1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _LINUX_ELF_H 3 #define _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 typedef __u16 Elf32_Versym; 15 16 /* 64-bit ELF base types. */ 17 typedef __u64 Elf64_Addr; 18 typedef __u16 Elf64_Half; 19 typedef __s16 Elf64_SHalf; 20 typedef __u64 Elf64_Off; 21 typedef __s32 Elf64_Sword; 22 typedef __u32 Elf64_Word; 23 typedef __u64 Elf64_Xword; 24 typedef __s64 Elf64_Sxword; 25 typedef __u16 Elf64_Versym; 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 (PT_LOOS + 0x474e550) 41 #define PT_GNU_STACK (PT_LOOS + 0x474e551) 42 #define PT_GNU_RELRO (PT_LOOS + 0x474e552) 43 #define PT_GNU_PROPERTY (PT_LOOS + 0x474e553) 44 45 46 /* ARM MTE memory tag segment type */ 47 #define PT_AARCH64_MEMTAG_MTE (PT_LOPROC + 0x2) 48 49 /* 50 * Extended Numbering 51 * 52 * If the real number of program header table entries is larger than 53 * or equal to PN_XNUM(0xffff), it is set to sh_info field of the 54 * section header at index 0, and PN_XNUM is set to e_phnum 55 * field. Otherwise, the section header at index 0 is zero 56 * initialized, if it exists. 57 * 58 * Specifications are available in: 59 * 60 * - Oracle: Linker and Libraries. 61 * Part No: 817–1984–19, August 2011. 62 * https://docs.oracle.com/cd/E18752_01/pdf/817-1984.pdf 63 * 64 * - System V ABI AMD64 Architecture Processor Supplement 65 * Draft Version 0.99.4, 66 * January 13, 2010. 67 * http://www.cs.washington.edu/education/courses/cse351/12wi/supp-docs/abi.pdf 68 */ 69 #define PN_XNUM 0xffff 70 71 /* These constants define the different elf file types */ 72 #define ET_NONE 0 73 #define ET_REL 1 74 #define ET_EXEC 2 75 #define ET_DYN 3 76 #define ET_CORE 4 77 #define ET_LOPROC 0xff00 78 #define ET_HIPROC 0xffff 79 80 /* This is the info that is needed to parse the dynamic section of the file */ 81 #define DT_NULL 0 82 #define DT_NEEDED 1 83 #define DT_PLTRELSZ 2 84 #define DT_PLTGOT 3 85 #define DT_HASH 4 86 #define DT_STRTAB 5 87 #define DT_SYMTAB 6 88 #define DT_RELA 7 89 #define DT_RELASZ 8 90 #define DT_RELAENT 9 91 #define DT_STRSZ 10 92 #define DT_SYMENT 11 93 #define DT_INIT 12 94 #define DT_FINI 13 95 #define DT_SONAME 14 96 #define DT_RPATH 15 97 #define DT_SYMBOLIC 16 98 #define DT_REL 17 99 #define DT_RELSZ 18 100 #define DT_RELENT 19 101 #define DT_PLTREL 20 102 #define DT_DEBUG 21 103 #define DT_TEXTREL 22 104 #define DT_JMPREL 23 105 #define DT_ENCODING 32 106 #define OLD_DT_LOOS 0x60000000 107 #define DT_LOOS 0x6000000d 108 #define DT_HIOS 0x6ffff000 109 #define DT_VALRNGLO 0x6ffffd00 110 #define DT_VALRNGHI 0x6ffffdff 111 #define DT_ADDRRNGLO 0x6ffffe00 112 #define DT_GNU_HASH 0x6ffffef5 113 #define DT_ADDRRNGHI 0x6ffffeff 114 #define DT_VERSYM 0x6ffffff0 115 #define DT_RELACOUNT 0x6ffffff9 116 #define DT_RELCOUNT 0x6ffffffa 117 #define DT_FLAGS_1 0x6ffffffb 118 #define DT_VERDEF 0x6ffffffc 119 #define