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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/codegen/s390/assembler-s390-inl.h"
#include "src/diagnostics/eh-frame.h"
namespace v8 {
namespace internal {
static const int kR0DwarfCode = 0;
static const int kFpDwarfCode = 11; // frame-pointer
static const int kR14DwarfCode = 14; // return-address(lr)
static const int kSpDwarfCode = 15; // stack-pointer
const int EhFrameConstants::kCodeAlignmentFactor = 2; // 1 or 2 in s390
const int EhFrameConstants::kDataAlignmentFactor = -8;
void EhFrameWriter::WriteReturnAddressRegisterCode() {
WriteULeb128(kR14DwarfCode);
}
void EhFrameWriter::WriteInitialStateInCie() {
SetBaseAddressRegisterAndOffset(fp, 0);
RecordRegisterNotModified(r14);
}
// static
int EhFrameWriter::RegisterToDwarfCode(Register name) {
switch (name.code()) {
case kRegCode_fp:
return kFpDwarfCode;
case kRegCode_r14:
return kR14DwarfCode;
case kRegCode_sp:
return kSpDwarfCode;
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 kR14DwarfCode:
return "lr";
case kSpDwarfCode:
return "sp";
default:
UNIMPLEMENTED();
return nullptr;
}
}
#endif
} // namespace internal
} // namespace v8
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