Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/exec_elf.h
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1 /* $OpenBSD: exec_elf.h,v 1.97 2022/10/27 23:17:18 deraadt Exp $ */ 2 /* 3 * Copyright (c) 1995, 1996 Erik Theisen. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * This is the ELF ABI header file 30 * formerly known as "elf_abi.h". 31 */ 32 33 #ifndef _SYS_EXEC_ELF_H_ 34 #define _SYS_EXEC_ELF_H_ 35 36 #include <sys/types.h> 37 #include <machine/exec.h> 38 39 typedef __uint32_t Elf32_Addr; /* Unsigned program address */ 40 typedef __uint32_t Elf32_Off; /* Unsigned file offset */ 41 typedef __int32_t Elf32_Sword; /* Signed large integer */ 42 typedef __uint32_t Elf32_Word; /* Unsigned large integer */ 43 typedef __uint16_t Elf32_Half; /* Unsigned medium integer */ 44 typedef __uint64_t Elf32_Lword; 45 46 typedef __uint64_t Elf64_Addr; 47 typedef __uint64_t Elf64_Off; 48 typedef __int32_t Elf64_Shalf; 49 50 typedef __int32_t Elf64_Sword; 51 typedef __uint32_t Elf64_Word; 52 53 typedef __int64_t Elf64_Sxword; 54 typedef __uint64_t Elf64_Xword; 55 typedef __uint64_t Elf64_Lword; 56 57 typedef __uint16_t Elf64_Half; 58 59 /* 60 * e_ident[] identification indexes 61 * See http://www.sco.com/developers/gabi/latest/ch4.eheader.html 62 */ 63 #define EI_MAG0 0 /* file ID */ 64 #define EI_MAG1 1 /* file ID */ 65 #define EI_MAG2 2 /* file ID */ 66 #define EI_MAG3 3 /* file ID */ 67 #define EI_CLASS 4 /* file class */ 68 #define EI_DATA 5 /* data encoding */ 69 #define EI_VERSION 6 /* ELF header version */ 70 #define EI_OSABI 7 /* OS/ABI ID */ 71 #define EI_ABIVERSION 8 /* ABI version */ 72 #define EI_PAD 9 /* start of pad bytes */ 73 #define EI_NIDENT 16 /* Size of e_ident[] */ 74 75 /* e_ident[] magic number */ 76 #define ELFMAG0 0x7f /* e_ident[EI_MAG0] */ 77 #define ELFMAG1 'E' /* e_ident[EI_MAG1] */ 78 #define ELFMAG2 'L' /* e_ident[EI_MAG2] */ 79 #define ELFMAG3 'F' /* e_ident[EI_MAG3] */ 80 #define ELFMAG "\177ELF" /* magic */ 81 #define SELFMAG 4 /* size of magic */ 82 83 /* e_ident[] file class */ 84 #define ELFCLASSNONE 0 /* invalid */ 85 #define ELFCLASS32 1 /* 32-bit objs */ 86 #define ELFCLASS64 2 /* 64-bit objs */ 87 #define ELFCLASSNUM 3 /* number of classes */ 88 89 /* e_ident[] data encoding */ 90 #define ELFDATANONE 0 /* invalid */ 91 #define ELFDATA2LSB 1 /* Little-Endian */ 92 #define ELFDATA2MSB 2 /* Big-Endian */ 93 #define ELFDATANUM 3 /* number of data encode defines */ 94 95 /* e_ident[] Operating System/ABI */ 96 #define ELFOSABI_SYSV 0 /* UNIX System V ABI */ 97 #define ELFOSABI_HPUX 1 /* HP-UX operating system */ 98 #define ELFOSABI_NETBSD 2 /* NetBSD */ 99 #define ELFOSABI_LINUX 3 /* GNU/Linux */ 100 #define ELFOSABI_HURD 4 /* GNU/Hurd */ 101 #define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */ 102 #define ELFOSABI_SOLARIS 6 /* Solaris */ 103 #define ELFOSABI_MONTEREY 7 /* Monterey */ 104 #define ELFOSABI_IRIX 8 /* IRIX */ 105 #define ELFOSABI_FREEBSD 9 /* FreeBSD */ 106 #define ELFOSABI_TRU64 10 /* TRU64 UNIX */ 107 #define ELFOSABI_MODESTO 11 /* Novell Modesto */ 108 #define ELFOSABI_OPENBSD 12 /* OpenBSD */ 109 #define ELFOSABI_ARM 97 /* ARM */ 110 #define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ 111 112 /* e_ident */ 113 #define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ 114 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ 115 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ 116 (ehdr).e_ident[EI_MAG3] == ELFMAG3) 117 118 /* ELF Header */ 119 typedef struct elfhdr { 120 unsigned char e_ident[EI_NIDENT]; /* ELF Identification */ 121 Elf32_Half e_type; /* object file type */ 122 Elf32_Half e_machine; /* machine */ 123 Elf32_Word e_version; /* object file version */ 124 Elf32_Addr e_entry; /* virtual entry point */ 125 Elf32_Off e_phoff; /* program header table offset */ 126 Elf32_Off e_shoff; /* section header table offset */ 127 Elf32_Word e_flags; /* processor-specific