elfdump.c revision 109329
1189251Ssam/*- 2189251Ssam * Copyright (c) 2001 Jake Burkholder 3189251Ssam * All rights reserved. 4189251Ssam * 5252726Srpaulo * Redistribution and use in source and binary forms, with or without 6252726Srpaulo * modification, are permitted provided that the following conditions 7189251Ssam * are met: 8189251Ssam * 1. Redistributions of source code must retain the above copyright 9189251Ssam * notice, this list of conditions and the following disclaimer. 10189251Ssam * 2. Redistributions in binary form must reproduce the above copyright 11189251Ssam * notice, this list of conditions and the following disclaimer in the 12189251Ssam * documentation and/or other materials provided with the distribution. 13189251Ssam * 14189251Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15189251Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16189251Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17189251Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18189251Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19189251Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20189251Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21189251Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22189251Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23189251Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24189251Ssam * SUCH DAMAGE. 25189251Ssam */ 26189251Ssam 27189251Ssam#include <sys/cdefs.h> 28189251Ssam__FBSDID("$FreeBSD: head/usr.bin/elfdump/elfdump.c 109329 2003-01-15 20:48:56Z obrien $"); 29189251Ssam 30189251Ssam#include <sys/types.h> 31189251Ssam#include <sys/elf32.h> 32189251Ssam#include <sys/elf64.h> 33189251Ssam#include <sys/mman.h> 34189251Ssam#include <sys/stat.h> 35189251Ssam#include <err.h> 36189251Ssam#include <fcntl.h> 37189251Ssam#include <stddef.h> 38189251Ssam#include <stdio.h> 39189251Ssam#include <stdlib.h> 40189251Ssam#include <string.h> 41189251Ssam#include <unistd.h> 42189251Ssam 43189251Ssam#define ED_DYN (1<<0) 44189251Ssam#define ED_EHDR (1<<1) 45189251Ssam#define ED_GOT (1<<2) 46189251Ssam#define ED_HASH (1<<3) 47189251Ssam#define ED_INTERP (1<<4) 48189251Ssam#define ED_NOTE (1<<5) 49189251Ssam#define ED_PHDR (1<<6) 50189251Ssam#define ED_REL (1<<7) 51189251Ssam#define ED_SHDR (1<<8) 52189251Ssam#define ED_SYMTAB (1<<9) 53189251Ssam#define ED_ALL ((1<<10)-1) 54189251Ssam 55189251Ssam#define elf_get_addr elf_get_quad 56189251Ssam#define elf_get_off elf_get_quad 57189251Ssam#define elf_get_size elf_get_quad 58189251Ssam 59189251Ssamenum elf_member { 60189251Ssam D_TAG = 1, D_PTR, D_VAL, 61189251Ssam 62189251Ssam E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY, 63189251Ssam E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE, 64189251Ssam E_SHNUM, E_SHSTRNDX, 65189251Ssam 66189251Ssam N_NAMESZ, N_DESCSZ, N_TYPE, 67189251Ssam 68189251Ssam P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS, 69189251Ssam P_ALIGN, 70189251Ssam 71189251Ssam SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK, 72189251Ssam SH_INFO, SH_ADDRALIGN, SH_ENTSIZE, 73189251Ssam 74189251Ssam ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX, 75189251Ssam 76189251Ssam R_OFFSET, R_INFO, 77189251Ssam 78189251Ssam RA_OFFSET, RA_INFO, RA_ADDEND 79189251Ssam}; 80189251Ssam 81189251Ssamtypedef enum elf_member elf_member_t; 82189251Ssam 83189251Ssamint elf32_offsets[] = { 84189251Ssam 0, 85189251Ssam 86189251Ssam offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr), 87189251Ssam offsetof(Elf32_Dyn, d_un.d_val), 88189251Ssam 89189251Ssam offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), 90189251Ssam offsetof(Elf32_Ehdr, e_ident[EI_DATA]), 91189251Ssam offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), 92 offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine), 93 offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry), 94 offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff), 95 offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize), 96 offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum), 97 offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum), 98 offsetof(Elf32_Ehdr, e_shstrndx), 99 100 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), 101 offsetof(Elf_Note, n_type), 102 103 offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset), 104 offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr), 105 offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz), 106 offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align), 107 108 offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type), 109 offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr), 110 offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size), 111 offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info), 112 offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize), 113 114 offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value), 115 offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info), 116 offsetof(Elf32_Sym, st_shndx), 117 118 offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info), 119 120 offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info), 121 offsetof(Elf32_Rela, r_addend) 122}; 123 124int elf64_offsets[] = { 125 0, 126 127 offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr), 128 offsetof(Elf64_Dyn, d_un.d_val), 129 130 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), 131 offsetof(Elf32_Ehdr, e_ident[EI_DATA]), 132 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), 133 offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine), 134 offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry), 135 offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff), 136 offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize), 137 offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum), 138 offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum), 139 offsetof(Elf64_Ehdr, e_shstrndx), 140 141 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), 142 offsetof(Elf_Note, n_type), 143 144 offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset), 145 offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr), 146 offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz), 147 offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align), 148 149 offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type), 150 offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr), 151 offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size), 152 offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info), 153 offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize), 154 155 offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value), 156 offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info), 157 offsetof(Elf64_Sym, st_shndx), 158 159 offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info), 160 161 offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info), 162 offsetof(Elf64_Rela, r_addend) 163}; 164 165char *d_tags[] = { 166 "DT_NULL", "DT_NEEDED", "DT_PLTRELSZ", "DT_PLTGOT", "DT_HASH", 167 "DT_STRTAB", "DT_SYMTAB", "DT_RELA", "DT_RELASZ", "DT_RELAENT", 168 "DT_STRSZ", "DT_SYMENT", "DT_INIT", "DT_FINI", "DT_SONAME", 169 "DT_RPATH", "DT_SYMBOLIC", "DT_REL", "DT_RELSZ", "DT_RELENT", 170 "DT_PLTREL", "DT_DEBUG", "DT_TEXTREL", "DT_JMPREL" 171}; 172 173char *e_machines[] = { 174 "EM_NONE", "EM_M32", "EM_SPARC", "EM_386", "EM_68K", "EM_88K", 175 "EM_486", "EM_860", "EM_MIPS" 