linux/include/linux/elf.h
<<
>>
Prefs
   1#ifndef _LINUX_ELF_H
   2#define _LINUX_ELF_H
   3
   4#include <linux/types.h>
   5#include <linux/elf-em.h>
   6#ifdef __KERNEL__
   7#include <asm/elf.h>
   8#endif
   9
  10/* 32-bit ELF base types. */
  11typedef __u32   Elf32_Addr;
  12typedef __u16   Elf32_Half;
  13typedef __u32   Elf32_Off;
  14typedef __s32   Elf32_Sword;
  15typedef __u32   Elf32_Word;
  16
  17/* 64-bit ELF base types. */
  18typedef __u64   Elf64_Addr;
  19typedef __u16   Elf64_Half;
  20typedef __s16   Elf64_SHalf;
  21typedef __u64   Elf64_Off;
  22typedef __s32   Elf64_Sword;
  23typedef __u32   Elf64_Word;
  24typedef __u64   Elf64_Xword;
  25typedef __s64   Elf64_Sxword;
  26
  27/* These constants are for the segment types stored in the image headers */
  28#define PT_NULL    0
  29#define PT_LOAD    1
  30#define PT_DYNAMIC 2
  31#define PT_INTERP  3
  32#define PT_NOTE    4
  33#define PT_SHLIB   5
  34#define PT_PHDR    6
  35#define PT_TLS     7               /* Thread local storage segment */
  36#define PT_LOOS    0x60000000      /* OS-specific */
  37#define PT_HIOS    0x6fffffff      /* OS-specific */
  38#define PT_LOPROC  0x70000000
  39#define PT_HIPROC  0x7fffffff
  40#define PT_GNU_EH_FRAME         0x6474e550
  41
  42#define PT_GNU_STACK    (PT_LOOS + 0x474e551)
  43
  44/*
  45 * Extended Numbering
  46 *
  47 * If the real number of program header table entries is larger than
  48 * or equal to PN_XNUM(0xffff), it is set to sh_info field of the
  49 * section header at index 0, and PN_XNUM is set to e_phnum
  50 * field. Otherwise, the section header at index 0 is zero
  51 * initialized, if it exists.
  52 *
  53 * Specifications are available in:
  54 *
  55 * - Sun microsystems: Linker and Libraries.
  56 *   Part No: 817-1984-17, September 2008.
  57 *   URL: http://docs.sun.com/app/docs/doc/817-1984
  58 *
  59 * - System V ABI AMD64 Architecture Processor Supplement
  60 *   Draft Version 0.99.,
  61 *   May 11, 2009.
  62 *   URL: http://www.x86-64.org/
  63 */
  64#define PN_XNUM 0xffff
  65
  66/* These constants define the different elf file types */
  67#define ET_NONE   0
  68#define ET_REL    1
  69#define ET_EXEC   2
  70#define ET_DYN    3
  71#define ET_CORE   4
  72#define ET_LOPROC 0xff00
  73#define ET_HIPROC 0xffff
  74
  75/* This is the info that is needed to parse the dynamic section of the file */
  76#define DT_NULL         0
  77#define DT_NEEDED       1
  78#define DT_PLTRELSZ     2
  79#define DT_PLTGOT       3
  80#define DT_HASH         4
  81#define DT_STRTAB       5
  82#define DT_SYMTAB       6
  83#define DT_RELA         7
  84#define DT_RELASZ       8
  85#define DT_RELAENT      9
  86#define DT_STRSZ        10
  87#define DT_SYMENT       11
  88#define DT_INIT         12
  89#define DT_FINI         13
  90#define DT_SONAME       14
  91#define DT_RPATH        15
  92#define DT_SYMBOLIC     16
  93#define DT_REL          17
  94#define DT_RELSZ        18
  95#define DT_RELENT       19
