1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1996-1997 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 _MACHINE_ELF_H_ 32 #define _MACHINE_ELF_H_ 1 33 34 #if defined(__i386__) || defined(_MACHINE_ELF_WANT_32BIT) 35 36 /* 37 * ELF definitions for the i386 architecture. 38 */ 39 40 #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 41 #if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64 42 #include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */ 43 #endif 44 45 #ifndef __ELF_WORD_SIZE 46 #define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */ 47 #endif 48 49 #include <sys/elf_generic.h> 50 51 #define ELF_ARCH EM_386 52 53 #define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486) 54 55 /* 56 * Auxiliary vector entries for passing information to the interpreter. 57 * 58 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 59 * but POSIX lays claim to all symbols ending with "_t". 60 */ 61 62 typedef struct { /* Auxiliary vector entry on initial stack */ 63 int a_type; /* Entry type. */ 64 union { 65 long a_val; /* Integer value. */ 66 void *a_ptr; /* Address. */ 67 void (*a_fcn)(void); /* Function pointer (not used). */ 68 } a_un; 69 } Elf32_Auxinfo; 70 71 #if __ELF_WORD_SIZE == 64 72 /* Fake for amd64 loader support */ 73 typedef struct { 74 int fake; 75 } Elf64_Auxinfo; 76 #endif 77 78 __ElfType(Auxinfo); 79 80 /* Values for a_type. */ 81 #define AT_NULL 0 /* Terminates the vector. */ 82 #define AT_IGNORE 1 /* Ignored entry. */ 83 #define AT_EXECFD 2 /* File descriptor of program to load. */ 84 #define AT_PHDR 3 /* Program header of program already loaded. */ 85 #define AT_PHENT 4 /* Size of each program header entry. */ 86 #define AT_PHNUM 5 /* Number of program header entries. */ 87 #define AT_PAGESZ 6 /* Page size in bytes. */ 88 #define AT_BASE 7 /* Interpreter's base address. */ 89 #define AT_FLAGS 8 /* Flags (unused for i386). */ 90 #define AT_ENTRY 9 /* Where interpreter should transfer control. */ 91 #define AT_NOTELF 10 /* Program is not ELF ?? */ 92 #define AT_UID 11 /* Real uid. */ 93 #define AT_EUID 12 /* Effective uid. */ 94 #define AT_GID 13 /* Real gid. */ 95 #define AT_EGID 14 /* Effective gid. */ 96 #define AT_EXECPATH 15 /* Path to the executable. */ 97 #define AT_CANARY 16 /* Canary for SSP. */ 98 #define AT_CANARYLEN 17 /* Length of the canary. */ 99 #define AT_OSRELDATE 18 /* OSRELDATE. */ 100 #define AT_NCPUS 19 /* Number of CPUs. */ 101 #define AT_PAGESIZES 20 /* Pagesizes. */ 102 #define AT_PAGESIZESLEN 21 /* Number of pagesizes. */ 103 #define AT_TIMEKEEP 22 /* Pointer to timehands. */ 104 #define AT_STACKPROT 23 /* Initial stack protection. */ 105 #define AT_EHDRFLAGS 24 /* e_flags field from elf hdr */ 106 #define AT_HWCAP 25 /* CPU feature flags. */ 107 #define AT_HWCAP2 26 /* CPU feature flags 2. */ 108 109 #define AT_COUNT 27 /* Count of defined aux entry types. */ 110 111 /* 112 * Relocation types. 113 */ 114 115 #define R_386_COUNT 38 /* Count of defined relocation types. */ 116 117 /* Define "machine" characteristics */ 118 #define ELF_TARG_CLASS ELFCLASS32 119 #define ELF_TARG_DATA ELFDATA2LSB 120 #define ELF_TARG_MACH EM_386 121 #define ELF_TARG_VER 1 122 123 #define ET_DYN_LOAD_ADDR 0x01001000 124 125 #elif defined(__amd64__) 126 127 /* 128 * ELF definitions for the AMD64 architecture. 