| //===-- X86TargetObjectFile.cpp - X86 Object Info -------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "X86TargetObjectFile.h" |
| #include "llvm/BinaryFormat/Dwarf.h" |
| #include "llvm/MC/MCExpr.h" |
| #include "llvm/MC/MCValue.h" |
| #include "llvm/Target/TargetMachine.h" |
| |
| using namespace llvm; |
| using namespace dwarf; |
| |
| const MCExpr *X86_64MachoTargetObjectFile::getTTypeGlobalReference( |
| const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM, |
| MachineModuleInfo *MMI, MCStreamer &Streamer) const { |
| |
| // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which |
| // is an indirect pc-relative reference. |
| if ((Encoding & DW_EH_PE_indirect) && (Encoding & DW_EH_PE_pcrel)) { |
| const MCSymbol *Sym = TM.getSymbol(GV); |
| const MCExpr *Res = |
| MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext()); |
| const MCExpr *Four = MCConstantExpr::create(4, getContext()); |
| return MCBinaryExpr::createAdd(Res, Four, getContext()); |
| } |
| |
| return TargetLoweringObjectFileMachO::getTTypeGlobalReference( |
| GV, Encoding, TM, MMI, Streamer); |
| } |
| |
| MCSymbol *X86_64MachoTargetObjectFile::getCFIPersonalitySymbol( |
| const GlobalValue *GV, const TargetMachine &TM, |
| MachineModuleInfo *MMI) const { |
| return TM.getSymbol(GV); |
| } |
| |
| const MCExpr *X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel( |
| const GlobalValue *GV, const MCSymbol *Sym, const MCValue &MV, |
| int64_t Offset, MachineModuleInfo *MMI, MCStreamer &Streamer) const { |
| // On Darwin/X86-64, we need to use foo@GOTPCREL+4 to access the got entry |
| // from a data section. In case there's an additional offset, then use |
| // foo@GOTPCREL+4+<offset>. |
| unsigned FinalOff = Offset+MV.getConstant()+4; |
| const MCExpr *Res = |
| MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext()); |
| const MCExpr *Off = MCConstantExpr::create(FinalOff, getContext()); |
| return MCBinaryExpr::createAdd(Res, Off, getContext()); |
| } |
| |
| const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol( |
| const MCSymbol *Sym) const { |
| return MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext()); |
| } |