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 static 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 static 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 { 172 static char unknown_tag[48]; 173 174 switch (tag) { 175 case 0: return "DT_NULL"; 176 case 1: return "DT_NEEDED"; 177 case 2: return "DT_PLTRELSZ"; 178 case 3: return "DT_PLTGOT"; 179 case 4: return "DT_HASH"; 180 case 5: return "DT_STRTAB"; 181 case 6: return "DT_SYMTAB"; 182 case 7: return "DT_RELA"; 183 case 8: return "DT_RELASZ"; 184 case 9: return "DT_RELAENT"; 185 case 10: return "DT_STRSZ"; 186 case 11: return "DT_SYMENT"; 187 case 12: return "DT_INIT"; 188 case 13: return "DT_FINI"; 189 case 14: return "DT_SONAME"; 190 case 15: return "DT_RPATH"; 191 case 16: return "DT_SYMBOLIC"; 192 case 17: return "DT_REL"; 193 case 18: return "DT_RELSZ"; 194 case 19: return "DT_RELENT"; 195 case 20: return "DT_PLTREL"; 196 case 21: return "DT_DEBUG"; 197 case 22: return "DT_TEXTREL"; 198 case 23: return "DT_JMPREL"; 199 case 24: return "DT_BIND_NOW"; 200 case 25: return "DT_INIT_ARRAY"; 201 case 26: return "DT_FINI_ARRAY"; 202 case 27: return "DT_INIT_ARRAYSZ"; 203 case 28: return "DT_FINI_ARRAYSZ"; 204 case 29: return "DT_RUNPATH"; 205 case 30: return "DT_FLAGS"; 206 case 32: return "DT_PREINIT_ARRAY"; /* XXX: DT_ENCODING */ 207 case 33: return "DT_PREINIT_ARRAYSZ"; 208 /* 0x6000000D - 0x6ffff000 operating system-specific semantics */ 209 case 0x6ffffdf5: return "DT_GNU_PRELINKED"; 210 case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ"; 211 case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ"; 212 case 0x6ffffdf8: return "DT_SUNW_CHECKSUM"; 213 case 0x6ffffdf9: return "DT_PLTPADSZ"; 214 case 0x6ffffdfa: return "DT_MOVEENT"; 215 case 0x6ffffdfb: return "DT_MOVESZ"; 216 case 0x6ffffdfc: return "DT_FEATURE"; 217 case 0x6ffffdfd: return "DT_POSFLAG_1"; 218 case 0x6ffffdfe: return "DT_SYMINSZ"; 219 case 0x6ffffdff: return "DT_SYMINENT (DT_VALRNGHI)"; 220 case 0x6ffffe00: return "DT_ADDRRNGLO"; 221 case 0x6ffffef5: return "DT_GNU_HASH"; 222 case 0x6ffffef8: return "DT_GNU_CONFLICT"; 223 case 0x6ffffef9: return "DT_GNU_LIBLIST"; 224 case 0x6ffffefa: return "DT_SUNW_CONFIG"; 225 case 0x6ffffefb: return "DT_SUNW_DEPAUDIT"; 226 case 0x6ffffefc: return "DT_SUNW_AUDIT"; 227 case 0x6ffffefd: return "DT_SUNW_PLTPAD"; 228 case 0x6ffffefe: return "DT_SUNW_MOVETAB"; 229 case 0x6ffffeff: return "DT_SYMINFO (DT_ADDRRNGHI)"; 230 case 0x6ffffff9: return "DT_RELACOUNT"; 231 case 0x6ffffffa: return "DT_RELCOUNT"; 232 case 0x6ffffffb: return "DT_FLAGS_1"; 233 case 0x6ffffffc: return "DT_VERDEF"; 234 case 0x6ffffffd: return "DT_VERDEFNUM"; 235 case 0x6ffffffe: return "DT_VERNEED"; 236 case 0x6fffffff: return "DT_VERNEEDNUM"; 237 case 0x6ffffff0: return "DT_GNU_VERSYM"; 238 /* 0x70000000 - 0x7fffffff processor-specific semantics */ 239 case 0x70000000: return "DT_IA_64_PLT_RESERVE"; 240 case 0x7ffffffd: return "DT_SUNW_AUXILIARY"; 241 case 0x7ffffffe: return "DT_SUNW_USED"; 242 case 0x7fffffff: return "DT_SUNW_FILTER"; 243 } 244 snprintf(unknown_tag, sizeof(unknown_tag), 245 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag); 246 return (unknown_tag); 247 } 248 249 static const char * 250 e_machines(u_int mach) 251 { 252 static char machdesc[64]; 253 254 switch (mach) { 255 case EM_NONE: return "EM_NONE"; 256 case EM_M32: return "EM_M32"; 257 case EM_SPARC: return "EM_SPARC"; 258 case EM_386: return "EM_386"; 259 case EM_68K: return "EM_68K"; 260 case EM_88K: return "EM_88K"; 261 case EM_860: return "EM_860"; 262 case EM_MIPS: return "EM_MIPS"; 263 case EM_PPC: return "EM_PPC"; 264 case EM_PPC64: return "EM_PPC64"; 265 case EM_ARM: return "EM_ARM"; 266 case EM_ALPHA: return "EM_ALPHA (legacy)"; 267 case EM_SPARCV9:return "EM_SPARCV9"; 268 case EM_IA_64: return "EM_IA_64"; 269 case EM_X86_64: return "EM_X86_64"; 270 } 271 snprintf(machdesc, sizeof(machdesc), 272 "(unknown machine) -- type 0x%x", mach); 273 return (machdesc); 274 } 275 276 static const char *e_types[] = { 277 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE" 278 }; 279 280 static const char *ei_versions[] = { 281 "EV_NONE", "EV_CURRENT" 282 }; 283 284 static const char *ei_classes[] = { 285 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64" 286 }; 287 288 static const char *ei_data[] = { 289 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB" 290 }; 291 292 static const char *ei_abis[256] = { 293 "ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX", 294 "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX", 295 "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64", 296 "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD", 297 [255] = "ELFOSABI_STANDALONE" 298 }; 299 300 static const char *p_types[] = { 301 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE", 302 "PT_SHLIB", "PT_PHDR", "PT_TLS" 303 }; 304 305 static const char *p_flags[] = { 306 "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R", 307 "PF_X|PF_W|PF_R" 308 }; 309 310 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */ 311 static const char * 312 sh_types(uint64_t machine, uint64_t sht) { 313 static char unknown_buf[64]; 314 315 if (sht < 0x60000000) { 316 switch (sht) { 317 case 0: return "SHT_NULL"; 318 case 1: return "SHT_PROGBITS"; 319 case 2: return "SHT_SYMTAB"; 320 case 3: return "SHT_STRTAB"; 321 case 4: return "SHT_RELA"; 322 case 5: return "SHT_HASH"; 323 case 6: return "SHT_DYNAMIC"; 324 case 7: return "SHT_NOTE"; 325 case 8: return "SHT_NOBITS"; 326 case 9: return "SHT_REL"; 327 case 10: return "SHT_SHLIB"; 328 case 11: return "SHT_DYNSYM"; 329 case 14: return "SHT_INIT_ARRAY"; 330 case 15: return "SHT_FINI_ARRAY"; 331 case 16: return "SHT_PREINIT_ARRAY"; 332 case 17: return "SHT_GROUP"; 333 case 18: return "SHT_SYMTAB_SHNDX"; 334 } 335 snprintf(unknown_buf, sizeof(unknown_buf), 336 "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht); 337 return (unknown_buf); 338 } else if (sht < 0x70000000) { 339 /* 0x60000000-0x6fffffff operating system-specific semantics */ 340 switch (sht) { 341 case 0x6ffffff0: return "XXX:VERSYM"; 342 case 0x6ffffff4: return "SHT_SUNW_dof"; 343 case 0x6ffffff6: return "SHT_GNU_HASH"; 344 case 0x6ffffff7: return "SHT_GNU_LIBLIST"; 345 case 0x6ffffffc: return "XXX:VERDEF"; 346 case 0x6ffffffd: return "SHT_SUNW(GNU)_verdef"; 347 case 0x6ffffffe: return "SHT_SUNW(GNU)_verneed"; 348 case 0x6fffffff: return "SHT_SUNW(GNU)_versym"; 349 } 350 snprintf(unknown_buf, sizeof(unknown_buf), 351 "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED", 352 (uintmax_t)sht); 353 return (unknown_buf); 354 } else if (sht < 0x80000000) { 355 /* 0x70000000-0x7fffffff processor-specific semantics */ 356 switch (machine) { 357 case EM_ARM: 358 switch (sht) { 359 case 0x70000001: return "SHT_ARM_EXIDX"; 360 case 0x70000002: return "SHT_ARM_PREEMPTMAP"; 361 case 0x70000003: return "SHT_ARM_ATTRIBUTES"; 362 case 0x70000004: return "SHT_ARM_DEBUGOVERLAY"; 363 case 0x70000005: return "SHT_ARM_OVERLAYSECTION"; 364 } 365 break; 366 case EM_MIPS: 367 switch (sht) { 368 case 0x7000000d: return "SHT_MIPS_OPTIONS"; 369 } 370 break; 371 case EM_IA_64: 372 switch (sht) { 373 case 0x70000000: return "SHT_IA_64_EXT"; 374 case 0x70000001: return "SHT_IA_64_UNWIND"; 375 } 376 break; 377 } 378 switch (sht) { 379 case 0x7ffffffd: return "XXX:AUXILIARY"; 380 case 0x7fffffff: return "XXX:FILTER"; 381 } 382 snprintf(unknown_buf, sizeof(unknown_buf), 383 "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED", 384 (uintmax_t)sht); 385 return (unknown_buf); 386 } else { 387 /* 0x80000000-0xffffffff application programs */ 388 snprintf(unknown_buf, sizeof(unknown_buf), 389 "ERROR: SHT 0x%jx NOT DEFINED", 390 (uintmax_t)sht); 391 return (unknown_buf); 392 } 393 } 394 395 static const char *sh_flags[] = { 396 "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR", 397 "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR", 398 "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR" 399 }; 400 401 static const char *st_types[] = { 402 "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE" 403 }; 404 405 static const char *st_bindings[] = { 406 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK" 407 }; 408 409 static char *dynstr; 410 static char *shstrtab; 411 static char *strtab; 412 static FILE *out; 413 414 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member); 415 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, 416 elf_member_t member); 417 #if 0 418 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member); 419 #endif 420 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member); 421 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member); 422 423 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh); 424 static void elf_print_phdr(Elf32_Ehdr *e, void *p); 425 static void elf_print_shdr(Elf32_Ehdr *e, void *sh); 426 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str); 427 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh); 428 static void elf_print_rel(Elf32_Ehdr *e, void *r); 429 static void elf_print_rela(Elf32_Ehdr *e, void *ra); 430 static void elf_print_interp(Elf32_Ehdr *e, void *p); 431 static void elf_print_got(Elf32_Ehdr *e, void *sh); 432 static void elf_print_hash(Elf32_Ehdr *e, void *sh); 433 static void elf_print_note(Elf32_Ehdr *e, void *sh); 434 435 static void usage(void); 436 437 /* 438 * Helpers for ELF files with shnum or shstrndx values that don't fit in the 439 * ELF header. If the values are too large then an escape value is used to 440 * indicate that the actual value is found in one of section 0's fields. 441 */ 442 static uint64_t 443 elf_get_shnum(Elf32_Ehdr *e, void *sh) 444 { 445 uint64_t shnum; 446 447 shnum = elf_get_quarter(e, e, E_SHNUM); 448 if (shnum == 0) 449 shnum = elf_get_word(e, (char *)sh, SH_SIZE); 450 return shnum; 451 } 452 453 static uint64_t 454 elf_get_shstrndx(Elf32_Ehdr *e, void *sh) 455 { 456 uint64_t shstrndx; 457 458 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 459 if (shstrndx == SHN_XINDEX) 460 shstrndx = elf_get_word(e, (char *)sh, SH_LINK); 461 return shstrndx; 462 } 463 464 int 465 main(int ac, char **av) 466 { 467 u_int64_t phoff; 468 u_int64_t shoff; 469 u_int64_t phentsize; 470 u_int64_t phnum; 471 u_int64_t shentsize; 472 u_int64_t shnum; 473 u_int64_t shstrndx; 474 u_int64_t offset; 475 u_int64_t name; 476 u_int64_t type; 477 struct stat sb; 478 u_int flags; 479 Elf32_Ehdr *e; 480 void *p; 481 void *sh; 482 void *v; 483 int fd; 484 int ch; 485 int i; 486 487 out = stdout; 488 flags = 0; 489 while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1) 490 switch (ch) { 491 case 'a': 492 flags = ED_ALL; 493 break; 494 case 'c': 495 flags |= ED_SHDR; 496 break; 497 case 'd': 498 flags |= ED_DYN; 499 break; 500 case 'e': 501 flags |= ED_EHDR; 502 break; 503 case 'i': 504 flags |= ED_INTERP; 505 break; 506 case 'G': 507 flags |= ED_GOT; 508 break; 509 case 'h': 510 flags |= ED_HASH; 511 break; 512 case 'n': 513 flags |= ED_NOTE; 514 break; 515 case 'p': 516 flags |= ED_PHDR; 517 break; 518 case 'r': 519 flags |= ED_REL; 520 break; 521 case 's': 522 flags |= ED_SYMTAB; 523 break; 524 case 'w': 525 if ((out = fopen(optarg, "w")) == NULL) 526 err(1, "%s", optarg); 527 break; 528 case '?': 529 default: 530 usage(); 531 } 532 ac -= optind; 533 av += optind; 534 if (ac == 0 || flags == 0) 535 usage(); 536 if ((fd = open(*av, O_RDONLY)) < 0 || 537 fstat(fd, &sb) < 0) 538 err(1, "%s", *av); 539 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); 540 if (e == MAP_FAILED) 541 err(1, NULL); 542 if (!IS_ELF(*(Elf32_Ehdr *)e)) 543 errx(1, "not an elf file"); 544 phoff = elf_get_off(e, e, E_PHOFF); 545 shoff = elf_get_off(e, e, E_SHOFF); 546 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 547 phnum = elf_get_quarter(e, e, E_PHNUM); 548 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 549 p = (char *)e + phoff; 550 if (shoff > 0) { 551 sh = (char *)e + shoff; 552 shnum = elf_get_shnum(e, sh); 553 shstrndx = elf_get_shstrndx(e, sh); 554 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize, 555 SH_OFFSET); 556 shstrtab = (char *)e + offset; 557 } else { 558 sh = NULL; 559 shnum = 0; 560 shstrndx = 0; 561 shstrtab = NULL; 562 } 563 for (i = 0; (u_int64_t)i < shnum; i++) { 564 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME); 565 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET); 566 if (strcmp(shstrtab + name, ".strtab") == 0) 567 strtab = (char *)e + offset; 568 if (strcmp(shstrtab + name, ".dynstr") == 0) 569 dynstr = (char *)e + offset; 570 } 571 if (flags & ED_EHDR) 572 elf_print_ehdr(e, sh); 573 if (flags & ED_PHDR) 574 elf_print_phdr(e, p); 575 if (flags & ED_SHDR) 576 elf_print_shdr(e, sh); 577 for (i = 0; (u_int64_t)i < phnum; i++) { 578 v = (char *)p + i * phentsize; 579 type = elf_get_word(e, v, P_TYPE); 580 switch (type) { 581 case PT_INTERP: 582 if (flags & ED_INTERP) 583 elf_print_interp(e, v); 584 break; 585 case PT_NULL: 586 case PT_LOAD: 587 case PT_DYNAMIC: 588 case PT_NOTE: 589 case PT_SHLIB: 590 case PT_PHDR: 591 break; 592 } 593 } 594 for (i = 0; (u_int64_t)i < shnum; i++) { 595 v = (char *)sh + i * shentsize; 596 type = elf_get_word(e, v, SH_TYPE); 597 switch (type) { 598 case SHT_SYMTAB: 599 if (flags & ED_SYMTAB) 600 elf_print_symtab(e, v, strtab); 601 break; 602 case SHT_DYNAMIC: 603 if (flags & ED_DYN) 604 elf_print_dynamic(e, v); 605 break; 606 case SHT_RELA: 607 if (flags & ED_REL) 608 elf_print_rela(e, v); 609 break; 610 case SHT_REL: 611 if (flags & ED_REL) 612 elf_print_rel(e, v); 613 break; 614 case SHT_NOTE: 615 name = elf_get_word(e, v, SH_NAME); 616 if (flags & ED_NOTE && 617 strcmp(shstrtab + name, ".note.ABI-tag") == 0) 618 elf_print_note(e, v); 619 break; 620 case SHT_DYNSYM: 621 if (flags & ED_SYMTAB) 622 elf_print_symtab(e, v, dynstr); 623 break; 624 case SHT_PROGBITS: 625 name = elf_get_word(e, v, SH_NAME); 626 if (flags & ED_GOT && 627 strcmp(shstrtab + name, ".got") == 0) 628 elf_print_got(e, v); 629 break; 630 case SHT_HASH: 631 if (flags & ED_HASH) 632 elf_print_hash(e, v); 633 break; 634 case SHT_NULL: 635 case SHT_STRTAB: 636 case SHT_NOBITS: 637 case SHT_SHLIB: 638 break; 639 } 640 } 641 642 return 0; 643 } 644 645 static void 646 elf_print_ehdr(Elf32_Ehdr *e, void *sh) 647 { 648 u_int64_t class; 649 u_int64_t data; 650 u_int64_t osabi; 651 u_int64_t type; 652 u_int64_t machine; 653 u_int64_t version; 654 u_int64_t entry; 655 u_int64_t phoff; 656 u_int64_t shoff; 657 u_int64_t flags; 658 u_int64_t ehsize; 659 u_int64_t phentsize; 660 u_int64_t phnum; 661 u_int64_t shentsize; 662 u_int64_t shnum; 663 u_int64_t shstrndx; 664 665 class = elf_get_byte(e, e, E_CLASS); 666 data = elf_get_byte(e, e, E_DATA); 667 osabi = elf_get_byte(e, e, E_OSABI); 668 type = elf_get_quarter(e, e, E_TYPE); 669 machine = elf_get_quarter(e, e, E_MACHINE); 670 version = elf_get_word(e, e, E_VERSION); 671 entry = elf_get_addr(e, e, E_ENTRY); 