elf/elf.h

   1 /* This file defines standard ELF types, structures, and macros.
   2    Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ian Lance Taylor <ian@cygnus.com>.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef _ELF_H
  22
  23 #define _ELF_H 1
  24 #include <sys/cdefs.h>
  25
  26 __BEGIN_DECLS
  27
  28 /* Standard ELF types.  Using __attribute__ mode ensures that GCC
  29    will choose the right number of bits for these types.  */
  30
  31 /* Type for a 16-bit quantity.  */
  32 typedef unsigned int Elf32_Half    __attribute__ ((mode (HI)));
  33 typedef unsigned int Elf64_Half    __attribute__ ((mode (HI)));
  34
  35 /* Types for signed and unsigned 32-bit quantities.  */
  36 typedef unsigned int Elf32_Word    __attribute__ ((mode (SI)));
  37 typedef          int Elf32_Sword   __attribute__ ((mode (SI)));
  38 typedef unsigned int Elf64_Word    __attribute__ ((mode (SI)));
  39 typedef          int Elf64_Sword   __attribute__ ((mode (SI)));
  40
  41 /* Types for signed and unsigned 64-bit quantities.  */
  42 typedef unsigned int Elf32_Xword   __attribute__ ((mode (DI)));
  43 typedef          int Elf32_Sxword  __attribute__ ((mode (DI)));
  44 typedef unsigned int Elf64_Xword   __attribute__ ((mode (DI)));
  45 typedef          int Elf64_Sxword  __attribute__ ((mode (DI)));
  46
  47 /* Type of addresses.  */
  48 typedef unsigned int Elf32_Addr    __attribute__ ((mode (SI)));
  49 typedef unsigned int Elf64_Addr    __attribute__ ((mode (DI)));
  50
  51 /* Type of file offsets.  */
  52 typedef unsigned int Elf32_Off     __attribute__ ((mode (SI)));
  53 typedef unsigned int Elf64_Off     __attribute__ ((mode (DI)));
  54
  55 /* Type for section indices, which are 16-bit quantities.  */
  56 typedef unsigned int Elf32_Section __attribute__ ((mode (HI)));
  57 typedef unsigned int Elf64_Section __attribute__ ((mode (HI)));
  58
  59 /* Type of symbol indices.  */
  60 typedef unsigned int Elf32_Symndx  __attribute__ ((mode (SI)));
  61 typedef unsigned int Elf64_Symndx  __attribute__ ((mode (DI)));
  62
  63
  64 /* The ELF file header.  This appears at the start of every ELF file.  */
  65
  66 #define EI_NIDENT (16)
  67
  68 typedef struct
  69 {
  70   unsigned char e_ident[EI_NIDENT];     /* Magic number and other info */
  71   Elf32_Half    e_type;                 /* Object file type */
  72   Elf32_Half    e_machine;              /* Architecture */
  73   Elf32_Word    e_version;              /* Object file version */
  74   Elf32_Addr    e_entry;                /* Entry point virtual address */
  75   Elf32_Off     e_phoff;                /* Program header table file offset */
  76   Elf32_Off     e_shoff;                /* Section header table file offset */
  77   Elf32_Word    e_flags;                /* Processor-specific flags */
  78   Elf32_Half    e_ehsize;               /* ELF header size in bytes */
  79   Elf32_Half    e_phentsize;            /* Program header table entry size */
  80   Elf32_Half    e_phnum;                /* Program header table entry count */
  81   Elf32_Half    e_shentsize;            /* Section header table entry size */
  82   Elf32_Half    e_shnum;                /* Section header table entry count */
  83   Elf32_Half    e_shstrndx;             /* Section header string table index */
  84 } Elf32_Ehdr;
  85
  86 typedef struct
  87 {
  88   unsigned char e_ident[EI_NIDENT];     /* Magic number and other info */
  89   Elf64_Half    e_type;                 /* Object file type */
  90   Elf64_Half    e_machine;              /* Architecture */
  91   Elf64_Word    e_version;              /* Object file version */
  92   Elf64_Addr    e_entry;                /* Entry point virtual address */
  93   Elf64_Off     e_phoff;                /* Program header table file offset */
  94   Elf64_Off     e_shoff;                /* Section header table file offset */
  95   Elf64_Word    e_flags;                /* Processor-specific flags */
  96   Elf64_Half    e_ehsize;               /* ELF header size in bytes */
  97   Elf64_Half    e_phentsize;            /* Program header table entry size */
  98   Elf64_Half    e_phnum;                /* Program header table entry count */
  99   Elf64_Half    e_shentsize;            /* Section header table entry size */
 100   Elf64_Half    e_shnum;                /* Section header table entry count */
 101   Elf64_Half    e_shstrndx;             /* Section header string table index */
 102 } Elf64_Ehdr;
 103
 104 /* Fields in the e_ident array.  The EI_* macros are indices into the
 105    array.  The macros under each EI_* macro are the values the byte
 106    may have.  */
 107
 108 #define EI_MAG0         0               /* File identification byte 0 index */
 109 #define ELFMAG0         0x7f            /* Magic number byte 0 */
 110
 111 #define EI_MAG1         1               /* File identification byte 1 index */
 112 #define ELFMAG1         'E'             /* Magic number byte 1 */
 113
 114 #define EI_MAG2         2               /* File identification byte 2 index */
 115 #define ELFMAG2         'L'             /* Magic number byte 2 */
 116
 117 #define EI_MAG3         3               /* File identification byte 3 index */
 118 #define ELFMAG3         'F'             /* Magic number byte 3 */
 119
 120 /* Conglomeration of the identification bytes, for easy testing as a word.  */
 121 #define ELFMAG          "\177ELF"
 122 #define SELFMAG         4
 123