DT_VERDEFNUM 0x6ffffffd 120 #define DT_VERNEED 0x6ffffffe 121 #define DT_VERNEEDNUM 0x6fffffff 122 #define OLD_DT_HIOS 0x6fffffff 123 #define DT_LOPROC 0x70000000 124 #define DT_HIPROC 0x7fffffff 125 126 /* This info is needed when parsing the symbol table */ 127 #define STB_LOCAL 0 128 #define STB_GLOBAL 1 129 #define STB_WEAK 2 130 131 #define STN_UNDEF 0 132 133 #define STT_NOTYPE 0 134 #define STT_OBJECT 1 135 #define STT_FUNC 2 136 #define STT_SECTION 3 137 #define STT_FILE 4 138 #define STT_COMMON 5 139 #define STT_TLS 6 140 141 #define VER_FLG_BASE 0x1 142 #define VER_FLG_WEAK 0x2 143 144 #define ELF_ST_BIND(x) ((x) >> 4) 145 #define ELF_ST_TYPE(x) ((x) & 0xf) 146 #define ELF32_ST_BIND(x) ELF_ST_BIND(x) 147 #define ELF32_ST_TYPE(x) ELF_ST_TYPE(x) 148 #define ELF64_ST_BIND(x) ELF_ST_BIND(x) 149 #define ELF64_ST_TYPE(x) ELF_ST_TYPE(x) 150 151 typedef struct { 152 Elf32_Sword d_tag; 153 union { 154 Elf32_Sword d_val; 155 Elf32_Addr d_ptr; 156 } d_un; 157 } Elf32_Dyn; 158 159 typedef struct { 160 Elf64_Sxword d_tag; /* entry tag value */ 161 union { 162 Elf64_Xword d_val; 163 Elf64_Addr d_ptr; 164 } d_un; 165 } Elf64_Dyn; 166 167 /* The following are used with relocations */ 168 #define ELF32_R_SYM(x) ((x) >> 8) 169 #define ELF32_R_TYPE(x) ((x) & 0xff) 170 171 #define ELF64_R_SYM(i) ((i) >> 32) 172 #define ELF64_R_TYPE(i) ((i) & 0xffffffff) 173 174 typedef struct elf32_rel { 175 Elf32_Addr r_offset; 176 Elf32_Word r_info; 177 } Elf32_Rel; 178 179 typedef struct elf64_rel { 180 Elf64_Addr r_offset; /* Location at which to apply the action */ 181 Elf64_Xword r_info; /* index and type of relocation */ 182 } Elf64_Rel; 183 184 typedef struct elf32_rela { 185 Elf32_Addr r_offset; 186 Elf32_Word r_info; 187 Elf32_Sword r_addend; 188 } Elf32_Rela; 189 190 typedef struct elf64_rela { 191 Elf64_Addr r_offset; /* Location at which to apply the action */ 192 Elf64_Xword r_info; /* index and type of relocation */ 193 Elf64_Sxword r_addend; /* Constant addend used to compute value */ 194 } Elf64_Rela; 195 196 typedef struct elf32_sym { 197 Elf32_Word st_name; 198 Elf32_Addr st_value; 199 Elf32_Word st_size; 200 unsigned char st_info; 201 unsigned char st_other; 202 Elf32_Half st_shndx; 203 } Elf32_Sym; 204 205 typedef struct elf64_sym { 206 Elf64_Word st_name; /* Symbol name, index in string tbl */ 207 unsigned char st_info; /* Type and binding attributes */ 208 unsigned char st_other; /* No defined meaning, 0 */ 209 Elf64_Half st_shndx; /* Associated section index */ 210 Elf64_Addr st_value; /* Value of the symbol */ 211 Elf64_Xword st_size; /* Associated symbol size */ 212 } Elf64_Sym; 213 214 215 #define EI_NIDENT 16 216 217 typedef struct elf32_hdr { 218 unsigned char e_ident[EI_NIDENT]; 219 Elf32_Half e_type; 220 Elf32_Half e_machine; 221 Elf32_Word e_version; 222 Elf32_Addr e_entry; /* Entry point */ 223 Elf32_Off e_phoff; 224 Elf32_Off