mirror of
https://github.com/yuzu-emu/yuzu-android.git
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253 lines
8.1 KiB
C++
253 lines
8.1 KiB
C++
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <map>
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#include <optional>
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#include "common/bit_field.h"
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#include "common/common_types.h"
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#include "common/demangle.h"
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#include "common/logging/log.h"
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#include "core/arm/arm_interface.h"
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#include "core/arm/symbols.h"
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#include "core/core.h"
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#include "core/debugger/debugger.h"
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#include "core/hle/kernel/k_process.h"
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#include "core/hle/kernel/k_thread.h"
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#include "core/hle/kernel/svc.h"
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#include "core/loader/loader.h"
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#include "core/memory.h"
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namespace Core {
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constexpr u64 SEGMENT_BASE = 0x7100000000ull;
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std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktraceFromContext(
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Core::System& system, const ARM_Interface::ThreadContext32& ctx) {
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std::vector<BacktraceEntry> out;
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auto& memory = system.ApplicationMemory();
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const auto& reg = ctx.cpu_registers;
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u32 pc = reg[15], lr = reg[14], fp = reg[11];
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out.push_back({"", 0, pc, 0, ""});
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// fp (= r11) points to the last frame record.
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// Frame records are two words long:
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// fp+0 : pointer to previous frame record
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// fp+4 : value of lr for frame
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for (size_t i = 0; i < 256; i++) {
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out.push_back({"", 0, lr, 0, ""});
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if (!fp || (fp % 4 != 0) || !memory.IsValidVirtualAddressRange(fp, 8)) {
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break;
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}
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lr = memory.Read32(fp + 4);
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fp = memory.Read32(fp);
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}
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SymbolicateBacktrace(system, out);
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return out;
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}
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std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktraceFromContext(
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Core::System& system, const ARM_Interface::ThreadContext64& ctx) {
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std::vector<BacktraceEntry> out;
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auto& memory = system.ApplicationMemory();
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const auto& reg = ctx.cpu_registers;
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u64 pc = ctx.pc, lr = reg[30], fp = reg[29];
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out.push_back({"", 0, pc, 0, ""});
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// fp (= x29) points to the previous frame record.
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// Frame records are two words long:
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// fp+0 : pointer to previous frame record
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// fp+8 : value of lr for frame
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for (size_t i = 0; i < 256; i++) {
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out.push_back({"", 0, lr, 0, ""});
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if (!fp || (fp % 4 != 0) || !memory.IsValidVirtualAddressRange(fp, 16)) {
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break;
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}
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lr = memory.Read64(fp + 8);
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fp = memory.Read64(fp);
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}
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SymbolicateBacktrace(system, out);
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return out;
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}
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void ARM_Interface::SymbolicateBacktrace(Core::System& system, std::vector<BacktraceEntry>& out) {
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std::map<VAddr, std::string> modules;
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auto& loader{system.GetAppLoader()};
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if (loader.ReadNSOModules(modules) != Loader::ResultStatus::Success) {
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return;
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}
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std::map<std::string, Symbols::Symbols> symbols;
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for (const auto& module : modules) {
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symbols.insert_or_assign(module.second,
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Symbols::GetSymbols(module.first, system.ApplicationMemory(),
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system.ApplicationProcess()->Is64Bit()));
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}
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for (auto& entry : out) {
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VAddr base = 0;
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for (auto iter = modules.rbegin(); iter != modules.rend(); ++iter) {
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const auto& module{*iter};
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if (entry.original_address >= module.first) {
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entry.module = module.second;
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base = module.first;
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break;
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}
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}
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entry.offset = entry.original_address - base;
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entry.address = SEGMENT_BASE + entry.offset;
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if (entry.module.empty()) {
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entry.module = "unknown";
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}
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const auto symbol_set = symbols.find(entry.module);
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if (symbol_set != symbols.end()) {
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const auto symbol = Symbols::GetSymbolName(symbol_set->second, entry.offset);
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if (symbol) {
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entry.name = Common::DemangleSymbol(*symbol);
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}
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}
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}
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}
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std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktrace() const {
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if (GetArchitecture() == Architecture::Aarch64) {
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ThreadContext64 ctx;
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SaveContext(ctx);
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return GetBacktraceFromContext(system, ctx);
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} else {
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ThreadContext32 ctx;
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SaveContext(ctx);
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return GetBacktraceFromContext(system, ctx);
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}
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}
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void ARM_Interface::LogBacktrace() const {
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const VAddr sp = GetSP();
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const VAddr pc = GetPC();
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LOG_ERROR(Core_ARM, "Backtrace, sp={:016X}, pc={:016X}", sp, pc);
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LOG_ERROR(Core_ARM, "{:20}{:20}{:20}{:20}{}", "Module Name", "Address", "Original Address",
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"Offset", "Symbol");
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LOG_ERROR(Core_ARM, "");
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const auto backtrace = GetBacktrace();
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for (const auto& entry : backtrace) {
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LOG_ERROR(Core_ARM, "{:20}{:016X} {:016X} {:016X} {}", entry.module, entry.address,
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entry.original_address, entry.offset, entry.name);
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}
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}
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void ARM_Interface::Run() {
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using Kernel::StepState;
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using Kernel::SuspendType;
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while (true) {
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Kernel::KThread* current_thread{Kernel::GetCurrentThreadPointer(system.Kernel())};
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HaltReason hr{};
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// If the thread is scheduled for termination, exit the thread.