 124 #define EI_CLASS        4               /* File class byte index */
 125 #define ELFCLASSNONE    0               /* Invalid class */
 126 #define ELFCLASS32      1               /* 32-bit objects */
 127 #define ELFCLASS64      2               /* 64-bit objects */
 128
 129 #define EI_DATA         5               /* Data encoding byte index */
 130 #define ELFDATANONE     0               /* Invalid data encoding */
 131 #define ELFDATA2LSB     1               /* 2's complement, little endian */
 132 #define ELFDATA2MSB     2               /* 2's complement, big endian */
 133
 134 #define EI_VERSION      6               /* File version byte index */
 135                                         /* Value must be EV_CURRENT */
 136
 137 #define EI_PAD          7               /* Byte index of padding bytes */
 138
 139 /* Legal values for e_type (object file type).  */
 140
 141 #define ET_NONE         0               /* No file type */
 142 #define ET_REL          1               /* Relocatable file */
 143 #define ET_EXEC         2               /* Executable file */
 144 #define ET_DYN          3               /* Shared object file */
 145 #define ET_CORE         4               /* Core file */
 146 #define ET_NUM          5               /* Number of defined types.  */
 147 #define ET_LOPROC       0xff00          /* Processor-specific */
 148 #define ET_HIPROC       0xffff          /* Processor-specific */
 149
 150 /* Legal values for e_machine (architecture).  */
 151
 152 #define EM_NONE         0               /* No machine */
 153 #define EM_M32          1               /* AT&T WE 32100 */
 154 #define EM_SPARC        2               /* SUN SPARC */
 155 #define EM_386          3               /* Intel 80386 */
 156 #define EM_68K          4               /* Motorola m68k family */
 157 #define EM_88K          5               /* Motorola m88k family */
 158 #define EM_486          6               /* Intel 80486 */
 159 #define EM_860          7               /* Intel 80860 */
 160 #define EM_MIPS         8               /* MIPS R3000 big-endian */
 161 #define EM_S370         9               /* Amdahl */
 162 #define EM_MIPS_RS4_BE 10               /* MIPS R4000 big-endian */
 163
 164 #define EM_SPARC64     11               /* SPARC v9 (not official) 64-bit */
 165
 166 #define EM_PARISC      15               /* HPPA */
 167 #define EM_PPC         20               /* PowerPC */
 168
 169 /* If it is necessary to assign new unofficial EM_* values, please
 170    pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
 171    chances of collision with official or non-GNU unofficial values.  */
 172
 173 #define EM_ALPHA        0x9026
 174
 175 /* Legal values for e_version (version).  */
 176
 177 #define EV_NONE         0               /* Invalid ELF version */
 178 #define EV_CURRENT      1               /* Current version */
 179
 180 /* Section header.  */
 181
 182 typedef struct
 183 {
 184   Elf32_Word    sh_name;                /* Section name (string tbl index) */
 185   Elf32_Word    sh_type;                /* Section type */
 186   Elf32_Word    sh_flags;               /* Section flags */
 187   Elf32_Addr    sh_addr;                /* Section virtual addr at execution */
 188   Elf32_Off     sh_offset;              /* Section file offset */
 189   Elf32_Word    sh_size;                /* Section size in bytes */
 190   Elf32_Word    sh_link;                /* Link to another section */
 191   Elf32_Word    sh_info;                /* Additional section information */
 192   Elf32_Word    sh_addralign;           /* Section alignment */
 193   Elf32_Word    sh_entsize;             /* Entry size if section holds table */
 194 } Elf32_Shdr;
 195
 196 typedef struct
 197 {
 198   Elf64_Word    sh_name;                /* Section name (string tbl index) */
 199   Elf64_Word    sh_type;                /* Section type */
 200   Elf64_Xword   sh_flags;               /* Section flags */
 201   Elf64_Addr    sh_addr;                /* Section virtual addr at execution */
 202   Elf64_Off     sh_offset;              /* Section file offset */
 203   Elf64_Xword   sh_size;                /* Section size in bytes */
 204   Elf64_Word    sh_link;                /* Link to another section */
 205   Elf64_Word    sh_info;                /* Additional section information */
 206   Elf64_Xword   sh_addralign;           /* Section alignment */
 207   Elf64_Xword   sh_entsize;             /* Entry size if section holds table */
 208 } Elf64_Shdr;
 209
 210 /* Special section indices.  */
 211
 212 #define SHN_UNDEF       0               /* Undefined section */
 213 #define SHN_LORESERVE   0xff00          /* Start of reserved indices */
 214 #define SHN_LOPROC      0xff00          /* Start of processor-specific */
 215 #define SHN_HIPROC      0xff1f          /* End of processor-specific */
 216 #define SHN_ABS         0xfff1          /* Associated symbol is absolute */
 217 #define SHN_COMMON      0xfff2          /* Associated symbol is common */
 218 #define SHN_HIRESERVE   0xffff          /* End of reserved indices */
 219
 220 /* Legal values for sh_type (section type).  */
 221
 222 #define SHT_NULL        0               /* Section header table entry unused */
 223 #define SHT_PROGBITS    1               /* Program data */
 224 #define SHT_SYMTAB      2               /* Symbol table */
 225 #define SHT_STRTAB      3               /* String table */
