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 #ifndef elf_read_implies_exec
   8   /* Executables for which elf_read_implies_exec() returns TRUE will
   9      have the READ_IMPLIES_EXEC personality flag set automatically.
  10      Override in asm/elf.h as needed.  */
  11 # define elf_read_implies_exec(ex, have_pt_gnu_stack)   0
  12 #endif
  13
  14 /* 32-bit ELF base types. */
  15 typedef __u32   Elf32_Addr;
  16 typedef __u16   Elf32_Half;
  17 typedef __u32   Elf32_Off;
  18 typedef __s32   Elf32_Sword;
  19 typedef __u32   Elf32_Word;
  20
  21 /* 64-bit ELF base types. */
  22 typedef __u64   Elf64_Addr;
  23 typedef __u16   Elf64_Half;
  24 typedef __s16   Elf64_SHalf;
  25 typedef __u64   Elf64_Off;
  26 typedef __s32   Elf64_Sword;
  27 typedef __u32   Elf64_Word;
  28 typedef __u64   Elf64_Xword;
  29 typedef __s64   Elf64_Sxword;
  30
  31 /* These constants are for the segment types stored in the image headers */
  32 #define PT_NULL    0
  33 #define PT_LOAD    1
  34 #define PT_DYNAMIC 2
  35 #define PT_INTERP  3
  36 #define PT_NOTE    4
  37 #define PT_SHLIB   5
  38 #define PT_PHDR    6
  39 #define PT_TLS     7               /* Thread local storage segment */
  40 #define PT_LOOS    0x60000000      /* OS-specific */
  41 #define PT_HIOS    0x6fffffff      /* OS-specific */
  42 #define PT_LOPROC  0x70000000
  43 #define PT_HIPROC  0x7fffffff
  44 #define PT_GNU_EH_FRAME         0x6474e550
  45
  46 #define PT_GNU_STACK    (PT_LOOS + 0x474e551)
  47
  48 /* These constants define the different elf file types */
  49 #define ET_NONE   0
  50 #define ET_REL    1
  51 #define ET_EXEC   2
  52 #define ET_DYN    3
  53 #define ET_CORE   4
  54 #define ET_LOPROC 0xff00
  55 #define ET_HIPROC 0xffff
  56
  57 /* These constants define the various ELF target machines */
  58 #define EM_NONE  0
  59 #define EM_M32   1
  60 #define EM_SPARC 2
  61 #define EM_386   3
  62 #define EM_68K   4
  63 #define EM_88K   5
  64 #define EM_486   6   /* Perhaps disused */
  65 #define EM_860   7
  66
  67 #define EM_MIPS         8       /* MIPS R3000 (officially, big-endian only) */
  68
  69 #define EM_MIPS_RS4_BE 10       /* MIPS R4000 big-endian */
  70
  71 #define EM_PARISC      15       /* HPPA */
  72
  73 #define EM_SPARC32PLUS 18       /* Sun's "v8plus" */
  74
  75 #define EM_PPC         20       /* PowerPC */
  76 #define EM_PPC64       21       /* PowerPC64 */
  77
  78 #define EM_SH          42       /* SuperH */
  79
  80 #define EM_SPARCV9     43       /* SPARC v9 64-bit */
  81
  82 #define EM_IA_64        50      /* HP/Intel IA-64 */
  83
  84 #define EM_X86_64       62      /* AMD x86-64 */
  85
  86 #define EM_S390         22      /* IBM S/390 */
  87
  88 #define EM_CRIS         76      /* Axis Communications 32-bit embedded processor */
  89
  90 #define EM_V850         87      /* NEC v850 */
  91
  92 #define EM_M32R         88      /* Renesas M32R */
  93
  94 #define EM_H8_300       46      /* Renesas H8/300,300H,H8S */
  95
  96 /*
  97  * This is an interim value that we will use until the committee comes
  98  * up with a final number.
