1// elfcpp_internal.h -- internals for elfcpp   -*- C++ -*-
2
3// Copyright 2006, 2007, Free Software Foundation, Inc.
4// Written by Ian Lance Taylor <iant@google.com>.
5
6// This file is part of elfcpp.
7
8// This program is free software; you can redistribute it and/or
9// modify it under the terms of the GNU Library General Public License
10// as published by the Free Software Foundation; either version 2, or
11// (at your option) any later version.
12
13// In addition to the permissions in the GNU Library General Public
14// License, the Free Software Foundation gives you unlimited
15// permission to link the compiled version of this file into
16// combinations with other programs, and to distribute those
17// combinations without any restriction coming from the use of this
18// file.  (The Library Public License restrictions do apply in other
19// respects; for example, they cover modification of the file, and
20/// distribution when not linked into a combined executable.)
21
22// This program is distributed in the hope that it will be useful, but
23// WITHOUT ANY WARRANTY; without even the implied warranty of
24// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
25// Library General Public License for more details.
26
27// You should have received a copy of the GNU Library General Public
28// License along with this program; if not, write to the Free Software
29// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
30// 02110-1301, USA.
31
32// This is included by elfcpp.h, the external interface, but holds
33// information which we want to keep private.
34
35#ifndef ELFCPP_INTERNAL_H
36#define ELFCPP_INTERNAL_H
37
38namespace elfcpp
39{
40
41namespace internal
42{
43
44// The ELF file header.
45
46template<int size>
47struct Ehdr_data
48{
49  unsigned char e_ident[EI_NIDENT];
50  Elf_Half e_type;
51  Elf_Half e_machine;
52  Elf_Word e_version;
53  typename Elf_types<size>::Elf_Addr e_entry;
54  typename Elf_types<size>::Elf_Off e_phoff;
55  typename Elf_types<size>::Elf_Off e_shoff;
56  Elf_Word e_flags;
57  Elf_Half e_ehsize;
58  Elf_Half e_phentsize;
59  Elf_Half e_phnum;
60  Elf_Half e_shentsize;
61  Elf_Half e_shnum;
62  Elf_Half e_shstrndx;
63};
64
65// An ELF section header.
66
67template<int size>
68struct Shdr_data
69{
70  Elf_Word sh_name;
71  Elf_Word sh_type;
72  typename Elf_types<size>::Elf_WXword sh_flags;
73  typename Elf_types<size>::Elf_Addr sh_addr;
74  typename Elf_types<size>::Elf_Off sh_offset;
75  typename Elf_types<size>::Elf_WXword sh_size;
76  Elf_Word sh_link;
77  Elf_Word sh_info;
78  typename Elf_types<size>::Elf_WXword sh_addralign;
79  typename Elf_types<size>::Elf_WXword sh_entsize;
80};
81
82// An ELF segment header.  We use template specialization for the
83// 32-bit and 64-bit versions because the fields are in a different
84// order.
85
86template<int size>
87struct Phdr_data;
88
89template<>
90struct Phdr_data<32>
91{
92  Elf_Word p_type;
93  Elf_types<32>::Elf_Off p_offset;
94  Elf_types<32>::Elf_Addr p_vaddr;
95  Elf_types<32>::Elf_Addr p_paddr;
96  Elf_Word p_filesz;
97  Elf_Word p_memsz;
98  Elf_Word p_flags;
99  Elf_Word p_align;
100};
101
102template<>
103struct Phdr_data<64>
104{
105  Elf_Word p_type;
106  Elf_Word p_flags;
107  Elf_types<64>::Elf_Off p_offset;
108  Elf_types<64>::Elf_Addr p_vaddr;
109  Elf_types<64>::Elf_Addr p_paddr;
110  Elf_Xword p_filesz;
111  Elf_Xword p_memsz;
112  Elf_Xword p_align;
113};
114
115// An ELF symbol table entry.  We use template specialization for the
116// 32-bit and 64-bit versions because the fields are in a different
117// order.
