1 /** @file 2 Ported ELF include files from FreeBSD 3 4 Copyright (c) 2009 - 2010, Apple Inc. All rights reserved.<BR> 5 SPDX-License-Identifier: BSD-2-Clause-Patent 6 7 8 **/ 9 /*- 10 * Copyright (c) 1996-1998 John D. Polstra. 11 * All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD: src/sys/sys/elf32.h,v 1.8.14.2 2007/12/03 21:30:36 marius Exp $ 35 */ 36 37 #ifndef _SYS_ELF32_H_ 38 #define _SYS_ELF32_H_ 1 39 40 41 /* 42 * ELF definitions common to all 32-bit architectures. 43 */ 44 45 typedef UINT32 Elf32_Addr; 46 typedef UINT16 Elf32_Half; 47 typedef UINT32 Elf32_Off; 48 typedef INT32 Elf32_Sword; 49 typedef UINT32 Elf32_Word; 50 typedef UINT64 Elf32_Lword; 51 52 typedef Elf32_Word Elf32_Hashelt; 53 54 /* Non-standard class-dependent datatype used for abstraction. */ 55 typedef Elf32_Word Elf32_Size; 56 typedef Elf32_Sword Elf32_Ssize; 57 58 /* 59 * ELF header. 60 */ 61 62 typedef struct { 63 unsigned char e_ident[EI_NIDENT]; /* File identification. */ 64 Elf32_Half e_type; /* File type. */ 65 Elf32_Half e_machine; /* Machine architecture. */ 66 Elf32_Word e_version; /* ELF format version. */ 67 Elf32_Addr e_entry; /* Entry point. */ 68 Elf32_Off e_phoff; /* Program header file offset. */ 69 Elf32_Off e_shoff; /* Section header file offset. */ 70 Elf32_Word e_flags; /* Architecture-specific flags. */ 71 Elf32_Half e_ehsize; /* Size of ELF header in bytes. */ 72 Elf32_Half e_phentsize; /* Size of program header entry. */ 73 Elf32_Half e_phnum; /* Number of program header entries. */ 74 Elf32_Half e_shentsize; /* Size of section header entry. */ 75 Elf32_Half e_shnum; /* Number of section header entries. */ 76 Elf32_Half e_shstrndx; /* Section name strings section. */ 77 } Elf32_Ehdr; 78 79 /* 80 * Section header. 81 */ 82 83 typedef struct { 84 Elf32_Word sh_name; /* Section name (index into the 85 section header string table). */ 86 Elf32_Word sh_type; /* Section type. */ 87 Elf32_Word sh_flags; /* Section flags. */ 88 Elf32_Addr sh_addr; /* Address in memory image. */ 89 Elf32_Off sh_offset; /* Offset in file. */ 90 Elf32_Word sh_size; /* Size in bytes. */ 91 Elf32_Word sh_link; /* Index of a related section. */ 92 Elf32_Word sh_info; /* Depends on section type. */ 93 Elf32_Word sh_addralign; /* Alignment in bytes. */ 94 Elf32_Word sh_entsize; /* Size of each entry in section. */ 95 } Elf32_Shdr; 96 97 /* 98 * Program header. 99 */ 100 101 typedef struct { 102 Elf32_Word p_type; /* Entry type. */ 103 Elf32_Off p_offset; /* File offset of contents. */ 104 Elf32_Addr p_vaddr; /* Virtual address in memory image. */ 105 Elf32_Addr p_paddr; /* Physical address (not used). */ 106 Elf32_Word p_filesz; /* Size of contents in file. */ 107 Elf32_Word p_memsz; /* Size of contents in memory. */ 108 Elf32_Word p_flags; /* Access permission flags. */ 109 Elf32_Word p_align; /* Alignment in memory and file. */ 110 } Elf32_Phdr; 111 112 /* 113 * Dynamic structure. The ".dynamic" section contains an array of them. 114 */ 115 116 typedef struct { 117 Elf32_Sword d_tag; /* Entry type. */ 118 union { 119 Elf32_Word d_val; /* Integer value. */ 120 Elf32_Addr d_ptr; /* Address value. */ 121 } d_un; 122 } Elf32_Dyn; 123 124 /* 125 * Relocation entries. 