fabi/Xenia-Canary
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Rewriting code cache to put everything at fixed addresses.

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This commit is contained in:
Ben Vanik
2015-05-20 19:23:46 -07:00
parent 20a3172ebb
commit 5e5eb47789
14 changed files with 360 additions and 408 deletions
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13
src/xenia/cpu/backend/x64/x64_emitter.cc
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@@ -87,9 +87,9 @@ X64Emitter::X64Emitter(X64Backend* backend, XbyakAllocator* allocator)
X64Emitter::~X64Emitter() = default;
bool X64Emitter::Emit(HIRBuilder* builder, uint32_t debug_info_flags,
DebugInfo* debug_info, void*& out_code_address,
size_t& out_code_size) {
bool X64Emitter::Emit(uint32_t guest_address, HIRBuilder* builder,
uint32_t debug_info_flags, DebugInfo* debug_info,
void*& out_code_address, size_t& out_code_size) {
SCOPE_profile_cpu_f("cpu");
// Reset.
@@ -108,7 +108,7 @@ bool X64Emitter::Emit(HIRBuilder* builder, uint32_t debug_info_flags,
// Copy the final code to the cache and relocate it.
out_code_size = getSize();
out_code_address = Emplace(stack_size);
out_code_address = Emplace(guest_address, stack_size);
// Stash source map.
if (debug_info_flags_ & DebugInfoFlags::kDebugInfoSourceMap) {
@@ -119,13 +119,14 @@ bool X64Emitter::Emit(HIRBuilder* builder, uint32_t debug_info_flags,
return true;
}
void* X64Emitter::Emplace(size_t stack_size) {
void* X64Emitter::Emplace(uint32_t guest_address, size_t stack_size) {
// To avoid changing xbyak, we do a switcharoo here.
// top_ points to the Xbyak buffer, and since we are in AutoGrow mode
// it has pending relocations. We copy the top_ to our buffer, swap the
// pointer, relocate, then return the original scratch pointer for use.
uint8_t* old_address = top_;
void* new_address = code_cache_->PlaceCode(top_, size_, stack_size);
void* new_address =
code_cache_->PlaceCode(guest_address, top_, size_, stack_size);
top_ = (uint8_t*)new_address;
ready();
top_ = old_address;