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 62enum 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 84typedef enum elf_member elf_member_t; 85 86static 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 127static 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 */ 169static const char * 170d_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 243static const char * 244e_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 269static const char *e_types[] = { 270 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE" 271}; 272 273static const char *ei_versions[] = { 274 "EV_NONE", "EV_CURRENT" 275}; 276 277static const char *ei_classes[] = { 278 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64" 279}; 280 281static const char *ei_data[] = { 282 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB" 283}; 284 285static 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 293static const char *p_types[] = { 294 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE", 295 "PT_SHLIB", "PT_PHDR", "PT_TLS" 296}; 297 298static 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 */ 304static const char * 305sh_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 342static 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 348static const char *st_types[] = { 349 "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE" 350}; 351 352static const char *st_bindings[] = { 353 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK" 354}; 355 356static char *dynstr; 357static char *shstrtab; 358static char *strtab; 359static FILE *out; 360 361static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member); 362static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, 363 elf_member_t member); 364#if 0 365static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member); 366#endif 367static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member); 368static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member); 369 370static void elf_print_ehdr(Elf32_Ehdr *e); 371static void elf_print_phdr(Elf32_Ehdr *e, void *p); 372static void elf_print_shdr(Elf32_Ehdr *e, void *sh); 373static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str); 374static void elf_print_dynamic(Elf32_Ehdr *e, void *sh); 375static void elf_print_rel(Elf32_Ehdr *e, void *r); 376static void elf_print_rela(Elf32_Ehdr *e, void *ra); 377static void elf_print_interp(Elf32_Ehdr *e, void *p); 378static void elf_print_got(Elf32_Ehdr *e, void *sh); 379static void elf_print_hash(Elf32_Ehdr *e, void *sh); 380static void elf_print_note(Elf32_Ehdr *e, void *sh); 381 382static void usage(void); 383 384int 385main(int ac, char **av) 386{ 387 u_int64_t phoff; 388 u_int64_t shoff; 389 u_int64_t phentsize; 390 u_int64_t phnum; 391 u_int64_t shentsize; 392 u_int64_t shnum; 393 u_int64_t shstrndx; 394 u_int64_t offset; 395 u_int64_t name; 396 u_int64_t type; 397 struct stat sb; 398 u_int flags; 399 Elf32_Ehdr *e; 400 void *p; 401 void *sh; 402 void *v; 403 int fd; 404 int ch; 405 int i; 406 407 out = stdout; 408 flags = 0; 409 while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1) 410 switch (ch) { 411 case 'a': 412 flags = ED_ALL; 413 break; 414 case 'c': 415 flags |= ED_SHDR; 416 break; 417 case 'd': 418 flags |= ED_DYN; 419 break; 420 case 'e': 421 flags |= ED_EHDR; 422 break; 423 case 'i': 424 flags |= ED_INTERP; 425 break; 426 case 'G': 427 flags |= ED_GOT; 428 break; 429 case 'h': 430 flags |= ED_HASH; 431 break; 432 case 'n': 433 flags |= ED_NOTE; 434 break; 435 case 'p': 436 flags |= ED_PHDR; 437 break; 438 case 'r': 439 flags |= ED_REL; 440 break; 441 case 