1 //===-- MCELFObjectTargetWriter.cpp - ELF Target Writer Subclass ----------===// 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/ADT/STLExtras.h" 11 #include "llvm/MC/MCELFObjectWriter.h" 12 #include "llvm/MC/MCExpr.h" 13 #include "llvm/MC/MCValue.h" 14 15 using namespace llvm; 16 17 MCELFObjectTargetWriter::MCELFObjectTargetWriter(bool Is64Bit_, 18 uint8_t OSABI_, 19 uint16_t EMachine_, 20 bool HasRelocationAddend_, 21 bool IsN64_) 22 : OSABI(OSABI_), EMachine(EMachine_), 23 HasRelocationAddend(HasRelocationAddend_), Is64Bit(Is64Bit_), 24 IsN64(IsN64_){ 25 } 26 27 bool MCELFObjectTargetWriter::needsRelocateWithSymbol(const MCSymbolData &SD, 28 unsigned Type) const { 29 return false; 30 } 31 32 // ELF doesn't require relocations to be in any order. We sort by the Offset, 33 // just to match gnu as for easier comparison. The use type is an arbitrary way 34 // of making the sort deterministic. 35 static int cmpRel(const ELFRelocationEntry *AP, const ELFRelocationEntry *BP) { 36 const ELFRelocationEntry &A = *AP; 37 const ELFRelocationEntry &B = *BP; 38 if (A.Offset != B.Offset) 39 return B.Offset - A.Offset; 40 if (B.Type != A.Type) 41 return A.Type - B.Type; 42 //llvm_unreachable("ELFRelocs might be unstable!"); 43 return 0; 44 } 45 46 47 void 48 MCELFObjectTargetWriter::sortRelocs(const MCAssembler &Asm, 49 std::vector<ELFRelocationEntry> &Relocs) { 50 array_pod_sort(Relocs.begin(), Relocs.end(), cmpRel); 51 } 52
