include/linux/elf.h

   1 #ifndef _LINUX_ELF_H
   2 #define _LINUX_ELF_H
   3
   4 #include <linux/types.h>
   5 #include <asm/elf.h>
   6
   7 /* 32-bit ELF base types. */
   8 typedef __u32   Elf32_Addr;
   9 typedef __u16   Elf32_Half;
  10 typedef __u32   Elf32_Off;
  11 typedef __s32   Elf32_Sword;
  12 typedef __u32   Elf32_Word;
  13
  14 /* 64-bit ELF base types. */
  15 typedef __u64   Elf64_Addr;
  16 typedef __u16   Elf64_Half;
  17 typedef __s16   Elf64_SHalf;
  18 typedef __u64   Elf64_Off;
  19 typedef __s64   Elf64_Sword;
  20 typedef __u64   Elf64_Word;
  21
  22 /* These constants are for the segment types stored in the image headers */
  23 #define PT_NULL    0
  24 #define PT_LOAD    1
  25 #define PT_DYNAMIC 2
  26 #define PT_INTERP  3
  27 #define PT_NOTE    4
  28 #define PT_SHLIB   5
  29 #define PT_PHDR    6
  30 #define PT_LOPROC  0x70000000
  31 #define PT_HIPROC  0x7fffffff
  32
  33 /* These constants define the different elf file types */
  34 #define ET_NONE   0
  35 #define ET_REL    1
  36 #define ET_EXEC   2
  37 #define ET_DYN    3
  38 #define ET_CORE   4
  39 #define ET_LOPROC 5
  40 #define ET_HIPROC 6
  41
  42 /* These constants define the various ELF target machines */
  43 #define EM_NONE  0
  44 #define EM_M32   1
  45 #define EM_SPARC 2
  46 #define EM_386   3
  47 #define EM_68K   4
  48 #define EM_88K   5
  49 #define EM_486   6   /* Perhaps disused */
  50 #define EM_860   7
  51
  52 #define EM_MIPS         8       /* MIPS R3000 (officially, big-endian only) */
  53
  54 #define EM_MIPS_RS4_BE 10       /* MIPS R4000 big-endian */
  55
  56 #define EM_PARISC      15       /* HPPA */
  57
  58 #define EM_SPARC32PLUS 18       /* Sun's "v8plus" */
  59
  60 #define EM_PPC         20       /* PowerPC */
  61
  62 #define EM_SPARCV9     43       /* SPARC v9 64-bit */
  63
  64 /*
  65  * This is an interim value that we will use until the committee comes
  66  * up with a final number.
  67  */
  68 #define EM_ALPHA        0x9026
  69
  70
  71 /* This is the info that is needed to parse the dynamic section of the file */
  72 #define DT_NULL         0
  73 #define DT_NEEDED       1
  74 #define DT_PLTRELSZ     2
  75 #define DT_PLTGOT       3
  76 #define DT_HASH         4
  77 #define DT_STRTAB       5
  78 #define DT_SYMTAB       6
  79 #define DT_RELA         7
  80 #define DT_RELASZ       8
  81 #define DT_RELAENT      9
  82 #define DT_STRSZ        10
  83 #define DT_SYMENT       11
  84 #define DT_INIT         12
  85 #define DT_FINI         13
  86 #define DT_SONAME       14
  87 #define DT_RPATH        15
  88 #define DT_SYMBOLIC     16
  89 #define DT_REL          17
  90 #define DT_RELSZ        18
  91 #define DT_RELENT       19
  92 #define DT_PLTREL       20
  93 #define DT_DEBUG        21
  94 #define DT_TEXTREL      22
  95 #define DT_JMPREL       23
  96 #define DT_LOPROC       0x70000000
  97 #define DT_HIPROC       0x7fffffff
  98
  99 /* This info is needed when parsing the symbol table */
 100 #define STB_LOCAL  0
 101 #define STB_GLOBAL 1
 102 #define STB_WEAK   2
 103
 104 #define STT_NOTYPE  0
 105 #define STT_OBJECT  1
 106 #define STT_FUNC    2
 107 #define STT_SECTION 3
 108 #define STT_FILE    4
 109
 110 #define ELF32_ST_BIND(x) ((x) >> 4)
 111 #define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf)
 112
 113 /* Symbolic values for the entries in the auxiliary table
 114    put on the initial stack */
 115 #define AT_NULL   0     /* end of vector */
 116 #define AT_IGNORE 1     /* entry should be ignored */
 117 #define AT_EXECFD 2     /* file descriptor of program */
