elf/elf.h

   1 /* This file defines standard ELF types, structures, and macros.
   2 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   3 Contributed by Ian Lance Taylor (ian@cygnus.com).
   4
   5 This file is part of the GNU C Library.
   6
   7 The GNU C Library is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Library General Public License as
   9 published by the Free Software Foundation; either version 2 of the
  10 License, or (at your option) any later version.
  11
  12 The GNU C Library is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 Library General Public License for more details.
  16
  17 You should have received a copy of the GNU Library General Public
  18 License along with the GNU C Library; see the file COPYING.LIB.  If
  19 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  20 Cambridge, MA 02139, USA.  */
  21
  22 #ifndef _ELF_H
  23 #define _ELF_H 1
  24
  25
  26 /* Standard ELF types.  Using __attribute__ mode ensures that GCC
  27    will choose the right number of bits for these types.  */
  28
  29 /* Type for a 16-bit quantity.  */
  30 typedef unsigned int Elf32_Half    __attribute__ ((mode (HI)));
  31 typedef unsigned int Elf64_Half    __attribute__ ((mode (HI)));
  32
  33 /* Types for signed and unsigned 32-bit quantities.  */
  34 typedef unsigned int Elf32_Word    __attribute__ ((mode (SI)));
  35 typedef          int Elf32_Sword   __attribute__ ((mode (SI)));
  36 typedef unsigned int Elf64_Word    __attribute__ ((mode (SI)));
  37 typedef          int Elf64_Sword   __attribute__ ((mode (SI)));
  38
  39 /* Types for signed and unsigned 64-bit quantities.  */
  40 typedef unsigned int Elf32_Xword   __attribute__ ((mode (DI)));
  41 typedef          int Elf32_Sxword  __attribute__ ((mode (DI)));
  42 typedef unsigned int Elf64_Xword   __attribute__ ((mode (DI)));
  43 typedef          int Elf64_Sxword  __attribute__ ((mode (DI)));
  44
  45 /* Type of addresses.  */
  46 typedef unsigned int Elf32_Addr    __attribute__ ((mode (SI)));
  47 typedef unsigned int Elf64_Addr    __attribute__ ((mode (DI)));
  48
  49 /* Type of file offsets.  */
  50 typedef unsigned int Elf32_Off     __attribute__ ((mode (SI)));
  51 typedef unsigned int Elf64_Off     __attribute__ ((mode (DI)));
  52
  53 /* Type for section indices, which are 16-bit quantities.  */
  54 typedef unsigned int Elf32_Section __attribute__ ((mode (HI)));
  55 typedef unsigned int Elf64_Section __attribute__ ((mode (HI)));
  56
  57
  58 /* The ELF file header.  This appears at the start of every ELF file.  */
  59
  60 #define EI_NIDENT (16)
  61
  62 typedef struct
  63 {
  64   unsigned char e_ident[EI_NIDENT];     /* Magic number and other info */
  65   Elf32_Half    e_type;                 /* Object file type */
  66   Elf32_Half    e_machine;              /* Architecture */
  67   Elf32_Word    e_version;              /* Object file version */
  68   Elf32_Addr    e_entry;                /* Entry point virtual address */
  69   Elf32_Off     e_phoff;                /* Program header table file offset */
  70   Elf32_Off     e_shoff;                /* Section header table file offset */
  71   Elf32_Word    e_flags;                /* Processor-specific flags */
  72   Elf32_Half    e_ehsize;               /* ELF header size in bytes */
  73   Elf32_Half    e_phentsize;            /* Program header table entry size */
  74   Elf32_Half    e_phnum;                /* Program header table entry count */
  75   Elf32_Half    e_shentsize;            /* Section header table entry size */
  76   Elf32_Half    e_shnum;                /* Section header table entry count */
  77   Elf32_Half    e_shstrndx;             /* Section header string table index */
  78 } Elf32_Ehdr;
  79
  80 typedef struct
  81 {
  82   unsigned char e_ident[EI_NIDENT];     /* Magic number and other info */
  83   Elf64_Half    e_type;                 /* Object file type */
  84   Elf64_Half    e_machine;              /* Architecture */
  85   Elf64_Word    e_version;              /* Object file version */
  86   Elf64_Addr    e_entry;                /* Entry point virtual address */
  87   Elf64_Off     e_phoff;                /* Program header table file offset */
  88   Elf64_Off     e_shoff;                /* Section header table file offset */
  89   Elf64_Word    e_flags;                /* Processor-specific flags */
  90   Elf64_Half    e_ehsize;               /* ELF header size in bytes */
  91   Elf64_Half    e_phentsize;            /* Program header table entry size */
  92   Elf64_Half    e_phnum;                /* Program header table entry count */
  93   Elf64_Half    e_shentsize;            /* Section header table entry size */
  94   Elf64_Half    e_shnum;                /* Section header table entry count */
  95   Elf64_Half    e_shstrndx;             /* Section header string table index */
  96 } Elf64_Ehdr;
  97
  98 /* Fields in the e_ident array.  The EI_* macros are indices into the
