads;
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if (const s32 index = this->ThreadCreate(d.thread_id); index >= 0) {
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const Result result = osdbg::InitializeThreadInfo(std::addressof(m_thread_infos[index]), m_debug_handle, std::addressof(m_create_process_info), std::addressof(d.info.create_thread));
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if (R_FAILED(result)) {
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AMS_DMNT2_GDB_LOG_WARN("DebugProcess::Start: InitializeThreadInfo(%lx) failed: %08x\n", d.thread_id, result.GetValue());
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}
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}
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}
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break;
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case svc::DebugEvent_ExitThread:
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{
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--num_threads;
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this->ThreadExit(d.thread_id);
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}
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break;
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case svc::DebugEvent_Exception:
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{
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if (d.info.exception.type == svc::DebugException_DebuggerAttached) {
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attached = true;
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}
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}
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break;
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default:
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break;
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}
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}
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/* Set ourselves as valid. */
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m_is_valid = true;
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this->SetDebugBreaked();
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return ResultSuccess();
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}
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s32 DebugProcess::ThreadCreate(u64 thread_id) {
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for (size_t i = 0; i < ThreadCountMax; ++i) {
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if (!m_thread_valid[i]) {
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m_thread_valid[i] = true;
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m_thread_ids[i] = thread_id;
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this->SetLastThreadId(thread_id);
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this->SetLastSignal(GdbSignal_BreakpointTrap);
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++m_thread_count;
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return i;
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}
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}
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return -1;
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}
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void DebugProcess::ThreadExit(u64 thread_id) {
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for (size_t i = 0; i < ThreadCountMax; ++i) {
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if (m_thread_valid[i] && m_thread_ids[i] == thread_id) {
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m_thread_valid[i] = false;
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m_thread_ids[i] = 0;
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this->SetLastThreadId(thread_id);
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this->SetLastSignal(GdbSignal_BreakpointTrap);
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--m_thread_count;
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break;
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}
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}
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}
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Result DebugProcess::CollectModules() {
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/* Traverse the address space, looking for modules. */
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uintptr_t address = 0;
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while (true) {
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/* Query the current address. */
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svc::MemoryInfo memory_info;
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svc::PageInfo page_info;
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if (R_SUCCEEDED(svc::QueryDebugProcessMemory(std::addressof(memory_info), std::addressof(page_info), m_debug_handle, address))) {
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if (memory_info.perm == svc::MemoryPermission_ReadExecute && (memory_info.state == svc::MemoryState_Code || memory_info.state == svc::MemoryState_AliasCode)) {
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/* Check that we can add the module. */
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AMS_ABORT_UNLESS(m_module_count < ModuleCountMax);
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/* Get module definition. */
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auto &module = m_module_definitions[m_module_count++];
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/* Set module address/size. */
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module.SetAddressSize(memory_info.addr, memory_info.size);
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/* Get module name buffer. */
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char *module_name = module.GetNameBuffer();
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module_name[0] = 0;
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/* Read module path. */
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struct {
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u32 zero;
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s32 path_length;
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char path[ModuleDefinition::PathLengthMax];
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} module_path;
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if (R_SUCCEEDED(this->ReadMemory(std::addressof(module_path), memory_info.addr + memory_info.size, sizeof(module_path)))) {
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if (module_path.zero == 0 && module_path.path_length == util::Strnlen(module_path.path, sizeof(module_path.path))) {
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std::memcpy(module_name, module_path.path, ModuleDefinition::PathLengthMax);
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}
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}
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/* Truncate module name. */
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module_name[ModuleDefinition::PathLengthMax - 1] = 0;
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}
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}
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/* Check if we're done. */
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const uintptr_t next_address = memory_info.addr + memory_info.size;
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if (memory_info.state == svc::MemoryState_Inaccessible) {
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break;
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}
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if (next_address <= address) {
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break;
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}
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address = next_address;
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}
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return ResultSuccess();
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}
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Result DebugProcess::GetThreadContext(svc::ThreadContext *out, u64 thread_id, u32 flags) {
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return svc::GetDebugThreadContext(out, m_debug_handle, thread_id, flags);
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}
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Result DebugProcess::SetThreadContext(const svc::ThreadContext *ctx, u64 thread_id, u32 flags) {
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return svc::SetDebugThreadContext(m_debug_handle, thread_id, ctx, flags);
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}
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Result DebugProcess::ReadMemory(void *dst, uintptr_t address, size_t size) {
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return svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(dst), m_debug_handle, address, size);
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}
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Result DebugProcess::WriteMemory(const void *src, uintptr_t address, size_t size) {
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return svc::WriteDebugProcessMemory(m_debug_handle, reinterpret_cast<uintptr_t>(src), address, size);
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}
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Result DebugProcess::Continue() {
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AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Continue() all\n");
