include/uapi/linux/elf.h

   1 #ifndef _UAPI_LINUX_ELF_H
   2 #define _UAPI_LINUX_ELF_H
   3
   4 #include <linux/types.h>
   5 #include <linux/elf-em.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_TLS     7               /* Thread local storage segment */
  33 #define PT_LOOS    0x60000000      /* OS-specific */
  34 #define PT_HIOS    0x6fffffff      /* OS-specific */
  35 #define PT_LOPROC  0x70000000
  36 #define PT_HIPROC  0x7fffffff
  37 #define PT_GNU_EH_FRAME         0x6474e550
  38
  39 #define PT_GNU_STACK    (PT_LOOS + 0x474e551)
  40 #define PT_GNU_RELRO    (PT_LOOS + 0x474e552)
  41
  42 #define PT_PAX_FLAGS    (PT_LOOS + 0x5041580)
  43
  44 /* Constants for the e_flags field */
  45 #define EF_PAX_PAGEEXEC         1       /* Paging based non-executable pages */
  46 #define EF_PAX_EMUTRAMP         2       /* Emulate trampolines */
  47 #define EF_PAX_MPROTECT         4       /* Restrict mprotect() */
  48 #define EF_PAX_RANDMMAP         8       /* Randomize mmap() base */
  49 /*#define EF_PAX_RANDEXEC               16*/    /* Randomize ET_EXEC base */
  50 #define EF_PAX_SEGMEXEC         32      /* Segmentation based non-executable pages */
  51
  52 /*
  53  * Extended Numbering
  54  *
  55  * If the real number of program header table entries is larger than
  56  * or equal to PN_XNUM(0xffff), it is set to sh_info field of the
  57  * section header at index 0, and PN_XNUM is set to e_phnum
  58  * field. Otherwise, the section header at index 0 is zero
  59  * initialized, if it exists.
  60  *
  61  * Specifications are available in:
  62  *
  63  * - Oracle: Linker and Libraries.
  64  *   Part No: 817–1984–19, August 2011.
  65  *   http://docs.oracle.com/cd/E18752_01/pdf/817-1984.pdf
  66  *
  67  * - System V ABI AMD64 Architecture Processor Supplement
  68  *   Draft Version 0.99.4,
  69  *   January 13, 2010.
  70  *   http://www.cs.washington.edu/education/courses/cse351/12wi/supp-docs/abi.pdf
  71  */
  72 #define PN_XNUM 0xffff
  73
  74 /* These constants define the different elf file types */
  75 #define ET_NONE   0
  76 #define ET_REL    1
  77 #define ET_EXEC   2
  78 #define ET_DYN    3
  79 #define ET_CORE   4
  80 #define ET_LOPROC 0xff00
  81 #define ET_HIPROC 0xffff
  82
  83 /* This is the info that is needed to parse the dynamic section of the file */
  84 #define DT_NULL         0
  85 #define DT_NEEDED       1
  86 #define DT_PLTRELSZ     2
  87 #define DT_PLTGOT       3
  88 #define DT_HASH         4
  89 #define DT_STRTAB       5
  90 #define DT_SYMTAB       6
  91 #define DT_RELA         7
  92 #define DT_RELASZ       8
  93 #define DT_RELAENT      9
  94 #define DT_STRSZ        10
  95 #define DT_SYMENT       11
  96 #define DT_INIT         12
  97 #define DT_FINI         13
  98 #define DT_SONAME       14
  99 #define DT_RPATH        15
 100 #define DT_SYMBOLIC     16
 101 #define DT_REL          17
 102 #define DT_RELSZ        18
 103 #define DT_RELENT       19
 104 #define DT_PLTREL       20
 105 #define DT_DEBUG        21
 106 #define DT_TEXTREL      22
 107 #define DT_JMPREL       23
 108 #define DT_FLAGS        30
 109   #define DF_TEXTREL  0x00000004
 110 #define DT_ENCODING     32
 111 #define OLD_DT_LOOS     0x60000000
 112 #define DT_LOOS         0x6000000d