  99    array.  The macros under each EI_* macro are the values the byte
 100    may have.  */
 101
 102 #define EI_MAG0         0               /* File identification byte 0 index */
 103 #define ELFMAG0         0x7f            /* Magic number byte 0 */
 104
 105 #define EI_MAG1         1               /* File identification byte 1 index */
 106 #define ELFMAG1         'E'             /* Magic number byte 1 */
 107
 108 #define EI_MAG2         2               /* File identification byte 2 index */
 109 #define ELFMAG2         'L'             /* Magic number byte 2 */
 110
 111 #define EI_MAG3         3               /* File identification byte 3 index */
 112 #define ELFMAG3         'F'             /* Magic number byte 3 */
 113
 114 /* Conglomeration of the identification bytes, for easy testing as a word.  */
 115 #define ELFMAG          "\177ELF"
 116 #define SELFMAG         4
 117
 118 #define EI_CLASS        4               /* File class byte index */
 119 #define ELFCLASSNONE    0               /* Invalid class */
 120 #define ELFCLASS32      1               /* 32-bit objects */
 121 #define ELFCLASS64      2               /* 64-bit objects */
 122
 123 #define EI_DATA         5               /* Data encoding byte index */
 124 #define ELFDATANONE     0               /* Invalid data encoding */
 125 #define ELFDATA2LSB     1               /* 2's complement, little endian */
 126 #define ELFDATA2MSB     2               /* 2's complement, big endian */
 127
 128 #define EI_VERSION      6               /* File version byte index */
 129                                         /* Value must be EV_CURRENT */
 130
 131 #define EI_PAD          7               /* Byte index of padding bytes */
 132
 133 /* Legal values for e_type (object file type).  */
 134
 135 #define ET_NONE         0               /* No file type */
 136 #define ET_REL          1               /* Relocatable file */
 137 #define ET_EXEC         2               /* Executable file */
 138 #define ET_DYN          3               /* Shared object file */
 139 #define ET_CORE         4               /* Core file */
 140 #define ET_NUM          5               /* Number of defined types.  */
 141 #define ET_LOPROC       0xff00          /* Processor-specific */
 142 #define ET_HIPROC       0xffff          /* Processor-specific */
 143
 144 /* Legal values for e_machine (architecture).  */
 145
 146 #define EM_NONE         0               /* No machine */
 147 #define EM_M32          1               /* AT&T WE 32100 */
 148 #define EM_SPARC        2               /* SUN SPARC */
 149 #define EM_386          3               /* Intel 80386 */
 150 #define EM_68K          4               /* Motorola m68k family */
 151 #define EM_88K          5               /* Motorola m88k family */
 152 #define EM_486          6               /* Intel 80486 */
 153 #define EM_860          7               /* Intel 80860 */
 154 #define EM_MIPS         8               /* MIPS R3000 big-endian */
 155 #define EM_S370         9               /* Amdahl */
 156 #define EM_MIPS_RS4_BE 10               /* MIPS R4000 big-endian */
 157
 158 #define EM_SPARC64     11               /* SPARC v9 (not official) 64-bit */
 159
 160 #define EM_PARISC      15               /* HPPA */
 161 #define EM_PPC         20               /* PowerPC */
 162
 163 /* If it is necessary to assign new unofficial EM_* values, please
 164    pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
 165    chances of collision with official or non-GNU unofficial values.  */
 166
 167 #define EM_ALPHA        0x9026
 168
 169 /* Legal values for e_version (version).  */
 170
 171 #define EV_NONE         0               /* Invalid ELF version */
 172 #define EV_CURRENT      1               /* Current version */
 173
 174 /* Section header.  */
 175
 176 typedef struct
 177 {
 178   Elf32_Word    sh_name;                /* Section name (string tbl index) */
 179   Elf32_Word    sh_type;                /* Section type */
 180   Elf32_Word    sh_flags;               /* Section flags */
 181   Elf32_Addr    sh_addr;                /* Section virtual addr at execution */
 182   Elf32_Off     sh_offset;              /* Section file offset */
 183   Elf32_Word    sh_size;                /* Section size in bytes */
 184   Elf32_Word    sh_link;                /* Link to another section */
 185   Elf32_Word    sh_info;                /* Additional section information */
 186   Elf32_Word    sh_addralign;           /* Section alignment */
 187   Elf32_Word    sh_entsize;             /* Entry size if section holds table */
 188 } Elf32_Shdr;
 189
 190 typedef struct
 191 {
 192   Elf64_Word    sh_name;                /* Section name (string tbl index) */
 193   Elf64_Word    sh_type;                /* Section type */
 194   Elf64_Xword   sh_flags;               /* Section flags */
 195   Elf64_Addr    sh_addr;                /* Section virtual addr at execution */