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if (current_thread->HasDpc()) {
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if (current_thread->IsTerminationRequested()) {
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current_thread->Exit();
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UNREACHABLE();
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}
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}
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// Notify the debugger and go to sleep if a step was performed
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// and this thread has been scheduled again.
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if (current_thread->GetStepState() == StepState::StepPerformed) {
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system.GetDebugger().NotifyThreadStopped(current_thread);
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current_thread->RequestSuspend(SuspendType::Debug);
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break;
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}
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// Otherwise, run the thread.
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system.EnterCPUProfile();
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if (current_thread->GetStepState() == StepState::StepPending) {
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hr = StepJit();
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if (True(hr & HaltReason::StepThread)) {
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current_thread->SetStepState(StepState::StepPerformed);
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}
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} else {
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hr = RunJit();
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}
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system.ExitCPUProfile();
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// Notify the debugger and go to sleep if a breakpoint was hit,
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// or if the thread is unable to continue for any reason.
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if (True(hr & HaltReason::InstructionBreakpoint) || True(hr & HaltReason::PrefetchAbort)) {
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if (!True(hr & HaltReason::PrefetchAbort)) {
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RewindBreakpointInstruction();
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}
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if (system.DebuggerEnabled()) {
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system.GetDebugger().NotifyThreadStopped(current_thread);
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} else {
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LogBacktrace();
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}
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current_thread->RequestSuspend(SuspendType::Debug);
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break;
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}
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// Notify the debugger and go to sleep if a watchpoint was hit.
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if (True(hr & HaltReason::DataAbort)) {
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if (system.DebuggerEnabled()) {
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system.GetDebugger().NotifyThreadWatchpoint(current_thread, *HaltedWatchpoint());
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}
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current_thread->RequestSuspend(SuspendType::Debug);
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break;
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}
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// Handle syscalls and scheduling (this may change the current thread/core)
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if (True(hr & HaltReason::SupervisorCall)) {
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Kernel::Svc::Call(system, GetSvcNumber());
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break;
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}
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if (True(hr & HaltReason::BreakLoop) || !uses_wall_clock) {
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break;
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}
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}
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}
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void ARM_Interface::LoadWatchpointArray(const WatchpointArray* wp) {
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watchpoints = wp;
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}
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const Kernel::DebugWatchpoint* ARM_Interface::MatchingWatchpoint(
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u64 addr, u64 size, Kernel::DebugWatchpointType access_type) const {
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if (!watchpoints) {
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return nullptr;
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}
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const u64 start_address{addr};
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const u64 end_address{addr + size};
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for (size_t i = 0; i < Core::Hardware::NUM_WATCHPOINTS; i++) {
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const auto& watch{(*watchpoints)[i]};
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if (end_address <= GetInteger(watch.start_address)) {
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continue;
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}
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if (start_address >= GetInteger(watch.end_address)) {
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continue;
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}
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if ((access_type & watch.type) == Kernel::DebugWatchpointType::None) {
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continue;
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}
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return &watch;
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}
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return nullptr;
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}
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} // namespace Core
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