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 1.7 1999/08/28 00:51:41 peter Exp $ 27 */ 28 29 #ifndef _SYS_ELF32_H_ 30 #define _SYS_ELF32_H_ 31 32 #ifndef _SYS_TYPES_H_ 33 #include <sys/types.h> 34 #endif 35 #ifndef _SYS_ELF_COMMON_H_ 36 #include <sys/elf_common.h> 37 #endif 38 39 /* 40 * ELF definitions common to all 32-bit architectures. 41 */ 42 43 typedef uint32_t Elf32_Addr; 44 typedef uint16_t Elf32_Half; 45 typedef uint32_t Elf32_Off; 46 typedef int32_t Elf32_Sword; 47 typedef uint32_t Elf32_Word; 48 typedef uint32_t Elf32_Size; 49 typedef Elf32_Off Elf32_Hashelt; 50 51 /* 52 * ELF header. 53 */ 54 55 typedef struct { 56 unsigned char e_ident[EI_NIDENT]; /* File identification. */ 57 Elf32_Half e_type; /* File type. */ 58 Elf32_Half e_machine; /* Machine architecture. */ 59 Elf32_Word e_version; /* ELF format version. */ 60 Elf32_Addr e_entry; /* Entry point. */ 61 Elf32_Off e_phoff; /* Program header file offset. */ 62 Elf32_Off e_shoff; /* Section header file offset. */ 63 Elf32_Word e_flags; /* Architecture-specific flags. */ 64 Elf32_Half e_ehsize; /* Size of ELF header in bytes. */ 65 Elf32_Half e_phentsize; /* Size of program header entry. */ 66 Elf32_Half e_phnum; /* Number of program header entries. */ 67 Elf32_Half e_shentsize; /* Size of section header entry. */ 68 Elf32_Half e_shnum; /* Number of section header entries. */ 69 Elf32_Half e_shstrndx; /* Section name strings section. */ 70 } Elf32_Ehdr; 71 72 /* 73 * Section header. 74 */ 75 76 typedef struct { 77 Elf32_Word sh_name; /* Section name (index into the 78 section header string table). */ 79 Elf32_Word sh_type; /* Section type. */ 80 Elf32_Word sh_flags; /* Section flags. */ 81 Elf32_Addr sh_addr; /* Address in memory image. */ 82 Elf32_Off sh_offset; /* Offset in file. */ 83 Elf32_Size sh_size; /* Size in bytes. */ 84 Elf32_Word sh_link; /* Index of a related section. */ 85 Elf32_Word sh_info; /* Depends on section type. */ 86 Elf32_Size sh_addralign; /* Alignment in bytes. */ 87 Elf32_Size sh_entsize; /* Size of each entry in section. */ 88 } Elf32_Shdr; 89 90 /* 91 * Program header. 92 */ 93 94 typedef struct { 95 Elf32_Word p_type; /* Entry type. */ 96 Elf32_Off p_offset; /* File offset of contents. */ 97 Elf32_Addr p_vaddr; /* Virtual address in memory image. */ 98 Elf32_Addr p_paddr; /* Physical address (not used). */ 99 Elf32_Size p_filesz; /* Size of contents in file. */ 100 Elf32_Size p_memsz; /* Size of contents in memory. */ 101 Elf32_Word p_flags; /* Access permission flags. */ 102 Elf32_Size p_align; /* Alignment in memory and file. */ 103 } Elf32_Phdr; 104 105 /* 106 * Dynamic structure. The ".dynamic" section contains an array of them. 107 */ 108 109 typedef struct { 110 Elf32_Sword d_tag; /* Entry type. */ 111 union { 112 Elf32_Size d_val; /* Integer value. */ 113 Elf32_Addr d_ptr; /* Address value. */ 114 } d_un; 115 } Elf32_Dyn; 116 117 /* 118 * Relocation entries. 119 */ 120 121 /* Relocations that don't need an addend field. */ 122 typedef struct { 123 Elf32_Addr r_offset; /* Location to be relocated. */ 124 Elf32_Word r_info; /* Relocation type and symbol index. */ 125 } Elf32_Rel; 126 127 /* Relocations that need an addend field. */ 128 typedef struct { 129 Elf32_Addr r_offset; /* Location to be relocated. */ 130 Elf32_Word r_info; /* Relocation type and symbol index. */ 131 Elf32_Sword r_addend; /* Addend. */ 132 } Elf32_Rela; 133 134 /* Macros for accessing the fields of r_info. */ 135 #define ELF32_R_SYM(info) ((info) >> 8) 136 #define ELF32_R_TYPE(info) ((unsigned char)(info)) 137 138 /* Macro for constructing r_info from field values. */ 139 #define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type)) 140 141 /* 142 * Symbol table entries. 143 */ 144 145 typedef struct { 146 Elf32_Word st_name; /* String table index of name. */ 147 Elf32_Addr st_value; /* Symbol value. */ 148 Elf32_Size st_size; /* Size of associated object. */ 149 unsigned char st_info; /* Type and binding information. */ 150 unsigned char st_other; /* Reserved (not used). */ 151 Elf32_Half st_shndx; /* Section index of symbol. */ 152 } Elf32_Sym; 153 154 /* Macros for accessing the fields of st_info. */ 155 #define ELF32_ST_BIND(info) ((info) >> 4) 156 #define ELF32_ST_TYPE(info) ((info) & 0xf) 157 158 /* Macro for constructing st_info from field values. */ 159 #define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) 160 161 /* Macro for accessing the fields of st_other. */ 162 #define ELF32_ST_VISIBILITY(oth) ((oth) & 0x3) 163 164 /* Structures used by Sun & GNU symbol versioning. */ 165 typedef struct 166 { 167 Elf32_Half vd_version; 168 Elf32_Half vd_flags; 169 Elf32_Half vd_ndx; 170 Elf32_Half vd_cnt; 171 Elf32_Word vd_hash; 172 Elf32_Word vd_aux; 173 Elf32_Word vd_next; 174 } Elf32_Verdef; 175 176 typedef struct 177 { 178 Elf32_Word vda_name; 179 Elf32_Word vda_next; 180 } Elf32_Verdaux; 181 182 typedef struct 183 { 184 Elf32_Half vn_version; 185 Elf32_Half vn_cnt; 186 Elf32_Word vn_file; 187 Elf32_Word vn_aux; 188 Elf32_Word vn_next; 189 } Elf32_Verneed; 190 191 typedef struct 192 { 193 Elf32_Word vna_hash; 194 Elf32_Half vna_flags; 195 Elf32_Half vna_other; 196 Elf32_Word vna_name; 197 Elf32_Word vna_next; 198 } Elf32_Vernaux; 199 200 typedef Elf32_Half Elf32_Versym; 201 202 typedef struct { 203 Elf32_Half si_boundto; /* direct bindings - symbol bound to */ 204 Elf32_Half si_flags; /* per symbol flags */ 205 } Elf32_Syminfo; 206 207 #endif /* !_SYS_ELF32_H_ */ 208