 196   Elf64_Off     sh_offset;              /* Section file offset */
 197   Elf64_Xword   sh_size;                /* Section size in bytes */
 198   Elf64_Word    sh_link;                /* Link to another section */
 199   Elf64_Word    sh_info;                /* Additional section information */
 200   Elf64_Xword   sh_addralign;           /* Section alignment */
 201   Elf64_Xword   sh_entsize;             /* Entry size if section holds table */
 202 } Elf64_Shdr;
 203
 204 /* Special section indices.  */
 205
 206 #define SHN_UNDEF       0               /* Undefined section */
 207 #define SHN_LORESERVE   0xff00          /* Start of reserved indices */
 208 #define SHN_LOPROC      0xff00          /* Start of processor-specific */
 209 #define SHN_HIPROC      0xff1f          /* End of processor-specific */
 210 #define SHN_ABS         0xfff1          /* Associated symbol is absolute */
 211 #define SHN_COMMON      0xfff2          /* Associated symbol is common */
 212 #define SHN_HIRESERVE   0xffff          /* End of reserved indices */
 213
 214 /* Legal values for sh_type (section type).  */
 215
 216 #define SHT_NULL        0               /* Section header table entry unused */
 217 #define SHT_PROGBITS    1               /* Program data */
 218 #define SHT_SYMTAB      2               /* Symbol table */
 219 #define SHT_STRTAB      3               /* String table */
 220 #define SHT_RELA        4               /* Relocation entries with addends */
 221 #define SHT_HASH        5               /* Symbol hash table */
 222 #define SHT_DYNAMIC     6               /* Dynamic linking information */
 223 #define SHT_NOTE        7               /* Notes */
 224 #define SHT_NOBITS      8               /* Program space with no data (bss) */
 225 #define SHT_REL         9               /* Relocation entries, no addends */
 226 #define SHT_SHLIB       10              /* Reserved */
 227 #define SHT_DYNSYM      11              /* Dynamic linker symbol table */
 228 #define SHT_NUM         12              /* Number of defined types.  */
 229 #define SHT_LOPROC      0x70000000      /* Start of processor-specific */
 230 #define SHT_HIPROC      0x7fffffff      /* End of processor-specific */
 231 #define SHT_LOUSER      0x80000000      /* Start of application-specific */
 232 #define SHT_HIUSER      0x8fffffff      /* End of application-specific */
 233
 234 /* Legal values for sh_flags (section flags).  */
 235
 236 #define SHF_WRITE       (1 << 0)        /* Writable */
 237 #define SHF_ALLOC       (1 << 1)        /* Occupies memory during execution */
 238 #define SHF_EXECINSTR   (1 << 2)        /* Executable */
 239 #define SHF_MASKPROC    0xf0000000      /* Processor-specific */
 240
 241 /* Symbol table entry.  */
 242
 243 typedef struct
 244 {
 245   Elf32_Word    st_name;                /* Symbol name (string tbl index) */
 246   Elf32_Addr    st_value;               /* Symbol value */
 247   Elf32_Word    st_size;                /* Symbol size */
 248   unsigned char st_info;                /* Symbol type and binding */
 249   unsigned char st_other;               /* No defined meaning, 0 */
 250   Elf32_Section st_shndx;               /* Section index */
 251 } Elf32_Sym;
 252
 253 typedef struct
 254 {
 255   Elf64_Word    st_name;                /* Symbol name (string tbl index) */
 256   unsigned char st_info;                /* Symbol type and binding */
 257   unsigned char st_other;               /* No defined meaning, 0 */
 258   Elf64_Section st_shndx;               /* Section index */
 259   Elf64_Addr    st_value;               /* Symbol value */
 260   Elf64_Xword   st_size;                /* Symbol size */
 261 } Elf64_Sym;
 262
 263 /* Special section index.  */
 264
 265 #define SHN_UNDEF       0               /* No section, undefined symbol.  */
 266
 267 /* How to extract and insert information held in the st_info field.  */
 268
 269 #define ELF32_ST_BIND(val)              (((unsigned char) (val)) >> 4)
 270 #define ELF32_ST_TYPE(val)              ((val) & 0xf)
 271 #define ELF32_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))
 272
 273 /* Both Elf32_Sym and Elf64_Sym use the same one-byte st_info field.  */
 274 #define ELF64_ST_BIND(val)              ELF32_ST_BIND (val)
 275 #define ELF64_ST_TYPE(val)              ELF32_ST_TYPE (val)
 276 #define ELF64_ST_INFO(bind, type)       ELF32_ST_INFO ((bind), (type))
 277
 278 /* Legal values for ST_BIND subfield of st_info (symbol binding).  */
 279
 280 #define STB_LOCAL       0               /* Local symbol */
 281 #define STB_GLOBAL      1               /* Global symbol */
 282 #define STB_WEAK        2               /* Weak symbol */
 283 #define STB_NUM         3               /* Number of defined types.  */
 284 #define STB_LOPROC      13              /* Start of processor-specific */
 285 #define STB_HIPROC      15              /* End of processor-specific */