672 phoff = elf_get_off(e, e, E_PHOFF); 673 shoff = elf_get_off(e, e, E_SHOFF); 674 flags = elf_get_word(e, e, E_FLAGS); 675 ehsize = elf_get_quarter(e, e, E_EHSIZE); 676 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 677 phnum = elf_get_quarter(e, e, E_PHNUM); 678 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 679 fprintf(out, "\nelf header:\n"); 680 fprintf(out, "\n"); 681 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data], 682 ei_abis[osabi]); 683 fprintf(out, "\te_type: %s\n", e_types[type]); 684 fprintf(out, "\te_machine: %s\n", e_machines(machine)); 685 fprintf(out, "\te_version: %s\n", ei_versions[version]); 686 fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry); 687 fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff); 688 fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff); 689 fprintf(out, "\te_flags: %jd\n", (intmax_t)flags); 690 fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize); 691 fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize); 692 fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum); 693 fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize); 694 if (sh != NULL) { 695 shnum = elf_get_shnum(e, sh); 696 shstrndx = elf_get_shstrndx(e, sh); 697 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum); 698 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx); 699 } 700 } 701 702 static void 703 elf_print_phdr(Elf32_Ehdr *e, void *p) 704 { 705 u_int64_t phentsize; 706 u_int64_t phnum; 707 u_int64_t type; 708 u_int64_t offset; 709 u_int64_t vaddr; 710 u_int64_t paddr; 711 u_int64_t filesz; 712 u_int64_t memsz; 713 u_int64_t flags; 714 u_int64_t align; 715 void *v; 716 int i; 717 718 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 719 phnum = elf_get_quarter(e, e, E_PHNUM); 720 fprintf(out, "\nprogram header:\n"); 721 for (i = 0; (u_int64_t)i < phnum; i++) { 722 v = (char *)p + i * phentsize; 723 type = elf_get_word(e, v, P_TYPE); 724 offset = elf_get_off(e, v, P_OFFSET); 725 vaddr = elf_get_addr(e, v, P_VADDR); 726 paddr = elf_get_addr(e, v, P_PADDR); 727 filesz = elf_get_size(e, v, P_FILESZ); 728 memsz = elf_get_size(e, v, P_MEMSZ); 729 flags = elf_get_word(e, v, P_FLAGS); 730 align = elf_get_size(e, v, P_ALIGN); 731 fprintf(out, "\n"); 732 fprintf(out, "entry: %d\n", i); 733 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]); 734 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset); 735 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr); 736 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr); 737 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz); 738 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz); 739 fprintf(out, "\tp_flags: %s\n", p_flags[flags]); 740 fprintf(out, "\tp_align: %jd\n", (intmax_t)align); 741 } 742 } 743 744 static void 745 elf_print_shdr(Elf32_Ehdr *e, void *sh) 746 { 747 u_int64_t shentsize; 748 u_int64_t shnum; 749 u_int64_t name; 750 u_int64_t type; 751 u_int64_t flags; 752 u_int64_t addr; 753 u_int64_t offset; 754 u_int64_t size; 755 u_int64_t shlink; 756 u_int64_t info; 757 u_int64_t addralign; 758 u_int64_t entsize; 759 u_int64_t machine; 760 void *v; 761 int i; 762 763 if (sh == NULL) { 764 fprintf(out, "\nNo section headers\n"); 765 return; 766 } 767 768 machine = elf_get_quarter(e, e, E_MACHINE); 769 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 770 shnum = elf_get_shnum(e, sh); 771 fprintf(out, "\nsection header:\n"); 772 for (i = 0; (u_int64_t)i < shnum; i++) { 773 v = (char *)sh + i * shentsize; 774 name = elf_get_word(e, v, SH_NAME); 775 type = elf_get_word(e, v, SH_TYPE); 776 flags = elf_get_word(e, v, SH_FLAGS); 777 addr = elf_get_addr(e, v, SH_ADDR); 778 offset = elf_get_off(e, v, SH_OFFSET); 