elf64.h revision 330897
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: stable/11/sys/sys/elf64.h 330897 2018-03-14 03:19:51Z eadler $ 29 */ 30 31#ifndef _SYS_ELF64_H_ 32#define _SYS_ELF64_H_ 1 33 34#include <sys/elf_common.h> 35 36/* 37 * ELF definitions common to all 64-bit architectures. 38 */ 39 40typedef uint64_t Elf64_Addr; 41typedef uint16_t Elf64_Half; 42typedef uint64_t Elf64_Off; 43typedef int32_t Elf64_Sword; 44typedef int64_t Elf64_Sxword; 45typedef uint32_t Elf64_Word; 46typedef uint64_t Elf64_Lword; 47typedef uint64_t Elf64_Xword; 48 49/* 50 * Types of dynamic symbol hash table bucket and chain elements. 51 * 52 * This is inconsistent among 64 bit architectures, so a machine dependent 53 * typedef is required. 54 */ 55 56typedef Elf64_Word Elf64_Hashelt; 57 58/* Non-standard class-dependent datatype used for abstraction. */ 59typedef Elf64_Xword Elf64_Size; 60typedef Elf64_Sxword Elf64_Ssize; 61 62/* 63 * ELF header. 64 */ 65 66typedef struct { 67 unsigned char e_ident[EI_NIDENT]; /* File identification. */ 68 Elf64_Half e_type; /* File type. */ 69 Elf64_Half e_machine; /* Machine architecture. */ 70 Elf64_Word e_version; /* ELF format version. */ 71 Elf64_Addr e_entry; /* Entry point. */ 72 Elf64_Off e_phoff; /* Program header file offset. */ 73 Elf64_Off e_shoff; /* Section header file offset. */ 74 Elf64_Word e_flags; /* Architecture-specific flags. */ 75 Elf64_Half e_ehsize; /* Size of ELF header in bytes. */ 76 Elf64_Half e_phentsize; /* Size of program header entry. */ 77 Elf64_Half e_phnum; /* Number of program header entries. */ 78 Elf64_Half e_shentsize; /* Size of section header entry. */ 79 Elf64_Half e_shnum; /* Number of section header entries. */ 80 Elf64_Half e_shstrndx; /* Section name strings section. */ 81} Elf64_Ehdr; 82 83/* 84 * Shared object information, found in SHT_MIPS_LIBLIST. 85 */ 86 87typedef struct { 88 Elf64_Word l_name; /* The name of a shared object. */ 89 Elf64_Word l_time_stamp; /* 64-bit timestamp. */ 90 Elf64_Word l_checksum; /* Checksum of visible symbols, sizes. */ 91 Elf64_Word l_version; /* Interface version string index. */ 92 Elf64_Word l_flags; /* Flags (LL_*). */ 93} Elf64_Lib; 94 95/* 96 * Section header. 97 */ 98 99typedef struct { 100 Elf64_Word sh_name; /* Section name (index into the 101 section header string table). */ 102 Elf64_Word sh_type; /* Section type. */ 103 Elf64_Xword sh_flags; /* Section flags. */ 104 Elf64_Addr sh_addr; /* Address in memory image. */ 105 Elf64_Off sh_offset; /* Offset in file. */ 106 Elf64_Xword sh_size; /* Size in bytes. */ 107 Elf64_Word sh_link; /* Index of a related section. */ 108 Elf64_Word sh_info; /* Depends on section type. */ 109 Elf64_Xword sh_addralign; /* Alignment in bytes. */ 110 Elf64_Xword sh_entsize; /* Size of each entry in section. */ 111} Elf64_Shdr; 112 113/* 114 * Program header. 115 */ 116 117typedef struct { 118 Elf64_Word p_type; /* Entry type. */ 119 Elf64_Word p_flags; /* Access permission flags. */ 120 Elf64_Off p_offset; /* File offset of contents. */ 121 Elf64_Addr p_vaddr; /* Virtual address in memory image. */ 122 Elf64_Addr p_paddr; /* Physical address (not used). */ 123 Elf64_Xword p_filesz; /* Size of contents in file. */ 124 Elf64_Xword p_memsz; /* Size of contents in memory. */ 125 Elf64_Xword p_align; /* Alignment in memory and file. */ 126} Elf64_Phdr; 127 128/* 129 * Dynamic structure. The ".dynamic" section contains an array of them. 130 */ 131 132typedef struct { 133 Elf64_Sxword d_tag; /* Entry type. */ 134 union { 135 Elf64_Xword d_val; /* Integer value. */ 136 Elf64_Addr d_ptr; /* Address value. */ 137 } d_un; 138} Elf64_Dyn; 139 140/* 141 * Relocation entries. 