  99  */
 100 #define EM_ALPHA        0x9026
 101
 102 /* Bogus old v850 magic number, used by old tools.  */
 103 #define EM_CYGNUS_V850  0x9080
 104
 105 /* Bogus old m32r magic number, used by old tools.  */
 106 #define EM_CYGNUS_M32R  0x9041
 107
 108 /*
 109  * This is the old interim value for S/390 architecture
 110  */
 111 #define EM_S390_OLD     0xA390
 112
 113 #define EM_FRV          0x5441          /* Fujitsu FR-V */
 114
 115 /* This is the info that is needed to parse the dynamic section of the file */
 116 #define DT_NULL         0
 117 #define DT_NEEDED       1
 118 #define DT_PLTRELSZ     2
 119 #define DT_PLTGOT       3
 120 #define DT_HASH         4
 121 #define DT_STRTAB       5
 122 #define DT_SYMTAB       6
 123 #define DT_RELA         7
 124 #define DT_RELASZ       8
 125 #define DT_RELAENT      9
 126 #define DT_STRSZ        10
 127 #define DT_SYMENT       11
 128 #define DT_INIT         12
 129 #define DT_FINI         13
 130 #define DT_SONAME       14
 131 #define DT_RPATH        15
 132 #define DT_SYMBOLIC     16
 133 #define DT_REL          17
 134 #define DT_RELSZ        18
 135 #define DT_RELENT       19
 136 #define DT_PLTREL       20
 137 #define DT_DEBUG        21
 138 #define DT_TEXTREL      22
 139 #define DT_JMPREL       23
 140 #define DT_LOPROC       0x70000000
 141 #define DT_HIPROC       0x7fffffff
 142
 143 /* This info is needed when parsing the symbol table */
 144 #define STB_LOCAL  0
 145 #define STB_GLOBAL 1
 146 #define STB_WEAK   2
 147
 148 #define STT_NOTYPE  0
 149 #define STT_OBJECT  1
 150 #define STT_FUNC    2
 151 #define STT_SECTION 3
 152 #define STT_FILE    4
 153
 154 #define ELF_ST_BIND(x)          ((x) >> 4)
 155 #define ELF_ST_TYPE(x)          (((unsigned int) x) & 0xf)
 156 #define ELF32_ST_BIND(x)        ELF_ST_BIND(x)
 157 #define ELF32_ST_TYPE(x)        ELF_ST_TYPE(x)
 158 #define ELF64_ST_BIND(x)        ELF_ST_BIND(x)
 159 #define ELF64_ST_TYPE(x)        ELF_ST_TYPE(x)
 160
 161 /* Symbolic values for the entries in the auxiliary table
 162    put on the initial stack */
 163 #define AT_NULL   0     /* end of vector */
 164 #define AT_IGNORE 1     /* entry should be ignored */
 165 #define AT_EXECFD 2     /* file descriptor of program */
 166 #define AT_PHDR   3     /* program headers for program */
 167 #define AT_PHENT  4     /* size of program header entry */
 168 #define AT_PHNUM  5     /* number of program headers */
 169 #define AT_PAGESZ 6     /* system page size */
 170 #define AT_BASE   7     /* base address of interpreter */
 171 #define AT_FLAGS  8     /* flags */
 172 #define AT_ENTRY  9     /* entry point of program */
 173 #define AT_NOTELF 10    /* program is not ELF */
 174 #define AT_UID    11    /* real uid */
 175 #define AT_EUID   12    /* effective uid */
 176 #define AT_GID    13    /* real gid */
 177 #define AT_EGID   14    /* effective gid */
 178 #define AT_PLATFORM 15  /* string identifying CPU for optimizations */
 179 #define AT_HWCAP  16    /* arch dependent hints at CPU capabilities */
 180 #define AT_CLKTCK 17    /* frequency at which times() increments */
 181
 182 #define AT_SECURE 23   /* secure mode boolean */
 183
 184 typedef struct dynamic{
 185   Elf32_Sword d_tag;
 186   union{
 187     Elf32_Sword d_val;
 188     Elf32_Addr  d_ptr;
 189   } d_un;
 190 } Elf32_Dyn;
 191
 192 typedef struct {
 193   Elf64_Sxword d_tag;           /* entry tag value */
 194   union {
 195     Elf64_Xword d_val;
 196     Elf64_Addr d_ptr;
 197   } d_un;
 198 } Elf64_Dyn;
 199
 200 /* The following are used with relocations */
 201 #define ELF32_R_SYM(x) ((x) >> 8)
 202 #define ELF32_R_TYPE(x) ((x) & 0xff)
 203
 204 #define ELF64_R_SYM(i)                  ((i) >> 32)
 205 #define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
 206
 207 typedef struct elf32_rel {
 208   Elf32_Addr    r_offset;
 209   Elf32_Word    r_info;
 210 } Elf32_Rel;
 211
 212 typedef struct elf64_rel {
