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 __s32   Elf64_Sword;
  20 typedef __u32   Elf64_Word;
  21 typedef __u64   Elf64_Xword;
  22 typedef __s64   Elf64_Sxword;
  23
  24 /* These constants are for the segment types stored in the image headers */
  25 #define PT_NULL    0
  26 #define PT_LOAD    1
  27 #define PT_DYNAMIC 2
  28 #define PT_INTERP  3
  29 #define PT_NOTE    4
  30 #define PT_SHLIB   5
  31 #define PT_PHDR    6
  32 #define PT_LOOS    0x60000000
  33 #define PT_HIOS    0x6fffffff
  34 #define PT_LOPROC  0x70000000
  35 #define PT_HIPROC  0x7fffffff
  36 #define PT_GNU_EH_FRAME         0x6474e550
  37
  38 #define PT_GNU_STACK    (PT_LOOS + 0x474e551)
  39
  40 /* These constants define the different elf file types */
  41 #define ET_NONE   0
  42 #define ET_REL    1
  43 #define ET_EXEC   2
  44 #define ET_DYN    3
  45 #define ET_CORE   4
  46 #define ET_LOPROC 0xff00
  47 #define ET_HIPROC 0xffff
  48
  49 /* These constants define the various ELF target machines */
  50 #define EM_NONE  0
  51 #define EM_M32   1
  52 #define EM_SPARC 2
  53 #define EM_386   3
  54 #define EM_68K   4
  55 #define EM_88K   5
  56 #define EM_486   6   /* Perhaps disused */
  57 #define EM_860   7
  58
  59 #define EM_MIPS         8       /* MIPS R3000 (officially, big-endian only) */
  60
  61 #define EM_MIPS_RS4_BE 10       /* MIPS R4000 big-endian */
  62
  63 #define EM_PARISC      15       /* HPPA */
  64
  65 #define EM_SPARC32PLUS 18       /* Sun's "v8plus" */
  66
  67 #define EM_PPC         20       /* PowerPC */
  68 #define EM_PPC64       21       /* PowerPC64 */
  69
  70 #define EM_SH          42       /* SuperH */
  71
  72 #define EM_SPARCV9     43       /* SPARC v9 64-bit */
  73
  74 #define EM_IA_64        50      /* HP/Intel IA-64 */
  75
  76 #define EM_X86_64       62      /* AMD x86-64 */
  77
  78 #define EM_S390         22      /* IBM S/390 */
  79
  80 #define EM_CRIS         76      /* Axis Communications 32-bit embedded processor */
  81
  82 #define EM_V850         87      /* NEC v850 */
  83
  84 #define EM_H8_300H      47      /* Hitachi H8/300H */
  85 #define EM_H8S          48      /* Hitachi H8S     */
  86
  87 /*
  88  * This is an interim value that we will use until the committee comes
  89  * up with a final number.
  90  */
  91 #define EM_ALPHA        0x9026
  92
  93 /* Bogus old v850 magic number, used by old tools.  */
  94 #define EM_CYGNUS_V850  0x9080
  95
  96 /*
  97  * This is the old interim value for S/390 architecture
  98  */
  99 #define EM_S390_OLD     0xA390
 100
 101 /* This is the info that is needed to parse the dynamic section of the file */
 102 #define DT_NULL         0
 103 #define DT_NEEDED       1
 104 #define DT_PLTRELSZ     2
 105 #define DT_PLTGOT       3
 106 #define DT_HASH         4
 107 #define DT_STRTAB       5
 108 #define DT_SYMTAB       6
 109 #define DT_RELA         7
 110 #define DT_RELASZ       8
 111 #define DT_RELAENT      9
 112 #define DT_STRSZ        10
 113 #define DT_SYMENT       11
 114 #define DT_INIT         12
 115 #define DT_FINI         13
 116 #define DT_SONAME       14
 117 #define DT_RPATH        15
 118 #define DT_SYMBOLIC     16
 119 #define DT_REL          17
 120 #define DT_RELSZ        18
 121 #define DT_RELENT       19
 122 #define DT_PLTREL       20
 123 #define DT_DEBUG        21
 124 #define DT_TEXTREL      22
 125 #define DT_JMPREL       23
 126 #define DT_LOPROC       0x70000000
 127 #define DT_HIPROC       0x7fffffff
 128
