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https://github.com/c64scene-ar/llvm-6502.git
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f1d0f7781e
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153429 91177308-0d34-0410-b5e6-96231b3b80d8
111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
//===-- llvm/MC/MCELFObjectWriter.h - ELF Object Writer ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCELFOBJECTWRITER_H
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#define LLVM_MC_MCELFOBJECTWRITER_H
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#include "llvm/ADT/Triple.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/ELF.h"
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#include <vector>
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namespace llvm {
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class MCAssembler;
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class MCFixup;
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class MCFragment;
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class MCObjectWriter;
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class MCSymbol;
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class MCValue;
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/// @name Relocation Data
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/// @{
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struct ELFRelocationEntry {
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// Make these big enough for both 32-bit and 64-bit
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uint64_t r_offset;
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int Index;
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unsigned Type;
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const MCSymbol *Symbol;
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uint64_t r_addend;
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const MCFixup *Fixup;
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ELFRelocationEntry()
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: r_offset(0), Index(0), Type(0), Symbol(0), r_addend(0), Fixup(0) {}
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ELFRelocationEntry(uint64_t RelocOffset, int Idx, unsigned RelType,
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const MCSymbol *Sym, uint64_t Addend, const MCFixup &Fixup)
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: r_offset(RelocOffset), Index(Idx), Type(RelType), Symbol(Sym),
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r_addend(Addend), Fixup(&Fixup) {}
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// Support lexicographic sorting.
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bool operator<(const ELFRelocationEntry &RE) const {
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return RE.r_offset < r_offset;
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}
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};
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class MCELFObjectTargetWriter {
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const uint8_t OSABI;
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const uint16_t EMachine;
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const unsigned HasRelocationAddend : 1;
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const unsigned Is64Bit : 1;
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protected:
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MCELFObjectTargetWriter(bool Is64Bit_, uint8_t OSABI_,
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uint16_t EMachine_, bool HasRelocationAddend_);
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public:
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static uint8_t getOSABI(Triple::OSType OSType) {
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switch (OSType) {
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case Triple::FreeBSD:
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return ELF::ELFOSABI_FREEBSD;
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case Triple::Linux:
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return ELF::ELFOSABI_LINUX;
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default:
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return ELF::ELFOSABI_NONE;
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}
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}
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virtual ~MCELFObjectTargetWriter() {}
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virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
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bool IsPCRel, bool IsRelocWithSymbol,
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int64_t Addend) const = 0;
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virtual unsigned getEFlags() const;
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virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
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const MCValue &Target,
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const MCFragment &F,
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const MCFixup &Fixup,
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bool IsPCRel) const;
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virtual void adjustFixupOffset(const MCFixup &Fixup,
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uint64_t &RelocOffset);
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virtual void sortRelocs(const MCAssembler &Asm,
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std::vector<ELFRelocationEntry> &Relocs);
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/// @name Accessors
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/// @{
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uint8_t getOSABI() { return OSABI; }
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uint16_t getEMachine() { return EMachine; }
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bool hasRelocationAddend() { return HasRelocationAddend; }
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bool is64Bit() const { return Is64Bit; }
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/// @}
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};
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/// \brief Construct a new ELF writer instance.
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///
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/// \param MOTW - The target specific ELF writer subclass.
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/// \param OS - The stream to write to.
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/// \returns The constructed object writer.
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MCObjectWriter *createELFObjectWriter(MCELFObjectTargetWriter *MOTW,
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raw_ostream &OS, bool IsLittleEndian);
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} // End llvm namespace
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#endif
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