elf/elf.h

   1 /* This file defines standard ELF types, structures, and macros.
   2 Copyright (C) 1995 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.
  27
  28    Using __attribute__ mode ensures that gcc will choose the right for
  29    these types.  */
  30
  31 typedef unsigned int Elf32_Addr    __attribute__ ((mode (SI)));
  32 typedef unsigned int Elf32_Half    __attribute__ ((mode (HI)));
  33 typedef unsigned int Elf32_Off     __attribute__ ((mode (SI)));
  34 typedef          int Elf32_Sword   __attribute__ ((mode (SI)));
  35 typedef unsigned int Elf32_Word    __attribute__ ((mode (SI)));
  36
  37 /* The ELF file header.  This appears at the start of every ELF file.  */
  38
  39 #define EI_NIDENT (16)
  40
  41 typedef struct
  42 {
  43   unsigned char e_ident[EI_NIDENT];     /* Magic number and other info */
  44   Elf32_Half    e_type;                 /* Object file type */
  45   Elf32_Half    e_machine;              /* Architecture */
  46   Elf32_Word    e_version;              /* Object file version */
  47   Elf32_Addr    e_entry;                /* Entry point virtual address */
  48   Elf32_Off     e_phoff;                /* Program header table file offset */
  49   Elf32_Off     e_shoff;                /* Section header table file offset */
  50   Elf32_Word    e_flags;                /* Processor-specific flags */
  51   Elf32_Half    e_ehsize;               /* ELF header size in bytes */
  52   Elf32_Half    e_phentsize;            /* Program header table entry size */
  53   Elf32_Half    e_phnum;                /* Program header table entry count */
  54   Elf32_Half    e_shentsize;            /* Section header table entry size */
  55   Elf32_Half    e_shnum;                /* Section header table entry count */
  56   Elf32_Half    e_shstrndx;             /* Section header string table index */
  57 } Elf32_Ehdr;
  58
  59 /* Fields in the e_ident array.  The EI_* macros are indices into the
  60    array.  The macros under each EI_* macro are the values the byte
  61    may have.  */
  62
  63 #define EI_MAG0         0               /* File identification byte 0 index */
  64 #define ELFMAG0         0x7f            /* Magic number byte 0 */
  65
  66 #define EI_MAG1         1               /* File identification byte 1 index */
  67 #define ELFMAG1         'E'             /* Magic number byte 1 */
  68
  69 #define EI_MAG2         2               /* File identification byte 2 index */
  70 #define ELFMAG2         'L'             /* Magic number byte 2 */
  71
  72 #define EI_MAG3         3               /* File identification byte 3 index */
  73 #define ELFMAG3         'F'             /* Magic number byte 3 */
  74
  75 /* Conglomeration of the identification bytes, for easy testing as a word.  */
  76 #define ELFMAG          "\177ELF"
  77 #define SELFMAG         4
  78
  79 #define EI_CLASS        4               /* File class byte index */
  80 #define ELFCLASSNONE    0               /* Invalid class */
  81 #define ELFCLASS32      1               /* 32-bit objects */
  82 #define ELFCLASS64      2               /* 64-bit objects */
  83
  84 #define EI_DATA         5               /* Data encoding byte index */
  85 #define ELFDATANONE     0               /* Invalid data encoding */
  86 #define ELFDATA2LSB     1               /* 2's complement, little endian */
  87 #define ELFDATA2MSB     2               /* 2's complement, big endian */
  88
  89 #define EI_VERSION      6               /* File version byte index */
  90                                         /* Value must be EV_CURRENT */
  91
  92 #define EI_PAD          7               /* Byte index of padding bytes */
  93
  94 /* Legal values for e_type (object file type).  */
  95