flags */ 128 Elf32_Half e_ehsize; /* ELF header size */ 129 Elf32_Half e_phentsize; /* program header entry size */ 130 Elf32_Half e_phnum; /* number of program header entries */ 131 Elf32_Half e_shentsize; /* section header entry size */ 132 Elf32_Half e_shnum; /* number of section header entries */ 133 Elf32_Half e_shstrndx; /* section header table's "section 134 header string table" entry offset */ 135 } Elf32_Ehdr; 136 137 typedef struct { 138 unsigned char e_ident[EI_NIDENT]; /* Id bytes */ 139 Elf64_Half e_type; /* file type */ 140 Elf64_Half e_machine; /* machine type */ 141 Elf64_Word e_version; /* version number */ 142 Elf64_Addr e_entry; /* entry point */ 143 Elf64_Off e_phoff; /* Program hdr offset */ 144 Elf64_Off e_shoff; /* Section hdr offset */ 145 Elf64_Word e_flags; /* Processor flags */ 146 Elf64_Half e_ehsize; /* sizeof ehdr */ 147 Elf64_Half e_phentsize; /* Program header entry size */ 148 Elf64_Half e_phnum; /* Number of program headers */ 149 Elf64_Half e_shentsize; /* Section header entry size */ 150 Elf64_Half e_shnum; /* Number of section headers */ 151 Elf64_Half e_shstrndx; /* String table index */ 152 } Elf64_Ehdr; 153 154 /* e_type */ 155 #define ET_NONE 0 /* No file type */ 156 #define ET_REL 1 /* relocatable file */ 157 #define ET_EXEC 2 /* executable file */ 158 #define ET_DYN 3 /* shared object file */ 159 #define ET_CORE 4 /* core file */ 160 #define ET_NUM 5 /* number of types */ 161 #define ET_LOPROC 0xff00 /* reserved range for processor */ 162 #define ET_HIPROC 0xffff /* specific e_type */ 163 164 /* e_machine */ 165 #define EM_NONE 0 /* No Machine */ 166 #define EM_M32 1 /* AT&T WE 32100 */ 167 #define EM_SPARC 2 /* SPARC */ 168 #define EM_386 3 /* Intel 80386 */ 169 #define EM_68K 4 /* Motorola 68000 */ 170 #define EM_88K 5 /* Motorola 88000 */ 171 #define EM_486 6 /* Intel 80486 - unused? */ 172 #define EM_860 7 /* Intel 80860 */ 173 #define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ 174 /* 175 * Don't know if EM_MIPS_RS4_BE, 176 * EM_SPARC64, EM_PARISC, 177 * or EM_PPC are ABI compliant 178 */ 179 #define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ 180 #define EM_SPARC64 11 /* SPARC v9 64-bit unofficial */ 181 #define EM_PARISC 15 /* HPPA */ 182 #define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ 183 #define EM_PPC 20 /* PowerPC */ 184 #define EM_PPC64 21 /* PowerPC 64 */ 185 #define EM_ARM 40 /* Advanced RISC Machines ARM */ 186 #define EM_ALPHA 41 /* DEC ALPHA */ 187 #define EM_SH 42 /* Hitachi/Renesas Super-H */ 188 #define EM_SPARCV9 43 /* SPARC version 9 */ 189 #define EM_IA_64 50 /* Intel IA-64 Processor */ 190 #define EM_AMD64 62 /* AMD64 architecture */ 191 #define EM_X86_64 EM_AMD64 192 #define EM_VAX 75 /* DEC VAX */ 193 #define EM_AARCH64 183 /* ARM 64-bit architecture (AArch64) */ 194 #define EM_RISCV 243 /* RISC-V */ 195 196 /* Non-standard */ 197 #define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */ 198 #define EM__LAST__ (EM_ALPHA_EXP + 1) 199 200 #define EM_NUM 22 /* number of machine types */ 201 202 /* Version */ 203 #define EV_NONE 0 /* Invalid */ 204 #define EV_CURRENT 1 /* Current */ 205 #define EV_NUM 2 /* number of versions */ 206 207 /* Magic for e_phnum: get real value from sh_info of first section header */ 208 #define PN_XNUM 0xffff 209 210 /* Section Header */ 211 typedef struct { 212 Elf32_Word sh_name; /* name - index into section header 213 string table section */ 214 Elf32_Word sh_type; /* type */ 215 Elf32_Word sh_flags; /* flags */ 216 Elf32_Addr sh_addr; /* address */ 217 Elf32_Off sh_offset; /* file offset */ 218 Elf32_Word sh_size; /* section size */ 219 Elf32_Word sh_link; /* section header table index link */ 220 Elf32_Word sh_info; /* extra information */ 221 Elf32_Word sh_addralign; /* address alignment */ 222 Elf32_Word sh_entsize; /* section entry size */ 223 } Elf32_Shdr; 224 225 typedef struct { 226 Elf64_Word sh_name; /* section