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//===- lib/ReaderWriter/ELF/ELFChunks.h ---------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_READER_WRITER_ELF_CHUNKS_H_
#define LLD_READER_WRITER_ELF_CHUNKS_H_
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Object/ELF.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileOutputBuffer.h"
namespace lld {
namespace elf {
class ELFWriter;
/// \brief A chunk is a contiguous region of space
template<class ELFT>
class Chunk {
public:
/// \brief Describes the type of Chunk
enum Kind {
K_ELFHeader, // ELF Header
K_ELFProgramHeader, // Program Header
K_ELFSegment, // Segment
K_ELFSection, // Section
K_ELFSectionHeader // Section header
};
Chunk(llvm::StringRef name, Kind kind)
: _name(name)
, _kind(kind)
, _fsize(0)
, _msize(0)
, _align2(0)
, _order(0)
, _ordinal(1)
, _start(0)
, _fileoffset(0) {}
virtual ~Chunk() {}
// Does the chunk occupy disk space
virtual bool occupiesNoDiskSpace() const {
return false;
}
// The name of the chunk
llvm::StringRef name() const { return _name; }
// Kind of chunk
Kind kind() const { return _kind; }
uint64_t fileSize() const { return _fsize; }
uint64_t align2() const { return _align2; }
void appendAtom() const;
// The ordinal value of the chunk
uint64_t ordinal() const { return _ordinal;}
void setOrdinal(uint64_t newVal) { _ordinal = newVal;}
// The order in which the chunk would appear in the output file
uint64_t order() const { return _order; }
void setOrder(uint32_t order) { _order = order; }
// Output file offset of the chunk
uint64_t fileOffset() const { return _fileoffset; }
void setFileOffset(uint64_t offset) { _fileoffset = offset; }
// Output start address of the chunk
void setVAddr(uint64_t start) { _start = start; }
uint64_t virtualAddr() const { return _start; }
// Does the chunk occupy memory during execution ?
uint64_t memSize() const { return _msize; }
void setMemSize(uint64_t msize) { _msize = msize; }
// Writer the chunk
virtual void write(ELFWriter *writer, llvm::FileOutputBuffer &buffer) = 0;
// Finalize the chunk before writing
virtual void finalize() = 0;
protected:
llvm::StringRef _name;
Kind _kind;
uint64_t _fsize;
uint64_t _msize;
uint64_t _align2;
uint32_t _order;
uint64_t _ordinal;
uint64_t _start;
uint64_t _fileoffset;
};
} // elf
} // lld
#endif // LLD_READER_WRITER_ELF_CHUNKS_H_
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