 129 /* This info is needed when parsing the symbol table */
 130 #define STB_LOCAL  0
 131 #define STB_GLOBAL 1
 132 #define STB_WEAK   2
 133
 134 #define STT_NOTYPE  0
 135 #define STT_OBJECT  1
 136 #define STT_FUNC    2
 137 #define STT_SECTION 3
 138 #define STT_FILE    4
 139
 140 #define ELF_ST_BIND(x)          ((x) >> 4)
 141 #define ELF_ST_TYPE(x)          (((unsigned int) x) & 0xf)
 142 #define ELF32_ST_BIND(x)        ELF_ST_BIND(x)
 143 #define ELF32_ST_TYPE(x)        ELF_ST_TYPE(x)
 144 #define ELF64_ST_BIND(x)        ELF_ST_BIND(x)
 145 #define ELF64_ST_TYPE(x)        ELF_ST_TYPE(x)
 146
 147 /* Symbolic values for the entries in the auxiliary table
 148    put on the initial stack */
 149 #define AT_NULL   0     /* end of vector */
 150 #define AT_IGNORE 1     /* entry should be ignored */
 151 #define AT_EXECFD 2     /* file descriptor of program */
 152 #define AT_PHDR   3     /* program headers for program */
 153 #define AT_PHENT  4     /* size of program header entry */
 154 #define AT_PHNUM  5     /* number of program headers */
 155 #define AT_PAGESZ 6     /* system page size */
 156 #define AT_BASE   7     /* base address of interpreter */
 157 #define AT_FLAGS  8     /* flags */
 158 #define AT_ENTRY  9     /* entry point of program */
 159 #define AT_NOTELF 10    /* program is not ELF */
 160 #define AT_UID    11    /* real uid */
 161 #define AT_EUID   12    /* effective uid */
 162 #define AT_GID    13    /* real gid */
 163 #define AT_EGID   14    /* effective gid */
 164 #define AT_PLATFORM 15  /* string identifying CPU for optimizations */
 165 #define AT_HWCAP  16    /* arch dependent hints at CPU capabilities */
 166 #define AT_CLKTCK 17    /* frequency at which times() increments */
 167
 168 #define AT_SECURE 23   /* secure mode boolean */
 169
 170 typedef struct dynamic{
 171   Elf32_Sword d_tag;
 172   union{
 173     Elf32_Sword d_val;
 174     Elf32_Addr  d_ptr;
 175   } d_un;
 176 } Elf32_Dyn;
 177
 178 typedef struct {
 179   Elf64_Sxword d_tag;           /* entry tag value */
 180   union {
 181     Elf64_Xword d_val;
 182     Elf64_Addr d_ptr;
 183   } d_un;
 184 } Elf64_Dyn;
 185
 186 /* The following are used with relocations */
 187 #define ELF32_R_SYM(x) ((x) >> 8)
 188 #define ELF32_R_TYPE(x) ((x) & 0xff)
 189
 190 #define ELF64_R_SYM(i)                  ((i) >> 32)
 191 #define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
 192
 193 typedef struct elf32_rel {
 194   Elf32_Addr    r_offset;
 195   Elf32_Word    r_info;
 196 } Elf32_Rel;
 197
 198 typedef struct elf64_rel {
 199   Elf64_Addr r_offset;  /* Location at which to apply the action */
 200   Elf64_Xword r_info;   /* index and type of relocation */
 201 } Elf64_Rel;
 202
 203 typedef struct elf32_rela{
 204   Elf32_Addr    r_offset;
 205   Elf32_Word    r_info;
 206   Elf32_Sword   r_addend;
 207 } Elf32_Rela;
 208
 209 typedef struct elf64_rela {
 210   Elf64_Addr r_offset;  /* Location at which to apply the action */
 211   Elf64_Xword r_info;   /* index and type of relocation */
 212   Elf64_Sxword r_addend;        /* Constant addend used to compute value */
 213 } Elf64_Rela;
 214
 215 typedef struct elf32_sym{
 216   Elf32_Word    st_name;
 217   Elf32_Addr    st_value;
 218   Elf32_Word    st_size;
 219   unsigned char st_info;
 220   unsigned char st_other;
 221   Elf32_Half    st_shndx;
 222 } Elf32_Sym;
 223
 224 typedef struct elf64_sym {
 225   Elf64_Word st_name;           /* Symbol name, index in string tbl */