 226 #define SHT_RELA        4               /* Relocation entries with addends */
 227 #define SHT_HASH        5               /* Symbol hash table */
 228 #define SHT_DYNAMIC     6               /* Dynamic linking information */
 229 #define SHT_NOTE        7               /* Notes */
 230 #define SHT_NOBITS      8               /* Program space with no data (bss) */
 231 #define SHT_REL         9               /* Relocation entries, no addends */
 232 #define SHT_SHLIB       10              /* Reserved */
 233 #define SHT_DYNSYM      11              /* Dynamic linker symbol table */
 234 #define SHT_NUM         12              /* Number of defined types.  */
 235 #define SHT_LOSUNW      0x6ffffffd      /* Sun-specific low bound.  */
 236 #define SHT_GNU_verdef  0x6ffffffd      /* Version definition section.  */
 237 #define SHT_GNU_verneed 0x6ffffffe      /* Version needs section.  */
 238 #define SHT_GNU_versym  0x6fffffff      /* Version symbol table.  */
 239 #define SHT_HISUNW      0x6fffffff      /* Sun-specific high bound.  */
 240 #define SHT_LOPROC      0x70000000      /* Start of processor-specific */
 241 #define SHT_HIPROC      0x7fffffff      /* End of processor-specific */
 242 #define SHT_LOUSER      0x80000000      /* Start of application-specific */
 243 #define SHT_HIUSER      0x8fffffff      /* End of application-specific */
 244
 245 /* Legal values for sh_flags (section flags).  */
 246
 247 #define SHF_WRITE       (1 << 0)        /* Writable */
 248 #define SHF_ALLOC       (1 << 1)        /* Occupies memory during execution */
 249 #define SHF_EXECINSTR   (1 << 2)        /* Executable */
 250 #define SHF_MASKPROC    0xf0000000      /* Processor-specific */
 251
 252 /* Symbol table entry.  */
 253
 254 typedef struct
 255 {
 256   Elf32_Word    st_name;                /* Symbol name (string tbl index) */
 257   Elf32_Addr    st_value;               /* Symbol value */
 258   Elf32_Word    st_size;                /* Symbol size */
 259   unsigned char st_info;                /* Symbol type and binding */
 260   unsigned char st_other;               /* No defined meaning, 0 */
 261   Elf32_Section st_shndx;               /* Section index */
 262 } Elf32_Sym;
 263
 264 typedef struct
 265 {
 266   Elf64_Word    st_name;                /* Symbol name (string tbl index) */
 267   unsigned char st_info;                /* Symbol type and binding */
 268   unsigned char st_other;               /* No defined meaning, 0 */
 269   Elf64_Section st_shndx;               /* Section index */
 270   Elf64_Addr    st_value;               /* Symbol value */
 271   Elf64_Xword   st_size;                /* Symbol size */
 272 } Elf64_Sym;
 273
 274 /* Special section index.  */
 275
 276 #define SHN_UNDEF       0               /* No section, undefined symbol.  */
 277
 278 /* How to extract and insert information held in the st_info field.  */
 279
 280 #define ELF32_ST_BIND(val)              (((unsigned char) (val)) >> 4)
 281 #define ELF32_ST_TYPE(val)              ((val) & 0xf)
 282 #define ELF32_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))
 283
 284 /* Both Elf32_Sym and Elf64_Sym use the same one-byte st_info field.  */
 285 #define ELF64_ST_BIND(val)              ELF32_ST_BIND (val)
 286 #define ELF64_ST_TYPE(val)              ELF32_ST_TYPE (val)
 287 #define ELF64_ST_INFO(bind, type)       ELF32_ST_INFO ((bind), (type))
 288
 289 /* Legal values for ST_BIND subfield of st_info (symbol binding).  */
 290
 291 #define STB_LOCAL       0               /* Local symbol */
 292 #define STB_GLOBAL      1               /* Global symbol */
 293 #define STB_WEAK        2               /* Weak symbol */
 294 #define STB_NUM         3               /* Number of defined types.  */
 295 #define STB_LOPROC      13              /* Start of processor-specific */
 296 #define STB_HIPROC      15              /* End of processor-specific */
 297
 298 /* Legal values for ST_TYPE subfield of st_info (symbol type).  */
 299
 300 #define STT_NOTYPE      0               /* Symbol type is unspecified */
 301 #define STT_OBJECT      1               /* Symbol is a data object */
 302 #define STT_FUNC        2               /* Symbol is a code object */
 303 #define STT_SECTION     3               /* Symbol associated with a section */
 304 #define STT_FILE        4               /* Symbol's name is file name */
 305 #define STT_NUM         5               /* Number of defined types.  */
 306 #define STT_LOPROC      13              /* Start of processor-specific */
 307 #define STT_HIPROC      15              /* End of processor-specific */
 308
 309
 310 /* Symbol table indices are found in the hash buckets and chain table
 311    of a symbol hash table section.  This special index value indicates
 312    the end of a chain, meaning no further symbols are found in that bucket.  */
 313
 314 #define STN_UNDEF       0               /* End of a chain.  */
 315
 316
 317 /* Relocation table entry without addend (in section of type SHT_REL).  */
 318
 319 typedef struct
 320 {
 321   Elf32_Addr    r_offset;               /* Address */
 322   Elf32_Word    r_info;                 /* Relocation type and symbol index */
 323 } Elf32_Rel;
 324
 325 /* I have seen two different definitions of the Elf64_Rel and
 326    Elf64_Rela structures, so we'll leave them out until Novell (or
 327    whoever) gets their act together.  */
 328 /* The following, at least, is used on Sparc v9, MIPS, and Alpha.  */
 329
 330 typedef struct
