1 /*- 2 * Copyright (c) 2003 David O'Brien. All rights reserved. 3 * Copyright (c) 2001 Jake Burkholder 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/types.h> 32 #include <sys/elf32.h> 33 #include <sys/elf64.h> 34 #include <sys/endian.h> 35 #include <sys/mman.h> 36 #include <sys/stat.h> 37 #include <err.h> 38 #include <fcntl.h> 39 #include <inttypes.h> 40 #include <stddef.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #define ED_DYN (1<<0) 47 #define ED_EHDR (1<<1) 48 #define ED_GOT (1<<2) 49 #define ED_HASH (1<<3) 50 #define ED_INTERP (1<<4) 51 #define ED_NOTE (1<<5) 52 #define ED_PHDR (1<<6) 53 #define ED_REL (1<<7) 54 #define ED_SHDR (1<<8) 55 #define ED_SYMTAB (1<<9) 56 #define ED_ALL ((1<<10)-1) 57 58 #define elf_get_addr elf_get_quad 59 #define elf_get_off elf_get_quad 60 #define elf_get_size elf_get_quad 61 62 enum elf_member { 63 D_TAG = 1, D_PTR, D_VAL, 64 65 E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY, 66 E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE, 67 E_SHNUM, E_SHSTRNDX, 68 69 N_NAMESZ, N_DESCSZ, N_TYPE, 70 71 P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS, 72 P_ALIGN, 73 74 SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK, 75 SH_INFO, SH_ADDRALIGN, SH_ENTSIZE, 76 77 ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX, 78 79 R_OFFSET, R_INFO, 80 81 RA_OFFSET, RA_INFO, RA_ADDEND 82 }; 83 84 typedef enum elf_member elf_member_t; 85 86 int elf32_offsets[] = { 87 0, 88 89 offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr), 90 offsetof(Elf32_Dyn, d_un.d_val), 91 92 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), 93 offsetof(Elf32_Ehdr, e_ident[EI_DATA]), 94 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), 95 offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine), 96 offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry), 97 offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff), 98 offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize), 99 offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum), 100 offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum), 101 offsetof(Elf32_Ehdr, e_shstrndx), 102 103 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), 104 offsetof(Elf_Note, n_type), 105 106 offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset), 107 offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr), 108 offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz), 109 offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align), 110 111 offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type), 112 offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr), 113 offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size), 114 offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info), 115 offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize), 116 117 offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value), 118 offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info), 119 offsetof(Elf32_Sym, st_shndx), 120 121 offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info), 122 123 offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info), 124 offsetof(Elf32_Rela, r_addend) 125 }; 126 127 int elf64_offsets[] = { 128 0, 129 130 offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr), 131 offsetof(Elf64_Dyn, d_un.d_val), 132 133 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), 134 offsetof(Elf32_Ehdr, e_ident[EI_DATA]), 135 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), 136 offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine), 137 offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry), 138 offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff), 139 offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize), 140 offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum), 141 offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum), 142 offsetof(Elf64_Ehdr, e_shstrndx), 143 144 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), 