1// Copyright (c) 2013 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/*
6 * Copyright (C) 2012 The Android Open Source Project
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *  * Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *  * Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in
16 *    the documentation and/or other materials provided with the
17 *    distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32#ifndef LINKER_PHDR_H
33#define LINKER_PHDR_H
34
35/* Declarations related to the ELF program header table and segments.
36 *
37 * The design goal is to provide an API that is as close as possible
38 * to the ELF spec, and does not depend on linker-specific data
39 * structures (e.g. the exact layout of struct soinfo).
40 */
41
42#include "elf_traits.h"
43
44size_t phdr_table_get_load_size(const ELF::Phdr* phdr_table,
45                                size_t phdr_count,
46                                ELF::Addr* min_vaddr = NULL,
47                                ELF::Addr* max_vaddr = NULL);
48
49int phdr_table_protect_segments(const ELF::Phdr* phdr_table,
50                                int phdr_count,
51                                ELF::Addr load_bias);
52
53int phdr_table_unprotect_segments(const ELF::Phdr* phdr_table,
54                                  int phdr_count,
55                                  ELF::Addr load_bias);
56
57int phdr_table_get_relro_info(const ELF::Phdr* phdr_table,
58                              int phdr_count,
59                              ELF::Addr load_bias,
60                              ELF::Addr* relro_start,
61                              ELF::Addr* relro_size);
62
63int phdr_table_protect_gnu_relro(const ELF::Phdr* phdr_table,
64                                 int phdr_count,
65                                 ELF::Addr load_bias);
66
67#ifdef __arm__
68int phdr_table_get_arm_exidx(const ELF::Phdr* phdr_table,
69                             int phdr_count,
70                             ELF::Addr load_bias,
71                             ELF::Addr** arm_exidx,
72                             unsigned* arm_exidix_count);
73#endif
74
75void phdr_table_get_dynamic_section(const ELF::Phdr* phdr_table,
76                                    int phdr_count,
77                                    ELF::Addr load_bias,
78                                    const ELF::Dyn** dynamic,
79                                    size_t* dynamic_count,
80                                    ELF::Word* dynamic_flags);
81
82#endif /* LINKER_PHDR_H */
83