1 /*- 2 * Copyright (c) 1996-1997 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 * $FreeBSD$ 27 */ 28 29 #ifndef _MACHINE_ELF_H_ 30 #define _MACHINE_ELF_H_ 1 31 32 #if defined(__i386__) || defined(_MACHINE_ELF_WANT_32BIT) 33 34 /* 35 * ELF definitions for the i386 architecture. 36 */ 37 38 #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 39 #if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64 40 #include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */ 41 #endif 42 43 #ifndef __ELF_WORD_SIZE 44 #define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */ 45 #endif 46 47 #include <sys/elf_generic.h> 48 49 #define ELF_ARCH EM_386 50 51 #define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486) 52 53 /* 54 * Auxiliary vector entries for passing information to the interpreter. 55 * 56 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 57 * but POSIX lays claim to all symbols ending with "_t". 58 */ 59 60 typedef struct { /* Auxiliary vector entry on initial stack */ 61 int a_type; /* Entry type. */ 62 union { 63 long a_val; /* Integer value. */ 64 void *a_ptr; /* Address. */ 65 void (*a_fcn)(void); /* Function pointer (not used). */ 66 } a_un; 67 } Elf32_Auxinfo; 68 69 #if __ELF_WORD_SIZE == 64 70 /* Fake for amd64 loader support */ 71 typedef struct { 72 int fake; 73 } Elf64_Auxinfo; 74 #endif 75 76 __ElfType(Auxinfo); 77 78 /* Values for a_type. */ 79 #define AT_NULL 0 /* Terminates the vector. */ 80 #define AT_IGNORE 1 /* Ignored entry. */ 81 #define AT_EXECFD 2 /* File descriptor of program to load. */ 82 #define AT_PHDR 3 /* Program header of program already loaded. */ 83 #define AT_PHENT 4 /* Size of each program header entry. */ 84 #define AT_PHNUM 5 /* Number of program header entries. */ 85 #define AT_PAGESZ 6 /* Page size in bytes. */ 86 #define AT_BASE 7 /* Interpreter's base address. */ 87 #define AT_FLAGS 8 /* Flags (unused for i386). */ 88 #define AT_ENTRY 9 /* Where interpreter should transfer control. */ 89 #define AT_NOTELF 10 /* Program is not ELF ?? */ 90 #define AT_UID 11 /* Real uid. */ 91 #define AT_EUID 12 /* Effective uid. */ 92 #define AT_GID 13 /* Real gid. */ 93 #define AT_EGID 14 /* Effective gid. */ 94 #define AT_EXECPATH 15 /* Path to the executable. */ 95 #define AT_CANARY 16 /* Canary for SSP. */ 96 #define AT_CANARYLEN 17 /* Length of the canary. */ 97 #define AT_OSRELDATE 18 /* OSRELDATE. */ 98 #define AT_NCPUS 19 /* Number of CPUs. */ 99 #define AT_PAGESIZES 20 /* Pagesizes. */ 100 #define AT_PAGESIZESLEN 21 /* Number of pagesizes. */ 101 #define AT_TIMEKEEP 22 /* Pointer to timehands. */ 102 #define AT_STACKPROT 23 /* Initial stack protection. */ 103 104 #define AT_COUNT 24 /* Count of defined aux entry types. */ 105 106 /* 107 * Relocation types. 108 */ 109 110 #define R_386_COUNT 38 /* Count of defined relocation types. */ 111 112 /* Define "machine" characteristics */ 113 #define ELF_TARG_CLASS ELFCLASS32 114 #define ELF_TARG_DATA ELFDATA2LSB 115 #define ELF_TARG_MACH EM_386 116 #define ELF_TARG_VER 1 117 118 #define ET_DYN_LOAD_ADDR 0x01001000 119 120 #elif defined(__amd64__) 121 122 /* 123 * ELF definitions for the AMD64 architecture. 