include/elf/common.h

   1 /* ELF support for BFD.
   2    Copyright (C) 1991, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
   3
   4    Written by Fred Fish @ Cygnus Support, from information published
   5    in "UNIX System V Release 4, Programmers Guide: ANSI C and
   6    Programming Support Tools".
   7
   8 This file is part of BFD, the Binary File Descriptor library.
   9
  10 This program is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2 of the License, or
  13 (at your option) any later version.
  14
  15 This program is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with this program; if not, write to the Free Software
  22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  23
  24
  25 /* This file is part of ELF support for BFD, and contains the portions
  26    that are common to both the internal and external representations.
  27    For example, ELFMAG0 is the byte 0x7F in both the internal (in-memory)
  28    and external (in-file) representations. */
  29
  30 #ifndef _ELF_COMMON_H
  31 #define _ELF_COMMON_H
  32
  33 /* Fields in e_ident[] */
  34
  35 #define EI_MAG0         0               /* File identification byte 0 index */
  36 #define ELFMAG0         0x7F            /* Magic number byte 0 */
  37
  38 #define EI_MAG1         1               /* File identification byte 1 index */
  39 #define ELFMAG1         'E'             /* Magic number byte 1 */
  40
  41 #define EI_MAG2         2               /* File identification byte 2 index */
  42 #define ELFMAG2         'L'             /* Magic number byte 2 */
  43
  44 #define EI_MAG3         3               /* File identification byte 3 index */
  45 #define ELFMAG3         'F'             /* Magic number byte 3 */
  46
  47 #define EI_CLASS        4               /* File class */
  48 #define ELFCLASSNONE    0               /* Invalid class */
  49 #define ELFCLASS32      1               /* 32-bit objects */
  50 #define ELFCLASS64      2               /* 64-bit objects */
  51
  52 #define EI_DATA         5               /* Data encoding */
  53 #define ELFDATANONE     0               /* Invalid data encoding */
  54 #define ELFDATA2LSB     1               /* 2's complement, little endian */
  55 #define ELFDATA2MSB     2               /* 2's complement, big endian */
  56
  57 #define EI_VERSION      6               /* File version */
  58
  59 #define EI_PAD          7               /* Start of padding bytes */
  60
  61
  62 /* Values for e_type, which identifies the object file type */
  63
  64 #define ET_NONE         0               /* No file type */
  65 #define ET_REL          1               /* Relocatable file */
  66 #define ET_EXEC         2               /* Executable file */
  67 #define ET_DYN          3               /* Shared object file */
  68 #define ET_CORE         4               /* Core file */
  69 #define ET_LOPROC       0xFF00          /* Processor-specific */
  70 #define ET_HIPROC       0xFFFF          /* Processor-specific */
  71
  72 /* Values for e_machine, which identifies the architecture */
  73
  74 #define EM_NONE         0       /* No machine */
  75 #define EM_M32          1       /* AT&T WE 32100 */
  76 #define EM_SPARC        2       /* SUN SPARC */
  77 #define EM_386          3       /* Intel 80386 */
  78 #define EM_68K          4       /* Motorola m68k family */
  79 #define EM_88K          5       /* Motorola m88k family */
  80 #define EM_860          7       /* Intel 80860 */
  81 #define EM_MIPS         8       /* MIPS R3000 (officially, big-endian only) */
  82
  83 #define EM_MIPS_RS4_BE 10       /* MIPS R4000 big-endian */
  84
  85 #define EM_SPARC64     11       /* SPARC v9 (not official) 64-bit */
  86
  87 #define EM_PARISC      15       /* HPPA */
  88
  89 #define EM_SPARC32PLUS 18       /* Sun's "v8plus" */
  90
  91 #define EM_PPC         20       /* PowerPC */
  92
  93 #define EM_SH          42       /* Hitachi SH */
  94
  95 /* If it is necessary to assign new unofficial EM_* values, please pick large
  96    random numbers (0x8523, 0xa7f2, etc.) to minimize the chances of collision
  97    with official or non-GNU unofficial values.
