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 #define PT_MIPS_REGINFO         0x70000000
  33
  34 /* Flags in the e_flags field of the header */
  35 #define EF_MIPS_NOREORDER 0x00000001
  36 #define EF_MIPS_PIC       0x00000002
  37 #define EF_MIPS_CPIC      0x00000004
  38 #define EF_MIPS_ARCH      0xf0000000
  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
  69 #define EM_SH          42       /* SuperH */
  70
  71 #define EM_SPARCV9     43       /* SPARC v9 64-bit */
  72
  73 #define EM_IA_64        50      /* HP/Intel IA-64 */
  74
  75 /*
  76  * This is an interim value that we will use until the committee comes
  77  * up with a final number.
  78  */
  79 #define EM_ALPHA        0x9026
  80
  81
  82 /* This is the info that is needed to parse the dynamic section of the file */
  83 #define DT_NULL         0
  84 #define DT_NEEDED       1
  85 #define DT_PLTRELSZ     2
  86 #define DT_PLTGOT       3
  87 #define DT_HASH         4
  88 #define DT_STRTAB       5
  89 #define DT_SYMTAB       6
  90 #define DT_RELA         7
  91 #define DT_RELASZ       8
  92 #define DT_RELAENT      9
  93 #define DT_STRSZ        10
  94 #define DT_SYMENT       11
  95 #define DT_INIT         12
  96 #define DT_FINI         13
  97 #define DT_SONAME       14
  98 #define DT_RPATH        15
  99 #define DT_SYMBOLIC     16
 100 #define DT_REL          17
 101 #define DT_RELSZ        18
 102 #define DT_RELENT       19
 103 #define DT_PLTREL       20
 104 #define DT_DEBUG        21
 105 #define DT_TEXTREL      22
 106 #define DT_JMPREL       23
 107 #define DT_LOPROC       0x70000000
 108 #define DT_HIPROC       0x7fffffff
 109 #define DT_MIPS_RLD_VERSION     0x70000001
 110 #define DT_MIPS_TIME_STAMP      0x70000002
 111 #define DT_MIPS_ICHECKSUM       0x70000003
 112 #define DT_MIPS_IVERSION        0x70000004
 113 #define DT_MIPS_FLAGS           0x70000005
 114   #define RHF_NONE                0
 115   #define RHF_HARDWAY             1
 116   #define RHF_NOTPOT              2
 117 #define DT_MIPS_BASE_ADDRESS    0x70000006
 118 #define DT_MIPS_CONFLICT        0x70000008
 119 #define DT_MIPS_LIBLIST         0x70000009
 120 #define DT_MIPS_LOCAL_GOTNO     0x7000000a
 121 #define DT_MIPS_CONFLICTNO      0x7000000b
 122 #define DT_MIPS_LIBLISTNO       0x70000010
 123 #define DT_MIPS_SYMTABNO        0x70000011
 124 #define DT_MIPS_UNREFEXTNO      0x70000012
 125 #define DT_MIPS_GOTSYM          0x70000013
 126 #define DT_MIPS_HIPAGENO        0x70000014
 127 #define DT_MIPS_RLD_MAP         0x70000016
 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 ELF32_ST_BIND(x) ((x) >> 4)
 141 #define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf)
 142
 143 /* Symbolic values for the entries in the auxiliary table
 144    put on the initial stack */
 145 #define AT_NULL   0     /* end of vector */
 146 #define AT_IGNORE 1     /* entry should be ignored */
 147 #define AT_EXECFD 2     /* file descriptor of program */
 148 #define AT_PHDR   3     /* program headers for program */
 149 #define AT_PHENT  4     /* size of program header entry */
 150 #define AT_PHNUM  5     /* number of program headers */
 151 #define AT_PAGESZ 6     /* system page size */
