include/linux/elf.h

   1 #ifndef _LINUX_ELF_H
   2 #define _LINUX_ELF_H
   3
   4 #include <linux/types.h>
   5 #include <linux/auxvec.h>
   6 #include <asm/elf.h>
   7
   8 #ifndef elf_read_implies_exec
   9   /* Executables for which elf_read_implies_exec() returns TRUE will
  10      have the READ_IMPLIES_EXEC personality flag set automatically.
  11      Override in asm/elf.h as needed.  */
  12 # define elf_read_implies_exec(ex, have_pt_gnu_stack)   0
  13 #endif
  14
  15 /* 32-bit ELF base types. */
  16 typedef __u32   Elf32_Addr;
  17 typedef __u16   Elf32_Half;
  18 typedef __u32   Elf32_Off;
  19 typedef __s32   Elf32_Sword;
  20 typedef __u32   Elf32_Word;
  21
  22 /* 64-bit ELF base types. */
  23 typedef __u64   Elf64_Addr;
  24 typedef __u16   Elf64_Half;
  25 typedef __s16   Elf64_SHalf;
  26 typedef __u64   Elf64_Off;
  27 typedef __s32   Elf64_Sword;
  28 typedef __u32   Elf64_Word;
  29 typedef __u64   Elf64_Xword;
  30 typedef __s64   Elf64_Sxword;
  31
  32 /* These constants are for the segment types stored in the image headers */
  33 #define PT_NULL    0
  34 #define PT_LOAD    1
  35 #define PT_DYNAMIC 2
  36 #define PT_INTERP  3
  37 #define PT_NOTE    4
  38 #define PT_SHLIB   5
  39 #define PT_PHDR    6
  40 #define PT_TLS     7               /* Thread local storage segment */
  41 #define PT_LOOS    0x60000000      /* OS-specific */
  42 #define PT_HIOS    0x6fffffff      /* OS-specific */
  43 #define PT_LOPROC  0x70000000
  44 #define PT_HIPROC  0x7fffffff
  45 #define PT_GNU_EH_FRAME         0x6474e550
  46
  47 #define PT_GNU_STACK    (PT_LOOS + 0x474e551)
  48
  49 /* These constants define the different elf file types */
  50 #define ET_NONE   0
  51 #define ET_REL    1
  52 #define ET_EXEC   2
  53 #define ET_DYN    3
  54 #define ET_CORE   4
  55 #define ET_LOPROC 0xff00
  56 #define ET_HIPROC 0xffff
  57
  58 /* These constants define the various ELF target machines */
  59 #define EM_NONE  0
  60 #define EM_M32   1
  61 #define EM_SPARC 2
  62 #define EM_386   3
  63 #define EM_68K   4
  64 #define EM_88K   5
  65 #define EM_486   6   /* Perhaps disused */
  66 #define EM_860   7
  67
  68 #define EM_MIPS         8       /* MIPS R3000 (officially, big-endian only) */
  69
  70 #define EM_MIPS_RS4_BE 10       /* MIPS R4000 big-endian */
  71
  72 #define EM_PARISC      15       /* HPPA */
  73
  74 #define EM_SPARC32PLUS 18       /* Sun's "v8plus" */
  75
  76 #define EM_PPC         20       /* PowerPC */
  77 #define EM_PPC64       21       /* PowerPC64 */
  78
  79 #define EM_SH          42       /* SuperH */
  80
  81 #define EM_SPARCV9     43       /* SPARC v9 64-bit */
  82
  83 #define EM_IA_64        50      /* HP/Intel IA-64 */
  84
  85 #define EM_X86_64       62      /* AMD x86-64 */
  86
  87 #define EM_S390         22      /* IBM S/390 */
  88
  89 #define EM_CRIS         76      /* Axis Communications 32-bit embedded processor */
  90
  91 #define EM_V850         87      /* NEC v850 */
  92
  93 #define EM_M32R         88      /* Renesas M32R */
  94
  95 #define EM_H8_300       46      /* Renesas H8/300,300H,H8S */
  96
  97 /*
  98  * This is an interim value that we will use until the committee comes
  99  * up with a final number.