126 */ 127 128 /* Relocations that don't need an addend field. */ 129 typedef struct { 130 Elf32_Addr r_offset; /* Location to be relocated. */ 131 Elf32_Word r_info; /* Relocation type and symbol index. */ 132 } Elf32_Rel; 133 134 /* Relocations that need an addend field. */ 135 typedef struct { 136 Elf32_Addr r_offset; /* Location to be relocated. */ 137 Elf32_Word r_info; /* Relocation type and symbol index. */ 138 Elf32_Sword r_addend; /* Addend. */ 139 } Elf32_Rela; 140 141 /* Macros for accessing the fields of r_info. */ 142 #define ELF32_R_SYM(info) ((info) >> 8) 143 #define ELF32_R_TYPE(info) ((unsigned char)(info)) 144 145 /* Macro for constructing r_info from field values. */ 146 #define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type)) 147 148 /* 149 * Note entry header 150 */ 151 typedef Elf_Note Elf32_Nhdr; 152 153 /* 154 * Move entry 155 */ 156 typedef struct { 157 Elf32_Lword m_value; /* symbol value */ 158 Elf32_Word m_info; /* size + index */ 159 Elf32_Word m_poffset; /* symbol offset */ 160 Elf32_Half m_repeat; /* repeat count */ 161 Elf32_Half m_stride; /* stride info */ 162 } Elf32_Move; 163 164 /* 165 * The macros compose and decompose values for Move.r_info 166 * 167 * sym = ELF32_M_SYM(M.m_info) 168 * size = ELF32_M_SIZE(M.m_info) 169 * M.m_info = ELF32_M_INFO(sym, size) 170 */ 171 #define ELF32_M_SYM(info) ((info)>>8) 172 #define ELF32_M_SIZE(info) ((unsigned char)(info)) 173 #define ELF32_M_INFO(sym, size) (((sym)<<8)+(unsigned char)(size)) 174 175 /* 176 * Hardware/Software capabilities entry 177 */ 178 typedef struct { 179 Elf32_Word c_tag; /* how to interpret value */ 180 union { 181 Elf32_Word c_val; 182 Elf32_Addr c_ptr; 183 } c_un; 184 } Elf32_Cap; 185 186 /* 187 * Symbol table entries. 188 */ 189 190 typedef struct { 191 Elf32_Word st_name; /* String table index of name. */ 192 Elf32_Addr st_value; /* Symbol value. */ 193 Elf32_Word st_size; /* Size of associated object. */ 194 unsigned char st_info; /* Type and binding information. */ 195 unsigned char st_other; /* Reserved (not used). */ 196 Elf32_Half st_shndx; /* Section index of symbol. */ 197 } Elf32_Sym; 198 199 /* Macros for accessing the fields of st_info. */ 200 #define ELF32_ST_BIND(info) ((info) >> 4) 201 #define ELF32_ST_TYPE(info) ((info) & 0xf) 202 203 /* Macro for constructing st_info from field values. */ 204 #define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) 205 206 /* Macro for accessing the fields of st_other. */ 207 #define ELF32_ST_VISIBILITY(oth) ((oth) & 0x3) 208 209 /* Structures used by Sun & GNU symbol versioning. */ 210 typedef struct 211 { 212 Elf32_Half vd_version; 213 Elf32_Half vd_flags; 214 Elf32_Half vd_ndx; 215 Elf32_Half vd_cnt; 216 Elf32_Word vd_hash; 217 Elf32_Word vd_aux; 218 Elf32_Word vd_next; 219 } Elf32_Verdef; 220 221 typedef struct 222 { 223 Elf32_Word vda_name; 224 Elf32_Word vda_next; 225 } Elf32_Verdaux; 226 227 typedef struct 228 { 229 Elf32_Half vn_version; 230 Elf32_Half vn_cnt; 231 Elf32_Word vn_file; 232 Elf32_Word vn_aux; 233 Elf32_Word vn_next; 234 } Elf32_Verneed; 235 236 typedef struct 237 { 238 Elf32_Word vna_hash; 239 Elf32_Half vna_flags; 240 Elf32_Half vna_other; 241 Elf32_Word vna_name; 242 Elf32_Word vna_next; 243 } Elf32_Vernaux; 244 245 typedef Elf32_Half Elf32_Versym; 246 247 typedef struct { 248 Elf32_Half si_boundto; /* direct bindings - symbol bound to */ 249 Elf32_Half si_flags; /* per symbol flags */ 250 } Elf32_Syminfo; 251 252 #endif /* !_SYS_ELF32_H_ */ 253