176}; 177 178char *e_types[] = { 179 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE" 180}; 181 182char *ei_versions[] = { 183 "EV_NONE", "EV_CURRENT" 184}; 185 186char *ei_classes[] = { 187 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64" 188}; 189 190char *ei_data[] = { 191 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB" 192}; 193 194char *ei_abis[] = { 195 "ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX", 196 "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", 197 "ELFOSABI_MONTEREY", "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", 198 "ELFOSABI_TRU64", "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD" 199}; 200 201char *p_types[] = { 202 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE", 203 "PT_SHLIB", "PT_PHDR" 204}; 205 206char *p_flags[] = { 207 "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R", 208 "PF_X|PF_W|PF_R" 209}; 210 211/* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */ 212const char 213*sh_types(u_int64_t sht) { 214 switch (sht) { 215 case 0: return "SHT_NULL"; 216 case 1: return "SHT_PROGBITS"; 217 case 2: return "SHT_SYMTAB"; 218 case 3: return "SHT_STRTAB"; 219 case 4: return "SHT_RELA"; 220 case 5: return "SHT_HASH"; 221 case 6: return "SHT_DYNAMIC"; 222 case 7: return "SHT_NOTE"; 223 case 8: return "SHT_NOBITS"; 224 case 9: return "SHT_REL"; 225 case 10: return "SHT_SHLIB"; 226 case 11: return "SHT_DYNSYM"; 227 case 14: return "SHT_INIT_ARRAY"; 228 case 15: return "SHT_FINI_ARRAY"; 229 case 16: return "SHT_PREINIT_ARRAY"; 230 case 17: return "SHT_GROUP"; 231 case 18: return "SHT_SYMTAB_SHNDX"; 232 case 0x6ffffff0: return "XXX:VERSYM"; 233 case 0x6ffffff7: return "SHT_GNU_LIBLIST"; 234 case 0x6ffffffc: return "XXX:VERDEF"; 235 case 0x6ffffffd: return "SHT_SUNW(GNU)_verdef"; 236 case 0x6ffffffe: return "SHT_SUNW(GNU)_verneed"; 237 case 0x6fffffff: return "SHT_SUNW(GNU)_versym"; 238 case 0x7ffffffd: return "XXX:AUXILIARY"; 239 case 0x7fffffff: return "XXX:FILTER"; 240 default: return "ERROR: SHT NOT DEFINED"; 241 } 242}; 243 244char *sh_flags[] = { 245 "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR", 246 "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR", 247 "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR" 248}; 249 250char *st_types[] = { 251 "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE" 252}; 253 254char *st_bindings[] = { 255 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK" 256}; 257 258char *dynstr; 259char *shstrtab; 260char *strtab; 261FILE *out; 262 263u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member); 264u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member); 265u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member); 266u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member); 267u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member); 268 269void elf_print_ehdr(void *e); 270void elf_print_phdr(void *e, void *p); 271void elf_print_shdr(void *e, void *sh); 272void elf_print_symtab(void *e, void *sh, char *str); 273void elf_print_dynamic(void *e, void *sh); 274void elf_print_rel(void *e, void *r); 275void elf_print_rela(void *e, void *ra); 276void elf_print_interp(void *e, void *p); 277void elf_print_got(void *e, void *sh); 278void elf_print_hash(void *e, void *sh); 279void elf_print_note(void *e, void *sh); 280 281void usage(void); 282 283int 284main(int ac, char **av) 285{ 286 u_int64_t phoff; 287 u_int64_t shoff; 288 u_int64_t phentsize; 289 u_int64_t phnum; 290 u_int64_t shentsize; 291 u_int64_t shnum; 292 u_int64_t shstrndx; 293 u_int64_t offset; 294 u_int64_t name; 295 u_int64_t type; 296 struct stat sb; 297 u_int flags; 298 void *e; 299 void *p; 300 void *sh; 301 void *v; 302 int fd; 303 int ch; 304 