MCELFObjectWriter.h [plain text]
#ifndef LLVM_MC_MCELFOBJECTWRITER_H
#define LLVM_MC_MCELFOBJECTWRITER_H
#include "llvm/ADT/Triple.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/ELF.h"
#include <vector>
namespace llvm {
class MCAssembler;
class MCFixup;
class MCFragment;
class MCObjectWriter;
class MCSectionData;
class MCSymbol;
class MCSymbolData;
class MCValue;
class MCELFObjectTargetWriter {
const uint8_t OSABI;
const uint16_t EMachine;
const unsigned HasRelocationAddend : 1;
const unsigned Is64Bit : 1;
const unsigned IsN64 : 1;
protected:
MCELFObjectTargetWriter(bool Is64Bit_, uint8_t OSABI_,
uint16_t EMachine_, bool HasRelocationAddend,
bool IsN64=false);
public:
static uint8_t getOSABI(Triple::OSType OSType) {
switch (OSType) {
case Triple::PS4:
case Triple::FreeBSD:
return ELF::ELFOSABI_FREEBSD;
case Triple::Linux:
return ELF::ELFOSABI_LINUX;
default:
return ELF::ELFOSABI_NONE;
}
}
virtual ~MCELFObjectTargetWriter() {}
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
bool IsPCRel) const = 0;
virtual bool needsRelocateWithSymbol(const MCSymbolData &SD,
unsigned Type) const;
uint8_t getOSABI() const { return OSABI; }
uint16_t getEMachine() const { return EMachine; }
bool hasRelocationAddend() const { return HasRelocationAddend; }
bool is64Bit() const { return Is64Bit; }
bool isN64() const { return IsN64; }
#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
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);
}
unsigned setRType(unsigned Value, unsigned Type) const {
return ((Type & R_TYPE_MASK) | ((Value & 0xff) << R_TYPE_SHIFT));
}
unsigned setRType2(unsigned Value, unsigned Type) const {
return (Type & R_TYPE2_MASK) | ((Value & 0xff) << R_TYPE2_SHIFT);
}
unsigned setRType3(unsigned Value, unsigned Type) const {
return (Type & R_TYPE3_MASK) | ((Value & 0xff) << R_TYPE3_SHIFT);
}
unsigned setRSsym(unsigned Value, unsigned Type) const {
return (Type & R_SSYM_MASK) | ((Value & 0xff) << R_SSYM_SHIFT);
}
};
MCObjectWriter *createELFObjectWriter(MCELFObjectTargetWriter *MOTW,
raw_ostream &OS, bool IsLittleEndian);
}
#endif