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: stable/10/usr.bin/elfdump/elfdump.c 307834 2016-10-24 00:46:38Z emaste $"); 30 31#include <sys/types.h> 32 33#include <sys/capability.h> 34#include <sys/elf32.h> 35#include <sys/elf64.h> 36#include <sys/endian.h> 37#include <sys/mman.h> 38#include <sys/stat.h> 39#include <err.h> 40#include <errno.h> 41#include <fcntl.h> 42#include <inttypes.h> 43#include <stddef.h> 44#include <stdio.h> 45#include <stdlib.h> 46#include <string.h> 47#include <unistd.h> 48 49#define ED_DYN (1<<0) 50#define ED_EHDR (1<<1) 51#define ED_GOT (1<<2) 52#define ED_HASH (1<<3) 53#define ED_INTERP (1<<4) 54#define ED_NOTE (1<<5) 55#define ED_PHDR (1<<6) 56#define ED_REL (1<<7) 57#define ED_SHDR (1<<8) 58#define ED_SYMTAB (1<<9) 59#define ED_ALL ((1<<10)-1) 60 61#define elf_get_addr elf_get_quad 62#define elf_get_off elf_get_quad 63#define elf_get_size elf_get_quad 64 65enum elf_member { 66 D_TAG = 1, D_PTR, D_VAL, 67 68 E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY, 69 E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE, 70 E_SHNUM, E_SHSTRNDX, 71 72 N_NAMESZ, N_DESCSZ, N_TYPE, 73 74 P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS, 75 P_ALIGN, 76 77 SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK, 78 SH_INFO, SH_ADDRALIGN, SH_ENTSIZE, 79 80 ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX, 81 82 R_OFFSET, R_INFO, 83 84 RA_OFFSET, RA_INFO, RA_ADDEND 85}; 86 87typedef enum elf_member elf_member_t; 88 89static int elf32_offsets[] = { 90 0, 91 92 offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr), 93 offsetof(Elf32_Dyn, d_un.d_val), 94 95 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), 96 offsetof(Elf32_Ehdr, e_ident[EI_DATA]), 97 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), 98 offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine), 99 offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry), 100 offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff), 101 offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize), 102 offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum), 103 offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum), 104 offsetof(Elf32_Ehdr, e_shstrndx), 105 106 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), 107 offsetof(Elf_Note, n_type), 108 109 offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset), 110 offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr), 111 offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz), 112 offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align), 113 114 offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type), 115 offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr), 116 offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size), 117 offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info), 118 offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize), 119 120 offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value), 121 offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info), 122 offsetof(Elf32_Sym, st_shndx), 123 124 offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info), 125 126 offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info), 127 offsetof(Elf32_Rela, r_addend) 128}; 129 130static int elf64_offsets[] = { 131 0, 132 133 offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr), 134 offsetof(Elf64_Dyn, d_un.d_val), 135 136 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), 137 offsetof(Elf32_Ehdr, e_ident[EI_DATA]), 138 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), 139 offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine), 140 offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry), 141 offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff), 142 offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize), 