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elf32.h
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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: src/sys/sys/elf32.h,v 1.8 2002/05/30 08:32:18 dfr Exp $
27  */
28 
29 #ifndef _SYS_ELF32_H_
30 #define _SYS_ELF32_H_ 1
31 
32 /*
33  * ELF definitions common to all 32-bit architectures.
34  */
35 
43 
44 /*
45  * ELF header.
46  */
47 
48 typedef struct {
49  unsigned char e_ident[EI_NIDENT]; /* File identification. */
50  Elf32_Half e_type; /* File type. */
51  Elf32_Half e_machine; /* Machine architecture. */
52  Elf32_Word e_version; /* ELF format version. */
53  Elf32_Addr e_entry; /* Entry point. */
54  Elf32_Off e_phoff; /* Program header file offset. */
55  Elf32_Off e_shoff; /* Section header file offset. */
56  Elf32_Word e_flags; /* Architecture-specific flags. */
57  Elf32_Half e_ehsize; /* Size of ELF header in bytes. */
58  Elf32_Half e_phentsize; /* Size of program header entry. */
59  Elf32_Half e_phnum; /* Number of program header entries. */
60  Elf32_Half e_shentsize; /* Size of section header entry. */
61  Elf32_Half e_shnum; /* Number of section header entries. */
62  Elf32_Half e_shstrndx; /* Section name strings section. */
63 } Elf32_Ehdr;
64 
65 /*
66  * Section header.
67  */
68 
69 typedef struct {
70  Elf32_Word sh_name; /* Section name (index into the
71  section header string table). */
72  Elf32_Word sh_type; /* Section type. */
73  Elf32_Word sh_flags; /* Section flags. */
74  Elf32_Addr sh_addr; /* Address in memory image. */
75  Elf32_Off sh_offset; /* Offset in file. */
76  Elf32_Size sh_size; /* Size in bytes. */
77  Elf32_Word sh_link; /* Index of a related section. */
78  Elf32_Word sh_info; /* Depends on section type. */
79  Elf32_Size sh_addralign; /* Alignment in bytes. */
80  Elf32_Size sh_entsize; /* Size of each entry in section. */
81 } Elf32_Shdr;
82 
83 /*
84  * Program header.
85  */
86 
87 typedef struct {
88  Elf32_Word p_type; /* Entry type. */
89  Elf32_Off p_offset; /* File offset of contents. */
90  Elf32_Addr p_vaddr; /* Virtual address in memory image. */
91  Elf32_Addr p_paddr; /* Physical address (not used). */
92  Elf32_Size p_filesz; /* Size of contents in file. */
93  Elf32_Size p_memsz; /* Size of contents in memory. */
94  Elf32_Word p_flags; /* Access permission flags. */
95  Elf32_Size p_align; /* Alignment in memory and file. */
96 } Elf32_Phdr;
97 
98 /*
99  * Dynamic structure. The ".dynamic" section contains an array of them.
100  */
101 
102 typedef struct {
103  Elf32_Sword d_tag; /* Entry type. */
104  union {
105  Elf32_Size d_val; /* Integer value. */
106  Elf32_Addr d_ptr; /* Address value. */
107  } d_un;
108 } Elf32_Dyn;
109 
110 /*
111  * Relocation entries.
112  */
113 
114 /* Relocations that don't need an addend field. */
115 typedef struct {
116  Elf32_Addr r_offset; /* Location to be relocated. */
117  Elf32_Word r_info; /* Relocation type and symbol index. */
118 } Elf32_Rel;
119 
120 /* Relocations that need an addend field. */
121 typedef struct {
122  Elf32_Addr r_offset; /* Location to be relocated. */
123  Elf32_Word r_info; /* Relocation type and symbol index. */
124  Elf32_Sword r_addend; /* Addend. */
125 } Elf32_Rela;
126 
127 /* Macros for accessing the fields of r_info. */
128 #define ELF32_R_SYM(info) ((info) >> 8)
129 #define ELF32_R_TYPE(info) ((unsigned char)(info))
130 
131 /* Macro for constructing r_info from field values. */
132 #define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type))
133 
134 /*
135  * Symbol table entries.
