include/uapi/linux/elf.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI_LINUX_ELF_H
   3 #define _UAPI_LINUX_ELF_H
   4
   5 #include <linux/types.h>
   6 #include <linux/elf-em.h>
   7
   8 /* 32-bit ELF base types. */
   9 typedef __u32   Elf32_Addr;
  10 typedef __u16   Elf32_Half;
  11 typedef __u32   Elf32_Off;
  12 typedef __s32   Elf32_Sword;
  13 typedef __u32   Elf32_Word;
  14
  15 /* 64-bit ELF base types. */
  16 typedef __u64   Elf64_Addr;
  17 typedef __u16   Elf64_Half;
  18 typedef __s16   Elf64_SHalf;
  19 typedef __u64   Elf64_Off;
  20 typedef __s32   Elf64_Sword;
  21 typedef __u32   Elf64_Word;
  22 typedef __u64   Elf64_Xword;
  23 typedef __s64   Elf64_Sxword;
  24
  25 /* These constants are for the segment types stored in the image headers */
  26 #define PT_NULL    0
  27 #define PT_LOAD    1
  28 #define PT_DYNAMIC 2
  29 #define PT_INTERP  3
  30 #define PT_NOTE    4
  31 #define PT_SHLIB   5
  32 #define PT_PHDR    6
  33 #define PT_TLS     7               /* Thread local storage segment */
  34 #define PT_LOOS    0x60000000      /* OS-specific */
  35 #define PT_HIOS    0x6fffffff      /* OS-specific */
  36 #define PT_LOPROC  0x70000000
  37 #define PT_HIPROC  0x7fffffff
  38 #define PT_GNU_EH_FRAME         0x6474e550
  39
  40 #define PT_GNU_STACK    (PT_LOOS + 0x474e551)
  41
  42 /*
  43  * Extended Numbering
  44  *
  45  * If the real number of program header table entries is larger than
  46  * or equal to PN_XNUM(0xffff), it is set to sh_info field of the
  47  * section header at index 0, and PN_XNUM is set to e_phnum
  48  * field. Otherwise, the section header at index 0 is zero
  49  * initialized, if it exists.
  50  *
  51  * Specifications are available in:
  52  *
  53  * - Oracle: Linker and Libraries.
  54  *   Part No: 817–1984–19, August 2011.
  55  *   http://docs.oracle.com/cd/E18752_01/pdf/817-1984.pdf
  56  *
  57  * - System V ABI AMD64 Architecture Processor Supplement
  58  *   Draft Version 0.99.4,
  59  *   January 13, 2010.
  60  *   http://www.cs.washington.edu/education/courses/cse351/12wi/supp-docs/abi.pdf
  61  */
  62 #define PN_XNUM 0xffff
  63
  64 /* These constants define the different elf file types */
  65 #define ET_NONE   0
  66 #define ET_REL    1
  67 #define ET_EXEC   2
  68 #define ET_DYN    3
  69 #define ET_CORE   4
  70 #define ET_LOPROC 0xff00
  71 #define ET_HIPROC 0xffff
  72
  73 /* This is the info that is needed to parse the dynamic section of the file */
  74 #define DT_NULL         0
  75 #define DT_NEEDED       1
  76 #define DT_PLTRELSZ     2
  77 #define DT_PLTGOT       3
  78 #define DT_HASH         4
  79 #define DT_STRTAB       5
  80 #define DT_SYMTAB       6
  81 #define DT_RELA         7
  82 #define DT_RELASZ       8
  83 #define DT_RELAENT      9
  84 #define DT_STRSZ        10
  85 #define DT_SYMENT       11
  86 #define DT_INIT         12
  87 #define DT_FINI         13
  88 #define DT_SONAME       14
  89 #define DT_RPATH        15
  90 #define DT_SYMBOLIC     16
  91 #define DT_REL          17
  92 #define DT_RELSZ        18
  93 #define DT_RELENT       19
  94 #define DT_PLTREL       20
  95 #define DT_DEBUG        21