 226   unsigned char st_info;        /* Type and binding attributes */
 227   unsigned char st_other;       /* No defined meaning, 0 */
 228   Elf64_Half st_shndx;          /* Associated section index */
 229   Elf64_Addr st_value;          /* Value of the symbol */
 230   Elf64_Xword st_size;          /* Associated symbol size */
 231 } Elf64_Sym;
 232
 233
 234 #define EI_NIDENT       16
 235
 236 typedef struct elf32_hdr{
 237   unsigned char e_ident[EI_NIDENT];
 238   Elf32_Half    e_type;
 239   Elf32_Half    e_machine;
 240   Elf32_Word    e_version;
 241   Elf32_Addr    e_entry;  /* Entry point */
 242   Elf32_Off     e_phoff;
 243   Elf32_Off     e_shoff;
 244   Elf32_Word    e_flags;
 245   Elf32_Half    e_ehsize;
 246   Elf32_Half    e_phentsize;
 247   Elf32_Half    e_phnum;
 248   Elf32_Half    e_shentsize;
 249   Elf32_Half    e_shnum;
 250   Elf32_Half    e_shstrndx;
 251 } Elf32_Ehdr;
 252
 253 typedef struct elf64_hdr {
 254   unsigned char e_ident[16];            /* ELF "magic number" */
 255   Elf64_Half e_type;
 256   Elf64_Half e_machine;
 257   Elf64_Word e_version;
 258   Elf64_Addr e_entry;           /* Entry point virtual address */
 259   Elf64_Off e_phoff;            /* Program header table file offset */
 260   Elf64_Off e_shoff;            /* Section header table file offset */
 261   Elf64_Word e_flags;
 262   Elf64_Half e_ehsize;
 263   Elf64_Half e_phentsize;
 264   Elf64_Half e_phnum;
 265   Elf64_Half e_shentsize;
 266   Elf64_Half e_shnum;
 267   Elf64_Half e_shstrndx;
 268 } Elf64_Ehdr;
 269
 270 /* These constants define the permissions on sections in the program
 271    header, p_flags. */
 272 #define PF_R            0x4
 273 #define PF_W            0x2
 274 #define PF_X            0x1
 275
 276 typedef struct elf32_phdr{
 277   Elf32_Word    p_type;
 278   Elf32_Off     p_offset;
 279   Elf32_Addr    p_vaddr;
 280   Elf32_Addr    p_paddr;
 281   Elf32_Word    p_filesz;
 282   Elf32_Word    p_memsz;
 283   Elf32_Word    p_flags;
 284   Elf32_Word    p_align;
 285 } Elf32_Phdr;
 286
 287 typedef struct elf64_phdr {
 288   Elf64_Word p_type;
 289   Elf64_Word p_flags;
 290   Elf64_Off p_offset;           /* Segment file offset */
 291   Elf64_Addr p_vaddr;           /* Segment virtual address */
 292   Elf64_Addr p_paddr;           /* Segment physical address */
 293   Elf64_Xword p_filesz;         /* Segment size in file */
 294   Elf64_Xword p_memsz;          /* Segment size in memory */
 295   Elf64_Xword p_align;          /* Segment alignment, file & memory */
 296 } Elf64_Phdr;
 297
 298 /* sh_type */
 299 #define SHT_NULL        0
 300 #define SHT_PROGBITS    1
 301 #define SHT_SYMTAB      2
 302 #define SHT_STRTAB      3
 303 #define SHT_RELA        4
 304 #define SHT_HASH        5
 305 #define SHT_DYNAMIC     6
 306 #define SHT_NOTE        7
 307 #define SHT_NOBITS      8
 308 #define SHT_REL         9
 309 #define SHT_SHLIB       10
 310 #define SHT_DYNSYM      11
 311 #define SHT_NUM         12
 312 #define SHT_LOPROC      0x70000000
 313 #define SHT_HIPROC      0x7fffffff
 314 #define SHT_LOUSER      0x80000000
 315 #define SHT_HIUSER      0xffffffff
 316
 317 /* sh_flags */
 318 #define SHF_WRITE       0x1
 319 #define SHF_ALLOC       0x2
 320 #define SHF_EXECINSTR   0x4
 321 #define SHF_MASKPROC    0xf0000000
 322
 323 /* special section indexes */
 324 #define SHN_UNDEF       0
 325 #define SHN_LORESERVE   0xff00
 326 #define SHN_LOPROC      0xff00
 327 #define SHN_HIPROC      0xff1f
 328 #define SHN_ABS         0xfff1
