include/elf/common.h

   1 /* ELF support for BFD.
   2    Copyright (C) 1991, 1992, 1993, 1994, 1996 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 /* If it is necessary to assign new unofficial EM_* values, please pick large
  94    random numbers (0x8523, 0xa7f2, etc.) to minimize the chances of collision
  95    with official or non-GNU unofficial values.
  96
  97    NOTE: Do not just increment the most recent number by one.
  98    Somebody else somewhere will do exactly the same thing, and you
  99    will have a collision.  Instead, pick a random number.  */
 100
 101 /* Cygnus PowerPC ELF backend.  Written in the absence of an ABI.  */
 102 #define EM_CYGNUS_POWERPC 0x9025
 103
 104 /* Old version of PowerPC, this should be removed shortly. */
 105 #define EM_PPC_OLD      17
 106
 107 /* start-sanitize-arc */
 108 /* Cygnus ARC ELF backend.  Written in the absence of an ABI.  */
 109 #define EM_CYGNUS_ARC 0x9040
 110 /* end-sanitize-arc */
 111
 112 /* Alpha backend magic number.  Written in the absence of an ABI.  */
 113 #define EM_ALPHA        0x9026
 114
 115 /* start-sanitize-d10v */
 116 /* D10V backend magic number.  Written in the absence of an ABI.  */
 117 #define EM_CYGNUS_D10V  0x9027
 118 /* end-sanitize-d10v */
 119
 120 /* See the above comment before you add a new EM_* value here.  */
 121
 122 /* Values for e_version */
 123
 124 #define EV_NONE         0               /* Invalid ELF version */
 125 #define EV_CURRENT      1               /* Current version */
 126
 127 /* Values for program header, p_type field */
 128
 129 #define PT_NULL         0               /* Program header table entry unused */
 130 #define PT_LOAD         1               /* Loadable program segment */
 131 #define PT_DYNAMIC      2               /* Dynamic linking information */
 132 #define PT_INTERP       3               /* Program interpreter */
 133 #define PT_NOTE         4               /* Auxiliary information */
 134 #define PT_SHLIB        5               /* Reserved, unspecified semantics */
 135 #define PT_PHDR         6               /* Entry for header table itself */
 136 #define PT_LOPROC       0x70000000      /* Processor-specific */
 137 #define PT_HIPROC       0x7FFFFFFF      /* Processor-specific */
 138
 139 /* Program segment permissions, in program header p_flags field */
 140
 141 #define PF_X            (1 << 0)        /* Segment is executable */
 142 #define PF_W            (1 << 1)        /* Segment is writable */
 143 #define PF_R            (1 << 2)        /* Segment is readable */
 144 #define PF_MASKPROC     0xF0000000      /* Processor-specific reserved bits */
 145
 146 /* Values for section header, sh_type field */
 147
 148 #define SHT_NULL        0               /* Section header table entry unused */
 149 #define SHT_PROGBITS    1               /* Program specific (private) data */
 150 #define SHT_SYMTAB      2               /* Link editing symbol table */
 151 #define SHT_STRTAB      3               /* A string table */
 152 #define SHT_RELA        4               /* Relocation entries with addends */
 153 #define SHT_HASH        5               /* A symbol hash table */
 154 #define SHT_DYNAMIC     6               /* Information for dynamic linking */
 155 #define SHT_NOTE        7               /* Information that marks file */
 156 #define SHT_NOBITS      8               /* Section occupies no space in file */
 157 #define SHT_REL         9               /* Relocation entries, no addends */
 158 #define SHT_SHLIB       10              /* Reserved, unspecified semantics */
 159 #define SHT_DYNSYM      11              /* Dynamic linking symbol table */
 160 #define SHT_LOPROC      0x70000000      /* Processor-specific semantics, lo */
 161 #define SHT_HIPROC      0x7FFFFFFF      /* Processor-specific semantics, hi */
 162 #define SHT_LOUSER      0x80000000      /* Application-specific semantics */
 163 #define SHT_HIUSER      0x8FFFFFFF      /* Application-specific semantics */
 164
 165 /* Values for section header, sh_flags field */
 166
 167 #define SHF_WRITE       (1 << 0)        /* Writable data during execution */
 168 #define SHF_ALLOC       (1 << 1)        /* Occupies memory during execution */