  96 #define ET_NONE         0               /* No file type */
  97 #define ET_REL          1               /* Relocatable file */
  98 #define ET_EXEC         2               /* Executable file */
  99 #define ET_DYN          3               /* Shared object file */
 100 #define ET_CORE         4               /* Core file */
 101 #define ET_LOPROC       0xff00          /* Processor-specific */
 102 #define ET_HIPROC       0xffff          /* Processor-specific */
 103
 104 /* Legal values for e_machine (architecture).  */
 105
 106 #define EM_NONE         0               /* No machine */
 107 #define EM_M32          1               /* AT&T WE 32100 */
 108 #define EM_SPARC        2               /* SUN SPARC */
 109 #define EM_386          3               /* Intel 80386 */
 110 #define EM_68K          4               /* Motorola m68k family */
 111 #define EM_88K          5               /* Motorola m88k family */
 112 #define EM_486          6               /* Intel 80486 */
 113 #define EM_860          7               /* Intel 80860 */
 114 #define EM_MIPS         8               /* MIPS R3000 big-endian */
 115 #define EM_S370         9               /* Amdhal */
 116 #define EM_MIPS_RS4_BE 10               /* MIPS R4000 big-endian */
 117
 118 #define EM_SPARC64     11               /* SPARC v9 (not official) 64-bit */
 119
 120 #define EM_PARISC      15               /* HPPA */
 121
 122 /* If it is necessary to assign new unofficial EM_* values, please
 123    pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
 124    chances of collision with official or non-GNU unofficial values.  */
 125
 126 /* Legal values for e_version (version).  */
 127
 128 #define EV_NONE         0               /* Invalid ELF version */
 129 #define EV_CURRENT      1               /* Current version */
 130
 131 /* Section header.  */
 132
 133 typedef struct
 134 {
 135   Elf32_Word    sh_name;                /* Section name (string tbl index) */
 136   Elf32_Word    sh_type;                /* Section type */
 137   Elf32_Word    sh_flags;               /* Section flags */
 138   Elf32_Addr    sh_addr;                /* Section virtual addr at execution */
 139   Elf32_Off     sh_offset;              /* Section file offset */
 140   Elf32_Word    sh_size;                /* Section size in bytes */
 141   Elf32_Word    sh_link;                /* Link to another section */
 142   Elf32_Word    sh_info;                /* Additional section information */
 143   Elf32_Word    sh_addralign;           /* Section alignment */
 144   Elf32_Word    sh_entsize;             /* Entry size if section holds table */
 145 } Elf32_Shdr;
 146
 147 /* Special section indices.  */
 148
 149 #define SHN_UNDEF       0               /* Undefined section */
 150 #define SHN_LORESERVE   0xff00          /* Start of reserved indices */
 151 #define SHN_LOPROC      0xff00          /* Start of processor-specific */
 152 #define SHN_HIPROC      0xff1f          /* End of processor-specific */
 153 #define SHN_ABS         0xfff1          /* Associated symbol is absolute */
 154 #define SHN_COMMON      0xfff2          /* Associated symbol is common */
 155 #define SHN_HIRESERVE   0xffff          /* End of reserved indices */
 156
 157 /* Legal values for sh_type (section type).  */
 158
 159 #define SHT_NULL        0               /* Section header table entry unused */
 160 #define SHT_PROGBITS    1               /* Program data */
 161 #define SHT_SYMTAB      2               /* Symbol table */
 162 #define SHT_STRTAB      3               /* String table */
 163 #define SHT_RELA        4               /* Relocation entries with addends */
 164 #define SHT_HASH        5               /* Symbol hash table */
