summaryrefslogtreecommitdiff
path: root/elfcpp/elfcpp_internal.h
blob: 357ccc1937c9fa981c0807a4c46cfabb7437cbf8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
// elfcpp_internal.h -- internals for elfcpp   -*- C++ -*-

// Copyright (C) 2006-2014 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.

// This file is part of elfcpp.
   
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public License
// as published by the Free Software Foundation; either version 2, or
// (at your option) any later version.

// In addition to the permissions in the GNU Library General Public
// License, the Free Software Foundation gives you unlimited
// permission to link the compiled version of this file into
// combinations with other programs, and to distribute those
// combinations without any restriction coming from the use of this
// file.  (The Library Public License restrictions do apply in other
// respects; for example, they cover modification of the file, and
/// distribution when not linked into a combined executable.)

// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.

// You should have received a copy of the GNU Library General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
// 02110-1301, USA.

// This is included by elfcpp.h, the external interface, but holds
// information which we want to keep private.

#ifndef ELFCPP_INTERNAL_H
#define ELFCPP_INTERNAL_H

namespace elfcpp
{

namespace internal
{

// The ELF file header.

template<int size>
struct Ehdr_data
{
  unsigned char e_ident[EI_NIDENT];
  Elf_Half e_type;
  Elf_Half e_machine;
  Elf_Word e_version;
  typename Elf_types<size>::Elf_Addr e_entry;
  typename Elf_types<size>::Elf_Off e_phoff;
  typename Elf_types<size>::Elf_Off e_shoff;
  Elf_Word e_flags;
  Elf_Half e_ehsize;
  Elf_Half e_phentsize;
  Elf_Half e_phnum;
  Elf_Half e_shentsize;
  Elf_Half e_shnum;
  Elf_Half e_shstrndx;
};

// An ELF section header.

template<int size>
struct Shdr_data
{
  Elf_Word sh_name;
  Elf_Word sh_type;
  typename Elf_types<size>::Elf_WXword sh_flags;
  typename Elf_types<size>::Elf_Addr sh_addr;
  typename Elf_types<size>::Elf_Off sh_offset;
  typename Elf_types<size>::Elf_WXword sh_size;
  Elf_Word sh_link;
  Elf_Word sh_info;
  typename Elf_types<size>::Elf_WXword sh_addralign;
  typename Elf_types<size>::Elf_WXword sh_entsize;
};

// An ELF segment header.  We use template specialization for the
// 32-bit and 64-bit versions because the fields are in a different
// order.

template<int size>
struct Phdr_data;

template<>
struct Phdr_data<32>
{
  Elf_Word p_type;
  Elf_types<32>::Elf_Off p_offset;
  Elf_types<32>::Elf_Addr p_vaddr;
  Elf_types<32>::Elf_Addr p_paddr;
  Elf_Word p_filesz;
  Elf_Word p_memsz;
  Elf_Word p_flags;
  Elf_Word p_align;
};

template<>
struct Phdr_data<64>
{
  Elf_Word p_type;
  Elf_Word p_flags;
  Elf_types<64>::Elf_Off p_offset;
  Elf_types<64>::Elf_Addr p_vaddr;
  Elf_types<64>::Elf_Addr p_paddr;
  Elf_Xword p_filesz;
  Elf_Xword p_memsz;
  Elf_Xword p_align;
};

// An ELF symbol table entry.  We use template specialization for the
// 32-bit and 64-bit versions because the fields are in a different
// order.

template<int size>
struct Sym_data;

template<>
struct Sym_data<32>
{
  Elf_Word st_name;
  Elf_types<32>::Elf_Addr st_value;
  Elf_Word st_size;
  unsigned char st_info;
  unsigned char st_other;
  Elf_Half st_shndx;
};

template<>
struct Sym_data<64>
{
  Elf_Word st_name;
  unsigned char st_info;
  unsigned char st_other;
  Elf_Half st_shndx;
  Elf_types<64>::Elf_Addr st_value;
  Elf_Xword st_size;
};

// ELF relocation table entries.

template<int size>
struct Rel_data
{
  typename Elf_types<size>::Elf_Addr r_offset;
  typename Elf_types<size>::Elf_WXword r_info;
};

template<int size>
struct Rela_data
{
  typename Elf_types<size>::Elf_Addr r_offset;
  typename Elf_types<size>::Elf_WXword r_info;
  typename Elf_types<size>::Elf_Swxword r_addend;
};

// An entry in the ELF SHT_DYNAMIC section aka PT_DYNAMIC segment.

template<int size>
struct Dyn_data
{
  typename Elf_types<size>::Elf_Swxword d_tag;
  typename Elf_types<size>::Elf_WXword d_val;
};

// An entry in a SHT_GNU_verdef section.  This structure is the same
// in 32-bit and 64-bit ELF files.

struct Verdef_data
{
  // Version number of structure (VER_DEF_*).
  Elf_Half vd_version;
  // Bit flags (VER_FLG_*).
  Elf_Half vd_flags;
  // Version index.
  Elf_Half vd_ndx;
  // Number of auxiliary Verdaux entries.
  Elf_Half vd_cnt;
  // Hash of name.
  Elf_Word vd_hash;
  // Byte offset to first Verdaux entry.
  Elf_Word vd_aux;
  // Byte offset to next Verdef entry.
  Elf_Word vd_next;
};

// An auxiliary entry in a SHT_GNU_verdef section.  This structure is
// the same in 32-bit and 64-bit ELF files.

struct Verdaux_data
{
  // Offset in string table of version name.
  Elf_Word vda_name;
  // Byte offset to next Verdaux entry.
  Elf_Word vda_next;
};

// An entry in a SHT_GNU_verneed section.  This structure is the same
// in 32-bit and 64-bit ELF files.

struct Verneed_data
{
  // Version number of structure (VER_NEED_*).
  Elf_Half vn_version;
  // Number of auxiliary Vernaux entries.
  Elf_Half vn_cnt;
  // Offset in string table of library name.
  Elf_Word vn_file;
  // Byte offset to first Vernaux entry.
  Elf_Word vn_aux;
  // Byt eoffset to next Verneed entry.
  Elf_Word vn_next;
};

// An auxiliary entry in a SHT_GNU_verneed section.  This structure is
// the same in 32-bit and 64-bit ELF files.

struct Vernaux_data
{
  // Hash of dependency name.
  Elf_Word vna_hash;
  // Bit flags (VER_FLG_*).
  Elf_Half vna_flags;
  // Version index used in SHT_GNU_versym entries.
  Elf_Half vna_other;
  // Offset in string table of version name.
  Elf_Word vna_name;
  // Byte offset to next Vernaux entry.
  Elf_Word vna_next;
};

} // End namespace internal.

} // End namespace elfcpp.

#endif // !defined(ELFCPP_INTERNAL_H)