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Merge pull request #8490 from liamwhite/read-code-stop

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dynarmic: Stop ReadCode callbacks to unmapped addresses
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Morph 2022-06-30 20:57:39 -07:00 committed by GitHub
commit 78ce053b4d
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 65 additions and 25 deletions
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2
externals/dynarmic vendored

@ -1 +1 @@
Subproject commit 5ad1d02351bf4fee681a3d701d210b419f41a505
Subproject commit 7f84870712ac2fe06aa62dc2bebbe46b51a2cc2e

13
src/core/arm/arm_interface.cpp
View file

@ -119,16 +119,23 @@ void ARM_Interface::Run() {
}
system.ExitDynarmicProfile();
// Notify the debugger and go to sleep if a breakpoint was hit.
if (Has(hr, breakpoint)) {
// Notify the debugger and go to sleep if a breakpoint was hit,
// or if the thread is unable to continue for any reason.
if (Has(hr, breakpoint) || Has(hr, no_execute)) {
RewindBreakpointInstruction();
if (system.DebuggerEnabled()) {
system.GetDebugger().NotifyThreadStopped(current_thread);
current_thread->RequestSuspend(SuspendType::Debug);
}
current_thread->RequestSuspend(Kernel::SuspendType::Debug);
break;
}
// Notify the debugger and go to sleep if a watchpoint was hit.
if (Has(hr, watchpoint)) {
RewindBreakpointInstruction();
if (system.DebuggerEnabled()) {
system.GetDebugger().NotifyThreadWatchpoint(current_thread, *HaltedWatchpoint());
}
current_thread->RequestSuspend(SuspendType::Debug);
break;
}

1
src/core/arm/arm_interface.h
View file

@ -204,6 +204,7 @@ public:
static constexpr Dynarmic::HaltReason svc_call = Dynarmic::HaltReason::UserDefined3;
static constexpr Dynarmic::HaltReason breakpoint = Dynarmic::HaltReason::UserDefined4;
static constexpr Dynarmic::HaltReason watchpoint = Dynarmic::HaltReason::UserDefined5;
static constexpr Dynarmic::HaltReason no_execute = Dynarmic::HaltReason::UserDefined6;
protected:
/// System context that this ARM interface is running under.

32
src/core/arm/dynarmic/arm_dynarmic_32.cpp
View file

@ -48,6 +48,12 @@ public:
CheckMemoryAccess(vaddr, 8, Kernel::DebugWatchpointType::Read);
return memory.Read64(vaddr);
}
std::optional<u32> MemoryReadCode(u32 vaddr) override {
if (!memory.IsValidVirtualAddressRange(vaddr, sizeof(u32))) {
return std::nullopt;
}
return MemoryRead32(vaddr);
}
void MemoryWrite8(u32 vaddr, u8 value) override {
if (CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Write)) {
@ -89,21 +95,28 @@ public:
void InterpreterFallback(u32 pc, std::size_t num_instructions) override {
parent.LogBacktrace();
UNIMPLEMENTED_MSG("This should never happen, pc = {:08X}, code = {:08X}", pc,
MemoryReadCode(pc));
LOG_ERROR(Core_ARM,
"Unimplemented instruction @ 0x{:X} for {} instructions (instr = {:08X})", pc,
num_instructions, MemoryRead32(pc));
}
void ExceptionRaised(u32 pc, Dynarmic::A32::Exception exception) override {
switch (exception) {
case Dynarmic::A32::Exception::NoExecuteFault:
LOG_CRITICAL(Core_ARM, "Cannot execute instruction at unmapped address {:#08x}", pc);
ReturnException(pc, ARM_Interface::no_execute);
return;
default:
if (debugger_enabled) {
parent.SaveContext(parent.breakpoint_context);
parent.jit.load()->HaltExecution(ARM_Interface::breakpoint);
ReturnException(pc, ARM_Interface::breakpoint);
return;
}
parent.LogBacktrace();
LOG_CRITICAL(Core_ARM,
"ExceptionRaised(exception = {}, pc = {:08X}, code = {:08X}, thumb = {})",
exception, pc, MemoryReadCode(pc), parent.IsInThumbMode());
exception, pc, MemoryRead32(pc), parent.IsInThumbMode());
}
}
void CallSVC(u32 swi) override {
@ -141,15 +154,20 @@ public:
const auto match{parent.MatchingWatchpoint(addr, size, type)};
if (match) {
parent.SaveContext(parent.breakpoint_context);
parent.jit.load()->HaltExecution(ARM_Interface::watchpoint);
parent.halted_watchpoint = match;
ReturnException(parent.jit.load()->Regs()[15], ARM_Interface::watchpoint);
return false;
}
return true;
}
void ReturnException(u32 pc, Dynarmic::HaltReason hr) {
parent.SaveContext(parent.breakpoint_context);
parent.breakpoint_context.cpu_registers[15] = pc;
parent.jit.load()->HaltExecution(hr);
}
ARM_Dynarmic_32& parent;
Core::Memory::Memory& memory;
std::size_t num_interpreted_instructions{};

