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source: vbox/trunk/include/iprt/formats/elf32.h@ 81823

Last change on this file since 81823 was 76585, checked in by vboxsync, 6 years ago

*: scm --fix-header-guard-endif

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 6.2 KB
Line 
1/* $Id: elf32.h 76585 2019-01-01 06:31:29Z vboxsync $ */
2/** @file
3 * IPRT - ELF 32-bit header.
4 */
5
6/*
7 * Copyright (C) 2010-2019 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27#ifndef IPRT_INCLUDED_formats_elf32_h
28#define IPRT_INCLUDED_formats_elf32_h
29#ifndef RT_WITHOUT_PRAGMA_ONCE
30# pragma once
31#endif
32
33#include <iprt/assertcompile.h>
34#include "elf-common.h"
35
36/*
37 * ELF 32 standard types.
38 */
39typedef uint32_t Elf32_Addr;
40typedef uint16_t Elf32_Half;
41typedef uint32_t Elf32_Off;
42typedef int32_t Elf32_Sword;
43typedef uint32_t Elf32_Word;
44
45/*
46 * Ensure type size correctness in accordance to .
47 * Portable Format Specification (for ELF), Version 1.1, fig 1-2. .
48 */
49AssertCompileSize(Elf32_Addr, 4);
50AssertCompileSize(Elf32_Half, 2);
51AssertCompileSize(Elf32_Off, 4);
52AssertCompileSize(Elf32_Sword, 4);
53AssertCompileSize(Elf32_Word, 4);
54
55/*
56 * ELF 32 non-standard types for convenience.
57 */
58typedef Elf32_Word Elf32_Size;
59typedef Elf32_Word Elf32_Hashelt;
60
61/*
62 * ELF header.
63 */
64typedef struct
65{
66 unsigned char e_ident[16]; /* ELF identification. */
67 Elf32_Half e_type; /* Object file type. */
68 Elf32_Half e_machine; /* Machine type. */
69 Elf32_Word e_version; /* Object file version. */
70 Elf32_Addr e_entry; /* Entry point address. */
71 Elf32_Off e_phoff; /* Program header offset. */
72 Elf32_Off e_shoff; /* Section header offset. */
73 Elf32_Word e_flags; /* Processor-specific flags. */
74 Elf32_Half e_ehsize; /* ELF header size. */
75 Elf32_Half e_phentsize; /* Size of program header entries. */
76 Elf32_Half e_phnum; /* Number of program headers. */
77 Elf32_Half e_shentsize; /* Size of section header entries. */
78 Elf32_Half e_shnum; /* Number of section headers. */
79 Elf32_Half e_shstrndx; /* Section name string table index. */
80} Elf32_Ehdr;
81
82/*
83 * Section header.
84 */
85typedef struct
86{
87 Elf32_Word sh_name; /* Section name. */
88 Elf32_Word sh_type; /* Section type. */
89 Elf32_Word sh_flags; /* Section attributes. */
90 Elf32_Addr sh_addr; /* Virtual address in memory. */
91 Elf32_Off sh_offset; /* Offset in file. */
92 Elf32_Word sh_size; /* Size of section. */
93 Elf32_Word sh_link; /* Link to other section. */
94 Elf32_Word sh_info; /* Miscellaneous information. */
95 Elf32_Word sh_addralign; /* Address alignment boundary. */
96 Elf32_Word sh_entsize; /* Size of entries, if section has table. */
97} Elf32_Shdr;
98
99
100/*
101 * Program header.
102 */
103typedef struct
104{
105 Elf32_Word p_type; /* Type of segment. */
106 Elf32_Off p_offset; /* Offset in file. */
107 Elf32_Addr p_vaddr; /* Virtual address in memory. */
108 Elf32_Addr p_paddr; /* Physical address (reserved). */
109 Elf32_Word p_filesz; /* Size of segment in file. */
110 Elf32_Word p_memsz; /* Size of segment in memory. */
111 Elf32_Word p_flags; /* Segment attributes. */
112 Elf32_Word p_align; /* Alignment of segment. */
113} Elf32_Phdr;
114
115
116/*
117 * Note header.
118 */
119typedef struct
120{
121 Elf32_Word n_namesz; /* Length of note's name. */
122 Elf32_Word n_descsz; /* Length of note's description. */
123 Elf32_Word n_type; /* Type of note. */
124} Elf32_Nhdr;
125
126
127/*
128 * Symbol table entry.
129 */
130typedef struct
131{
132 Elf32_Word st_name; /* Symbol name. */
133 Elf32_Addr st_value; /* Symbol value. */
134 Elf32_Word st_size; /* Size associated with symbol. */
135 unsigned char st_info; /* Type and binding attributes. */
136 unsigned char st_other; /* Reserved. */
137 Elf32_Half st_shndx; /* Section header table index. */
138} Elf32_Sym;
139
140
141/*
142 * Relocations.
143 */
144typedef struct
145{
146 Elf32_Addr r_offset; /* Location to be relocated. */
147 Elf32_Word r_info; /* Symbol index and type of relocation. */
148} Elf32_Rel;
149
150typedef struct
151{
152 Elf32_Addr r_offset; /* Location to be relocated. */
153 Elf32_Word r_info; /* Symbol index and type of relocation. */
154 Elf32_Sword r_addend; /* Constant part of expression. */
155} Elf32_Rela;
156
157/*
158 * Dynamic section entry.
159 * ".dynamic" section contains an array of this.
160 */
161typedef struct
162{
163 Elf32_Sword d_tag; /* Type of entry. */
164 union
165 {
166 Elf32_Word d_val; /* Integer value. */
167 Elf32_Addr d_ptr; /* Virtual address value. */
168 } d_un;
169} Elf32_Dyn;
170
171/*
172 * Helper macros.
173 */
174/** The symbol's type. */
175#define ELF32_ST_TYPE(info) ((info) & 0xF)
176/** The symbol's binding. */
177#define ELF32_ST_BIND(info) ((info) >> 4)
178/** Make st_info. given binding and type. */
179#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
180
181/** Relocation type. */
182#define ELF32_R_TYPE(info) ((unsigned char)(info))
183/** Relocation symbol index. */
184#define ELF32_R_SYM(info) ((info) >> 8)
185/** Make r_info given the symbol index and type. */
186#define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type))
187
188
189#endif /* !IPRT_INCLUDED_formats_elf32_h */
190
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