 118 #define AT_PHDR   3     /* program headers for program */
 119 #define AT_PHENT  4     /* size of program header entry */
 120 #define AT_PHNUM  5     /* number of program headers */
 121 #define AT_PAGESZ 6     /* system page size */
 122 #define AT_BASE   7     /* base address of interpreter */
 123 #define AT_FLAGS  8     /* flags */
 124 #define AT_ENTRY  9     /* entry point of program */
 125 #define AT_NOTELF 10    /* program is not ELF */
 126 #define AT_UID    11    /* real uid */
 127 #define AT_EUID   12    /* effective uid */
 128 #define AT_GID    13    /* real gid */
 129 #define AT_EGID   14    /* effective gid */
 130 #define AT_PLATFORM 15  /* string identifying CPU for optimizations */
 131 #define AT_HWCAP  16    /* arch dependent hints at CPU capabilities */
 132
 133 typedef struct dynamic{
 134   Elf32_Sword d_tag;
 135   union{
 136     Elf32_Sword d_val;
 137     Elf32_Addr  d_ptr;
 138   } d_un;
 139 } Elf32_Dyn;
 140
 141 typedef struct {
 142   Elf64_Word d_tag;             /* entry tag value */
 143   union {
 144     Elf64_Word d_val;
 145     Elf64_Word d_ptr;
 146   } d_un;
 147 } Elf64_Dyn;
 148
 149 /* The following are used with relocations */
 150 #define ELF32_R_SYM(x) ((x) >> 8)
 151 #define ELF32_R_TYPE(x) ((x) & 0xff)
 152
 153 #define R_386_NONE      0
 154 #define R_386_32        1
 155 #define R_386_PC32      2
 156 #define R_386_GOT32     3
 157 #define R_386_PLT32     4
 158 #define R_386_COPY      5
 159 #define R_386_GLOB_DAT  6
 160 #define R_386_JMP_SLOT  7
 161 #define R_386_RELATIVE  8
 162 #define R_386_GOTOFF    9
 163 #define R_386_GOTPC     10
 164 #define R_386_NUM       11
 165
 166 /*
 167  * Sparc ELF relocation types
 168  */
 169 #define R_SPARC_NONE            0
 170 #define R_SPARC_8               1
 171 #define R_SPARC_16              2
 172 #define R_SPARC_32              3
 173 #define R_SPARC_DISP8           4
 174 #define R_SPARC_DISP16          5
 175 #define R_SPARC_DISP32          6
 176 #define R_SPARC_WDISP30         7
 177 #define R_SPARC_WDISP22         8
 178 #define R_SPARC_HI22            9
 179 #define R_SPARC_22              10
 180 #define R_SPARC_13              11
 181 #define R_SPARC_LO10            12
 182 #define R_SPARC_GOT10           13
 183 #define R_SPARC_GOT13           14
 184 #define R_SPARC_GOT22           15
 185 #define R_SPARC_PC10            16
 186 #define R_SPARC_PC22            17
 187 #define R_SPARC_WPLT30          18
 188 #define R_SPARC_COPY            19
 189 #define R_SPARC_GLOB_DAT        20
 190 #define R_SPARC_JMP_SLOT        21
 191 #define R_SPARC_RELATIVE        22
 192 #define R_SPARC_UA32            23
 193 #define R_SPARC_PLT32           24
 194 #define R_SPARC_HIPLT22         25
 195 #define R_SPARC_LOPLT10         26
 196 #define R_SPARC_PCPLT32         27
 197 #define R_SPARC_PCPLT22         28
 198 #define R_SPARC_PCPLT10         29
 199 #define R_SPARC_10              30
 200 #define R_SPARC_11              31
 201 #define R_SPARC_WDISP16         40
 202 #define R_SPARC_WDISP19         41
 203 #define R_SPARC_7               43
 204 #define R_SPARC_5               44
 205 #define R_SPARC_6               45
 206
 207 /* Bits present in AT_HWCAP, primarily for Sparc32.  */
 208
 209 #define HWCAP_SPARC_FLUSH       1    /* CPU supports flush instruction. */
 210 #define HWCAP_SPARC_STBAR       2
 211 #define HWCAP_SPARC_SWAP        4
 212 #define HWCAP_SPARC_MULDIV      8
 213 #define HWCAP_SPARC_V9          16
 214
 215
 216 /*
 217  * 68k ELF relocation types
 218  */