's': 442 flags |= ED_SYMTAB; 443 break; 444 case 'w': 445 if ((out = fopen(optarg, "w")) == NULL) 446 err(1, "%s", optarg); 447 break; 448 case '?': 449 default: 450 usage(); 451 } 452 ac -= optind; 453 av += optind; 454 if (ac == 0 || flags == 0) 455 usage(); 456 if ((fd = open(*av, O_RDONLY)) < 0 || 457 fstat(fd, &sb) < 0) 458 err(1, "%s", *av); 459 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); 460 if (e == MAP_FAILED) 461 err(1, NULL); 462 if (!IS_ELF(*(Elf32_Ehdr *)e)) 463 errx(1, "not an elf file"); 464 phoff = elf_get_off(e, e, E_PHOFF); 465 shoff = elf_get_off(e, e, E_SHOFF); 466 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 467 phnum = elf_get_quarter(e, e, E_PHNUM); 468 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 469 shnum = elf_get_quarter(e, e, E_SHNUM); 470 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 471 p = (char *)e + phoff; 472 sh = (char *)e + shoff; 473 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize, SH_OFFSET); 474 shstrtab = (char *)e + offset; 475 for (i = 0; (u_int64_t)i < shnum; i++) { 476 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME); 477 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET); 478 if (strcmp(shstrtab + name, ".strtab") == 0) 479 strtab = (char *)e + offset; 480 if (strcmp(shstrtab + name, ".dynstr") == 0) 481 dynstr = (char *)e + offset; 482 } 483 if (flags & ED_EHDR) 484 elf_print_ehdr(e); 485 if (flags & ED_PHDR) 486 elf_print_phdr(e, p); 487 if (flags & ED_SHDR) 488 elf_print_shdr(e, sh); 489 for (i = 0; (u_int64_t)i < phnum; i++) { 490 v = (char *)p + i * phentsize; 491 type = elf_get_word(e, v, P_TYPE); 492 switch (type) { 493 case PT_INTERP: 494 if (flags & ED_INTERP) 495 elf_print_interp(e, v); 496 break; 497 case PT_NULL: 498 case PT_LOAD: 499 case PT_DYNAMIC: 500 case PT_NOTE: 501 case PT_SHLIB: 502 case PT_PHDR: 503 break; 504 } 505 } 506 for (i = 0; (u_int64_t)i < shnum; i++) { 507 v = (char *)sh + i * shentsize; 508 type = elf_get_word(e, v, SH_TYPE); 509 switch (type) { 510 case SHT_SYMTAB: 511 if (flags & ED_SYMTAB) 512 elf_print_symtab(e, v, strtab); 513 break; 514 case SHT_DYNAMIC: 515 if (flags & ED_DYN) 516 elf_print_dynamic(e, v); 517 break; 518 case SHT_RELA: 519 if (flags & ED_REL) 520 elf_print_rela(e, v); 521 break; 522 case SHT_REL: 523 if (flags & ED_REL) 524 elf_print_rel(e, v); 525 break; 526 case SHT_NOTE: 527 name = elf_get_word(e, v, SH_NAME); 528 if (flags & ED_NOTE && 529 strcmp(shstrtab + name, ".note.ABI-tag") == 0) 530 elf_print_note(e, v); 531 break; 532 case SHT_DYNSYM: 533 if (flags & ED_SYMTAB) 534 elf_print_symtab(e, v, dynstr); 535 break; 536 case SHT_PROGBITS: 537 name = elf_get_word(e, v, SH_NAME); 538 if (flags & ED_GOT && 539 strcmp(shstrtab + name, ".got") == 0) 540 elf_print_got(e, v); 541 break; 542 case SHT_HASH: 543 if (flags & ED_HASH) 544 elf_print_hash(e, v); 545 break; 546 case SHT_NULL: 547 case SHT_STRTAB: 548 case SHT_NOBITS: 549 case SHT_SHLIB: 550 break; 551 } 552 } 553 554 return 0; 555} 556 557static void 558elf_print_ehdr(Elf32_Ehdr *e) 559{ 560 u_int64_t class; 561 u_int64_t data; 562 u_int64_t osabi; 563 u_int64_t type; 564 u_int64_t machine; 565 u_int64_t version; 566 u_int64_t entry; 567 u_int64_t phoff; 568 u_int64_t shoff; 569 u_int64_t flags; 570 u_int64_t ehsize; 571 u_int64_t phentsize; 572 u_int64_t phnum; 573 u_int64_t shentsize; 574 u_int64_t shnum; 575 u_int64_t shstrndx; 576 577 class = elf_get_byte(e, e, E_CLASS); 578 data = elf_get_byte(e, e, E_DATA); 579 osabi = elf_get_byte(e, e, E_OSABI); 580 type = elf_get_quarter(e, e, E_TYPE); 581 machine = elf_get_quarter(e, e, E_MACHINE); 582 