145 offsetof(Elf_Note, n_type), 146 147 offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset), 148 offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr), 149 offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz), 150 offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align), 151 152 offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type), 153 offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr), 154 offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size), 155 offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info), 156 offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize), 157 158 offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value), 159 offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info), 160 offsetof(Elf64_Sym, st_shndx), 161 162 offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info), 163 164 offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info), 165 offsetof(Elf64_Rela, r_addend) 166 }; 167 168 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */ 169 static const char * 170 d_tags(u_int64_t tag) { 171 switch (tag) { 172 case 0: return "DT_NULL"; 173 case 1: return "DT_NEEDED"; 174 case 2: return "DT_PLTRELSZ"; 175 case 3: return "DT_PLTGOT"; 176 case 4: return "DT_HASH"; 177 case 5: return "DT_STRTAB"; 178 case 6: return "DT_SYMTAB"; 179 case 7: return "DT_RELA"; 180 case 8: return "DT_RELASZ"; 181 case 9: return "DT_RELAENT"; 182 case 10: return "DT_STRSZ"; 183 case 11: return "DT_SYMENT"; 184 case 12: return "DT_INIT"; 185 case 13: return "DT_FINI"; 186 case 14: return "DT_SONAME"; 187 case 15: return "DT_RPATH"; 188 case 16: return "DT_SYMBOLIC"; 189 case 17: return "DT_REL"; 190 case 18: return "DT_RELSZ"; 191 case 19: return "DT_RELENT"; 192 case 20: return "DT_PLTREL"; 193 case 21: return "DT_DEBUG"; 194 case 22: return "DT_TEXTREL"; 195 case 23: return "DT_JMPREL"; 196 case 24: return "DT_BIND_NOW"; 197 case 25: return "DT_INIT_ARRAY"; 198 case 26: return "DT_FINI_ARRAY"; 199 case 27: return "DT_INIT_ARRAYSZ"; 200 case 28: return "DT_FINI_ARRAYSZ"; 201 case 29: return "DT_RUNPATH"; 202 case 30: return "DT_FLAGS"; 203 case 32: return "DT_PREINIT_ARRAY"; /* XXX: DT_ENCODING */ 204 case 33: return "DT_PREINIT_ARRAYSZ"; 205 /* 0x6000000D - 0x6ffff000 operating system-specific semantics */ 206 case 0x6ffffdf5: return "DT_GNU_PRELINKED"; 207 case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ"; 208 case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ"; 209 case 0x6ffffdf8: return "DT_SUNW_CHECKSUM"; 210 case 0x6ffffdf9: return "DT_PLTPADSZ"; 211 case 0x6ffffdfa: return "DT_MOVEENT"; 212 case 0x6ffffdfb: return "DT_MOVESZ"; 213 case 0x6ffffdfc: return "DT_FEATURE"; 214 case 0x6ffffdfd: return "DT_POSFLAG_1"; 215 case 0x6ffffdfe: return "DT_SYMINSZ"; 216 case 0x6ffffdff: return "DT_SYMINENT (DT_VALRNGHI)"; 217 case 0x6ffffe00: return "DT_ADDRRNGLO"; 218 case 0x6ffffef8: return "DT_GNU_CONFLICT"; 219 case 0x6ffffef9: return "DT_GNU_LIBLIST"; 220 case 0x6ffffefa: return "DT_SUNW_CONFIG"; 221 case 0x6ffffefb: return "DT_SUNW_DEPAUDIT"; 222 case 0x6ffffefc: return "DT_SUNW_AUDIT"; 223 case 0x6ffffefd: return "DT_SUNW_PLTPAD"; 224 case 0x6ffffefe: return "DT_SUNW_MOVETAB"; 225 case 0x6ffffeff: return "DT_SYMINFO (DT_ADDRRNGHI)"; 226 case 0x6ffffff9: return "DT_RELACOUNT"; 227 case 0x6ffffffa: return "DT_RELCOUNT"; 228 case 0x6ffffffb: return "DT_FLAGS_1"; 229 case 0x6ffffffc: return "DT_VERDEF"; 230 case 0x6ffffffd: return "DT_VERDEFNUM"; 231 case 0x6ffffffe: return "DT_VERNEED"; 232 case 0x6fffffff: return "DT_VERNEEDNUM"; 233 case 0x6ffffff0: return "DT_GNU_VERSYM"; 234 /* 0x70000000 - 0x7fffffff processor-specific semantics */ 235 case 0x70000000: return "DT_IA_64_PLT_RESERVE"; 236 case 0x7ffffffd: return "DT_SUNW_AUXILIARY"; 237 case 0x7ffffffe: return "DT_SUNW_USED"; 238 case 0x7fffffff: return "DT_SUNW_FILTER"; 239 default: return "ERROR: TAG NOT DEFINED"; 240 } 241 } 242 243 