llvm-project/llvm/lib/MC/MCObjectWriter.cpp

50 lines
1.6 KiB
C++

//===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSymbol.h"
using namespace llvm;
MCObjectWriter::~MCObjectWriter() {
}
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();
if (SA.isUndefined() || SB.isUndefined())
return false;
if (!SA.getFragment() || !SB.getFragment())
return false;
return IsSymbolRefDifferenceFullyResolvedImpl(Asm, SA, *SB.getFragment(),
InSet, 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;
}
bool MCObjectWriter::isWeak(const MCSymbol &) const { return false; }