 219 #define R_68K_NONE      0
 220 #define R_68K_32        1
 221 #define R_68K_16        2
 222 #define R_68K_8         3
 223 #define R_68K_PC32      4
 224 #define R_68K_PC16      5
 225 #define R_68K_PC8       6
 226 #define R_68K_GOT32     7
 227 #define R_68K_GOT16     8
 228 #define R_68K_GOT8      9
 229 #define R_68K_GOT32O    10
 230 #define R_68K_GOT16O    11
 231 #define R_68K_GOT8O     12
 232 #define R_68K_PLT32     13
 233 #define R_68K_PLT16     14
 234 #define R_68K_PLT8      15
 235 #define R_68K_PLT32O    16
 236 #define R_68K_PLT16O    17
 237 #define R_68K_PLT8O     18
 238 #define R_68K_COPY      19
 239 #define R_68K_GLOB_DAT  20
 240 #define R_68K_JMP_SLOT  21
 241 #define R_68K_RELATIVE  22
 242
 243 /*
 244  * Alpha ELF relocation types
 245  */
 246 #define R_ALPHA_NONE            0       /* No reloc */
 247 #define R_ALPHA_REFLONG         1       /* Direct 32 bit */
 248 #define R_ALPHA_REFQUAD         2       /* Direct 64 bit */
 249 #define R_ALPHA_GPREL32         3       /* GP relative 32 bit */
 250 #define R_ALPHA_LITERAL         4       /* GP relative 16 bit w/optimization */
 251 #define R_ALPHA_LITUSE          5       /* Optimization hint for LITERAL */
 252 #define R_ALPHA_GPDISP          6       /* Add displacement to GP */
 253 #define R_ALPHA_BRADDR          7       /* PC+4 relative 23 bit shifted */
 254 #define R_ALPHA_HINT            8       /* PC+4 relative 16 bit shifted */
 255 #define R_ALPHA_SREL16          9       /* PC relative 16 bit */
 256 #define R_ALPHA_SREL32          10      /* PC relative 32 bit */
 257 #define R_ALPHA_SREL64          11      /* PC relative 64 bit */
 258 #define R_ALPHA_OP_PUSH         12      /* OP stack push */
 259 #define R_ALPHA_OP_STORE        13      /* OP stack pop and store */
 260 #define R_ALPHA_OP_PSUB         14      /* OP stack subtract */
 261 #define R_ALPHA_OP_PRSHIFT      15      /* OP stack right shift */
 262 #define R_ALPHA_GPVALUE         16
 263 #define R_ALPHA_GPRELHIGH       17
 264 #define R_ALPHA_GPRELLOW        18
 265 #define R_ALPHA_IMMED_GP_16     19
 266 #define R_ALPHA_IMMED_GP_HI32   20
 267 #define R_ALPHA_IMMED_SCN_HI32  21
 268 #define R_ALPHA_IMMED_BR_HI32   22
 269 #define R_ALPHA_IMMED_LO32      23
 270 #define R_ALPHA_COPY            24      /* Copy symbol at runtime */
 271 #define R_ALPHA_GLOB_DAT        25      /* Create GOT entry */
 272 #define R_ALPHA_JMP_SLOT        26      /* Create PLT entry */
 273 #define R_ALPHA_RELATIVE        27      /* Adjust by program base */
 274
 275 /* Legal values for e_flags field of Elf64_Ehdr.  */
 276
 277 #define EF_ALPHA_32BIT          1       /* All addresses are below 2GB */
 278
 279
 280 typedef struct elf32_rel {
 281   Elf32_Addr    r_offset;
 282   Elf32_Word    r_info;
 283 } Elf32_Rel;
 284
 285 typedef struct elf64_rel {
 286   Elf64_Addr r_offset;  /* Location at which to apply the action */
 287   Elf64_Word r_info;    /* index and type of relocation */
 288 } Elf64_Rel;
 289
 290 typedef struct elf32_rela{
 291   Elf32_Addr    r_offset;
 292   Elf32_Word    r_info;
 293   Elf32_Sword   r_addend;
 294 } Elf32_Rela;
 295
 296 typedef struct elf64_rela {
 297   Elf64_Addr r_offset;  /* Location at which to apply the action */
 298   Elf64_Word r_info;    /* index and type of relocation */
 299   Elf64_Word r_addend;  /* Constant addend used to compute value */
 300 } Elf64_Rela;
 301
 302 typedef struct elf32_sym{
 303   Elf32_Word    st_name;
 304   Elf32_Addr    st_value;
 305   Elf32_Word    st_size;
 306   unsigned char st_info;
 307   unsigned char st_other;
