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//===- Target.h -------------------------------------------------*- C++ -*-===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_ELF_TARGET_H
#define LLD_ELF_TARGET_H
#include "llvm/ADT/StringRef.h"
#include <memory>
namespace lld {
namespace elf2 {
class SymbolBody;
class TargetInfo {
public:
llvm::StringRef getDefaultEntry() const { return DefaultEntry; }
uint64_t getVAStart() const { return VAStart; }
unsigned getPCRelReloc() const { return PCRelReloc; }
unsigned getGotReloc() const { return GotReloc; }
unsigned getGotRefReloc() const { return GotRefReloc; }
unsigned getRelativeReloc() const { return RelativeReloc; }
virtual void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const = 0;
virtual bool isRelRelative(uint32_t Type) const;
virtual bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const = 0;
virtual bool relocPointsToGot(uint32_t Type) const;
virtual bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const = 0;
virtual void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
uint64_t BaseAddr, uint64_t SymVA,
uint64_t GotVA) const = 0;
virtual ~TargetInfo();
protected:
uint64_t VAStart;
unsigned PCRelReloc;
unsigned GotRefReloc;
unsigned GotReloc;
unsigned RelativeReloc;
llvm::StringRef DefaultEntry = "_start";
};
class X86TargetInfo final : public TargetInfo {
public:
X86TargetInfo();
void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
bool relocPointsToGot(uint32_t Type) const override;
bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
uint64_t BaseAddr, uint64_t SymVA,
uint64_t GotVA) const override;
};
class X86_64TargetInfo final : public TargetInfo {
public:
X86_64TargetInfo();
void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
uint64_t BaseAddr, uint64_t SymVA,
uint64_t GotVA) const override;
bool isRelRelative(uint32_t Type) const override;
};
class PPC64TargetInfo final : public TargetInfo {
public:
PPC64TargetInfo();
void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
uint64_t BaseAddr, uint64_t SymVA,
uint64_t GotVA) const override;
};
class PPCTargetInfo final : public TargetInfo {
public:
PPCTargetInfo();
void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
uint64_t BaseAddr, uint64_t SymVA,
uint64_t GotVA) const override;
};
class ARMTargetInfo final : public TargetInfo {
public:
ARMTargetInfo();
void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
uint64_t BaseAddr, uint64_t SymVA,
uint64_t GotVA) const override;
};
class AArch64TargetInfo final : public TargetInfo {
public:
AArch64TargetInfo();
void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
uint64_t BaseAddr, uint64_t SymVA,
uint64_t GotVA) const override;
};
class MipsTargetInfo final : public TargetInfo {
public:
MipsTargetInfo();
void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
uint64_t BaseAddr, uint64_t SymVA,
uint64_t GotVA) const override;
};
extern std::unique_ptr<TargetInfo> Target;
}
}
#endif
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