FreeBSD/Linux Kernel Cross Reference
sys/sys/elf64.h
1 /*-
2 * Copyright (c) 1996-1998 John D. Polstra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/6.0/sys/sys/elf64.h 97564 2002-05-30 08:32:18Z dfr $
27 */
28
29 #ifndef _SYS_ELF64_H_
30 #define _SYS_ELF64_H_ 1
31
32 #include <sys/elf_common.h>
33
34 /*
35 * ELF definitions common to all 64-bit architectures.
36 */
37
38 typedef u_int64_t Elf64_Addr;
39 typedef u_int32_t Elf64_Half;
40 typedef u_int64_t Elf64_Off;
41 typedef int64_t Elf64_Sword;
42 typedef u_int64_t Elf64_Word;
43 typedef u_int64_t Elf64_Size;
44 typedef u_int16_t Elf64_Quarter;
45
46 /*
47 * Types of dynamic symbol hash table bucket and chain elements.
48 *
49 * This is inconsistent among 64 bit architectures, so a machine dependent
50 * typedef is required.
51 */
52
53 #ifdef __alpha__
54 typedef Elf64_Off Elf64_Hashelt;
55 #else
56 typedef Elf64_Half Elf64_Hashelt;
57 #endif
58
59 /*
60 * ELF header.
61 */
62
63 typedef struct {
64 unsigned char e_ident[EI_NIDENT]; /* File identification. */
65 Elf64_Quarter e_type; /* File type. */
66 Elf64_Quarter e_machine; /* Machine architecture. */
67 Elf64_Half e_version; /* ELF format version. */
68 Elf64_Addr e_entry; /* Entry point. */
69 Elf64_Off e_phoff; /* Program header file offset. */
70 Elf64_Off e_shoff; /* Section header file offset. */
71 Elf64_Half e_flags; /* Architecture-specific flags. */
72 Elf64_Quarter e_ehsize; /* Size of ELF header in bytes. */
73 Elf64_Quarter e_phentsize; /* Size of program header entry. */
74 Elf64_Quarter e_phnum; /* Number of program header entries. */
75 Elf64_Quarter e_shentsize; /* Size of section header entry. */
76 Elf64_Quarter e_shnum; /* Number of section header entries. */
77 Elf64_Quarter e_shstrndx; /* Section name strings section. */
78 } Elf64_Ehdr;
79
80 /*
81 * Section header.
82 */
83
84 typedef struct {
85 Elf64_Half sh_name; /* Section name (index into the
86 section header string table). */
87 Elf64_Half sh_type; /* Section type. */
88 Elf64_Size sh_flags; /* Section flags. */
89 Elf64_Addr sh_addr; /* Address in memory image. */
90 Elf64_Off sh_offset; /* Offset in file. */
91 Elf64_Size sh_size; /* Size in bytes. */
92 Elf64_Half sh_link; /* Index of a related section. */
93 Elf64_Half sh_info; /* Depends on section type. */
94 Elf64_Size sh_addralign; /* Alignment in bytes. */
95 Elf64_Size sh_entsize; /* Size of each entry in section. */
96 } Elf64_Shdr;
97
98 /*
99 * Program header.
100 */
101
102 typedef struct {
103 Elf64_Half p_type; /* Entry type. */
104 Elf64_Half p_flags; /* Access permission flags. */
105 Elf64_Off p_offset; /* File offset of contents. */
106 Elf64_Addr p_vaddr; /* Virtual address in memory image. */
107 Elf64_Addr p_paddr; /* Physical address (not used). */
108 Elf64_Size p_filesz; /* Size of contents in file. */
109 Elf64_Size p_memsz; /* Size of contents in memory. */
110 Elf64_Size p_align; /* Alignment in memory and file. */
111 } Elf64_Phdr;
112
113 /*
114 * Dynamic structure. The ".dynamic" section contains an array of them.
115 */
116
117 typedef struct {
118 Elf64_Size d_tag; /* Entry type. */
119 union {
120 Elf64_Size d_val; /* Integer value. */
121 Elf64_Addr d_ptr; /* Address value. */
122 } d_un;
123 } Elf64_Dyn;
124
125 /*
126 * Relocation entries.
127 */
128
129 /* Relocations that don't need an addend field. */
130 typedef struct {
131 Elf64_Addr r_offset; /* Location to be relocated. */
132 Elf64_Size r_info; /* Relocation type and symbol index. */
133 } Elf64_Rel;
134
135 /* Relocations that need an addend field. */
136 typedef struct {
137 Elf64_Addr r_offset; /* Location to be relocated. */
138 Elf64_Size r_info; /* Relocation type and symbol index. */
139 Elf64_Off r_addend; /* Addend. */
140 } Elf64_Rela;
141
142 /* Macros for accessing the fields of r_info. */
143 #define ELF64_R_SYM(info) ((info) >> 32)
144 #define ELF64_R_TYPE(info) ((unsigned char)(info))
145
146 /* Macro for constructing r_info from field values. */
147 #define ELF64_R_INFO(sym, type) (((sym) << 32) + (unsigned char)(type))
148
149 /*
150 * Symbol table entries.
151 */
152
153 typedef struct {
154 Elf64_Half st_name; /* String table index of name. */
155 unsigned char st_info; /* Type and binding information. */
156 unsigned char st_other; /* Reserved (not used). */
157 Elf64_Quarter st_shndx; /* Section index of symbol. */
158 Elf64_Addr st_value; /* Symbol value. */
159 Elf64_Size st_size; /* Size of associated object. */
160 } Elf64_Sym;
161
162 /* Macros for accessing the fields of st_info. */
163 #define ELF64_ST_BIND(info) ((info) >> 4)
164 #define ELF64_ST_TYPE(info) ((info) & 0xf)
165
166 /* Macro for constructing st_info from field values. */
167 #define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
168
169 #endif /* !_SYS_ELF64_H_ */
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