 329 #define SHN_COMMON      0xfff2
 330 #define SHN_HIRESERVE   0xffff
 331
 332 typedef struct {
 333   Elf32_Word    sh_name;
 334   Elf32_Word    sh_type;
 335   Elf32_Word    sh_flags;
 336   Elf32_Addr    sh_addr;
 337   Elf32_Off     sh_offset;
 338   Elf32_Word    sh_size;
 339   Elf32_Word    sh_link;
 340   Elf32_Word    sh_info;
 341   Elf32_Word    sh_addralign;
 342   Elf32_Word    sh_entsize;
 343 } Elf32_Shdr;
 344
 345 typedef struct elf64_shdr {
 346   Elf64_Word sh_name;           /* Section name, index in string tbl */
 347   Elf64_Word sh_type;           /* Type of section */
 348   Elf64_Xword sh_flags;         /* Miscellaneous section attributes */
 349   Elf64_Addr sh_addr;           /* Section virtual addr at execution */
 350   Elf64_Off sh_offset;          /* Section file offset */
 351   Elf64_Xword sh_size;          /* Size of section in bytes */
 352   Elf64_Word sh_link;           /* Index of another section */
 353   Elf64_Word sh_info;           /* Additional section information */
 354   Elf64_Xword sh_addralign;     /* Section alignment */
 355   Elf64_Xword sh_entsize;       /* Entry size if section holds table */
 356 } Elf64_Shdr;
 357
 358 #define EI_MAG0         0               /* e_ident[] indexes */
 359 #define EI_MAG1         1
 360 #define EI_MAG2         2
 361 #define EI_MAG3         3
 362 #define EI_CLASS        4
 363 #define EI_DATA         5
 364 #define EI_VERSION      6
 365 #define EI_OSABI        7
 366 #define EI_PAD          8
 367
 368 #define ELFMAG0         0x7f            /* EI_MAG */
 369 #define ELFMAG1         'E'
 370 #define ELFMAG2         'L'
 371 #define ELFMAG3         'F'
 372 #define ELFMAG          "\177ELF"
 373 #define SELFMAG         4
 374
 375 #define ELFCLASSNONE    0               /* EI_CLASS */
 376 #define ELFCLASS32      1
 377 #define ELFCLASS64      2
 378 #define ELFCLASSNUM     3
 379
 380 #define ELFDATANONE     0               /* e_ident[EI_DATA] */
 381 #define ELFDATA2LSB     1
 382 #define ELFDATA2MSB     2
 383
 384 #define EV_NONE         0               /* e_version, EI_VERSION */
 385 #define EV_CURRENT      1
 386 #define EV_NUM          2
 387
 388 #define ELFOSABI_NONE   0
 389 #define ELFOSABI_LINUX  3
 390
 391 #ifndef ELF_OSABI
 392 #define ELF_OSABI ELFOSABI_NONE
 393 #endif
 394
 395 /* Notes used in ET_CORE */
 396 #define NT_PRSTATUS     1
 397 #define NT_PRFPREG      2
 398 #define NT_PRPSINFO     3
 399 #define NT_TASKSTRUCT   4
 400 #define NT_AUXV         6
 401 #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
 402
 403
 404 /* Note header in a PT_NOTE section */
 405 typedef struct elf32_note {
 406   Elf32_Word    n_namesz;       /* Name size */
 407   Elf32_Word    n_descsz;       /* Content size */
 408   Elf32_Word    n_type;         /* Content type */
 409 } Elf32_Nhdr;
 410
 411 /* Note header in a PT_NOTE section */
 412 typedef struct elf64_note {
 413   Elf64_Word n_namesz;  /* Name size */
 414   Elf64_Word n_descsz;  /* Content size */
 415   Elf64_Word n_type;    /* Content type */
 416 } Elf64_Nhdr;
 417
 418 #if ELF_CLASS == ELFCLASS32
 419
 420 extern Elf32_Dyn _DYNAMIC [];
 421 #define elfhdr          elf32_hdr
 422 #define elf_phdr        elf32_phdr
 423 #define elf_note        elf32_note
 424
 425 #else
 426
 427 extern Elf64_Dyn _DYNAMIC [];
 428 #define elfhdr          elf64_hdr
 429 #define elf_phdr        elf64_phdr
 430 #define elf_note        elf64_note
 431
 432 #endif
 433
 434
 435 #endif /* _LINUX_ELF_H */