static const char * 244 e_machines(u_int mach) 245 { 246 static char machdesc[64]; 247 248 switch (mach) { 249 case EM_NONE: return "EM_NONE"; 250 case EM_M32: return "EM_M32"; 251 case EM_SPARC: return "EM_SPARC"; 252 case EM_386: return "EM_386"; 253 case EM_68K: return "EM_68K"; 254 case EM_88K: return "EM_88K"; 255 case EM_860: return "EM_860"; 256 case EM_MIPS: return "EM_MIPS"; 257 case EM_PPC: return "EM_PPC"; 258 case EM_ARM: return "EM_ARM"; 259 case EM_ALPHA: return "EM_ALPHA (legacy)"; 260 case EM_SPARCV9:return "EM_SPARCV9"; 261 case EM_IA_64: return "EM_IA_64"; 262 case EM_X86_64: return "EM_X86_64"; 263 } 264 snprintf(machdesc, sizeof(machdesc), 265 "(unknown machine) -- type 0x%x", mach); 266 return (machdesc); 267 } 268 269 const char *e_types[] = { 270 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE" 271 }; 272 273 const char *ei_versions[] = { 274 "EV_NONE", "EV_CURRENT" 275 }; 276 277 const char *ei_classes[] = { 278 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64" 279 }; 280 281 const char *ei_data[] = { 282 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB" 283 }; 284 285 const char *ei_abis[256] = { 286 "ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX", 287 "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX", 288 "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64", 289 "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD", 290 [255] = "ELFOSABI_STANDALONE" 291 }; 292 293 const char *p_types[] = { 294 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE", 295 "PT_SHLIB", "PT_PHDR", "PT_TLS" 296 }; 297 298 const char *p_flags[] = { 299 "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R", 300 "PF_X|PF_W|PF_R" 301 }; 302 303 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */ 304 static const char * 305 sh_types(u_int64_t sht) { 306 switch (sht) { 307 case 0: return "SHT_NULL"; 308 case 1: return "SHT_PROGBITS"; 309 case 2: return "SHT_SYMTAB"; 310 case 3: return "SHT_STRTAB"; 311 case 4: return "SHT_RELA"; 312 case 5: return "SHT_HASH"; 313 case 6: return "SHT_DYNAMIC"; 314 case 7: return "SHT_NOTE"; 315 case 8: return "SHT_NOBITS"; 316 case 9: return "SHT_REL"; 317 case 10: return "SHT_SHLIB"; 318 case 11: return "SHT_DYNSYM"; 319 case 14: return "SHT_INIT_ARRAY"; 320 case 15: return "SHT_FINI_ARRAY"; 321 case 16: return "SHT_PREINIT_ARRAY"; 322 case 17: return "SHT_GROUP"; 323 case 18: return "SHT_SYMTAB_SHNDX"; 324 /* 0x60000000 - 0x6fffffff operating system-specific semantics */ 325 case 0x6ffffff0: return "XXX:VERSYM"; 326 case 0x6ffffff4: return "SHT_SUNW_dof"; 327 case 0x6ffffff7: return "SHT_GNU_LIBLIST"; 328 case 0x6ffffffc: return "XXX:VERDEF"; 329 case 0x6ffffffd: return "SHT_SUNW(GNU)_verdef"; 330 case 0x6ffffffe: return "SHT_SUNW(GNU)_verneed"; 331 case 0x6fffffff: return "SHT_SUNW(GNU)_versym"; 332 /* 0x70000000 - 0x7fffffff processor-specific semantics */ 333 case 0x70000000: return "SHT_IA_64_EXT"; 334 case 0x70000001: return "SHT_IA_64_UNWIND"; 335 case 0x7ffffffd: return "XXX:AUXILIARY"; 336 case 0x7fffffff: return "XXX:FILTER"; 337 /* 0x80000000 - 0xffffffff application programs */ 338 default: return "ERROR: SHT NOT DEFINED"; 339 } 340 } 341 342 const char *sh_flags[] = { 343 "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR", 344 "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR", 345 "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR" 346 }; 347 348 const char *st_types[] = { 349 "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE" 350 }; 351 352 const char *st_bindings[] = { 353 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK" 354 }; 355 356 char *dynstr; 357 char *shstrtab; 358 char *strtab; 359 FILE *out; 360 361 u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member); 362 u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member); 363 u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member); 364 u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member); 365 