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annotate lib/Target/X86/X86TargetObjectFile.cpp @ 147:c2174574ed3a

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LLVM 10
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 16:55:33 +0900
parents 3a76565eade5
children
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1 //===-- X86TargetObjectFile.cpp - X86 Object Info -------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "X86TargetObjectFile.h"
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10 #include "llvm/ADT/StringExtras.h"
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11 #include "llvm/BinaryFormat/COFF.h"
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12 #include "llvm/BinaryFormat/Dwarf.h"
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13 #include "llvm/CodeGen/TargetLowering.h"
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14 #include "llvm/IR/Mangler.h"
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15 #include "llvm/IR/Operator.h"
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16 #include "llvm/MC/MCContext.h"
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17 #include "llvm/MC/MCExpr.h"
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18 #include "llvm/MC/MCSectionCOFF.h"
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19 #include "llvm/MC/MCSectionELF.h"
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20 #include "llvm/MC/MCValue.h"
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21
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22 using namespace llvm;
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23 using namespace dwarf;
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24
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25 const MCExpr *X86_64MachoTargetObjectFile::getTTypeGlobalReference(
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26 const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
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27 MachineModuleInfo *MMI, MCStreamer &Streamer) const {
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28
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29 // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
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30 // is an indirect pc-relative reference.
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31 if ((Encoding & DW_EH_PE_indirect) && (Encoding & DW_EH_PE_pcrel)) {
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32 const MCSymbol *Sym = TM.getSymbol(GV);
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33 const MCExpr *Res =
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34 MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
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35 const MCExpr *Four = MCConstantExpr::create(4, getContext());
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36 return MCBinaryExpr::createAdd(Res, Four, getContext());
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37 }
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38
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39 return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
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40 GV, Encoding, TM, MMI, Streamer);
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41 }
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42
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43 MCSymbol *X86_64MachoTargetObjectFile::getCFIPersonalitySymbol(
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44 const GlobalValue *GV, const TargetMachine &TM,
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45 MachineModuleInfo *MMI) const {
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46 return TM.getSymbol(GV);
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47 }
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49 const MCExpr *X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel(
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50 const MCSymbol *Sym, const MCValue &MV, int64_t Offset,
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51 MachineModuleInfo *MMI, MCStreamer &Streamer) const {
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52 // On Darwin/X86-64, we need to use foo@GOTPCREL+4 to access the got entry
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53 // from a data section. In case there's an additional offset, then use
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54 // foo@GOTPCREL+4+<offset>.
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55 unsigned FinalOff = Offset+MV.getConstant()+4;
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56 const MCExpr *Res =
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57 MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
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58 const MCExpr *Off = MCConstantExpr::create(FinalOff, getContext());
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59 return MCBinaryExpr::createAdd(Res, Off, getContext());
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60 }
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62 const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol(
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63 const MCSymbol *Sym) const {
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64 return MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
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65 }
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66
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67 void
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68 X86FreeBSDTargetObjectFile::Initialize(MCContext &Ctx,
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69 const TargetMachine &TM) {
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70 TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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71 InitializeELF(TM.Options.UseInitArray);
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72 }
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73
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74 void
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75 X86FuchsiaTargetObjectFile::Initialize(MCContext &Ctx,
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76 const TargetMachine &TM) {
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77 TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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78 InitializeELF(TM.Options.UseInitArray);
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79 }
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80
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81 void
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82 X86LinuxNaClTargetObjectFile::Initialize(MCContext &Ctx,
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83 const TargetMachine &TM) {
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84 TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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85 InitializeELF(TM.Options.UseInitArray);
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86 }
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88 void X86SolarisTargetObjectFile::Initialize(MCContext &Ctx,
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89 const TargetMachine &TM) {
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90 TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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91 InitializeELF(TM.Options.UseInitArray);
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92 }