129 */ 130 131 #ifndef __ELF_WORD_SIZE 132 #define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */ 133 #endif 134 #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 135 #include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */ 136 #include <sys/elf_generic.h> 137 138 #define ELF_ARCH EM_X86_64 139 #define ELF_ARCH32 EM_386 140 141 #define ELF_MACHINE_OK(x) ((x) == EM_X86_64) 142 143 /* 144 * Auxiliary vector entries for passing information to the interpreter. 145 * 146 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 147 * but POSIX lays claim to all symbols ending with "_t". 148 */ 149 typedef struct { /* Auxiliary vector entry on initial stack */ 150 int a_type; /* Entry type. */ 151 union { 152 int a_val; /* Integer value. */ 153 } a_un; 154 } Elf32_Auxinfo; 155 156 157 typedef struct { /* Auxiliary vector entry on initial stack */ 158 long a_type; /* Entry type. */ 159 union { 160 long a_val; /* Integer value. */ 161 void *a_ptr; /* Address. */ 162 void (*a_fcn)(void); /* Function pointer (not used). */ 163 } a_un; 164 } Elf64_Auxinfo; 165 166 __ElfType(Auxinfo); 167 168 /* Values for a_type. */ 169 #define AT_NULL 0 /* Terminates the vector. */ 170 #define AT_IGNORE 1 /* Ignored entry. */ 171 #define AT_EXECFD 2 /* File descriptor of program to load. */ 172 #define AT_PHDR 3 /* Program header of program already loaded. */ 173 #define AT_PHENT 4 /* Size of each program header entry. */ 174 #define AT_PHNUM 5 /* Number of program header entries. */ 175 #define AT_PAGESZ 6 /* Page size in bytes. */ 176 #define AT_BASE 7 /* Interpreter's base address. */ 177 #define AT_FLAGS 8 /* Flags (unused for i386). */ 178 #define AT_ENTRY 9 /* Where interpreter should transfer control. */ 179 #define AT_NOTELF 10 /* Program is not ELF ?? */ 180 #define AT_UID 11 /* Real uid. */ 181 #define AT_EUID 12 /* Effective uid. */ 182 #define AT_GID 13 /* Real gid. */ 183 #define AT_EGID 14 /* Effective gid. */ 184 #define AT_EXECPATH 15 /* Path to the executable. */ 185 #define AT_CANARY 16 /* Canary for SSP */ 186 #define AT_CANARYLEN 17 /* Length of the canary. */ 187 #define AT_OSRELDATE 18 /* OSRELDATE. */ 188 #define AT_NCPUS 19 /* Number of CPUs. */ 189 #define AT_PAGESIZES 20 /* Pagesizes. */ 190 #define AT_PAGESIZESLEN 21 /* Number of pagesizes. */ 191 #define AT_TIMEKEEP 22 /* Pointer to timehands. */ 192 #define AT_STACKPROT 23 /* Initial stack protection. */ 193 #define AT_EHDRFLAGS 24 /* e_flags field from elf hdr */ 194 #define AT_HWCAP 25 /* CPU feature flags. */ 195 #define AT_HWCAP2 26 /* CPU feature flags 2. */ 196 197 #define AT_COUNT 27 /* Count of defined aux entry types. */ 198 199 /* 200 * Relocation types. 201 */ 202 203 #define R_X86_64_COUNT 24 /* Count of defined relocation types. */ 204 205 /* Define "machine" characteristics */ 206 #if __ELF_WORD_SIZE == 32 207 #define ELF_TARG_CLASS ELFCLASS32 208 #else 209 #define ELF_TARG_CLASS ELFCLASS64 210 #endif 211 #define ELF_TARG_DATA ELFDATA2LSB 212 #define ELF_TARG_MACH EM_X86_64 213 #define ELF_TARG_VER 1 214 215 #if __ELF_WORD_SIZE == 32 216 #define ET_DYN_LOAD_ADDR 0x01001000 217 #else 218 #define ET_DYN_LOAD_ADDR 0x01021000 219 #endif 220 221 #endif /* __i386__, __amd64__ */ 222 223 #endif /* !_MACHINE_ELF_H_ */ 224