 100  */
 101 #define EM_ALPHA        0x9026
 102
 103 /* Bogus old v850 magic number, used by old tools.  */
 104 #define EM_CYGNUS_V850  0x9080
 105
 106 /* Bogus old m32r magic number, used by old tools.  */
 107 #define EM_CYGNUS_M32R  0x9041
 108
 109 /*
 110  * This is the old interim value for S/390 architecture
 111  */
 112 #define EM_S390_OLD     0xA390
 113
 114 #define EM_FRV          0x5441          /* Fujitsu FR-V */
 115
 116 /* This is the info that is needed to parse the dynamic section of the file */
 117 #define DT_NULL         0
 118 #define DT_NEEDED       1
 119 #define DT_PLTRELSZ     2
 120 #define DT_PLTGOT       3
 121 #define DT_HASH         4
 122 #define DT_STRTAB       5
 123 #define DT_SYMTAB       6
 124 #define DT_RELA         7
 125 #define DT_RELASZ       8
 126 #define DT_RELAENT      9
 127 #define DT_STRSZ        10
 128 #define DT_SYMENT       11
 129 #define DT_INIT         12
 130 #define DT_FINI         13
 131 #define DT_SONAME       14
 132 #define DT_RPATH        15
 133 #define DT_SYMBOLIC     16
 134 #define DT_REL          17
 135 #define DT_RELSZ        18
 136 #define DT_RELENT       19
 137 #define DT_PLTREL       20
 138 #define DT_DEBUG        21
 139 #define DT_TEXTREL      22
 140 #define DT_JMPREL       23
 141 #define DT_LOPROC       0x70000000
 142 #define DT_HIPROC       0x7fffffff
 143
 144 /* This info is needed when parsing the symbol table */
 145 #define STB_LOCAL  0
 146 #define STB_GLOBAL 1
 147 #define STB_WEAK   2
 148
 149 #define STT_NOTYPE  0
 150 #define STT_OBJECT  1
 151 #define STT_FUNC    2
 152 #define STT_SECTION 3
 153 #define STT_FILE    4
 154 #define STT_COMMON  5
 155 #define STT_TLS     6
 156
 157 #define ELF_ST_BIND(x)          ((x) >> 4)
 158 #define ELF_ST_TYPE(x)          (((unsigned int) x) & 0xf)
 159 #define ELF32_ST_BIND(x)        ELF_ST_BIND(x)
 160 #define ELF32_ST_TYPE(x)        ELF_ST_TYPE(x)
 161 #define ELF64_ST_BIND(x)        ELF_ST_BIND(x)
 162 #define ELF64_ST_TYPE(x)        ELF_ST_TYPE(x)
 163
 164 typedef struct dynamic{
 165   Elf32_Sword d_tag;
 166   union{
 167     Elf32_Sword d_val;
 168     Elf32_Addr  d_ptr;
 169   } d_un;
 170 } Elf32_Dyn;
 171
 172 typedef struct {
 173   Elf64_Sxword d_tag;           /* entry tag value */
 174   union {
 175     Elf64_Xword d_val;
 176     Elf64_Addr d_ptr;
 177   } d_un;
 178 } Elf64_Dyn;
 179
 180 /* The following are used with relocations */
 181 #define ELF32_R_SYM(x) ((x) >> 8)
 182 #define ELF32_R_TYPE(x) ((x) & 0xff)
 183
 184 #define ELF64_R_SYM(i)                  ((i) >> 32)
 185 #define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
 186
 187 typedef struct elf32_rel {
 188   Elf32_Addr    r_offset;
 189   Elf32_Word    r_info;
 190 } Elf32_Rel;
 191
 192 typedef struct elf64_rel {
 193   Elf64_Addr r_offset;  /* Location at which to apply the action */
 194   Elf64_Xword r_info;   /* index and type of relocation */
 195 } Elf64_Rel;
 196
 197 typedef struct elf32_rela{
 198   Elf32_Addr    r_offset;
 199   Elf32_Word    r_info;
 200   Elf32_Sword   r_addend;
 201 } Elf32_Rela;
 202
 203 typedef struct elf64_rela {
 204   Elf64_Addr r_offset;  /* Location at which to apply the action */
 205   Elf64_Xword r_info;   /* index and type of relocation */
 206   Elf64_Sxword r_addend;        /* Constant addend used to compute value */
 207 } Elf64_Rela;
 208
 209 typedef struct elf32_sym{
 210   Elf32_Word    st_name;
 211   Elf32_Addr    st_value;
 212   Elf32_Word    st_size;
 213   unsigned char st_info;
 214   unsigned char st_other;
 215   Elf32_Half    st_shndx;
