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A64: Add Step

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Allow for stepping instruction-by-instruction
This commit is contained in:
MerryMage 2020-04-06 15:05:50 +01:00
parent 53e23efcef
commit f69c77391e
11 changed files with 108 additions and 32 deletions
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47
src/backend/x64/a64_interface.cpp
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@ -54,13 +54,28 @@ public:
// TODO: Check code alignment
const u32 new_rsb_ptr = (jit_state.rsb_ptr - 1) & A64JitState::RSBPtrMask;
if (jit_state.GetUniqueHash() == jit_state.rsb_location_descriptors[new_rsb_ptr]) {
jit_state.rsb_ptr = new_rsb_ptr;
block_of_code.RunCodeFrom(&jit_state, reinterpret_cast<CodePtr>(jit_state.rsb_codeptrs[new_rsb_ptr]));
} else {
block_of_code.RunCode(&jit_state);
}
const CodePtr current_code_ptr = [this]{
// RSB optimization
const u32 new_rsb_ptr = (jit_state.rsb_ptr - 1) & A64JitState::RSBPtrMask;
if (jit_state.GetUniqueHash() == jit_state.rsb_location_descriptors[new_rsb_ptr]) {
jit_state.rsb_ptr = new_rsb_ptr;
return reinterpret_cast<CodePtr>(jit_state.rsb_codeptrs[new_rsb_ptr]);
}
return GetCurrentBlock();
}();
block_of_code.RunCodeFrom(&jit_state, current_code_ptr);
PerformRequestedCacheInvalidation();
}
void Step() {
ASSERT(!is_executing);
is_executing = true;
SCOPE_EXIT { this->is_executing = false; };
jit_state.halt_requested = true;
block_of_code.StepCode(&jit_state, GetCurrentSingleStep());
PerformRequestedCacheInvalidation();
}
@ -185,9 +200,19 @@ private:
return this_->GetCurrentBlock();
}
CodePtr GetCurrentBlock() {
IR::LocationDescriptor current_location{jit_state.GetUniqueHash()};
IR::LocationDescriptor GetCurrentLocation() const {
return IR::LocationDescriptor{jit_state.GetUniqueHash()};
}
CodePtr GetCurrentBlock() {
return GetBlock(GetCurrentLocation());
}
CodePtr GetCurrentSingleStep() {
return GetBlock(A64::LocationDescriptor{GetCurrentLocation()}.SetSingleStepping(true));
}
CodePtr GetBlock(IR::LocationDescriptor current_location) {
if (auto block = emitter.GetBasicBlock(current_location))
return block->entrypoint;
@ -256,6 +281,10 @@ void Jit::Run() {
impl->Run();
}
void Jit::Step() {
impl->Step();
}
void Jit::ClearCache() {
impl->ClearCache();
}