elf32.h revision 153515
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: head/sys/sys/elf32.h 153515 2005-12-18 19:43:33Z kan $ 27 */ 28 29#ifndef _SYS_ELF32_H_ 30#define _SYS_ELF32_H_ 1 31 32#include <sys/elf_common.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; 43 44typedef Elf32_Word Elf32_Hashelt; 45 46/* Non-standard class-dependent datatype used for abstraction. */ 47typedef Elf32_Word Elf32_Size; 48typedef Elf32_Sword Elf32_Ssize; 49 50/* 51 * ELF header. 52 */ 53 54typedef struct { 55 unsigned char e_ident[EI_NIDENT]; /* File identification. */ 56 Elf32_Half e_type; /* File type. */ 57 Elf32_Half e_machine; /* Machine architecture. */ 58 Elf32_Word e_version; /* ELF format version. */ 59 Elf32_Addr e_entry; /* Entry point. */ 60 Elf32_Off e_phoff; /* Program header file offset. */ 61 Elf32_Off e_shoff; /* Section header file offset. */ 62 Elf32_Word e_flags; /* Architecture-specific flags. */ 63 Elf32_Half e_ehsize; /* Size of ELF header in bytes. */ 64 Elf32_Half e_phentsize; /* Size of program header entry. */ 65 Elf32_Half e_phnum; /* Number of program header entries. */ 66 Elf32_Half e_shentsize; /* Size of section header entry. */ 67 Elf32_Half e_shnum; /* Number of section header entries. */ 68 Elf32_Half e_shstrndx; /* Section name strings section. */ 69} Elf32_Ehdr; 70 71/* 72 * Section header. 73 */ 74 75typedef struct { 76 Elf32_Word sh_name; /* Section name (index into the 77 section header string table). */ 78 Elf32_Word sh_type; /* Section type. */ 79 Elf32_Word sh_flags; /* Section flags. */ 80 Elf32_Addr sh_addr; /* Address in memory image. */ 81 Elf32_Off sh_offset; /* Offset in file. */ 82 Elf32_Word sh_size; /* Size in bytes. */ 83 Elf32_Word sh_link; /* Index of a related section. */ 84 Elf32_Word sh_info; /* Depends on section type. */ 85 Elf32_Word sh_addralign; /* Alignment in bytes. */ 86 Elf32_Word sh_entsize; /* Size of each entry in section. */ 87} Elf32_Shdr; 88 89/* 90 * Program header. 91 */ 92 93typedef struct { 94 Elf32_Word p_type; /* Entry type. */ 95 Elf32_Off p_offset; /* File offset of contents. */ 96 Elf32_Addr p_vaddr; /* Virtual address in memory image. */ 97 Elf32_Addr p_paddr; /* Physical address (not used). */ 98 Elf32_Word p_filesz; /* Size of contents in file. */ 99 Elf32_Word p_memsz; /* Size of contents in memory. */ 100 Elf32_Word p_flags; /* Access permission flags. */ 101 Elf32_Word p_align; /* Alignment in memory and file. */ 102} Elf32_Phdr; 103 104/* 105 * Dynamic structure. The ".dynamic" section contains an array of them. 106 */ 107 108typedef struct { 109 Elf32_Sword d_tag; /* Entry type. */ 110 union { 111 Elf32_Word d_val; /* Integer value. */ 112 Elf32_Addr d_ptr; /* Address value. */ 113 } d_un; 114} Elf32_Dyn; 115 116/* 117 * Relocation entries. 118 */ 119 120/* Relocations that don't need an addend field. */ 121typedef struct { 122 Elf32_Addr r_offset; /* Location to be relocated. */ 123 Elf32_Word r_info; /* Relocation type and symbol index. */ 124} Elf32_Rel; 125 126/* Relocations that need an addend field. */ 127typedef struct { 128 Elf32_Addr r_offset; /* Location to be relocated. */ 129 Elf32_Word r_info; /* Relocation type and symbol index. */ 130 Elf32_Sword r_addend; /* Addend. */ 131} Elf32_Rela; 132 133/* Macros for accessing the fields of r_info. */ 134#define ELF32_R_SYM(info) ((info) >> 8) 135#define ELF32_R_TYPE(info) ((unsigned char)(info)) 136 137/* Macro for constructing r_info from field values. */ 138#define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type)) 139 140/* 141 * Symbol table entries. 142 */ 143 144typedef struct { 145 Elf32_Word st_name; /* String table index of name. */ 146 Elf32_Addr st_value; /* Symbol value. */ 147 Elf32_Word st_size; /* Size of associated object. */ 148 unsigned char st_info; /* Type and binding information. */ 149 unsigned char st_other; /* Reserved (not used). */ 150 Elf32_Half st_shndx; /* Section index of symbol. */ 151} Elf32_Sym; 152 153/* Macros for accessing the fields of st_info. */ 154#define ELF32_ST_BIND(info) ((info) >> 4) 155#define ELF32_ST_TYPE(info) ((info) & 0xf) 156 157/* Macro for constructing st_info from field values. */ 158#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) 159 160/* Macro for accessing the fields of st_other. */ 161#define ELF32_ST_VISIBILITY(oth) ((oth) & 0x3) 162 163/* Structures used by Sun & GNU symbol versioning. */ 164typedef struct 165{ 166 Elf32_Half vd_version; 167 Elf32_Half vd_flags; 168 Elf32_Half vd_ndx; 169 Elf32_Half vd_cnt; 170 Elf32_Word vd_hash; 171 Elf32_Word vd_aux; 172 Elf32_Word vd_next; 173} Elf32_Verdef; 174 175typedef struct 176{ 177 Elf32_Word vda_name; 178 Elf32_Word vda_next; 179} Elf32_Verdaux; 180 181typedef struct 182{ 183 Elf32_Half vn_version; 184 Elf32_Half vn_cnt; 185 Elf32_Word vn_file; 186 Elf32_Word vn_aux; 187 Elf32_Word vn_next; 188} Elf32_Verneed; 189 190typedef struct 191{ 192 Elf32_Word vna_hash; 193 Elf32_Half vna_flags; 194 Elf32_Half vna_other; 195 Elf32_Word vna_name; 196 Elf32_Word vna_next; 197} Elf32_Vernaux; 198 199typedef Elf32_Half Elf32_Versym; 200 201#endif /* !_SYS_ELF32_H_ */ 202