u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member); 366 367 void elf_print_ehdr(Elf32_Ehdr *e); 368 void elf_print_phdr(Elf32_Ehdr *e, void *p); 369 void elf_print_shdr(Elf32_Ehdr *e, void *sh); 370 void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str); 371 void elf_print_dynamic(Elf32_Ehdr *e, void *sh); 372 void elf_print_rel(Elf32_Ehdr *e, void *r); 373 void elf_print_rela(Elf32_Ehdr *e, void *ra); 374 void elf_print_interp(Elf32_Ehdr *e, void *p); 375 void elf_print_got(Elf32_Ehdr *e, void *sh); 376 void elf_print_hash(Elf32_Ehdr *e, void *sh); 377 void elf_print_note(Elf32_Ehdr *e, void *sh); 378 379 void usage(void); 380 381 int 382 main(int ac, char **av) 383 { 384 u_int64_t phoff; 385 u_int64_t shoff; 386 u_int64_t phentsize; 387 u_int64_t phnum; 388 u_int64_t shentsize; 389 u_int64_t shnum; 390 u_int64_t shstrndx; 391 u_int64_t offset; 392 u_int64_t name; 393 u_int64_t type; 394 struct stat sb; 395 u_int flags; 396 Elf32_Ehdr *e; 397 void *p; 398 void *sh; 399 void *v; 400 int fd; 401 int ch; 402 int i; 403 404 out = stdout; 405 flags = 0; 406 while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1) 407 switch (ch) { 408 case 'a': 409 flags = ED_ALL; 410 break; 411 case 'c': 412 flags |= ED_SHDR; 413 break; 414 case 'd': 415 flags |= ED_DYN; 416 break; 417 case 'e': 418 flags |= ED_EHDR; 419 break; 420 case 'i': 421 flags |= ED_INTERP; 422 break; 423 case 'G': 424 flags |= ED_GOT; 425 break; 426 case 'h': 427 flags |= ED_HASH; 428 break; 429 case 'n': 430 flags |= ED_NOTE; 431 break; 432 case 'p': 433 flags |= ED_PHDR; 434 break; 435 case 'r': 436 flags |= ED_REL; 437 break; 438 case 's': 439 flags |= ED_SYMTAB; 440 break; 441 case 'w': 442 if ((out = fopen(optarg, "w")) == NULL) 443 err(1, "%s", optarg); 444 break; 445 case '?': 446 default: 447 usage(); 448 } 449 ac -= optind; 450 av += optind; 451 if (ac == 0 || flags == 0) 452 usage(); 453 if ((fd = open(*av, O_RDONLY)) < 0 || 454 fstat(fd, &sb) < 0) 455 err(1, "%s", *av); 456 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); 457 if (e == MAP_FAILED) 458 err(1, NULL); 459 if (!IS_ELF(*(Elf32_Ehdr *)e)) 460 errx(1, "not an elf file"); 461 phoff = elf_get_off(e, e, E_PHOFF); 462 shoff = elf_get_off(e, e, E_SHOFF); 463 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 464 phnum = elf_get_quarter(e, e, E_PHNUM); 465 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 466 shnum = elf_get_quarter(e, e, E_SHNUM); 467 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 468 p = (char *)e + phoff; 469 sh = (char *)e + shoff; 470 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize, SH_OFFSET); 471 shstrtab = (char *)e + offset; 472 for (i = 0; (u_int64_t)i < shnum; i++) { 473 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME); 474 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET); 475 if (strcmp(shstrtab + name, ".strtab") == 0) 476 strtab = (char *)e + offset; 477 if (strcmp(shstrtab + name, ".dynstr") == 0) 478 dynstr = (char *)e + offset; 479 } 480 if (flags & ED_EHDR) 481 elf_print_ehdr(e); 482 if (flags & ED_PHDR) 483 elf_print_phdr(e, p); 484 if (flags & ED_SHDR) 485 elf_print_shdr(e, sh); 486 for (i = 0; (u_int64_t)i < phnum; i++) { 487 v = (char *)p + i * phentsize; 488 type = elf_get_word(e, v, P_TYPE); 489 switch (type) { 490 case PT_INTERP: 491 if (flags & ED_INTERP) 492 elf_print_interp(e, v); 493 break; 494 case PT_NULL: 495 case PT_LOAD: 496 case PT_DYNAMIC: 497 case PT_NOTE: 498 case PT_SHLIB: 499 case PT_PHDR: 500 break; 501 } 502 } 503 for (i = 0; (u_int64_t)i < shnum; i++) { 504 v = (char *)sh + i * shentsize; 505 type = elf_get_word(e, v, SH_TYPE); 506 switch (type) { 507 case SHT_SYMTAB: 508 if (flags & ED_SYMTAB) 509 elf_print_symtab(e, v, strtab); 510 break; 511 case SHT_DYNAMIC: 512 if (flags & ED_DYN) 513 elf_print_dynamic(e, v); 514 break; 515 case SHT_RELA: 516 if (flags & ED_REL) 517 elf_print_rela(e, v); 518 break; 519 case SHT_REL: 520 if (flags & ED_REL) 521 elf_print_rel(e, v); 