 165 #define SHT_DYNAMIC     6               /* Dynamic linking information */
 166 #define SHT_NOTE        7               /* Notes */
 167 #define SHT_NOBITS      8               /* Program space with no data (bss) */
 168 #define SHT_REL         9               /* Relocation entries, no addends */
 169 #define SHT_SHLIB       10              /* Reserved */
 170 #define SHT_DYNSYM      11              /* Dynamic linker symbol table */
 171 #define SHT_LOPROC      0x70000000      /* Start of processor-specific */
 172 #define SHT_HIPROC      0x7fffffff      /* End of processor-specific */
 173 #define SHT_LOUSER      0x80000000      /* Start of application-specific */
 174 #define SHT_HIUSER      0x8fffffff      /* End of application-specific */
 175
 176 /* Legal values for sh_flags (section flags).  */
 177
 178 #define SHF_WRITE       (1 << 0)        /* Writable */
 179 #define SHF_ALLOC       (1 << 1)        /* Occupies memory during execution */
 180 #define SHF_EXECINSTR   (1 << 2)        /* Executable */
 181 #define SHF_MASKPROC    0xf0000000      /* Processor-specific */
 182
 183 /* Symbol table entry.  */
 184
 185 typedef struct
 186 {
 187   Elf32_Word    st_name;                /* Symbol name (string tbl index) */
 188   Elf32_Addr    st_value;               /* Symbol value */
 189   Elf32_Word    st_size;                /* Symbol size */
 190   unsigned char st_info;                /* Symbol type and binding */
 191   unsigned char st_other;               /* No defined meaning, 0 */
 192   Elf32_Half    st_shndx;               /* Section index */
 193 } Elf32_Sym;
 194
 195 /* Special section index.  */
 196
 197 #define SHN_UNDEF       0               /* No section, undefined symbol.  */
 198
 199 /* How to extract and insert information held in the st_info field.  */
 200
 201 #define ELF32_ST_BIND(val)              (((unsigned char) (val)) >> 4)
 202 #define ELF32_ST_TYPE(val)              ((val) & 0xf)
 203 #define ELF32_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))
 204
 205 /* Legal values for ST_BIND subfield of st_info (symbol binding).  */
 206
 207 #define STB_LOCAL       0               /* Local symbol */
 208 #define STB_GLOBAL      1               /* Global symbol */
 209 #define STB_WEAK        2               /* Weak symbol */
 210 #define STB_LOPROC      13              /* Start of processor-specific */
 211 #define STB_HIPROC      15              /* End of processor-specific */
 212
 213 /* Legal values for ST_TYPE subfield of st_info (symbol type).  */
 214
 215 #define STT_NOTYPE      0               /* Symbol type is unspecified */
 216 #define STT_OBJECT      1               /* Symbol is a data object */
 217 #define STT_FUNC        2               /* Symbol is a code object */
 218 #define STT_SECTION     3               /* Symbol associated with a section */
 219 #define STT_FILE        4               /* Symbol's name is file name */
 220 #define STT_LOPROC      13              /* Start of processor-specific */
 221 #define STT_HIPROC      15              /* End of processor-specific */
 222
 223
 224 /* Symbol table indices are found in the hash buckets and chain table
 225    of a symbol hash table section.  This special index value indicates
 226    the end of a chain, meaning no further symbols are found in that bucket.  */
 227
 228 #define STN_UNDEF       0               /* End of a chain.  */
 229
 230
 231 /* Relocation table entry without addend (in section of type SHT_REL).  */
 232
 233 typedef struct
 234 {
 235   Elf32_Addr    r_offset;               /* Address */
 236   Elf32_Word    r_info;                 /* Relocation type and symbol index */
 237 } Elf32_Rel;
 238
 239 /* Relocation table entry with addend (in section of type SHT_RELA).  */