 169 #define SHF_EXECINSTR   (1 << 2)        /* Executable machine instructions */
 170 #define SHF_MASKPROC    0xF0000000      /* Processor-specific semantics */
 171
 172 /* Values of note segment descriptor types for core files. */
 173
 174 #define NT_PRSTATUS     1               /* Contains copy of prstatus struct */
 175 #define NT_FPREGSET     2               /* Contains copy of fpregset struct */
 176 #define NT_PRPSINFO     3               /* Contains copy of prpsinfo struct */
 177
 178 /* Values of note segment descriptor types for object files.  */
 179 /* (Only for hppa right now.  Should this be moved elsewhere?)  */
 180
 181 #define NT_VERSION      1               /* Contains a version string.  */
 182
 183 /* These three macros disassemble and assemble a symbol table st_info field,
 184    which contains the symbol binding and symbol type.  The STB_ and STT_
 185    defines identify the binding and type. */
 186
 187 #define ELF_ST_BIND(val)                (((unsigned int)(val)) >> 4)
 188 #define ELF_ST_TYPE(val)                ((val) & 0xF)
 189 #define ELF_ST_INFO(bind,type)          (((bind) << 4) + ((type) & 0xF))
 190
 191 #define STN_UNDEF       0               /* undefined symbol index */
 192
 193 #define STB_LOCAL       0               /* Symbol not visible outside obj */
 194 #define STB_GLOBAL      1               /* Symbol visible outside obj */
 195 #define STB_WEAK        2               /* Like globals, lower precedence */
 196 #define STB_LOPROC      13              /* Application-specific semantics */
 197 #define STB_HIPROC      15              /* Application-specific semantics */
 198
 199 #define STT_NOTYPE      0               /* Symbol type is unspecified */
 200 #define STT_OBJECT      1               /* Symbol is a data object */
 201 #define STT_FUNC        2               /* Symbol is a code object */
 202 #define STT_SECTION     3               /* Symbol associated with a section */
 203 #define STT_FILE        4               /* Symbol gives a file name */
 204 #define STT_LOPROC      13              /* Application-specific semantics */
 205 #define STT_HIPROC      15              /* Application-specific semantics */
 206
 207 /* Special section indices, which may show up in st_shndx fields, among
 208    other places. */
 209
 210 #define SHN_UNDEF       0               /* Undefined section reference */
 211 #define SHN_LORESERVE   0xFF00          /* Begin range of reserved indices */
 212 #define SHN_LOPROC      0xFF00          /* Begin range of appl-specific */
 213 #define SHN_HIPROC      0xFF1F          /* End range of appl-specific */
 214 #define SHN_ABS         0xFFF1          /* Associated symbol is absolute */
 215 #define SHN_COMMON      0xFFF2          /* Associated symbol is in common */
 216 #define SHN_HIRESERVE   0xFFFF          /* End range of reserved indices */
 217
 218 /* relocation info handling macros */
 219
 220 #define ELF32_R_SYM(i)          ((i) >> 8)
 221 #define ELF32_R_TYPE(i)         ((i) & 0xff)
 222 #define ELF32_R_INFO(s,t)       (((s) << 8) + ((t) & 0xff))
 223
 224 #define ELF64_R_SYM(i)          ((i) >> 32)
 225 #define ELF64_R_TYPE(i)         ((i) & 0xffffffff)
 226 #define ELF64_R_INFO(s,t)       (((bfd_vma) (s) << 32) + (bfd_vma) (t))
 227
 228 /* Dynamic section tags */
 229
 230 #define DT_NULL         0
 231 #define DT_NEEDED       1
 232 #define DT_PLTRELSZ     2
 233 #define DT_PLTGOT       3
 234 #define DT_HASH         4
 235 #define DT_STRTAB       5
 236 #define DT_SYMTAB       6
 237 #define DT_RELA         7
 238 #define DT_RELASZ       8
 239 #define DT_RELAENT      9
 240 #define DT_STRSZ        10
 241 #define DT_SYMENT       11
 242 #define DT_INIT         12
 243 #define DT_FINI         13
 244 #define DT_SONAME       14
 245 #define DT_RPATH        15
 246 #define DT_SYMBOLIC     16
 247 #define DT_REL          17
 248 #define DT_RELSZ        18
 249 #define DT_RELENT       19
 250 #define DT_PLTREL       20
 251 #define DT_DEBUG        21
 252 #define DT_TEXTREL      22
 253 #define DT_JMPREL       23
 254 #define DT_LOPROC       0x70000000
 255 #define DT_HIPROC       0x7fffffff
 256
 257 #endif /* _ELF_COMMON_H */