third_party/android_platform/bionic/tools/relocation_packer/src/packer.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Pack relative relocations into a more compact form.
   6
   7 #ifndef TOOLS_RELOCATION_PACKER_SRC_PACKER_H_
   8 #define TOOLS_RELOCATION_PACKER_SRC_PACKER_H_
   9
  10 #include <stdint.h>
  11 #include <vector>
  12
  13 #include "elf.h"
  14
  15 namespace relocation_packer {
  16
  17 // A RelocationPacker packs vectors of relocations into more
  18 // compact forms, and unpacks them to reproduce the pre-packed data.
  19 template <typename ELF>
  20 class RelocationPacker {
  21  public:
  22   // Pack relocations into a more compact form.
  23   // |relocations| is a vector of relocation structs.
  24   // |packed| is the vector of packed bytes into which relocations are packed.
  25   static void PackRelocations(const std::vector<typename ELF::Rela>& relocations,
  26                               std::vector<uint8_t>* packed);
  27
  28   // Unpack relocations from their more compact form.
  29   // |packed| is the vector of packed relocations.
  30   // |relocations| is a vector of unpacked relocation structs.
  31   static void UnpackRelocations(const std::vector<uint8_t>& packed,
  32                                 std::vector<typename ELF::Rela>* relocations);
  33 };
  34
  35 }  // namespace relocation_packer
  36
  37 #endif  // TOOLS_RELOCATION_PACKER_SRC_PACKER_H_