  98
  99    NOTE: Do not just increment the most recent number by one.
 100    Somebody else somewhere will do exactly the same thing, and you
 101    will have a collision.  Instead, pick a random number.  */
 102
 103 /* Cygnus PowerPC ELF backend.  Written in the absence of an ABI.  */
 104 #define EM_CYGNUS_POWERPC 0x9025
 105
 106 /* Old version of PowerPC, this should be removed shortly. */
 107 #define EM_PPC_OLD      17
 108
 109 /* start-sanitize-arc */
 110 /* Cygnus ARC ELF backend.  Written in the absence of an ABI.  */
 111 #define EM_CYGNUS_ARC 0x9040
 112 /* end-sanitize-arc */
 113
 114 /* start-sanitize-m32r */
 115 /* Cygnus M32R ELF backend.  Written in the absence of an ABI.  */
 116 #define EM_CYGNUS_M32R 0x9041
 117 /* end-sanitize-m32r */
 118
 119 /* Alpha backend magic number.  Written in the absence of an ABI.  */
 120 #define EM_ALPHA        0x9026
 121
 122 /* D10V backend magic number.  Written in the absence of an ABI.  */
 123 #define EM_CYGNUS_D10V  0x7650
 124
 125 /* start-sanitize-d30v */
 126 /* D30V backend magic number.  Written in the absence of an ABI.  */
 127 #define EM_CYGNUS_D30V  0x7676
 128 /* end-sanitize-d30v */
 129
 130 /* start-sanitize-v850 */
 131 /* V850 backend magic number.  Written in the absense of an ABI.  */
 132 #define EM_CYGNUS_V850  0x9080
 133 /* end-sanitize-v850 */
 134
 135 /* mn10200 and mn10300 backend magic numbers.
 136    Written in the absense of an ABI.  */
 137 #define EM_CYGNUS_MN10200       0xdead
 138 #define EM_CYGNUS_MN10300       0xbeef
 139
 140 /* See the above comment before you add a new EM_* value here.  */
 141
 142 /* Values for e_version */
 143
 144 #define EV_NONE         0               /* Invalid ELF version */
 145 #define EV_CURRENT      1               /* Current version */
 146
 147 /* Values for program header, p_type field */
 148
 149 #define PT_NULL         0               /* Program header table entry unused */
 150 #define PT_LOAD         1               /* Loadable program segment */
 151 #define PT_DYNAMIC      2               /* Dynamic linking information */
 152 #define PT_INTERP       3               /* Program interpreter */
 153 #define PT_NOTE         4               /* Auxiliary information */
 154 #define PT_SHLIB        5               /* Reserved, unspecified semantics */
 155 #define PT_PHDR         6               /* Entry for header table itself */
 156 #define PT_LOPROC       0x70000000      /* Processor-specific */
 157 #define PT_HIPROC       0x7FFFFFFF      /* Processor-specific */
 158
 159 /* Program segment permissions, in program header p_flags field */
 160
 161 #define PF_X            (1 << 0)        /* Segment is executable */
 162 #define PF_W            (1 << 1)        /* Segment is writable */
 163 #define PF_R            (1 << 2)        /* Segment is readable */
 164 #define PF_MASKPROC     0xF0000000      /* Processor-specific reserved bits */
 165
 166 /* Values for section header, sh_type field */
 167
 168 #define SHT_NULL        0               /* Section header table entry unused */
 169 #define SHT_PROGBITS    1               /* Program specific (private) data */
 170 #define SHT_SYMTAB      2               /* Link editing symbol table */
 171 #define SHT_STRTAB      3               /* A string table */
 172 #define SHT_RELA        4               /* Relocation entries with addends */
 173 #define SHT_HASH        5               /* A symbol hash table */
 174 #define SHT_DYNAMIC     6               /* Information for dynamic linking */
 175 #define SHT_NOTE        7               /* Information that marks file */