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u64 thread_ids[] = { 0 };
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R_TRY(svc::ContinueDebugEvent(m_debug_handle, svc::ContinueFlag_ExceptionHandled | svc::ContinueFlag_EnableExceptionEvent | svc::ContinueFlag_ContinueAll, thread_ids, util::size(thread_ids)));
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m_continue_thread_id = 0;
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m_status = ProcessStatus_Running;
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this->SetLastThreadId(0);
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this->SetLastSignal(GdbSignal_Signal0);
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return ResultSuccess();
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}
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Result DebugProcess::Continue(u64 thread_id) {
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AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Continue() thread_id=%lx\n", thread_id);
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u64 thread_ids[] = { thread_id };
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R_TRY(svc::ContinueDebugEvent(m_debug_handle, svc::ContinueFlag_ExceptionHandled | svc::ContinueFlag_EnableExceptionEvent, thread_ids, util::size(thread_ids)));
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m_continue_thread_id = thread_id;
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m_status = ProcessStatus_Running;
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this->SetLastThreadId(0);
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this->SetLastSignal(GdbSignal_Signal0);
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return ResultSuccess();
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}
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Result DebugProcess::Step() {
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AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Step() all\n");
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return this->Step(this->GetLastThreadId());
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}
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Result DebugProcess::Step(u64 thread_id) {
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AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Step() thread_id=%lx\n", thread_id);
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/* Get the thread context. */
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svc::ThreadContext ctx;
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R_TRY(this->GetThreadContext(std::addressof(ctx), thread_id, svc::ThreadContextFlag_Control));
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/* Note that we're stepping. */
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m_stepping = true;
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/* Determine where we're stepping to. */
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u64 current_pc = ctx.pc;
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u64 step_target = 0;
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this->GetBranchTarget(ctx, thread_id, current_pc, step_target);
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/* Ensure we end with valid breakpoints. */
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auto bp_guard = SCOPE_GUARD { this->ClearStep(); };
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/* Set step breakpoint on current pc. */
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/* TODO: aarch32 breakpoints. */
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if (current_pc) {
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R_TRY(m_step_breakpoints.SetBreakPoint(current_pc, sizeof(u32), true));
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}
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if (step_target) {
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R_TRY(m_step_breakpoints.SetBreakPoint(step_target, sizeof(u32), true));
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}
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bp_guard.Cancel();
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return ResultSuccess();
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}
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void DebugProcess::ClearStep() {
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/* If we should, clear our step breakpoints. */
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if (m_stepping) {
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m_step_breakpoints.ClearStep();
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m_stepping = false;
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}
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}
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Result DebugProcess::Break() {
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if (this->GetStatus() == ProcessStatus_Running) {
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AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Break\n");
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return svc::BreakDebugProcess(m_debug_handle);
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} else {
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AMS_DMNT2_GDB_LOG_ERROR("DebugProcess::Break called on non-running process!\n");
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return ResultSuccess();
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}
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}
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void DebugProcess::GetBranchTarget(svc::ThreadContext &ctx, u64 thread_id, u64 ¤t_pc, u64 &target) {
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/* Save pc, in case we modify it. */
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const u64 pc = current_pc;
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/* Clear the target. */
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target = 0;
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/* By default, we advance by four. */
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current_pc += 4;
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/* Get the instruction where we were. */
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u32 insn = 0;
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this->ReadMemory(std::addressof(insn), pc, sizeof(insn));
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/* Handle by architecture. */
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bool is_call = false;
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if (this->Is64Bit()) {
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if ((insn & 0x7C000000) == 0x14000000) {
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/* Unconditional branch (b/bl) */
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if (insn != 0x14000001) {
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is_call = (insn & 0x80000000) == 0x80000000;
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current_pc = 0;
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target = SignExtend(((insn & 0x03FFFFFF) << 2), 28) + pc;
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}
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} else if ((insn & 0x7E000000) == 0x34000000) {
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/* Compare/Branch (cbz/cbnz) */
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target = SignExtend(((insn & 0x00FFFFE0) >> 3), 21) + pc;
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} else if ((insn & 0x7E000000) == 0x36000000) {
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/* Test and branch (tbz/tbnz) */
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target = SignExtend(((insn & 0x0007FFE0) >> 3), 16) + pc;
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} else if ((insn & 0xFF000010) == 0x54000000) {
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/* Conditional branch (b.*) */
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if ((insn & 0xF) == 0xE) {
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/* Unconditional. */
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current_pc = 0;
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}
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target = SignExtend(((insn & 0x00FFFFE0) >> 3), 21) + pc;
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} else if ((insn & 0xFF8FFC1F) == 0xD60F0000) {
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/* Unconditional branch */
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is_call = (insn & 0x00F00000) == 0x00300000;
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if (!is_call) {
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current_pc = 0;
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}
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/* Get the register. */
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svc::ThreadContext new_ctx;
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if (R_SUCCEEDED(this->GetThreadContext(std::addressof(new_ctx), thread_id, svc::ThreadContextFlag_Control | svc::ThreadContextFlag_General))) {
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const int reg = (insn & 0x03E0) >> 5;
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if (reg < 29) {
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target = new_ctx.r[reg];
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} else if (reg == 29) {
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target = new_ctx.fp;