e_shoff; 225 Elf32_Word e_flags; 226 Elf32_Half e_ehsize; 227 Elf32_Half e_phentsize; 228 Elf32_Half e_phnum; 229 Elf32_Half e_shentsize; 230 Elf32_Half e_shnum; 231 Elf32_Half e_shstrndx; 232 } Elf32_Ehdr; 233 234 typedef struct elf64_hdr { 235 unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */ 236 Elf64_Half e_type; 237 Elf64_Half e_machine; 238 Elf64_Word e_version; 239 Elf64_Addr e_entry; /* Entry point virtual address */ 240 Elf64_Off e_phoff; /* Program header table file offset */ 241 Elf64_Off e_shoff; /* Section header table file offset */ 242 Elf64_Word e_flags; 243 Elf64_Half e_ehsize; 244 Elf64_Half e_phentsize; 245 Elf64_Half e_phnum; 246 Elf64_Half e_shentsize; 247 Elf64_Half e_shnum; 248 Elf64_Half e_shstrndx; 249 } Elf64_Ehdr; 250 251 /* These constants define the permissions on sections in the program 252 header, p_flags. */ 253 #define PF_R 0x4 254 #define PF_W 0x2 255 #define PF_X 0x1 256 257 typedef struct elf32_phdr { 258 Elf32_Word p_type; 259 Elf32_Off p_offset; 260 Elf32_Addr p_vaddr; 261 Elf32_Addr p_paddr; 262 Elf32_Word p_filesz; 263 Elf32_Word p_memsz; 264 Elf32_Word p_flags; 265 Elf32_Word p_align; 266 } Elf32_Phdr; 267 268 typedef struct elf64_phdr { 269 Elf64_Word p_type; 270 Elf64_Word p_flags; 271 Elf64_Off p_offset; /* Segment file offset */ 272 Elf64_Addr p_vaddr; /* Segment virtual address */ 273 Elf64_Addr p_paddr; /* Segment physical address */ 274 Elf64_Xword p_filesz; /* Segment size in file */ 275 Elf64_Xword p_memsz; /* Segment size in memory */ 276 Elf64_Xword p_align; /* Segment alignment, file & memory */ 277 } Elf64_Phdr; 278 279 /* sh_type */ 280 #define SHT_NULL 0 281 #define SHT_PROGBITS 1 282 #define SHT_SYMTAB 2 283 #define SHT_STRTAB 3 284 #define SHT_RELA 4 285 #define SHT_HASH 5 286 #define SHT_DYNAMIC 6 287 #define SHT_NOTE 7 288 #define SHT_NOBITS 8 289 #define SHT_REL 9 290 #define SHT_SHLIB 10 291 #define SHT_DYNSYM 11 292 #define SHT_NUM 12 293 #define SHT_LOPROC 0x70000000 294 #define SHT_HIPROC 0x7fffffff 295 #define SHT_LOUSER 0x80000000 296 #define SHT_HIUSER 0xffffffff 297 298 /* sh_flags */ 299 #define SHF_WRITE 0x1 300 #define SHF_ALLOC 0x2 301 #define SHF_EXECINSTR 0x4 302 #define SHF_RELA_LIVEPATCH 0x00100000 303 #define SHF_RO_AFTER_INIT 0x00200000 304 #define SHF_MASKPROC 0xf0000000 305 306 /* special section indexes */ 307 #define SHN_UNDEF 0 308 #define SHN_LORESERVE 0xff00 309 #define SHN_LOPROC 0xff00 310 #define SHN_HIPROC 0xff1f 311 #define SHN_LIVEPATCH 0xff20 312 #define SHN_ABS 0xfff1 313 #define SHN_COMMON 0xfff2 314 #define SHN_HIRESERVE 0xffff 315 316 typedef struct elf32_shdr { 317 Elf32_Word sh_name; 318 Elf32_Word sh_type; 319 Elf32_Word sh_flags; 320 Elf32_Addr sh_addr; 321 Elf32_Off sh_offset; 322 Elf32_Word sh_size; 323 Elf32_Word sh_link; 324 Elf32_Word sh_info; 325 Elf32_Word sh_addralign; 326 Elf32_Word sh_entsize; 327 } Elf32_Shdr; 328 329 typedef struct elf64_shdr { 330 Elf64_Word sh_name; /* Section name, index in string tbl */ 331 Elf64_Word sh_type; /* Type of section */ 332 Elf64_Xword sh_flags; /* Miscellaneous section attributes */ 333 Elf64_Addr sh_addr; /* Section virtual addr at execution */ 334 Elf64_Off sh_offset; /* Section file offset */ 335 Elf64_Xword sh_size; /* Size of section in bytes */ 336 Elf64_Word sh_link; /* Index of another section */ 337 Elf64_Word sh_info; /* Additional section information */ 338 Elf64_Xword sh_addralign; /* Section alignment */ 339 Elf64_Xword sh_entsize; /* Entry size if section holds table */ 340 } Elf64_Shdr; 341 342 #define EI_MAG0 0 /* e_ident[] indexes */ 343 #define EI_MAG1 1 344 #define EI_MAG2 2 345 #define EI_MAG3 3 346 #define EI_CLASS 4 347 #define EI_DATA 5 348 #define EI_VERSION 6 349 #define EI_OSABI 7 350 #define EI_PAD 8 351 352 #define ELFMAG0 0x7f /* EI_MAG */ 353 #define ELFMAG1 'E' 354 #define ELFMAG2 'L' 355 #define ELFMAG3 'F' 356 #define ELFMAG "\177ELF" 357 #define SELFMAG 4 358 359 #define ELFCLASSNONE 0 /* EI_CLASS */ 360 #define ELFCLASS32 1 361 #define ELFCLASS64 2 362 #define ELFCLASSNUM 3 363 364 #define ELFDATANONE 0 /* e_ident[EI_DATA] */ 365 #define ELFDATA2LSB 1 366 #define ELFDATA2MSB 2 367 368 #define EV_NONE 0 /* e_version, EI_VERSION */ 369 #define EV_CURRENT 1 370 #define EV_NUM 2 371 372 #define ELFOSABI_NONE 0 373 #define ELFOSABI_LINUX 3 374 375 #ifndef ELF_OSABI 376 #define ELF_OSABI ELFOSABI_NONE 377 #endif 378 379 /* 380 * Notes used in ET_CORE. Architectures export some of the arch register sets 381 * using the corresponding note types via the PTRACE_GETREGSET and 382 * PTRACE_SETREGSET requests. 383 * The note name for these types is "LINUX", except NT_PRFPREG that is named 384 * "CORE". 385 */ 386 #define NT_PRSTATUS 1 387 #define NT_PRFPREG 2 388 #define NT_PRPSINFO 3 389 #define NT_TASKSTRUCT 4 390 #define NT_AUXV 6 391 /* 392 * Note to userspace developers: size of NT_SIGINFO note may increase 393 * in the future to accomodate more fields, don't assume it is fixed! 394 */ 395 #define NT_SIGINFO 0x53494749 396 #define NT_FILE 0x46494c45 397 #define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */ 398 #define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */ 399 #define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */ 400 #define NT_PPC_VSX 0x102 /* PowerPC VSX registers */ 401 #define NT_PPC_TAR 0x103 /* Target Address Register */ 402 #define NT_PPC_PPR 0x104 /* Program Priority Register */ 403 #define NT_PPC_DSCR 0x105 /* Data Stream Control Register */ 404 #define NT_PPC_EBB 0x106 /* Event Based Branch Registers */ 405 #define NT_PPC_PMU 0x107 /* Performance Monitor Registers */ 406 #define NT_PPC_TM_CGPR 0x108 /* TM checkpointed GPR Registers */ 407 #define NT_PPC_TM_CFPR 0x109 /* TM checkpointed FPR Registers */ 408 #define