 286
 287 /* Legal values for ST_TYPE subfield of st_info (symbol type).  */
 288
 289 #define STT_NOTYPE      0               /* Symbol type is unspecified */
 290 #define STT_OBJECT      1               /* Symbol is a data object */
 291 #define STT_FUNC        2               /* Symbol is a code object */
 292 #define STT_SECTION     3               /* Symbol associated with a section */
 293 #define STT_FILE        4               /* Symbol's name is file name */
 294 #define STT_NUM         5               /* Number of defined types.  */
 295 #define STT_LOPROC      13              /* Start of processor-specific */
 296 #define STT_HIPROC      15              /* End of processor-specific */
 297
 298
 299 /* Symbol table indices are found in the hash buckets and chain table
 300    of a symbol hash table section.  This special index value indicates
 301    the end of a chain, meaning no further symbols are found in that bucket.  */
 302
 303 #define STN_UNDEF       0               /* End of a chain.  */
 304
 305
 306 /* Relocation table entry without addend (in section of type SHT_REL).  */
 307
 308 typedef struct
 309 {
 310   Elf32_Addr    r_offset;               /* Address */
 311   Elf32_Word    r_info;                 /* Relocation type and symbol index */
 312 } Elf32_Rel;
 313
 314 /* I have seen two different definitions of the Elf64_Rel and
 315    Elf64_Rela structures, so we'll leave them out until Novell (or
 316    whoever) gets their act together.  */
 317 /* The following, at least, is used on Sparc v9, MIPS, and Alpha.  */
 318
 319 typedef struct
 320 {
 321   Elf64_Addr    r_offset;               /* Address */
 322   Elf64_Xword   r_info;                 /* Relocation type and symbol index */
 323 } Elf64_Rel;
 324
 325 /* Relocation table entry with addend (in section of type SHT_RELA).  */
 326
 327 typedef struct
 328 {
 329   Elf32_Addr    r_offset;               /* Address */
 330   Elf32_Word    r_info;                 /* Relocation type and symbol index */
 331   Elf32_Sword   r_addend;               /* Addend */
 332 } Elf32_Rela;
 333
 334 typedef struct
 335 {
 336   Elf64_Addr    r_offset;               /* Address */
 337   Elf64_Xword   r_info;                 /* Relocation type and symbol index */
 338   Elf64_Sxword  r_addend;               /* Addend */
 339 } Elf64_Rela;
 340
 341 /* How to extract and insert information held in the r_info field.  */
 342
 343 #define ELF32_R_SYM(val)                ((val) >> 8)
 344 #define ELF32_R_TYPE(val)               ((val) & 0xff)
 345 #define ELF32_R_INFO(sym, type)         (((sym) << 8) + ((type) & 0xff))
 346
 347 #define ELF64_R_SYM(i)                  ((i) >> 32)
 348 #define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
 349 #define ELF64_R_INFO(sym,type)          (((sym) << 32) + (type))
 350
 351 /* Program segment header.  */
 352
 353 typedef struct
 354 {
 355   Elf32_Word    p_type;                 /* Segment type */
 356   Elf32_Off     p_offset;               /* Segment file offset */
 357   Elf32_Addr    p_vaddr;                /* Segment virtual address */
 358   Elf32_Addr    p_paddr;                /* Segment physical address */
 359   Elf32_Word    p_filesz;               /* Segment size in file */
 360   Elf32_Word    p_memsz;                /* Segment size in memory */
 361   Elf32_Word    p_flags;                /* Segment flags */
 362   Elf32_Word    p_align;                /* Segment alignment */
 363 } Elf32_Phdr;
 364
 365 typedef struct
 366 {
 367   Elf64_Word    p_type;                 /* Segment type */
 368   Elf64_Word    p_flags;                /* Segment flags */
 369   Elf64_Off     p_offset;               /* Segment file offset */
 370   Elf64_Addr    p_vaddr;                /* Segment virtual address */
 371   Elf64_Addr    p_paddr;                /* Segment physical address */
 372   Elf64_Xword   p_filesz;               /* Segment size in file */
 373   Elf64_Xword   p_memsz;                /* Segment size in memory */
 374   Elf64_Xword   p_align;                /* Segment alignment */
 375 } Elf64_Phdr;
 376
 377 /* Legal values for p_type (segment type).  */
 378
 379 #define PT_NULL         0               /* Program header table entry unused */
 380 #define PT_LOAD         1               /* Loadable program segment */
 381 #define PT_DYNAMIC      2               /* Dynamic linking information */
 382 #define PT_INTERP       3               /* Program interpreter */
 383 #define PT_NOTE         4               /* Auxiliary information */
 384 #define PT_SHLIB        5               /* Reserved */
 385 #define PT_PHDR         6               /* Entry for header table itself */
 386 #define PT_NUM          7               /* Number of defined types.  */
 387 #define PT_LOPROC       0x70000000      /* Start of processor-specific */
 388 #define PT_HIPROC       0x7fffffff      /* End of processor-specific */
 389
