137 lines
5.2 KiB
C++
137 lines
5.2 KiB
C++
//===- Target.h -------------------------------------------------*- C++ -*-===//
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//
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// The LLVM Linker
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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 LLD_ELF_TARGET_H
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#define LLD_ELF_TARGET_H
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#include "llvm/ADT/StringRef.h"
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#include <memory>
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namespace lld {
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namespace elf2 {
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class SymbolBody;
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class TargetInfo {
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public:
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llvm::StringRef getDefaultEntry() const { return DefaultEntry; }
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unsigned getPageSize() const { return PageSize; }
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uint64_t getVAStart() const { return VAStart; }
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unsigned getPCRelReloc() const { return PCRelReloc; }
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unsigned getGotReloc() const { return GotReloc; }
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unsigned getGotRefReloc() const { return GotRefReloc; }
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unsigned getRelativeReloc() const { return RelativeReloc; }
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unsigned getPltEntrySize() const { return PltEntrySize; }
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virtual void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
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uint64_t PltEntryAddr) const = 0;
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virtual bool isRelRelative(uint32_t Type) const;
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virtual bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const = 0;
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virtual bool relocPointsToGot(uint32_t Type) const;
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virtual bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const = 0;
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virtual void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
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uint64_t BaseAddr, uint64_t SymVA) const = 0;
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virtual ~TargetInfo();
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protected:
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unsigned PageSize = 4096;
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uint64_t VAStart;
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unsigned PCRelReloc;
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unsigned GotRefReloc;
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unsigned GotReloc;
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unsigned RelativeReloc;
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unsigned PltEntrySize = 8;
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llvm::StringRef DefaultEntry = "_start";
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};
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class X86TargetInfo final : public TargetInfo {
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public:
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X86TargetInfo();
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void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
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uint64_t PltEntryAddr) const override;
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocPointsToGot(uint32_t Type) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
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uint64_t BaseAddr, uint64_t SymVA) const override;
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};
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class X86_64TargetInfo final : public TargetInfo {
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public:
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X86_64TargetInfo();
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void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
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uint64_t PltEntryAddr) const override;
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
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uint64_t BaseAddr, uint64_t SymVA) const override;
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bool isRelRelative(uint32_t Type) const override;
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};
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class PPC64TargetInfo final : public TargetInfo {
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public:
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PPC64TargetInfo();
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void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
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uint64_t PltEntryAddr) const override;
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
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uint64_t BaseAddr, uint64_t SymVA) const override;
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};
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class PPCTargetInfo final : public TargetInfo {
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public:
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PPCTargetInfo();
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void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
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uint64_t PltEntryAddr) const override;
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
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uint64_t BaseAddr, uint64_t SymVA) const override;
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};
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class ARMTargetInfo final : public TargetInfo {
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public:
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ARMTargetInfo();
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void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
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uint64_t PltEntryAddr) const override;
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
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uint64_t BaseAddr, uint64_t SymVA) const override;
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};
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class AArch64TargetInfo final : public TargetInfo {
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public:
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AArch64TargetInfo();
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void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
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uint64_t PltEntryAddr) const override;
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
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uint64_t BaseAddr, uint64_t SymVA) const override;
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};
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class MipsTargetInfo final : public TargetInfo {
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public:
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MipsTargetInfo();
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void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
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uint64_t PltEntryAddr) const override;
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Buf, const void *RelP, uint32_t Type,
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uint64_t BaseAddr, uint64_t SymVA) const override;
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};
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extern std::unique_ptr<TargetInfo> Target;
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}
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}
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#endif
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