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9a0a08ccc4
Some targets (ie. Mips) have additional rules for ordering the relocation table entries. Allow them to override generic sortRelocs(), which sorts entries by Offset. Then override this function for Mips, to emit HI16 and GOT16 relocations against the local symbol in pair with the corresponding LO16 relocation. Patch by Vladimir Stefanovic. Differential Revision: http://reviews.llvm.org/D7414 llvm-svn: 234883
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
//===-- MCELFObjectTargetWriter.cpp - ELF Target Writer Subclass ----------===//
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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/ADT/STLExtras.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCValue.h"
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using namespace llvm;
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MCELFObjectTargetWriter::MCELFObjectTargetWriter(bool Is64Bit_,
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uint8_t OSABI_,
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uint16_t EMachine_,
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bool HasRelocationAddend_,
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bool IsN64_)
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: OSABI(OSABI_), EMachine(EMachine_),
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HasRelocationAddend(HasRelocationAddend_), Is64Bit(Is64Bit_),
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IsN64(IsN64_){
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}
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bool MCELFObjectTargetWriter::needsRelocateWithSymbol(const MCSymbolData &SD,
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unsigned Type) const {
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return false;
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}
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// ELF doesn't require relocations to be in any order. We sort by the Offset,
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// just to match gnu as for easier comparison. The use type is an arbitrary way
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// of making the sort deterministic.
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static int cmpRel(const ELFRelocationEntry *AP, const ELFRelocationEntry *BP) {
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const ELFRelocationEntry &A = *AP;
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const ELFRelocationEntry &B = *BP;
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if (A.Offset != B.Offset)
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return B.Offset - A.Offset;
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if (B.Type != A.Type)
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return A.Type - B.Type;
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//llvm_unreachable("ELFRelocs might be unstable!");
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return 0;
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}
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void
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MCELFObjectTargetWriter::sortRelocs(const MCAssembler &Asm,
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std::vector<ELFRelocationEntry> &Relocs) {
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array_pod_sort(Relocs.begin(), Relocs.end(), cmpRel);
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}
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