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x64 backend: Pass guest return address as first argument to guest functions.

This commit is contained in:
Dr. Chat 2016-08-26 13:46:21 -05:00
parent 7683069f6c
commit 52c75c8dbc
2 changed files with 6 additions and 6 deletions
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2
src/xenia/cpu/backend/x64/x64_backend.cc
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@ -422,7 +422,7 @@ HostToGuestThunk X64ThunkEmitter::EmitHostToGuestThunk() {
mov(rax, rcx);
mov(rsi, rdx); // context
mov(rdx, r8);
mov(rcx, r8); // return address
call(rax);
movaps(xmm6, qword[rsp + offsetof(StackLayout::Thunk, xmm[0])]);

10
src/xenia/cpu/backend/x64/x64_emitter.cc
View File

@ -169,7 +169,7 @@ bool X64Emitter::Emit(HIRBuilder* builder, size_t* out_stack_size) {
stack_size_ = stack_size;
sub(rsp, (uint32_t)stack_size);
mov(qword[rsp + StackLayout::GUEST_CTX_HOME], GetContextReg());
mov(qword[rsp + StackLayout::GUEST_RET_ADDR], rdx);
mov(qword[rsp + StackLayout::GUEST_RET_ADDR], rcx);
mov(qword[rsp + StackLayout::GUEST_CALL_RET_ADDR], 0);
// Safe now to do some tracing.
@ -384,13 +384,13 @@ void X64Emitter::Call(const hir::Instr* instr, GuestFunction* function) {
EmitTraceUserCallReturn();
// Pass the callers return address over.
mov(rdx, qword[rsp + StackLayout::GUEST_RET_ADDR]);
mov(rcx, qword[rsp + StackLayout::GUEST_RET_ADDR]);
add(rsp, static_cast<uint32_t>(stack_size()));
jmp(rax);
} else {
// Return address is from the previous SET_RETURN_ADDRESS.
mov(rdx, qword[rsp + StackLayout::GUEST_CALL_RET_ADDR]);
mov(rcx, qword[rsp + StackLayout::GUEST_CALL_RET_ADDR]);
call(rax);
}
@ -427,13 +427,13 @@ void X64Emitter::CallIndirect(const hir::Instr* instr,
EmitTraceUserCallReturn();
// Pass the callers return address over.
mov(rdx, qword[rsp + StackLayout::GUEST_RET_ADDR]);
mov(rcx, qword[rsp + StackLayout::GUEST_RET_ADDR]);
add(rsp, static_cast<uint32_t>(stack_size()));
jmp(rax);
} else {
// Return address is from the previous SET_RETURN_ADDRESS.
mov(rdx, qword[rsp + StackLayout::GUEST_CALL_RET_ADDR]);
mov(rcx, qword[rsp + StackLayout::GUEST_CALL_RET_ADDR]);
call(rax);
}