 152 #define AT_BASE   7     /* base address of interpreter */
 153 #define AT_FLAGS  8     /* flags */
 154 #define AT_ENTRY  9     /* entry point of program */
 155 #define AT_NOTELF 10    /* program is not ELF */
 156 #define AT_UID    11    /* real uid */
 157 #define AT_EUID   12    /* effective uid */
 158 #define AT_GID    13    /* real gid */
 159 #define AT_EGID   14    /* effective gid */
 160 #define AT_PLATFORM 15  /* string identifying CPU for optimizations */
 161 #define AT_HWCAP  16    /* arch dependent hints at CPU capabilities */
 162
 163 typedef struct dynamic{
 164   Elf32_Sword d_tag;
 165   union{
 166     Elf32_Sword d_val;
 167     Elf32_Addr  d_ptr;
 168   } d_un;
 169 } Elf32_Dyn;
 170
 171 typedef struct {
 172   Elf64_Word d_tag;             /* entry tag value */
 173   union {
 174     Elf64_Word d_val;
 175     Elf64_Word d_ptr;
 176   } d_un;
 177 } Elf64_Dyn;
 178
 179 /* The following are used with relocations */
 180 #define ELF32_R_SYM(x) ((x) >> 8)
 181 #define ELF32_R_TYPE(x) ((x) & 0xff)
 182
 183 #define R_386_NONE      0
 184 #define R_386_32        1
 185 #define R_386_PC32      2
 186 #define R_386_GOT32     3
 187 #define R_386_PLT32     4
 188 #define R_386_COPY      5
 189 #define R_386_GLOB_DAT  6
 190 #define R_386_JMP_SLOT  7
 191 #define R_386_RELATIVE  8
 192 #define R_386_GOTOFF    9
 193 #define R_386_GOTPC     10
 194 #define R_386_NUM       11
 195
 196 #define R_MIPS_NONE             0
 197 #define R_MIPS_16               1
 198 #define R_MIPS_32               2
 199 #define R_MIPS_REL32            3
 200 #define R_MIPS_26               4
 201 #define R_MIPS_HI16             5
 202 #define R_MIPS_LO16             6
 203 #define R_MIPS_GPREL16          7
 204 #define R_MIPS_LITERAL          8
 205 #define R_MIPS_GOT16            9
 206 #define R_MIPS_PC16             10
 207 #define R_MIPS_CALL16           11
 208 #define R_MIPS_GPREL32          12
 209 /* The remaining relocs are defined on Irix, although they are not
 210    in the MIPS ELF ABI.  */
 211 #define R_MIPS_UNUSED1          13
 212 #define R_MIPS_UNUSED2          14
 213 #define R_MIPS_UNUSED3          15
 214 #define R_MIPS_SHIFT5           16
 215 #define R_MIPS_SHIFT6           17
 216 #define R_MIPS_64               18
 217 #define R_MIPS_GOT_DISP         19
 218 #define R_MIPS_GOT_PAGE         20
 219 #define R_MIPS_GOT_OFST         21
 220 /*
 221  * The following two relocation types are specified in the the MIPS ABI
 222  * conformance guide version 1.2 but not yet in the psABI.
 223  */
 224 #define R_MIPS_GOTHI16          22
 225 #define R_MIPS_GOTLO16          23
 226 #define R_MIPS_SUB              24
 227 #define R_MIPS_INSERT_A         25
 228 #define R_MIPS_INSERT_B         26
 229 #define R_MIPS_DELETE           27
 230 #define R_MIPS_HIGHER           28
 231 #define R_MIPS_HIGHEST          29
 232 /*
 233  * The following two relocation types are specified in the the MIPS ABI
 234  * conformance guide version 1.2 but not yet in the psABI.
 235  */
 236 #define R_MIPS_CALLHI16         30
 237 #define R_MIPS_CALLLO16         31
 238 /*
 239  * This range is reserved for vendor specific relocations.