NT_PPC_TM_CVMX 0x10a /* TM checkpointed VMX Registers */ 409 #define NT_PPC_TM_CVSX 0x10b /* TM checkpointed VSX Registers */ 410 #define NT_PPC_TM_SPR 0x10c /* TM Special Purpose Registers */ 411 #define NT_PPC_TM_CTAR 0x10d /* TM checkpointed Target Address Register */ 412 #define NT_PPC_TM_CPPR 0x10e /* TM checkpointed Program Priority Register */ 413 #define NT_PPC_TM_CDSCR 0x10f /* TM checkpointed Data Stream Control Register */ 414 #define NT_PPC_PKEY 0x110 /* Memory Protection Keys registers */ 415 #define NT_PPC_DEXCR 0x111 /* PowerPC DEXCR registers */ 416 #define NT_PPC_HASHKEYR 0x112 /* PowerPC HASHKEYR register */ 417 #define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */ 418 #define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */ 419 #define NT_X86_XSTATE 0x202 /* x86 extended state using xsave */ 420 /* Old binutils treats 0x203 as a CET state */ 421 #define NT_X86_SHSTK 0x204 /* x86 SHSTK state */ 422 #define NT_X86_XSAVE_LAYOUT 0x205 /* XSAVE layout description */ 423 #define NT_S390_HIGH_GPRS 0x300 /* s390 upper register halves */ 424 #define NT_S390_TIMER 0x301 /* s390 timer register */ 425 #define NT_S390_TODCMP 0x302 /* s390 TOD clock comparator register */ 426 #define NT_S390_TODPREG 0x303 /* s390 TOD programmable register */ 427 #define NT_S390_CTRS 0x304 /* s390 control registers */ 428 #define NT_S390_PREFIX 0x305 /* s390 prefix register */ 429 #define NT_S390_LAST_BREAK 0x306 /* s390 breaking event address */ 430 #define NT_S390_SYSTEM_CALL 0x307 /* s390 system call restart data */ 431 #define NT_S390_TDB 0x308 /* s390 transaction diagnostic block */ 432 #define NT_S390_VXRS_LOW 0x309 /* s390 vector registers 0-15 upper half */ 433 #define NT_S390_VXRS_HIGH 0x30a /* s390 vector registers 16-31 */ 434 #define NT_S390_GS_CB 0x30b /* s390 guarded storage registers */ 435 #define NT_S390_GS_BC 0x30c /* s390 guarded storage broadcast control block */ 436 #define NT_S390_RI_CB 0x30d /* s390 runtime instrumentation */ 437 #define NT_S390_PV_CPU_DATA 0x30e /* s390 protvirt cpu dump data */ 438 #define NT_ARM_VFP 0x400 /* ARM VFP/NEON registers */ 439 #define NT_ARM_TLS 0x401 /* ARM TLS register */ 440 #define NT_ARM_HW_BREAK 0x402 /* ARM hardware breakpoint registers */ 441 #define NT_ARM_HW_WATCH 0x403 /* ARM hardware watchpoint registers */ 442 #define NT_ARM_SYSTEM_CALL 0x404 /* ARM system call number */ 443 #define NT_ARM_SVE 0x405 /* ARM Scalable Vector Extension registers */ 444 #define NT_ARM_PAC_MASK 0x406 /* ARM pointer authentication code masks */ 445 #define NT_ARM_PACA_KEYS 0x407 /* ARM pointer authentication address keys */ 446 #define NT_ARM_PACG_KEYS 0x408 /* ARM pointer authentication generic key */ 447 #define NT_ARM_TAGGED_ADDR_CTRL 0x409 /* arm64 tagged address control (prctl()) */ 448 #define NT_ARM_PAC_ENABLED_KEYS 0x40a /* arm64 ptr auth enabled keys (prctl()) */ 449 #define