142 */ 143 144/* Relocations that don't need an addend field. */ 145typedef struct { 146 Elf64_Addr r_offset; /* Location to be relocated. */ 147 Elf64_Xword r_info; /* Relocation type and symbol index. */ 148} Elf64_Rel; 149 150/* Relocations that need an addend field. */ 151typedef struct { 152 Elf64_Addr r_offset; /* Location to be relocated. */ 153 Elf64_Xword r_info; /* Relocation type and symbol index. */ 154 Elf64_Sxword r_addend; /* Addend. */ 155} Elf64_Rela; 156 157/* Macros for accessing the fields of r_info. */ 158#define ELF64_R_SYM(info) ((info) >> 32) 159#define ELF64_R_TYPE(info) ((info) & 0xffffffffL) 160 161/* Macro for constructing r_info from field values. */ 162#define ELF64_R_INFO(sym, type) (((sym) << 32) + ((type) & 0xffffffffL)) 163 164#define ELF64_R_TYPE_DATA(info) (((Elf64_Xword)(info)<<32)>>40) 165#define ELF64_R_TYPE_ID(info) (((Elf64_Xword)(info)<<56)>>56) 166#define ELF64_R_TYPE_INFO(data, type) \ 167 (((Elf64_Xword)(data)<<8)+(Elf64_Xword)(type)) 168 169/* 170 * Note entry header 171 */ 172typedef Elf_Note Elf64_Nhdr; 173 174/* 175 * Move entry 176 */ 177typedef struct { 178 Elf64_Lword m_value; /* symbol value */ 179 Elf64_Xword m_info; /* size + index */ 180 Elf64_Xword m_poffset; /* symbol offset */ 181 Elf64_Half m_repeat; /* repeat count */ 182 Elf64_Half m_stride; /* stride info */ 183} Elf64_Move; 184 185#define ELF64_M_SYM(info) ((info)>>8) 186#define ELF64_M_SIZE(info) ((unsigned char)(info)) 187#define ELF64_M_INFO(sym, size) (((sym)<<8)+(unsigned char)(size)) 188 189/* 190 * Hardware/Software capabilities entry 191 */ 192typedef struct { 193 Elf64_Xword c_tag; /* how to interpret value */ 194 union { 195 Elf64_Xword c_val; 196 Elf64_Addr c_ptr; 197 } c_un; 198} Elf64_Cap; 199 200/* 201 * Symbol table entries. 202 */ 203 204typedef struct { 205 Elf64_Word st_name; /* String table index of name. */ 206 unsigned char st_info; /* Type and binding information. */ 207 unsigned char st_other; /* Reserved (not used). */ 208 Elf64_Half st_shndx; /* Section index of symbol. */ 209 Elf64_Addr st_value; /* Symbol value. */ 210 Elf64_Xword st_size; /* Size of associated object. */ 211} Elf64_Sym; 212 213/* Macros for accessing the fields of st_info. */ 214#define ELF64_ST_BIND(info) ((info) >> 4) 215#define ELF64_ST_TYPE(info) ((info) & 0xf) 216 217/* Macro for constructing st_info from field values. */ 218#define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) 219 220/* Macro for accessing the fields of st_other. */ 221#define ELF64_ST_VISIBILITY(oth) ((oth) & 0x3) 222 223/* Structures used by Sun & GNU-style symbol versioning. */ 224typedef struct { 225 Elf64_Half vd_version; 226 Elf64_Half vd_flags; 227 Elf64_Half vd_ndx; 228 Elf64_Half vd_cnt; 229 Elf64_Word vd_hash; 230 Elf64_Word vd_aux; 231 Elf64_Word vd_next; 232} Elf64_Verdef; 233 234typedef struct { 235 Elf64_Word vda_name; 236 Elf64_Word vda_next; 237} Elf64_Verdaux; 238 239typedef struct { 240 Elf64_Half vn_version; 241 Elf64_Half vn_cnt; 242 Elf64_Word vn_file; 243 Elf64_Word vn_aux; 244 Elf64_Word vn_next; 245} Elf64_Verneed; 246 247typedef struct { 248 Elf64_Word vna_hash; 249 Elf64_Half vna_flags; 250 Elf64_Half vna_other; 251 Elf64_Word vna_name; 252 Elf64_Word vna_next; 253} Elf64_Vernaux; 254 255typedef Elf64_Half Elf64_Versym; 256 257typedef struct { 258 Elf64_Half si_boundto; /* direct bindings - symbol bound to */ 259 Elf64_Half si_flags; /* per symbol flags */ 260} Elf64_Syminfo; 261 262typedef struct { 263 Elf64_Word ch_type; 264 Elf64_Word ch_reserved; 265 Elf64_Xword ch_size; 266 Elf64_Xword ch_addralign; 267} Elf64_Chdr; 268 269#endif /* !_SYS_ELF64_H_ */ 270