 240  */
 241 #define R_MIPS_LOVENDOR         100
 242 #define R_MIPS_HIVENDOR         127
 243
 244
 245 /*
 246  * Sparc ELF relocation types
 247  */
 248 #define R_SPARC_NONE            0
 249 #define R_SPARC_8               1
 250 #define R_SPARC_16              2
 251 #define R_SPARC_32              3
 252 #define R_SPARC_DISP8           4
 253 #define R_SPARC_DISP16          5
 254 #define R_SPARC_DISP32          6
 255 #define R_SPARC_WDISP30         7
 256 #define R_SPARC_WDISP22         8
 257 #define R_SPARC_HI22            9
 258 #define R_SPARC_22              10
 259 #define R_SPARC_13              11
 260 #define R_SPARC_LO10            12
 261 #define R_SPARC_GOT10           13
 262 #define R_SPARC_GOT13           14
 263 #define R_SPARC_GOT22           15
 264 #define R_SPARC_PC10            16
 265 #define R_SPARC_PC22            17
 266 #define R_SPARC_WPLT30          18
 267 #define R_SPARC_COPY            19
 268 #define R_SPARC_GLOB_DAT        20
 269 #define R_SPARC_JMP_SLOT        21
 270 #define R_SPARC_RELATIVE        22
 271 #define R_SPARC_UA32            23
 272 #define R_SPARC_PLT32           24
 273 #define R_SPARC_HIPLT22         25
 274 #define R_SPARC_LOPLT10         26
 275 #define R_SPARC_PCPLT32         27
 276 #define R_SPARC_PCPLT22         28
 277 #define R_SPARC_PCPLT10         29
 278 #define R_SPARC_10              30
 279 #define R_SPARC_11              31
 280 #define R_SPARC_WDISP16         40
 281 #define R_SPARC_WDISP19         41
 282 #define R_SPARC_7               43
 283 #define R_SPARC_5               44
 284 #define R_SPARC_6               45
 285
 286 /* Bits present in AT_HWCAP, primarily for Sparc32.  */
 287
 288 #define HWCAP_SPARC_FLUSH       1    /* CPU supports flush instruction. */
 289 #define HWCAP_SPARC_STBAR       2
 290 #define HWCAP_SPARC_SWAP        4
 291 #define HWCAP_SPARC_MULDIV      8
 292 #define HWCAP_SPARC_V9          16
 293
 294
 295 /*
 296  * 68k ELF relocation types
 297  */
 298 #define R_68K_NONE      0
 299 #define R_68K_32        1
 300 #define R_68K_16        2
 301 #define R_68K_8         3
 302 #define R_68K_PC32      4
 303 #define R_68K_PC16      5
 304 #define R_68K_PC8       6
 305 #define R_68K_GOT32     7
 306 #define R_68K_GOT16     8
 307 #define R_68K_GOT8      9
 308 #define R_68K_GOT32O    10
 309 #define R_68K_GOT16O    11
 310 #define R_68K_GOT8O     12
 311 #define R_68K_PLT32     13
 312 #define R_68K_PLT16     14
 313 #define R_68K_PLT8      15
 314 #define R_68K_PLT32O    16
 315 #define R_68K_PLT16O    17
 316 #define R_68K_PLT8O     18
 317 #define R_68K_COPY      19
 318 #define R_68K_GLOB_DAT  20
 319 #define R_68K_JMP_SLOT  21
 320 #define R_68K_RELATIVE  22
 321
 322 /*
 323  * Alpha ELF relocation types
 324  */
 325 #define R_ALPHA_NONE            0       /* No reloc */
 326 #define R_ALPHA_REFLONG         1       /* Direct 32 bit */
 327 #define R_ALPHA_REFQUAD         2       /* Direct 64 bit */
 328 #define R_ALPHA_GPREL32         3       /* GP relative 32 bit */
 329 #define R_ALPHA_LITERAL         4       /* GP relative 16 bit w/optimization */
 330 #define R_ALPHA_LITUSE          5       /* Optimization hint for LITERAL */
 331 #define R_ALPHA_GPDISP          6       /* Add displacement to GP */