  96#define DT_PLTREL       20
  97#define DT_DEBUG        21
  98#define DT_TEXTREL      22
  99#define DT_JMPREL       23
 100#define DT_ENCODING     32
 101#define OLD_DT_LOOS     0x60000000
 102#define DT_LOOS         0x6000000d
 103#define DT_HIOS         0x6ffff000
 104#define DT_VALRNGLO     0x6ffffd00
 105#define DT_VALRNGHI     0x6ffffdff
 106#define DT_ADDRRNGLO    0x6ffffe00
 107#define DT_ADDRRNGHI    0x6ffffeff
 108#define DT_VERSYM       0x6ffffff0
 109#define DT_RELACOUNT    0x6ffffff9
 110#define DT_RELCOUNT     0x6ffffffa
 111#define DT_FLAGS_1      0x6ffffffb
 112#define DT_VERDEF       0x6ffffffc
 113#define DT_VERDEFNUM    0x6ffffffd
 114#define DT_VERNEED      0x6ffffffe
 115#define DT_VERNEEDNUM   0x6fffffff
 116#define OLD_DT_HIOS     0x6fffffff
 117#define DT_LOPROC       0x70000000
 118#define DT_HIPROC       0x7fffffff
 119
 120/* This info is needed when parsing the symbol table */
 121#define STB_LOCAL  0
 122#define STB_GLOBAL 1
 123#define STB_WEAK   2
 124
 125#define STT_NOTYPE  0
 126#define STT_OBJECT  1
 127#define STT_FUNC    2
 128#define STT_SECTION 3
 129#define STT_FILE    4
 130#define STT_COMMON  5
 131#define STT_TLS     6
 132
 133#define ELF_ST_BIND(x)          ((x) >> 4)
 134#define ELF_ST_TYPE(x)          (((unsigned int) x) & 0xf)
 135#define ELF32_ST_BIND(x)        ELF_ST_BIND(x)
 136#define ELF32_ST_TYPE(x)        ELF_ST_TYPE(x)
 137#define ELF64_ST_BIND(x)        ELF_ST_BIND(x)
 138#define ELF64_ST_TYPE(x)        ELF_ST_TYPE(x)
 139
 140typedef struct dynamic{
 141  Elf32_Sword d_tag;
 142  union{
 143    Elf32_Sword d_val;
 144    Elf32_Addr  d_ptr;
 145  } d_un;
 146} Elf32_Dyn;
 147
 148typedef struct {
 149  Elf64_Sxword d_tag;           /* entry tag value */
 150  union {
 151    Elf64_Xword d_val;
 152    Elf64_Addr d_ptr;
 153  } d_un;
 154} Elf64_Dyn;
 155
 156/* The following are used with relocations */
 157#define ELF32_R_SYM(x) ((x) >> 8)
 158#define ELF32_R_TYPE(x) ((x) & 0xff)
 159
 160#define ELF64_R_SYM(i)                  ((i) >> 32)
 161#define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
 162
 163typedef struct elf32_rel {
 164  Elf32_Addr    r_offset;
 165  Elf32_Word    r_info;
 166} Elf32_Rel;
 167
 168typedef struct elf64_rel {
 169  Elf64_Addr r_offset;  /* Location at which to apply the action */
 170  Elf64_Xword r_info;   /* index and type of relocation */
 171} Elf64_Rel;
 172
 173typedef struct elf32_rela{
 174  Elf32_Addr    r_offset;
 175  Elf32_Word    r_info;
 176  Elf32_Sword   r_addend;
 177} Elf32_Rela;
 178
 179typedef struct elf64_rela {
 180  Elf64_Addr r_offset;  /* Location at which to apply the action */
 181  Elf64_Xword r_info;   /* index and type of relocation */
 182  Elf64_Sxword r_addend;        /* Constant addend used to compute value */
 183} Elf64_Rela;
 184
 185typedef struct elf32_sym{
 186  Elf32_Word    st_name;
 187  Elf32_Addr    st_value;
 188  Elf32_Word    st_size;
 189  unsigned char st_info;
 190  unsigned char st_other;
 191  Elf32_Half    st_shndx;
