xenia/src/xenia/cpu/backend/x64/x64_assembler.cc

131 lines
3.7 KiB
C++

/**
******************************************************************************
* Xenia : Xbox 360 Emulator Research Project *
******************************************************************************
* Copyright 2013 Ben Vanik. All rights reserved. *
* Released under the BSD license - see LICENSE in the root for more details. *
******************************************************************************
*/
#include "xenia/cpu/backend/x64/x64_assembler.h"
#include "xenia/base/reset_scope.h"
#include "xenia/cpu/backend/x64/x64_backend.h"
#include "xenia/cpu/backend/x64/x64_emitter.h"
#include "xenia/cpu/backend/x64/x64_function.h"
#include "xenia/cpu/hir/hir_builder.h"
#include "xenia/cpu/hir/label.h"
#include "xenia/cpu/processor.h"
#include "xenia/profiling.h"
namespace BE {
#include <beaengine/BeaEngine.h>
} // namespace BE
namespace xe {
namespace cpu {
namespace backend {
namespace x64 {
// TODO(benvanik): remove when enums redefined.
using namespace xe::cpu;
using xe::cpu::hir::HIRBuilder;
X64Assembler::X64Assembler(X64Backend* backend)
: Assembler(backend), x64_backend_(backend) {}
X64Assembler::~X64Assembler() {
// Emitter must be freed before the allocator.
emitter_.reset();
allocator_.reset();
}
bool X64Assembler::Initialize() {
if (!Assembler::Initialize()) {
return false;
}
allocator_.reset(new XbyakAllocator());
emitter_.reset(new X64Emitter(x64_backend_, allocator_.get()));
return true;
}
void X64Assembler::Reset() {
string_buffer_.Reset();
Assembler::Reset();
}
bool X64Assembler::Assemble(FunctionInfo* symbol_info, HIRBuilder* builder,
uint32_t debug_info_flags,
std::unique_ptr<DebugInfo> debug_info,
Function** out_function) {
SCOPE_profile_cpu_f("cpu");
// Reset when we leave.
xe::make_reset_scope(this);
// Lower HIR -> x64.
void* machine_code = nullptr;
size_t code_size = 0;
if (!emitter_->Emit(builder, debug_info_flags, debug_info.get(), machine_code,
code_size)) {
return false;
}
// Stash generated machine code.
if (debug_info_flags & DebugInfoFlags::kDebugInfoDisasmMachineCode) {
DumpMachineCode(debug_info.get(), machine_code, code_size, &string_buffer_);
debug_info->set_machine_code_disasm(string_buffer_.ToString());
string_buffer_.Reset();
}
{
X64Function* fn = new X64Function(symbol_info);
fn->set_debug_info(std::move(debug_info));
fn->Setup(machine_code, code_size);
*out_function = fn;
}
return true;
}
void X64Assembler::DumpMachineCode(DebugInfo* debug_info, void* machine_code,
size_t code_size, StringBuffer* str) {
BE::DISASM disasm = {0};
disasm.Archi = 64;
disasm.Options = BE::Tabulation + BE::MasmSyntax + BE::PrefixedNumeral;
disasm.EIP = (BE::UIntPtr)machine_code;
BE::UIntPtr eip_end = disasm.EIP + code_size;
uint64_t prev_source_offset = 0;
while (disasm.EIP < eip_end) {
// Look up source offset.
auto map_entry = debug_info->LookupCodeOffset(
static_cast<uint32_t>(disasm.EIP - (BE::UIntPtr)machine_code));
if (map_entry) {
if (map_entry->source_offset == prev_source_offset) {
str->Append(" ");
} else {
str->Append("%.8X ", map_entry->source_offset);
prev_source_offset = map_entry->source_offset;
}
} else {
str->Append("? ");
}
size_t len = BE::Disasm(&disasm);
if (len == BE::UNKNOWN_OPCODE) {
break;
}
str->Append("%p %s\n", disasm.EIP, disasm.CompleteInstr);
disasm.EIP += len;
}
}
} // namespace x64
} // namespace backend
} // namespace cpu
} // namespace xe