  96 #define DT_TEXTREL      22
  97 #define DT_JMPREL       23
  98 #define DT_ENCODING     32
  99 #define OLD_DT_LOOS     0x60000000
 100 #define DT_LOOS         0x6000000d
 101 #define DT_HIOS         0x6ffff000
 102 #define DT_VALRNGLO     0x6ffffd00
 103 #define DT_VALRNGHI     0x6ffffdff
 104 #define DT_ADDRRNGLO    0x6ffffe00
 105 #define DT_ADDRRNGHI    0x6ffffeff
 106 #define DT_VERSYM       0x6ffffff0
 107 #define DT_RELACOUNT    0x6ffffff9
 108 #define DT_RELCOUNT     0x6ffffffa
 109 #define DT_FLAGS_1      0x6ffffffb
 110 #define DT_VERDEF       0x6ffffffc
 111 #define DT_VERDEFNUM    0x6ffffffd
 112 #define DT_VERNEED      0x6ffffffe
 113 #define DT_VERNEEDNUM   0x6fffffff
 114 #define OLD_DT_HIOS     0x6fffffff
 115 #define DT_LOPROC       0x70000000
 116 #define DT_HIPROC       0x7fffffff
 117
 118 /* This info is needed when parsing the symbol table */
 119 #define STB_LOCAL  0
 120 #define STB_GLOBAL 1
 121 #define STB_WEAK   2
 122
 123 #define STT_NOTYPE  0
 124 #define STT_OBJECT  1
 125 #define STT_FUNC    2
 126 #define STT_SECTION 3
 127 #define STT_FILE    4
 128 #define STT_COMMON  5
 129 #define STT_TLS     6
 130
 131 #define ELF_ST_BIND(x)          ((x) >> 4)
 132 #define ELF_ST_TYPE(x)          (((unsigned int) x) & 0xf)
 133 #define ELF32_ST_BIND(x)        ELF_ST_BIND(x)
 134 #define ELF32_ST_TYPE(x)        ELF_ST_TYPE(x)
 135 #define ELF64_ST_BIND(x)        ELF_ST_BIND(x)
 136 #define ELF64_ST_TYPE(x)        ELF_ST_TYPE(x)
 137
 138 typedef struct dynamic{
 139   Elf32_Sword d_tag;
 140   union{
 141     Elf32_Sword d_val;
 142     Elf32_Addr  d_ptr;
 143   } d_un;
 144 } Elf32_Dyn;
 145
 146 typedef struct {
 147   Elf64_Sxword d_tag;           /* entry tag value */
 148   union {
 149     Elf64_Xword d_val;
 150     Elf64_Addr d_ptr;
 151   } d_un;
 152 } Elf64_Dyn;
 153
 154 /* The following are used with relocations */
 155 #define ELF32_R_SYM(x) ((x) >> 8)
 156 #define ELF32_R_TYPE(x) ((x) & 0xff)
 157
 158 #define ELF64_R_SYM(i)                  ((i) >> 32)
 159 #define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
 160
 161 typedef struct elf32_rel {
 162   Elf32_Addr    r_offset;
 163   Elf32_Word    r_info;
 164 } Elf32_Rel;
 165
 166 typedef struct elf64_rel {
 167   Elf64_Addr r_offset;  /* Location at which to apply the action */
 168   Elf64_Xword r_info;   /* index and type of relocation */
 169 } Elf64_Rel;
 170
 171 typedef struct elf32_rela{
 172   Elf32_Addr    r_offset;
 173   Elf32_Word    r_info;
 174   Elf32_Sword   r_addend;
 175 } Elf32_Rela;
 176
 177 typedef struct elf64_rela {
 178   Elf64_Addr r_offset;  /* Location at which to apply the action */
 179   Elf64_Xword r_info;   /* index and type of relocation */
 180   Elf64_Sxword r_addend;        /* Constant addend used to compute value */
 181 } Elf64_Rela;
 182
 183 typedef struct elf32_sym{
 184   Elf32_Word    st_name;
 185   Elf32_Addr    st_value;
 186   Elf32_Word    st_size;
 187   unsigned char st_info;
 188   unsigned char st_other;
 189   Elf32_Half    st_shndx;
 190 } Elf32_Sym;
 191
 192 typedef struct elf64_sym {
 193   Elf64_Word st_name;           /* Symbol name, index in string tbl */