143 offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum), 144 offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum), 145 offsetof(Elf64_Ehdr, e_shstrndx), 146 147 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), 148 offsetof(Elf_Note, n_type), 149 150 offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset), 151 offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr), 152 offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz), 153 offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align), 154 155 offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type), 156 offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr), 157 offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size), 158 offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info), 159 offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize), 160 161 offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value), 162 offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info), 163 offsetof(Elf64_Sym, st_shndx), 164 165 offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info), 166 167 offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info), 168 offsetof(Elf64_Rela, r_addend) 169}; 170 171/* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */ 172static const char * 173d_tags(u_int64_t tag) 174{ 175 static char unknown_tag[48]; 176 177 switch (tag) { 178 case DT_NULL: return "DT_NULL"; 179 case DT_NEEDED: return "DT_NEEDED"; 180 case DT_PLTRELSZ: return "DT_PLTRELSZ"; 181 case DT_PLTGOT: return "DT_PLTGOT"; 182 case DT_HASH: return "DT_HASH"; 183 case DT_STRTAB: return "DT_STRTAB"; 184 case DT_SYMTAB: return "DT_SYMTAB"; 185 case DT_RELA: return "DT_RELA"; 186 case DT_RELASZ: return "DT_RELASZ"; 187 case DT_RELAENT: return "DT_RELAENT"; 188 case DT_STRSZ: return "DT_STRSZ"; 189 case DT_SYMENT: return "DT_SYMENT"; 190 case DT_INIT: return "DT_INIT"; 191 case DT_FINI: return "DT_FINI"; 192 case DT_SONAME: return "DT_SONAME"; 193 case DT_RPATH: return "DT_RPATH"; 194 case DT_SYMBOLIC: return "DT_SYMBOLIC"; 195 case DT_REL: return "DT_REL"; 196 case DT_RELSZ: return "DT_RELSZ"; 197 case DT_RELENT: return "DT_RELENT"; 198 case DT_PLTREL: return "DT_PLTREL"; 199 case DT_DEBUG: return "DT_DEBUG"; 200 case DT_TEXTREL: return "DT_TEXTREL"; 201 case DT_JMPREL: return "DT_JMPREL"; 202 case DT_BIND_NOW: return "DT_BIND_NOW"; 203 case DT_INIT_ARRAY: return "DT_INIT_ARRAY"; 204 case DT_FINI_ARRAY: return "DT_FINI_ARRAY"; 205 case DT_INIT_ARRAYSZ: return "DT_INIT_ARRAYSZ"; 206 case DT_FINI_ARRAYSZ: return "DT_FINI_ARRAYSZ"; 207 case DT_RUNPATH: return "DT_RUNPATH"; 208 case DT_FLAGS: return "DT_FLAGS"; 209 case DT_PREINIT_ARRAY: return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */ 210 case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ"; 211 /* 0x6000000D - 0x6ffff000 operating system-specific semantics */ 212 case 0x6ffffdf5: return "DT_GNU_PRELINKED"; 213 case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ"; 214 case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ"; 215 case 0x6ffffdf8: return "DT_SUNW_CHECKSUM"; 216 case DT_PLTPADSZ: return "DT_PLTPADSZ"; 217 case DT_MOVEENT: return "DT_MOVEENT"; 218 case DT_MOVESZ: return "DT_MOVESZ"; 219 case DT_FEATURE: return "DT_FEATURE"; 220 case DT_POSFLAG_1: return "DT_POSFLAG_1"; 221 case DT_SYMINSZ: return "DT_SYMINSZ"; 222 case DT_SYMINENT : return "DT_SYMINENT (DT_VALRNGHI)"; 223 case DT_ADDRRNGLO: return "DT_ADDRRNGLO"; 224 case DT_GNU_HASH: return "DT_GNU_HASH"; 225 case 0x6ffffef8: return "DT_GNU_CONFLICT"; 226 case 0x6ffffef9: return "DT_GNU_LIBLIST"; 227 case DT_CONFIG: return "DT_CONFIG"; 228 case DT_DEPAUDIT: return "DT_DEPAUDIT"; 229 case DT_AUDIT: return "DT_AUDIT"; 230 case DT_PLTPAD: return "DT_PLTPAD"; 231 case DT_MOVETAB: return "DT_MOVETAB"; 232 