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