 194   unsigned char st_info;        /* Type and binding attributes */
 195   unsigned char st_other;       /* No defined meaning, 0 */
 196   Elf64_Half st_shndx;          /* Associated section index */
 197   Elf64_Addr st_value;          /* Value of the symbol */
 198   Elf64_Xword st_size;          /* Associated symbol size */
 199 } Elf64_Sym;
 200
 201
 202 #define EI_NIDENT       16
 203
 204 typedef struct elf32_hdr{
 205   unsigned char e_ident[EI_NIDENT];
 206   Elf32_Half    e_type;
 207   Elf32_Half    e_machine;
 208   Elf32_Word    e_version;
 209   Elf32_Addr    e_entry;  /* Entry point */
 210   Elf32_Off     e_phoff;
 211   Elf32_Off     e_shoff;
 212   Elf32_Word    e_flags;
 213   Elf32_Half    e_ehsize;
 214   Elf32_Half    e_phentsize;
 215   Elf32_Half    e_phnum;
 216   Elf32_Half    e_shentsize;
 217   Elf32_Half    e_shnum;
 218   Elf32_Half    e_shstrndx;
 219 } Elf32_Ehdr;
 220
 221 typedef struct elf64_hdr {
 222   unsigned char e_ident[EI_NIDENT];     /* ELF "magic number" */
 223   Elf64_Half e_type;
 224   Elf64_Half e_machine;
 225   Elf64_Word e_version;
 226   Elf64_Addr e_entry;           /* Entry point virtual address */
 227   Elf64_Off e_phoff;            /* Program header table file offset */
 228   Elf64_Off e_shoff;            /* Section header table file offset */
 229   Elf64_Word e_flags;
 230   Elf64_Half e_ehsize;
 231   Elf64_Half e_phentsize;
 232   Elf64_Half e_phnum;
 233   Elf64_Half e_shentsize;
 234   Elf64_Half e_shnum;
 235   Elf64_Half e_shstrndx;
 236 } Elf64_Ehdr;
 237
 238 /* These constants define the permissions on sections in the program
 239    header, p_flags. */
 240 #define PF_R            0x4
 241 #define PF_W            0x2
 242 #define PF_X            0x1
 243
 244 typedef struct elf32_phdr{
 245   Elf32_Word    p_type;
 246   Elf32_Off     p_offset;
 247   Elf32_Addr    p_vaddr;
 248   Elf32_Addr    p_paddr;
 249   Elf32_Word    p_filesz;
 250   Elf32_Word    p_memsz;
 251   Elf32_Word    p_flags;
 252   Elf32_Word    p_align;
 253 } Elf32_Phdr;
 254
 255 typedef struct elf64_phdr {
 256   Elf64_Word p_type;
 257   Elf64_Word p_flags;
 258   Elf64_Off p_offset;           /* Segment file offset */
 259   Elf64_Addr p_vaddr;           /* Segment virtual address */
 260   Elf64_Addr p_paddr;           /* Segment physical address */
 261   Elf64_Xword p_filesz;         /* Segment size in file */
 262   Elf64_Xword p_memsz;          /* Segment size in memory */
 263   Elf64_Xword p_align;          /* Segment alignment, file & memory */
 264 } Elf64_Phdr;
 265
 266 /* sh_type */
 267 #define SHT_NULL        0
 268 #define SHT_PROGBITS    1
 269 #define SHT_SYMTAB      2
 270 #define SHT_STRTAB      3
 271 #define SHT_RELA        4
 272 #define SHT_HASH        5
 273 #define SHT_DYNAMIC     6
 274 #define SHT_NOTE        7
 275 #define SHT_NOBITS      8
 276 #define SHT_REL         9
 277 #define SHT_SHLIB       10
 278 #define SHT_DYNSYM      11
 279 #define SHT_NUM         12
 280 #define SHT_LOPROC      0x70000000
 281 #define SHT_HIPROC      0x7fffffff
 282 #define SHT_LOUSER      0x80000000
 283 #define SHT_HIUSER      0xffffffff
 284
 285 /* sh_flags */