 390 /* Legal values for p_flags (segment flags).  */
 391
 392 #define PF_X            (1 << 0)        /* Segment is executable */
 393 #define PF_W            (1 << 1)        /* Segment is writable */
 394 #define PF_R            (1 << 2)        /* Segment is readable */
 395 #define PF_MASKPROC     0xf0000000      /* Processor-specific */
 396
 397 /* Legal values for note segment descriptor types for core files. */
 398
 399 #define NT_PRSTATUS     1               /* Contains copy of prstatus struct */
 400 #define NT_FPREGSET     2               /* Contains copy of fpregset struct */
 401 #define NT_PRPSINFO     3               /* Contains copy of prpsinfo struct */
 402
 403 /* Legal values for the  note segment descriptor types for object files.  */
 404
 405 #define NT_VERSION      1               /* Contains a version string.  */
 406
 407
 408 /* Dynamic section entry.  */
 409
 410 typedef struct
 411 {
 412   Elf32_Sword   d_tag;                  /* Dynamic entry type */
 413   union
 414     {
 415       Elf32_Word d_val;                 /* Integer value */
 416       Elf32_Addr d_ptr;                 /* Address value */
 417     } d_un;
 418 } Elf32_Dyn;
 419
 420 typedef struct
 421 {
 422   Elf64_Sxword  d_tag;                  /* Dynamic entry type */
 423   union
 424     {
 425       Elf64_Xword d_val;                /* Integer value */
 426       Elf64_Addr d_ptr;                 /* Address value */
 427     } d_un;
 428 } Elf64_Dyn;
 429
 430 /* Legal values for d_tag (dynamic entry type).  */
 431
 432 #define DT_NULL         0               /* Marks end of dynamic section */
 433 #define DT_NEEDED       1               /* Name of needed library */
 434 #define DT_PLTRELSZ     2               /* Size in bytes of PLT relocs */
 435 #define DT_PLTGOT       3               /* Processor defined value */
 436 #define DT_HASH         4               /* Address of symbol hash table */
 437 #define DT_STRTAB       5               /* Address of string table */
 438 #define DT_SYMTAB       6               /* Address of symbol table */
 439 #define DT_RELA         7               /* Address of Rela relocs */
 440 #define DT_RELASZ       8               /* Total size of Rela relocs */
 441 #define DT_RELAENT      9               /* Size of one Rela reloc */
 442 #define DT_STRSZ        10              /* Size of string table */
 443 #define DT_SYMENT       11              /* Size of one symbol table entry */
 444 #define DT_INIT         12              /* Address of init function */
 445 #define DT_FINI         13              /* Address of termination function */
 446 #define DT_SONAME       14              /* Name of shared object */
 447 #define DT_RPATH        15              /* Library search path */
 448 #define DT_SYMBOLIC     16              /* Start symbol search here */
 449 #define DT_REL          17              /* Address of Rel relocs */
 450 #define DT_RELSZ        18              /* Total size of Rel relocs */
 451 #define DT_RELENT       19              /* Size of one Rel reloc */
 452 #define DT_PLTREL       20              /* Type of reloc in PLT */
 453 #define DT_DEBUG        21              /* For debugging; unspecified */
 454 #define DT_TEXTREL      22              /* Reloc might modify .text */
 455 #define DT_JMPREL       23              /* Address of PLT relocs */
 456 #define DT_NUM          24              /* Number used */
 457 #define DT_LOPROC       0x70000000      /* Start of processor-specific */
 458 #define DT_HIPROC       0x7fffffff      /* End of processor-specific */
 459 #define DT_PROCNUM      DT_MIPS_NUM     /* Most used by any processor */
 460
 461 /* Auxiliary vector.  */
 462
 463 /* This vector is normally only used by the program interpreter.  The
 464    usual definition in an ABI supplement uses the name auxv_t.  The
 465    vector is not usually defined in a standard <elf.h> file, but it
 466    can't hurt.  We rename it to avoid conflicts.  The sizes of these
 467    types are an arrangement between the exec server and the program
 468    interpreter, so we don't fully specify them here.  */
 469
 470 typedef struct
 471 {
 472   int a_type;                   /* Entry type */
 473   union
 474     {
 475       long int a_val;           /* Integer value */
 476       void *a_ptr;              /* Pointer value */
 477       void (*a_fcn) (void);     /* Function pointer value */
 478     } a_un;
 479 } Elf32_auxv_t;
 480
 481 typedef struct
 482 {
 483   long int a_type;              /* Entry type */
 484   union
 485     {
 486       long int a_val;           /* Integer value */
 487       void *a_ptr;              /* Pointer value */
 488       void (*a_fcn) (void);     /* Function pointer value */
 489     } a_un;
 490 } Elf64_auxv_t;
 491
 492 /* Legal values for a_type (entry type).  */
 493
 494 #define AT_NULL         0               /* End of vector */
 495 #define AT_IGNORE       1               /* Entry should be ignored */