 308   Elf32_Half    st_shndx;
 309 } Elf32_Sym;
 310
 311 typedef struct elf64_sym {
 312   Elf32_Word st_name;           /* Symbol name, index in string tbl (yes, Elf32) */
 313   unsigned char st_info;        /* Type and binding attributes */
 314   unsigned char st_other;       /* No defined meaning, 0 */
 315   Elf64_Half st_shndx;          /* Associated section index */
 316   Elf64_Addr st_value;          /* Value of the symbol */
 317   Elf64_Word st_size;           /* Associated symbol size */
 318 } Elf64_Sym;
 319
 320
 321 #define EI_NIDENT       16
 322
 323 typedef struct elf32_hdr{
 324   unsigned char e_ident[EI_NIDENT];
 325   Elf32_Half    e_type;
 326   Elf32_Half    e_machine;
 327   Elf32_Word    e_version;
 328   Elf32_Addr    e_entry;  /* Entry point */
 329   Elf32_Off     e_phoff;
 330   Elf32_Off     e_shoff;
 331   Elf32_Word    e_flags;
 332   Elf32_Half    e_ehsize;
 333   Elf32_Half    e_phentsize;
 334   Elf32_Half    e_phnum;
 335   Elf32_Half    e_shentsize;
 336   Elf32_Half    e_shnum;
 337   Elf32_Half    e_shstrndx;
 338 } Elf32_Ehdr;
 339
 340 typedef struct elf64_hdr {
 341   unsigned char e_ident[16];            /* ELF "magic number" */
 342   Elf64_SHalf e_type;
 343   Elf64_Half e_machine;
 344   __s32 e_version;
 345   Elf64_Addr e_entry;           /* Entry point virtual address */
 346   Elf64_Off e_phoff;            /* Program header table file offset */
 347   Elf64_Off e_shoff;            /* Section header table file offset */
 348   __s32 e_flags;
 349   Elf64_SHalf e_ehsize;
 350   Elf64_SHalf e_phentsize;
 351   Elf64_SHalf e_phnum;
 352   Elf64_SHalf e_shentsize;
 353   Elf64_SHalf e_shnum;
 354   Elf64_SHalf e_shstrndx;
 355 } Elf64_Ehdr;
 356
 357 /* These constants define the permissions on sections in the program
 358    header, p_flags. */
 359 #define PF_R            0x4
 360 #define PF_W            0x2
 361 #define PF_X            0x1
 362
 363 typedef struct elf32_phdr{
 364   Elf32_Word    p_type;
 365   Elf32_Off     p_offset;
 366   Elf32_Addr    p_vaddr;
 367   Elf32_Addr    p_paddr;
 368   Elf32_Word    p_filesz;
 369   Elf32_Word    p_memsz;
 370   Elf32_Word    p_flags;
 371   Elf32_Word    p_align;
 372 } Elf32_Phdr;
 373
 374 typedef struct elf64_phdr {
 375   __s32 p_type;
 376   __s32 p_flags;
 377   Elf64_Off p_offset;           /* Segment file offset */
 378   Elf64_Addr p_vaddr;           /* Segment virtual address */
 379   Elf64_Addr p_paddr;           /* Segment physical address */
 380   Elf64_Word p_filesz;          /* Segment size in file */
 381   Elf64_Word p_memsz;           /* Segment size in memory */
 382   Elf64_Word p_align;           /* Segment alignment, file & memory */
 383 } Elf64_Phdr;
 384
 385 /* sh_type */
 386 #define SHT_NULL        0
 387 #define SHT_PROGBITS    1
 388 #define SHT_SYMTAB      2
 389 #define SHT_STRTAB      3
 390 #define SHT_RELA        4
 391 #define SHT_HASH        5
 392 #define SHT_DYNAMIC     6
 393 #define SHT_NOTE        7
 394 #define SHT_NOBITS      8
 395 #define SHT_REL         9
 396 #define SHT_SHLIB       10
 397 #define SHT_DYNSYM      11
 398 #define SHT_NUM         12
 399 #define SHT_LOPROC      0x70000000
 400 #define SHT_HIPROC      0x7fffffff
 401 #define SHT_LOUSER      0x80000000
 402 #define SHT_HIUSER      0xffffffff
 403
 404 /* sh_flags */
 405 #define SHF_WRITE       0x1
 406 #define SHF_ALLOC       0x2
 407 #define SHF_EXECINSTR   0x4
 408 #define SHF_MASKPROC    0xf0000000
 409
 410 /* special section indexes */
 411 #define SHN_UNDEF       0
 412 #define SHN_LORESERVE   0xff00