 332 #define R_ALPHA_BRADDR          7       /* PC+4 relative 23 bit shifted */
 333 #define R_ALPHA_HINT            8       /* PC+4 relative 16 bit shifted */
 334 #define R_ALPHA_SREL16          9       /* PC relative 16 bit */
 335 #define R_ALPHA_SREL32          10      /* PC relative 32 bit */
 336 #define R_ALPHA_SREL64          11      /* PC relative 64 bit */
 337 #define R_ALPHA_OP_PUSH         12      /* OP stack push */
 338 #define R_ALPHA_OP_STORE        13      /* OP stack pop and store */
 339 #define R_ALPHA_OP_PSUB         14      /* OP stack subtract */
 340 #define R_ALPHA_OP_PRSHIFT      15      /* OP stack right shift */
 341 #define R_ALPHA_GPVALUE         16
 342 #define R_ALPHA_GPRELHIGH       17
 343 #define R_ALPHA_GPRELLOW        18
 344 #define R_ALPHA_IMMED_GP_16     19
 345 #define R_ALPHA_IMMED_GP_HI32   20
 346 #define R_ALPHA_IMMED_SCN_HI32  21
 347 #define R_ALPHA_IMMED_BR_HI32   22
 348 #define R_ALPHA_IMMED_LO32      23
 349 #define R_ALPHA_COPY            24      /* Copy symbol at runtime */
 350 #define R_ALPHA_GLOB_DAT        25      /* Create GOT entry */
 351 #define R_ALPHA_JMP_SLOT        26      /* Create PLT entry */
 352 #define R_ALPHA_RELATIVE        27      /* Adjust by program base */
 353
 354 /* Legal values for e_flags field of Elf64_Ehdr.  */
 355
 356 #define EF_ALPHA_32BIT          1       /* All addresses are below 2GB */
 357
 358
 359 typedef struct elf32_rel {
 360   Elf32_Addr    r_offset;
 361   Elf32_Word    r_info;
 362 } Elf32_Rel;
 363
 364 typedef struct elf64_rel {
 365   Elf64_Addr r_offset;  /* Location at which to apply the action */
 366   Elf64_Word r_info;    /* index and type of relocation */
 367 } Elf64_Rel;
 368
 369 typedef struct elf32_rela{
 370   Elf32_Addr    r_offset;
 371   Elf32_Word    r_info;
 372   Elf32_Sword   r_addend;
 373 } Elf32_Rela;
 374
 375 typedef struct elf64_rela {
 376   Elf64_Addr r_offset;  /* Location at which to apply the action */
 377   Elf64_Word r_info;    /* index and type of relocation */
 378   Elf64_Word r_addend;  /* Constant addend used to compute value */
 379 } Elf64_Rela;
 380
 381 typedef struct elf32_sym{
 382   Elf32_Word    st_name;
 383   Elf32_Addr    st_value;
 384   Elf32_Word    st_size;
 385   unsigned char st_info;
 386   unsigned char st_other;
 387   Elf32_Half    st_shndx;
 388 } Elf32_Sym;
 389
 390 typedef struct elf64_sym {
 391   Elf32_Word st_name;           /* Symbol name, index in string tbl (yes, Elf32) */
 392   unsigned char st_info;        /* Type and binding attributes */
 393   unsigned char st_other;       /* No defined meaning, 0 */
 394   Elf64_Half st_shndx;          /* Associated section index */
 395   Elf64_Addr st_value;          /* Value of the symbol */
 396   Elf64_Word st_size;           /* Associated symbol size */
 397 } Elf64_Sym;
 398
 399
 400 #define EI_NIDENT       16
 401
 402 typedef struct elf32_hdr{
 403   unsigned char e_ident[EI_NIDENT];
 404   Elf32_Half    e_type;
 405   Elf32_Half    e_machine;
 406   Elf32_Word    e_version;
 407   Elf32_Addr    e_entry;  /* Entry point */
 408   Elf32_Off     e_phoff;
 409   Elf32_Off     e_shoff;
 410   Elf32_Word    e_flags;
 411   Elf32_Half    e_ehsize;
 412   Elf32_Half    e_phentsize;
