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Making functions naked for now, as it makes life way easier.

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This commit is contained in:
Ben Vanik
2014-01-02 23:53:18 -08:00
parent 99c200fda5
commit 2468645bf2
2 changed files with 19 additions and 7 deletions
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14
src/alloy/backend/x64/x64_emitter.cc
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@@ -103,7 +103,7 @@ void* XbyakGenerator::Emplace(X64CodeCache* code_cache) {
int XbyakGenerator::Emit(LIRBuilder* builder) {
// Function prolog.
// Must be 16b aligned.
// Windows is very strict about the form of this and the eiplog:
// Windows is very strict about the form of this and the epilog:
// http://msdn.microsoft.com/en-us/library/tawsa7cb.aspx
// TODO(benvanik): save off non-volatile registers so we can use them:
// RBX, RBP, RDI, RSI, RSP, R12, R13, R14, R15
@@ -112,8 +112,12 @@ int XbyakGenerator::Emit(LIRBuilder* builder) {
// IMPORTANT: any changes to the prolog must be kept in sync with
// X64CodeCache, which dynamically generates exception information.
// Adding or changing anything here must be matched!
const bool emit_prolog = false;
const size_t stack_size = 16;
sub(rsp, stack_size);
if (emit_prolog) {
sub(rsp, stack_size);
// TODO(benvanik): save registers.
}
// Body.
auto block = builder->first_block();
@@ -145,8 +149,10 @@ int XbyakGenerator::Emit(LIRBuilder* builder) {
// Function epilog.
L("epilog");
add(rsp, stack_size);
// TODO(benvanik): restore registers.
if (emit_prolog) {
add(rsp, stack_size);
// TODO(benvanik): restore registers.
}
ret();
return 0;