 216 } Elf32_Sym;
 217
 218 typedef struct elf64_sym {
 219   Elf64_Word st_name;           /* Symbol name, index in string tbl */
 220   unsigned char st_info;        /* Type and binding attributes */
 221   unsigned char st_other;       /* No defined meaning, 0 */
 222   Elf64_Half st_shndx;          /* Associated section index */
 223   Elf64_Addr st_value;          /* Value of the symbol */
 224   Elf64_Xword st_size;          /* Associated symbol size */
 225 } Elf64_Sym;
 226
 227
 228 #define EI_NIDENT       16
 229
 230 typedef struct elf32_hdr{
 231   unsigned char e_ident[EI_NIDENT];
 232   Elf32_Half    e_type;
 233   Elf32_Half    e_machine;
 234   Elf32_Word    e_version;
 235   Elf32_Addr    e_entry;  /* Entry point */
 236   Elf32_Off     e_phoff;
 237   Elf32_Off     e_shoff;
 238   Elf32_Word    e_flags;
 239   Elf32_Half    e_ehsize;
 240   Elf32_Half    e_phentsize;
 241   Elf32_Half    e_phnum;
 242   Elf32_Half    e_shentsize;
 243   Elf32_Half    e_shnum;
 244   Elf32_Half    e_shstrndx;
 245 } Elf32_Ehdr;
 246
 247 typedef struct elf64_hdr {
 248   unsigned char e_ident[16];            /* ELF "magic number" */
 249   Elf64_Half e_type;
 250   Elf64_Half e_machine;
 251   Elf64_Word e_version;
 252   Elf64_Addr e_entry;           /* Entry point virtual address */
 253   Elf64_Off e_phoff;            /* Program header table file offset */
 254   Elf64_Off e_shoff;            /* Section header table file offset */
 255   Elf64_Word e_flags;
 256   Elf64_Half e_ehsize;
 257   Elf64_Half e_phentsize;
 258   Elf64_Half e_phnum;
 259   Elf64_Half e_shentsize;
 260   Elf64_Half e_shnum;
 261   Elf64_Half e_shstrndx;
 262 } Elf64_Ehdr;
 263
 264 /* These constants define the permissions on sections in the program
 265    header, p_flags. */
 266 #define PF_R            0x4
 267 #define PF_W            0x2
 268 #define PF_X            0x1
 269
 270 typedef struct elf32_phdr{
 271   Elf32_Word    p_type;
 272   Elf32_Off     p_offset;
 273   Elf32_Addr    p_vaddr;
 274   Elf32_Addr    p_paddr;
 275   Elf32_Word    p_filesz;
 276   Elf32_Word    p_memsz;
 277   Elf32_Word    p_flags;
 278   Elf32_Word    p_align;
 279 } Elf32_Phdr;
 280
 281 typedef struct elf64_phdr {
 282   Elf64_Word p_type;
 283   Elf64_Word p_flags;
 284   Elf64_Off p_offset;           /* Segment file offset */
 285   Elf64_Addr p_vaddr;           /* Segment virtual address */
 286   Elf64_Addr p_paddr;           /* Segment physical address */
 287   Elf64_Xword p_filesz;         /* Segment size in file */
 288   Elf64_Xword p_memsz;          /* Segment size in memory */
 289   Elf64_Xword p_align;          /* Segment alignment, file & memory */
 290 } Elf64_Phdr;
 291
 292 /* sh_type */
 293 #define SHT_NULL        0
 294 #define SHT_PROGBITS    1
 295 #define SHT_SYMTAB      2
 296 #define SHT_STRTAB      3
 297 #define SHT_RELA        4
 298 #define SHT_HASH        5
 299 #define SHT_DYNAMIC     6
 300 #define SHT_NOTE        7
 301 #define SHT_NOBITS      8
 302 #define SHT_REL         9
 303 #define SHT_SHLIB       10
 304 #define SHT_DYNSYM      11
 305 #define SHT_NUM         12
 306 #define SHT_LOPROC      0x70000000
 307 #define SHT_HIPROC      0x7fffffff
 308 #define SHT_LOUSER      0x80000000
 309 #define SHT_HIUSER      0xffffffff
 310
 311 /* sh_flags */
 312 #define SHF_WRITE       0x1
 313 #define SHF_ALLOC       0x2
 314 #define SHF_EXECINSTR   0x4
 315 #define SHF_MASKPROC    0xf0000000
 316
 317 /* special section indexes */
 318 #define SHN_UNDEF       0
 319 #define SHN_LORESERVE   0xff00
 320 #define SHN_LOPROC      0xff00