118
119template<int size>
120struct Sym_data;
121
122template<>
123struct Sym_data<32>
124{
125  Elf_Word st_name;
126  Elf_types<32>::Elf_Addr st_value;
127  Elf_Word st_size;
128  unsigned char st_info;
129  unsigned char st_other;
130  Elf_Half st_shndx;
131};
132
133template<>
134struct Sym_data<64>
135{
136  Elf_Word st_name;
137  unsigned char st_info;
138  unsigned char st_other;
139  Elf_Half st_shndx;
140  Elf_types<64>::Elf_Addr st_value;
141  Elf_Xword st_size;
142};
143
144// ELF relocation table entries.
145
146template<int size>
147struct Rel_data
148{
149  typename Elf_types<size>::Elf_Addr r_offset;
150  typename Elf_types<size>::Elf_WXword r_info;
151};
152
153template<int size>
154struct Rela_data
155{
156  typename Elf_types<size>::Elf_Addr r_offset;
157  typename Elf_types<size>::Elf_WXword r_info;
158  typename Elf_types<size>::Elf_Swxword r_addend;
159};
160
161// An entry in the ELF SHT_DYNAMIC section aka PT_DYNAMIC segment.
162
163template<int size>
164struct Dyn_data
165{
166  typename Elf_types<size>::Elf_Swxword d_tag;
167  typename Elf_types<size>::Elf_WXword d_val;
168};
169
170// An entry in a SHT_GNU_verdef section.  This structure is the same
171// in 32-bit and 64-bit ELF files.
172
173struct Verdef_data
174{
175  // Version number of structure (VER_DEF_*).
176  Elf_Half vd_version;
177  // Bit flags (VER_FLG_*).
178  Elf_Half vd_flags;
179  // Version index.
180  Elf_Half vd_ndx;
181  // Number of auxiliary Verdaux entries.
182  Elf_Half vd_cnt;
183  // Hash of name.
184  Elf_Word vd_hash;
185  // Byte offset to first Verdaux entry.
186  Elf_Word vd_aux;
187  // Byte offset to next Verdef entry.
188  Elf_Word vd_next;
189};
190
191// An auxiliary entry in a SHT_GNU_verdef section.  This structure is
192// the same in 32-bit and 64-bit ELF files.
193
194struct Verdaux_data
195{
196  // Offset in string table of version name.
197  Elf_Word vda_name;
198  // Byte offset to next Verdaux entry.
199  Elf_Word vda_next;
200};
201
202// An entry in a SHT_GNU_verneed section.  This structure is the same
203// in 32-bit and 64-bit ELF files.
204
205struct Verneed_data
206{
207  // Version number of structure (VER_NEED_*).
208  Elf_Half vn_version;
209  // Number of auxiliary Vernaux entries.
210  Elf_Half vn_cnt;
211  // Offset in string table of library name.
212  Elf_Word vn_file;
213  // Byte offset to first Vernaux entry.
214  Elf_Word vn_aux;
215  // Byt eoffset to next Verneed entry.
216  Elf_Word vn_next;
217};
218
219// An auxiliary entry in a SHT_GNU_verneed section.  This structure is
220// the same in 32-bit and 64-bit ELF files.
221
222struct Vernaux_data
223{
224  // Hash of dependency name.
225  Elf_Word vna_hash;
226  // Bit flags (VER_FLG_*).
227  Elf_Half vna_flags;
228  // Version index used in SHT_GNU_versym entries.
229  Elf_Half vna_other;
230  // Offset in string table of version name.
231  Elf_Word vna_name;
232  // Byte offset to next Vernaux entry.
233  Elf_Word vna_next;
234};
235
236} // End namespace internal.
237
238} // End namespace elfcpp.
239
240#endif // !defined(ELFCPP_INTERNAL_H)
241