 240
 241 typedef struct
 242 {
 243   Elf32_Addr    r_offset;               /* Address */
 244   Elf32_Word    r_info;                 /* Relocation type and symbol index */
 245   Elf32_Sword   r_addend;               /* Addend */
 246 } Elf32_Rela;
 247
 248 /* How to extract and insert information held in the r_info field.  */
 249
 250 #define ELF32_R_SYM(val)                ((val) >> 8)
 251 #define ELF32_R_TYPE(val)               ((val) & 0xff)
 252 #define ELF32_R_INFO(sym, type)         (((sym) << 8) + ((type) & 0xff))
 253
 254 /* Program segment header.  */
 255
 256 typedef struct {
 257   Elf32_Word    p_type;                 /* Segment type */
 258   Elf32_Off     p_offset;               /* Segment file offset */
 259   Elf32_Addr    p_vaddr;                /* Segment virtual address */
 260   Elf32_Addr    p_paddr;                /* Segment physical address */
 261   Elf32_Word    p_filesz;               /* Segment size in file */
 262   Elf32_Word    p_memsz;                /* Segment size in memory */
 263   Elf32_Word    p_flags;                /* Segment flags */
 264   Elf32_Word    p_align;                /* Segment alignment */
 265 } Elf32_Phdr;
 266
 267 /* Legal values for p_type (segment type).  */
 268
 269 #define PT_NULL         0               /* Program header table entry unused */
 270 #define PT_LOAD         1               /* Loadable program segment */
 271 #define PT_DYNAMIC      2               /* Dynamic linking information */
 272 #define PT_INTERP       3               /* Program interpreter */
 273 #define PT_NOTE         4               /* Auxiliary information */
 274 #define PT_SHLIB        5               /* Reserved */
 275 #define PT_PHDR         6               /* Entry for header table itself */
 276 #define PT_LOPROC       0x70000000      /* Start of processor-specific */
 277 #define PT_HIPROC       0x7fffffff      /* End of processor-specific */
 278
 279 /* Legal values for p_flags (segment flags).  */
 280
 281 #define PF_X            (1 << 0)        /* Segment is executable */
 282 #define PF_W            (1 << 1)        /* Segment is writable */
 283 #define PF_R            (1 << 2)        /* Segment is readable */
 284 #define PF_MASKPROC     0xf0000000      /* Processor-specific */
 285
 286 /* Dynamic section entry.  */
 287
 288 typedef struct
 289 {
 290   Elf32_Sword   d_tag;                  /* Dynamic entry type */
 291   union
 292     {
 293       Elf32_Word d_val;                 /* Integer value */
 294       Elf32_Addr d_ptr;                 /* Address value */
 295     } d_un;
 296 } Elf32_Dyn;
 297
 298 /* Legal values for d_tag (dynamic entry type).  */
 299
 300 #define DT_NULL         0               /* Marks end of dynamic section */
 301 #define DT_NEEDED       1               /* Name of needed library */
 302 #define DT_PLTRELSZ     2               /* Size in bytes of PLT relocs */
 303 #define DT_PLTGOT       3               /* Processor defined value */
 304 #define DT_HASH         4               /* Address of symbol hash table */
 305 #define DT_STRTAB       5               /* Address of string table */
 306 #define DT_SYMTAB       6               /* Address of symbol table */
 307 #define DT_RELA         7               /* Address of Rela relocs */
 308 #define DT_RELASZ       8               /* Total size of Rela relocs */
 309 #define DT_RELAENT      9               /* Size of one Rela reloc */
 310 #define DT_STRSZ        10              /* Size of string table */
 311 #define DT_SYMENT       11              /* Size of one symbol table entry */
 312 #define DT_INIT         12              /* Address of init function */
 313 #define DT_FINI         13              /* Address of termination function */