NT_ARM_SSVE 0x40b /* ARM Streaming SVE registers */ 450 #define NT_ARM_ZA 0x40c /* ARM SME ZA registers */ 451 #define NT_ARM_ZT 0x40d /* ARM SME ZT registers */ 452 #define NT_ARM_FPMR 0x40e /* ARM floating point mode register */ 453 #define NT_ARM_POE 0x40f /* ARM POE registers */ 454 #define NT_ARM_GCS 0x410 /* ARM GCS state */ 455 #define NT_ARC_V2 0x600 /* ARCv2 accumulator/extra registers */ 456 #define NT_VMCOREDD 0x700 /* Vmcore Device Dump Note */ 457 #define NT_MIPS_DSP 0x800 /* MIPS DSP ASE registers */ 458 #define NT_MIPS_FP_MODE 0x801 /* MIPS floating-point mode */ 459 #define NT_MIPS_MSA 0x802 /* MIPS SIMD registers */ 460 #define NT_RISCV_CSR 0x900 /* RISC-V Control and Status Registers */ 461 #define NT_RISCV_VECTOR 0x901 /* RISC-V vector registers */ 462 #define NT_RISCV_TAGGED_ADDR_CTRL 0x902 /* RISC-V tagged address control (prctl()) */ 463 #define NT_LOONGARCH_CPUCFG 0xa00 /* LoongArch CPU config registers */ 464 #define NT_LOONGARCH_CSR 0xa01 /* LoongArch control and status registers */ 465 #define NT_LOONGARCH_LSX 0xa02 /* LoongArch Loongson SIMD Extension registers */ 466 #define NT_LOONGARCH_LASX 0xa03 /* LoongArch Loongson Advanced SIMD Extension registers */ 467 #define NT_LOONGARCH_LBT 0xa04 /* LoongArch Loongson Binary Translation registers */ 468 #define NT_LOONGARCH_HW_BREAK 0xa05 /* LoongArch hardware breakpoint registers */ 469 #define NT_LOONGARCH_HW_WATCH 0xa06 /* LoongArch hardware watchpoint registers */ 470 471 /* Note types with note name "GNU" */ 472 #define NT_GNU_PROPERTY_TYPE_0 5 473 474 /* Note header in a PT_NOTE section */ 475 typedef struct elf32_note { 476 Elf32_Word n_namesz; /* Name size */ 477 Elf32_Word n_descsz; /* Content size */ 478 Elf32_Word n_type; /* Content type */ 479 } Elf32_Nhdr; 480 481 /* Note header in a PT_NOTE section */ 482 typedef struct elf64_note { 483 Elf64_Word n_namesz; /* Name size */ 484 Elf64_Word n_descsz; /* Content size */ 485 Elf64_Word n_type; /* Content type */ 486 } Elf64_Nhdr; 487 488 /* .note.gnu.property types for EM_AARCH64: */ 489 #define GNU_PROPERTY_AARCH64_FEATURE_1_AND 0xc0000000 490 491 /* Bits for GNU_PROPERTY_AARCH64_FEATURE_1_BTI */ 492 #define GNU_PROPERTY_AARCH64_FEATURE_1_BTI (1U << 0) 493 494 typedef struct { 495 Elf32_Half vd_version; 496 Elf32_Half vd_flags; 497 Elf32_Half vd_ndx; 498 Elf32_Half vd_cnt; 499 Elf32_Word vd_hash; 500 Elf32_Word vd_aux; 501 Elf32_Word vd_next; 502 } Elf32_Verdef; 503 504 typedef struct { 505 Elf64_Half vd_version; 506 Elf64_Half vd_flags; 507 Elf64_Half vd_ndx; 508 Elf64_Half vd_cnt; 509 Elf64_Word vd_hash; 510 Elf64_Word vd_aux; 511 Elf64_Word vd_next; 512 } Elf64_Verdef; 513 514 typedef struct { 515 Elf32_Word vda_name; 516 Elf32_Word vda_next; 517 } Elf32_Verdaux; 518 519 typedef struct { 520 Elf64_Word vda_name; 521 Elf64_Word vda_next; 522 } Elf64_Verdaux; 523 524 #endif /* _LINUX_ELF_H */ 525