 113 #define DT_HIOS         0x6ffff000
 114 #define DT_VALRNGLO     0x6ffffd00
 115 #define DT_VALRNGHI     0x6ffffdff
 116 #define DT_ADDRRNGLO    0x6ffffe00
 117 #define DT_ADDRRNGHI    0x6ffffeff
 118 #define DT_VERSYM       0x6ffffff0
 119 #define DT_RELACOUNT    0x6ffffff9
 120 #define DT_RELCOUNT     0x6ffffffa
 121 #define DT_FLAGS_1      0x6ffffffb
 122 #define DT_VERDEF       0x6ffffffc
 123 #define DT_VERDEFNUM    0x6ffffffd
 124 #define DT_VERNEED      0x6ffffffe
 125 #define DT_VERNEEDNUM   0x6fffffff
 126 #define OLD_DT_HIOS     0x6fffffff
 127 #define DT_LOPROC       0x70000000
 128 #define DT_HIPROC       0x7fffffff
 129
 130 /* This info is needed when parsing the symbol table */
 131 #define STB_LOCAL  0
 132 #define STB_GLOBAL 1
 133 #define STB_WEAK   2
 134
 135 #define STT_NOTYPE  0
 136 #define STT_OBJECT  1
 137 #define STT_FUNC    2
 138 #define STT_SECTION 3
 139 #define STT_FILE    4
 140 #define STT_COMMON  5
 141 #define STT_TLS     6
 142
 143 #define ELF_ST_BIND(x)          ((x) >> 4)
 144 #define ELF_ST_TYPE(x)          (((unsigned int) x) & 0xf)
 145 #define ELF32_ST_BIND(x)        ELF_ST_BIND(x)
 146 #define ELF32_ST_TYPE(x)        ELF_ST_TYPE(x)
 147 #define ELF64_ST_BIND(x)        ELF_ST_BIND(x)
 148 #define ELF64_ST_TYPE(x)        ELF_ST_TYPE(x)
 149
 150 typedef struct dynamic{
 151   Elf32_Sword d_tag;
 152   union{
 153     Elf32_Sword d_val;
 154     Elf32_Addr  d_ptr;
 155   } d_un;
 156 } Elf32_Dyn;
 157
 158 typedef struct {
 159   Elf64_Sxword d_tag;           /* entry tag value */
 160   union {
 161     Elf64_Xword d_val;
 162     Elf64_Addr d_ptr;
 163   } d_un;
 164 } Elf64_Dyn;
 165
 166 /* The following are used with relocations */
 167 #define ELF32_R_SYM(x) ((x) >> 8)
 168 #define ELF32_R_TYPE(x) ((x) & 0xff)
 169
 170 #define ELF64_R_SYM(i)                  ((i) >> 32)
 171 #define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
 172
 173 typedef struct elf32_rel {
 174   Elf32_Addr    r_offset;
 175   Elf32_Word    r_info;
 176 } Elf32_Rel;
 177
 178 typedef struct elf64_rel {
 179   Elf64_Addr r_offset;  /* Location at which to apply the action */
 180   Elf64_Xword r_info;   /* index and type of relocation */
 181 } Elf64_Rel;
 182
 183 typedef struct elf32_rela{
 184   Elf32_Addr    r_offset;
 185   Elf32_Word    r_info;
 186   Elf32_Sword   r_addend;
 187 } Elf32_Rela;
 188
 189 typedef struct elf64_rela {
 190   Elf64_Addr r_offset;  /* Location at which to apply the action */
 191   Elf64_Xword r_info;   /* index and type of relocation */
 192   Elf64_Sxword r_addend;        /* Constant addend used to compute value */
 193 } Elf64_Rela;
 194
 195 typedef struct elf32_sym{
 196   Elf32_Word    st_name;
 197   Elf32_Addr    st_value;
 198   Elf32_Word    st_size;
 199   unsigned char st_info;
 200   unsigned char st_other;
 201   Elf32_Half    st_shndx;
 202 } Elf32_Sym;
 203
 204 typedef struct elf64_sym {
 205   Elf64_Word st_name;           /* Symbol name, index in string tbl */
 206   unsigned char st_info;        /* Type and binding attributes */
 207   unsigned char st_other;       /* No defined meaning, 0 */
 208   Elf64_Half st_shndx;          /* Associated section index */
 209   Elf64_Addr st_value;          /* Value of the symbol */
 210   Elf64_Xword st_size;          /* Associated symbol size */