 314 #define DT_SONAME       14              /* Name of shared object */
 315 #define DT_RPATH        15              /* Library search path */
 316 #define DT_SYMBOLIC     16              /* Start symbol search here */
 317 #define DT_REL          17              /* Address of Rel relocs */
 318 #define DT_RELSZ        18              /* Total size of Rel relocs */
 319 #define DT_RELENT       19              /* Size of one Rel reloc */
 320 #define DT_PLTREL       20              /* Type of reloc in PLT */
 321 #define DT_DEBUG        21              /* For debugging; unspecified */
 322 #define DT_TEXTREL      22              /* Reloc might modify .text */
 323 #define DT_JMPREL       23              /* Address of PLT relocs */
 324 #define DT_NUM          24              /* Number used.  */
 325 #define DT_LOPROC       0x70000000      /* Start of processor-specific */
 326 #define DT_HIPROC       0x7fffffff      /* End of processor-specific */
 327
 328 /* Standard 64 bit ELF types.  */
 329
 330 typedef unsigned int Elf64_Addr    __attribute__ ((mode (DI)));
 331 typedef unsigned int Elf64_Half    __attribute__ ((mode (HI)));
 332 typedef unsigned int Elf64_Off     __attribute__ ((mode (DI)));
 333 typedef          int Elf64_Sword   __attribute__ ((mode (SI)));
 334 typedef          int Elf64_Sxword  __attribute__ ((mode (DI)));
 335 typedef unsigned int Elf64_Word    __attribute__ ((mode (SI)));
 336 typedef unsigned int Elf64_Xword   __attribute__ ((mode (DI)));
 337 typedef unsigned int Elf64_Byte    __attribute__ ((mode (QI)));
 338 typedef unsigned int Elf64_Section __attribute__ ((mode (HI)));
 339
 340 /* 64 bit ELF file header.  */
 341
 342 typedef struct
 343 {
 344   unsigned char e_ident[EI_NIDENT];     /* Magic number and other info */
 345   Elf64_Half    e_type;                 /* Object file type */
 346   Elf64_Half    e_machine;              /* Architecture */
 347   Elf64_Word    e_version;              /* Object file version */
 348   Elf64_Addr    e_entry;                /* Entry point virtual address */
 349   Elf64_Off     e_phoff;                /* Program header table file offset */
 350   Elf64_Off     e_shoff;                /* Section header table file offset */
 351   Elf64_Word    e_flags;                /* Processor-specific flags */
 352   Elf64_Half    e_ehsize;               /* ELF header size in bytes */
 353   Elf64_Half    e_phentsize;            /* Program header table entry size */
 354   Elf64_Half    e_phnum;                /* Program header table entry count */
 355   Elf64_Half    e_shentsize;            /* Section header table entry size */
 356   Elf64_Half    e_shnum;                /* Section header table entry count */
 357   Elf64_Half    e_shstrndx;             /* Section header string table index */
 358 } Elf64_Ehdr;
 359
 360 /* 64 bit section header.  */
 361
 362 typedef struct
 363 {
 364   Elf64_Word    sh_name;                /* Section name (string tbl index) */
 365   Elf64_Word    sh_type;                /* Section type */
 366   Elf64_Xword   sh_flags;               /* Section flags */
 367   Elf64_Addr    sh_addr;                /* Section virtual addr at execution */
 368   Elf64_Off     sh_offset;              /* Section file offset */
 369   Elf64_Xword   sh_size;                /* Section size in bytes */
 370   Elf64_Word    sh_link;                /* Link to another section */
 371   Elf64_Word    sh_info;                /* Additional section information */
 372   Elf64_Xword   sh_addralign;           /* Section alignment */
 373   Elf64_Xword   sh_entsize;             /* Entry size if section holds table */
 374 } Elf64_Shdr;
 375
 376 /* 64 bit symbol table entry.  */
 377
 378 typedef struct
 379 {
