1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1996-1998 John D. Polstra. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _SYS_ELF32_H_ 32 #define _SYS_ELF32_H_ 1 33 34 #include <sys/elf_common.h> 35 36 /* 37 * ELF definitions common to all 32-bit architectures. 38 */ 39 40 typedef uint32_t Elf32_Addr; 41 typedef uint16_t Elf32_Half; 42 typedef uint32_t Elf32_Off; 43 typedef int32_t Elf32_Sword; 44 typedef uint32_t Elf32_Word; 45 typedef uint64_t Elf32_Lword; 46 47 typedef Elf32_Word Elf32_Hashelt; 48 49 /* Non-standard class-dependent datatype used for abstraction. */ 50 typedef Elf32_Word Elf32_Size; 51 typedef Elf32_Sword Elf32_Ssize; 52 53 /* 54 * ELF header. 55 */ 56 57 typedef struct { 58 unsigned char e_ident[EI_NIDENT]; /* File identification. */ 59 Elf32_Half e_type; /* File type. */ 60 Elf32_Half e_machine; /* Machine architecture. */ 61 Elf32_Word e_version; /* ELF format version. */ 62 Elf32_Addr e_entry; /* Entry point. */ 63 Elf32_Off e_phoff; /* Program header file offset. */ 64 Elf32_Off e_shoff; /* Section header file offset. */ 65 Elf32_Word e_flags; /* Architecture-specific flags. */ 66 Elf32_Half e_ehsize; /* Size of ELF header in bytes. */ 67 Elf32_Half e_phentsize; /* Size of program header entry. */ 68 Elf32_Half e_phnum; /* Number of program header entries. */ 69 Elf32_Half e_shentsize; /* Size of section header entry. */ 70 Elf32_Half e_shnum; /* Number of section header entries. */ 71 Elf32_Half e_shstrndx; /* Section name strings section. */ 72 } Elf32_Ehdr; 73 74 /* 75 * Shared object information, found in SHT_MIPS_LIBLIST. 76 */ 77 78 typedef struct { 79 Elf32_Word l_name; /* The name of a shared object. */ 80 Elf32_Word l_time_stamp; /* 32-bit timestamp. */ 81 Elf32_Word l_checksum; /* Checksum of visible symbols, sizes. */ 82 Elf32_Word l_version; /* Interface version string index. */ 83 Elf32_Word l_flags; /* Flags (LL_*). */ 84 } Elf32_Lib; 85 86 /* 87 * Section header. 88 */ 89 90 typedef struct { 91 Elf32_Word sh_name; /* Section name (index into the 92 section header string table). */ 93 Elf32_Word sh_type; /* Section type. */ 94 Elf32_Word sh_flags; /* Section flags. */ 95 Elf32_Addr sh_addr; /* Address in memory image. */ 96 Elf32_Off sh_offset; /* Offset in file. */ 97 Elf32_Word sh_size; /* Size in bytes. */ 98 Elf32_Word sh_link; /* Index of a related section. */ 99 Elf32_Word sh_info; /* Depends on section type. */ 100 Elf32_Word sh_addralign; /* Alignment in bytes. */ 101 Elf32_Word sh_entsize; /* Size of each entry in section. */ 102 } Elf32_Shdr; 103 104 /* 105 * Program header. 106 */ 107 108 typedef struct { 109 Elf32_Word p_type; /* Entry type. */ 110 Elf32_Off p_offset; /* File offset of contents. */ 111 Elf32_Addr p_vaddr; /* Virtual address in memory image. */ 112 Elf32_Addr p_paddr; /* Physical address (not used). */ 113 Elf32_Word p_filesz; /* Size of contents in file. */ 114 Elf32_Word p_memsz; /* Size of contents in memory. */ 115 Elf32_Word p_flags; /* Access permission flags. */ 116 Elf32_Word p_align; /* Alignment in memory and file. */ 117 } Elf32_Phdr; 118 119 /* 120 * Dynamic structure. The ".dynamic" section contains an array of them. 121 */ 122 123 typedef struct { 124 Elf32_Sword d_tag; /* Entry type. */ 125 union { 126 Elf32_Word d_val; /* Integer value. */ 127 Elf32_Addr d_ptr; /* Address value. */ 128 } d_un; 129 } Elf32_Dyn; 130 131 /* 132 * Relocation entries. 