mirror of
https://github.com/Atmosphere-NX/Atmosphere
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236 lines
10 KiB
C++
236 lines
10 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_hardware_breakpoint.hpp"
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#include "dmnt2_debug_process.hpp"
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#include "dmnt2_debug_log.hpp"
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namespace ams::dmnt {
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namespace {
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constinit auto g_last_bp_register = -1;
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constinit auto g_first_bp_ctx_register = -1;
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constinit auto g_last_bp_ctx_register = -1;
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constinit auto g_last_wp_register = -1;
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constinit os::SdkMutex g_multicore_lock;
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constinit bool g_multicore_started = false;
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alignas(os::ThreadStackAlignment) constinit u8 g_multicore_thread_stack[16_KB];
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constinit os::ThreadType g_multicore_thread;
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constinit os::MessageQueueType g_multicore_request_queue;
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constinit os::MessageQueueType g_multicore_response_queue;
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constinit uintptr_t g_multicore_request_storage[2];
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constinit uintptr_t g_multicore_response_storage[2];
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void MultiCoreThread(void *) {
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/* Get thread core mask. */
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s32 cur_core;
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u64 core_mask;
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R_ABORT_UNLESS(svc::GetThreadCoreMask(std::addressof(cur_core), std::addressof(core_mask), svc::PseudoHandle::CurrentThread));
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/* Service requests. */
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while (true) {
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/* Wait for a request to come in. */
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uintptr_t request_v;
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os::ReceiveMessageQueue(std::addressof(request_v), std::addressof(g_multicore_request_queue));
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/* Process the request. */
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const uintptr_t *request = reinterpret_cast<const uintptr_t *>(request_v);
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bool success = true;
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if (request[0] == 1) {
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/* Set on each core. */
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for (s32 core = 0; core < 4; ++core) {
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/* Switch to the desired core. */
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R_ABORT_UNLESS(svc::SetThreadCoreMask(svc::PseudoHandle::CurrentThread, core, (1 << core)));
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/* Get the core mask. */
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R_ABORT_UNLESS(svc::GetThreadCoreMask(std::addressof(cur_core), std::addressof(core_mask), svc::PseudoHandle::CurrentThread));
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/* Set the breakpoint. */
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const Result result = svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(request[1]), request[2], request[3]);
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if (R_FAILED(result)) {
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success = false;
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AMS_DMNT2_GDB_LOG_ERROR("SetHardwareBreakPoint FAIL 0x%08x, core=%d, reg=%lu, ctrl=%lx, val=%lx\n", result.GetValue(), core, request[1], request[2], request[3]);
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break;
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}
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}
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}
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os::SendMessageQueue(std::addressof(g_multicore_response_queue), static_cast<uintptr_t>(success));
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}
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}
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void EnsureMultiCoreStarted() {
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std::scoped_lock lk(g_multicore_lock);
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if (!g_multicore_started) {
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os::InitializeMessageQueue(std::addressof(g_multicore_request_queue), g_multicore_request_storage, util::size(g_multicore_request_storage));
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os::InitializeMessageQueue(std::addressof(g_multicore_response_queue), g_multicore_response_storage, util::size(g_multicore_response_storage));
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R_ABORT_UNLESS(os::CreateThread(std::addressof(g_multicore_thread), MultiCoreThread, nullptr, g_multicore_thread_stack, sizeof(g_multicore_thread_stack), os::HighestThreadPriority - 1));
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os::StartThread(std::addressof(g_multicore_thread));
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g_multicore_started = true;
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}
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}
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}
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Result HardwareBreakPoint::Clear(DebugProcess *debug_process) {
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Result result = svc::ResultInvalidArgument();
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if (m_in_use) {
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AMS_DMNT2_GDB_LOG_DEBUG("HardwareBreakPoint::Clear %p 0x%lx\n", this, m_address);
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result = HardwareBreakPointManager::SetExecutionBreakPoint(m_reg, m_ctx, 0);
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this->Reset();
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}
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return result;
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}
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Result HardwareBreakPoint::Set(DebugProcess *debug_process, uintptr_t address, size_t size, bool is_step) {
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/* Set fields. */
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m_is_step = is_step;
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m_address = address;
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m_size = size;
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/* Set context breakpoint. */
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R_TRY(HardwareBreakPointManager::SetContextBreakPoint(m_ctx, debug_process));
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/* Set execution breakpoint. */
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R_TRY(HardwareBreakPointManager::SetExecutionBreakPoint(m_reg, m_ctx, address));
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/* Set as in-use. */
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m_in_use = true;
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return ResultSuccess();
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}
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HardwareBreakPointManager::HardwareBreakPointManager(DebugProcess *debug_process) : BreakPointManager(debug_process) {
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/* Determine the number of breakpoint registers. */
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CountBreakPointRegisters();
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/* Initialize all breakpoints. */
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for (size_t i = 0; i < util::size(m_breakpoints); ++i) {