28
src/core/arm/dynarmic/arm_dynarmic_64.cpp
View file

@ -52,6 +52,12 @@ public:
CheckMemoryAccess(vaddr, 16, Kernel::DebugWatchpointType::Read);
return {memory.Read64(vaddr), memory.Read64(vaddr + 8)};
}
std::optional<u32> MemoryReadCode(u64 vaddr) override {
if (!memory.IsValidVirtualAddressRange(vaddr, sizeof(u32))) {
return std::nullopt;
}
return MemoryRead32(vaddr);
}
void MemoryWrite8(u64 vaddr, u8 value) override {
if (CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Write)) {
@ -105,7 +111,7 @@ public:
parent.LogBacktrace();
LOG_ERROR(Core_ARM,
"Unimplemented instruction @ 0x{:X} for {} instructions (instr = {:08X})", pc,
num_instructions, MemoryReadCode(pc));
num_instructions, MemoryRead32(pc));
}
void InstructionCacheOperationRaised(Dynarmic::A64::InstructionCacheOperation op,
@ -138,16 +144,19 @@ public:
case Dynarmic::A64::Exception::SendEventLocal:
case Dynarmic::A64::Exception::Yield:
return;
case Dynarmic::A64::Exception::NoExecuteFault:
LOG_CRITICAL(Core_ARM, "Cannot execute instruction at unmapped address {:#016x}", pc);
ReturnException(pc, ARM_Interface::no_execute);
return;
default:
if (debugger_enabled) {
parent.SaveContext(parent.breakpoint_context);
parent.jit.load()->HaltExecution(ARM_Interface::breakpoint);
ReturnException(pc, ARM_Interface::breakpoint);
return;
}
parent.LogBacktrace();
ASSERT_MSG(false, "ExceptionRaised(exception = {}, pc = {:08X}, code = {:08X})",
static_cast<std::size_t>(exception), pc, MemoryReadCode(pc));
LOG_CRITICAL(Core_ARM, "ExceptionRaised(exception = {}, pc = {:08X}, code = {:08X})",
static_cast<std::size_t>(exception), pc, MemoryRead32(pc));
}
}
@ -188,15 +197,20 @@ public:
const auto match{parent.MatchingWatchpoint(addr, size, type)};
if (match) {
parent.SaveContext(parent.breakpoint_context);
parent.jit.load()->HaltExecution(ARM_Interface::watchpoint);
parent.halted_watchpoint = match;
ReturnException(parent.jit.load()->GetPC(), ARM_Interface::watchpoint);
return false;
}
return true;
}
void ReturnException(u64 pc, Dynarmic::HaltReason hr) {
parent.SaveContext(parent.breakpoint_context);
parent.breakpoint_context.pc = pc;
parent.jit.load()->HaltExecution(hr);
}
ARM_Dynarmic_64& parent;
Core::Memory::Memory& memory;
u64 tpidrro_el0 = 0;