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ae37969223
-fuse-init-array is now the CC1 default but TargetLoweringObjectFileELF::UseInitArray still defaults to false. The following two unknown OS target triples continue using .ctors/.dtors because InitializeELF is not called. clang -target i386 -c a.c clang -target x86_64 -c a.c This cleanup fixes this as a bonus. X86SpeculativeLoadHardeningPass::tracePredStateThroughCall can call MCContext::createTempSymbol before TargetLoweringObjectFileELF::Initialize(). We need to call TargetLoweringObjectFileELF::Initialize() ealier. test/CodeGen/X86/speculative-load-hardening-indirect.ll Differential Revision: https://reviews.llvm.org/D71360
71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
//===-- X86TargetObjectFile.cpp - X86 Object Info -------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "X86TargetObjectFile.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/CodeGen/TargetLowering.h"
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#include "llvm/IR/Mangler.h"
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#include "llvm/IR/Operator.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCSectionCOFF.h"
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#include "llvm/MC/MCSectionELF.h"
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#include "llvm/MC/MCValue.h"
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using namespace llvm;
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using namespace dwarf;
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const MCExpr *X86_64MachoTargetObjectFile::getTTypeGlobalReference(
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const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
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MachineModuleInfo *MMI, MCStreamer &Streamer) const {
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// On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
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// is an indirect pc-relative reference.
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if ((Encoding & DW_EH_PE_indirect) && (Encoding & DW_EH_PE_pcrel)) {
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const MCSymbol *Sym = TM.getSymbol(GV);
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const MCExpr *Res =
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MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
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const MCExpr *Four = MCConstantExpr::create(4, getContext());
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return MCBinaryExpr::createAdd(Res, Four, getContext());
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}
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return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
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GV, Encoding, TM, MMI, Streamer);
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}
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MCSymbol *X86_64MachoTargetObjectFile::getCFIPersonalitySymbol(
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const GlobalValue *GV, const TargetMachine &TM,
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MachineModuleInfo *MMI) const {
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return TM.getSymbol(GV);
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}
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const MCExpr *X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel(
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const GlobalValue *GV, const MCSymbol *Sym, const MCValue &MV,
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int64_t Offset, MachineModuleInfo *MMI, MCStreamer &Streamer) const {
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// On Darwin/X86-64, we need to use foo@GOTPCREL+4 to access the got entry
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// from a data section. In case there's an additional offset, then use
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// foo@GOTPCREL+4+<offset>.
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unsigned FinalOff = Offset+MV.getConstant()+4;
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const MCExpr *Res =
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MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
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const MCExpr *Off = MCConstantExpr::create(FinalOff, getContext());
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return MCBinaryExpr::createAdd(Res, Off, getContext());
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}
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const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol(
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const MCSymbol *Sym) const {
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return MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
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}
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void X86ELFTargetObjectFile::Initialize(MCContext &Ctx,
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const TargetMachine &TM) {
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TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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}
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