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//===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFragment.h"
#include "llvm/MC/MCSymbol.h"
namespace llvm {
class MCSection;
}
using namespace llvm;
MCObjectWriter::~MCObjectWriter() = default;
void MCObjectWriter::reset() {
FileNames.clear();
AddrsigSyms.clear();
EmitAddrsigSection = false;
SubsectionsViaSymbols = false;
CGProfile.clear();
}
bool MCObjectWriter::isSymbolRefDifferenceFullyResolved(
const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B,
bool InSet) const {
// Modified symbol references cannot be resolved.
if (A->getKind() != MCSymbolRefExpr::VK_None ||
B->getKind() != MCSymbolRefExpr::VK_None)
return false;
const MCSymbol &SA = A->getSymbol();
const MCSymbol &SB = B->getSymbol();
assert(!SA.isUndefined() && !SB.isUndefined());
MCFragment *FB = SB.getFragment();
if (!FB || !SA.getFragment())
return false;
return isSymbolRefDifferenceFullyResolvedImpl(Asm, SA, *FB, InSet, /*IsPCRel=*/false);
}
bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB,
bool InSet, bool IsPCRel) const {
const MCSection &SecA = SymA.getSection();
const MCSection &SecB = *FB.getParent();
// On ELF and COFF A - B is absolute if A and B are in the same section.
return &SecA == &SecB;
}
void MCObjectWriter::addFileName(MCAssembler &Asm, StringRef FileName) {
FileNames.emplace_back(std::string(FileName), Asm.Symbols.size());
}
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