 413   Elf32_Half    e_phnum;
 414   Elf32_Half    e_shentsize;
 415   Elf32_Half    e_shnum;
 416   Elf32_Half    e_shstrndx;
 417 } Elf32_Ehdr;
 418
 419 typedef struct elf64_hdr {
 420   unsigned char e_ident[16];            /* ELF "magic number" */
 421   Elf64_SHalf e_type;
 422   Elf64_Half e_machine;
 423   __s32 e_version;
 424   Elf64_Addr e_entry;           /* Entry point virtual address */
 425   Elf64_Off e_phoff;            /* Program header table file offset */
 426   Elf64_Off e_shoff;            /* Section header table file offset */
 427   __s32 e_flags;
 428   Elf64_SHalf e_ehsize;
 429   Elf64_SHalf e_phentsize;
 430   Elf64_SHalf e_phnum;
 431   Elf64_SHalf e_shentsize;
 432   Elf64_SHalf e_shnum;
 433   Elf64_SHalf e_shstrndx;
 434 } Elf64_Ehdr;
 435
 436 /* These constants define the permissions on sections in the program
 437    header, p_flags. */
 438 #define PF_R            0x4
 439 #define PF_W            0x2
 440 #define PF_X            0x1
 441
 442 typedef struct elf32_phdr{
 443   Elf32_Word    p_type;
 444   Elf32_Off     p_offset;
 445   Elf32_Addr    p_vaddr;
 446   Elf32_Addr    p_paddr;
 447   Elf32_Word    p_filesz;
 448   Elf32_Word    p_memsz;
 449   Elf32_Word    p_flags;
 450   Elf32_Word    p_align;
 451 } Elf32_Phdr;
 452
 453 typedef struct elf64_phdr {
 454   __s32 p_type;
 455   __s32 p_flags;
 456   Elf64_Off p_offset;           /* Segment file offset */
 457   Elf64_Addr p_vaddr;           /* Segment virtual address */
 458   Elf64_Addr p_paddr;           /* Segment physical address */
 459   Elf64_Word p_filesz;          /* Segment size in file */
 460   Elf64_Word p_memsz;           /* Segment size in memory */
 461   Elf64_Word p_align;           /* Segment alignment, file & memory */
 462 } Elf64_Phdr;
 463
 464 /* sh_type */
 465 #define SHT_NULL        0
 466 #define SHT_PROGBITS    1
 467 #define SHT_SYMTAB      2
 468 #define SHT_STRTAB      3
 469 #define SHT_RELA        4
 470 #define SHT_HASH        5
 471 #define SHT_DYNAMIC     6
 472 #define SHT_NOTE        7
 473 #define SHT_NOBITS      8
 474 #define SHT_REL         9
 475 #define SHT_SHLIB       10
 476 #define SHT_DYNSYM      11
 477 #define SHT_NUM         12
 478 #define SHT_LOPROC      0x70000000
 479 #define SHT_HIPROC      0x7fffffff
 480 #define SHT_LOUSER      0x80000000
 481 #define SHT_HIUSER      0xffffffff
 482 #define SHT_MIPS_LIST           0x70000000
 483 #define SHT_MIPS_CONFLICT       0x70000002
 484 #define SHT_MIPS_GPTAB          0x70000003
 485 #define SHT_MIPS_UCODE          0x70000004
 486
 487 /* sh_flags */
 488 #define SHF_WRITE       0x1
 489 #define SHF_ALLOC       0x2
 490 #define SHF_EXECINSTR   0x4
 491 #define SHF_MASKPROC    0xf0000000
 492 #define SHF_MIPS_GPREL  0x10000000
 493
 494 /* special section indexes */
 495 #define SHN_UNDEF       0
 496 #define SHN_LORESERVE   0xff00
 497 #define SHN_LOPROC      0xff00
 498 #define SHN_HIPROC      0xff1f
 499 #define SHN_ABS         0xfff1
 500 #define SHN_COMMON      0xfff2
 501 #define SHN_HIRESERVE   0xffff
 502 #define SHN_MIPS_ACCOMON        0xff00
 503
 504 typedef struct {
 505   Elf32_Word    sh_name;
 506   Elf32_Word    sh_type;
 507   Elf32_Word    sh_flags;
 508   Elf32_Addr    sh_addr;