522 break; 523 case SHT_NOTE: 524 name = elf_get_word(e, v, SH_NAME); 525 if (flags & ED_NOTE && 526 strcmp(shstrtab + name, ".note.ABI-tag") == 0) 527 elf_print_note(e, v); 528 break; 529 case SHT_DYNSYM: 530 if (flags & ED_SYMTAB) 531 elf_print_symtab(e, v, dynstr); 532 break; 533 case SHT_PROGBITS: 534 name = elf_get_word(e, v, SH_NAME); 535 if (flags & ED_GOT && 536 strcmp(shstrtab + name, ".got") == 0) 537 elf_print_got(e, v); 538 break; 539 case SHT_HASH: 540 if (flags & ED_HASH) 541 elf_print_hash(e, v); 542 break; 543 case SHT_NULL: 544 case SHT_STRTAB: 545 case SHT_NOBITS: 546 case SHT_SHLIB: 547 break; 548 } 549 } 550 551 return 0; 552 } 553 554 void 555 elf_print_ehdr(Elf32_Ehdr *e) 556 { 557 u_int64_t class; 558 u_int64_t data; 559 u_int64_t osabi; 560 u_int64_t type; 561 u_int64_t machine; 562 u_int64_t version; 563 u_int64_t entry; 564 u_int64_t phoff; 565 u_int64_t shoff; 566 u_int64_t flags; 567 u_int64_t ehsize; 568 u_int64_t phentsize; 569 u_int64_t phnum; 570 u_int64_t shentsize; 571 u_int64_t shnum; 572 u_int64_t shstrndx; 573 574 class = elf_get_byte(e, e, E_CLASS); 575 data = elf_get_byte(e, e, E_DATA); 576 osabi = elf_get_byte(e, e, E_OSABI); 577 type = elf_get_quarter(e, e, E_TYPE); 578 machine = elf_get_quarter(e, e, E_MACHINE); 579 version = elf_get_word(e, e, E_VERSION); 580 entry = elf_get_addr(e, e, E_ENTRY); 581 phoff = elf_get_off(e, e, E_PHOFF); 582 shoff = elf_get_off(e, e, E_SHOFF); 583 flags = elf_get_word(e, e, E_FLAGS); 584 ehsize = elf_get_quarter(e, e, E_EHSIZE); 585 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 586 phnum = elf_get_quarter(e, e, E_PHNUM); 587 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 588 shnum = elf_get_quarter(e, e, E_SHNUM); 589 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 590 fprintf(out, "\nelf header:\n"); 591 fprintf(out, "\n"); 592 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data], 593 ei_abis[osabi]); 594 fprintf(out, "\te_type: %s\n", e_types[type]); 595 fprintf(out, "\te_machine: %s\n", e_machines(machine)); 596 fprintf(out, "\te_version: %s\n", ei_versions[version]); 597 fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry); 598 fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff); 599 fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff); 600 fprintf(out, "\te_flags: %jd\n", (intmax_t)flags); 601 fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize); 602 fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize); 603 fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum); 604 fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize); 605 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum); 606 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx); 607 } 608 609 void 610 elf_print_phdr(Elf32_Ehdr *e, void *p) 611 { 612 u_int64_t phentsize; 613 u_int64_t phnum; 614 u_int64_t type; 615 u_int64_t offset; 616 u_int64_t vaddr; 617 u_int64_t paddr; 618 u_int64_t filesz; 619 u_int64_t memsz; 620 u_int64_t flags; 621 u_int64_t align; 622 void *v; 623 int i; 624 625 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 626 phnum = elf_get_quarter(e, e, E_PHNUM); 627 fprintf(out, "\nprogram header:\n"); 628 for (i = 0; (u_int64_t)i < phnum; i++) { 629 v = (char *)p + i * phentsize; 630 type = elf_get_word(e, v, P_TYPE); 631 offset = elf_get_off(e, v, P_OFFSET); 632 vaddr = elf_get_addr(e, v, P_VADDR); 633 paddr = elf_get_addr(e, v, P_PADDR); 634 filesz = elf_get_size(e, v, P_FILESZ); 635 memsz = elf_get_size(e, v, P_MEMSZ); 636 flags = elf_get_word(e, v, P_FLAGS); 637 align = elf_get_size(e, v, P_ALIGN); 638 fprintf(out, "\n"); 639 fprintf(out, "entry: %d\n", i); 640 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]); 641 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset); 642 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr); 643 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr); 644 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz); 645 