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_
38