 509   Elf32_Off     sh_offset;
 510   Elf32_Word    sh_size;
 511   Elf32_Word    sh_link;
 512   Elf32_Word    sh_info;
 513   Elf32_Word    sh_addralign;
 514   Elf32_Word    sh_entsize;
 515 } Elf32_Shdr;
 516
 517 typedef struct elf64_shdr {
 518   Elf32_Word sh_name;           /* Section name, index in string tbl (yes Elf32) */
 519   Elf32_Word sh_type;           /* Type of section (yes Elf32) */
 520   Elf64_Word sh_flags;          /* Miscellaneous section attributes */
 521   Elf64_Addr sh_addr;           /* Section virtual addr at execution */
 522   Elf64_Off sh_offset;          /* Section file offset */
 523   Elf64_Word sh_size;           /* Size of section in bytes */
 524   Elf32_Word sh_link;           /* Index of another section (yes Elf32) */
 525   Elf32_Word sh_info;           /* Additional section information (yes Elf32) */
 526   Elf64_Word sh_addralign;      /* Section alignment */
 527   Elf64_Word sh_entsize;        /* Entry size if section holds table */
 528 } Elf64_Shdr;
 529
 530 #define EI_MAG0         0               /* e_ident[] indexes */
 531 #define EI_MAG1         1
 532 #define EI_MAG2         2
 533 #define EI_MAG3         3
 534 #define EI_CLASS        4
 535 #define EI_DATA         5
 536 #define EI_VERSION      6
 537 #define EI_PAD          7
 538
 539 #define ELFMAG0         0x7f            /* EI_MAG */
 540 #define ELFMAG1         'E'
 541 #define ELFMAG2         'L'
 542 #define ELFMAG3         'F'
 543 #define ELFMAG          "\177ELF"
 544 #define SELFMAG         4
 545
 546 #define ELFCLASSNONE    0               /* EI_CLASS */
 547 #define ELFCLASS32      1
 548 #define ELFCLASS64      2
 549 #define ELFCLASSNUM     3
 550
 551 #define ELFDATANONE     0               /* e_ident[EI_DATA] */
 552 #define ELFDATA2LSB     1
 553 #define ELFDATA2MSB     2
 554
 555 #define EV_NONE         0               /* e_version, EI_VERSION */
 556 #define EV_CURRENT      1
 557 #define EV_NUM          2
 558
 559 /* Notes used in ET_CORE */
 560 #define NT_PRSTATUS     1
 561 #define NT_PRFPREG      2
 562 #define NT_PRPSINFO     3
 563 #define NT_TASKSTRUCT   4
 564
 565 /* Note header in a PT_NOTE section */
 566 typedef struct elf32_note {
 567   Elf32_Word    n_namesz;       /* Name size */
 568   Elf32_Word    n_descsz;       /* Content size */
 569   Elf32_Word    n_type;         /* Content type */
 570 } Elf32_Nhdr;
 571
 572 /* Note header in a PT_NOTE section */
 573 /*
 574  * For now we use the 32 bit version of the structure until we figure
 575  * out whether we need anything better.  Note - on the Alpha, "unsigned int"
 576  * is only 32 bits.
 577  */
 578 typedef struct elf64_note {
 579   Elf32_Word n_namesz;  /* Name size */
 580   Elf32_Word n_descsz;  /* Content size */
 581   Elf32_Word n_type;    /* Content type */
 582 } Elf64_Nhdr;
 583
 584 #if ELF_CLASS == ELFCLASS32
 585
 586 extern Elf32_Dyn _DYNAMIC [];
 587 #define elfhdr          elf32_hdr
 588 #define elf_phdr        elf32_phdr
 589 #define elf_note        elf32_note
 590
 591 #else
 592
 593 extern Elf64_Dyn _DYNAMIC [];
 594 #define elfhdr          elf64_hdr
 595 #define elf_phdr        elf64_phdr
 596 #define elf_note        elf64_note
 597
 598 #endif
 599
 600
 601 #endif /* _LINUX_ELF_H */