 286 #define SHF_WRITE               0x1
 287 #define SHF_ALLOC               0x2
 288 #define SHF_EXECINSTR           0x4
 289 #define SHF_RELA_LIVEPATCH      0x00100000
 290 #define SHF_RO_AFTER_INIT       0x00200000
 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_LIVEPATCH   0xff20
 299 #define SHN_ABS         0xfff1
 300 #define SHN_COMMON      0xfff2
 301 #define SHN_HIRESERVE   0xffff
 302
 303 typedef struct elf32_shdr {
 304   Elf32_Word    sh_name;
 305   Elf32_Word    sh_type;
 306   Elf32_Word    sh_flags;
 307   Elf32_Addr    sh_addr;
 308   Elf32_Off     sh_offset;
 309   Elf32_Word    sh_size;
 310   Elf32_Word    sh_link;
 311   Elf32_Word    sh_info;
 312   Elf32_Word    sh_addralign;
 313   Elf32_Word    sh_entsize;
 314 } Elf32_Shdr;
 315
 316 typedef struct elf64_shdr {
 317   Elf64_Word sh_name;           /* Section name, index in string tbl */
 318   Elf64_Word sh_type;           /* Type of section */
 319   Elf64_Xword sh_flags;         /* Miscellaneous section attributes */
 320   Elf64_Addr sh_addr;           /* Section virtual addr at execution */
 321   Elf64_Off sh_offset;          /* Section file offset */
 322   Elf64_Xword sh_size;          /* Size of section in bytes */
 323   Elf64_Word sh_link;           /* Index of another section */
 324   Elf64_Word sh_info;           /* Additional section information */
 325   Elf64_Xword sh_addralign;     /* Section alignment */
 326   Elf64_Xword sh_entsize;       /* Entry size if section holds table */
 327 } Elf64_Shdr;
 328
 329 #define EI_MAG0         0               /* e_ident[] indexes */
 330 #define EI_MAG1         1
 331 #define EI_MAG2         2
 332 #define EI_MAG3         3
 333 #define EI_CLASS        4
 334 #define EI_DATA         5
 335 #define EI_VERSION      6
 336 #define EI_OSABI        7
 337 #define EI_PAD          8
 338
 339 #define ELFMAG0         0x7f            /* EI_MAG */
 340 #define ELFMAG1         'E'
 341 #define ELFMAG2         'L'
 342 #define ELFMAG3         'F'
 343 #define ELFMAG          "\177ELF"
 344 #define SELFMAG         4
 345
 346 #define ELFCLASSNONE    0               /* EI_CLASS */
 347 #define ELFCLASS32      1
 348 #define ELFCLASS64      2
 349 #define ELFCLASSNUM     3
 350
 351 #define ELFDATANONE     0               /* e_ident[EI_DATA] */
 352 #define ELFDATA2LSB     1
 353 #define ELFDATA2MSB     2
 354
 355 #define EV_NONE         0               /* e_version, EI_VERSION */
 356 #define EV_CURRENT      1
 357 #define EV_NUM          2
 358
 359 #define ELFOSABI_NONE   0
 360 #define ELFOSABI_LINUX  3
 361
 362 #ifndef ELF_OSABI
 363 #define ELF_OSABI ELFOSABI_NONE
 364 #endif
 365
 366 /*
 367  * Notes used in ET_CORE. Architectures export some of the arch register sets
 368  * using the corresponding note types via the PTRACE_GETREGSET and
 369  * PTRACE_SETREGSET requests.
 370  */
 371 #define NT_PRSTATUS     1
 372 #define NT_PRFPREG      2
 373 #define NT_PRPSINFO     3
 374 #define NT_TASKSTRUCT   4
 375 #define NT_AUXV         6
 376 /*
 377  * Note to userspace developers: size of NT_SIGINFO note may increase
 378  * in the future to accomodate more fields, don't assume it is fixed!