 496 #define AT_EXECFD       2               /* File descriptor of program */
 497 #define AT_PHDR         3               /* Program headers for program */
 498 #define AT_PHENT        4               /* Size of program header entry */
 499 #define AT_PHNUM        5               /* Number of program headers */
 500 #define AT_PAGESZ       6               /* System page size */
 501 #define AT_BASE         7               /* Base address of interpreter */
 502 #define AT_FLAGS        8               /* Flags */
 503 #define AT_ENTRY        9               /* Entry point of program */
 504 #define AT_NOTELF       10              /* Program is not ELF */
 505 #define AT_UID          11              /* Real uid */
 506 #define AT_EUID         12              /* Effective uid */
 507 #define AT_GID          13              /* Real gid */
 508 #define AT_EGID         14              /* Effective gid */
 509
 510 /* Motorola 68k specific definitions.  */
 511
 512 /* m68k relocs.  */
 513
 514 #define R_68K_NONE      0               /* No reloc */
 515 #define R_68K_32        1               /* Direct 32 bit  */
 516 #define R_68K_16        2               /* Direct 16 bit  */
 517 #define R_68K_8         3               /* Direct 8 bit  */
 518 #define R_68K_PC32      4               /* PC relative 32 bit */
 519 #define R_68K_PC16      5               /* PC relative 16 bit */
 520 #define R_68K_PC8       6               /* PC relative 8 bit */
 521 #define R_68K_GOT32     7               /* 32 bit PC relative GOT entry */
 522 #define R_68K_GOT16     8               /* 16 bit PC relative GOT entry */
 523 #define R_68K_GOT8      9               /* 8 bit PC relative GOT entry */
 524 #define R_68K_GOT32O    10              /* 32 bit GOT offset */
 525 #define R_68K_GOT16O    11              /* 16 bit GOT offset */
 526 #define R_68K_GOT8O     12              /* 8 bit GOT offset */
 527 #define R_68K_PLT32     13              /* 32 bit PC relative PLT address */
 528 #define R_68K_PLT16     14              /* 16 bit PC relative PLT address */
 529 #define R_68K_PLT8      15              /* 8 bit PC relative PLT address */
 530 #define R_68K_PLT32O    16              /* 32 bit PLT offset */
 531 #define R_68K_PLT16O    17              /* 16 bit PLT offset */
 532 #define R_68K_PLT8O     18              /* 8 bit PLT offset */
 533 #define R_68K_COPY      19              /* Copy symbol at runtime */
 534 #define R_68K_GLOB_DAT  20              /* Create GOT entry */
 535 #define R_68K_JMP_SLOT  21              /* Create PLT entry */
 536 #define R_68K_RELATIVE  22              /* Adjust by program base */
 537
 538 /* Intel 80386 specific definitions.  */
 539
 540 /* i386 relocs.  */
 541
 542 #define R_386_NONE      0               /* No reloc */
 543 #define R_386_32        1               /* Direct 32 bit  */
 544 #define R_386_PC32      2               /* PC relative 32 bit */
 545 #define R_386_GOT32     3               /* 32 bit GOT entry */
 546 #define R_386_PLT32     4               /* 32 bit PLT address */
 547 #define R_386_COPY      5               /* Copy symbol at runtime */
 548 #define R_386_GLOB_DAT  6               /* Create GOT entry */
 549 #define R_386_JMP_SLOT  7               /* Create PLT entry */
 550 #define R_386_RELATIVE  8               /* Adjust by program base */
 551 #define R_386_GOTOFF    9               /* 32 bit offset to GOT */
 552 #define R_386_GOTPC     10              /* 32 bit PC relative offset to GOT */
 553
 554 /* SUN SPARC specific definitions.  */
 555
 556 /* SPARC relocs.  */
 557
 558 #define R_SPARC_NONE    0               /* No reloc */
 559 #define R_SPARC_8       1               /* Direct 8 bit */
 560 #define R_SPARC_16      2               /* Direct 16 bit */
 561 #define R_SPARC_32      3               /* Direct 32 bit */
 562 #define R_SPARC_DISP8   4               /* PC relative 8 bit */
 563 #define R_SPARC_DISP16  5               /* PC relative 16 bit */
 564 #define R_SPARC_DISP32  6               /* PC relative 32 bit */
 565 #define R_SPARC_WDISP30 7               /* PC relative 30 bit shifted */
 566 #define R_SPARC_WDISP22 8               /* PC relative 22 bit shifted */
 567 #define R_SPARC_HI22    9               /* High 22 bit */
 568 #define R_SPARC_22      10              /* Direct 22 bit */
 569 #define R_SPARC_13      11              /* Direct 13 bit */
 570 #define R_SPARC_LO10    12              /* Truncated 10 bit */
 571 #define R_SPARC_GOT10   13              /* Truncated 10 bit GOT entry */
 572 #define R_SPARC_GOT13   14              /* 13 bit GOT entry */
 573 #define R_SPARC_GOT22   15              /* 22 bit GOT entry shifted */
 574 #define R_SPARC_PC10    16              /* PC relative 10 bit truncated */
 575 #define R_SPARC_PC22    17              /* PC relative 22 bit shifted */
 576 #define R_SPARC_WPLT30  18              /* 30 bit PC relative PLT address */