 213   Elf64_Addr r_offset;  /* Location at which to apply the action */
 214   Elf64_Xword r_info;   /* index and type of relocation */
 215 } Elf64_Rel;
 216
 217 typedef struct elf32_rela{
 218   Elf32_Addr    r_offset;
 219   Elf32_Word    r_info;
 220   Elf32_Sword   r_addend;
 221 } Elf32_Rela;
 222
 223 typedef struct elf64_rela {
 224   Elf64_Addr r_offset;  /* Location at which to apply the action */
 225   Elf64_Xword r_info;   /* index and type of relocation */
 226   Elf64_Sxword r_addend;        /* Constant addend used to compute value */
 227 } Elf64_Rela;
 228
 229 typedef struct elf32_sym{
 230   Elf32_Word    st_name;
 231   Elf32_Addr    st_value;
 232   Elf32_Word    st_size;
 233   unsigned char st_info;
 234   unsigned char st_other;
 235   Elf32_Half    st_shndx;
 236 } Elf32_Sym;
 237
 238 typedef struct elf64_sym {
 239   Elf64_Word st_name;           /* Symbol name, index in string tbl */
 240   unsigned char st_info;        /* Type and binding attributes */
 241   unsigned char st_other;       /* No defined meaning, 0 */
 242   Elf64_Half st_shndx;          /* Associated section index */
 243   Elf64_Addr st_value;          /* Value of the symbol */
 244   Elf64_Xword st_size;          /* Associated symbol size */
 245 } Elf64_Sym;
 246
 247
 248 #define EI_NIDENT       16
 249
 250 typedef struct elf32_hdr{
 251   unsigned char e_ident[EI_NIDENT];
 252   Elf32_Half    e_type;
 253   Elf32_Half    e_machine;
 254   Elf32_Word    e_version;
 255   Elf32_Addr    e_entry;  /* Entry point */
 256   Elf32_Off     e_phoff;
 257   Elf32_Off     e_shoff;
 258   Elf32_Word    e_flags;
 259   Elf32_Half    e_ehsize;
 260   Elf32_Half    e_phentsize;
 261   Elf32_Half    e_phnum;
 262   Elf32_Half    e_shentsize;
 263   Elf32_Half    e_shnum;
 264   Elf32_Half    e_shstrndx;
 265 } Elf32_Ehdr;
 266
 267 typedef struct elf64_hdr {
 268   unsigned char e_ident[16];            /* ELF "magic number" */
 269   Elf64_Half e_type;
 270   Elf64_Half e_machine;
 271   Elf64_Word e_version;
 272   Elf64_Addr e_entry;           /* Entry point virtual address */
 273   Elf64_Off e_phoff;            /* Program header table file offset */
 274   Elf64_Off e_shoff;            /* Section header table file offset */
 275   Elf64_Word e_flags;
 276   Elf64_Half e_ehsize;
 277   Elf64_Half e_phentsize;
 278   Elf64_Half e_phnum;
 279   Elf64_Half e_shentsize;
 280   Elf64_Half e_shnum;
 281   Elf64_Half e_shstrndx;
 282 } Elf64_Ehdr;
 283
 284 /* These constants define the permissions on sections in the program
 285    header, p_flags. */
 286 #define PF_R            0x4
 287 #define PF_W            0x2
 288 #define PF_X            0x1
 289
 290 typedef struct elf32_phdr{
 291   Elf32_Word    p_type;
 292   Elf32_Off     p_offset;
 293   Elf32_Addr    p_vaddr;
 294   Elf32_Addr    p_paddr;
 295   Elf32_Word    p_filesz;
 296   Elf32_Word    p_memsz;
 297   Elf32_Word    p_flags;
 298   Elf32_Word    p_align;
 299 } Elf32_Phdr;
 300
 301 typedef struct elf64_phdr {
 302   Elf64_Word p_type;
 303   Elf64_Word p_flags;
 304   Elf64_Off p_offset;           /* Segment file offset */
 305   Elf64_Addr p_vaddr;           /* Segment virtual address */
 306   Elf64_Addr p_paddr;           /* Segment physical address */
 307   Elf64_Xword p_filesz;         /* Segment size in file */
 308   Elf64_Xword p_memsz;          /* Segment size in memory */
 309   Elf64_Xword p_align;          /* Segment alignment, file & memory */
 310 } Elf64_Phdr;
 311
 312 /* sh_type */
 313 #define SHT_NULL        0
 314 #define SHT_PROGBITS    1
 315 #define SHT_SYMTAB      2
 316 #define SHT_STRTAB      3
 317 #define SHT_RELA        4
 318 #define SHT_HASH        5
 319 #define SHT_DYNAMIC     6
 320 #define SHT_NOTE        7
 321 #define SHT_NOBITS      8
 322 #define SHT_REL         9
 323 #define SHT_SHLIB       10
 324 #define SHT_DYNSYM      11
 325 #define SHT_NUM         12
 326 #define SHT_LOPROC      0x70000000
 327 #define SHT_HIPROC      0x7fffffff