 380   Elf64_Word    st_name;                /* Symbol name (string tbl index) */
 381   Elf64_Byte    st_info;                /* Symbol type and binding */
 382   Elf64_Byte    st_other;               /* No defined meaning, 0 */
 383   Elf64_Section st_shndx;               /* Section index */
 384   Elf64_Addr    st_value;               /* Symbol value */
 385   Elf64_Xword   st_size;                /* Symbol size */
 386 } Elf64_Sym;
 387
 388 /* The 64 bit st_info field is the same as the 32 bit one.  */
 389
 390 #define ELF64_ST_BIND(val)              (((unsigned char) (val)) >> 4)
 391 #define ELF64_ST_TYPE(val)              ((val) & 0xf)
 392 #define ELF64_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))
 393
 394 /* I have seen two different definitions of the Elf64_Rel and
 395    Elf64_Rela structures, so we'll leave them out until Novell (or
 396    whoever) gets their act together.  */
 397
 398 /* Auxiliary vector.  */
 399
 400 /* This vector is normally only used by the program interpreter.  The
 401    usual definition in an ABI supplement uses the name auxv_t.  The
 402    vector is not usually defined in a standard <elf.h> file, but it
 403    can't hurt.  We rename it to avoid conflicts.  The sizes of these
 404    types are an arrangement between the exec server and the program
 405    interpreter, so we don't fully specify them here.  */
 406
 407 typedef struct
 408 {
 409   int a_type;                           /* Entry type */
 410   union
 411     {
 412       long a_val;                       /* Integer value */
 413       void *a_ptr;                      /* Pointer value */
 414       void (*a_fcn) ();                 /* Function pointer value */
 415     } a_un;
 416 } Elf32_auxv_t;
 417
 418 /* Legal values for a_type (entry type).  */
 419
 420 #define AT_NULL         0               /* End of vector */
 421 #define AT_IGNORE       1               /* Entry should be ignored */
 422 #define AT_EXECFD       2               /* File descriptor of program */
 423 #define AT_PHDR         3               /* Program headers for program */
 424 #define AT_PHENT        4               /* Size of program header entry */
 425 #define AT_PHNUM        5               /* Number of program headers */
 426 #define AT_PAGESZ       6               /* System page size */
 427 #define AT_BASE         7               /* Base address of interpreter */
 428 #define AT_FLAGS        8               /* Flags */
 429 #define AT_ENTRY        9               /* Entry point of program */
 430 #define AT_NOTELF       10              /* Program is not ELF */
 431 #define AT_UID          11              /* Real uid */
 432 #define AT_EUID         12              /* Effective uid */
 433 #define AT_GID          13              /* Read gid */
 434 #define AT_EGID         14              /* Effective gid */
 435
 436 /* Intel 80386 specific definitions.  */
 437
 438 /* i386 relocs.  */
 439
 440 #define R_386_NONE      0               /* No reloc */
 441 #define R_386_32        1               /* Direct 32 bit  */
 442 #define R_386_PC32      2               /* PC relative 32 bit */
 443 #define R_386_GOT32     3               /* 32 bit GOT entry */
 444 #define R_386_PLT32     4               /* 32 bit PLT address */
 445 #define R_386_COPY      5               /* Copy symbol at runtime */
 446 #define R_386_GLOB_DAT  6               /* Create GOT entry */
 447 #define R_386_JMP_SLOT  7               /* Create PLT entry */
 448 #define R_386_RELATIVE  8               /* Adjust by program base */
 449 #define R_386_GOTOFF    9               /* 32 bit offset to GOT */
 450 #define R_386_GOTPC     10              /* 32 bit PC relative offset to GOT */
 451
 452 /* SUN SPARC specific definitions.  */