779 size = elf_get_size(e, v, SH_SIZE); 780 shlink = elf_get_word(e, v, SH_LINK); 781 info = elf_get_word(e, v, SH_INFO); 782 addralign = elf_get_size(e, v, SH_ADDRALIGN); 783 entsize = elf_get_size(e, v, SH_ENTSIZE); 784 fprintf(out, "\n"); 785 fprintf(out, "entry: %d\n", i); 786 fprintf(out, "\tsh_name: %s\n", shstrtab + name); 787 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type)); 788 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]); 789 fprintf(out, "\tsh_addr: %#jx\n", addr); 790 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset); 791 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size); 792 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink); 793 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info); 794 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign); 795 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize); 796 } 797 } 798 799 static void 800 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str) 801 { 802 u_int64_t offset; 803 u_int64_t entsize; 804 u_int64_t size; 805 u_int64_t name; 806 u_int64_t value; 807 u_int64_t info; 808 u_int64_t shndx; 809 void *st; 810 int len; 811 int i; 812 813 offset = elf_get_off(e, sh, SH_OFFSET); 814 entsize = elf_get_size(e, sh, SH_ENTSIZE); 815 size = elf_get_size(e, sh, SH_SIZE); 816 name = elf_get_word(e, sh, SH_NAME); 817 len = size / entsize; 818 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name); 819 for (i = 0; i < len; i++) { 820 st = (char *)e + offset + i * entsize; 821 name = elf_get_word(e, st, ST_NAME); 822 value = elf_get_addr(e, st, ST_VALUE); 823 size = elf_get_size(e, st, ST_SIZE); 824 info = elf_get_byte(e, st, ST_INFO); 825 shndx = elf_get_quarter(e, st, ST_SHNDX); 826 fprintf(out, "\n"); 827 fprintf(out, "entry: %d\n", i); 828 fprintf(out, "\tst_name: %s\n", str + name); 829 fprintf(out, "\tst_value: %#jx\n", value); 830 fprintf(out, "\tst_size: %jd\n", (intmax_t)size); 831 fprintf(out, "\tst_info: %s %s\n", 832 st_types[ELF32_ST_TYPE(info)], 833 st_bindings[ELF32_ST_BIND(info)]); 834 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx); 835 } 836 } 837 838 static void 839 elf_print_dynamic(Elf32_Ehdr *e, void *sh) 840 { 841 u_int64_t offset; 842 u_int64_t entsize; 843 u_int64_t size; 844 int64_t tag; 845 u_int64_t ptr; 846 u_int64_t val; 847 void *d; 848 int i; 849 850 offset = elf_get_off(e, sh, SH_OFFSET); 851 entsize = elf_get_size(e, sh, SH_ENTSIZE); 852 size = elf_get_size(e, sh, SH_SIZE); 853 fprintf(out, "\ndynamic:\n"); 854 for (i = 0; (u_int64_t)i < size / entsize; i++) { 855 d = (char *)e + offset + i * entsize; 856 tag = elf_get_size(e, d, D_TAG); 857 ptr = elf_get_size(e, d, D_PTR); 858 val = elf_get_addr(e, d, D_VAL); 859 fprintf(out, "\n"); 860 fprintf(out, "entry: %d\n", i); 861 fprintf(out, "\td_tag: %s\n", d_tags(tag)); 862 switch (tag) { 863 case DT_NEEDED: 864 case DT_SONAME: 865 case DT_RPATH: 866 fprintf(out, "\td_val: %s\n", dynstr + val); 867 break; 868 case DT_PLTRELSZ: 869 case DT_RELA: 870 case DT_RELASZ: 871 case DT_RELAENT: 872 case DT_STRSZ: 873 case DT_SYMENT: 874 case DT_RELSZ: 875 case DT_RELENT: 876 case DT_PLTREL: 877 fprintf(out, "\td_val: %jd\n", (intmax_t)val); 878 break; 879 case DT_PLTGOT: 880 case DT_HASH: 881 case DT_STRTAB: 882 case DT_SYMTAB: 883 case DT_INIT: 884 case DT_FINI: 885 case DT_REL: 886 case DT_JMPREL: 887 fprintf(out, "\td_ptr: %#jx\n", ptr); 888 break; 889 case DT_NULL: 890 case DT_SYMBOLIC: 891 case DT_DEBUG: 892 case DT_TEXTREL: 893 break; 894 } 895 } 896 } 897 898 static void 899 elf_print_rela(Elf32_Ehdr *e, void *sh) 900 { 901 u_int64_t offset; 902 u_int64_t entsize; 903 u_int64_t size; 904 u_int64_t name; 905 u_int64_t info; 906 int64_t addend; 907 