 176 #define SHT_NOBITS      8               /* Section occupies no space in file */
 177 #define SHT_REL         9               /* Relocation entries, no addends */
 178 #define SHT_SHLIB       10              /* Reserved, unspecified semantics */
 179 #define SHT_DYNSYM      11              /* Dynamic linking symbol table */
 180
 181 /* The next three section types are defined by Solaris, and are named
 182    SHT_SUNW*.  We use them in GNU code, so we also define SHT_GNU*
 183    versions.  */
 184 #define SHT_SUNW_verdef 0x6ffffffd      /* Versions defined by file */
 185 #define SHT_SUNW_verneed 0x6ffffffe     /* Versions needed by file */
 186 #define SHT_SUNW_versym 0x6fffffff      /* Symbol versions */
 187
 188 #define SHT_GNU_verdef  SHT_SUNW_verdef
 189 #define SHT_GNU_verneed SHT_SUNW_verneed
 190 #define SHT_GNU_versym  SHT_SUNW_versym
 191
 192 #define SHT_LOPROC      0x70000000      /* Processor-specific semantics, lo */
 193 #define SHT_HIPROC      0x7FFFFFFF      /* Processor-specific semantics, hi */
 194 #define SHT_LOUSER      0x80000000      /* Application-specific semantics */
 195 #define SHT_HIUSER      0x8FFFFFFF      /* Application-specific semantics */
 196
 197 /* Values for section header, sh_flags field */
 198
 199 #define SHF_WRITE       (1 << 0)        /* Writable data during execution */
 200 #define SHF_ALLOC       (1 << 1)        /* Occupies memory during execution */
 201 #define SHF_EXECINSTR   (1 << 2)        /* Executable machine instructions */
 202 #define SHF_MASKPROC    0xF0000000      /* Processor-specific semantics */
 203
 204 /* Values of note segment descriptor types for core files. */
 205
 206 #define NT_PRSTATUS     1               /* Contains copy of prstatus struct */
 207 #define NT_FPREGSET     2               /* Contains copy of fpregset struct */
 208 #define NT_PRPSINFO     3               /* Contains copy of prpsinfo struct */
 209
 210 /* Values of note segment descriptor types for object files.  */
 211 /* (Only for hppa right now.  Should this be moved elsewhere?)  */
 212
 213 #define NT_VERSION      1               /* Contains a version string.  */
 214
 215 /* These three macros disassemble and assemble a symbol table st_info field,
 216    which contains the symbol binding and symbol type.  The STB_ and STT_
 217    defines identify the binding and type. */
 218
 219 #define ELF_ST_BIND(val)                (((unsigned int)(val)) >> 4)
 220 #define ELF_ST_TYPE(val)                ((val) & 0xF)
 221 #define ELF_ST_INFO(bind,type)          (((bind) << 4) + ((type) & 0xF))
 222
 223 #define STN_UNDEF       0               /* undefined symbol index */
 224
 225 #define STB_LOCAL       0               /* Symbol not visible outside obj */
 226 #define STB_GLOBAL      1               /* Symbol visible outside obj */
 227 #define STB_WEAK        2               /* Like globals, lower precedence */
 228 #define STB_LOPROC      13              /* Application-specific semantics */
 229 #define STB_HIPROC      15              /* Application-specific semantics */
 230
 231 #define STT_NOTYPE      0               /* Symbol type is unspecified */
 232 #define STT_OBJECT      1               /* Symbol is a data object */
 233 #define STT_FUNC        2               /* Symbol is a code object */
 234 #define STT_SECTION     3               /* Symbol associated with a section */
 235 #define STT_FILE        4               /* Symbol gives a file name */
 236 #define STT_LOPROC      13              /* Application-specific semantics */
 237 #define STT_HIPROC      15              /* Application-specific semantics */
 238
 239 /* Special section indices, which may show up in st_shndx fields, among