int i; 305 306 out = stdout; 307 flags = 0; 308 while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1) 309 switch (ch) { 310 case 'a': 311 flags = ED_ALL; 312 break; 313 case 'c': 314 flags |= ED_SHDR; 315 break; 316 case 'd': 317 flags |= ED_DYN; 318 break; 319 case 'e': 320 flags |= ED_EHDR; 321 break; 322 case 'i': 323 flags |= ED_INTERP; 324 break; 325 case 'G': 326 flags |= ED_GOT; 327 break; 328 case 'h': 329 flags |= ED_HASH; 330 break; 331 case 'n': 332 flags |= ED_NOTE; 333 break; 334 case 'p': 335 flags |= ED_PHDR; 336 break; 337 case 'r': 338 flags |= ED_REL; 339 break; 340 case 's': 341 flags |= ED_SYMTAB; 342 break; 343 case 'w': 344 if ((out = fopen(optarg, "w")) == NULL) 345 err(1, "%s", optarg); 346 break; 347 case '?': 348 default: 349 usage(); 350 } 351 ac -= optind; 352 av += optind; 353 if (ac == 0 || flags == 0) 354 usage(); 355 if ((fd = open(*av, O_RDONLY)) < 0 || 356 fstat(fd, &sb) < 0) 357 err(1, NULL); 358 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); 359 if (e == MAP_FAILED) 360 err(1, NULL); 361 if (!IS_ELF(*(Elf32_Ehdr *)e)) 362 errx(1, "not an elf file"); 363 phoff = elf_get_off(e, e, E_PHOFF); 364 shoff = elf_get_off(e, e, E_SHOFF); 365 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 366 phnum = elf_get_quarter(e, e, E_PHNUM); 367 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 368 shnum = elf_get_quarter(e, e, E_SHNUM); 369 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 370 p = e + phoff; 371 sh = e + shoff; 372 offset = elf_get_off(e, sh + shstrndx * shentsize, SH_OFFSET); 373 shstrtab = e + offset; 374 for (i = 0; i < shnum; i++) { 375 name = elf_get_word(e, sh + i * shentsize, SH_NAME); 376 offset = elf_get_off(e, sh + i * shentsize, SH_OFFSET); 377 if (strcmp(shstrtab + name, ".strtab") == 0) 378 strtab = e + offset; 379 if (strcmp(shstrtab + name, ".dynstr") == 0) 380 dynstr = e + offset; 381 } 382 if (flags & ED_EHDR) 383 elf_print_ehdr(e); 384 if (flags & ED_PHDR) 385 elf_print_phdr(e, p); 386 if (flags & ED_SHDR) 387 elf_print_shdr(e, sh); 388 for (i = 0; i < phnum; i++) { 389 v = p + i * phentsize; 390 type = elf_get_word(e, v, P_TYPE); 391 switch (type) { 392 case PT_INTERP: 393 if (flags & ED_INTERP) 394 elf_print_interp(e, v); 395 break; 396 case PT_NULL: 397 case PT_LOAD: 398 case PT_DYNAMIC: 399 case PT_NOTE: 400 case PT_SHLIB: 401 case PT_PHDR: 402 break; 403 } 404 } 405 for (i = 0; i < shnum; i++) { 406 v = sh + i * shentsize; 407 type = elf_get_word(e, v, SH_TYPE); 408 switch (type) { 409 case SHT_SYMTAB: 410 if (flags & ED_SYMTAB) 411 elf_print_symtab(e, v, strtab); 412 break; 413 case SHT_DYNAMIC: 414 if (flags & ED_DYN) 415 elf_print_dynamic(e, v); 416 break; 417 case SHT_RELA: 418 if (flags & ED_REL) 419 elf_print_rela(e, v); 420 break; 421 case SHT_REL: 422 if (flags & ED_REL) 423 elf_print_rel(e, v); 424 break; 425 case SHT_NOTE: 426 name = elf_get_word(e, v, SH_NAME); 427 if (flags & ED_NOTE && 428 strcmp(shstrtab + name, ".note.ABI-tag") == 0) 429 elf_print_note(e, v); 430 break; 431 case SHT_DYNSYM: 432 if (flags & ED_SYMTAB) 433 elf_print_symtab(e, v, dynstr); 434 break; 435 case SHT_PROGBITS: 436 name = elf_get_word(e, v, SH_NAME); 437 if (flags & ED_GOT && 438 strcmp(shstrtab + name, ".got") == 0) 439 elf_print_got(e, v); 440 break; 441 case SHT_HASH: 442 if (flags & ED_HASH) 443 elf_print_hash(e, v); 444 break; 445 case SHT_NULL: 446 case SHT_STRTAB: 447 case SHT_NOBITS: 448 case SHT_SHLIB: 449 break; 450 } 451 } 452 453 return 0; 454} 455 456void 457elf_print_ehdr(void *e) 458{ 459 u_int64_t class; 460 u_int64_t data; 461 u_int64_t osabi; 462 u_int64_t type; 463 u_int64_t machine; 464 u_int64_t version; 465 u_int64_t entry; 466 u_int64_t phoff; 467 u_int64_t shoff; 468 u_int64_t