136  */
137 
138 typedef struct {
139  Elf32_Word st_name; /* String table index of name. */
140  Elf32_Addr st_value; /* Symbol value. */
141  Elf32_Size st_size; /* Size of associated object. */
142  unsigned char st_info; /* Type and binding information. */
143  unsigned char st_other; /* Reserved (not used). */
144  Elf32_Half st_shndx; /* Section index of symbol. */
145 } Elf32_Sym;
146 
147 /* Macros for accessing the fields of st_info. */
148 #define ELF32_ST_BIND(info) ((info) >> 4)
149 #define ELF32_ST_TYPE(info) ((info) & 0xf)
150 
151 /* Macro for constructing st_info from field values. */
152 #define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
153 
154 #endif /* !_SYS_ELF32_H_ */
Elf32_Addr p_paddr
Definition: elf32.h:91
Elf32_Word r_info
Definition: elf32.h:117
Elf32_Size sh_size
Definition: elf32.h:76
ULONG32 Elf32_Size
Definition: elf32.h:41
Elf32_Word sh_flags
Definition: elf32.h:73
Elf32_Off e_shoff
Definition: elf32.h:55
Elf32_Word e_version
Definition: elf32.h:52
Elf32_Word e_flags
Definition: elf32.h:56
Elf32_Addr st_value
Definition: elf32.h:140
unsigned int ULONG32
Definition: basetsd.h:125
ULONG32 Elf32_Word
Definition: elf32.h:40
Elf32_Half e_type
Definition: elf32.h:50
USHORT Elf32_Half
Definition: elf32.h:37
Elf32_Half e_shnum
Definition: elf32.h:61
Elf32_Word sh_link
Definition: elf32.h:77
Elf32_Half e_phentsize
Definition: elf32.h:58
Elf32_Sword r_addend
Definition: elf32.h:124
Elf32_Word sh_info
Definition: elf32.h:78
ULONG32 Elf32_Addr
Definition: elf32.h:36
Elf32_Size p_memsz
Definition: elf32.h:93
Elf32_Size st_size
Definition: elf32.h:141
Elf32_Word r_info
Definition: elf32.h:123
Elf32_Addr sh_addr
Definition: elf32.h:74
Elf32_Half e_shstrndx
Definition: elf32.h:62
Elf32_Size sh_entsize
Definition: elf32.h:80
Elf32_Addr p_vaddr
Definition: elf32.h:90
#define EI_NIDENT
Definition: common.h:64
Elf32_Addr r_offset
Definition: elf32.h:122
unsigned char st_other
Definition: elf32.h:143
Elf32_Off e_phoff
Definition: elf32.h:54
Elf32_Size d_val
Definition: elf32.h:105
Elf32_Addr e_entry
Definition: elf32.h:53
Elf32_Word sh_name
Definition: elf32.h:70
Elf32_Word st_name
Definition: elf32.h:139
Elf32_Half e_shentsize
Definition: elf32.h:60
Elf32_Addr d_ptr
Definition: elf32.h:106
Elf32_Word p_type
Definition: elf32.h:88
Elf32_Off Elf32_Hashelt
Definition: elf32.h:42
Elf32_Half st_shndx
Definition: elf32.h:144
Elf32_Off p_offset
Definition: elf32.h:89
Elf32_Size p_align
Definition: elf32.h:95
Elf32_Half e_phnum
Definition: elf32.h:59
Elf32_Word sh_type
Definition: elf32.h:72
unsigned short USHORT
Definition: pedump.c:61
LONG32 Elf32_Sword
Definition: elf32.h:39
Elf32_Size sh_addralign
Definition: elf32.h:79
Elf32_Size p_filesz
Definition: elf32.h:92
Elf32_Half e_machine
Definition: elf32.h:51
Elf32_Sword d_tag
Definition: elf32.h:103
Elf32_Half e_ehsize
Definition: elf32.h:57
Elf32_Off sh_offset
Definition: elf32.h:75
Elf32_Word p_flags
Definition: elf32.h:94
Elf32_Addr r_offset
Definition: elf32.h:116
unsigned char st_info
Definition: elf32.h:142
ULONG32 Elf32_Off
Definition: elf32.h:38
int LONG32
Definition: basetsd.h:121