1 //===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/MC/MCAssembler.h"
11 #include "llvm/MC/MCExpr.h"
12 #include "llvm/MC/MCObjectWriter.h"
13 #include "llvm/MC/MCSymbol.h"
14
15 using namespace llvm;
16
~MCObjectWriter()17 MCObjectWriter::~MCObjectWriter() {
18 }
19
IsSymbolRefDifferenceFullyResolved(const MCAssembler & Asm,const MCSymbolRefExpr * A,const MCSymbolRefExpr * B,bool InSet) const20 bool MCObjectWriter::IsSymbolRefDifferenceFullyResolved(
21 const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B,
22 bool InSet) const {
23 // Modified symbol references cannot be resolved.
24 if (A->getKind() != MCSymbolRefExpr::VK_None ||
25 B->getKind() != MCSymbolRefExpr::VK_None)
26 return false;
27
28 const MCSymbol &SA = A->getSymbol();
29 const MCSymbol &SB = B->getSymbol();
30 if (SA.isUndefined() || SB.isUndefined())
31 return false;
32
33 const MCSymbolData &DataA = Asm.getSymbolData(SA);
34 const MCSymbolData &DataB = Asm.getSymbolData(SB);
35 if(!DataA.getFragment() || !DataB.getFragment())
36 return false;
37
38 return IsSymbolRefDifferenceFullyResolvedImpl(
39 Asm, DataA, &DataB, *DataB.getFragment(), InSet, false);
40 }
41
IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler & Asm,const MCSymbolData & DataA,const MCSymbolData * DataB,const MCFragment & FB,bool InSet,bool IsPCRel) const42 bool MCObjectWriter::IsSymbolRefDifferenceFullyResolvedImpl(
43 const MCAssembler &Asm, const MCSymbolData &DataA,
44 const MCSymbolData *DataB, const MCFragment &FB, bool InSet,
45 bool IsPCRel) const {
46 const MCSection &SecA = DataA.getSymbol().getSection();
47 const MCSection &SecB = FB.getParent()->getSection();
48 // On ELF and COFF A - B is absolute if A and B are in the same section.
49 return &SecA == &SecB;
50 }
51
isWeak(const MCSymbolData & SD) const52 bool MCObjectWriter::isWeak(const MCSymbolData &SD) const { return false; }
53