 453
 454 /* SPARC relocs.  */
 455
 456 #define R_SPARC_NONE    0               /* No reloc */
 457 #define R_SPARC_8       1               /* Direct 8 bit */
 458 #define R_SPARC_16      2               /* Direct 16 bit */
 459 #define R_SPARC_32      3               /* Direct 32 bit */
 460 #define R_SPARC_DISP8   4               /* PC relative 8 bit */
 461 #define R_SPARC_DISP16  5               /* PC relative 16 bit */
 462 #define R_SPARC_DISP32  6               /* PC relative 32 bit */
 463 #define R_SPARC_WDISP30 7               /* PC relative 30 bit shifted */
 464 #define R_SPARC_WDISP22 8               /* PC relative 22 bit shifted */
 465 #define R_SPARC_HI22    9               /* High 22 bit */
 466 #define R_SPARC_22      10              /* Direct 22 bit */
 467 #define R_SPARC_13      11              /* Direct 13 bit */
 468 #define R_SPARC_LO10    12              /* Truncated 10 bit */
 469 #define R_SPARC_GOT10   13              /* Truncated 10 bit GOT entry */
 470 #define R_SPARC_GOT13   14              /* 13 bit GOT entry */
 471 #define R_SPARC_GOT22   15              /* 22 bit GOT entry shifted */
 472 #define R_SPARC_PC10    16              /* PC relative 10 bit truncated */
 473 #define R_SPARC_PC22    17              /* PC relative 22 bit shifted */
 474 #define R_SPARC_WPLT30  18              /* 30 bit PC relative PLT address */
 475 #define R_SPARC_COPY    19              /* Copy symbol at runtime */
 476 #define R_SPARC_GLOB_DAT 20             /* Create GOT entry */
 477 #define R_SPARC_JMP_SLOT 21             /* Create PLT entry */
 478 #define R_SPARC_RELATIVE 22             /* Adjust by program base */
 479 #define R_SPARC_UA32    23              /* Direct 32 bit unaligned */
 480
 481 /* MIPS R3000 specific definitions.  */
 482
 483 /* Legal values for e_flags field of Elf32_Ehdr.  */
 484
 485 #define EF_MIPS_NOREORDER 1             /* A .noreorder directive was used */
 486 #define EF_MIPS_PIC       2             /* Contains PIC code */
 487 #define EF_MIPS_CPIC      4             /* Uses PIC calling sequence */
 488 #define EF_MIPS_ARCH      0xf0000000    /* MIPS architecture level */
 489
 490 /* Special section indices.  */
 491
 492 #define SHN_MIPS_ACOMMON 0xff00         /* Allocated common symbols */
 493 #define SHN_MIPS_SCOMMON 0xff03         /* Small common symbols */
 494 #define SHN_MIPS_SUNDEFINED 0xff04      /* Small undefined symbols */
 495
 496 /* Legal values for sh_type field of Elf32_Shdr.  */
 497
 498 #define SHT_MIPS_LIBLIST  0x70000000    /* Shared objects used in link */
 499 #define SHT_MIPS_CONFLICT 0x70000002    /* Conflicting symbols */
 500 #define SHT_MIPS_GPTAB    0x70000003    /* Global data area sizes */
 501 #define SHT_MIPS_UCODE    0x70000004    /* Reserved for SGI/MIPS compilers */
 502 #define SHT_MIPS_DEBUG    0x70000005    /* MIPS ECOFF debugging information */
 503 #define SHT_MIPS_REGINFO  0x70000006    /* Register usage information */
 504
 505 /* Legal values for sh_flags field of Elf32_Shdr.  */
 506
 507 #define SHF_MIPS_GPREL  0x10000000      /* Must be part of global data area */
 508
 509 /* Entries found in sections of type SHT_MIPS_GPTAB.  */
 510
 511 typedef union
 512 {
 513   struct
 514     {
 515       Elf32_Word gt_current_g_value;    /* -G value used for compilation */
 516       Elf32_Word gt_unused;             /* Not used */
 517     } gt_header;                        /* First entry in section */
 518   struct
 519     {
 520       Elf32_Word gt_g_value;            /* If this value were used for -G */
 521       Elf32_Word gt_bytes;              /* This many bytes would be used */
 522     } gt_entry;                         /* Subsequent entries in section */
 523 } Elf32_gptab;