 379  */
 380 #define NT_SIGINFO      0x53494749
 381 #define NT_FILE         0x46494c45
 382 #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
 383 #define NT_PPC_VMX      0x100           /* PowerPC Altivec/VMX registers */
 384 #define NT_PPC_SPE      0x101           /* PowerPC SPE/EVR registers */
 385 #define NT_PPC_VSX      0x102           /* PowerPC VSX registers */
 386 #define NT_PPC_TAR      0x103           /* Target Address Register */
 387 #define NT_PPC_PPR      0x104           /* Program Priority Register */
 388 #define NT_PPC_DSCR     0x105           /* Data Stream Control Register */
 389 #define NT_PPC_EBB      0x106           /* Event Based Branch Registers */
 390 #define NT_PPC_PMU      0x107           /* Performance Monitor Registers */
 391 #define NT_PPC_TM_CGPR  0x108           /* TM checkpointed GPR Registers */
 392 #define NT_PPC_TM_CFPR  0x109           /* TM checkpointed FPR Registers */
 393 #define NT_PPC_TM_CVMX  0x10a           /* TM checkpointed VMX Registers */
 394 #define NT_PPC_TM_CVSX  0x10b           /* TM checkpointed VSX Registers */
 395 #define NT_PPC_TM_SPR   0x10c           /* TM Special Purpose Registers */
 396 #define NT_PPC_TM_CTAR  0x10d           /* TM checkpointed Target Address Register */
 397 #define NT_PPC_TM_CPPR  0x10e           /* TM checkpointed Program Priority Register */
 398 #define NT_PPC_TM_CDSCR 0x10f           /* TM checkpointed Data Stream Control Register */
 399 #define NT_PPC_PKEY     0x110           /* Memory Protection Keys registers */
 400 #define NT_386_TLS      0x200           /* i386 TLS slots (struct user_desc) */
 401 #define NT_386_IOPERM   0x201           /* x86 io permission bitmap (1=deny) */
 402 #define NT_X86_XSTATE   0x202           /* x86 extended state using xsave */
 403 #define NT_S390_HIGH_GPRS       0x300   /* s390 upper register halves */
 404 #define NT_S390_TIMER   0x301           /* s390 timer register */
 405 #define NT_S390_TODCMP  0x302           /* s390 TOD clock comparator register */
 406 #define NT_S390_TODPREG 0x303           /* s390 TOD programmable register */
 407 #define NT_S390_CTRS    0x304           /* s390 control registers */
 408 #define NT_S390_PREFIX  0x305           /* s390 prefix register */
 409 #define NT_S390_LAST_BREAK      0x306   /* s390 breaking event address */
 410 #define NT_S390_SYSTEM_CALL     0x307   /* s390 system call restart data */
 411 #define NT_S390_TDB     0x308           /* s390 transaction diagnostic block */
 412 #define NT_S390_VXRS_LOW        0x309   /* s390 vector registers 0-15 upper half */
 413 #define NT_S390_VXRS_HIGH       0x30a   /* s390 vector registers 16-31 */
 414 #define NT_S390_GS_CB   0x30b           /* s390 guarded storage registers */
 415 #define NT_S390_GS_BC   0x30c           /* s390 guarded storage broadcast control block */
 416 #define NT_S390_RI_CB   0x30d           /* s390 runtime instrumentation */
 417 #define NT_ARM_VFP      0x400           /* ARM VFP/NEON registers */
 418 #define NT_ARM_TLS      0x401           /* ARM TLS register */
 419 #define NT_ARM_HW_BREAK 0x402           /* ARM hardware breakpoint registers */
 420 #define NT_ARM_HW_WATCH 0x403           /* ARM hardware watchpoint registers */
 421 #define NT_ARM_SYSTEM_CALL      0x404   /* ARM system call number */
 422 #define NT_ARM_SVE      0x405           /* ARM Scalable Vector Extension registers */
 423 #define NT_METAG_CBUF   0x500           /* Metag catch buffer registers */
 424 #define NT_METAG_RPIPE  0x501           /* Metag read pipeline state */
 425 #define NT_METAG_TLS    0x502           /* Metag TLS pointer */
 426 #define NT_ARC_V2       0x600           /* ARCv2 accumulator/extra registers */
 427
 428 /* Note header in a PT_NOTE section */
 429 typedef struct elf32_note {
 430   Elf32_Word    n_namesz;       /* Name size */
 431   Elf32_Word    n_descsz;       /* Content size */
 432   Elf32_Word    n_type;         /* Content type */
 433 } Elf32_Nhdr;
 434
 435 /* Note header in a PT_NOTE section */
 436 typedef struct elf64_note {
 437   Elf64_Word n_namesz;  /* Name size */
 438   Elf64_Word n_descsz;  /* Content size */
 439   Elf64_Word n_type;    /* Content type */
 440 } Elf64_Nhdr;
 441
 442 #endif /* _UAPI_LINUX_ELF_H */