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Merge pull request #2240 from FearlessTobi/port-4651 

Port citra-emu/citra#4651: "gdbstub: Fix some bugs in IsMemoryBreak() and ServeBreak. Add workaround to let watchpoints break into GDB."
This commit is contained in:
bunnei 2019-04-05 23:46:37 -04:00 committed by GitHub
parent e3402d976d 0e7ad1c367
commit 54c7e8e40e
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 5 additions and 4 deletions
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5
src/core/arm/unicorn/arm_unicorn.cpp
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@ -192,12 +192,13 @@ void ARM_Unicorn::ExecuteInstructions(int num_instructions) {
CHECKED(uc_emu_start(uc, GetPC(), 1ULL << 63, 0, num_instructions));
core_timing.AddTicks(num_instructions);
if (GDBStub::IsServerEnabled()) {
if (last_bkpt_hit) {
if (last_bkpt_hit && last_bkpt.type == GDBStub::BreakpointType::Execute) {
uc_reg_write(uc, UC_ARM64_REG_PC, &last_bkpt.address);
}
Kernel::Thread* thread = Kernel::GetCurrentThread();
SaveContext(thread->GetContext());
if (last_bkpt_hit || GDBStub::GetCpuStepFlag()) {
if (last_bkpt_hit || GDBStub::IsMemoryBreak() || GDBStub::GetCpuStepFlag()) {
last_bkpt_hit = false;
GDBStub::Break();
GDBStub::SendTrap(thread, 5);

2
src/core/arm/unicorn/arm_unicorn.h
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@ -50,7 +50,7 @@ private:
uc_engine* uc{};
Timing::CoreTiming& core_timing;
GDBStub::BreakpointAddress last_bkpt{};
bool last_bkpt_hit;
bool last_bkpt_hit = false;
};
} // namespace Core

2
src/core/gdbstub/gdbstub.cpp
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@ -1030,7 +1030,7 @@ static void Step() {
/// Tell the CPU if we hit a memory breakpoint.
bool IsMemoryBreak() {
if (IsConnected()) {
if (!IsConnected()) {
return false;
}