name */ 227 Elf64_Word sh_type; /* section type */ 228 Elf64_Xword sh_flags; /* section flags */ 229 Elf64_Addr sh_addr; /* virtual address */ 230 Elf64_Off sh_offset; /* file offset */ 231 Elf64_Xword sh_size; /* section size */ 232 Elf64_Word sh_link; /* link to another */ 233 Elf64_Word sh_info; /* misc info */ 234 Elf64_Xword sh_addralign; /* memory alignment */ 235 Elf64_Xword sh_entsize; /* table entry size */ 236 } Elf64_Shdr; 237 238 /* Special Section Indexes */ 239 #define SHN_UNDEF 0 /* undefined */ 240 #define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */ 241 #define SHN_LOPROC 0xff00 /* reserved range for processor */ 242 #define SHN_HIPROC 0xff1f /* specific section indexes */ 243 #define SHN_ABS 0xfff1 /* absolute value */ 244 #define SHN_COMMON 0xfff2 /* common symbol */ 245 #define SHN_XINDEX 0xffff /* Escape -- index stored elsewhere. */ 246 #define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */ 247 248 /* sh_type */ 249 #define SHT_NULL 0 /* inactive */ 250 #define SHT_PROGBITS 1 /* program defined information */ 251 #define SHT_SYMTAB 2 /* symbol table section */ 252 #define SHT_STRTAB 3 /* string table section */ 253 #define SHT_RELA 4 /* relocation section with addends*/ 254 #define SHT_HASH 5 /* symbol hash table section */ 255 #define SHT_DYNAMIC 6 /* dynamic section */ 256 #define SHT_NOTE 7 /* note section */ 257 #define SHT_NOBITS 8 /* no space section */ 258 #define SHT_REL 9 /* relocation section without addends */ 259 #define SHT_SHLIB 10 /* reserved - purpose unknown */ 260 #define SHT_DYNSYM 11 /* dynamic symbol table section */ 261 #define SHT_NUM 12 /* number of section types */ 262 #define SHT_INIT_ARRAY 14 /* pointers to init functions */ 263 #define SHT_FINI_ARRAY 15 /* pointers to termination functions */ 264 #define SHT_PREINIT_ARRAY 16 /* ptrs to funcs called before init */ 265 #define SHT_GROUP 17 /* defines a section group */ 266 #define SHT_SYMTAB_SHNDX 18 /* Section indexes (see SHN_XINDEX). */ 267 #define SHT_RELR 19 /* relative-only relocation section */ 268 #define SHT_LOOS 0x60000000 /* reserved range for OS specific */ 269 #define SHT_SUNW_dof 0x6ffffff4 /* used by dtrace */ 270 #define SHT_GNU_LIBLIST 0x6ffffff7 /* libraries to be prelinked */ 271 #define SHT_SUNW_move 0x6ffffffa /* inf for partially init'ed symbols */ 272 #define SHT_SUNW_syminfo 0x6ffffffc /* ad symbol information */ 273 #define SHT_SUNW_verdef 0x6ffffffd /* symbol versioning inf */ 274 #define SHT_SUNW_verneed 0x6ffffffe /* symbol versioning req */ 275 #define SHT_SUNW_versym 0x6fffffff /* symbol versioning table */ 276 #define SHT_HIOS 0x6fffffff /* section header types */ 277 #define SHT_LOPROC 0x70000000 /* reserved range for processor */ 278 #define SHT_HIPROC 0x7fffffff /* specific section header types */ 279 #define SHT_LOUSER 0x80000000 /* reserved range for application */ 280 #define SHT_HIUSER 0xffffffff /* specific indexes */ 281 282 #define SHT_GNU_HASH 0x6ffffff6 /* GNU-style hash table section */ 283 284 /* Section names */ 285 #define ELF_BSS ".bss" /* uninitialized data */ 286 #define ELF_DATA ".data" /* initialized data */ 287 #define ELF_CTF ".SUNW_ctf" /* CTF data */ 288 #define ELF_DEBUG ".debug" /* debug */ 289 #define ELF_DYNAMIC ".dynamic" /* dynamic linking information */ 290 #define ELF_DYNSTR ".dynstr" /* dynamic string table */ 291 #define ELF_DYNSYM ".dynsym" /* dynamic symbol table */ 292 #define ELF_FINI ".fini" /* termination code */ 293 #define ELF_GOT ".got" /* global offset table */ 294 #define ELF_HASH ".hash" /* symbol hash table */ 295 #define ELF_INIT ".init" /* initialization code */ 296 #define ELF_REL_DATA ".rel.data" /* relocation data */ 297 #define ELF_REL_FINI ".rel.fini" /* relocation termination code */ 298 #define ELF_REL_INIT ".rel.init" /* relocation initialization code */ 299 #define ELF_REL_DYN ".rel.dyn" /* relocation dynamic link info */ 300 #define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */ 301 #define ELF_REL_TEXT ".rel.text" /* relocation code */ 302 #define ELF_RODATA ".rodata" /* read-only data */ 303 #define ELF_SHSTRTAB ".shstrtab" /* section header string table */ 304 #define ELF_STRTAB ".strtab" /* string table */ 305 #define ELF_SYMTAB ".symtab" /* symbol table */ 306 #define ELF_TEXT ".text" /* code */ 307 #define ELF_OPENBSDRANDOMDATA ".openbsd.randomdata" /* constant randomdata */ 308 #define ELF_OPENBSDMUTABLE ".openbsd.mutable" /* mutable bss */ 309 310 311 /* Section Attribute Flags - sh_flags */ 312 #define SHF_WRITE 0x1 /* Writable */ 313 #define SHF_ALLOC 0x2 /* occupies memory */ 314 #define SHF_EXECINSTR 0x4 /* executable */ 315 #define SHF_MERGE 0x10 /* may be merged */ 316 #define SHF_STRINGS 0x20 /* contains strings */ 317 #define SHF_INFO_LINK 0x40 /* sh_info holds section index */ 318 #define SHF_LINK_ORDER 0x80 /* ordering requirements */ 319 #define SHF_OS_NONCONFORMING 0x100 /* OS-specific processing required */ 320 #define SHF_GROUP 0x200 /* member of section group */ 321 #define SHF_TLS 0x400 /* thread local storage */ 322 #define SHF_COMPRESSED 0x800 /* contains compressed data */ 323 #define SHF_MASKOS 0x0ff00000 /* OS-specific semantics */ 324 #define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */ 325 /* specific section attributes */ 326 327 /* Symbol Table Entry */ 328 typedef struct elf32_sym { 329 Elf32_Word st_name; /* name - index into string table */ 330 Elf32_Addr st_value; /* symbol value */ 331 Elf32_Word st_size; /* symbol size */ 332 unsigned char st_info; /* type and binding */ 333 unsigned char st_other; /* 0 - no defined meaning */ 334 Elf32_Half st_shndx; /* section header index */ 335 } Elf32_Sym; 336 337 typedef struct { 338 Elf64_Word st_name; /* Symbol name index in str table */ 339 unsigned char st_info; /* type / binding attrs */ 340 unsigned char st_other; /* unused */ 341 Elf64_Half st_shndx; /* section index of symbol */ 342 Elf64_Addr st_value; /* value of symbol */ 343 Elf64_Xword st_size; /* size of symbol */ 344 } Elf64_Sym; 345 346 /* Symbol table index */ 347 #define STN_UNDEF 0 /* undefined */ 348 349 /* Extract symbol info - st_info */ 350 #define ELF32_ST_BIND(x) ((x) >> 4) 351 #define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf) 352 #define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) 353 354 #define ELF64_ST_BIND(x) ((x) >> 4) 355 #define ELF64_ST_TYPE(x) (((unsigned int) x) & 0xf) 356 #define ELF64_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) 357 358 /* Symbol Binding - ELF32_ST_BIND - st_info */ 359 #define STB_LOCAL 0 /* Local symbol */ 360 #define STB_GLOBAL 1 /* Global symbol */ 361 #define STB_WEAK 2 /* like global - lower precedence */ 362 #define STB_NUM 3 /* number of symbol bindings */ 363 #define STB_LOPROC 13 /* reserved range for processor */ 364 #define STB_HIPROC 15 /* specific symbol bindings */ 365 366 /* Symbol type - ELF32_ST_TYPE - st_info */ 367 #define STT_NOTYPE 0 /* not specified */ 368 #define STT_OBJECT 1 /* data object */ 369 #define STT_FUNC 2 /* function */ 370 #define STT_SECTION 3 /* section */ 371 #define STT_FILE 4 /* file */ 372 #define STT_TLS 6 /* thread local storage */ 373 #define STT_LOPROC 13 /* reserved range for processor */ 374 #define STT_HIPROC 15 /* specific symbol types */ 375 376 /* Extract symbol visibility - st_other */ 377 #define ELF_ST_VISIBILITY(v) ((v) & 0x3) 378 #define ELF32_ST_VISIBILITY ELF_ST_VISIBILITY 379 #define ELF64_ST_VISIBILITY ELF_ST_VISIBILITY 380 381 #define STV_DEFAULT 0 /* Visibility set by binding type */ 382 #define STV_INTERNAL 1 /* OS specific version of STV_HIDDEN */ 383 #define STV_HIDDEN 2 /* can only be seen inside own .so */ 384 #define STV_PROTECTED 3 /* HIDDEN inside, DEFAULT outside */ 385 386 /* Relocation entry with implicit addend */ 387 typedef struct { 388 Elf32_Addr r_offset; /* offset of