usr/src/boot/sys/x86/include/elf.h

   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_ */