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/ADT/StringExtras.h"
11#include "llvm/BinaryFormat/COFF.h"
12#include "llvm/BinaryFormat/Dwarf.h"
13#include "llvm/CodeGen/TargetLowering.h"
14#include "llvm/IR/Mangler.h"
15#include "llvm/IR/Operator.h"
16#include "llvm/MC/MCContext.h"
17#include "llvm/MC/MCExpr.h"
18#include "llvm/MC/MCSectionCOFF.h"
19#include "llvm/MC/MCSectionELF.h"
20#include "llvm/MC/MCValue.h"
21
22using namespace llvm;
23using namespace dwarf;
24
25const MCExpr *X86_64MachoTargetObjectFile::getTTypeGlobalReference(
26    const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
27    MachineModuleInfo *MMI, MCStreamer &Streamer) const {
28
29  // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
30  // is an indirect pc-relative reference.
31  if ((Encoding & DW_EH_PE_indirect) && (Encoding & DW_EH_PE_pcrel)) {
32    const MCSymbol *Sym = TM.getSymbol(GV);
33    const MCExpr *Res =
34      MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
35    const MCExpr *Four = MCConstantExpr::create(4, getContext());
36    return MCBinaryExpr::createAdd(Res, Four, getContext());
37  }
38
39  return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
40      GV, Encoding, TM, MMI, Streamer);
41}
42
43MCSymbol *X86_64MachoTargetObjectFile::getCFIPersonalitySymbol(
44    const GlobalValue *GV, const TargetMachine &TM,
45    MachineModuleInfo *MMI) const {
46  return TM.getSymbol(GV);
47}
48
49const MCExpr *X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel(
50    const GlobalValue *GV, const MCSymbol *Sym, const MCValue &MV,
51    int64_t Offset, MachineModuleInfo *MMI, MCStreamer &Streamer) const {
52  // On Darwin/X86-64, we need to use foo@GOTPCREL+4 to access the got entry
53  // from a data section. In case there's an additional offset, then use
54  // foo@GOTPCREL+4+<offset>.
55  unsigned FinalOff = Offset+MV.getConstant()+4;
56  const MCExpr *Res =
57    MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
58  const MCExpr *Off = MCConstantExpr::create(FinalOff, getContext());
59  return MCBinaryExpr::createAdd(Res, Off, getContext());
60}
61
62const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol(
63    const MCSymbol *Sym) const {
64  return MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
65}
66
67void
68X86FreeBSDTargetObjectFile::Initialize(MCContext &Ctx,
69                                       const TargetMachine &TM) {
70  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
71  InitializeELF(TM.Options.UseInitArray);
72}
73
74void
75X86FuchsiaTargetObjectFile::Initialize(MCContext &Ctx,
76                                       const TargetMachine &TM) {
77  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
78  InitializeELF(TM.Options.UseInitArray);
79}
80
81void
82X86LinuxNaClTargetObjectFile::Initialize(MCContext &Ctx,
83                                         const TargetMachine &TM) {
84  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
85  InitializeELF(TM.Options.UseInitArray);
86}
87
88void X86SolarisTargetObjectFile::Initialize(MCContext &Ctx,
89                                            const TargetMachine &TM) {
90  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
91  InitializeELF(TM.Options.UseInitArray);
92}
93