 211 } Elf64_Sym;
 212
 213
 214 #define EI_NIDENT       16
 215
 216 typedef struct elf32_hdr{
 217   unsigned char e_ident[EI_NIDENT];
 218   Elf32_Half    e_type;
 219   Elf32_Half    e_machine;
 220   Elf32_Word    e_version;
 221   Elf32_Addr    e_entry;  /* Entry point */
 222   Elf32_Off     e_phoff;
 223   Elf32_Off     e_shoff;
 224   Elf32_Word    e_flags;
 225   Elf32_Half    e_ehsize;
 226   Elf32_Half    e_phentsize;
 227   Elf32_Half    e_phnum;
 228   Elf32_Half    e_shentsize;
 229   Elf32_Half    e_shnum;
 230   Elf32_Half    e_shstrndx;
 231 } Elf32_Ehdr;
 232
 233 typedef struct elf64_hdr {
 234   unsigned char e_ident[EI_NIDENT];     /* ELF "magic number" */
 235   Elf64_Half e_type;
 236   Elf64_Half e_machine;
 237   Elf64_Word e_version;
 238   Elf64_Addr e_entry;           /* Entry point virtual address */
 239   Elf64_Off e_phoff;            /* Program header table file offset */
 240   Elf64_Off e_shoff;            /* Section header table file offset */
 241   Elf64_Word e_flags;
 242   Elf64_Half e_ehsize;
 243   Elf64_Half e_phentsize;
 244   Elf64_Half e_phnum;
 245   Elf64_Half e_shentsize;
 246   Elf64_Half e_shnum;
 247   Elf64_Half e_shstrndx;
 248 } Elf64_Ehdr;
 249
 250 /* These constants define the permissions on sections in the program
 251    header, p_flags. */
 252 #define PF_R            0x4
 253 #define PF_W            0x2
 254 #define PF_X            0x1
 255
 256 #define PF_PAGEEXEC     (1U << 4)       /* Enable  PAGEEXEC */
 257 #define PF_NOPAGEEXEC   (1U << 5)       /* Disable PAGEEXEC */
 258 #define PF_SEGMEXEC     (1U << 6)       /* Enable  SEGMEXEC */
 259 #define PF_NOSEGMEXEC   (1U << 7)       /* Disable SEGMEXEC */
 260 #define PF_MPROTECT     (1U << 8)       /* Enable  MPROTECT */
 261 #define PF_NOMPROTECT   (1U << 9)       /* Disable MPROTECT */
 262 /*#define PF_RANDEXEC   (1U << 10)*/    /* Enable  RANDEXEC */
 263 /*#define PF_NORANDEXEC (1U << 11)*/    /* Disable RANDEXEC */
 264 #define PF_EMUTRAMP     (1U << 12)      /* Enable  EMUTRAMP */
 265 #define PF_NOEMUTRAMP   (1U << 13)      /* Disable EMUTRAMP */
 266 #define PF_RANDMMAP     (1U << 14)      /* Enable  RANDMMAP */
 267 #define PF_NORANDMMAP   (1U << 15)      /* Disable RANDMMAP */
 268
 269 typedef struct elf32_phdr{
 270   Elf32_Word    p_type;
 271   Elf32_Off     p_offset;
 272   Elf32_Addr    p_vaddr;
 273   Elf32_Addr    p_paddr;
 274   Elf32_Word    p_filesz;
 275   Elf32_Word    p_memsz;
 276   Elf32_Word    p_flags;
 277   Elf32_Word    p_align;
 278 } Elf32_Phdr;
 279
 280 typedef struct elf64_phdr {
 281   Elf64_Word p_type;
 282   Elf64_Word p_flags;
 283   Elf64_Off p_offset;           /* Segment file offset */
 284   Elf64_Addr p_vaddr;           /* Segment virtual address */
 285   Elf64_Addr p_paddr;           /* Segment physical address */
 286   Elf64_Xword p_filesz;         /* Segment size in file */
 287   Elf64_Xword p_memsz;          /* Segment size in memory */
 288   Elf64_Xword p_align;          /* Segment alignment, file & memory */
 289 } Elf64_Phdr;
 290
 291 /* sh_type */
 292 #define SHT_NULL        0
 293 #define SHT_PROGBITS    1
 294 #define SHT_SYMTAB      2
 295 #define SHT_STRTAB      3
 296 #define SHT_RELA        4
 297 #define SHT_HASH        5
 298 #define SHT_DYNAMIC     6