version = elf_get_word(e, e, E_VERSION); 583 entry = elf_get_addr(e, e, E_ENTRY); 584 phoff = elf_get_off(e, e, E_PHOFF); 585 shoff = elf_get_off(e, e, E_SHOFF); 586 flags = elf_get_word(e, e, E_FLAGS); 587 ehsize = elf_get_quarter(e, e, E_EHSIZE); 588 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 589 phnum = elf_get_quarter(e, e, E_PHNUM); 590 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 591 shnum = elf_get_quarter(e, e, E_SHNUM); 592 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 593 fprintf(out, "\nelf header:\n"); 594 fprintf(out, "\n"); 595 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data], 596 ei_abis[osabi]); 597 fprintf(out, "\te_type: %s\n", e_types[type]); 598 fprintf(out, "\te_machine: %s\n", e_machines(machine)); 599 fprintf(out, "\te_version: %s\n", ei_versions[version]); 600 fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry); 601 fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff); 602 fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff); 603 fprintf(out, "\te_flags: %jd\n", (intmax_t)flags); 604 fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize); 605 fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize); 606 fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum); 607 fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize); 608 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum); 609 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx); 610} 611 612static void 613elf_print_phdr(Elf32_Ehdr *e, void *p) 614{ 615 u_int64_t phentsize; 616 u_int64_t phnum; 617 u_int64_t type; 618 u_int64_t offset; 619 u_int64_t vaddr; 620 u_int64_t paddr; 621 u_int64_t filesz; 622 u_int64_t memsz; 623 u_int64_t flags; 624 u_int64_t align; 625 void *v; 626 int i; 627 628 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 629 phnum = elf_get_quarter(e, e, E_PHNUM); 630 fprintf(out, "\nprogram header:\n"); 631 for (i = 0; (u_int64_t)i < phnum; i++) { 632 v = (char *)p + i * phentsize; 633 type = elf_get_word(e, v, P_TYPE); 634 offset = elf_get_off(e, v, P_OFFSET); 635 vaddr = elf_get_addr(e, v, P_VADDR); 636 paddr = elf_get_addr(e, v, P_PADDR); 637 filesz = elf_get_size(e, v, P_FILESZ); 638 memsz = elf_get_size(e, v, P_MEMSZ); 639 flags = elf_get_word(e, v, P_FLAGS); 640 align = elf_get_size(e, v, P_ALIGN); 641 fprintf(out, "\n"); 642 fprintf(out, "entry: %d\n", i); 643 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]); 644 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset); 645 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr); 646 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr); 647 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz); 648 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz); 649 fprintf(out, "\tp_flags: %s\n", p_flags[flags]); 650 fprintf(out, "\tp_align: %jd\n", (intmax_t)align); 651 } 652} 653 654static void 655elf_print_shdr(Elf32_Ehdr *e, void *sh) 656{ 657 u_int64_t shentsize; 658 u_int64_t shnum; 659 u_int64_t name; 660 u_int64_t type; 661 u_int64_t flags; 662 u_int64_t addr; 663 u_int64_t offset; 664 u_int64_t size; 665 u_int64_t shlink; 666 u_int64_t info; 667 u_int64_t addralign; 668 u_int64_t entsize; 669 void *v; 670 int i; 671 672 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 673 shnum = elf_get_quarter(e, e, E_SHNUM); 674 fprintf(out, "\nsection header:\n"); 675 for (i = 0; (u_int64_t)i < shnum; i++) { 676 v = (char *)sh + i * shentsize; 677 name = elf_get_word(e, v, SH_NAME); 678 type = elf_get_word(e, v, SH_TYPE); 679 flags = elf_get_word(e, v, SH_FLAGS); 680 addr = elf_get_addr(e, v, SH_ADDR); 681 offset = elf_get_off(e, v, SH_OFFSET); 