 331 {
 332   Elf64_Addr    r_offset;               /* Address */
 333   Elf64_Xword   r_info;                 /* Relocation type and symbol index */
 334 } Elf64_Rel;
 335
 336 /* Relocation table entry with addend (in section of type SHT_RELA).  */
 337
 338 typedef struct
 339 {
 340   Elf32_Addr    r_offset;               /* Address */
 341   Elf32_Word    r_info;                 /* Relocation type and symbol index */
 342   Elf32_Sword   r_addend;               /* Addend */
 343 } Elf32_Rela;
 344
 345 typedef struct
 346 {
 347   Elf64_Addr    r_offset;               /* Address */
 348   Elf64_Xword   r_info;                 /* Relocation type and symbol index */
 349   Elf64_Sxword  r_addend;               /* Addend */
 350 } Elf64_Rela;
 351
 352 /* How to extract and insert information held in the r_info field.  */
 353
 354 #define ELF32_R_SYM(val)                ((val) >> 8)
 355 #define ELF32_R_TYPE(val)               ((val) & 0xff)
 356 #define ELF32_R_INFO(sym, type)         (((sym) << 8) + ((type) & 0xff))
 357
 358 #define ELF64_R_SYM(i)                  ((i) >> 32)
 359 #define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
 360 #define ELF64_R_INFO(sym,type)          (((sym) << 32) + (type))
 361
 362 /* Program segment header.  */
 363
 364 typedef struct
 365 {
 366   Elf32_Word    p_type;                 /* Segment type */
 367   Elf32_Off     p_offset;               /* Segment file offset */
 368   Elf32_Addr    p_vaddr;                /* Segment virtual address */
 369   Elf32_Addr    p_paddr;                /* Segment physical address */
 370   Elf32_Word    p_filesz;               /* Segment size in file */
 371   Elf32_Word    p_memsz;                /* Segment size in memory */
 372   Elf32_Word    p_flags;                /* Segment flags */
 373   Elf32_Word    p_align;                /* Segment alignment */
 374 } Elf32_Phdr;
 375
 376 typedef struct
 377 {
 378   Elf64_Word    p_type;                 /* Segment type */
 379   Elf64_Word    p_flags;                /* Segment flags */
 380   Elf64_Off     p_offset;               /* Segment file offset */
 381   Elf64_Addr    p_vaddr;                /* Segment virtual address */
 382   Elf64_Addr    p_paddr;                /* Segment physical address */
 383   Elf64_Xword   p_filesz;               /* Segment size in file */
 384   Elf64_Xword   p_memsz;                /* Segment size in memory */
 385   Elf64_Xword   p_align;                /* Segment alignment */
 386 } Elf64_Phdr;
 387
 388 /* Legal values for p_type (segment type).  */
 389
 390 #define PT_NULL         0               /* Program header table entry unused */
 391 #define PT_LOAD         1               /* Loadable program segment */
 392 #define PT_DYNAMIC      2               /* Dynamic linking information */
 393 #define PT_INTERP       3               /* Program interpreter */
 394 #define PT_NOTE         4               /* Auxiliary information */
 395 #define PT_SHLIB        5               /* Reserved */
 396 #define PT_PHDR         6               /* Entry for header table itself */
 397 #define PT_NUM          7               /* Number of defined types.  */
 398 #define PT_LOPROC       0x70000000      /* Start of processor-specific */
 399 #define PT_HIPROC       0x7fffffff      /* End of processor-specific */
 400
 401 /* Legal values for p_flags (segment flags).  */
 402
 403 #define PF_X            (1 << 0)        /* Segment is executable */
 404 #define PF_W            (1 << 1)        /* Segment is writable */
 405 #define PF_R            (1 << 2)        /* Segment is readable */
 406 #define PF_MASKPROC     0xf0000000      /* Processor-specific */
 407
 408 /* Legal values for note segment descriptor types for core files. */
 409
 410 #define NT_PRSTATUS     1               /* Contains copy of prstatus struct */
 411 #define NT_FPREGSET     2               /* Contains copy of fpregset struct */
 412 #define NT_PRPSINFO     3               /* Contains copy of prpsinfo struct */
 413
 414 /* Legal values for the  note segment descriptor types for object files.  */
 415
 416 #define NT_VERSION      1               /* Contains a version string.  */
 417
 418
 419 /* Dynamic section entry.  */
 420
 421 typedef struct
 422 {
 423   Elf32_Sword   d_tag;                  /* Dynamic entry type */
 424   union
 425     {
 426       Elf32_Word d_val;                 /* Integer value */
 427       Elf32_Addr d_ptr;                 /* Address value */
 428     } d_un;
 429 } Elf32_Dyn;
 430
 431 typedef struct
 432 {
 433   Elf64_Sxword  d_tag;                  /* Dynamic entry type */
 434   union
 435     {
 436       Elf64_Xword d_val;                /* Integer value */
 437       Elf64_Addr d_ptr;                 /* Address value */
 438     } d_un;
 439 } Elf64_Dyn;
 440
 441 /* Legal values for d_tag (dynamic entry type).  */
 442
 443 #define DT_NULL         0               /* Marks end of dynamic section */
 444 #define DT_NEEDED       1               /* Name of needed library */
 445 #define DT_PLTRELSZ     2               /* Size in bytes of PLT relocs */
 446 #define DT_PLTGOT       3               /* Processor defined value */
 447 #define DT_HASH         4               /* Address of symbol hash table */
 448 #define DT_STRTAB       5               /* Address of string table */
 449 #define DT_SYMTAB       6               /* Address of symbol table */
 450 #define DT_RELA         7               /* Address of Rela relocs */