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m_breakpoints[i].Initialize(static_cast<svc::HardwareBreakPointRegisterName>(svc::HardwareBreakPointRegisterName_I0 + i), static_cast<svc::HardwareBreakPointRegisterName>(g_first_bp_ctx_register));
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}
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}
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BreakPointBase *HardwareBreakPointManager::GetBreakPoint(size_t index) {
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if (index < util::size(m_breakpoints)) {
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return m_breakpoints + index;
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} else {
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return nullptr;
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}
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}
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Result HardwareBreakPointManager::SetHardwareBreakPoint(u32 r, u64 dbgbcr, u64 value) {
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/* Send request. */
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const uintptr_t request[4] = {
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1,
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r,
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dbgbcr,
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value
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};
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R_UNLESS(SendMultiCoreRequest(request), dmnt::ResultUnknown());
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return ResultSuccess();
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}
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Result HardwareBreakPointManager::SetContextBreakPoint(svc::HardwareBreakPointRegisterName ctx, DebugProcess *debug_process) {
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/* Encode the register. */
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const u64 dbgbcr = (0x3 << 20) | (0 << 16) | (0xF << 5) | 1;
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const Result result = SetHardwareBreakPoint(ctx, dbgbcr, debug_process->GetHandle());
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if (R_FAILED(result)) {
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AMS_DMNT2_GDB_LOG_ERROR("SetContextBreakPoint FAIL 0x%08x ctx=%d\n", result.GetValue(), ctx);
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}
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return result;
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}
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svc::HardwareBreakPointRegisterName HardwareBreakPointManager::GetWatchPointContextRegister() {
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CountBreakPointRegisters();
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return static_cast<svc::HardwareBreakPointRegisterName>(g_first_bp_ctx_register + 1);
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}
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Result HardwareBreakPointManager::SetExecutionBreakPoint(svc::HardwareBreakPointRegisterName reg, svc::HardwareBreakPointRegisterName ctx, u64 address) {
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/* Encode the register. */
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const u64 dbgbcr = (0x1 << 20) | (ctx << 16) | (0xF << 5) | ((address != 0) ? 1 : 0);
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const Result result = SetHardwareBreakPoint(reg, dbgbcr, address);
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if (R_FAILED(result)) {
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AMS_DMNT2_GDB_LOG_ERROR("SetContextBreakPoint FAIL 0x%08x reg=%d, ctx=%d, address=%lx\n", result.GetValue(), reg, ctx, address);
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}
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return result;
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}
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void HardwareBreakPointManager::CountBreakPointRegisters() {
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/* Determine the valid breakpoint extents. */
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if (g_last_bp_ctx_register == -1) {
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/* Keep setting until we see a failure. */
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for (int i = svc::HardwareBreakPointRegisterName_I0; i <= static_cast<int>(svc::HardwareBreakPointRegisterName_I15); ++i) {
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if (R_FAILED(svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(i), 0, 0))) {
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break;
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}
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g_last_bp_register = i;
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}
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AMS_DMNT2_GDB_LOG_DEBUG("Last valid breakpoint=%d\n", g_last_bp_register);
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/* Determine the context register range. */
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const u64 dbgbcr = (0x3 << 20) | (0x0 << 16) | (0xF << 5) | 1;
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g_last_bp_ctx_register = g_last_bp_register;
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for (int i = g_last_bp_ctx_register; i >= static_cast<int>(svc::HardwareBreakPointRegisterName_I0); --i) {
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const Result result = svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(i), dbgbcr, svc::PseudoHandle::CurrentProcess);
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svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(i), 0, 0);
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if (R_FAILED(result)) {
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if (!svc::ResultInvalidHandle::Includes(result)) {
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break;
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}
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}
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g_first_bp_ctx_register = i;
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}
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AMS_DMNT2_GDB_LOG_DEBUG("Context BreakPoints = %d-%d\n", g_first_bp_ctx_register, g_last_bp_ctx_register);
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/* Determine valid watchpoint registers. */
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for (int i = svc::HardwareBreakPointRegisterName_D0; i <= static_cast<int>(svc::HardwareBreakPointRegisterName_D15); ++i) {
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if (R_FAILED(svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(i), 0, 0))) {
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break;
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}
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g_last_wp_register = i - svc::HardwareBreakPointRegisterName_D0;
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}
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AMS_DMNT2_GDB_LOG_DEBUG("Last valid watchpoint=%d\n", g_last_wp_register);
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}
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}
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bool HardwareBreakPointManager::SendMultiCoreRequest(const void *request) {
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/* Ensure the multi core thread is active. */
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EnsureMultiCoreStarted();
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/* Send the request. */
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os::SendMessageQueue(std::addressof(g_multicore_request_queue), reinterpret_cast<uintptr_t>(request));
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/* Get the response. */
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uintptr_t response;
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os::ReceiveMessageQueue(std::addressof(response), std::addressof(g_multicore_response_queue));
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return static_cast<bool>(response);
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}
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}
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