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📁 ..
📄 ConstantPools.h(3.35 KB)
📄 LaneBitmask.h(3.24 KB)
📄 MCAsmBackend.h(8.09 KB)
📄 MCAsmInfo.h(25.48 KB)
📄 MCAsmInfoCOFF.h(900 B)
📄 MCAsmInfoDarwin.h(927 B)
📄 MCAsmInfoELF.h(711 B)
📄 MCAsmInfoWasm.h(612 B)
📄 MCAsmInfoXCOFF.h(792 B)
📄 MCAsmLayout.h(3.75 KB)
📄 MCAsmMacro.h(4.54 KB)
📄 MCAssembler.h(16.1 KB)
📄 MCCodeEmitter.h(1.53 KB)
📄 MCCodeView.h(9.03 KB)
📄 MCContext.h(31.99 KB)
📄 MCDirectives.h(3.12 KB)
📁 MCDisassembler
📄 MCDwarf.h(21.46 KB)
📄 MCELFObjectWriter.h(5.27 KB)
📄 MCELFStreamer.h(3.97 KB)
📄 MCExpr.h(21.55 KB)
📄 MCFixedLenDisassembler.h(1.39 KB)
📄 MCFixup.h(7.4 KB)
📄 MCFixupKindInfo.h(1.6 KB)
📄 MCFragment.h(17.72 KB)
📄 MCInst.h(6.06 KB)
📄 MCInstBuilder.h(1.76 KB)
📄 MCInstPrinter.h(5.88 KB)
📄 MCInstrAnalysis.h(6.8 KB)
📄 MCInstrDesc.h(25.13 KB)
📄 MCInstrInfo.h(2.93 KB)
📄 MCInstrItineraries.h(9.02 KB)
📄 MCLabel.h(1.63 KB)
📄 MCLinkerOptimizationHint.h(5.73 KB)
📄 MCMachObjectWriter.h(9.77 KB)
📄 MCObjectFileInfo.h(16.57 KB)
📄 MCObjectStreamer.h(8.78 KB)
📄 MCObjectWriter.h(4.44 KB)
📁 MCParser
📄 MCRegister.h(4.16 KB)
📄 MCRegisterInfo.h(28.96 KB)
📄 MCSchedule.h(16.25 KB)
📄 MCSection.h(6.52 KB)
📄 MCSectionCOFF.h(3.37 KB)
📄 MCSectionELF.h(3.3 KB)
📄 MCSectionMachO.h(3.15 KB)
📄 MCSectionWasm.h(2.78 KB)
📄 MCSectionXCOFF.h(3.22 KB)
📄 MCStreamer.h(43.55 KB)
📄 MCSubtargetInfo.h(10.04 KB)
📄 MCSymbol.h(13.8 KB)
📄 MCSymbolCOFF.h(1.62 KB)
📄 MCSymbolELF.h(1.45 KB)
📄 MCSymbolMachO.h(4.18 KB)
📄 MCSymbolWasm.h(4.28 KB)
📄 MCSymbolXCOFF.h(2.39 KB)
📄 MCTargetOptions.h(2.29 KB)
📄 MCTargetOptionsCommandFlags.h(1.26 KB)
📄 MCValue.h(2.42 KB)
📄 MCWasmObjectWriter.h(1.61 KB)
📄 MCWasmStreamer.h(2.83 KB)
📄 MCWin64EH.h(2.41 KB)
📄 MCWinCOFFObjectWriter.h(1.81 KB)
📄 MCWinCOFFStreamer.h(3.05 KB)
📄 MCWinEH.h(1.97 KB)
📄 MCXCOFFObjectWriter.h(1.45 KB)
📄 MCXCOFFStreamer.h(1.86 KB)
📄 MachineLocation.h(2.04 KB)
📄 SectionKind.h(7.53 KB)
📄 StringTableBuilder.h(2.47 KB)
📄 SubtargetFeature.h(7.12 KB)

Editing: MCELFObjectWriter.h

//===- llvm/MC/MCELFObjectWriter.h - ELF Object Writer ----------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_MC_MCELFOBJECTWRITER_H
#define LLVM_MC_MCELFOBJECTWRITER_H

#include "llvm/ADT/Triple.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdint>
#include <vector>

namespace llvm {

class MCAssembler;
class MCContext;
class MCFixup;
class MCObjectWriter;
class MCSymbol;
class MCSymbolELF;
class MCValue;

struct ELFRelocationEntry {
  uint64_t Offset; // Where is the relocation.
  const MCSymbolELF *Symbol; // The symbol to relocate with.
  unsigned Type;   // The type of the relocation.
  uint64_t Addend; // The addend to use.
  const MCSymbolELF *OriginalSymbol; // The original value of Symbol if we changed it.
  uint64_t OriginalAddend; // The original value of addend.

