1//===-- X86TargetObjectFile.cpp - X86 Object Info -------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "X86TargetObjectFile.h"
10#include "llvm/BinaryFormat/Dwarf.h"
11#include "llvm/MC/MCExpr.h"
12#include "llvm/MC/MCValue.h"
13#include "llvm/Target/TargetMachine.h"
14
15using namespace llvm;
16using namespace dwarf;
17
18const MCExpr *X86_64MachoTargetObjectFile::getTTypeGlobalReference(
19    const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
20    MachineModuleInfo *MMI, MCStreamer &Streamer) const {
21
22  // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
23  // is an indirect pc-relative reference.
24  if ((Encoding & DW_EH_PE_indirect) && (Encoding & DW_EH_PE_pcrel)) {
25    const MCSymbol *Sym = TM.getSymbol(GV);
26    const MCExpr *Res =
27      MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
28    const MCExpr *Four = MCConstantExpr::create(4, getContext());
29    return MCBinaryExpr::createAdd(Res, Four, getContext());
30  }
31
32  return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
33      GV, Encoding, TM, MMI, Streamer);
34}
35
36MCSymbol *X86_64MachoTargetObjectFile::getCFIPersonalitySymbol(
37    const GlobalValue *GV, const TargetMachine &TM,
38    MachineModuleInfo *MMI) const {
39  return TM.getSymbol(GV);
40}
41
42const MCExpr *X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel(
43    const GlobalValue *GV, const MCSymbol *Sym, const MCValue &MV,
44    int64_t Offset, MachineModuleInfo *MMI, MCStreamer &Streamer) const {
45  // On Darwin/X86-64, we need to use foo@GOTPCREL+4 to access the got entry
46  // from a data section. In case there's an additional offset, then use
47  // foo@GOTPCREL+4+<offset>.
48  unsigned FinalOff = Offset+MV.getConstant()+4;
49  const MCExpr *Res =
50    MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
51  const MCExpr *Off = MCConstantExpr::create(FinalOff, getContext());
52  return MCBinaryExpr::createAdd(Res, Off, getContext());
53}
54
55const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol(
56    const MCSymbol *Sym) const {
57  return MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
58}
59