 577 #define R_SPARC_COPY    19              /* Copy symbol at runtime */
 578 #define R_SPARC_GLOB_DAT 20             /* Create GOT entry */
 579 #define R_SPARC_JMP_SLOT 21             /* Create PLT entry */
 580 #define R_SPARC_RELATIVE 22             /* Adjust by program base */
 581 #define R_SPARC_UA32    23              /* Direct 32 bit unaligned */
 582
 583 /* MIPS R3000 specific definitions.  */
 584
 585 /* Legal values for e_flags field of Elf32_Ehdr.  */
 586
 587 #define EF_MIPS_NOREORDER 1             /* A .noreorder directive was used */
 588 #define EF_MIPS_PIC       2             /* Contains PIC code */
 589 #define EF_MIPS_CPIC      4             /* Uses PIC calling sequence */
 590 #define EF_MIPS_ARCH      0xf0000000    /* MIPS architecture level */
 591
 592 /* Legal values for MIPS architecture level.  */
 593
 594 #define E_MIPS_ARCH_1     0x00000000    /* -mips1 code.  */
 595 #define E_MIPS_ARCH_2     0x10000000    /* -mips2 code.  */
 596 #define E_MIPS_ARCH_3     0x20000000    /* -mips3 code.  */
 597
 598 /* Special section indices.  */
 599
 600 #define SHN_MIPS_ACOMMON 0xff00         /* Allocated common symbols */
 601 #define SHN_MIPS_TEXT    0xff01         /* Allocated test symbols.  */
 602 #define SHN_MIPS_DATA    0xff02         /* Allocated data symbols.  */
 603 #define SHN_MIPS_SCOMMON 0xff03         /* Small common symbols */
 604 #define SHN_MIPS_SUNDEFINED 0xff04      /* Small undefined symbols */
 605
 606 /* Legal values for sh_type field of Elf32_Shdr.  */
 607
 608 #define SHT_MIPS_LIBLIST  0x70000000    /* Shared objects used in link */
 609 #define SHT_MIPS_CONFLICT 0x70000002    /* Conflicting symbols */
 610 #define SHT_MIPS_GPTAB    0x70000003    /* Global data area sizes */
 611 #define SHT_MIPS_UCODE    0x70000004    /* Reserved for SGI/MIPS compilers */
 612 #define SHT_MIPS_DEBUG    0x70000005    /* MIPS ECOFF debugging information */
 613 #define SHT_MIPS_REGINFO  0x70000006    /* Register usage information */
 614 #define SHT_MIPS_OPTIONS  0x7000000d    /* Miscellaneous options.  */
 615 #define SHT_MIPS_DWARF    0x7000001e    /* DWARF debugging information.  */
 616 #define SHT_MIPS_EVENTS   0x70000021    /* Event section.  */
 617
 618 /* Legal values for sh_flags field of Elf32_Shdr.  */
 619
 620 #define SHF_MIPS_GPREL  0x10000000      /* Must be part of global data area */
 621
 622 /* Entries found in sections of type SHT_MIPS_GPTAB.  */
 623
 624 typedef union
 625 {
 626   struct
 627     {
 628       Elf32_Word gt_current_g_value;    /* -G value used for compilation */
 629       Elf32_Word gt_unused;             /* Not used */
 630     } gt_header;                        /* First entry in section */
 631   struct
 632     {
 633       Elf32_Word gt_g_value;            /* If this value were used for -G */
 634       Elf32_Word gt_bytes;              /* This many bytes would be used */
 635     } gt_entry;                         /* Subsequent entries in section */
 636 } Elf32_gptab;
 637
 638 /* Entry found in sections of type SHT_MIPS_REGINFO.  */
 639
 640 typedef struct
 641 {
 642   Elf32_Word    ri_gprmask;             /* General registers used */
 643   Elf32_Word    ri_cprmask[4];          /* Coprocessor registers used */
 644   Elf32_Sword   ri_gp_value;            /* $gp register value */
 645 } Elf32_RegInfo;
 646
 647 /* MIPS relocs.  */
 648
 649 #define R_MIPS_NONE     0               /* No reloc */
 650 #define R_MIPS_16       1               /* Direct 16 bit */
 651 #define R_MIPS_32       2               /* Direct 32 bit */
 652 #define R_MIPS_REL32    3               /* PC relative 32 bit */
 653 #define R_MIPS_26       4               /* Direct 26 bit shifted */
 654 #define R_MIPS_HI16     5               /* High 16 bit */
 655 #define R_MIPS_LO16     6               /* Low 16 bit */
 656 #define R_MIPS_GPREL16  7               /* GP relative 16 bit */
 657 #define R_MIPS_LITERAL  8               /* 16 bit literal entry */
 658 #define R_MIPS_GOT16    9               /* 16 bit GOT entry */
 659 #define R_MIPS_PC16     10              /* PC relative 16 bit */
 660 #define R_MIPS_CALL16   11              /* 16 bit GOT entry for function */
 661 #define R_MIPS_GPREL32  12              /* GP relative 32 bit */
 662
 663 /* Legal values for p_type field of Elf32_Phdr.  */
 664
 665 #define PT_MIPS_REGINFO 0x70000000      /* Register usage information */
 666
 667 /* Legal values for d_tag field of Elf32_Dyn.  */
 668
 669 #define DT_MIPS_RLD_VERSION  0x70000001 /* Runtime linker interface version */
 670 #define DT_MIPS_TIME_STAMP   0x70000002 /* Timestamp */
 671 #define DT_MIPS_ICHECKSUM    0x70000003 /* Checksum */
 672 #define DT_MIPS_IVERSION     0x70000004 /* Version string (string tbl index) */
 673 #define DT_MIPS_FLAGS        0x70000005 /* Flags */
 674 #define DT_MIPS_BASE_ADDRESS 0x70000006 /* Base address */
 675 #define DT_MIPS_CONFLICT     0x70000008 /* Address of CONFLICT section */