682 size = elf_get_size(e, v, SH_SIZE); 683 shlink = elf_get_word(e, v, SH_LINK); 684 info = elf_get_word(e, v, SH_INFO); 685 addralign = elf_get_size(e, v, SH_ADDRALIGN); 686 entsize = elf_get_size(e, v, SH_ENTSIZE); 687 fprintf(out, "\n"); 688 fprintf(out, "entry: %d\n", i); 689 fprintf(out, "\tsh_name: %s\n", shstrtab + name); 690 fprintf(out, "\tsh_type: %s\n", sh_types(type)); 691 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]); 692 fprintf(out, "\tsh_addr: %#jx\n", addr); 693 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset); 694 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size); 695 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink); 696 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info); 697 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign); 698 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize); 699 } 700} 701 702static void 703elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str) 704{ 705 u_int64_t offset; 706 u_int64_t entsize; 707 u_int64_t size; 708 u_int64_t name; 709 u_int64_t value; 710 u_int64_t info; 711 u_int64_t shndx; 712 void *st; 713 int len; 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 len = size / entsize; 721 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name); 722 for (i = 0; i < len; i++) { 723 st = (char *)e + offset + i * entsize; 724 name = elf_get_word(e, st, ST_NAME); 725 value = elf_get_addr(e, st, ST_VALUE); 726 size = elf_get_size(e, st, ST_SIZE); 727 info = elf_get_byte(e, st, ST_INFO); 728 shndx = elf_get_quarter(e, st, ST_SHNDX); 729 fprintf(out, "\n"); 730 fprintf(out, "entry: %d\n", i); 731 fprintf(out, "\tst_name: %s\n", str + name); 732 fprintf(out, "\tst_value: %#jx\n", value); 733 fprintf(out, "\tst_size: %jd\n", (intmax_t)size); 734 fprintf(out, "\tst_info: %s %s\n", 735 st_types[ELF32_ST_TYPE(info)], 736 st_bindings[ELF32_ST_BIND(info)]); 737 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx); 738 } 739} 740 741static void 742elf_print_dynamic(Elf32_Ehdr *e, void *sh) 743{ 744 u_int64_t offset; 745 u_int64_t entsize; 746 u_int64_t size; 747 int64_t tag; 748 u_int64_t ptr; 749 u_int64_t val; 750 void *d; 751 int i; 752 753 offset = elf_get_off(e, sh, SH_OFFSET); 754 entsize = elf_get_size(e, sh, SH_ENTSIZE); 755 size = elf_get_size(e, sh, SH_SIZE); 756 fprintf(out, "\ndynamic:\n"); 757 for (i = 0; (u_int64_t)i < size / entsize; i++) { 758 d = (char *)e + offset + i * entsize; 759 tag = elf_get_size(e, d, D_TAG); 760 ptr = elf_get_size(e, d, D_PTR); 761 val = elf_get_addr(e, d, D_VAL); 762 fprintf(out, "\n"); 763 fprintf(out, "entry: %d\n", i); 764 fprintf(out, "\td_tag: %s\n", d_tags(tag)); 765 switch (tag) { 766 case DT_NEEDED: 767 case DT_SONAME: 768 case DT_RPATH: 769 fprintf(out, "\td_val: %s\n", dynstr + val); 770 break; 771 case DT_PLTRELSZ: 772 case DT_RELA: 773 case DT_RELASZ: 774 case DT_RELAENT: 775 case DT_STRSZ: 776 case DT_SYMENT: 777 case DT_RELSZ: 778 case DT_RELENT: 779 case DT_PLTREL: 780 fprintf(out, "\td_val: %jd\n", (intmax_t)val); 781 break; 782 case DT_PLTGOT: 783 case DT_HASH: 784 case DT_STRTAB: 785 case DT_SYMTAB: 786 case DT_INIT: 787 case DT_FINI: 788 case DT_REL: 789 case DT_JMPREL: 790 fprintf(out, "\td_ptr: %#jx\n", ptr); 791 break; 792 case DT_NULL: 793 case DT_SYMBOLIC: 794 case DT_DEBUG: 795 case DT_TEXTREL: 796 break; 797 } 798 } 799} 800 801static void 802elf_print_rela(Elf32_Ehdr *e, void *sh) 803{ 804 u_int64_t offset; 805 u_int64_t entsize; 806 u_int64_t size; 807 u_int64_t name; 808 u_int64_t info; 809 int64_t addend; 810 void *ra; 811 void *v; 812 int i; 813 814 offset = elf_get_off(e, sh, SH_OFFSET); 815 entsize = elf_get_size(e, sh, SH_ENTSIZE); 816 size = elf_get_size(e, sh, SH_SIZE); 817 name = elf_get_word(e, sh, SH_NAME); 818 v = (char *)e + offset; 819 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name); 820 for (i = 0; (u_int64_t)i < size / entsize; i++) { 821 ra = (char *)v + i * entsize; 822 offset = elf_get_addr(e, ra, RA_OFFSET); 823 info = elf_get_word(e, ra, RA_INFO); 824 addend = elf_get_off(e, ra, RA_ADDEND); 825 fprintf(out, "\n"); 826 fprintf(out, "entry: %d\n", i); 827 fprintf(out, "\tr_offset: %#jx\n", offset); 828 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 829 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend); 830 } 831} 832 833static void 834elf_print_rel(Elf32_Ehdr *e, void *sh) 835{ 836 u_int64_t offset; 837 u_int64_t entsize; 838 u_int64_t size; 839 u_int64_t name; 840 u_int64_t info; 841 void *r; 842 void *v; 843 int i; 844 845 offset = elf_get_off(e, sh, SH_OFFSET); 846 entsize = elf_get_size(e, sh, SH_ENTSIZE); 847 size = elf_get_size(e, sh, SH_SIZE); 848 name = elf_get_word(e, sh, SH_NAME); 849 v = (char *)e + offset; 850 fprintf(out, "\nrelocation (%s):\n", shstrtab + name); 851 for (i = 0; (u_int64_t)i < size / entsize; i++) { 852 r = (char *)v + i * entsize; 853 offset = elf_get_addr(e, r, R_OFFSET); 854 info = elf_get_word(e, r, R_INFO); 855 fprintf(out, "\n"); 856 fprintf(out, "entry: %d\n", i); 857 fprintf(out, "\tr_offset: %#jx\n", offset); 858 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 859 } 860} 861 862static void 863elf_print_interp(Elf32_Ehdr *e, void *p) 864{ 865 u_int64_t offset; 866 char *s; 867 868 offset = elf_get_off(e, p, P_OFFSET); 869 s = (char *)e + offset; 870 fprintf(out, "\ninterp:\n"); 871 fprintf(out, "\t%s\n", s); 872} 873 874static void 875elf_print_got(Elf32_Ehdr *e, void *sh) 876{ 877 u_int64_t offset; 878 u_int64_t addralign; 879 u_int64_t size; 880 u_int64_t addr; 881 void *v; 882 int i; 883 884 offset = elf_get_off(e, sh, SH_OFFSET); 885 addralign = elf_get_size(e, sh, SH_ADDRALIGN); 886 size = elf_get_size(e, sh, SH_SIZE); 887 v = (char *)e + offset; 888 fprintf(out, "\nglobal offset table:\n"); 889 for (i = 0; (u_int64_t)i < size / addralign; i++) { 890 addr = elf_get_addr(e, (char *)v + i * addralign, 0); 891 fprintf(out, "\n"); 892 fprintf(out, "entry: %d\n", i); 893 fprintf(out, "\t%#jx\n", addr); 894 } 895} 896 897static void 898elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused) 899{ 900} 901 902static void 903elf_print_note(Elf32_Ehdr *e, void *sh) 904{ 905 u_int64_t offset; 906 u_int64_t size; 907 u_int64_t name; 908 u_int32_t namesz; 909 u_int32_t descsz; 910 u_int32_t desc; 911 char *n, *s; 912 913 offset = elf_get_off(e, sh, SH_OFFSET); 914 size = elf_get_size(e, sh, SH_SIZE); 915 name = elf_get_word(e, sh, SH_NAME); 916 n = (char *)e + offset; 917 fprintf(out, "\nnote (%s):\n", shstrtab + name); 918 while (n < ((char *)e + offset + size)) { 919 namesz = elf_get_word(e, n, N_NAMESZ); 920 descsz = elf_get_word(e, n, N_DESCSZ); 921 s = n + sizeof(Elf_Note); 922 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0); 923 fprintf(out, "\t%s %d\n", s, desc); 924 n += sizeof(Elf_Note) + namesz + descsz; 925 } 926} 927 928static u_int64_t 929elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member) 930{ 931 u_int64_t val; 932 933 val = 0; 934 switch (e->e_ident[EI_CLASS]) { 935 case ELFCLASS32: 936 val = ((uint8_t *)base)[elf32_offsets[member]]; 937 break; 938 case ELFCLASS64: 939 val = ((uint8_t *)base)[elf64_offsets[member]]; 940 break; 941 case ELFCLASSNONE: 942 errx(1, "invalid class"); 943 } 944 945 return val; 946} 947 