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 #define AT_EHDRFLAGS 24 /* e_flags field from elf hdr */ 104 #define AT_HWCAP 25 /* CPU feature flags. */ 105 #define AT_HWCAP2 26 /* CPU feature flags 2. */ 106 107 #define AT_COUNT 27 /* Count of defined aux entry types. */ 108 109 /* 110 * Relocation types. 111 */ 112 113 #define R_386_COUNT 38 /* Count of defined relocation types. */ 114 115 /* Define "machine" characteristics */ 116 #define ELF_TARG_CLASS ELFCLASS32 117 #define ELF_TARG_DATA ELFDATA2LSB 118 #define ELF_TARG_MACH EM_386 119 #define ELF_TARG_VER 1 120 121 #define ET_DYN_LOAD_ADDR 0x01001000 122 123 #elif defined(__amd64__) 124 125 /* 126 * ELF definitions for the AMD64 architecture. 127 */ 128 129 #ifndef __ELF_WORD_SIZE 130 #define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */ 131 #endif 132 #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 133 #include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */ 134 #include <sys/elf_generic.h> 135 136 #define ELF_ARCH EM_X86_64 137 #define ELF_ARCH32 EM_386 138 139 #define ELF_MACHINE_OK(x) ((x) == EM_X86_64) 140 141 /* 142 * Auxiliary vector entries for passing information to the interpreter. 143 * 144 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 145 * but POSIX lays claim to all symbols ending with "_t". 146 */ 147 typedef struct { /* Auxiliary vector entry on initial stack */ 148 int a_type; /* Entry type. */ 149 union { 150 int a_val; /* Integer value. */ 151 } a_un; 152 } Elf32_Auxinfo; 153 154 155 typedef struct { /* Auxiliary vector entry on initial stack */ 156 long a_type; /* Entry type. */ 157 union { 158 long a_val; /* Integer value. */ 159 void *a_ptr; /* Address. */ 160 void (*a_fcn)(void); /* Function pointer (not used). */ 161 } a_un; 162 } Elf64_Auxinfo; 163 164 __ElfType(Auxinfo); 165 166 /* Values for a_type. */ 167 #define AT_NULL 0 /* Terminates the vector. */ 168 #define AT_IGNORE 1 /* Ignored entry. */ 169 #define AT_EXECFD 2 /* File descriptor of program to load. */ 170 #define AT_PHDR 3 /* Program header of program already loaded. */ 171 #define AT_PHENT 4 /* Size of each program header entry. */ 172 #define AT_PHNUM 5 /* Number of program header entries. */ 173 #define AT_PAGESZ 6 /* Page size in bytes. */ 174 #define AT_BASE 7 /* Interpreter's base address. */ 175 #define AT_FLAGS 8 /* Flags (unused for i386). */ 176 #define AT_ENTRY 9 /* Where interpreter should transfer control. */ 177 #define AT_NOTELF 10 /* Program is not ELF ?? */ 178 #define AT_UID 11 /* Real uid. */ 179 #define AT_EUID 12 /* Effective uid. */ 180 #define AT_GID 13 /* Real gid. */ 181 #define AT_EGID 14 /* Effective gid. */ 182 #define AT_EXECPATH 15 /* Path to the executable. */ 183 #define AT_CANARY 16 /* Canary for SSP */ 184 #define AT_CANARYLEN 17 /* Length of the canary. */ 185 #define AT_OSRELDATE 18 /* OSRELDATE. */ 186 #define AT_NCPUS 19 /* Number of CPUs. */ 187 #define AT_PAGESIZES 20 /* Pagesizes. */ 188 #define AT_PAGESIZESLEN 21 /* Number of pagesizes. */ 189 #define AT_TIMEKEEP 22 /* Pointer to timehands. */ 190 #define AT_STACKPROT 23 /* Initial stack protection. */ 191 #define AT_EHDRFLAGS 24 /* e_flags field from elf hdr */ 192 #define AT_HWCAP 25 /* CPU feature flags. */ 193 #define AT_HWCAP2 26 /* CPU feature flags 2. */ 194 195 #define AT_COUNT 27 /* Count of defined aux entry types. */ 196 197 /* 198 * Relocation types. 199 */ 200 201 #define R_X86_64_COUNT 24 /* Count of defined relocation types. */ 202 203 /* Define "machine" characteristics */ 204 #if __ELF_WORD_SIZE == 32 205 #define ELF_TARG_CLASS ELFCLASS32 206 #else 207 #define ELF_TARG_CLASS ELFCLASS64 208 #endif 209 #define ELF_TARG_DATA ELFDATA2LSB 210 #define ELF_TARG_MACH EM_X86_64 211 #define ELF_TARG_VER 1 212 213 #if __ELF_WORD_SIZE == 32 214 #define ET_DYN_LOAD_ADDR 0x01001000 215 #else 216 #define ET_DYN_LOAD_ADDR 0x01021000 217 #endif 218 219 #endif /* __i386__, __amd64__ */ 220 221 #endif /* !_MACHINE_ELF_H_ */ 222