 192} Elf32_Sym;
 193
 194typedef struct elf64_sym {
 195  Elf64_Word st_name;           /* Symbol name, index in string tbl */
 196  unsigned char st_info;        /* Type and binding attributes */
 197  unsigned char st_other;       /* No defined meaning, 0 */
 198  Elf64_Half st_shndx;          /* Associated section index */
 199  Elf64_Addr st_value;          /* Value of the symbol */
 200  Elf64_Xword st_size;          /* Associated symbol size */
 201} Elf64_Sym;
 202
 203
 204#define EI_NIDENT       16
 205
 206typedef struct elf32_hdr{
 207  unsigned char e_ident[EI_NIDENT];
 208  Elf32_Half    e_type;
 209  Elf32_Half    e_machine;
 210  Elf32_Word    e_version;
 211  Elf32_Addr    e_entry;  /* Entry point */
 212  Elf32_Off     e_phoff;
 213  Elf32_Off     e_shoff;
 214  Elf32_Word    e_flags;
 215  Elf32_Half    e_ehsize;
 216  Elf32_Half    e_phentsize;
 217  Elf32_Half    e_phnum;
 218  Elf32_Half    e_shentsize;
 219  Elf32_Half    e_shnum;
 220  Elf32_Half    e_shstrndx;
 221} Elf32_Ehdr;
 222
 223typedef struct elf64_hdr {
 224  unsigned char e_ident[EI_NIDENT];     /* ELF "magic number" */
 225  Elf64_Half e_type;
 226  Elf64_Half e_machine;
 227  Elf64_Word e_version;
 228  Elf64_Addr e_entry;           /* Entry point virtual address */
 229  Elf64_Off e_phoff;            /* Program header table file offset */
 230  Elf64_Off e_shoff;            /* Section header table file offset */
 231  Elf64_Word e_flags;
 232  Elf64_Half e_ehsize;
 233  Elf64_Half e_phentsize;
 234  Elf64_Half e_phnum;
 235  Elf64_Half e_shentsize;
 236  Elf64_Half e_shnum;
 237  Elf64_Half e_shstrndx;
 238} Elf64_Ehdr;
 239
 240/* These constants define the permissions on sections in the program
 241   header, p_flags. */
 242#define PF_R            0x4
 243#define PF_W            0x2
 244#define PF_X            0x1
 245
 246typedef struct elf32_phdr{
 247  Elf32_Word    p_type;
 248  Elf32_Off     p_offset;
 249  Elf32_Addr    p_vaddr;
 250  Elf32_Addr    p_paddr;
 251  Elf32_Word    p_filesz;
 252  Elf32_Word    p_memsz;
 253  Elf32_Word    p_flags;
 254  Elf32_Word    p_align;
 255} Elf32_Phdr;
 256
 257typedef struct elf64_phdr {
 258  Elf64_Word p_type;
 259  Elf64_Word p_flags;
 260  Elf64_Off p_offset;           /* Segment file offset */
 261  Elf64_Addr p_vaddr;           /* Segment virtual address */
 262  Elf64_Addr p_paddr;           /* Segment physical address */
 263  Elf64_Xword p_filesz;         /* Segment size in file */
 264  Elf64_Xword p_memsz;          /* Segment size in memory */
 265  Elf64_Xword p_align;          /* Segment alignment, file & memory */
 266} Elf64_Phdr;
 267
 268/* sh_type */
 269#define SHT_NULL        0
 270#define SHT_PROGBITS    1
 271#define SHT_SYMTAB      2
 272#define SHT_STRTAB      3
 273#define SHT_RELA        4
 274#define SHT_HASH        5
 275#define SHT_DYNAMIC     6
 276#define SHT_NOTE        7
 277#define SHT_NOBITS      8
 278#define SHT_REL         9
 279#define SHT_SHLIB       10
 280#define SHT_DYNSYM      11