 451 #define DT_RELASZ       8               /* Total size of Rela relocs */
 452 #define DT_RELAENT      9               /* Size of one Rela reloc */
 453 #define DT_STRSZ        10              /* Size of string table */
 454 #define DT_SYMENT       11              /* Size of one symbol table entry */
 455 #define DT_INIT         12              /* Address of init function */
 456 #define DT_FINI         13              /* Address of termination function */
 457 #define DT_SONAME       14              /* Name of shared object */
 458 #define DT_RPATH        15              /* Library search path */
 459 #define DT_SYMBOLIC     16              /* Start symbol search here */
 460 #define DT_REL          17              /* Address of Rel relocs */
 461 #define DT_RELSZ        18              /* Total size of Rel relocs */
 462 #define DT_RELENT       19              /* Size of one Rel reloc */
 463 #define DT_PLTREL       20              /* Type of reloc in PLT */
 464 #define DT_DEBUG        21              /* For debugging; unspecified */
 465 #define DT_TEXTREL      22              /* Reloc might modify .text */
 466 #define DT_JMPREL       23              /* Address of PLT relocs */
 467 #define DT_NUM          24              /* Number used */
 468 #define DT_LOPROC       0x70000000      /* Start of processor-specific */
 469 #define DT_HIPROC       0x7fffffff      /* End of processor-specific */
 470 #define DT_PROCNUM      DT_MIPS_NUM     /* Most used by any processor */
 471
 472 /* The versioning entry types.  The next are defined as part of the
 473    GNU extension.  */
 474 #define DT_VERSYM       0x6ffffff0
 475
 476 /* These were chosen by Sun.  */
 477 #define DT_VERDEF       0x6ffffffc      /* Address of version definition
 478                                            table */
 479 #define DT_VERDEFNUM    0x6ffffffd      /* Number of version definitions */
 480 #define DT_VERNEED      0x6ffffffe      /* Address of table with needed
 481                                            versions */
 482 #define DT_VERNEEDNUM   0x6fffffff      /* Number of needed versions */
 483 #define DT_VERSIONTAGIDX(tag)   (DT_VERNEEDNUM - (tag)) /* Reverse order! */
 484 #define DT_VERSIONTAGNUM 16
 485
 486 /* Sun added these machine-independent extensions in the "processor-specific"
 487    range.  Be compatible.  */
 488 #define DT_AUXILIARY    0x7ffffffd      /* Shared object to load before self */
 489 #define DT_FILTER       0x7fffffff      /* Shared object to get values from */
 490 #define DT_EXTRATAGIDX(tag)     ((Elf32_Word)-((Elf32_Sword) (tag) <<1>>1)-1)
 491 #define DT_EXTRANUM     3
 492
 493 /* Version definition sections.  */
 494
 495 typedef struct
 496 {
 497   Elf32_Half    vd_version;             /* Version revision */
 498   Elf32_Half    vd_flags;               /* Version information */
 499   Elf32_Half    vd_ndx;                 /* Version Index */
 500   Elf32_Half    vd_cnt;                 /* Number of associated aux entries */
 501   Elf32_Word    vd_hash;                /* Version name hash value */
 502   Elf32_Word    vd_aux;                 /* Offset in bytes to verdaux array */
 503   Elf32_Word    vd_next;                /* Offset in bytes to next verdef
 504                                            entry */
 505 } Elf32_Verdef;
 506
 507 /* Legal values for vd_version (version revision).  */
 508 #define VER_DEF_NONE    0               /* No version */
 509 #define VER_DEF_CURRENT 1               /* Current version */
 510 #define VER_DEF_NUM     2               /* Given version number */
 511
 512 /* Legal values for vd_flags (version information flags).  */
 513 #define VER_FLG_BASE    0x1             /* Version definition of file itself */
 514 #define VER_FLG_WEAK    0x2             /* Weak version identifier */
 515
 516 /* Auxialiary version information.  */
 517
 518 typedef struct
 519 {
 520   Elf32_Addr    vda_name;               /* Version or dependency names */
 521   Elf32_Word    vda_next;               /* Offset in bytes to next verdaux
 522                                            entry */
 523 } Elf32_Verdaux;
 524
 525 /* Version dependency section.  */
 526
 527 typedef struct
 528 {
 529   Elf32_Half    vn_version;             /* Version of structure */
 530   Elf32_Half    vn_cnt;                 /* Number of associated aux entries */
 531   Elf32_Addr    vn_file;                /* Offset of filename for this
 532                                            dependency */
 533   Elf32_Word    vn_aux;                 /* Offset in bytes to vernaux array */
 534   Elf32_Word    vn_next;                /* Offset in bytes to next verneed
 535                                            entry */
 536 } Elf32_Verneed;
 537
 538 /* Legal values for vn_version (version revision).  */
 539 #define VER_NEED_NONE    0              /* No version */
 540 #define VER_NEED_CURRENT 1              /* Current version */
 541 #define VER_NEED_NUM     2              /* Given version number */
 542
 543 /* Auxiliary needed version information.  */
 544
 545 typedef struct
 546 {
 547   Elf32_Word    vna_hash;               /* Hash value of dependency name */
 548   Elf32_Half    vna_flags;              /* Dependency specific information */
 549   Elf32_Half    vna_other;              /* Unused */
 550   Elf32_Addr    vna_name;               /* Dependency name string offset */
 551   Elf32_Word    vna_next;               /* Offset in bytes to next vernaux