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} else if (reg == 30) {
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target = new_ctx.lr;
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} else if (reg == 31) {
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target = new_ctx.sp;
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}
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}
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}
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} else {
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/* TODO aarch32 branch decoding */
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}
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}
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Result DebugProcess::SetBreakPoint(uintptr_t address, size_t size, bool is_step) {
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return m_software_breakpoints.SetBreakPoint(address, size, is_step);
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}
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Result DebugProcess::ClearBreakPoint(uintptr_t address, size_t size) {
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m_software_breakpoints.ClearBreakPoint(address, size);
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return ResultSuccess();
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}
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Result DebugProcess::SetHardwareBreakPoint(uintptr_t address, size_t size, bool is_step) {
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return m_hardware_breakpoints.SetBreakPoint(address, size, is_step);
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}
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Result DebugProcess::ClearHardwareBreakPoint(uintptr_t address, size_t size) {
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m_hardware_breakpoints.ClearBreakPoint(address, size);
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return ResultSuccess();
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}
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Result DebugProcess::SetWatchPoint(u64 address, u64 size, bool read, bool write) {
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return m_hardware_watchpoints.SetWatchPoint(address, size, read, write);
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}
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Result DebugProcess::ClearWatchPoint(u64 address, u64 size) {
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return m_hardware_watchpoints.ClearBreakPoint(address, size);
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}
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Result DebugProcess::GetWatchPointInfo(u64 address, bool &read, bool &write) {
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return m_hardware_watchpoints.GetWatchPointInfo(address, read, write);
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}
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bool DebugProcess::IsValidWatchPoint(u64 address, u64 size) {
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return HardwareWatchPointManager::IsValidWatchPoint(address, size);
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}
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Result DebugProcess::GetThreadCurrentCore(u32 *out, u64 thread_id) {
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u64 dummy_value;
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u32 val32 = 0;
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R_TRY(svc::GetDebugThreadParam(std::addressof(dummy_value), std::addressof(val32), m_debug_handle, thread_id, svc::DebugThreadParam_CurrentCore));
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*out = val32;
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return ResultSuccess();
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}
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Result DebugProcess::GetProcessDebugEvent(svc::DebugEventInfo *out) {
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/* Get the event. */
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R_TRY(svc::GetDebugEvent(out, m_debug_handle));
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/* Process the event. */
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switch (out->type) {
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case svc::DebugEvent_CreateProcess:
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{
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/* Set our create process info. */
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m_create_process_info = out->info.create_process;
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/* Cache our bools. */
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m_is_64_bit = (m_create_process_info.flags & svc::CreateProcessFlag_Is64Bit);
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m_is_64_bit_address_space = (m_create_process_info.flags & svc::CreateProcessFlag_AddressSpaceMask) == svc::CreateProcessFlag_AddressSpace64Bit;
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}
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break;
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case svc::DebugEvent_CreateThread:
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{
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if (const s32 index = this->ThreadCreate(out->thread_id); index >= 0) {
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const Result result = osdbg::InitializeThreadInfo(std::addressof(m_thread_infos[index]), m_debug_handle, std::addressof(m_create_process_info), std::addressof(out->info.create_thread));
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if (R_FAILED(result)) {
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AMS_DMNT2_GDB_LOG_WARN("DebugProcess::GetProcessDebugEvent: InitializeThreadInfo(%lx) failed: %08x\n", out->thread_id, result.GetValue());
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}
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}
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}
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break;
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case svc::DebugEvent_ExitThread:
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{
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this->ThreadExit(out->thread_id);
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}
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break;
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default:
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break;
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}
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if (out->flags & svc::DebugEventFlag_Stopped) {
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this->SetDebugBreaked();
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}
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return ResultSuccess();
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}
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u64 DebugProcess::GetLastThreadId() {
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/* Select our first valid thread id. */
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if (m_last_thread_id == 0) {
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for (size_t i = 0; i < ThreadCountMax; ++i) {
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if (m_thread_valid[i]) {
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SetLastThreadId(m_thread_ids[i]);
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break;
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}
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}
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}
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return m_last_thread_id;
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}
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Result DebugProcess::GetThreadList(s32 *out_count, u64 *out_thread_ids, size_t max_count) {
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s32 count = 0;
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for (size_t i = 0; i < ThreadCountMax; ++i) {
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if (m_thread_valid[i]) {
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if (count < static_cast<s32>(max_count)) {
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out_thread_ids[count++] = m_thread_ids[i];
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}
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}
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}
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*out_count = count;
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return ResultSuccess();
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}
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Result DebugProcess::GetThreadInfoList(s32 *out_count, osdbg::ThreadInfo **out_infos, size_t max_count) {
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s32 count = 0;
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for (size_t i = 0; i < ThreadCountMax; ++i) {
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if (m_thread_valid[i]) {
|
|
if (count < static_cast<s32>(max_count)) {
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out_infos[count++] = std::addressof(m_thread_infos[i]);
|
|
}
|
|
}
|
|
}
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|
|
|
*out_count = count;
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|
return ResultSuccess();
|
|
}
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|
|
|
|
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} |