 413 #define SHN_LOPROC      0xff00
 414 #define SHN_HIPROC      0xff1f
 415 #define SHN_ABS         0xfff1
 416 #define SHN_COMMON      0xfff2
 417 #define SHN_HIRESERVE   0xffff
 418
 419 typedef struct {
 420   Elf32_Word    sh_name;
 421   Elf32_Word    sh_type;
 422   Elf32_Word    sh_flags;
 423   Elf32_Addr    sh_addr;
 424   Elf32_Off     sh_offset;
 425   Elf32_Word    sh_size;
 426   Elf32_Word    sh_link;
 427   Elf32_Word    sh_info;
 428   Elf32_Word    sh_addralign;
 429   Elf32_Word    sh_entsize;
 430 } Elf32_Shdr;
 431
 432 typedef struct elf64_shdr {
 433   Elf32_Word sh_name;           /* Section name, index in string tbl (yes Elf32) */
 434   Elf32_Word sh_type;           /* Type of section (yes Elf32) */
 435   Elf64_Word sh_flags;          /* Miscellaneous section attributes */
 436   Elf64_Addr sh_addr;           /* Section virtual addr at execution */
 437   Elf64_Off sh_offset;          /* Section file offset */
 438   Elf64_Word sh_size;           /* Size of section in bytes */
 439   Elf32_Word sh_link;           /* Index of another section (yes Elf32) */
 440   Elf32_Word sh_info;           /* Additional section information (yes Elf32) */
 441   Elf64_Word sh_addralign;      /* Section alignment */
 442   Elf64_Word sh_entsize;        /* Entry size if section holds table */
 443 } Elf64_Shdr;
 444
 445 #define EI_MAG0         0               /* e_ident[] indexes */
 446 #define EI_MAG1         1
 447 #define EI_MAG2         2
 448 #define EI_MAG3         3
 449 #define EI_CLASS        4
 450 #define EI_DATA         5
 451 #define EI_VERSION      6
 452 #define EI_PAD          7
 453
 454 #define ELFMAG0         0x7f            /* EI_MAG */
 455 #define ELFMAG1         'E'
 456 #define ELFMAG2         'L'
 457 #define ELFMAG3         'F'
 458 #define ELFMAG          "\177ELF"
 459 #define SELFMAG         4
 460
 461 #define ELFCLASSNONE    0               /* EI_CLASS */
 462 #define ELFCLASS32      1
 463 #define ELFCLASS64      2
 464 #define ELFCLASSNUM     3
 465
 466 #define ELFDATANONE     0               /* e_ident[EI_DATA] */
 467 #define ELFDATA2LSB     1
 468 #define ELFDATA2MSB     2
 469
 470 #define EV_NONE         0               /* e_version, EI_VERSION */
 471 #define EV_CURRENT      1
 472 #define EV_NUM          2
 473
 474 /* Notes used in ET_CORE */
 475 #define NT_PRSTATUS     1
 476 #define NT_PRFPREG      2
 477 #define NT_PRPSINFO     3
 478 #define NT_TASKSTRUCT   4
 479
 480 /* Note header in a PT_NOTE section */
 481 typedef struct elf32_note {
 482   Elf32_Word    n_namesz;       /* Name size */
 483   Elf32_Word    n_descsz;       /* Content size */
 484   Elf32_Word    n_type;         /* Content type */
 485 } Elf32_Nhdr;
 486
 487 /* Note header in a PT_NOTE section */
 488 /*
 489  * For now we use the 32 bit version of the structure until we figure
 490  * out whether we need anything better.  Note - on the Alpha, "unsigned int"
 491  * is only 32 bits.
 492  */
 493 typedef struct elf64_note {
 494   Elf32_Word n_namesz;  /* Name size */
 495   Elf32_Word n_descsz;  /* Content size */
 496   Elf32_Word n_type;    /* Content type */
 497 } Elf64_Nhdr;
 498
 499 #if ELF_CLASS == ELFCLASS32
 500
 501 extern Elf32_Dyn _DYNAMIC [];
 502 #define elfhdr          elf32_hdr
 503 #define elf_phdr        elf32_phdr
 504 #define elf_note        elf32_note
 505
 506 #else
 507
 508 extern Elf64_Dyn _DYNAMIC [];
 509 #define elfhdr          elf64_hdr
 510 #define elf_phdr        elf64_phdr
 511 #define elf_note        elf64_note
 512
 513 #endif
 514
 515
 516 #endif /* _LINUX_ELF_H */