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz); 646 fprintf(out, "\tp_flags: %s\n", p_flags[flags]); 647 fprintf(out, "\tp_align: %jd\n", (intmax_t)align); 648 } 649 } 650 651 void 652 elf_print_shdr(Elf32_Ehdr *e, void *sh) 653 { 654 u_int64_t shentsize; 655 u_int64_t shnum; 656 u_int64_t name; 657 u_int64_t type; 658 u_int64_t flags; 659 u_int64_t addr; 660 u_int64_t offset; 661 u_int64_t size; 662 u_int64_t shlink; 663 u_int64_t info; 664 u_int64_t addralign; 665 u_int64_t entsize; 666 void *v; 667 int i; 668 669 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 670 shnum = elf_get_quarter(e, e, E_SHNUM); 671 fprintf(out, "\nsection header:\n"); 672 for (i = 0; (u_int64_t)i < shnum; i++) { 673 v = (char *)sh + i * shentsize; 674 name = elf_get_word(e, v, SH_NAME); 675 type = elf_get_word(e, v, SH_TYPE); 676 flags = elf_get_word(e, v, SH_FLAGS); 677 addr = elf_get_addr(e, v, SH_ADDR); 678 offset = elf_get_off(e, v, SH_OFFSET); 679 size = elf_get_size(e, v, SH_SIZE); 680 shlink = elf_get_word(e, v, SH_LINK); 681 info = elf_get_word(e, v, SH_INFO); 682 addralign = elf_get_size(e, v, SH_ADDRALIGN); 683 entsize = elf_get_size(e, v, SH_ENTSIZE); 684 fprintf(out, "\n"); 685 fprintf(out, "entry: %d\n", i); 686 fprintf(out, "\tsh_name: %s\n", shstrtab + name); 687 fprintf(out, "\tsh_type: %s\n", sh_types(type)); 688 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]); 689 fprintf(out, "\tsh_addr: %#jx\n", addr); 690 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset); 691 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size); 692 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink); 693 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info); 694 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign); 695 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize); 696 } 697 } 698 699 void 700 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str) 701 { 702 u_int64_t offset; 703 u_int64_t entsize; 704 u_int64_t size; 705 u_int64_t name; 706 u_int64_t value; 707 u_int64_t info; 708 u_int64_t shndx; 709 void *st; 710 int len; 711 int i; 712 713 offset = elf_get_off(e, sh, SH_OFFSET); 714 entsize = elf_get_size(e, sh, SH_ENTSIZE); 715 size = elf_get_size(e, sh, SH_SIZE); 716 name = elf_get_word(e, sh, SH_NAME); 717 len = size / entsize; 718 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name); 719 for (i = 0; i < len; i++) { 720 st = (char *)e + offset + i * entsize; 721 name = elf_get_word(e, st, ST_NAME); 722 value = elf_get_addr(e, st, ST_VALUE); 723 size = elf_get_size(e, st, ST_SIZE); 724 info = elf_get_byte(e, st, ST_INFO); 725 shndx = elf_get_quarter(e, st, ST_SHNDX); 726 fprintf(out, "\n"); 727 fprintf(out, "entry: %d\n", i); 728 fprintf(out, "\tst_name: %s\n", str + name); 729 fprintf(out, "\tst_value: %#jx\n", value); 730 fprintf(out, "\tst_size: %jd\n", (intmax_t)size); 731 fprintf(out, "\tst_info: %s %s\n", 732 st_types[ELF32_ST_TYPE(info)], 733 st_bindings[ELF32_ST_BIND(info)]); 734 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx); 735 } 736 } 737 738 void 739 elf_print_dynamic(Elf32_Ehdr *e, void *sh) 740 { 741 u_int64_t offset; 742 u_int64_t entsize; 743 u_int64_t size; 744 int64_t tag; 745 u_int64_t ptr; 746 u_int64_t val; 747 void *d; 748 int i; 749 750 offset = elf_get_off(e, sh, SH_OFFSET); 751 entsize = elf_get_size(e, sh, SH_ENTSIZE); 752 size = elf_get_size(e, sh, SH_SIZE); 753 fprintf(out, "\ndynamic:\n"); 754 for (i = 0; (u_int64_t)i < size / entsize; i++) { 755 d = (char *)e + offset + i * entsize; 756 tag = elf_get_size(e, d, D_TAG); 757 ptr = elf_get_size(e, d, D_PTR); 758 val = elf_get_addr(e, d, D_VAL); 759 fprintf(out, "\n"); 760 fprintf(out, "entry: %d\n", i); 761 fprintf(out, "\td_tag: %s\n", d_tags(tag)); 762 switch (tag) { 763 case DT_NEEDED: 764 case DT_SONAME: 765 case DT_RPATH: 766 fprintf(out, "\td_val: %s\n", dynstr + val); 767 break; 768 case DT_PLTRELSZ: 769 case DT_RELA: 770 case DT_RELASZ: 771 case DT_RELAENT: 772 case DT_STRSZ: 773 