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 15using namespace llvm; 16 17MCELFObjectTargetWriter::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 27bool 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. 35static 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 47void 48MCELFObjectTargetWriter::sortRelocs(const MCAssembler &Asm, 49 std::vector<ELFRelocationEntry> &Relocs) { 50 array_pod_sort(Relocs.begin(), Relocs.end(), cmpRel); 51} 52