mirror of
https://github.com/c64scene-ar/llvm-6502.git
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1e0dc31134
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227091 91177308-0d34-0410-b5e6-96231b3b80d8
121 lines
3.6 KiB
C++
121 lines
3.6 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 MCSectionData;
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class MCSymbol;
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class MCSymbolData;
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class MCValue;
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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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const unsigned IsN64 : 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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bool IsN64=false);
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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::PS4:
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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) const = 0;
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virtual bool needsRelocateWithSymbol(const MCSymbolData &SD,
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unsigned Type) const;
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/// @name Accessors
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/// @{
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uint8_t getOSABI() const { return OSABI; }
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uint16_t getEMachine() const { return EMachine; }
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bool hasRelocationAddend() const { return HasRelocationAddend; }
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bool is64Bit() const { return Is64Bit; }
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bool isN64() const { return IsN64; }
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/// @}
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// Instead of changing everyone's API we pack the N64 Type fields
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// into the existing 32 bit data unsigned.
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#define R_TYPE_SHIFT 0
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#define R_TYPE_MASK 0xffffff00
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#define R_TYPE2_SHIFT 8
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#define R_TYPE2_MASK 0xffff00ff
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#define R_TYPE3_SHIFT 16
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#define R_TYPE3_MASK 0xff00ffff
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#define R_SSYM_SHIFT 24
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#define R_SSYM_MASK 0x00ffffff
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// N64 relocation type accessors
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uint8_t getRType(uint32_t Type) const {
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return (unsigned)((Type >> R_TYPE_SHIFT) & 0xff);
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}
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uint8_t getRType2(uint32_t Type) const {
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return (unsigned)((Type >> R_TYPE2_SHIFT) & 0xff);
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}
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uint8_t getRType3(uint32_t Type) const {
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return (unsigned)((Type >> R_TYPE3_SHIFT) & 0xff);
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}
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uint8_t getRSsym(uint32_t Type) const {
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return (unsigned)((Type >> R_SSYM_SHIFT) & 0xff);
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}
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// N64 relocation type setting
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unsigned setRType(unsigned Value, unsigned Type) const {
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return ((Type & R_TYPE_MASK) | ((Value & 0xff) << R_TYPE_SHIFT));
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}
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unsigned setRType2(unsigned Value, unsigned Type) const {
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return (Type & R_TYPE2_MASK) | ((Value & 0xff) << R_TYPE2_SHIFT);
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}
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unsigned setRType3(unsigned Value, unsigned Type) const {
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return (Type & R_TYPE3_MASK) | ((Value & 0xff) << R_TYPE3_SHIFT);
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}
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unsigned setRSsym(unsigned Value, unsigned Type) const {
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return (Type & R_SSYM_MASK) | ((Value & 0xff) << R_SSYM_SHIFT);
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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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