948static u_int64_t 949elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member) 950{ 951 u_int64_t val; 952 953 val = 0; 954 switch (e->e_ident[EI_CLASS]) { 955 case ELFCLASS32: 956 base = (char *)base + elf32_offsets[member]; 957 switch (e->e_ident[EI_DATA]) { 958 case ELFDATA2MSB: 959 val = be16dec(base); 960 break; 961 case ELFDATA2LSB: 962 val = le16dec(base); 963 break; 964 case ELFDATANONE: 965 errx(1, "invalid data format"); 966 } 967 break; 968 case ELFCLASS64: 969 base = (char *)base + elf64_offsets[member]; 970 switch (e->e_ident[EI_DATA]) { 971 case ELFDATA2MSB: 972 val = be16dec(base); 973 break; 974 case ELFDATA2LSB: 975 val = le16dec(base); 976 break; 977 case ELFDATANONE: 978 errx(1, "invalid data format"); 979 } 980 break; 981 case ELFCLASSNONE: 982 errx(1, "invalid class"); 983 } 984 985 return val; 986} 987 988#if 0 989static u_int64_t 990elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member) 991{ 992 u_int64_t val; 993 994 val = 0; 995 switch (e->e_ident[EI_CLASS]) { 996 case ELFCLASS32: 997 base = (char *)base + elf32_offsets[member]; 998 switch (e->e_ident[EI_DATA]) { 999 case ELFDATA2MSB: 1000 val = be16dec(base); 1001 break; 1002 case ELFDATA2LSB: 1003 val = le16dec(base); 1004 break; 1005 case ELFDATANONE: 1006 errx(1, "invalid data format"); 1007 } 1008 break; 1009 case ELFCLASS64: 1010 base = (char *)base + elf64_offsets[member]; 1011 switch (e->e_ident[EI_DATA]) { 1012 case ELFDATA2MSB: 1013 val = be32dec(base); 1014 break; 1015 case ELFDATA2LSB: 1016 val = le32dec(base); 1017 break; 1018 case ELFDATANONE: 1019 errx(1, "invalid data format"); 1020 } 1021 break; 1022 case ELFCLASSNONE: 1023 errx(1, "invalid class"); 1024 } 1025 1026 return val; 1027} 1028#endif 1029 1030static u_int64_t 1031elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member) 1032{ 1033 u_int64_t val; 1034 1035 val = 0; 1036 switch (e->e_ident[EI_CLASS]) { 1037 case ELFCLASS32: 1038 base = (char *)base + elf32_offsets[member]; 1039 switch (e->e_ident[EI_DATA]) { 1040 case ELFDATA2MSB: 1041 val = be32dec(base); 1042 break; 1043 case ELFDATA2LSB: 1044 val = le32dec(base); 1045 break; 1046 case ELFDATANONE: 1047 errx(1, "invalid data format"); 1048 } 1049 break; 1050 case ELFCLASS64: 1051 base = (char *)base + elf64_offsets[member]; 1052 switch (e->e_ident[EI_DATA]) { 1053 case ELFDATA2MSB: 1054 val = be32dec(base); 1055 break; 1056 case ELFDATA2LSB: 1057 val = le32dec(base); 1058 break; 1059 case ELFDATANONE: 1060 errx(1, "invalid data format"); 1061 } 1062 break; 1063 case ELFCLASSNONE: 1064 errx(1, "invalid class"); 1065 } 1066 1067 return val; 1068} 1069 1070static u_int64_t 1071elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member) 1072{ 1073 u_int64_t val; 1074 1075 val = 0; 1076 switch (e->e_ident[EI_CLASS]) { 1077 case ELFCLASS32: 1078 base = (char *)base + elf32_offsets[member]; 1079 switch (e->e_ident[EI_DATA]) { 1080 case ELFDATA2MSB: 1081 val = be32dec(base); 1082 break; 1083 case ELFDATA2LSB: 1084 val = le32dec(base); 1085 break; 1086 case ELFDATANONE: 1087 errx(1, "invalid data format"); 1088 } 1089 break; 1090 case ELFCLASS64: 1091 base = (char *)base + elf64_offsets[member]; 1092 switch (e->e_ident[EI_DATA]) { 1093 case ELFDATA2MSB: 1094 val = be64dec(base); 1095 break; 1096 case ELFDATA2LSB: 1097 val = le64dec(base); 1098 break; 1099 case ELFDATANONE: 1100 errx(1, "invalid data format"); 1101 } 1102 break; 1103 case ELFCLASSNONE: 1104 errx(1, "invalid class"); 1105 } 1106 1107 return val; 1108} 1109 1110static void 1111usage(void) 1112{ 1113 fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n"); 1114 exit(1); 1115} 1116