 328 #define SHT_LOUSER      0x80000000
 329 #define SHT_HIUSER      0xffffffff
 330
 331 /* sh_flags */
 332 #define SHF_WRITE       0x1
 333 #define SHF_ALLOC       0x2
 334 #define SHF_EXECINSTR   0x4
 335 #define SHF_MASKPROC    0xf0000000
 336
 337 /* special section indexes */
 338 #define SHN_UNDEF       0
 339 #define SHN_LORESERVE   0xff00
 340 #define SHN_LOPROC      0xff00
 341 #define SHN_HIPROC      0xff1f
 342 #define SHN_ABS         0xfff1
 343 #define SHN_COMMON      0xfff2
 344 #define SHN_HIRESERVE   0xffff
 345
 346 typedef struct {
 347   Elf32_Word    sh_name;
 348   Elf32_Word    sh_type;
 349   Elf32_Word    sh_flags;
 350   Elf32_Addr    sh_addr;
 351   Elf32_Off     sh_offset;
 352   Elf32_Word    sh_size;
 353   Elf32_Word    sh_link;
 354   Elf32_Word    sh_info;
 355   Elf32_Word    sh_addralign;
 356   Elf32_Word    sh_entsize;
 357 } Elf32_Shdr;
 358
 359 typedef struct elf64_shdr {
 360   Elf64_Word sh_name;           /* Section name, index in string tbl */
 361   Elf64_Word sh_type;           /* Type of section */
 362   Elf64_Xword sh_flags;         /* Miscellaneous section attributes */
 363   Elf64_Addr sh_addr;           /* Section virtual addr at execution */
 364   Elf64_Off sh_offset;          /* Section file offset */
 365   Elf64_Xword sh_size;          /* Size of section in bytes */
 366   Elf64_Word sh_link;           /* Index of another section */
 367   Elf64_Word sh_info;           /* Additional section information */
 368   Elf64_Xword sh_addralign;     /* Section alignment */
 369   Elf64_Xword sh_entsize;       /* Entry size if section holds table */
 370 } Elf64_Shdr;
 371
 372 #define EI_MAG0         0               /* e_ident[] indexes */
 373 #define EI_MAG1         1
 374 #define EI_MAG2         2
 375 #define EI_MAG3         3
 376 #define EI_CLASS        4
 377 #define EI_DATA         5
 378 #define EI_VERSION      6
 379 #define EI_OSABI        7
 380 #define EI_PAD          8
 381
 382 #define ELFMAG0         0x7f            /* EI_MAG */
 383 #define ELFMAG1         'E'
 384 #define ELFMAG2         'L'
 385 #define ELFMAG3         'F'
 386 #define ELFMAG          "\177ELF"
 387 #define SELFMAG         4
 388
 389 #define ELFCLASSNONE    0               /* EI_CLASS */
 390 #define ELFCLASS32      1
 391 #define ELFCLASS64      2
 392 #define ELFCLASSNUM     3
 393
 394 #define ELFDATANONE     0               /* e_ident[EI_DATA] */
 395 #define ELFDATA2LSB     1
 396 #define ELFDATA2MSB     2
 397
 398 #define EV_NONE         0               /* e_version, EI_VERSION */
 399 #define EV_CURRENT      1
 400 #define EV_NUM          2
 401
 402 #define ELFOSABI_NONE   0
 403 #define ELFOSABI_LINUX  3
 404
 405 #ifndef ELF_OSABI
 406 #define ELF_OSABI ELFOSABI_NONE
 407 #endif
 408
 409 /* Notes used in ET_CORE */
 410 #define NT_PRSTATUS     1
 411 #define NT_PRFPREG      2
 412 #define NT_PRPSINFO     3
 413 #define NT_TASKSTRUCT   4
 414 #define NT_AUXV         6
 415 #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
 416
 417
 418 /* Note header in a PT_NOTE section */
 419 typedef struct elf32_note {
 420   Elf32_Word    n_namesz;       /* Name size */
 421   Elf32_Word    n_descsz;       /* Content size */
 422   Elf32_Word    n_type;         /* Content type */
 423 } Elf32_Nhdr;
 424
 425 /* Note header in a PT_NOTE section */
 426 typedef struct elf64_note {
 427   Elf64_Word n_namesz;  /* Name size */
 428   Elf64_Word n_descsz;  /* Content size */
 429   Elf64_Word n_type;    /* Content type */
 430 } Elf64_Nhdr;
 431
 432 #if ELF_CLASS == ELFCLASS32
 433
 434 extern Elf32_Dyn _DYNAMIC [];
 435 #define elfhdr          elf32_hdr
 436 #define elf_phdr        elf32_phdr
 437 #define elf_note        elf32_note
 438
 439 #else
 440
 441 extern Elf64_Dyn _DYNAMIC [];
 442 #define elfhdr          elf64_hdr
 443 #define elf_phdr        elf64_phdr
 444 #define elf_note        elf64_note
 445
 446 #endif
 447
 448
 449 #endif /* _LINUX_ELF_H */