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/6.1/sys/sys/elf64.h 158179 2006-04-30 16:44:43Z cvs2svn $
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 uint64_t Elf64_Addr;
39 typedef uint16_t Elf64_Half;
40 typedef uint64_t Elf64_Off;
41 typedef int32_t Elf64_Sword;
42 typedef int64_t Elf64_Sxword;
43 typedef uint32_t Elf64_Word;
44 typedef uint64_t Elf64_Xword;
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_Word Elf64_Hashelt;
57 #endif
58
59 /* Non-standard class-dependent datatype used for abstraction. */
60 typedef Elf64_Xword Elf64_Size;
61 typedef Elf64_Sxword Elf64_Ssize;
62
63 /*
64 * ELF header.
65 */
66
67 typedef struct {
68 unsigned char e_ident[EI_NIDENT]; /* File identification. */
69 Elf64_Half e_type; /* File type. */
70 Elf64_Half e_machine; /* Machine architecture. */
71 Elf64_Word e_version; /* ELF format version. */
72 Elf64_Addr e_entry; /* Entry point. */
73 Elf64_Off e_phoff; /* Program header file offset. */
74 Elf64_Off e_shoff; /* Section header file offset. */
75 Elf64_Word e_flags; /* Architecture-specific flags. */
76 Elf64_Half e_ehsize; /* Size of ELF header in bytes. */
77 Elf64_Half e_phentsize; /* Size of program header entry. */
78 Elf64_Half e_phnum; /* Number of program header entries. */
79 Elf64_Half e_shentsize; /* Size of section header entry. */
80 Elf64_Half e_shnum; /* Number of section header entries. */
81 Elf64_Half e_shstrndx; /* Section name strings section. */
82 } Elf64_Ehdr;
83
84 /*
85 * Section header.
86 */
87
88 typedef struct {
89 Elf64_Word sh_name; /* Section name (index into the
90 section header string table). */
91 Elf64_Word sh_type; /* Section type. */
92 Elf64_Xword sh_flags; /* Section flags. */
93 Elf64_Addr sh_addr; /* Address in memory image. */
94 Elf64_Off sh_offset; /* Offset in file. */
95 Elf64_Xword sh_size; /* Size in bytes. */
96 Elf64_Word sh_link; /* Index of a related section. */
97 Elf64_Word sh_info; /* Depends on section type. */
98 Elf64_Xword sh_addralign; /* Alignment in bytes. */
99 Elf64_Xword sh_entsize; /* Size of each entry in section. */
100 } Elf64_Shdr;
101
102 /*
103 * Program header.
104 */
105
106 typedef struct {
107 Elf64_Word p_type; /* Entry type. */
108 Elf64_Word p_flags; /* Access permission flags. */
109 Elf64_Off p_offset; /* File offset of contents. */
110 Elf64_Addr p_vaddr; /* Virtual address in memory image. */
111 Elf64_Addr p_paddr; /* Physical address (not used). */
112 Elf64_Xword p_filesz; /* Size of contents in file. */
113 Elf64_Xword p_memsz; /* Size of contents in memory. */
114 Elf64_Xword p_align; /* Alignment in memory and file. */
115 } Elf64_Phdr;
116
117 /*
118 * Dynamic structure. The ".dynamic" section contains an array of them.
119 */
120
121 typedef struct {
122 Elf64_Sxword d_tag; /* Entry type. */
123 union {
124 Elf64_Xword d_val; /* Integer value. */
125 Elf64_Addr d_ptr; /* Address value. */
126 } d_un;
127 } Elf64_Dyn;
128
129 /*
130 * Relocation entries.
131 */
132
133 /* Relocations that don't need an addend field. */
134 typedef struct {
135 Elf64_Addr r_offset; /* Location to be relocated. */
136 Elf64_Xword r_info; /* Relocation type and symbol index. */
137 } Elf64_Rel;
138
139 /* Relocations that need an addend field. */
140 typedef struct {
141 Elf64_Addr r_offset; /* Location to be relocated. */
142 Elf64_Xword r_info; /* Relocation type and symbol index. */
143 Elf64_Sxword r_addend; /* Addend. */
144 } Elf64_Rela;
145
146 /* Macros for accessing the fields of r_info. */
147 #define ELF64_R_SYM(info) ((info) >> 32)
148 #define ELF64_R_TYPE(info) ((info) & 0xffffffffL)
149
150 /* Macro for constructing r_info from field values. */
151 #define ELF64_R_INFO(sym, type) (((sym) << 32) + ((type) & 0xffffffffL))
152
153 /*
154 * Symbol table entries.
155 */
156
157 typedef struct {
158 Elf64_Word st_name; /* String table index of name. */
159 unsigned char st_info; /* Type and binding information. */
160 unsigned char st_other; /* Reserved (not used). */
161 Elf64_Half st_shndx; /* Section index of symbol. */
162 Elf64_Addr st_value; /* Symbol value. */
163 Elf64_Xword st_size; /* Size of associated object. */
164 } Elf64_Sym;
165
166 /* Macros for accessing the fields of st_info. */
167 #define ELF64_ST_BIND(info) ((info) >> 4)
168 #define ELF64_ST_TYPE(info) ((info) & 0xf)
169
170 /* Macro for constructing st_info from field values. */
171 #define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
172
173 /* Macro for accessing the fields of st_other. */
174 #define ELF64_ST_VISIBILITY(oth) ((oth) & 0x3)
175
176 #endif /* !_SYS_ELF64_H_ */
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