 524
 525 /* Entry found in sections of type SHT_MIPS_REGINFO.  */
 526
 527 typedef struct
 528 {
 529   Elf32_Word    ri_gprmask;             /* General registers used */
 530   Elf32_Word    ri_cprmask[4];          /* Coprocessor registers used */
 531   Elf32_Sword   ri_gp_value;            /* $gp register value */
 532 } Elf32_RegInfo;
 533
 534 /* MIPS relocs.  */
 535
 536 #define R_MIPS_NONE     0               /* No reloc */
 537 #define R_MIPS_16       1               /* Direct 16 bit */
 538 #define R_MIPS_32       2               /* Direct 32 bit */
 539 #define R_MIPS_REL32    3               /* PC relative 32 bit */
 540 #define R_MIPS_26       4               /* Direct 26 bit shifted */
 541 #define R_MIPS_HI16     5               /* High 16 bit */
 542 #define R_MIPS_LO16     6               /* Low 16 bit */
 543 #define R_MIPS_GPREL16  7               /* GP relative 16 bit */
 544 #define R_MIPS_LITERAL  8               /* 16 bit literal entry */
 545 #define R_MIPS_GOT16    9               /* 16 bit GOT entry */
 546 #define R_MIPS_PC16     10              /* PC relative 16 bit */
 547 #define R_MIPS_CALL16   11              /* 16 bit GOT entry for function */
 548 #define R_MIPS_GPREL32  12              /* GP relative 32 bit */
 549
 550 /* Legal values for p_type field of Elf32_Phdr.  */
 551
 552 #define PT_MIPS_REGINFO 0x70000000      /* Register usage information */
 553
 554 /* Legal values for d_tag field of Elf32_Dyn.  */
 555
 556 #define DT_MIPS_RLD_VERSION  0x70000001 /* Runtime linker interface version */
 557 #define DT_MIPS_TIME_STAMP   0x70000002 /* Timestamp */
 558 #define DT_MIPS_ICHECKSUM    0x70000003 /* Checksum */
 559 #define DT_MIPS_IVERSION     0x70000004 /* Version string (string tbl index) */
 560 #define DT_MIPS_FLAGS        0x70000005 /* Flags */
 561 #define DT_MIPS_BASE_ADDRESS 0x70000006 /* Base address */
 562 #define DT_MIPS_CONFLICT     0x70000008 /* Address of CONFLICT section */
 563 #define DT_MIPS_LIBLIST      0x70000009 /* Address of LIBLIST section */
 564 #define DT_MIPS_LOCAL_GOTNO  0x7000000a /* Number of local GOT entries */
 565 #define DT_MIPS_CONFLICTNO   0x7000000b /* Number of CONFLICT entries */
 566 #define DT_MIPS_LIBLISTNO    0x70000010 /* Number of LIBLIST entries */
 567 #define DT_MIPS_SYMTABNO     0x70000011 /* Number of DYNSYM entries */
 568 #define DT_MIPS_UNREFEXTNO   0x70000012 /* First external DYNSYM */
 569 #define DT_MIPS_GOTSYM       0x70000013 /* First GOT entry in DYNSYM */
 570 #define DT_MIPS_HIPAGENO     0x70000014 /* Number of GOT page table entries */
 571
 572 /* Legal values for DT_MIPS_FLAG Elf32_Dyn entry.  */
 573
 574 #define RHF_NONE                   0            /* No flags */
 575 #define RHF_QUICKSTART             (1 << 0)     /* Use quickstart */
 576 #define RHF_NOTPOT                 (1 << 1)     /* Hash size not power of 2 */
 577 #define RHF_NO_LIBRARY_REPLACEMENT (1 << 2)     /* Ignore LD_LIBRARY_PATH */
 578
 579 /* Entries found in sections of type SHT_MIPS_LIBLIST.  */
 580
 581 typedef struct
 582 {
 583   Elf32_Word    l_name;                 /* Name (string table index) */
 584   Elf32_Word    l_time_stamp;           /* Timestamp */
 585   Elf32_Word    l_checksum;             /* Checksum */
 586   Elf32_Word    l_version;              /* Interface version */
 587   Elf32_Word    l_flags;                /* Flags */
 588 } Elf32_Lib;
 589
 590 /* Legal values for l_flags.  */
 591
 592 #define LL_EXACT_MATCH    (1 << 0)      /* Require exact match */
 593 #define LL_IGNORE_INT_VER (1 << 1)      /* Ignore interface version */
 594
 595 /* Entries found in sections of type SHT_MIPS_CONFLICT.  */
 596
 597 typedef Elf32_Addr Elf32_Conflict;
 598
 599
 600 #endif  /* elf.h */