//===-- MCELFObjectTargetWriter.cpp - ELF Target Writer Subclass ----------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "llvm/ADT/STLExtras.h" #include "llvm/MC/MCELFObjectWriter.h" #include "llvm/MC/MCExpr.h" #include "llvm/MC/MCValue.h" using namespace llvm; MCELFObjectTargetWriter::MCELFObjectTargetWriter(bool Is64Bit_, uint8_t OSABI_, uint16_t EMachine_, bool HasRelocationAddend_, bool IsN64_) : OSABI(OSABI_), EMachine(EMachine_), HasRelocationAddend(HasRelocationAddend_), Is64Bit(Is64Bit_), IsN64(IsN64_){ } const MCSymbol *MCELFObjectTargetWriter::ExplicitRelSym(const MCAssembler &Asm, const MCValue &Target, const MCFragment &F, const MCFixup &Fixup, bool IsPCRel) const { return NULL; } const MCSymbol *MCELFObjectTargetWriter::undefinedExplicitRelSym(const MCValue &Target, const MCFixup &Fixup, bool IsPCRel) const { const MCSymbol &Symbol = Target.getSymA()->getSymbol(); return &Symbol.AliasedSymbol(); } // ELF doesn't require relocations to be in any order. We sort by the r_offset, // just to match gnu as for easier comparison. The use type and index is an // arbitrary way of making the sort deterministic. static int cmpRel(const ELFRelocationEntry *AP, const ELFRelocationEntry *BP) { const ELFRelocationEntry &A = *AP; const ELFRelocationEntry &B = *BP; if (A.r_offset != B.r_offset) return B.r_offset - A.r_offset; if (B.Type != A.Type) return A.Type - B.Type; if (B.Index != A.Index) return B.Index - A.Index; llvm_unreachable("ELFRelocs might be unstable!"); } void MCELFObjectTargetWriter::sortRelocs(const MCAssembler &Asm, std::vector<ELFRelocationEntry> &Relocs) { array_pod_sort(Relocs.begin(), Relocs.end(), cmpRel); }