 552                                            entry */
 553 } Elf32_Vernaux;
 554
 555 /* Legal values for vna_flags.  */
 556 #define VER_FLG_WEAK    0x2             /* Weak verison identifier */
 557
 558
 559 /* Auxiliary vector.  */
 560
 561 /* This vector is normally only used by the program interpreter.  The
 562    usual definition in an ABI supplement uses the name auxv_t.  The
 563    vector is not usually defined in a standard <elf.h> file, but it
 564    can't hurt.  We rename it to avoid conflicts.  The sizes of these
 565    types are an arrangement between the exec server and the program
 566    interpreter, so we don't fully specify them here.  */
 567
 568 typedef struct
 569 {
 570   int a_type;                   /* Entry type */
 571   union
 572     {
 573       long int a_val;           /* Integer value */
 574       void *a_ptr;              /* Pointer value */
 575       void (*a_fcn) (void);     /* Function pointer value */
 576     } a_un;
 577 } Elf32_auxv_t;
 578
 579 typedef struct
 580 {
 581   long int a_type;              /* Entry type */
 582   union
 583     {
 584       long int a_val;           /* Integer value */
 585       void *a_ptr;              /* Pointer value */
 586       void (*a_fcn) (void);     /* Function pointer value */
 587     } a_un;
 588 } Elf64_auxv_t;
 589
 590 /* Legal values for a_type (entry type).  */
 591
 592 #define AT_NULL         0               /* End of vector */
 593 #define AT_IGNORE       1               /* Entry should be ignored */
 594 #define AT_EXECFD       2               /* File descriptor of program */
 595 #define AT_PHDR         3               /* Program headers for program */
 596 #define AT_PHENT        4               /* Size of program header entry */
 597 #define AT_PHNUM        5               /* Number of program headers */
 598 #define AT_PAGESZ       6               /* System page size */
 599 #define AT_BASE         7               /* Base address of interpreter */
 600 #define AT_FLAGS        8               /* Flags */
 601 #define AT_ENTRY        9               /* Entry point of program */
 602 #define AT_NOTELF       10              /* Program is not ELF */
 603 #define AT_UID          11              /* Real uid */
 604 #define AT_EUID         12              /* Effective uid */
 605 #define AT_GID          13              /* Real gid */
 606 #define AT_EGID         14              /* Effective gid */
 607
 608 /* Motorola 68k specific definitions.  */
 609
 610 /* m68k relocs.  */
 611
 612 #define R_68K_NONE      0               /* No reloc */
 613 #define R_68K_32        1               /* Direct 32 bit  */
 614 #define R_68K_16        2               /* Direct 16 bit  */
 615 #define R_68K_8         3               /* Direct 8 bit  */
 616 #define R_68K_PC32      4               /* PC relative 32 bit */
 617 #define R_68K_PC16      5               /* PC relative 16 bit */
 618 #define R_68K_PC8       6               /* PC relative 8 bit */
 619 #define R_68K_GOT32     7               /* 32 bit PC relative GOT entry */
 620 #define R_68K_GOT16     8               /* 16 bit PC relative GOT entry */
 621 #define R_68K_GOT8      9               /* 8 bit PC relative GOT entry */
 622 #define R_68K_GOT32O    10              /* 32 bit GOT offset */
 623 #define R_68K_GOT16O    11              /* 16 bit GOT offset */
 624 #define R_68K_GOT8O     12              /* 8 bit GOT offset */
 625 #define R_68K_PLT32     13              /* 32 bit PC relative PLT address */
 626 #define R_68K_PLT16     14              /* 16 bit PC relative PLT address */
 627 #define R_68K_PLT8      15              /* 8 bit PC relative PLT address */
 628 #define R_68K_PLT32O    16              /* 32 bit PLT offset */
 629 #define R_68K_PLT16O    17              /* 16 bit PLT offset */
 630 #define R_68K_PLT8O     18              /* 8 bit PLT offset */
 631 #define R_68K_COPY      19              /* Copy symbol at runtime */
 632 #define R_68K_GLOB_DAT  20              /* Create GOT entry */
 633 #define R_68K_JMP_SLOT  21              /* Create PLT entry */
 634 #define R_68K_RELATIVE  22              /* Adjust by program base */
 635
 636 /* Intel 80386 specific definitions.  */
 637
 638 /* i386 relocs.  */
 639
 640 #define R_386_NONE      0               /* No reloc */
 641 #define R_386_32        1               /* Direct 32 bit  */
 642 #define R_386_PC32      2               /* PC relative 32 bit */
 643 #define R_386_GOT32     3               /* 32 bit GOT entry */
 644 #define R_386_PLT32     4               /* 32 bit PLT address */
 645 #define R_386_COPY      5               /* Copy symbol at runtime */
 646 #define R_386_GLOB_DAT  6               /* Create GOT entry */
 647 #define R_386_JMP_SLOT  7               /* Create PLT entry */
 648 #define R_386_RELATIVE  8               /* Adjust by program base */
 649 #define R_386_GOTOFF    9               /* 32 bit offset to GOT */
 650 #define R_386_GOTPC     10              /* 32 bit PC relative offset to GOT */
 651
 652 /* SUN SPARC specific definitions.  */
 653
 654 /* SPARC relocs.  */
 655
 656 #define R_SPARC_NONE    0               /* No reloc */
 657 #define R_SPARC_8       1               /* Direct 8 bit */
 658 #define R_SPARC_16      2               /* Direct 16 bit */
 659 #define R_SPARC_32      3               /* Direct 32 bit */
 660 #define R_SPARC_DISP8   4               /* PC relative 8 bit */
