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//===- MCAsmBackend.cpp - Target MC Assembly Backend ----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/MC/MCCodePadder.h"
#include "llvm/MC/MCFixupKindInfo.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
using namespace llvm;
MCAsmBackend::MCAsmBackend() : CodePadder(new MCCodePadder()) {}
MCAsmBackend::MCAsmBackend(std::unique_ptr<MCCodePadder> TargetCodePadder)
: CodePadder(std::move(TargetCodePadder)) {}
MCAsmBackend::~MCAsmBackend() = default;
Optional<MCFixupKind> MCAsmBackend::getFixupKind(StringRef Name) const {
return None;
}
const MCFixupKindInfo &MCAsmBackend::getFixupKindInfo(MCFixupKind Kind) const {
static const MCFixupKindInfo Builtins[] = {
{"FK_Data_1", 0, 8, 0},
{"FK_Data_2", 0, 16, 0},
{"FK_Data_4", 0, 32, 0},
{"FK_Data_8", 0, 64, 0},
{"FK_PCRel_1", 0, 8, MCFixupKindInfo::FKF_IsPCRel},
{"FK_PCRel_2", 0, 16, MCFixupKindInfo::FKF_IsPCRel},
{"FK_PCRel_4", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
{"FK_PCRel_8", 0, 64, MCFixupKindInfo::FKF_IsPCRel},
{"FK_GPRel_1", 0, 8, 0},
{"FK_GPRel_2", 0, 16, 0},
{"FK_GPRel_4", 0, 32, 0},
{"FK_GPRel_8", 0, 64, 0},
{"FK_DTPRel_4", 0, 32, 0},
{"FK_DTPRel_8", 0, 64, 0},
{"FK_TPRel_4", 0, 32, 0},
{"FK_TPRel_8", 0, 64, 0},
{"FK_SecRel_1", 0, 8, 0},
{"FK_SecRel_2", 0, 16, 0},
{"FK_SecRel_4", 0, 32, 0},
{"FK_SecRel_8", 0, 64, 0}};
assert((size_t)Kind <= array_lengthof(Builtins) && "Unknown fixup kind");
return Builtins[Kind];
}
bool MCAsmBackend::fixupNeedsRelaxationAdvanced(
const MCFixup &Fixup, bool Resolved, uint64_t Value,
const MCRelaxableFragment *DF, const MCAsmLayout &Layout) const {
if (!Resolved)
return true;
return fixupNeedsRelaxation(Fixup, Value, DF, Layout);
}
void MCAsmBackend::handleCodePaddingBasicBlockStart(
MCObjectStreamer *OS, const MCCodePaddingContext &Context) {
CodePadder->handleBasicBlockStart(OS, Context);
}
void MCAsmBackend::handleCodePaddingBasicBlockEnd(
const MCCodePaddingContext &Context) {
CodePadder->handleBasicBlockEnd(Context);
}
void MCAsmBackend::handleCodePaddingInstructionBegin(const MCInst &Inst) {
CodePadder->handleInstructionBegin(Inst);
}
void MCAsmBackend::handleCodePaddingInstructionEnd(const MCInst &Inst) {
CodePadder->handleInstructionEnd(Inst);
}
bool MCAsmBackend::relaxFragment(MCPaddingFragment *PF, MCAsmLayout &Layout) {
return CodePadder->relaxFragment(PF, Layout);
}
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