relocation */ 389 Elf32_Word r_info; /* symbol table index and type */ 390 } Elf32_Rel; 391 392 /* Relocation entry with explicit addend */ 393 typedef struct { 394 Elf32_Addr r_offset; /* offset of relocation */ 395 Elf32_Word r_info; /* symbol table index and type */ 396 Elf32_Sword r_addend; 397 } Elf32_Rela; 398 399 /* Extract relocation info - r_info */ 400 #define ELF32_R_SYM(i) ((i) >> 8) 401 #define ELF32_R_TYPE(i) ((unsigned char) (i)) 402 #define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t)) 403 404 typedef struct { 405 Elf64_Addr r_offset; /* where to do it */ 406 Elf64_Xword r_info; /* index & type of relocation */ 407 } Elf64_Rel; 408 409 typedef struct { 410 Elf64_Addr r_offset; /* where to do it */ 411 Elf64_Xword r_info; /* index & type of relocation */ 412 Elf64_Sxword r_addend; /* adjustment value */ 413 } Elf64_Rela; 414 415 #define ELF64_R_SYM(info) ((info) >> 32) 416 #define ELF64_R_TYPE(info) ((info) & 0xFFFFFFFF) 417 #define ELF64_R_INFO(s,t) (((s) << 32) + (__uint32_t)(t)) 418 419 #if defined(__mips64__) && defined(__MIPSEL__) 420 /* 421 * The 64-bit MIPS ELF ABI uses a slightly different relocation format 422 * than the regular ELF ABI: the r_info field is split into several 423 * pieces (see gnu/usr.bin/binutils-2.17/include/elf/mips.h for details). 424 */ 425 #undef ELF64_R_SYM 426 #undef ELF64_R_TYPE 427 #undef ELF64_R_INFO 428 #define ELF64_R_TYPE(info) ((__uint64_t)swap32((info) >> 32)) 429 #define ELF64_R_SYM(info) ((info) & 0xFFFFFFFF) 430 #define ELF64_R_INFO(s,t) (((__uint64_t)swap32(t) << 32) + (__uint32_t)(s)) 431 #endif /* __mips64__ && __MIPSEL__ */ 432 433 /* 434 * Relative Relocation info. 435 * c.f. decode_relrs() in gnu/llvm/llvm/lib/Object/ELF.cpp 436 */ 437 typedef Elf32_Word Elf32_Relr; 438 typedef Elf64_Xword Elf64_Relr; 439 440 /* Program Header */ 441 typedef struct { 442 Elf32_Word p_type; /* segment type */ 443 Elf32_Off p_offset; /* segment offset */ 444 Elf32_Addr p_vaddr; /* virtual address of segment */ 445 Elf32_Addr p_paddr; /* physical address - ignored? */ 446 Elf32_Word p_filesz; /* number of bytes in file for seg. */ 447 Elf32_Word p_memsz; /* number of bytes in mem. for seg. */ 448 Elf32_Word p_flags; /* flags */ 449 Elf32_Word p_align; /* memory alignment */ 450 } Elf32_Phdr; 451 452 typedef struct { 453 Elf64_Word p_type; /* entry type */ 454 Elf64_Word p_flags; /* flags */ 455 Elf64_Off p_offset; /* offset */ 456 Elf64_Addr p_vaddr; /* virtual address */ 457 Elf64_Addr p_paddr; /* physical address */ 458 Elf64_Xword p_filesz; /* file size */ 459 Elf64_Xword p_memsz; /* memory size */ 460 Elf64_Xword p_align; /* memory & file alignment */ 461 } Elf64_Phdr; 462 463 /* Segment types - p_type */ 464 #define PT_NULL 0 /* unused */ 465 #define PT_LOAD 1 /* loadable segment */ 466 #define PT_DYNAMIC 2 /* dynamic linking section */ 467 #define PT_INTERP 3 /* the RTLD */ 468 #define PT_NOTE 4 /* auxiliary information */ 469 #define PT_SHLIB 5 /* reserved - purpose undefined */ 470 #define PT_PHDR 6 /* program header */ 471 #define PT_TLS 7 /* thread local storage */ 472 #define PT_LOOS 0x60000000 /* reserved range for OS */ 473 #define PT_HIOS 0x6fffffff /* specific segment types */ 474 #define PT_LOPROC 0x70000000 /* reserved range for processor */ 475 #define PT_HIPROC 0x7fffffff /* specific segment types */ 476 477 #define PT_GNU_EH_FRAME 0x6474e550 /* Exception handling info */ 478 #define PT_GNU_RELRO 0x6474e552 /* Read-only after relocation */ 479 480 #define PT_OPENBSD_MUTABLE 0x65a3dbe5 /* like bss, but not immutable */ 481 #define PT_OPENBSD_RANDOMIZE 0x65a3dbe6 /* fill with random data */ 482 #define PT_OPENBSD_WXNEEDED 0x65a3dbe7 /* program performs W^X violations */ 483 #define PT_OPENBSD_BOOTDATA 0x65a41be6 /* section for boot arguments */ 484 485 /* Segment flags - p_flags */ 486 #define PF_X 0x1 /* Executable */ 487 #define PF_W 0x2 /* Writable */ 488 #define PF_R 0x4 /* Readable */ 489 #define PF_MASKOS 0x0ff00000 /* reserved bits for OS */ 490 /* specific segment flags */ 491 #define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ 492 /* specific segment flags */ 493 494 #define PF_OPENBSD_MUTABLE 0x08000000 /* Mutable */ 495 496 /* Dynamic structure */ 497 typedef struct { 498 Elf32_Sword d_tag; /* controls meaning of d_val */ 499 union { 500 Elf32_Word d_val; /* Multiple meanings - see d_tag */ 501 Elf32_Addr d_ptr; /* program virtual address */ 502 } d_un; 503 } Elf32_Dyn; 504 505 typedef struct { 506 Elf64_Xword d_tag; /* controls meaning of d_val */ 507 union { 508 Elf64_Addr d_ptr; 509 Elf64_Xword d_val; 510 } d_un; 511 } Elf64_Dyn; 512 513 /* Dynamic Array Tags - d_tag */ 514 #define DT_NULL 0 /* marks end of _DYNAMIC array */ 515 #define DT_NEEDED 1 /* string table offset of needed lib */ 516 #define DT_PLTRELSZ 2 /* size of relocation entries in PLT */ 517 #define DT_PLTGOT 3 /* address PLT/GOT */ 518 #define DT_HASH 4 /* address of symbol hash table */ 519 #define DT_STRTAB 5 /* address of string table */ 520 #define DT_SYMTAB 6 /* address of symbol table */ 521 #define DT_RELA 7 /* address of relocation table */ 522 #define DT_RELASZ 8 /* size of relocation table */ 523 #define DT_RELAENT 9 /* size of relocation entry */ 524 #define DT_STRSZ 10 /* size of string table */ 525 #define DT_SYMENT 11 /* size of symbol table entry */ 526 #define DT_INIT 12 /* address of initialization func. */ 527 #define DT_FINI 13 /* address of termination function */ 528 #define DT_SONAME 14 /* string table offset of shared obj */ 529 #define DT_RPATH 15 /* string table offset of library 530 search path */ 531 #define DT_SYMBOLIC 16 /* start sym search in shared obj. */ 532 #define DT_REL 17 /* address of rel. tbl. w addends */ 533 #define DT_RELSZ 18 /* size of DT_REL relocation table */ 534 #define DT_RELENT 19 /* size of DT_REL relocation entry */ 535 #define DT_PLTREL 20 /* PLT referenced relocation entry */ 536 #define DT_DEBUG 21 /* bugger */ 537 #define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */ 538 #define DT_JMPREL 23 /* add. of PLT's relocation entries */ 539 #define DT_BIND_NOW 24 /* Bind now regardless of env setting */ 540 #define DT_INIT_ARRAY 25 /* address of array of init func */ 541 #define DT_FINI_ARRAY 26 /* address of array of term func */ 542 #define DT_INIT_ARRAYSZ 27 /* size of array of init func */ 543 #define DT_FINI_ARRAYSZ 28 /* size of array of term func */ 544 #define DT_RUNPATH 29 /* strtab offset of lib search path */ 545 #define DT_FLAGS 30 /* Set of DF_* flags */ 546 #define DT_ENCODING 31 /* further DT_* follow encoding rules */ 547 #define DT_PREINIT_ARRAY 32 /* address of array of preinit func */ 548 #define DT_PREINIT_ARRAYSZ 33 /* size of array of preinit func */ 549 #define DT_RELRSZ 35 /* size of DT_RELR relocation table */ 550 #define DT_RELR 36 /* addr of DT_RELR relocation table */ 551 #define DT_RELRENT 37 /* size of DT_RELR relocation entry */ 552 #define DT_LOOS 0x6000000d /* reserved range for OS */ 553 #define DT_HIOS 0x6ffff000 /* specific dynamic array tags */ 554 #define DT_LOPROC 0x70000000 /* reserved range for processor */ 555 #define DT_HIPROC 0x7fffffff /* specific dynamic array tags */ 556 557 /* some other useful tags */ 558 #define DT_GNU_HASH 0x6ffffef5 /* address of GNU hash table */ 559 #define DT_RELACOUNT 0x6ffffff9 /* if present, number of RELATIVE */ 560 #define DT_RELCOUNT 0x6ffffffa /* relocs, which must come first */ 561 #define DT_FLAGS_1 0x6ffffffb 562 563 /* Dynamic Flags - DT_FLAGS .dynamic entry */ 564 #define DF_ORIGIN 0x00000001 565 #define DF_SYMBOLIC 0x00000002 566 #define DF_TEXTREL 0x00000004 567 #define DF_BIND_NOW 0x00000008 568 #define DF_STATIC_TLS 0x00000010 569 570 /* Dynamic Flags - DT_FLAGS_1 .dynamic entry */ 571 #define DF_1_NOW 0x00000001 572 #define DF_1_GLOBAL 0x00000002 573 #define DF_1_GROUP 0x00000004 574 #define