133 */ 134 135 /* Relocations that don't need an addend field. */ 136 typedef struct { 137 Elf32_Addr r_offset; /* Location to be relocated. */ 138 Elf32_Word r_info; /* Relocation type and symbol index. */ 139 } Elf32_Rel; 140 141 /* Relocations that need an addend field. */ 142 typedef struct { 143 Elf32_Addr r_offset; /* Location to be relocated. */ 144 Elf32_Word r_info; /* Relocation type and symbol index. */ 145 Elf32_Sword r_addend; /* Addend. */ 146 } Elf32_Rela; 147 148 /* Macros for accessing the fields of r_info. */ 149 #define ELF32_R_SYM(info) ((info) >> 8) 150 #define ELF32_R_TYPE(info) ((unsigned char)(info)) 151 152 /* Macro for constructing r_info from field values. */ 153 #define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type)) 154 155 /* 156 * Note entry header 157 */ 158 typedef Elf_Note Elf32_Nhdr; 159 160 /* 161 * Move entry 162 */ 163 typedef struct { 164 Elf32_Lword m_value; /* symbol value */ 165 Elf32_Word m_info; /* size + index */ 166 Elf32_Word m_poffset; /* symbol offset */ 167 Elf32_Half m_repeat; /* repeat count */ 168 Elf32_Half m_stride; /* stride info */ 169 } Elf32_Move; 170 171 /* 172 * The macros compose and decompose values for Move.r_info 173 * 174 * sym = ELF32_M_SYM(M.m_info) 175 * size = ELF32_M_SIZE(M.m_info) 176 * M.m_info = ELF32_M_INFO(sym, size) 177 */ 178 #define ELF32_M_SYM(info) ((info)>>8) 179 #define ELF32_M_SIZE(info) ((unsigned char)(info)) 180 #define ELF32_M_INFO(sym, size) (((sym)<<8)+(unsigned char)(size)) 181 182 /* 183 * Hardware/Software capabilities entry 184 */ 185 typedef struct { 186 Elf32_Word c_tag; /* how to interpret value */ 187 union { 188 Elf32_Word c_val; 189 Elf32_Addr c_ptr; 190 } c_un; 191 } Elf32_Cap; 192 193 /* 194 * Symbol table entries. 195 */ 196 197 typedef struct { 198 Elf32_Word st_name; /* String table index of name. */ 199 Elf32_Addr st_value; /* Symbol value. */ 200 Elf32_Word st_size; /* Size of associated object. */ 201 unsigned char st_info; /* Type and binding information. */ 202 unsigned char st_other; /* Reserved (not used). */ 203 Elf32_Half st_shndx; /* Section index of symbol. */ 204 } Elf32_Sym; 205 206 /* Macros for accessing the fields of st_info. */ 207 #define ELF32_ST_BIND(info) ((info) >> 4) 208 #define ELF32_ST_TYPE(info) ((info) & 0xf) 209 210 /* Macro for constructing st_info from field values. */ 211 #define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) 212 213 /* Macro for accessing the fields of st_other. */ 214 #define ELF32_ST_VISIBILITY(oth) ((oth) & 0x3) 215 216 /* Structures used by Sun & GNU symbol versioning. */ 217 typedef struct 218 { 219 Elf32_Half vd_version; 220 Elf32_Half vd_flags; 221 Elf32_Half vd_ndx; 222 Elf32_Half vd_cnt; 223 Elf32_Word vd_hash; 224 Elf32_Word vd_aux; 225 Elf32_Word vd_next; 226 } Elf32_Verdef; 227 228 typedef struct 229 { 230 Elf32_Word vda_name; 231 Elf32_Word vda_next; 232 } Elf32_Verdaux; 233 234 typedef struct 235 { 236 Elf32_Half vn_version; 237 Elf32_Half vn_cnt; 238 Elf32_Word vn_file; 239 Elf32_Word vn_aux; 240 Elf32_Word vn_next; 241 } Elf32_Verneed; 242 243 typedef struct 244 { 245 Elf32_Word vna_hash; 246 Elf32_Half vna_flags; 247 Elf32_Half vna_other; 248 Elf32_Word vna_name; 249 Elf32_Word vna_next; 250 } Elf32_Vernaux; 251 252 typedef Elf32_Half Elf32_Versym; 253 254 typedef struct { 255 Elf32_Half si_boundto; /* direct bindings - symbol bound to */ 256 Elf32_Half si_flags; /* per symbol flags */ 257 } Elf32_Syminfo; 258 259 typedef struct { 260 Elf32_Word ch_type; 261 Elf32_Word ch_size; 262 Elf32_Word ch_addralign; 263 } Elf32_Chdr; 264 265 #endif /* !_SYS_ELF32_H_ */ 266