 281#define SHT_NUM         12
 282#define SHT_LOPROC      0x70000000
 283#define SHT_HIPROC      0x7fffffff
 284#define SHT_LOUSER      0x80000000
 285#define SHT_HIUSER      0xffffffff
 286
 287/* sh_flags */
 288#define SHF_WRITE       0x1
 289#define SHF_ALLOC       0x2
 290#define SHF_EXECINSTR   0x4
 291#define SHF_MASKPROC    0xf0000000
 292
 293/* special section indexes */
 294#define SHN_UNDEF       0
 295#define SHN_LORESERVE   0xff00
 296#define SHN_LOPROC      0xff00
 297#define SHN_HIPROC      0xff1f
 298#define SHN_ABS         0xfff1
 299#define SHN_COMMON      0xfff2
 300#define SHN_HIRESERVE   0xffff
 301 
 302typedef struct elf32_shdr {
 303  Elf32_Word    sh_name;
 304  Elf32_Word    sh_type;
 305  Elf32_Word    sh_flags;
 306  Elf32_Addr    sh_addr;
 307  Elf32_Off     sh_offset;
 308  Elf32_Word    sh_size;
 309  Elf32_Word    sh_link;
 310  Elf32_Word    sh_info;
 311  Elf32_Word    sh_addralign;
 312  Elf32_Word    sh_entsize;
 313} Elf32_Shdr;
 314
 315typedef struct elf64_shdr {
 316  Elf64_Word sh_name;           /* Section name, index in string tbl */
 317  Elf64_Word sh_type;           /* Type of section */
 318  Elf64_Xword sh_flags;         /* Miscellaneous section attributes */
 319  Elf64_Addr sh_addr;           /* Section virtual addr at execution */
 320  Elf64_Off sh_offset;          /* Section file offset */
 321  Elf64_Xword sh_size;          /* Size of section in bytes */
 322  Elf64_Word sh_link;           /* Index of another section */
 323  Elf64_Word sh_info;           /* Additional section information */
 324  Elf64_Xword sh_addralign;     /* Section alignment */
 325  Elf64_Xword sh_entsize;       /* Entry size if section holds table */
 326} Elf64_Shdr;
 327
 328#define EI_MAG0         0               /* e_ident[] indexes */
 329#define EI_MAG1         1
 330#define EI_MAG2         2
 331#define EI_MAG3         3
 332#define EI_CLASS        4
 333#define EI_DATA         5
 334#define EI_VERSION      6
 335#define EI_OSABI        7
 336#define EI_PAD          8
 337
 338#define ELFMAG0         0x7f            /* EI_MAG */
 339#define ELFMAG1         'E'
 340#define ELFMAG2         'L'
 341#define ELFMAG3         'F'
 342#define ELFMAG          "\177ELF"
 343#define SELFMAG         4
 344
 345#define ELFCLASSNONE    0               /* EI_CLASS */
 346#define ELFCLASS32      1
 347#define ELFCLASS64      2
 348#define ELFCLASSNUM     3
 349
 350#define ELFDATANONE     0               /* e_ident[EI_DATA] */
 351#define ELFDATA2LSB     1
 352#define ELFDATA2MSB     2
 353
 354#define EV_NONE         0               /* e_version, EI_VERSION */
 355#define EV_CURRENT      1
 356#define EV_NUM          2
 357
 358#define ELFOSABI_NONE   0
 359#define ELFOSABI_LINUX  3
 360
 361#ifndef ELF_OSABI
 362#define ELF_OSABI ELFOSABI_NONE
 363#endif
 364
 365/*
 366 * Notes used in ET_CORE. Architectures export some of the arch register sets
 367 * using the corresponding note types via the PTRACE_GETREGSET and
 368 * PTRACE_SETREGSET requests.