DF_1_NODELETE 0x00000008 575 #define DF_1_LOADFLTR 0x00000010 576 #define DF_1_INITFIRST 0x00000020 577 #define DF_1_NOOPEN 0x00000040 578 #define DF_1_ORIGIN 0x00000080 579 #define DF_1_DIRECT 0x00000100 580 #define DF_1_TRANS 0x00000200 581 #define DF_1_INTERPOSE 0x00000400 582 #define DF_1_NODEFLIB 0x00000800 583 #define DF_1_NODUMP 0x00001000 584 #define DF_1_CONLFAT 0x00002000 585 #define DF_1_ENDFILTEE 0x00004000 586 #define DF_1_DISPRELDNE 0x00008000 587 #define DF_1_DISPRELPND 0x00010000 588 #define DF_1_NODIRECT 0x00020000 589 #define DF_1_IGNMULDEF 0x00040000 590 #define DF_1_NOKSYMS 0x00080000 591 #define DF_1_NOHDR 0x00100000 592 #define DF_1_EDITED 0x00200000 593 #define DF_1_NORELOC 0x00400000 594 #define DF_1_SYMINTPOSE 0x00800000 595 #define DF_1_GLOBAUDIT 0x01000000 596 #define DF_1_SINGLETON 0x02000000 597 #define DF_1_PIE 0x08000000 598 599 /* 600 * Note header 601 */ 602 typedef struct { 603 Elf32_Word n_namesz; 604 Elf32_Word n_descsz; 605 Elf32_Word n_type; 606 } Elf32_Nhdr; 607 608 typedef struct { 609 Elf64_Word n_namesz; 610 Elf64_Word n_descsz; 611 Elf64_Word n_type; 612 } Elf64_Nhdr; 613 614 /* 615 * Note Definitions 616 */ 617 typedef struct { 618 Elf32_Word namesz; 619 Elf32_Word descsz; 620 Elf32_Word type; 621 } Elf32_Note; 622 623 typedef struct { 624 Elf64_Word namesz; 625 Elf64_Word descsz; 626 Elf64_Word type; 627 } Elf64_Note; 628 629 /* Values for n_type. */ 630 #define NT_PRSTATUS 1 /* Process status. */ 631 #define NT_FPREGSET 2 /* Floating point registers. */ 632 #define NT_PRPSINFO 3 /* Process state info. */ 633 634 /* 635 * OpenBSD-specific core file information. 636 * 637 * OpenBSD ELF core files use notes to provide information about 638 * the process's state. The note name is "OpenBSD" for information 639 * that is global to the process, and "OpenBSD@nn", where "nn" is the 640 * thread ID of the thread that the information belongs to (such as 641 * register state). 642 * 643 * We use the following note identifiers: 644 * 645 * NT_OPENBSD_PROCINFO 646 * Note is a "elfcore_procinfo" structure. 647 * NT_OPENBSD_AUXV 648 * Note is a a bunch of Auxiliary Vectors, terminated by 649 * an AT_NULL entry. 650 * NT_OPENBSD_REGS 651 * Note is a "reg" structure. 652 * NT_OPENBSD_FPREGS 653 * Note is a "fpreg" structure. 654 * 655 * Please try to keep the members of the "elfcore_procinfo" structure 656 * nicely aligned, and if you add elements, add them to the end and 657 * bump the version. 658 */ 659 660 #define NT_OPENBSD_PROCINFO 10 661 #define NT_OPENBSD_AUXV 11 662 663 #define NT_OPENBSD_REGS 20 664 #define NT_OPENBSD_FPREGS 21 665 #define NT_OPENBSD_XFPREGS 22 666 #define NT_OPENBSD_WCOOKIE 23 667 668 struct elfcore_procinfo { 669 /* Version 1 fields start here. */ 670 uint32_t cpi_version; /* netbsd_elfcore_procinfo version */ 671 #define ELFCORE_PROCINFO_VERSION 1 672 uint32_t cpi_cpisize; /* sizeof(netbsd_elfcore_procinfo) */ 673 uint32_t cpi_signo; /* killing signal */ 674 uint32_t cpi_sigcode; /* signal code */ 675 uint32_t cpi_sigpend; /* pending signals */ 676 uint32_t cpi_sigmask; /* blocked signals */ 677 uint32_t cpi_sigignore; /* ignored signals */ 678 uint32_t cpi_sigcatch; /* signals being caught by user */ 679 int32_t cpi_pid; /* process ID */ 680 int32_t cpi_ppid; /* parent process ID */ 681 int32_t cpi_pgrp; /* process group ID */ 682 int32_t cpi_sid; /* session ID */ 683 uint32_t cpi_ruid; /* real user ID */ 684 uint32_t cpi_euid; /* effective user ID */ 685 uint32_t cpi_svuid; /* saved user ID */ 686 uint32_t cpi_rgid; /* real group ID */ 687 uint32_t cpi_egid; /* effective group ID */ 688 uint32_t cpi_svgid; /* saved group ID */ 689 int8_t cpi_name[32]; /* copy of pr->ps_comm */ 690 }; 691 692 /* 693 * XXX - these _KERNEL items aren't part of the ABI! 694 */ 695 #if defined(_KERNEL) || defined(_DYN_LOADER) 696 697 #define ELF32_NO_ADDR ((uint32_t) ~0) /* Indicates addr. not yet filled in */ 