flags; 469 u_int64_t ehsize; 470 u_int64_t phentsize; 471 u_int64_t phnum; 472 u_int64_t shentsize; 473 u_int64_t shnum; 474 u_int64_t shstrndx; 475 476 class = elf_get_byte(e, e, E_CLASS); 477 data = elf_get_byte(e, e, E_DATA); 478 osabi = elf_get_byte(e, e, E_OSABI); 479 type = elf_get_quarter(e, e, E_TYPE); 480 machine = elf_get_quarter(e, e, E_MACHINE); 481 version = elf_get_word(e, e, E_VERSION); 482 entry = elf_get_addr(e, e, E_ENTRY); 483 phoff = elf_get_off(e, e, E_PHOFF); 484 shoff = elf_get_off(e, e, E_SHOFF); 485 flags = elf_get_word(e, e, E_FLAGS); 486 ehsize = elf_get_quarter(e, e, E_EHSIZE); 487 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 488 phnum = elf_get_quarter(e, e, E_PHNUM); 489 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 490 shnum = elf_get_quarter(e, e, E_SHNUM); 491 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 492 fprintf(out, "\nelf header:\n"); 493 fprintf(out, "\n"); 494 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data], 495 ei_abis[osabi]); 496 fprintf(out, "\te_type: %s\n", e_types[type]); 497 if (machine < sizeof e_machines / sizeof *e_machines) 498 fprintf(out, "\te_machine: %s\n", e_machines[machine]); 499 else 500 fprintf(out, "\te_machine: %lld\n", machine); 501 fprintf(out, "\te_version: %s\n", ei_versions[version]); 502 fprintf(out, "\te_entry: %#llx\n", entry); 503 fprintf(out, "\te_phoff: %lld\n", phoff); 504 fprintf(out, "\te_shoff: %lld\n", shoff); 505 fprintf(out, "\te_flags: %lld\n", flags); 506 fprintf(out, "\te_ehsize: %lld\n", ehsize); 507 fprintf(out, "\te_phentsize: %lld\n", phentsize); 508 fprintf(out, "\te_phnum: %lld\n", phnum); 509 fprintf(out, "\te_shentsize: %lld\n", shentsize); 510 fprintf(out, "\te_shnum: %lld\n", shnum); 511 fprintf(out, "\te_shstrndx: %lld\n", shstrndx); 512} 513 514void 515elf_print_phdr(void *e, void *p) 516{ 517 u_int64_t phentsize; 518 u_int64_t phnum; 519 u_int64_t type; 520 u_int64_t offset; 521 u_int64_t vaddr; 522 u_int64_t paddr; 523 u_int64_t filesz; 524 u_int64_t memsz; 525 u_int64_t flags; 526 u_int64_t align; 527 void *v; 528 int i; 529 530 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 531 phnum = elf_get_quarter(e, e, E_PHNUM); 532 fprintf(out, "\nprogram header:\n"); 533 for (i = 0; i < phnum; i++) { 534 v = p + i * phentsize; 535 type = elf_get_word(e, v, P_TYPE); 536 offset = elf_get_off(e, v, P_OFFSET); 537 vaddr = elf_get_addr(e, v, P_VADDR); 538 paddr = elf_get_addr(e, v, P_PADDR); 539 filesz = elf_get_size(e, v, P_FILESZ); 540 memsz = elf_get_size(e, v, P_MEMSZ); 541 flags = elf_get_word(e, v, P_FLAGS); 542 align = elf_get_size(e, v, P_ALIGN); 543 fprintf(out, "\n"); 544 fprintf(out, "entry: %d\n", i); 545 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]); 546 fprintf(out, "\tp_offset: %lld\n", offset); 547 fprintf(out, "\tp_vaddr: %#llx\n", vaddr); 548 fprintf(out, "\tp_paddr: %#llx\n", paddr); 549 fprintf(out, "\tp_filesz: %lld\n", filesz); 550 fprintf(out, "\tp_memsz: %lld\n", memsz); 551 fprintf(out, "\tp_flags: %s\n", p_flags[flags]); 552 fprintf(out, "\tp_align: %lld\n", align); 553 } 554} 555 556void 557elf_print_shdr(void *e, void *sh) 558{ 559 u_int64_t shentsize; 560 u_int64_t shnum; 561 u_int64_t name; 562 u_int64_t type; 563 u_int64_t flags; 564 u_int64_t addr; 565 u_int64_t offset; 566 u_int64_t size; 567 u_int64_t link; 568 u_int64_t info; 569 u_int64_t addralign; 570 u_int64_t entsize; 571 void *v; 572 int i; 573 574 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 575 shnum = elf_get_quarter(e, e, E_SHNUM); 576 fprintf(out, "\nsection header:\n"); 577 for (i = 0; i < shnum; i++) { 578 v = sh + i * shentsize; 579 name = elf_get_word(e, v, SH_NAME); 580 type = elf_get_word(e, v, SH_TYPE); 581 flags = elf_get_word(e, v, SH_FLAGS); 