83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
//===- lib/ReaderWriter/ELF/TargetHandler.h -------------------------------===//
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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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///
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/// \file
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/// \brief These interfaces provide target specific hooks to change the linker's
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/// behaivor.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLD_READER_WRITER_ELF_TARGET_HANDLER_H
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#define LLD_READER_WRITER_ELF_TARGET_HANDLER_H
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#include "Layout.h"
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#include "lld/Core/LLVM.h"
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#include "lld/Core/LinkingContext.h"
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#include "lld/Core/STDExtras.h"
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#include "lld/ReaderWriter/ELFLinkingContext.h"
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#include "llvm/ADT/Hashing.h"
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#include "llvm/Support/FileOutputBuffer.h"
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#include <memory>
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#include <vector>
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namespace lld {
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namespace elf {
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template <class ELFT> class DynamicTable;
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template <class ELFT> class DynamicSymbolTable;
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template <class ELFT> class ELFDefinedAtom;
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template <class ELFT> class ELFReference;
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class ELFWriter;
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template <class ELFT> class ELFHeader;
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template <class ELFT> class Section;
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template <class ELFT> class TargetLayout;
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template <class ELFT> class TargetRelocationHandler {
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public:
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virtual error_code applyRelocation(ELFWriter &, llvm::FileOutputBuffer &,
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const lld::AtomLayout &,
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const Reference &) const = 0;
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virtual ~TargetRelocationHandler() {}
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};
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/// \brief TargetHandler contains all the information responsible to handle a
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/// a particular target on ELF. A target might wish to override implementation
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/// of creating atoms and how the atoms are written to the output file.
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template <class ELFT> class TargetHandler : public TargetHandlerBase {
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public:
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/// Constructor
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TargetHandler(ELFLinkingContext &targetInfo) : _context(targetInfo) {}
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/// The layout determined completely by the Target.
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virtual TargetLayout<ELFT> &getTargetLayout() = 0;
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/// Determine how relocations need to be applied.
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virtual const TargetRelocationHandler<ELFT> &getRelocationHandler() const = 0;
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/// How does the target deal with reading input files.
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virtual std::unique_ptr<Reader> getObjReader(bool) = 0;
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/// How does the target deal with reading dynamic libraries.
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virtual std::unique_ptr<Reader> getDSOReader(bool) = 0;
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/// How does the target deal with writing ELF output.
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virtual std::unique_ptr<Writer> getWriter() = 0;
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private:
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ELFLinkingContext &_context;
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};
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} // end namespace elf
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} // end namespace lld
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#endif
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