 369 */
 370#define NT_PRSTATUS     1
 371#define NT_PRFPREG      2
 372#define NT_PRPSINFO     3
 373#define NT_TASKSTRUCT   4
 374#define NT_AUXV         6
 375#define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
 376#define NT_PPC_VMX      0x100           /* PowerPC Altivec/VMX registers */
 377#define NT_PPC_SPE      0x101           /* PowerPC SPE/EVR registers */
 378#define NT_PPC_VSX      0x102           /* PowerPC VSX registers */
 379#define NT_386_TLS      0x200           /* i386 TLS slots (struct user_desc) */
 380#define NT_386_IOPERM   0x201           /* x86 io permission bitmap (1=deny) */
 381#define NT_X86_XSTATE   0x202           /* x86 extended state using xsave */
 382#define NT_S390_HIGH_GPRS       0x300   /* s390 upper register halves */
 383#define NT_S390_TIMER   0x301           /* s390 timer register */
 384#define NT_S390_TODCMP  0x302           /* s390 TOD clock comparator register */
 385#define NT_S390_TODPREG 0x303           /* s390 TOD programmable register */
 386#define NT_S390_CTRS    0x304           /* s390 control registers */
 387#define NT_S390_PREFIX  0x305           /* s390 prefix register */
 388#define NT_S390_LAST_BREAK      0x306   /* s390 breaking event address */
 389#define NT_S390_SYSTEM_CALL     0x307   /* s390 system call restart data */
 390#define NT_ARM_VFP      0x400           /* ARM VFP/NEON registers */
 391
 392
 393/* Note header in a PT_NOTE section */
 394typedef struct elf32_note {
 395  Elf32_Word    n_namesz;       /* Name size */
 396  Elf32_Word    n_descsz;       /* Content size */
 397  Elf32_Word    n_type;         /* Content type */
 398} Elf32_Nhdr;
 399
 400/* Note header in a PT_NOTE section */
 401typedef struct elf64_note {
 402  Elf64_Word n_namesz;  /* Name size */
 403  Elf64_Word n_descsz;  /* Content size */
 404  Elf64_Word n_type;    /* Content type */
 405} Elf64_Nhdr;
 406
 407#ifdef __KERNEL__
 408#ifndef elf_read_implies_exec
 409  /* Executables for which elf_read_implies_exec() returns TRUE will
 410     have the READ_IMPLIES_EXEC personality flag set automatically.
 411     Override in asm/elf.h as needed.  */
 412# define elf_read_implies_exec(ex, have_pt_gnu_stack)   0
 413#endif
 414
 415#if ELF_CLASS == ELFCLASS32
 416
 417extern Elf32_Dyn _DYNAMIC [];
 418#define elfhdr          elf32_hdr
 419#define elf_phdr        elf32_phdr
 420#define elf_shdr        elf32_shdr
 421#define elf_note        elf32_note
 422#define elf_addr_t      Elf32_Off
 423#define Elf_Half        Elf32_Half
 424
 425#else
 426
 427extern Elf64_Dyn _DYNAMIC [];
 428#define elfhdr          elf64_hdr
 429#define elf_phdr        elf64_phdr
 430#define elf_shdr        elf64_shdr
 431#define elf_note        elf64_note
 432#define elf_addr_t      Elf64_Off
 433#define Elf_Half        Elf64_Half
 434
 435#endif
 436
 437/* Optional callbacks to write extra ELF notes. */
 438struct file;
 439
 440#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
 441static inline int elf_coredump_extra_notes_size(void) { return 0; }
 442static inline int elf_coredump_extra_notes_write(struct file *file,
 443                        loff_t *foffset) { return 0; }
 444#else
 445extern int elf_coredump_extra_notes_size(void);
 446extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset);
 447#endif
 448#endif /* __KERNEL__ */
 449#endif /* _LINUX_ELF_H */
 450
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.