case DT_SYMENT: 774 case DT_RELSZ: 775 case DT_RELENT: 776 case DT_PLTREL: 777 fprintf(out, "\td_val: %jd\n", (intmax_t)val); 778 break; 779 case DT_PLTGOT: 780 case DT_HASH: 781 case DT_STRTAB: 782 case DT_SYMTAB: 783 case DT_INIT: 784 case DT_FINI: 785 case DT_REL: 786 case DT_JMPREL: 787 fprintf(out, "\td_ptr: %#jx\n", ptr); 788 break; 789 case DT_NULL: 790 case DT_SYMBOLIC: 791 case DT_DEBUG: 792 case DT_TEXTREL: 793 break; 794 } 795 } 796 } 797 798 void 799 elf_print_rela(Elf32_Ehdr *e, void *sh) 800 { 801 u_int64_t offset; 802 u_int64_t entsize; 803 u_int64_t size; 804 u_int64_t name; 805 u_int64_t info; 806 int64_t addend; 807 void *ra; 808 void *v; 809 int i; 810 811 offset = elf_get_off(e, sh, SH_OFFSET); 812 entsize = elf_get_size(e, sh, SH_ENTSIZE); 813 size = elf_get_size(e, sh, SH_SIZE); 814 name = elf_get_word(e, sh, SH_NAME); 815 v = (char *)e + offset; 816 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name); 817 for (i = 0; (u_int64_t)i < size / entsize; i++) { 818 ra = (char *)v + i * entsize; 819 offset = elf_get_addr(e, ra, RA_OFFSET); 820 info = elf_get_word(e, ra, RA_INFO); 821 addend = elf_get_off(e, ra, RA_ADDEND); 822 fprintf(out, "\n"); 823 fprintf(out, "entry: %d\n", i); 824 fprintf(out, "\tr_offset: %#jx\n", offset); 825 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 826 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend); 827 } 828 } 829 830 void 831 elf_print_rel(Elf32_Ehdr *e, void *sh) 832 { 833 u_int64_t offset; 834 u_int64_t entsize; 835 u_int64_t size; 836 u_int64_t name; 837 u_int64_t info; 838 void *r; 839 void *v; 840 int i; 841 842 offset = elf_get_off(e, sh, SH_OFFSET); 843 entsize = elf_get_size(e, sh, SH_ENTSIZE); 844 size = elf_get_size(e, sh, SH_SIZE); 845 name = elf_get_word(e, sh, SH_NAME); 846 v = (char *)e + offset; 847 fprintf(out, "\nrelocation (%s):\n", shstrtab + name); 848 for (i = 0; (u_int64_t)i < size / entsize; i++) { 849 r = (char *)v + i * entsize; 850 offset = elf_get_addr(e, r, R_OFFSET); 851 info = elf_get_word(e, r, R_INFO); 852 fprintf(out, "\n"); 853 fprintf(out, "entry: %d\n", i); 854 fprintf(out, "\tr_offset: %#jx\n", offset); 855 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 856 } 857 } 858 859 void 860 elf_print_interp(Elf32_Ehdr *e, void *p) 861 { 862 u_int64_t offset; 863 char *s; 864 865 offset = elf_get_off(e, p, P_OFFSET); 866 s = (char *)e + offset; 867 fprintf(out, "\ninterp:\n"); 868 fprintf(out, "\t%s\n", s); 869 } 870 871 void 872 elf_print_got(Elf32_Ehdr *e, void *sh) 873 { 874 u_int64_t offset; 875 u_int64_t addralign; 876 u_int64_t size; 877 u_int64_t addr; 878 void *v; 879 int i; 880 881 offset = elf_get_off(e, sh, SH_OFFSET); 882 addralign = elf_get_size(e, sh, SH_ADDRALIGN); 883 size = elf_get_size(e, sh, SH_SIZE); 884 v = (char *)e + offset; 885 fprintf(out, "\nglobal offset table:\n"); 886 for (i = 0; (u_int64_t)i < size / addralign; i++) { 887 addr = elf_get_addr(e, (char *)v + i * addralign, 0); 888 fprintf(out, "\n"); 889 fprintf(out, "entry: %d\n", i); 890 fprintf(out, "\t%#jx\n", addr); 891 } 892 } 893 894 void 895 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused) 896 { 897 } 898 899 void 900 elf_print_note(Elf32_Ehdr *e, void *sh) 901 { 902 u_int64_t offset; 903 u_int64_t size; 904 u_int64_t name; 905 u_int32_t namesz; 906 u_int32_t descsz; 907 u_int32_t type; 908 u_int32_t desc; 909 char *n, *s; 910 911 offset = elf_get_off(e, sh, SH_OFFSET); 912 size = elf_get_size(e, sh, SH_SIZE); 913 name = elf_get_word(e, sh, SH_NAME); 914 n = (char *)e + offset; 915 fprintf(out, "\nnote (%s):\n", shstrtab + name); 916 while (n < ((char *)e + offset + size)) { 917 namesz = elf_get_word(e, n, N_NAMESZ); 918 descsz = elf_get_word(e, n, N_DESCSZ); 919 type = elf_get_word(e, n, N_TYPE); 920 s = n + sizeof(Elf_Note); 921 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0); 922 fprintf(out, "\t%s %d\n", s, desc); 923 n += sizeof(Elf_Note) + namesz + descsz; 924 } 925 } 926 927 u_int64_t 928 