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core: refactor emulated cpu core activation
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@liamwhite
liamwhite committed Dec 4, 2023
1 parent 90e87c4 commit 45c87c7
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Showing 47 changed files with 2,927 additions and 3,275 deletions.
2 changes: 1 addition & 1 deletion .codespellrc
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[codespell]
skip = ./.git,./build,./dist,./Doxyfile,./externals,./LICENSES,./src/android/app/src/main/res
ignore-words-list = aci,allright,ba,canonicalizations,deques,froms,hda,inout,lod,masia,nam,nax,nce,nd,optin,pullrequests,pullrequest,te,transfered,unstall,uscaled,vas,zink
ignore-words-list = aci,allright,ba,canonicalizations,deques,fpr,froms,hda,inout,lod,masia,nam,nax,nce,nd,optin,pullrequests,pullrequest,te,transfered,unstall,uscaled,vas,zink
2 changes: 2 additions & 0 deletions src/core/CMakeLists.txt
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add_library(core STATIC
arm/arm_interface.h
arm/arm_interface.cpp
arm/debug.cpp
arm/debug.h
arm/exclusive_monitor.cpp
arm/exclusive_monitor.h
arm/symbols.cpp
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217 changes: 9 additions & 208 deletions src/core/arm/arm_interface.cpp
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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include <map>
#include <optional>

#include "common/bit_field.h"
#include "common/common_types.h"
#include "common/demangle.h"
#include "common/logging/log.h"
#include "core/arm/arm_interface.h"
#include "core/arm/symbols.h"
#include "core/arm/debug.h"
#include "core/core.h"
#include "core/debugger/debugger.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_thread.h"
#include "core/hle/kernel/svc.h"
#include "core/loader/loader.h"
#include "core/memory.h"

namespace Core {

constexpr u64 SEGMENT_BASE = 0x7100000000ull;

std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktraceFromContext(
Core::System& system, const ARM_Interface::ThreadContext32& ctx) {
std::vector<BacktraceEntry> out;
auto& memory = system.ApplicationMemory();

const auto& reg = ctx.cpu_registers;
u32 pc = reg[15], lr = reg[14], fp = reg[11];
out.push_back({"", 0, pc, 0, ""});

// fp (= r11) points to the last frame record.
// Frame records are two words long:
// fp+0 : pointer to previous frame record
// fp+4 : value of lr for frame
for (size_t i = 0; i < 256; i++) {
out.push_back({"", 0, lr, 0, ""});
if (!fp || (fp % 4 != 0) || !memory.IsValidVirtualAddressRange(fp, 8)) {
break;
}
lr = memory.Read32(fp + 4);
fp = memory.Read32(fp);
}

SymbolicateBacktrace(system, out);

return out;
}

std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktraceFromContext(
Core::System& system, const ARM_Interface::ThreadContext64& ctx) {
std::vector<BacktraceEntry> out;
auto& memory = system.ApplicationMemory();

const auto& reg = ctx.cpu_registers;
u64 pc = ctx.pc, lr = reg[30], fp = reg[29];

out.push_back({"", 0, pc, 0, ""});

// fp (= x29) points to the previous frame record.
// Frame records are two words long:
// fp+0 : pointer to previous frame record
// fp+8 : value of lr for frame
for (size_t i = 0; i < 256; i++) {
out.push_back({"", 0, lr, 0, ""});
if (!fp || (fp % 4 != 0) || !memory.IsValidVirtualAddressRange(fp, 16)) {
break;
}
lr = memory.Read64(fp + 8);
fp = memory.Read64(fp);
}

SymbolicateBacktrace(system, out);

return out;
}

void ARM_Interface::SymbolicateBacktrace(Core::System& system, std::vector<BacktraceEntry>& out) {
std::map<VAddr, std::string> modules;
auto& loader{system.GetAppLoader()};
if (loader.ReadNSOModules(modules) != Loader::ResultStatus::Success) {
return;
}

std::map<std::string, Symbols::Symbols> symbols;
for (const auto& module : modules) {
symbols.insert_or_assign(module.second,
Symbols::GetSymbols(module.first, system.ApplicationMemory(),
system.ApplicationProcess()->Is64Bit()));
}

for (auto& entry : out) {
VAddr base = 0;
for (auto iter = modules.rbegin(); iter != modules.rend(); ++iter) {
const auto& module{*iter};
if (entry.original_address >= module.first) {
entry.module = module.second;
base = module.first;
break;
}
}

entry.offset = entry.original_address - base;
entry.address = SEGMENT_BASE + entry.offset;

