source: trunk/kLdr/kLdrModELF32.h@ 3124

Last change on this file since 3124 was 2834, checked in by bird, 19 years ago

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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 __kLdrModELF32_h__
30#define __kLdrModELF32_h__
31
32#include "kLdrModELFCommon.h"
33
34/*
35 * ELF definitions common to all 32-bit architectures.
36 */
37
38typedef uint32_t Elf32_Addr;
39typedef uint16_t Elf32_Half;
40typedef uint32_t Elf32_Off;
41typedef int32_t Elf32_Sword;
42typedef uint32_t Elf32_Word;
43typedef uint32_t Elf32_Size;
44typedef Elf32_Off Elf32_Hashelt;
45
46/*
47 * ELF header.
48 */
49
50typedef struct Elf32_Ehdr {
51 unsigned char e_ident[EI_NIDENT]; /* File identification. */
52 Elf32_Half e_type; /* File type. */
53 Elf32_Half e_machine; /* Machine architecture. */
54 Elf32_Word e_version; /* ELF format version. */
55 Elf32_Addr e_entry; /* Entry point. */
56 Elf32_Off e_phoff; /* Program header file offset. */
57 Elf32_Off e_shoff; /* Section header file offset. */
58 Elf32_Word e_flags; /* Architecture-specific flags. */
59 Elf32_Half e_ehsize; /* Size of ELF header in bytes. */
60 Elf32_Half e_phentsize; /* Size of program header entry. */
61 Elf32_Half e_phnum; /* Number of program header entries. */
62 Elf32_Half e_shentsize; /* Size of section header entry. */
63 Elf32_Half e_shnum; /* Number of section header entries. */
64 Elf32_Half e_shstrndx; /* Section name strings section. */
65} Elf32_Ehdr;
66
67/*
68 * Section header.
69 */
70
71typedef struct {
72 Elf32_Word sh_name; /* Section name (index into the
73 section header string table). */
74 Elf32_Word sh_type; /* Section type. */
75 Elf32_Word sh_flags; /* Section flags. */
76 Elf32_Addr sh_addr; /* Address in memory image. */
77 Elf32_Off sh_offset; /* Offset in file. */
78 Elf32_Size sh_size; /* Size in bytes. */
79 Elf32_Word sh_link; /* Index of a related section. */
80 Elf32_Word sh_info; /* Depends on section type. */
81 Elf32_Size sh_addralign; /* Alignment in bytes. */
82 Elf32_Size sh_entsize; /* Size of each entry in section. */
83} Elf32_Shdr;
84
85/*
86 * Program header.
87 */
88
89typedef struct {
90 Elf32_Word p_type; /* Entry type. */
91 Elf32_Off p_offset; /* File offset of contents. */
92 Elf32_Addr p_vaddr; /* Virtual address in memory image. */
93 Elf32_Addr p_paddr; /* Physical address (not used). */
94 Elf32_Size p_filesz; /* Size of contents in file. */
95 Elf32_Size p_memsz; /* Size of contents in memory. */
96 Elf32_Word p_flags; /* Access permission flags. */
97 Elf32_Size p_align; /* Alignment in memory and file. */
98} Elf32_Phdr;
99
100/*
101 * Dynamic structure. The ".dynamic" section contains an array of them.
102 */
103
104typedef struct {
105 Elf32_Sword d_tag; /* Entry type. */
106 union {
107 Elf32_Size d_val; /* Integer value. */
108 Elf32_Addr d_ptr; /* Address value. */
109 } d_un;
110} Elf32_Dyn;
111
112/*
113 * Relocation entries.
114 */
115
116/* Relocations that don't need an addend field. */
117typedef struct {
118 Elf32_Addr r_offset; /* Location to be relocated. */
119 Elf32_Word r_info; /* Relocation type and symbol index. */
120} Elf32_Rel;
121
122/* Relocations that need an addend field. */
123typedef struct {
124 Elf32_Addr r_offset; /* Location to be relocated. */
125 Elf32_Word r_info; /* Relocation type and symbol index. */
126 Elf32_Sword r_addend; /* Addend. */
127} Elf32_Rela;
128
129/* Macros for accessing the fields of r_info. */
130#define ELF32_R_SYM(info) ((info) >> 8)
131#define ELF32_R_TYPE(info) ((unsigned char)(info))
132
133/* Macro for constructing r_info from field values. */
134#define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type))
135
136/*
137 * Symbol table entries.
138 */
139
140typedef struct {
141 Elf32_Word st_name; /* String table index of name. */
142 Elf32_Addr st_value; /* Symbol value. */
143 Elf32_Size st_size; /* Size of associated object. */
144 unsigned char st_info; /* Type and binding information. */
145 unsigned char st_other; /* Reserved (not used). */
146 Elf32_Half st_shndx; /* Section index of symbol. */
147} Elf32_Sym;
148
149/* Macros for accessing the fields of st_info. */
150#define ELF32_ST_BIND(info) ((info) >> 4)
151#define ELF32_ST_TYPE(info) ((info) & 0xf)
152
153/* Macro for constructing st_info from field values. */
154#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
155
156#endif
157
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