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member) 929 { 930 u_int64_t val; 931 932 val = 0; 933 switch (e->e_ident[EI_CLASS]) { 934 case ELFCLASS32: 935 val = ((uint8_t *)base)[elf32_offsets[member]]; 936 break; 937 case ELFCLASS64: 938 val = ((uint8_t *)base)[elf64_offsets[member]]; 939 break; 940 case ELFCLASSNONE: 941 errx(1, "invalid class"); 942 } 943 944 return val; 945 } 946 947 u_int64_t 948 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member) 949 { 950 u_int64_t val; 951 952 val = 0; 953 switch (e->e_ident[EI_CLASS]) { 954 case ELFCLASS32: 955 base = (char *)base + elf32_offsets[member]; 956 switch (e->e_ident[EI_DATA]) { 957 case ELFDATA2MSB: 958 val = be16dec(base); 959 break; 960 case ELFDATA2LSB: 961 val = le16dec(base); 962 break; 963 case ELFDATANONE: 964 errx(1, "invalid data format"); 965 } 966 break; 967 case ELFCLASS64: 968 base = (char *)base + elf64_offsets[member]; 969 switch (e->e_ident[EI_DATA]) { 970 case ELFDATA2MSB: 971 val = be16dec(base); 972 break; 973 case ELFDATA2LSB: 974 val = le16dec(base); 975 break; 976 case ELFDATANONE: 977 errx(1, "invalid data format"); 978 } 979 break; 980 case ELFCLASSNONE: 981 errx(1, "invalid class"); 982 } 983 984 return val; 985 } 986 987 u_int64_t 988 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member) 989 { 990 u_int64_t val; 991 992 val = 0; 993 switch (e->e_ident[EI_CLASS]) { 994 case ELFCLASS32: 995 base = (char *)base + elf32_offsets[member]; 996 switch (e->e_ident[EI_DATA]) { 997 case ELFDATA2MSB: 998 val = be16dec(base); 999 break; 1000 case ELFDATA2LSB: 1001 val = le16dec(base); 1002 break; 1003 case ELFDATANONE: 1004 errx(1, "invalid data format"); 1005 } 1006 break; 1007 case ELFCLASS64: 1008 base = (char *)base + elf64_offsets[member]; 1009 switch (e->e_ident[EI_DATA]) { 1010 case ELFDATA2MSB: 1011 val = be32dec(base); 1012 break; 1013 case ELFDATA2LSB: 1014 val = le32dec(base); 1015 break; 1016 case ELFDATANONE: 1017 errx(1, "invalid data format"); 1018 } 1019 break; 1020 case ELFCLASSNONE: 1021 errx(1, "invalid class"); 1022 } 1023 1024 return val; 1025 } 1026 1027 u_int64_t 1028 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member) 1029 { 1030 u_int64_t val; 1031 1032 val = 0; 1033 switch (e->e_ident[EI_CLASS]) { 1034 case ELFCLASS32: 1035 base = (char *)base + elf32_offsets[member]; 1036 switch (e->e_ident[EI_DATA]) { 1037 case ELFDATA2MSB: 1038 val = be32dec(base); 1039 break; 1040 case ELFDATA2LSB: 1041 val = le32dec(base); 1042 break; 1043 case ELFDATANONE: 1044 errx(1, "invalid data format"); 1045 } 1046 break; 1047 case ELFCLASS64: 1048 base = (char *)base + elf64_offsets[member]; 1049 switch (e->e_ident[EI_DATA]) { 1050 case ELFDATA2MSB: 1051 val = be32dec(base); 1052 break; 1053 case ELFDATA2LSB: 1054 val = le32dec(base); 1055 break; 1056 case ELFDATANONE: 1057 errx(1, "invalid data format"); 1058 } 1059 break; 1060 case ELFCLASSNONE: 1061 errx(1, "invalid class"); 1062 } 1063 1064 return val; 1065 } 1066 1067 u_int64_t 1068 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member) 1069 { 1070 u_int64_t val; 1071 1072 val = 0; 1073 switch (e->e_ident[EI_CLASS]) { 1074 case ELFCLASS32: 1075 base = (char *)base + elf32_offsets[member]; 1076 switch (e->e_ident[EI_DATA]) { 1077 case ELFDATA2MSB: 1078 val = be32dec(base); 1079 break; 1080 case ELFDATA2LSB: 1081 val = le32dec(base); 1082 break; 1083 case ELFDATANONE: 1084 errx(1, "invalid data format"); 1085 } 1086 break; 1087 case ELFCLASS64: 1088 base = (char *)base + elf64_offsets[member]; 1089 switch (e->e_ident[EI_DATA]) { 1090 case ELFDATA2MSB: 1091 val = be64dec(base); 1092 break; 1093 case ELFDATA2LSB: 1094 val = le64dec(base); 1095 break; 1096 case ELFDATANONE: 1097 errx(1, "invalid data format"); 1098 } 1099 break; 1100 case ELFCLASSNONE: 1101 errx(1, "invalid class"); 1102 } 1103 1104 return val; 1105 } 1106 1107 void 1108 usage(void) 1109 { 1110 fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n"); 1111 exit(1); 1112 } 1113