ac23808619
This would permit the ELF reader to check the architecture that is being selected by the linking process. This patch also sorts the include files according to LLVM conventions. llvm-svn: 220129
80 lines
2.6 KiB
C++
80 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 std::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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