void *ra; 908 void *v; 909 int i; 910 911 offset = elf_get_off(e, sh, SH_OFFSET); 912 entsize = elf_get_size(e, sh, SH_ENTSIZE); 913 size = elf_get_size(e, sh, SH_SIZE); 914 name = elf_get_word(e, sh, SH_NAME); 915 v = (char *)e + offset; 916 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name); 917 for (i = 0; (u_int64_t)i < size / entsize; i++) { 918 ra = (char *)v + i * entsize; 919 offset = elf_get_addr(e, ra, RA_OFFSET); 920 info = elf_get_word(e, ra, RA_INFO); 921 addend = elf_get_off(e, ra, RA_ADDEND); 922 fprintf(out, "\n"); 923 fprintf(out, "entry: %d\n", i); 924 fprintf(out, "\tr_offset: %#jx\n", offset); 925 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 926 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend); 927 } 928 } 929 930 static void 931 elf_print_rel(Elf32_Ehdr *e, void *sh) 932 { 933 u_int64_t offset; 934 u_int64_t entsize; 935 u_int64_t size; 936 u_int64_t name; 937 u_int64_t info; 938 void *r; 939 void *v; 940 int i; 941 942 offset = elf_get_off(e, sh, SH_OFFSET); 943 entsize = elf_get_size(e, sh, SH_ENTSIZE); 944 size = elf_get_size(e, sh, SH_SIZE); 945 name = elf_get_word(e, sh, SH_NAME); 946 v = (char *)e + offset; 947 fprintf(out, "\nrelocation (%s):\n", shstrtab + name); 948 for (i = 0; (u_int64_t)i < size / entsize; i++) { 949 r = (char *)v + i * entsize; 950 offset = elf_get_addr(e, r, R_OFFSET); 951 info = elf_get_word(e, r, R_INFO); 952 fprintf(out, "\n"); 953 fprintf(out, "entry: %d\n", i); 954 fprintf(out, "\tr_offset: %#jx\n", offset); 955 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 956 } 957 } 958 959 static void 960 elf_print_interp(Elf32_Ehdr *e, void *p) 961 { 962 u_int64_t offset; 963 char *s; 964 965 offset = elf_get_off(e, p, P_OFFSET); 966 s = (char *)e + offset; 967 fprintf(out, "\ninterp:\n"); 968 fprintf(out, "\t%s\n", s); 969 } 970 971 static void 972 elf_print_got(Elf32_Ehdr *e, void *sh) 973 { 974 u_int64_t offset; 975 u_int64_t addralign; 976 u_int64_t size; 977 u_int64_t addr; 978 void *v; 979 int i; 980 981 offset = elf_get_off(e, sh, SH_OFFSET); 982 addralign = elf_get_size(e, sh, SH_ADDRALIGN); 983 size = elf_get_size(e, sh, SH_SIZE); 984 v = (char *)e + offset; 985 fprintf(out, "\nglobal offset table:\n"); 986 for (i = 0; (u_int64_t)i < size / addralign; i++) { 987 addr = elf_get_addr(e, (char *)v + i * addralign, 0); 988 fprintf(out, "\n"); 989 fprintf(out, "entry: %d\n", i); 990 fprintf(out, "\t%#jx\n", addr); 991 } 992 } 993 994 static void 995 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused) 996 { 997 } 998 999 static void 1000 elf_print_note(Elf32_Ehdr *e, void *sh) 1001 { 1002 u_int64_t offset; 1003 u_int64_t size; 1004 u_int64_t name; 1005 u_int32_t namesz; 1006 u_int32_t descsz; 1007 u_int32_t desc; 1008 char *n, *s; 1009 1010 offset = elf_get_off(e, sh, SH_OFFSET); 1011 size = elf_get_size(e, sh, SH_SIZE); 1012 name = elf_get_word(e, sh, SH_NAME); 1013 n = (char *)e + offset; 1014 fprintf(out, "\nnote (%s):\n", shstrtab + name); 1015 while (n < ((char *)e + offset + size)) { 1016 namesz = elf_get_word(e, n, N_NAMESZ); 1017 descsz = elf_get_word(e, n, N_DESCSZ); 1018 s = n + sizeof(Elf_Note); 1019 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0); 1020 fprintf(out, "\t%s %d\n", s, desc); 1021 n += sizeof(Elf_Note) + namesz + descsz; 1022 } 1023 } 1024 1025 static u_int64_t 1026 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member) 1027 { 1028 u_int64_t val; 1029 1030 val = 0; 1031 switch (e->e_ident[EI_CLASS]) { 1032 case ELFCLASS32: 1033 val = ((uint8_t *)base)[elf32_offsets[member]]; 1034 break; 1035 case ELFCLASS64: 1036 val = ((uint8_t *)base)[elf64_offsets[member]]; 1037 break; 1038 case ELFCLASSNONE: 1039 errx(1, "invalid class"); 1040 } 