 676 #define DT_MIPS_LIBLIST      0x70000009 /* Address of LIBLIST section */
 677 #define DT_MIPS_LOCAL_GOTNO  0x7000000a /* Number of local GOT entries */
 678 #define DT_MIPS_CONFLICTNO   0x7000000b /* Number of CONFLICT entries */
 679 #define DT_MIPS_LIBLISTNO    0x70000010 /* Number of LIBLIST entries */
 680 #define DT_MIPS_SYMTABNO     0x70000011 /* Number of DYNSYM entries */
 681 #define DT_MIPS_UNREFEXTNO   0x70000012 /* First external DYNSYM */
 682 #define DT_MIPS_GOTSYM       0x70000013 /* First GOT entry in DYNSYM */
 683 #define DT_MIPS_HIPAGENO     0x70000014 /* Number of GOT page table entries */
 684 #define DT_MIPS_RLD_MAP      0x70000016 /* Address of run time loader map.  */
 685 #define DT_MIPS_NUM          0x17
 686
 687 /* Legal values for DT_MIPS_FLAG Elf32_Dyn entry.  */
 688
 689 #define RHF_NONE                   0            /* No flags */
 690 #define RHF_QUICKSTART             (1 << 0)     /* Use quickstart */
 691 #define RHF_NOTPOT                 (1 << 1)     /* Hash size not power of 2 */
 692 #define RHF_NO_LIBRARY_REPLACEMENT (1 << 2)     /* Ignore LD_LIBRARY_PATH */
 693
 694 /* Entries found in sections of type SHT_MIPS_LIBLIST.  */
 695
 696 typedef struct
 697 {
 698   Elf32_Word    l_name;                 /* Name (string table index) */
 699   Elf32_Word    l_time_stamp;           /* Timestamp */
 700   Elf32_Word    l_checksum;             /* Checksum */
 701   Elf32_Word    l_version;              /* Interface version */
 702   Elf32_Word    l_flags;                /* Flags */
 703 } Elf32_Lib;
 704
 705 /* Legal values for l_flags.  */
 706
 707 #define LL_EXACT_MATCH    (1 << 0)      /* Require exact match */
 708 #define LL_IGNORE_INT_VER (1 << 1)      /* Ignore interface version */
 709
 710 /* Entries found in sections of type SHT_MIPS_CONFLICT.  */
 711
 712 typedef Elf32_Addr Elf32_Conflict;
 713
 714
 715 /* HPPA specific definitions.  */
 716
 717 /* Legal values for sh_type field of Elf32_Shdr.  */
 718
 719 #define SHT_PARISC_GOT          0x70000000 /* GOT for external data.  */
 720 #define SHT_PARISC_ARCH         0x70000001 /* Architecture extensions.  */
 721 #define SHT_PARISC_GLOBAL       0x70000002 /* Definition of $global$.  */
 722 #define SHT_PARISC_MILLI        0x70000003 /* Millicode routines.  */
 723 #define SHT_PARISC_UNWIND       0x70000004 /* Unwind information.  */
 724 #define SHT_PARISC_PLT          0x70000005 /* Procedure linkage table.  */
 725 #define SHT_PARISC_SDATA        0x70000006 /* Short initialized data.  */
 726 #define SHT_PARISC_SBSS         0x70000007 /* Short uninitialized data.  */
 727 #define SHT_PARISC_SYMEXTN      0x70000008 /* Argument/relocation info.  */
 728 #define SHT_PARISC_STUBS        0x70000009 /* Linker stubs.  */
 729
 730 /* Legal values for sh_flags field of Elf32_Shdr.  */
 731
 732 #define SHF_PARISC_SHORT        0x20000000 /* Section with short addressing. */
 733
 734 /* Legal values for ST_TYPE subfield of st_info (symbol type).  */
 735
 736 #define STT_PARISC_MILLICODE    13      /* Millicode function entry point.  */
 737
 738
 739 /* Alpha specific declarations.  */
 740
 741 /* Alpha relocs.  */
 742
 743 #define R_ALPHA_NONE            0       /* No reloc */
 744 #define R_ALPHA_REFLONG         1       /* Direct 32 bit */
 745 #define R_ALPHA_REFQUAD         2       /* Direct 64 bit */
 746 #define R_ALPHA_GPREL32         3       /* GP relative 32 bit */
 747 #define R_ALPHA_LITERAL         4       /* GP relative 16 bit w/optimization */
 748 #define R_ALPHA_LITUSE          5       /* Optimization hint for LITERAL */
 749 #define R_ALPHA_GPDISP          6       /* Add displacement to GP */
 750 #define R_ALPHA_BRADDR          7       /* PC+4 relative 23 bit shifted */
 751 #define R_ALPHA_HINT            8       /* PC+4 relative 16 bit shifted */
 752 #define R_ALPHA_SREL16          9       /* PC relative 16 bit */
 753 #define R_ALPHA_SREL32          10      /* PC relative 32 bit */
 754 #define R_ALPHA_SREL64          11      /* PC relative 64 bit */
 755 #define R_ALPHA_OP_PUSH         12      /* OP stack push */
 756 #define R_ALPHA_OP_STORE        13      /* OP stack pop and store */
 757 #define R_ALPHA_OP_PSUB         14      /* OP stack subtract */
 758 #define R_ALPHA_OP_PRSHIFT      15      /* OP stack right shift */
 759 #define R_ALPHA_GPVALUE         16
 760 #define R_ALPHA_GPRELHIGH       17
 761 #define R_ALPHA_GPRELLOW        18
 762 #define R_ALPHA_IMMED_GP_16     19
 763 #define R_ALPHA_IMMED_GP_HI32   20
 764 #define R_ALPHA_IMMED_SCN_HI32  21
 765 #define R_ALPHA_IMMED_BR_HI32   22
 766 #define R_ALPHA_IMMED_LO32      23
 767 #define R_ALPHA_COPY            24      /* Copy symbol at runtime */
 768 #define R_ALPHA_GLOB_DAT        25      /* Create GOT entry */
 769 #define R_ALPHA_JMP_SLOT        26      /* Create PLT entry */
 770 #define R_ALPHA_RELATIVE        27      /* Adjust by program base */
 771
 772
 773 #endif  /* elf.h */