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//===- lib/ReaderWriter/ELF/Layout.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_LAYOUT_H
#define LLD_READER_WRITER_ELF_LAYOUT_H
#include "lld/Core/DefinedAtom.h"
#include "lld/ReaderWriter/AtomLayout.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/ErrorOr.h"
namespace lld {
namespace elf {
/// \brief The ELFLayout is an abstract class for managing the final layout for
/// the kind of binaries(Shared Libraries / Relocatables / Executables 0
/// Each architecture (Hexagon, PowerPC, MIPS) would have a concrete
/// subclass derived from Layout for generating each binary thats
// needed by the lld linker
class Layout {
public:
typedef uint32_t SectionOrder;
typedef uint32_t SegmentType;
typedef uint32_t Flags;
public:
/// Return the order the section would appear in the output file
virtual SectionOrder getSectionOrder(StringRef name, int32_t contentType,
int32_t contentPerm) = 0;
/// \brief Append the Atom to the layout and create appropriate sections.
/// \returns A reference to the atom layout or an error. The atom layout will
/// be updated as linking progresses.
virtual ErrorOr<const lld::AtomLayout &> addAtom(const Atom *atom) = 0;
/// find the Atom Address in the current layout
virtual bool findAtomAddrByName(StringRef name, uint64_t &addr) = 0;
/// associates a section to a segment
virtual void assignSectionsToSegments() = 0;
/// associates a virtual address to the segment, section, and the atom
virtual void assignVirtualAddress() = 0;
/// associates a file offset to the segment, section and the atom
virtual void assignFileOffsets() = 0;
public:
Layout() {}
virtual ~Layout() { }
};
} // end namespace elf
} // end namespace lld
#endif
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