 321 #define SHN_HIPROC      0xff1f
 322 #define SHN_ABS         0xfff1
 323 #define SHN_COMMON      0xfff2
 324 #define SHN_HIRESERVE   0xffff
 325
 326 typedef struct {
 327   Elf32_Word    sh_name;
 328   Elf32_Word    sh_type;
 329   Elf32_Word    sh_flags;
 330   Elf32_Addr    sh_addr;
 331   Elf32_Off     sh_offset;
 332   Elf32_Word    sh_size;
 333   Elf32_Word    sh_link;
 334   Elf32_Word    sh_info;
 335   Elf32_Word    sh_addralign;
 336   Elf32_Word    sh_entsize;
 337 } Elf32_Shdr;
 338
 339 typedef struct elf64_shdr {
 340   Elf64_Word sh_name;           /* Section name, index in string tbl */
 341   Elf64_Word sh_type;           /* Type of section */
 342   Elf64_Xword sh_flags;         /* Miscellaneous section attributes */
 343   Elf64_Addr sh_addr;           /* Section virtual addr at execution */
 344   Elf64_Off sh_offset;          /* Section file offset */
 345   Elf64_Xword sh_size;          /* Size of section in bytes */
 346   Elf64_Word sh_link;           /* Index of another section */
 347   Elf64_Word sh_info;           /* Additional section information */
 348   Elf64_Xword sh_addralign;     /* Section alignment */
 349   Elf64_Xword sh_entsize;       /* Entry size if section holds table */
 350 } Elf64_Shdr;
 351
 352 #define EI_MAG0         0               /* e_ident[] indexes */
 353 #define EI_MAG1         1
 354 #define EI_MAG2         2
 355 #define EI_MAG3         3
 356 #define EI_CLASS        4
 357 #define EI_DATA         5
 358 #define EI_VERSION      6
 359 #define EI_OSABI        7
 360 #define EI_PAD          8
 361
 362 #define ELFMAG0         0x7f            /* EI_MAG */
 363 #define ELFMAG1         'E'
 364 #define ELFMAG2         'L'
 365 #define ELFMAG3         'F'
 366 #define ELFMAG          "\177ELF"
 367 #define SELFMAG         4
 368
 369 #define ELFCLASSNONE    0               /* EI_CLASS */
 370 #define ELFCLASS32      1
 371 #define ELFCLASS64      2
 372 #define ELFCLASSNUM     3
 373
 374 #define ELFDATANONE     0               /* e_ident[EI_DATA] */
 375 #define ELFDATA2LSB     1
 376 #define ELFDATA2MSB     2
 377
 378 #define EV_NONE         0               /* e_version, EI_VERSION */
 379 #define EV_CURRENT      1
 380 #define EV_NUM          2
 381
 382 #define ELFOSABI_NONE   0
 383 #define ELFOSABI_LINUX  3
 384
 385 #ifndef ELF_OSABI
 386 #define ELF_OSABI ELFOSABI_NONE
 387 #endif
 388
 389 /* Notes used in ET_CORE */
 390 #define NT_PRSTATUS     1
 391 #define NT_PRFPREG      2
 392 #define NT_PRPSINFO     3
 393 #define NT_TASKSTRUCT   4
 394 #define NT_AUXV         6
 395 #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
 396
 397
 398 /* Note header in a PT_NOTE section */
 399 typedef struct elf32_note {
 400   Elf32_Word    n_namesz;       /* Name size */
 401   Elf32_Word    n_descsz;       /* Content size */
 402   Elf32_Word    n_type;         /* Content type */
 403 } Elf32_Nhdr;
 404
 405 /* Note header in a PT_NOTE section */
 406 typedef struct elf64_note {
 407   Elf64_Word n_namesz;  /* Name size */
 408   Elf64_Word n_descsz;  /* Content size */
 409   Elf64_Word n_type;    /* Content type */
 410 } Elf64_Nhdr;
 411
 412 #if ELF_CLASS == ELFCLASS32
 413
 414 extern Elf32_Dyn _DYNAMIC [];
 415 #define elfhdr          elf32_hdr
 416 #define elf_phdr        elf32_phdr
 417 #define elf_note        elf32_note
 418
 419 #else
 420
 421 extern Elf64_Dyn _DYNAMIC [];
 422 #define elfhdr          elf64_hdr
 423 #define elf_phdr        elf64_phdr
 424 #define elf_note        elf64_note
 425
 426 #endif
 427
 428
 429 #endif /* _LINUX_ELF_H */