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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/diagnostics/eh-frame.h"
namespace v8 {
namespace internal {
static const int kR0DwarfCode = 0;
static const int kFpDwarfCode = 11;
static const int kSpDwarfCode = 13;
static const int kLrDwarfCode = 14;
const int EhFrameConstants::kCodeAlignmentFactor = 4;
const int EhFrameConstants::kDataAlignmentFactor = -4;
void EhFrameWriter::WriteReturnAddressRegisterCode() {
WriteULeb128(kLrDwarfCode);
}
void EhFrameWriter::WriteInitialStateInCie() {
SetBaseAddressRegisterAndOffset(fp, 0);
RecordRegisterNotModified(lr);
}
// static
int EhFrameWriter::RegisterToDwarfCode(Register name) {
switch (name.code()) {
case kRegCode_fp:
return kFpDwarfCode;
case kRegCode_sp:
return kSpDwarfCode;
case kRegCode_lr:
return kLrDwarfCode;
case kRegCode_r0:
return kR0DwarfCode;
default:
UNIMPLEMENTED();
return -1;
}
}
#ifdef ENABLE_DISASSEMBLER
// static
const char* EhFrameDisassembler::DwarfRegisterCodeToString(int code) {
switch (code) {
case kFpDwarfCode:
return "fp";
case kSpDwarfCode:
return "sp";
case kLrDwarfCode:
return "lr";
default:
UNIMPLEMENTED();
return nullptr;
}
}
#endif
} // namespace internal
} // namespace v8
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