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source: vbox/trunk/include/iprt/formats/elf64.h@ 103224

Last change on this file since 103224 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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1/* $Id: elf64.h 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * IPRT - ELF 64-bit header.
4 */
5
6/*
7 * Copyright (C) 2010-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37#ifndef IPRT_INCLUDED_formats_elf64_h
38#define IPRT_INCLUDED_formats_elf64_h
39#ifndef RT_WITHOUT_PRAGMA_ONCE
40# pragma once
41#endif
42
43#include <iprt/assertcompile.h>
44#include "elf-common.h"
45
46/*
47 * ELF 64 standard types.
48 */
49typedef uint64_t Elf64_Addr;
50typedef uint64_t Elf64_Off;
51typedef uint16_t Elf64_Half;
52typedef uint32_t Elf64_Word;
53typedef int32_t Elf64_Sword;
54typedef uint64_t Elf64_Xword;
55typedef int64_t Elf64_Sxword;
56
57/*
58 * Ensure type size correctness in accordance to ELF-64 Object File Format, Version 1.5 Draft 2, p2.
59 */
60AssertCompileSize(Elf64_Addr, 8);
61AssertCompileSize(Elf64_Off, 8);
62AssertCompileSize(Elf64_Half, 2);
63AssertCompileSize(Elf64_Word, 4);
64AssertCompileSize(Elf64_Sword, 4);
65AssertCompileSize(Elf64_Xword, 8);
66AssertCompileSize(Elf64_Sxword, 8);
67
68/*
69 * ELF 64 non-standard types for convenience.
70 */
71typedef Elf64_Xword Elf64_Size;
72typedef Elf64_Word Elf64_Hashelt;
73
74/*
75 * ELF Header.
76 */
77typedef struct
78{
79 unsigned char e_ident[16]; /* ELF identification. */
80 Elf64_Half e_type; /* Object file type. */
81 Elf64_Half e_machine; /* Machine type. */
82 Elf64_Word e_version; /* Object file version. */
83 Elf64_Addr e_entry; /* Entry point address. */
84 Elf64_Off e_phoff; /* Program header offset. */
85 Elf64_Off e_shoff; /* Section header offset. */
86 Elf64_Word e_flags; /* Processor-specific flags. */
87 Elf64_Half e_ehsize; /* ELF header size. */
88 Elf64_Half e_phentsize; /* Size of program header entry. */
89 Elf64_Half e_phnum; /* Number of program header entries. */
90 Elf64_Half e_shentsize; /* Size of section header entry. */
91 Elf64_Half e_shnum; /* Number of section header entries. */
92 Elf64_Half e_shstrndx; /* Section name string table index. */
93} Elf64_Ehdr;
94
95/*
96 * Section header.
97 */
98typedef struct
99{
100 Elf64_Word sh_name; /* Section name. */
101 Elf64_Word sh_type; /* Section type. */
102 Elf64_Xword sh_flags; /* Section attributes. */
103 Elf64_Addr sh_addr; /* Virtual address in memory. */
104 Elf64_Off sh_offset; /* Offset in file. */
105 Elf64_Xword sh_size; /* Size of section. */
106 Elf64_Word sh_link; /* Link to other section. */
107 Elf64_Word sh_info; /* Miscellaneous information. */
108 Elf64_Xword sh_addralign; /* Address alignment boundary. */
109 Elf64_Xword sh_entsize; /* Size of entries, if section has table. */
110} Elf64_Shdr;
111
112/*
113 * Program header.
114 */
115typedef struct
116{
117 Elf64_Word p_type; /* Type of segment. */
118 Elf64_Word p_flags; /* Segment attributes. */
119 Elf64_Off p_offset; /* Offset in file. */
120 Elf64_Addr p_vaddr; /* Virtual address in memory. */
121 Elf64_Addr p_paddr; /* Physical address (reserved). */
122 Elf64_Xword p_filesz; /* Size of segment in file. */
123 Elf64_Xword p_memsz; /* Size of segment in memory. */
124 Elf64_Xword p_align; /* Alignment of segment. */
125} Elf64_Phdr;
126
127/*
128 * Note header.
129 */
130typedef struct
131{
132 Elf64_Word n_namesz; /* Length of note's name. */
133 Elf64_Word n_descsz; /* Length of note's description. */
134 Elf64_Word n_type; /* Type of note. */
135} Elf64_Nhdr;
136
137/*
138 * Symbol table entry.
139 */
140typedef struct
141{
142 Elf64_Word st_name; /* Symbol name. */
143 unsigned char st_info; /* Type and binding attributes. */
144 unsigned char st_other; /* Reserved. */
145 Elf64_Half st_shndx; /* Section header table index. */
146 Elf64_Addr st_value; /* Symbol value. */
147 Elf64_Xword st_size; /* Size associated with symbol. */
148} Elf64_Sym;
149
150/*
151 * Relocations.
152 */
153typedef struct
154{
155 Elf64_Addr r_offset; /* Location to be relocated. */
156 Elf64_Xword r_info; /* Symbol index and type of relocation. */
157} Elf64_Rel;
158
159typedef struct
160{
161 Elf64_Addr r_offset; /* Location to be relocated. */
162 Elf64_Xword r_info; /* Symbol index and type of relocation. */
163 Elf64_Sxword r_addend; /* Constant part of expression. */
164} Elf64_Rela;
165
166/*
167 * Dynamic section entry.
168 * ".dynamic" section contains an array of this.
169 */
170typedef struct
171{
172 Elf64_Sxword d_tag; /* Type of entry. */
173 union
174 {
175 Elf64_Xword d_val; /* Integer value. */
176 Elf64_Addr d_ptr; /* Virtual address value. */
177 } d_un;
178} Elf64_Dyn;
179
180/*
181 * Helper macros.
182 */
183/** The symbol's type. */
184#define ELF64_ST_TYPE(info) ((info) & 0xF)
185/** The symbol's binding. */
186#define ELF64_ST_BIND(info) ((info) >> 4)
187/** Make st_info. given binding and type. */
188#define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
189
190/** Relocation type. */
191#define ELF64_R_TYPE(info) ((unsigned char)(info))
192/** Relocation symbol index. */
193#define ELF64_R_SYM(info) ((info) >> 32)
194/** Make r_info given the symbol index and type. */
195#define ELF64_R_INFO(sym, type) (((sym) << 32) + (unsigned char)(type))
196
197
198#endif /* !IPRT_INCLUDED_formats_elf64_h */
199
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