 661 #define R_SPARC_DISP16  5               /* PC relative 16 bit */
 662 #define R_SPARC_DISP32  6               /* PC relative 32 bit */
 663 #define R_SPARC_WDISP30 7               /* PC relative 30 bit shifted */
 664 #define R_SPARC_WDISP22 8               /* PC relative 22 bit shifted */
 665 #define R_SPARC_HI22    9               /* High 22 bit */
 666 #define R_SPARC_22      10              /* Direct 22 bit */
 667 #define R_SPARC_13      11              /* Direct 13 bit */
 668 #define R_SPARC_LO10    12              /* Truncated 10 bit */
 669 #define R_SPARC_GOT10   13              /* Truncated 10 bit GOT entry */
 670 #define R_SPARC_GOT13   14              /* 13 bit GOT entry */
 671 #define R_SPARC_GOT22   15              /* 22 bit GOT entry shifted */
 672 #define R_SPARC_PC10    16              /* PC relative 10 bit truncated */
 673 #define R_SPARC_PC22    17              /* PC relative 22 bit shifted */
 674 #define R_SPARC_WPLT30  18              /* 30 bit PC relative PLT address */
 675 #define R_SPARC_COPY    19              /* Copy symbol at runtime */
 676 #define R_SPARC_GLOB_DAT 20             /* Create GOT entry */
 677 #define R_SPARC_JMP_SLOT 21             /* Create PLT entry */
 678 #define R_SPARC_RELATIVE 22             /* Adjust by program base */
 679 #define R_SPARC_UA32    23              /* Direct 32 bit unaligned */
 680
 681 /* MIPS R3000 specific definitions.  */
 682
 683 /* Legal values for e_flags field of Elf32_Ehdr.  */
 684
 685 #define EF_MIPS_NOREORDER 1             /* A .noreorder directive was used */
 686 #define EF_MIPS_PIC       2             /* Contains PIC code */
 687 #define EF_MIPS_CPIC      4             /* Uses PIC calling sequence */
 688 #define EF_MIPS_ARCH      0xf0000000    /* MIPS architecture level */
 689
 690 /* Legal values for MIPS architecture level.  */
 691
 692 #define E_MIPS_ARCH_1     0x00000000    /* -mips1 code.  */
 693 #define E_MIPS_ARCH_2     0x10000000    /* -mips2 code.  */
 694 #define E_MIPS_ARCH_3     0x20000000    /* -mips3 code.  */
 695
 696 /* Special section indices.  */
 697
 698 #define SHN_MIPS_ACOMMON 0xff00         /* Allocated common symbols */
 699 #define SHN_MIPS_TEXT    0xff01         /* Allocated test symbols.  */
 700 #define SHN_MIPS_DATA    0xff02         /* Allocated data symbols.  */
 701 #define SHN_MIPS_SCOMMON 0xff03         /* Small common symbols */
 702 #define SHN_MIPS_SUNDEFINED 0xff04      /* Small undefined symbols */
 703
 704 /* Legal values for sh_type field of Elf32_Shdr.  */
 705
 706 #define SHT_MIPS_LIBLIST  0x70000000    /* Shared objects used in link */
 707 #define SHT_MIPS_CONFLICT 0x70000002    /* Conflicting symbols */
 708 #define SHT_MIPS_GPTAB    0x70000003    /* Global data area sizes */
 709 #define SHT_MIPS_UCODE    0x70000004    /* Reserved for SGI/MIPS compilers */
 710 #define SHT_MIPS_DEBUG    0x70000005    /* MIPS ECOFF debugging information */
 711 #define SHT_MIPS_REGINFO  0x70000006    /* Register usage information */
 712 #define SHT_MIPS_OPTIONS  0x7000000d    /* Miscellaneous options.  */
 713 #define SHT_MIPS_DWARF    0x7000001e    /* DWARF debugging information.  */
 714 #define SHT_MIPS_EVENTS   0x70000021    /* Event section.  */
 715
 716 /* Legal values for sh_flags field of Elf32_Shdr.  */
 717
 718 #define SHF_MIPS_GPREL  0x10000000      /* Must be part of global data area */
 719
 720 /* Entries found in sections of type SHT_MIPS_GPTAB.  */
 721
 722 typedef union
 723 {
 724   struct
 725     {
 726       Elf32_Word gt_current_g_value;    /* -G value used for compilation */
 727       Elf32_Word gt_unused;             /* Not used */
 728     } gt_header;                        /* First entry in section */
 729   struct
 730     {
 731       Elf32_Word gt_g_value;            /* If this value were used for -G */
 732       Elf32_Word gt_bytes;              /* This many bytes would be used */
 733     } gt_entry;                         /* Subsequent entries in section */
 734 } Elf32_gptab;
 735
 736 /* Entry found in sections of type SHT_MIPS_REGINFO.  */
 737
 738 typedef struct
 739 {
 740   Elf32_Word    ri_gprmask;             /* General registers used */
 741   Elf32_Word    ri_cprmask[4];          /* Coprocessor registers used */
 742   Elf32_Sword   ri_gp_value;            /* $gp register value */
 743 } Elf32_RegInfo;
 744
 745 /* MIPS relocs.  */
 746
 747 #define R_MIPS_NONE     0               /* No reloc */
 748 #define R_MIPS_16       1               /* Direct 16 bit */
 749 #define R_MIPS_32       2               /* Direct 32 bit */
 750 #define R_MIPS_REL32    3               /* PC relative 32 bit */
 751 #define R_MIPS_26       4               /* Direct 26 bit shifted */
 752 #define R_MIPS_HI16     5               /* High 16 bit */
 753 #define R_MIPS_LO16     6               /* Low 16 bit */
 754 #define R_MIPS_GPREL16  7               /* GP relative 16 bit */
 755 #define R_MIPS_LITERAL  8               /* 16 bit literal entry */
 756 #define R_MIPS_GOT16    9               /* 16 bit GOT entry */
 757 #define R_MIPS_PC16     10              /* PC relative 16 bit */
 758 #define R_MIPS_CALL16   11              /* 16 bit GOT entry for function */
 759 #define R_MIPS_GPREL32  12              /* GP relative 32 bit */
 760
 761 /* Legal values for p_type field of Elf32_Phdr.  */
 762
 763 #define PT_MIPS_REGINFO 0x70000000      /* Register usage information */
 764
 765 /* Legal values for d_tag field of Elf32_Dyn.  */