124 */ 125 126 #ifndef __ELF_WORD_SIZE 127 #define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */ 128 #endif 129 #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 130 #include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */ 131 #include <sys/elf_generic.h> 132 133 #define ELF_ARCH EM_X86_64 134 #define ELF_ARCH32 EM_386 135 136 #define ELF_MACHINE_OK(x) ((x) == EM_X86_64) 137 138 /* 139 * Auxiliary vector entries for passing information to the interpreter. 140 * 141 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 142 * but POSIX lays claim to all symbols ending with "_t". 143 */ 144 typedef struct { /* Auxiliary vector entry on initial stack */ 145 int a_type; /* Entry type. */ 146 union { 147 int a_val; /* Integer value. */ 148 } a_un; 149 } Elf32_Auxinfo; 150 151 152 typedef struct { /* Auxiliary vector entry on initial stack */ 153 long a_type; /* Entry type. */ 154 union { 155 long a_val; /* Integer value. */ 156 void *a_ptr; /* Address. */ 157 void (*a_fcn)(void); /* Function pointer (not used). */ 158 } a_un; 159 } Elf64_Auxinfo; 160 161 __ElfType(Auxinfo); 162 163 /* Values for a_type. */ 164 #define AT_NULL 0 /* Terminates the vector. */ 165 #define AT_IGNORE 1 /* Ignored entry. */ 166 #define AT_EXECFD 2 /* File descriptor of program to load. */ 167 #define AT_PHDR 3 /* Program header of program already loaded. */ 168 #define AT_PHENT 4 /* Size of each program header entry. */ 169 #define AT_PHNUM 5 /* Number of program header entries. */ 170 #define AT_PAGESZ 6 /* Page size in bytes. */ 171 #define AT_BASE 7 /* Interpreter's base address. */ 172 #define AT_FLAGS 8 /* Flags (unused for i386). */ 173 #define AT_ENTRY 9 /* Where interpreter should transfer control. */ 174 #define AT_NOTELF 10 /* Program is not ELF ?? */ 175 #define AT_UID 11 /* Real uid. */ 176 #define AT_EUID 12 /* Effective uid. */ 177 #define AT_GID 13 /* Real gid. */ 178 #define AT_EGID 14 /* Effective gid. */ 179 #define AT_EXECPATH 15 /* Path to the executable. */ 180 #define AT_CANARY 16 /* Canary for SSP */ 181 #define AT_CANARYLEN 17 /* Length of the canary. */ 182 #define AT_OSRELDATE 18 /* OSRELDATE. */ 183 #define AT_NCPUS 19 /* Number of CPUs. */ 184 #define AT_PAGESIZES 20 /* Pagesizes. */ 185 #define AT_PAGESIZESLEN 21 /* Number of pagesizes. */ 186 #define AT_TIMEKEEP 22 /* Pointer to timehands. */ 187 #define AT_STACKPROT 23 /* Initial stack protection. */ 188 189 #define AT_COUNT 24 /* Count of defined aux entry types. */ 190 191 /* 192 * Relocation types. 193 */ 194 195 #define R_X86_64_COUNT 24 /* Count of defined relocation types. */ 196 197 /* Define "machine" characteristics */ 198 #if __ELF_WORD_SIZE == 32 199 #define ELF_TARG_CLASS ELFCLASS32 200 #else 201 #define ELF_TARG_CLASS ELFCLASS64 202 #endif 203 #define ELF_TARG_DATA ELFDATA2LSB 204 #define ELF_TARG_MACH EM_X86_64 205 #define ELF_TARG_VER 1 206 207 #if __ELF_WORD_SIZE == 32 208 #define ET_DYN_LOAD_ADDR 0x01001000 209 #else 210 #define ET_DYN_LOAD_ADDR 0x01021000 211 #endif 212 213 #endif /* __i386__, __amd64__ */ 214 215 #endif /* !_MACHINE_ELF_H_ */ 216