56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
//===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCFragment.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCSymbol.h"
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using namespace llvm;
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MCObjectWriter::~MCObjectWriter() = default;
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bool MCObjectWriter::isSymbolRefDifferenceFullyResolved(
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const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B,
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bool InSet) const {
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// Modified symbol references cannot be resolved.
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if (A->getKind() != MCSymbolRefExpr::VK_None ||
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B->getKind() != MCSymbolRefExpr::VK_None)
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return false;
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const MCSymbol &SA = A->getSymbol();
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const MCSymbol &SB = B->getSymbol();
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if (SA.isUndefined() || SB.isUndefined())
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return false;
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if (!SA.getFragment() || !SB.getFragment())
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return false;
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return isSymbolRefDifferenceFullyResolvedImpl(Asm, SA, SB, InSet);
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}
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bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
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const MCAssembler &Asm, const MCSymbol &A, const MCSymbol &B,
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bool InSet) const {
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return isSymbolRefDifferenceFullyResolvedImpl(Asm, A, *B.getFragment(), InSet,
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false);
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}
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bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
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const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB,
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bool InSet, bool IsPCRel) const {
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const MCSection &SecA = SymA.getSection();
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const MCSection &SecB = *FB.getParent();
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// On ELF and COFF A - B is absolute if A and B are in the same section.
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return &SecA == &SecB;
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}
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bool MCObjectWriter::isWeak(const MCSymbol &) const { return false; }
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