linux/include/uapi/linux/elf.h
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   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. */
   9typedef __u32   Elf32_Addr;
  10typedef __u16   Elf32_Half;
  11typedef __u32   Elf32_Off;
  12typedef __s32   Elf32_Sword;
  13typedef __u32   Elf32_Word;
  14
  15/* 64-bit ELF base types. */
  16typedef __u64   Elf64_Addr;
  17typedef __u16   Elf64_Half;
  18typedef __s16   Elf64_SHalf;
  19typedef __u64   Elf64_Off;
  20typedef __s32   Elf64_Sword;
  21typedef __u32   Elf64_Word;
  22typedef __u64   Elf64_Xword;
  23typedef __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
 138typedef 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
 146typedef 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
 161typedef struct elf32_rel {
 162  Elf32_Addr    r_offset;
 163  Elf32_Word    r_info;
 164} Elf32_Rel;
 165
 166typedef 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
 171typedef struct elf32_rela{
 172  Elf32_Addr    r_offset;
 173  Elf32_Word    r_info;
 174  Elf32_Sword   r_addend;
 175} Elf32_Rela;
 176
 177typedef 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
 183typedef 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
 192typedef 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
 204typedef 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
 221typedef 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
 244typedef 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
 255typedef 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 
 303typedef 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
 316typedef 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_ARM_PAC_MASK         0x406   /* ARM pointer authentication code masks */
 424#define NT_ARM_PACA_KEYS        0x407   /* ARM pointer authentication address keys */
 425#define NT_ARM_PACG_KEYS        0x408   /* ARM pointer authentication generic key */
 426#define NT_ARC_V2       0x600           /* ARCv2 accumulator/extra registers */
 427#define NT_VMCOREDD     0x700           /* Vmcore Device Dump Note */
 428#define NT_MIPS_DSP     0x800           /* MIPS DSP ASE registers */
 429#define NT_MIPS_FP_MODE 0x801           /* MIPS floating-point mode */
 430#define NT_MIPS_MSA     0x802           /* MIPS SIMD registers */
 431
 432/* Note header in a PT_NOTE section */
 433typedef struct elf32_note {
 434  Elf32_Word    n_namesz;       /* Name size */
 435  Elf32_Word    n_descsz;       /* Content size */
 436  Elf32_Word    n_type;         /* Content type */
 437} Elf32_Nhdr;
 438
 439/* Note header in a PT_NOTE section */
 440typedef struct elf64_note {
 441  Elf64_Word n_namesz;  /* Name size */
 442  Elf64_Word n_descsz;  /* Content size */
 443  Elf64_Word n_type;    /* Content type */
 444} Elf64_Nhdr;
 445
 446#endif /* _UAPI_LINUX_ELF_H */
 447