forked from OSchip/llvm-project
57 lines
2.2 KiB
C++
57 lines
2.2 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/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() {
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}
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bool
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MCObjectWriter::IsSymbolRefDifferenceFullyResolved(const MCAssembler &Asm,
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const MCSymbolRefExpr *A,
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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.AliasedSymbol().isUndefined() || SB.AliasedSymbol().isUndefined())
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return false;
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const MCSymbolData &DataA = Asm.getSymbolData(SA);
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const MCSymbolData &DataB = Asm.getSymbolData(SB);
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if(!DataA.getFragment() || !DataB.getFragment())
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return false;
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return IsSymbolRefDifferenceFullyResolvedImpl(Asm, DataA,
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*DataB.getFragment(),
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InSet,
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false);
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}
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bool
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MCObjectWriter::IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
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const MCSymbolData &DataA,
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const MCFragment &FB,
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bool InSet,
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bool IsPCRel) const {
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const MCSection &SecA = DataA.getSymbol().AliasedSymbol().getSection();
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const MCSection &SecB = FB.getParent()->getSection();
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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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