582 addr = elf_get_addr(e, v, SH_ADDR); 583 offset = elf_get_off(e, v, SH_OFFSET); 584 size = elf_get_size(e, v, SH_SIZE); 585 link = elf_get_word(e, v, SH_LINK); 586 info = elf_get_word(e, v, SH_INFO); 587 addralign = elf_get_size(e, v, SH_ADDRALIGN); 588 entsize = elf_get_size(e, v, SH_ENTSIZE); 589 fprintf(out, "\n"); 590 fprintf(out, "entry: %d\n", i); 591 fprintf(out, "\tsh_name: %s\n", shstrtab + name); 592 fprintf(out, "\tsh_type: %s\n", sh_types(type)); 593 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]); 594 fprintf(out, "\tsh_addr: %#llx\n", addr); 595 fprintf(out, "\tsh_offset: %lld\n", offset); 596 fprintf(out, "\tsh_size: %lld\n", size); 597 fprintf(out, "\tsh_link: %lld\n", link); 598 fprintf(out, "\tsh_info: %lld\n", info); 599 fprintf(out, "\tsh_addralign: %lld\n", addralign); 600 fprintf(out, "\tsh_entsize: %lld\n", entsize); 601 } 602} 603 604void 605elf_print_symtab(void *e, void *sh, char *str) 606{ 607 u_int64_t offset; 608 u_int64_t entsize; 609 u_int64_t size; 610 u_int64_t name; 611 u_int64_t value; 612 u_int64_t info; 613 u_int64_t shndx; 614 void *st; 615 int len; 616 int i; 617 618 offset = elf_get_off(e, sh, SH_OFFSET); 619 entsize = elf_get_size(e, sh, SH_ENTSIZE); 620 size = elf_get_size(e, sh, SH_SIZE); 621 name = elf_get_word(e, sh, SH_NAME); 622 len = size / entsize; 623 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name); 624 for (i = 0; i < len; i++) { 625 st = e + offset + i * entsize; 626 name = elf_get_word(e, st, ST_NAME); 627 value = elf_get_addr(e, st, ST_VALUE); 628 size = elf_get_size(e, st, ST_SIZE); 629 info = elf_get_byte(e, st, ST_INFO); 630 shndx = elf_get_quarter(e, st, ST_SHNDX); 631 fprintf(out, "\n"); 632 fprintf(out, "entry: %d\n", i); 633 fprintf(out, "\tst_name: %s\n", str + name); 634 fprintf(out, "\tst_value: %#llx\n", value); 635 fprintf(out, "\tst_size: %lld\n", size); 636 fprintf(out, "\tst_info: %s %s\n", 637 st_types[ELF32_ST_TYPE(info)], 638 st_bindings[ELF32_ST_BIND(info)]); 639 fprintf(out, "\tst_shndx: %lld\n", shndx); 640 } 641} 642 643void 644elf_print_dynamic(void *e, void *sh) 645{ 646 u_int64_t offset; 647 u_int64_t entsize; 648 u_int64_t size; 649 int64_t tag; 650 u_int64_t ptr; 651 u_int64_t val; 652 void *d; 653 int i; 654 655 offset = elf_get_off(e, sh, SH_OFFSET); 656 entsize = elf_get_size(e, sh, SH_ENTSIZE); 657 size = elf_get_size(e, sh, SH_SIZE); 658 fprintf(out, "\ndynamic:\n"); 659 for (i = 0; i < size / entsize; i++) { 660 d = e + offset + i * entsize; 661 tag = elf_get_size(e, d, D_TAG); 662 ptr = elf_get_size(e, d, D_PTR); 663 val = elf_get_addr(e, d, D_VAL); 664 fprintf(out, "\n"); 665 fprintf(out, "entry: %d\n", i); 666 fprintf(out, "\td_tag: %s\n", d_tags[tag]); 667 switch (tag) { 668 case DT_NEEDED: 669 case DT_SONAME: 670 case DT_RPATH: 671 fprintf(out, "\td_val: %s\n", dynstr + val); 672 break; 673 case DT_PLTRELSZ: 674 case DT_RELA: 675 case DT_RELASZ: 676 case DT_RELAENT: 677 case DT_STRSZ: 678 case DT_SYMENT: 679 case DT_RELSZ: 680 case DT_RELENT: 681 case DT_PLTREL: 682 fprintf(out, "\td_val: %lld\n", val); 683 break; 684 case DT_PLTGOT: 685 case DT_HASH: 686 case DT_STRTAB: 687 case DT_SYMTAB: 688 case DT_INIT: 689 case DT_FINI: 690 case DT_REL: 691 case DT_JMPREL: 692 fprintf(out, "\td_ptr: %#llx\n", ptr); 693 break; 694 case DT_NULL: 695 case DT_SYMBOLIC: 696 case DT_DEBUG: 697 case DT_TEXTREL: 698 break; 699 } 700 } 701} 702 703void 704elf_print_rela(void *e, void *sh) 705{ 706 u_int64_t offset; 707 u_int64_t entsize; 708 u_int64_t size; 709 u_int64_t name; 710 u_int64_t info; 711 int64_t addend; 712 void *ra; 713 void *v; 714 int i; 715 716 offset = elf_get_off(e, sh, SH_OFFSET); 717 entsize = elf_get_size(e, sh, SH_ENTSIZE); 718 size = elf_get_size(e, sh, SH_SIZE); 