 299 #define SHT_NOTE        7
 300 #define SHT_NOBITS      8
 301 #define SHT_REL         9
 302 #define SHT_SHLIB       10
 303 #define SHT_DYNSYM      11
 304 #define SHT_NUM         12
 305 #define SHT_LOPROC      0x70000000
 306 #define SHT_HIPROC      0x7fffffff
 307 #define SHT_LOUSER      0x80000000
 308 #define SHT_HIUSER      0xffffffff
 309
 310 /* sh_flags */
 311 #define SHF_WRITE       0x1
 312 #define SHF_ALLOC       0x2
 313 #define SHF_EXECINSTR   0x4
 314 #define SHF_MASKPROC    0xf0000000
 315
 316 /* special section indexes */
 317 #define SHN_UNDEF       0
 318 #define SHN_LORESERVE   0xff00
 319 #define SHN_LOPROC      0xff00
 320 #define SHN_HIPROC      0xff1f
 321 #define SHN_ABS         0xfff1
 322 #define SHN_COMMON      0xfff2
 323 #define SHN_HIRESERVE   0xffff
 324
 325 typedef struct elf32_shdr {
 326   Elf32_Word    sh_name;
 327   Elf32_Word    sh_type;
 328   Elf32_Word    sh_flags;
 329   Elf32_Addr    sh_addr;
 330   Elf32_Off     sh_offset;
 331   Elf32_Word    sh_size;
 332   Elf32_Word    sh_link;
 333   Elf32_Word    sh_info;
 334   Elf32_Word    sh_addralign;
 335   Elf32_Word    sh_entsize;
 336 } Elf32_Shdr;
 337
 338 typedef struct elf64_shdr {
 339   Elf64_Word sh_name;           /* Section name, index in string tbl */
 340   Elf64_Word sh_type;           /* Type of section */
 341   Elf64_Xword sh_flags;         /* Miscellaneous section attributes */
 342   Elf64_Addr sh_addr;           /* Section virtual addr at execution */
 343   Elf64_Off sh_offset;          /* Section file offset */
 344   Elf64_Xword sh_size;          /* Size of section in bytes */
 345   Elf64_Word sh_link;           /* Index of another section */
 346   Elf64_Word sh_info;           /* Additional section information */
 347   Elf64_Xword sh_addralign;     /* Section alignment */
 348   Elf64_Xword sh_entsize;       /* Entry size if section holds table */
 349 } Elf64_Shdr;
 350
 351 #define EI_MAG0         0               /* e_ident[] indexes */
 352 #define EI_MAG1         1
 353 #define EI_MAG2         2
 354 #define EI_MAG3         3
 355 #define EI_CLASS        4
 356 #define EI_DATA         5
 357 #define EI_VERSION      6
 358 #define EI_OSABI        7
 359 #define EI_PAD          8
 360
 361 #define EI_PAX          14
 362
 363 #define ELFMAG0         0x7f            /* EI_MAG */
 364 #define ELFMAG1         'E'
 365 #define ELFMAG2         'L'
 366 #define ELFMAG3         'F'
 367 #define ELFMAG          "\177ELF"
 368 #define SELFMAG         4
 369
 370 #define ELFCLASSNONE    0               /* EI_CLASS */
 371 #define ELFCLASS32      1
 372 #define ELFCLASS64      2
 373 #define ELFCLASSNUM     3
 374
 375 #define ELFDATANONE     0               /* e_ident[EI_DATA] */
 376 #define ELFDATA2LSB     1
 377 #define ELFDATA2MSB     2
 378
 379 #define EV_NONE         0               /* e_version, EI_VERSION */
 380 #define EV_CURRENT      1
 381 #define EV_NUM          2
 382
 383 #define ELFOSABI_NONE   0
 384 #define ELFOSABI_LINUX  3
 385
 386 #ifndef ELF_OSABI
 387 #define ELF_OSABI ELFOSABI_NONE
 388 #endif
 389
 390 /*
 391  * Notes used in ET_CORE. Architectures export some of the arch register sets
 392  * using the corresponding note types via the PTRACE_GETREGSET and
 393  * PTRACE_SETREGSET requests.