ELFRelocationEntry(uint64_t Offset, const MCSymbolELF *Symbol, unsigned Type,
                     uint64_t Addend, const MCSymbolELF *OriginalSymbol,
                     uint64_t OriginalAddend)
      : Offset(Offset), Symbol(Symbol), Type(Type), Addend(Addend),
        OriginalSymbol(OriginalSymbol), OriginalAddend(OriginalAddend) {}

void print(raw_ostream &Out) const {
    Out << "Off=" << Offset << ", Sym=" << Symbol << ", Type=" << Type
        << ", Addend=" << Addend << ", OriginalSymbol=" << OriginalSymbol
        << ", OriginalAddend=" << OriginalAddend;
  }

void dump() const { print(errs()); }
};

class MCELFObjectTargetWriter : public MCObjectTargetWriter {
  const uint8_t OSABI;
  const uint8_t ABIVersion;
  const uint16_t EMachine;
  const unsigned HasRelocationAddend : 1;
  const unsigned Is64Bit : 1;

protected:
  MCELFObjectTargetWriter(bool Is64Bit_, uint8_t OSABI_, uint16_t EMachine_,
                          bool HasRelocationAddend_, uint8_t ABIVersion_ = 0);

public:
  virtual ~MCELFObjectTargetWriter() = default;

Triple::ObjectFormatType getFormat() const override { return Triple::ELF; }
  static bool classof(const MCObjectTargetWriter *W) {
    return W->getFormat() == Triple::ELF;
  }

static uint8_t getOSABI(Triple::OSType OSType) {
    switch (OSType) {
      case Triple::CloudABI:
        return ELF::ELFOSABI_CLOUDABI;
      case Triple::HermitCore:
        return ELF::ELFOSABI_STANDALONE;
      case Triple::PS4:
      case Triple::FreeBSD:
        return ELF::ELFOSABI_FREEBSD;
      default:
        return ELF::ELFOSABI_NONE;
    }
  }

virtual unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
                                const MCFixup &Fixup, bool IsPCRel) const = 0;

virtual bool needsRelocateWithSymbol(const MCSymbol &Sym,
                                       unsigned Type) const;

virtual void sortRelocs(const MCAssembler &Asm,
                          std::vector<ELFRelocationEntry> &Relocs);

virtual void addTargetSectionFlags(MCContext &Ctx, MCSectionELF &Sec);

/// \name Accessors
  /// @{
  uint8_t getOSABI() const { return OSABI; }
  uint8_t getABIVersion() const { return ABIVersion; }
  uint16_t getEMachine() const { return EMachine; }
  bool hasRelocationAddend() const { return HasRelocationAddend; }
  bool is64Bit() const { return Is64Bit; }
  /// @}

// Instead of changing everyone's API we pack the N64 Type fields
  // into the existing 32 bit data unsigned.
#define R_TYPE_SHIFT 0
#define R_TYPE_MASK 0xffffff00
#define R_TYPE2_SHIFT 8
#define R_TYPE2_MASK 0xffff00ff
#define R_TYPE3_SHIFT 16
#define R_TYPE3_MASK 0xff00ffff
#define R_SSYM_SHIFT 24
#define R_SSYM_MASK 0x00ffffff

// N64 relocation type accessors
  uint8_t getRType(uint32_t Type) const {
    return (unsigned)((Type >> R_TYPE_SHIFT) & 0xff);
  }
  uint8_t getRType2(uint32_t Type) const {
    return (unsigned)((Type >> R_TYPE2_SHIFT) & 0xff);
  }
  uint8_t getRType3(uint32_t Type) const {
    return (unsigned)((Type >> R_TYPE3_SHIFT) & 0xff);
  }
  uint8_t getRSsym(uint32_t Type) const {
    return (unsigned)((Type >> R_SSYM_SHIFT) & 0xff);
  }

// N64 relocation type setting
  static unsigned setRTypes(unsigned Value1, unsigned Value2, unsigned Value3) {
    return ((Value1 & 0xff) << R_TYPE_SHIFT) |
           ((Value2 & 0xff) << R_TYPE2_SHIFT) |
           ((Value3 & 0xff) << R_TYPE3_SHIFT);
  }
  unsigned setRSsym(unsigned Value, unsigned Type) const {
    return (Type & R_SSYM_MASK) | ((Value & 0xff) << R_SSYM_SHIFT);
  }
};

/// Construct a new ELF writer instance.
///
/// \param MOTW - The target specific ELF writer subclass.
/// \param OS - The stream to write to.
/// \returns The constructed object writer.
std::unique_ptr<MCObjectWriter>
createELFObjectWriter(std::unique_ptr<MCELFObjectTargetWriter> MOTW,
                      raw_pwrite_stream &OS, bool IsLittleEndian);

std::unique_ptr<MCObjectWriter>
createELFDwoObjectWriter(std::unique_ptr<MCELFObjectTargetWriter> MOTW,
                         raw_pwrite_stream &OS, raw_pwrite_stream &DwoOS,
                         bool IsLittleEndian);

} // end namespace llvm

#endif // LLVM_MC_MCELFOBJECTWRITER_H

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