719 name = elf_get_word(e, sh, SH_NAME); 720 v = e + offset; 721 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name); 722 for (i = 0; i < size / entsize; i++) { 723 ra = v + i * entsize; 724 offset = elf_get_addr(e, ra, RA_OFFSET); 725 info = elf_get_word(e, ra, RA_INFO); 726 addend = elf_get_off(e, ra, RA_ADDEND); 727 fprintf(out, "\n"); 728 fprintf(out, "entry: %d\n", i); 729 fprintf(out, "\tr_offset: %#llx\n", offset); 730 fprintf(out, "\tr_info: %lld\n", info); 731 fprintf(out, "\tr_addend: %lld\n", addend); 732 } 733} 734 735void 736elf_print_rel(void *e, void *sh) 737{ 738 u_int64_t offset; 739 u_int64_t entsize; 740 u_int64_t size; 741 u_int64_t name; 742 u_int64_t info; 743 void *r; 744 void *v; 745 int i; 746 747 offset = elf_get_off(e, sh, SH_OFFSET); 748 entsize = elf_get_size(e, sh, SH_ENTSIZE); 749 size = elf_get_size(e, sh, SH_SIZE); 750 name = elf_get_word(e, sh, SH_NAME); 751 v = e + offset; 752 fprintf(out, "\nrelocation (%s):\n", shstrtab + name); 753 for (i = 0; i < size / entsize; i++) { 754 r = v + i * entsize; 755 offset = elf_get_addr(e, r, R_OFFSET); 756 info = elf_get_word(e, r, R_INFO); 757 fprintf(out, "\n"); 758 fprintf(out, "entry: %d\n", i); 759 fprintf(out, "\tr_offset: %#llx\n", offset); 760 fprintf(out, "\tr_info: %lld\n", info); 761 } 762} 763 764void 765elf_print_interp(void *e, void *p) 766{ 767 u_int64_t offset; 768 char *s; 769 770 offset = elf_get_off(e, p, P_OFFSET); 771 s = e + offset; 772 fprintf(out, "\ninterp:\n"); 773 fprintf(out, "\t%s\n", s); 774} 775 776void 777elf_print_got(void *e, void *sh) 778{ 779 u_int64_t offset; 780 u_int64_t addralign; 781 u_int64_t size; 782 u_int64_t addr; 783 void *v; 784 int i; 785 786 offset = elf_get_off(e, sh, SH_OFFSET); 787 addralign = elf_get_size(e, sh, SH_ADDRALIGN); 788 size = elf_get_size(e, sh, SH_SIZE); 789 v = e + offset; 790 fprintf(out, "\nglobal offset table:\n"); 791 for (i = 0; i < size / addralign; i++) { 792 addr = elf_get_addr(e, v + i * addralign, 0); 793 fprintf(out, "\n"); 794 fprintf(out, "entry: %d\n", i); 795 fprintf(out, "\t%#llx\n", addr); 796 } 797} 798 799void 800elf_print_hash(void *e, void *sh) 801{ 802} 803 804void 805elf_print_note(void *e, void *sh) 806{ 807 u_int64_t offset; 808 u_int64_t size; 809 u_int64_t name; 810 u_int32_t namesz; 811 u_int32_t descsz; 812 u_int32_t type; 813 u_int32_t desc; 814 char *s; 815 void *n; 816 817 offset = elf_get_off(e, sh, SH_OFFSET); 818 size = elf_get_size(e, sh, SH_SIZE); 819 name = elf_get_word(e, sh, SH_NAME); 820 n = e + offset; 821 fprintf(out, "\nnote (%s):\n", shstrtab + name); 822 while (n < e + offset + size) { 823 namesz = elf_get_word(e, n, N_NAMESZ); 824 descsz = elf_get_word(e, n, N_DESCSZ); 825 type = elf_get_word(e, n, N_TYPE); 826 s = n + sizeof(Elf_Note); 827 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0); 828 fprintf(out, "\t%s %d\n", s, desc); 829 n += sizeof(Elf_Note) + namesz + descsz; 830 } 831} 832 833u_int64_t 834elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member) 835{ 836 u_int64_t val; 837 u_char *p; 838 839 val = 0; 840 switch (e->e_ident[EI_CLASS]) { 841 case ELFCLASS32: 842 p = base + elf32_offsets[member]; 843 val = *p; 844 break; 845 case ELFCLASS64: 846 p = base + elf64_offsets[member]; 847 val = *p; 848 break; 849 case ELFCLASSNONE: 850 errx(1, "invalid class"); 851 } 852 853 return val; 854} 855 856u_int64_t 857elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member) 858{ 859 u_int64_t val; 860 u_char *p; 861 862 val = 0; 863 switch (e->e_ident[EI_CLASS]) { 864 case ELFCLASS32: 865 p = base + elf32_offsets[member]; 866 switch (e->e_ident[EI_DATA]) { 867 case ELFDATA2MSB: 868 val = p[0] << 8 | p[1]; 869 break; 870 case ELFDATA2LSB: 871 val = p[1] << 8 | p[0]; 872 break; 873 case ELFDATANONE: 874 errx(1, "invalid data format"); 875 } 876 break; 877 case ELFCLASS64: 878 p = base + elf64_offsets[member]; 879 switch (e->e_ident[EI_DATA]) { 880 case ELFDATA2MSB: 881 val = p[0] << 8 | p[1]; 882 break; 883 case ELFDATA2LSB: 884 val = p[1] << 8 | p[0]; 885 break; 886 case ELFDATANONE: 887 errx(1, "invalid data format"); 888 } 889 break; 890 case ELFCLASSNONE: 891 errx(1, "invalid class"); 892 } 893 894 return val; 895} 896 897u_int64_t 898elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member) 899{ 900 u_int64_t val; 901 u_char *p; 902 903 val = 0; 904 switch (e->e_ident[EI_CLASS]) { 905 case ELFCLASS32: 906 p = base + elf32_offsets[member]; 907 switch (e->e_ident[EI_DATA]) { 908 case ELFDATA2MSB: 909 val = p[0] << 8 | p[1]; 910 break; 911 case ELFDATA2LSB: 912 val = p[1] << 8 | p[0]; 913 break; 914 case ELFDATANONE: 915 errx(1, "invalid data format"); 916 } 917 break; 918 case ELFCLASS64: 919 p = base + elf64_offsets[member]; 920 switch (e->e_ident[EI_DATA]) { 921 case ELFDATA2MSB: 922 val = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3]; 923 break; 924 case ELFDATA2LSB: 925 val = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0]; 926 break; 927 case ELFDATANONE: 928 errx(1, "invalid data format"); 929 } 930 break; 931 case ELFCLASSNONE: 932 errx(1, "invalid class"); 933 } 934 935 return val; 936} 937 938u_int64_t 939elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member) 940{ 941 u_int64_t val; 942 u_char *p; 943 944 val = 0; 945 switch (e->e_ident[EI_CLASS]) { 946 case ELFCLASS32: 947 p = base + elf32_offsets[member]; 948 switch (e->e_ident[EI_DATA]) { 949 case ELFDATA2MSB: 950 val = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3]; 951 break; 952 case ELFDATA2LSB: 953 val = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0]; 954 break; 955 case ELFDATANONE: 956 errx(1, "invalid data format"); 957 } 958 break; 959 case ELFCLASS64: 960 p = base + elf64_offsets[member]; 961 switch (e->e_ident[EI_DATA]) { 962 case ELFDATA2MSB: 963 val = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3]; 964 break; 965 case ELFDATA2LSB: 966 val = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0]; 967 break; 968 case ELFDATANONE: 969 errx(1, "invalid data format"); 970 } 971 break; 972 case ELFCLASSNONE: 973 errx(1, "invalid class"); 974 } 975 976 return val; 977} 978 979u_int64_t 980elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member) 981{ 982 u_int64_t high; 983 u_int64_t low; 984 u_int64_t val; 985 u_char *p; 986 987 val = 0; 988 switch (e->e_ident[EI_CLASS]) { 989 case ELFCLASS32: 990 p = base + elf32_offsets[member]; 991 switch (e->e_ident[EI_DATA]) { 992 case ELFDATA2MSB: 993 val = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3]; 994 break; 995 case ELFDATA2LSB: 996 val = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0]; 997 break; 998 case ELFDATANONE: 999 errx(1, "invalid data format"); 1000 } 1001 break; 1002 case ELFCLASS64: 1003 p = base + elf64_offsets[member]; 1004 switch (e->e_ident[EI_DATA]) { 1005 case ELFDATA2MSB: 1006 high = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3]; 1007 low = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7]; 1008 val = high << 32 | low; 1009 break; 1010 case ELFDATA2LSB: 1011 high = p[7] << 24 | p[6] << 16 | p[5] << 8 | p[4]; 1012 low = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0]; 1013 val = high << 32 | low; 1014 break; 1015 case ELFDATANONE: 1016 errx(1, "invalid data format"); 1017 } 1018 break; 1019 case ELFCLASSNONE: 1020 errx(1, "invalid class"); 1021 } 1022 1023 return val; 1024} 1025 1026void 1027usage(void) 1028{ 1029 fprintf(stderr, "usage: elfdump [-acdeiGhnprs] [-w file] filename\n"); 1030 exit(1); 1031} 1032