1041 1042 return val; 1043 } 1044 1045 static u_int64_t 1046 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member) 1047 { 1048 u_int64_t val; 1049 1050 val = 0; 1051 switch (e->e_ident[EI_CLASS]) { 1052 case ELFCLASS32: 1053 base = (char *)base + elf32_offsets[member]; 1054 switch (e->e_ident[EI_DATA]) { 1055 case ELFDATA2MSB: 1056 val = be16dec(base); 1057 break; 1058 case ELFDATA2LSB: 1059 val = le16dec(base); 1060 break; 1061 case ELFDATANONE: 1062 errx(1, "invalid data format"); 1063 } 1064 break; 1065 case ELFCLASS64: 1066 base = (char *)base + elf64_offsets[member]; 1067 switch (e->e_ident[EI_DATA]) { 1068 case ELFDATA2MSB: 1069 val = be16dec(base); 1070 break; 1071 case ELFDATA2LSB: 1072 val = le16dec(base); 1073 break; 1074 case ELFDATANONE: 1075 errx(1, "invalid data format"); 1076 } 1077 break; 1078 case ELFCLASSNONE: 1079 errx(1, "invalid class"); 1080 } 1081 1082 return val; 1083 } 1084 1085 #if 0 1086 static u_int64_t 1087 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member) 1088 { 1089 u_int64_t val; 1090 1091 val = 0; 1092 switch (e->e_ident[EI_CLASS]) { 1093 case ELFCLASS32: 1094 base = (char *)base + elf32_offsets[member]; 1095 switch (e->e_ident[EI_DATA]) { 1096 case ELFDATA2MSB: 1097 val = be16dec(base); 1098 break; 1099 case ELFDATA2LSB: 1100 val = le16dec(base); 1101 break; 1102 case ELFDATANONE: 1103 errx(1, "invalid data format"); 1104 } 1105 break; 1106 case ELFCLASS64: 1107 base = (char *)base + elf64_offsets[member]; 1108 switch (e->e_ident[EI_DATA]) { 1109 case ELFDATA2MSB: 1110 val = be32dec(base); 1111 break; 1112 case ELFDATA2LSB: 1113 val = le32dec(base); 1114 break; 1115 case ELFDATANONE: 1116 errx(1, "invalid data format"); 1117 } 1118 break; 1119 case ELFCLASSNONE: 1120 errx(1, "invalid class"); 1121 } 1122 1123 return val; 1124 } 1125 #endif 1126 1127 static u_int64_t 1128 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member) 1129 { 1130 u_int64_t val; 1131 1132 val = 0; 1133 switch (e->e_ident[EI_CLASS]) { 1134 case ELFCLASS32: 1135 base = (char *)base + elf32_offsets[member]; 1136 switch (e->e_ident[EI_DATA]) { 1137 case ELFDATA2MSB: 1138 val = be32dec(base); 1139 break; 1140 case ELFDATA2LSB: 1141 val = le32dec(base); 1142 break; 1143 case ELFDATANONE: 1144 errx(1, "invalid data format"); 1145 } 1146 break; 1147 case ELFCLASS64: 1148 base = (char *)base + elf64_offsets[member]; 1149 switch (e->e_ident[EI_DATA]) { 1150 case ELFDATA2MSB: 1151 val = be32dec(base); 1152 break; 1153 case ELFDATA2LSB: 1154 val = le32dec(base); 1155 break; 1156 case ELFDATANONE: 1157 errx(1, "invalid data format"); 1158 } 1159 break; 1160 case ELFCLASSNONE: 1161 errx(1, "invalid class"); 1162 } 1163 1164 return val; 1165 } 1166 1167 static u_int64_t 1168 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member) 1169 { 1170 u_int64_t val; 1171 1172 val = 0; 1173 switch (e->e_ident[EI_CLASS]) { 1174 case ELFCLASS32: 1175 base = (char *)base + elf32_offsets[member]; 1176 switch (e->e_ident[EI_DATA]) { 1177 case ELFDATA2MSB: 1178 val = be32dec(base); 1179 break; 1180 case ELFDATA2LSB: 1181 val = le32dec(base); 1182 break; 1183 case ELFDATANONE: 1184 errx(1, "invalid data format"); 1185 } 1186 break; 1187 case ELFCLASS64: 1188 base = (char *)base + elf64_offsets[member]; 1189 switch (e->e_ident[EI_DATA]) { 1190 case ELFDATA2MSB: 1191 val = be64dec(base); 1192 break; 1193 case ELFDATA2LSB: 1194 val = le64dec(base); 1195 break; 1196 case ELFDATANONE: 1197 errx(1, "invalid data format"); 1198 } 1199 break; 1200 case ELFCLASSNONE: 1201 errx(1, "invalid class"); 1202 } 1203 1204 return val; 1205 } 1206 1207 static void 1208 usage(void) 1209 { 1210 fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n"); 1211 exit(1); 1212 } 1213