 240    other places. */
 241
 242 #define SHN_UNDEF       0               /* Undefined section reference */
 243 #define SHN_LORESERVE   0xFF00          /* Begin range of reserved indices */
 244 #define SHN_LOPROC      0xFF00          /* Begin range of appl-specific */
 245 #define SHN_HIPROC      0xFF1F          /* End range of appl-specific */
 246 #define SHN_ABS         0xFFF1          /* Associated symbol is absolute */
 247 #define SHN_COMMON      0xFFF2          /* Associated symbol is in common */
 248 #define SHN_HIRESERVE   0xFFFF          /* End range of reserved indices */
 249
 250 /* relocation info handling macros */
 251
 252 #define ELF32_R_SYM(i)          ((i) >> 8)
 253 #define ELF32_R_TYPE(i)         ((i) & 0xff)
 254 #define ELF32_R_INFO(s,t)       (((s) << 8) + ((t) & 0xff))
 255
 256 #define ELF64_R_SYM(i)          ((i) >> 32)
 257 #define ELF64_R_TYPE(i)         ((i) & 0xffffffff)
 258 #define ELF64_R_INFO(s,t)       (((bfd_vma) (s) << 32) + (bfd_vma) (t))
 259
 260 /* Dynamic section tags */
 261
 262 #define DT_NULL         0
 263 #define DT_NEEDED       1
 264 #define DT_PLTRELSZ     2
 265 #define DT_PLTGOT       3
 266 #define DT_HASH         4
 267 #define DT_STRTAB       5
 268 #define DT_SYMTAB       6
 269 #define DT_RELA         7
 270 #define DT_RELASZ       8
 271 #define DT_RELAENT      9
 272 #define DT_STRSZ        10
 273 #define DT_SYMENT       11
 274 #define DT_INIT         12
 275 #define DT_FINI         13
 276 #define DT_SONAME       14
 277 #define DT_RPATH        15
 278 #define DT_SYMBOLIC     16
 279 #define DT_REL          17
 280 #define DT_RELSZ        18
 281 #define DT_RELENT       19
 282 #define DT_PLTREL       20
 283 #define DT_DEBUG        21
 284 #define DT_TEXTREL      22
 285 #define DT_JMPREL       23
 286
 287 /* The next four dynamic tags are used on Solaris.  We support them
 288    everywhere.  */
 289 #define DT_VERDEF       0x6ffffffc
 290 #define DT_VERDEFNUM    0x6ffffffd
 291 #define DT_VERNEED      0x6ffffffe
 292 #define DT_VERNEEDNUM   0x6fffffff
 293
 294 /* This tag is a GNU extension to the Solaris version scheme.  */
 295 #define DT_VERSYM       0x6ffffff0
 296
 297 #define DT_LOPROC       0x70000000
 298 #define DT_HIPROC       0x7fffffff
 299
 300 /* These section tags are used on Solaris.  We support them
 301    everywhere, and hope they do not conflict.  */
 302
 303 #define DT_AUXILIARY    0x7ffffffd
 304 #define DT_FILTER       0x7fffffff
 305
 306 /* These constants are used for the version number of a Elf32_Verdef
 307    structure.  */
 308
 309 #define VER_DEF_NONE            0
 310 #define VER_DEF_CURRENT         1
 311
 312 /* These constants appear in the vd_flags field of a Elf32_Verdef
 313    structure.  */
 314
 315 #define VER_FLG_BASE            0x1
 316 #define VER_FLG_WEAK            0x2
 317
 318 /* These special constants can be found in an Elf32_Versym field.  */
 319
 320 #define VER_NDX_LOCAL           0
 321 #define VER_NDX_GLOBAL          1
 322
 323 /* These constants are used for the version number of a Elf32_Verneed
 324    structure.  */
 325
 326 #define VER_NEED_NONE           0
 327 #define VER_NEED_CURRENT        1
 328
 329 /* This is a special token which appears as part of a symbol name.  It
 330    indictes that the rest of the name is actually the name of a
 331    version node, and is not part of the actual name.  This is a GNU
 332    extension.  For example, the symbol name `stat@ver2' is taken to
 333    mean the symbol `stat' in version `ver2'.  */
 334
 335 #define ELF_VER_CHR     '@'
 336
 337 #endif /* _ELF_COMMON_H */