 394  */
 395 #define NT_PRSTATUS     1
 396 #define NT_PRFPREG      2
 397 #define NT_PRPSINFO     3
 398 #define NT_TASKSTRUCT   4
 399 #define NT_AUXV         6
 400 /*
 401  * Note to userspace developers: size of NT_SIGINFO note may increase
 402  * in the future to accomodate more fields, don't assume it is fixed!
 403  */
 404 #define NT_SIGINFO      0x53494749
 405 #define NT_FILE         0x46494c45
 406 #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
 407 #define NT_PPC_VMX      0x100           /* PowerPC Altivec/VMX registers */
 408 #define NT_PPC_SPE      0x101           /* PowerPC SPE/EVR registers */
 409 #define NT_PPC_VSX      0x102           /* PowerPC VSX registers */
 410 #define NT_386_TLS      0x200           /* i386 TLS slots (struct user_desc) */
 411 #define NT_386_IOPERM   0x201           /* x86 io permission bitmap (1=deny) */
 412 #define NT_X86_XSTATE   0x202           /* x86 extended state using xsave */
 413 #define NT_S390_HIGH_GPRS       0x300   /* s390 upper register halves */
 414 #define NT_S390_TIMER   0x301           /* s390 timer register */
 415 #define NT_S390_TODCMP  0x302           /* s390 TOD clock comparator register */
 416 #define NT_S390_TODPREG 0x303           /* s390 TOD programmable register */
 417 #define NT_S390_CTRS    0x304           /* s390 control registers */
 418 #define NT_S390_PREFIX  0x305           /* s390 prefix register */
 419 #define NT_S390_LAST_BREAK      0x306   /* s390 breaking event address */
 420 #define NT_S390_SYSTEM_CALL     0x307   /* s390 system call restart data */
 421 #define NT_S390_TDB     0x308           /* s390 transaction diagnostic block */
 422 #define NT_S390_VXRS_LOW        0x309   /* s390 vector registers 0-15 upper half */
 423 #define NT_S390_VXRS_HIGH       0x30a   /* s390 vector registers 16-31 */
 424 #define NT_ARM_VFP      0x400           /* ARM VFP/NEON registers */
 425 #define NT_ARM_TLS      0x401           /* ARM TLS register */
 426 #define NT_ARM_HW_BREAK 0x402           /* ARM hardware breakpoint registers */
 427 #define NT_ARM_HW_WATCH 0x403           /* ARM hardware watchpoint registers */
 428 #define NT_ARM_SYSTEM_CALL      0x404   /* ARM system call number */
 429 #define NT_METAG_CBUF   0x500           /* Metag catch buffer registers */
 430 #define NT_METAG_RPIPE  0x501           /* Metag read pipeline state */
 431 #define NT_METAG_TLS    0x502           /* Metag TLS pointer */
 432
 433
 434 /* Note header in a PT_NOTE section */
 435 typedef struct elf32_note {
 436   Elf32_Word    n_namesz;       /* Name size */
 437   Elf32_Word    n_descsz;       /* Content size */
 438   Elf32_Word    n_type;         /* Content type */
 439 } Elf32_Nhdr;
 440
 441 /* Note header in a PT_NOTE section */
 442 typedef struct elf64_note {
 443   Elf64_Word n_namesz;  /* Name size */
 444   Elf64_Word n_descsz;  /* Content size */
 445   Elf64_Word n_type;    /* Content type */
 446 } Elf64_Nhdr;
 447
 448 #endif /* _UAPI_LINUX_ELF_H */