698 699 typedef struct { 700 Elf32_Sword au_id; /* 32-bit id */ 701 Elf32_Word au_v; /* 32-bit value */ 702 } Aux32Info; 703 704 #define ELF64_NO_ADDR ((__uint64_t) ~0)/* Indicates addr. not yet filled in */ 705 706 typedef struct { 707 Elf64_Shalf au_id; /* 32-bit id */ 708 Elf64_Xword au_v; /* 64-bit value */ 709 } Aux64Info; 710 711 enum AuxID { 712 AUX_null = 0, 713 AUX_ignore = 1, 714 AUX_execfd = 2, 715 AUX_phdr = 3, /* &phdr[0] */ 716 AUX_phent = 4, /* sizeof(phdr[0]) */ 717 AUX_phnum = 5, /* # phdr entries */ 718 AUX_pagesz = 6, /* PAGESIZE */ 719 AUX_base = 7, /* base addr for ld.so or static PIE */ 720 AUX_flags = 8, /* processor flags */ 721 AUX_entry = 9, /* a.out entry */ 722 AUX_sun_uid = 2000, /* euid */ 723 AUX_sun_ruid = 2001, /* ruid */ 724 AUX_sun_gid = 2002, /* egid */ 725 AUX_sun_rgid = 2003, /* rgid */ 726 AUX_openbsd_timekeep = 4000, /* userland clock_gettime */ 727 }; 728 729 struct elf_args { 730 u_long arg_entry; /* program entry point */ 731 u_long arg_interp; /* Interpreter load address */ 732 u_long arg_phaddr; /* program header address */ 733 u_long arg_phentsize; /* Size of program header */ 734 u_long arg_phnum; /* Number of program headers */ 735 }; 736 737 #endif 738 739 #if !defined(ELFSIZE) && defined(ARCH_ELFSIZE) 740 #define ELFSIZE ARCH_ELFSIZE 741 #endif 742 743 #if defined(ELFSIZE) 744 #define CONCAT(x,y) __CONCAT(x,y) 745 #define ELFNAME(x) CONCAT(elf,CONCAT(ELFSIZE,CONCAT(_,x))) 746 #define ELFDEFNNAME(x) CONCAT(ELF,CONCAT(ELFSIZE,CONCAT(_,x))) 747 #endif 748 749 #if defined(ELFSIZE) && (ELFSIZE == 32) 750 #define Elf_Ehdr Elf32_Ehdr 751 #define Elf_Phdr Elf32_Phdr 752 #define Elf_Shdr Elf32_Shdr 753 #define Elf_Sym Elf32_Sym 754 #define Elf_Rel Elf32_Rel 755 #define Elf_RelA Elf32_Rela 756 #define Elf_Relr Elf32_Relr 757 #define Elf_Dyn Elf32_Dyn 758 #define Elf_Half Elf32_Half 759 #define Elf_Word Elf32_Word 760 #define Elf_Sword Elf32_Sword 761 #define Elf_Addr Elf32_Addr 762 #define Elf_Off Elf32_Off 763 #define Elf_Nhdr Elf32_Nhdr 764 #define Elf_Note Elf32_Note 765 766 #define ELF_R_SYM ELF32_R_SYM 767 #define ELF_R_TYPE ELF32_R_TYPE 768 #define ELF_R_INFO ELF32_R_INFO 769 #define ELFCLASS ELFCLASS32 770 771 #define ELF_ST_BIND ELF32_ST_BIND 772 #define ELF_ST_TYPE ELF32_ST_TYPE 773 #define ELF_ST_INFO ELF32_ST_INFO 774 775 #define ELF_NO_ADDR ELF32_NO_ADDR 776 #define AuxInfo Aux32Info 777 #elif defined(ELFSIZE) && (ELFSIZE == 64) 778 #define Elf_Ehdr Elf64_Ehdr 779 #define Elf_Phdr Elf64_Phdr 780 #define Elf_Shdr Elf64_Shdr 781 #define Elf_Sym Elf64_Sym 782 #define Elf_Rel Elf64_Rel 783 #define Elf_RelA Elf64_Rela 784 #define Elf_Relr Elf64_Relr 785 #define Elf_Dyn Elf64_Dyn 786 #define Elf_Half Elf64_Half 787 #define Elf_Word Elf64_Word 788 #define Elf_Sword Elf64_Sword 789 #define Elf_Addr Elf64_Addr 790 #define Elf_Off Elf64_Off 791 #define Elf_Nhdr Elf64_Nhdr 792 #define Elf_Note Elf64_Note 793 794 #define ELF_R_SYM ELF64_R_SYM 795 #define ELF_R_TYPE ELF64_R_TYPE 796 #define ELF_R_INFO ELF64_R_INFO 797 #define ELFCLASS ELFCLASS64 798 799 #define ELF_ST_BIND ELF64_ST_BIND 800 #define ELF_ST_TYPE ELF64_ST_TYPE 801 #define ELF_ST_INFO ELF64_ST_INFO 802 803 #define ELF_NO_ADDR ELF64_NO_ADDR 804 #define AuxInfo Aux64Info 805 #endif 806 807 #ifndef _KERNEL 808 extern Elf_Dyn _DYNAMIC[]; 809 #endif 810 811 #ifdef _KERNEL 812 /* 813 * How many entries are in the AuxInfo array we pass to the process? 814 */ 815 #define ELF_AUX_ENTRIES 9 816 #define ELF_AUX_WORDS (sizeof(AuxInfo) * ELF_AUX_ENTRIES / sizeof(char *)) 817 818 struct exec_package; 819 820 int exec_elf_makecmds(struct proc *, struct exec_package *); 821 int exec_elf_fixup(struct proc *, struct exec_package *); 822 int coredump_elf(struct proc *, void *); 823 #endif /* _KERNEL */ 824 825 #define ELF_TARG_VER 1 /* The ver for which this code is intended */ 826 827 #endif /* _SYS_EXEC_ELF_H_ */
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