1 files changed, 59 insertions, 0 deletions
diff --git a/lib/ReaderWriter/ELF/Layout.h b/lib/ReaderWriter/ELF/Layout.h
new file mode 100644
index 000000000000..826cf5035d59
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+++ b/lib/ReaderWriter/ELF/Layout.h
@@ -0,0 +1,59 @@
+//===- 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, 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 in the current layout
+  virtual const AtomLayout *findAtomLayoutByName(StringRef name) const = 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;
+
+public:
+  Layout() {}
+
+  virtual ~Layout() { }
+};
+} // end namespace elf
+} // end namespace lld
+
+#endif