if (entry.module.empty()) {
entry.module = "unknown";
}

const auto symbol_set = symbols.find(entry.module);
if (symbol_set != symbols.end()) {
const auto symbol = Symbols::GetSymbolName(symbol_set->second, entry.offset);
if (symbol) {
entry.name = Common::DemangleSymbol(*symbol);
}
}
}
}

std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktrace() const {
if (GetArchitecture() == Architecture::Aarch64) {
ThreadContext64 ctx;
SaveContext(ctx);
return GetBacktraceFromContext(system, ctx);
} else {
ThreadContext32 ctx;
SaveContext(ctx);
return GetBacktraceFromContext(system, ctx);
}
}
void ArmInterface::LogBacktrace(const Kernel::KProcess* process) const {
Kernel::Svc::ThreadContext ctx;
this->GetContext(ctx);

void ARM_Interface::LogBacktrace() const {
const VAddr sp = GetSP();
const VAddr pc = GetPC();
LOG_ERROR(Core_ARM, "Backtrace, sp={:016X}, pc={:016X}", sp, pc);
LOG_ERROR(Core_ARM, "Backtrace, sp={:016X}, pc={:016X}", ctx.sp, ctx.pc);
LOG_ERROR(Core_ARM, "{:20}{:20}{:20}{:20}{}", "Module Name", "Address", "Original Address",
"Offset", "Symbol");
LOG_ERROR(Core_ARM, "");
const auto backtrace = GetBacktrace();
const auto backtrace = GetBacktraceFromContext(process, ctx);
for (const auto& entry : backtrace) {
LOG_ERROR(Core_ARM, "{:20}{:016X} {:016X} {:016X} {}", entry.module, entry.address,
entry.original_address, entry.offset, entry.name);
}
}

void ARM_Interface::Run() {
using Kernel::StepState;
using Kernel::SuspendType;

while (true) {
Kernel::KThread* current_thread{Kernel::GetCurrentThreadPointer(system.Kernel())};
HaltReason hr{};

// If the thread is scheduled for termination, exit the thread.
if (current_thread->HasDpc()) {
if (current_thread->IsTerminationRequested()) {
current_thread->Exit();
UNREACHABLE();
}
}

// Notify the debugger and go to sleep if a step was performed
// and this thread has been scheduled again.
if (current_thread->GetStepState() == StepState::StepPerformed) {
system.GetDebugger().NotifyThreadStopped(current_thread);
current_thread->RequestSuspend(SuspendType::Debug);
break;
}

// Otherwise, run the thread.
system.EnterCPUProfile();
if (current_thread->GetStepState() == StepState::StepPending) {
hr = StepJit();

if (True(hr & HaltReason::StepThread)) {
current_thread->SetStepState(StepState::StepPerformed);
}
} else {
hr = RunJit();
}
system.ExitCPUProfile();

// Notify the debugger and go to sleep if a breakpoint was hit,
// or if the thread is unable to continue for any reason.
if (True(hr & HaltReason::InstructionBreakpoint) || True(hr & HaltReason::PrefetchAbort)) {
if (!True(hr & HaltReason::PrefetchAbort)) {
RewindBreakpointInstruction();
}
if (system.DebuggerEnabled()) {
system.GetDebugger().NotifyThreadStopped(current_thread);
} else {
LogBacktrace();
}
current_thread->RequestSuspend(SuspendType::Debug);
break;
}

// Notify the debugger and go to sleep if a watchpoint was hit.
if (True(hr & HaltReason::DataAbort)) {
if (system.DebuggerEnabled()) {
system.GetDebugger().NotifyThreadWatchpoint(current_thread, *HaltedWatchpoint());
} else {
LogBacktrace();
}
current_thread->RequestSuspend(SuspendType::Debug);
break;
}

// Handle syscalls and scheduling (this may change the current thread/core)
if (True(hr & HaltReason::SupervisorCall)) {
Kernel::Svc::Call(system, GetSvcNumber());
break;
}
if (True(hr & HaltReason::BreakLoop) || !uses_wall_clock) {
break;
}
}
}

void ARM_Interface::LoadWatchpointArray(const WatchpointArray* wp) {
watchpoints = wp;
}

const Kernel::DebugWatchpoint* ARM_Interface::MatchingWatchpoint(
const Kernel::DebugWatchpoint* ArmInterface::MatchingWatchpoint(
u64 addr, u64 size, Kernel::DebugWatchpointType access_type) const {
if (!watchpoints) {
if (!m_watchpoints) {
return nullptr;
}

const u64 start_address{addr};
const u64 end_address{addr + size};

for (size_t i = 0; i < Core::Hardware::NUM_WATCHPOINTS; i++) {
const auto& watch{(*watchpoints)[i]};
const auto& watch{(*m_watchpoints)[i]};

if (end_address <= GetInteger(watch.start_address)) {
continue;
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