 766
 767 #define DT_MIPS_RLD_VERSION  0x70000001 /* Runtime linker interface version */
 768 #define DT_MIPS_TIME_STAMP   0x70000002 /* Timestamp */
 769 #define DT_MIPS_ICHECKSUM    0x70000003 /* Checksum */
 770 #define DT_MIPS_IVERSION     0x70000004 /* Version string (string tbl index) */
 771 #define DT_MIPS_FLAGS        0x70000005 /* Flags */
 772 #define DT_MIPS_BASE_ADDRESS 0x70000006 /* Base address */
 773 #define DT_MIPS_CONFLICT     0x70000008 /* Address of CONFLICT section */
 774 #define DT_MIPS_LIBLIST      0x70000009 /* Address of LIBLIST section */
 775 #define DT_MIPS_LOCAL_GOTNO  0x7000000a /* Number of local GOT entries */
 776 #define DT_MIPS_CONFLICTNO   0x7000000b /* Number of CONFLICT entries */
 777 #define DT_MIPS_LIBLISTNO    0x70000010 /* Number of LIBLIST entries */
 778 #define DT_MIPS_SYMTABNO     0x70000011 /* Number of DYNSYM entries */
 779 #define DT_MIPS_UNREFEXTNO   0x70000012 /* First external DYNSYM */
 780 #define DT_MIPS_GOTSYM       0x70000013 /* First GOT entry in DYNSYM */
 781 #define DT_MIPS_HIPAGENO     0x70000014 /* Number of GOT page table entries */
 782 #define DT_MIPS_RLD_MAP      0x70000016 /* Address of run time loader map.  */
 783 #define DT_MIPS_NUM          0x17
 784
 785 /* Legal values for DT_MIPS_FLAG Elf32_Dyn entry.  */
 786
 787 #define RHF_NONE                   0            /* No flags */
 788 #define RHF_QUICKSTART             (1 << 0)     /* Use quickstart */
 789 #define RHF_NOTPOT                 (1 << 1)     /* Hash size not power of 2 */
 790 #define RHF_NO_LIBRARY_REPLACEMENT (1 << 2)     /* Ignore LD_LIBRARY_PATH */
 791
 792 /* Entries found in sections of type SHT_MIPS_LIBLIST.  */
 793
 794 typedef struct
 795 {
 796   Elf32_Word    l_name;                 /* Name (string table index) */
 797   Elf32_Word    l_time_stamp;           /* Timestamp */
 798   Elf32_Word    l_checksum;             /* Checksum */
 799   Elf32_Word    l_version;              /* Interface version */
 800   Elf32_Word    l_flags;                /* Flags */
 801 } Elf32_Lib;
 802
 803 /* Legal values for l_flags.  */
 804
 805 #define LL_EXACT_MATCH    (1 << 0)      /* Require exact match */
 806 #define LL_IGNORE_INT_VER (1 << 1)      /* Ignore interface version */
 807
 808 /* Entries found in sections of type SHT_MIPS_CONFLICT.  */
 809
 810 typedef Elf32_Addr Elf32_Conflict;
 811
 812
 813 /* HPPA specific definitions.  */
 814
 815 /* Legal values for sh_type field of Elf32_Shdr.  */
 816
 817 #define SHT_PARISC_GOT          0x70000000 /* GOT for external data.  */
 818 #define SHT_PARISC_ARCH         0x70000001 /* Architecture extensions.  */
 819 #define SHT_PARISC_GLOBAL       0x70000002 /* Definition of $global$.  */
 820 #define SHT_PARISC_MILLI        0x70000003 /* Millicode routines.  */
 821 #define SHT_PARISC_UNWIND       0x70000004 /* Unwind information.  */
 822 #define SHT_PARISC_PLT          0x70000005 /* Procedure linkage table.  */
 823 #define SHT_PARISC_SDATA        0x70000006 /* Short initialized data.  */
 824 #define SHT_PARISC_SBSS         0x70000007 /* Short uninitialized data.  */
 825 #define SHT_PARISC_SYMEXTN      0x70000008 /* Argument/relocation info.  */
 826 #define SHT_PARISC_STUBS        0x70000009 /* Linker stubs.  */
 827
 828 /* Legal values for sh_flags field of Elf32_Shdr.  */
 829
 830 #define SHF_PARISC_SHORT        0x20000000 /* Section with short addressing. */
 831
 832 /* Legal values for ST_TYPE subfield of st_info (symbol type).  */
 833
 834 #define STT_PARISC_MILLICODE    13      /* Millicode function entry point.  */
 835
 836
 837 /* Alpha specific declarations.  */
 838
 839 /* Alpha relocs.  */
 840
 841 #define R_ALPHA_NONE            0       /* No reloc */
 842 #define R_ALPHA_REFLONG         1       /* Direct 32 bit */
 843 #define R_ALPHA_REFQUAD         2       /* Direct 64 bit */
 844 #define R_ALPHA_GPREL32         3       /* GP relative 32 bit */
 845 #define R_ALPHA_LITERAL         4       /* GP relative 16 bit w/optimization */
 846 #define R_ALPHA_LITUSE          5       /* Optimization hint for LITERAL */
 847 #define R_ALPHA_GPDISP          6       /* Add displacement to GP */
 848 #define R_ALPHA_BRADDR          7       /* PC+4 relative 23 bit shifted */
 849 #define R_ALPHA_HINT            8       /* PC+4 relative 16 bit shifted */
 850 #define R_ALPHA_SREL16          9       /* PC relative 16 bit */
 851 #define R_ALPHA_SREL32          10      /* PC relative 32 bit */
 852 #define R_ALPHA_SREL64          11      /* PC relative 64 bit */
 853 #define R_ALPHA_OP_PUSH         12      /* OP stack push */
 854 #define R_ALPHA_OP_STORE        13      /* OP stack pop and store */
 855 #define R_ALPHA_OP_PSUB         14      /* OP stack subtract */
 856 #define R_ALPHA_OP_PRSHIFT      15      /* OP stack right shift */
 857 #define R_ALPHA_GPVALUE         16
 858 #define R_ALPHA_GPRELHIGH       17
 859 #define R_ALPHA_GPRELLOW        18
 860 #define R_ALPHA_IMMED_GP_16     19
 861 #define R_ALPHA_IMMED_GP_HI32   20
 862 #define R_ALPHA_IMMED_SCN_HI32  21
 863 #define R_ALPHA_IMMED_BR_HI32   22
 864 #define R_ALPHA_IMMED_LO32      23
 865 #define R_ALPHA_COPY            24      /* Copy symbol at runtime */
 866 #define R_ALPHA_GLOB_DAT        25      /* Create GOT entry */
 867 #define R_ALPHA_JMP_SLOT        26      /* Create PLT entry */
 868 #define R_ALPHA_RELATIVE        27      /* Adjust by program base */
 869
 870 __END_DECLS
 871
 872 #endif  /* elf.h */