102 lines
3.4 KiB
C++
102 lines
3.4 KiB
C++
//===- lib/ReaderWriter/ELF/Chunks.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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#ifndef LLD_READER_WRITER_ELF_CHUNKS_H
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#define LLD_READER_WRITER_ELF_CHUNKS_H
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#include "lld/Core/LLVM.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Object/ELF.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ELF.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileOutputBuffer.h"
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namespace lld {
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class ELFLinkingContext;
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namespace elf {
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class ELFWriter;
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template <class ELFT> class TargetLayout;
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/// \brief A chunk is a contiguous region of space
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template<class ELFT>
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class Chunk {
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public:
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/// \brief Describes the type of Chunk
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enum Kind : uint8_t{ ELFHeader, ///< ELF Header
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ProgramHeader, ///< Program Header
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SectionHeader, ///< Section header
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ELFSegment, ///< Segment
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ELFSection, ///< Section
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AtomSection ///< A section containing atoms.
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};
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/// \brief the ContentType of the chunk
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enum ContentType : uint8_t{ Unknown, Header, Code, Data, Note, TLS };
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Chunk(StringRef name, Kind kind, const ELFLinkingContext &context)
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: _name(name), _kind(kind), _fsize(0), _msize(0), _align2(0), _order(0),
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_ordinal(1), _start(0), _fileoffset(0), _context(context) {}
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virtual ~Chunk() {}
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// The name of the chunk
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StringRef name() const { return _name; }
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// Kind of chunk
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Kind kind() const { return _kind; }
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uint64_t fileSize() const { return _fsize; }
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void setAlign(uint64_t align) { _align2 = align; }
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uint64_t align2() const { return _align2; }
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// The ordinal value of the chunk
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uint64_t ordinal() const { return _ordinal;}
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void setOrdinal(uint64_t newVal) { _ordinal = newVal;}
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// The order in which the chunk would appear in the output file
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uint64_t order() const { return _order; }
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void setOrder(uint32_t order) { _order = order; }
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// Output file offset of the chunk
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uint64_t fileOffset() const { return _fileoffset; }
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void setFileOffset(uint64_t offset) { _fileoffset = offset; }
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// Output start address of the chunk
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void setVAddr(uint64_t start) { _start = start; }
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uint64_t virtualAddr() const { return _start; }
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// Memory size of the chunk
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uint64_t memSize() const { return _msize; }
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void setMemSize(uint64_t msize) { _msize = msize; }
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// Whats the contentType of the chunk ?
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virtual int getContentType() const = 0;
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// Writer the chunk
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virtual void write(ELFWriter *writer, TargetLayout<ELFT> &layout,
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llvm::FileOutputBuffer &buffer) = 0;
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// Finalize the chunk before assigning offsets/virtual addresses
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virtual void doPreFlight() = 0;
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// Finalize the chunk before writing
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virtual void finalize() = 0;
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protected:
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StringRef _name;
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Kind _kind;
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uint64_t _fsize;
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uint64_t _msize;
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uint64_t _align2;
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uint32_t _order;
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uint64_t _ordinal;
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uint64_t _start;
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uint64_t _fileoffset;
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const 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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