case DT_SYMINFO : return "DT_SYMINFO (DT_ADDRRNGHI)"; 233 case DT_RELACOUNT: return "DT_RELACOUNT"; 234 case DT_RELCOUNT: return "DT_RELCOUNT"; 235 case DT_FLAGS_1: return "DT_FLAGS_1"; 236 case DT_VERDEF: return "DT_VERDEF"; 237 case DT_VERDEFNUM: return "DT_VERDEFNUM"; 238 case DT_VERNEED: return "DT_VERNEED"; 239 case DT_VERNEEDNUM: return "DT_VERNEEDNUM"; 240 case 0x6ffffff0: return "DT_GNU_VERSYM"; 241 /* 0x70000000 - 0x7fffffff processor-specific semantics */ 242 case 0x70000000: return "DT_IA_64_PLT_RESERVE"; 243 case DT_AUXILIARY: return "DT_AUXILIARY"; 244 case DT_USED: return "DT_USED"; 245 case DT_FILTER: return "DT_FILTER"; 246 } 247 snprintf(unknown_tag, sizeof(unknown_tag), 248 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag); 249 return (unknown_tag); 250} 251 252static const char * 253e_machines(u_int mach) 254{ 255 static char machdesc[64]; 256 257 switch (mach) { 258 case EM_NONE: return "EM_NONE"; 259 case EM_M32: return "EM_M32"; 260 case EM_SPARC: return "EM_SPARC"; 261 case EM_386: return "EM_386"; 262 case EM_68K: return "EM_68K"; 263 case EM_88K: return "EM_88K"; 264 case EM_IAMCU: return "EM_IAMCU"; 265 case EM_860: return "EM_860"; 266 case EM_MIPS: return "EM_MIPS"; 267 case EM_PPC: return "EM_PPC"; 268 case EM_PPC64: return "EM_PPC64"; 269 case EM_ARM: return "EM_ARM"; 270 case EM_ALPHA: return "EM_ALPHA (legacy)"; 271 case EM_SPARCV9:return "EM_SPARCV9"; 272 case EM_IA_64: return "EM_IA_64"; 273 case EM_X86_64: return "EM_X86_64"; 274 case EM_AARCH64:return "EM_AARCH64"; 275 case EM_RISCV: return "EM_RISCV"; 276 } 277 snprintf(machdesc, sizeof(machdesc), 278 "(unknown machine) -- type 0x%x", mach); 279 return (machdesc); 280} 281 282static const char *e_types[] = { 283 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE" 284}; 285 286static const char *ei_versions[] = { 287 "EV_NONE", "EV_CURRENT" 288}; 289 290static const char *ei_classes[] = { 291 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64" 292}; 293 294static const char *ei_data[] = { 295 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB" 296}; 297 298static const char *ei_abis[256] = { 299 "ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX", 300 "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX", 301 "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64", 302 "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD", 303 [255] = "ELFOSABI_STANDALONE" 304}; 305 306static const char *p_types[] = { 307 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE", 308 "PT_SHLIB", "PT_PHDR", "PT_TLS" 309}; 310 311static const char *p_flags[] = { 312 "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R", 313 "PF_X|PF_W|PF_R" 314}; 315 316/* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */ 317static const char * 318sh_types(uint64_t machine, uint64_t sht) { 319 static char unknown_buf[64]; 320 321 if (sht < 0x60000000) { 322 switch (sht) { 323 case SHT_NULL: return "SHT_NULL"; 324 case SHT_PROGBITS: return "SHT_PROGBITS"; 325 case SHT_SYMTAB: return "SHT_SYMTAB"; 326 case SHT_STRTAB: return "SHT_STRTAB"; 327 case SHT_RELA: return "SHT_RELA"; 328 case SHT_HASH: return "SHT_HASH"; 329 case SHT_DYNAMIC: return "SHT_DYNAMIC"; 330 case SHT_NOTE: return "SHT_NOTE"; 331 case SHT_NOBITS: return "SHT_NOBITS"; 332 case SHT_REL: return "SHT_REL"; 333 case SHT_SHLIB: return "SHT_SHLIB"; 334 case SHT_DYNSYM: return "SHT_DYNSYM"; 335 case SHT_INIT_ARRAY: return "SHT_INIT_ARRAY"; 336 case SHT_FINI_ARRAY: return "SHT_FINI_ARRAY"; 337 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY"; 338 case SHT_GROUP: return "SHT_GROUP"; 339 case SHT_SYMTAB_SHNDX: return "SHT_SYMTAB_SHNDX"; 340 } 341 snprintf(unknown_buf, sizeof(unknown_buf), 342 "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht); 343 return (unknown_buf); 344 } else if (sht < 0x70000000) { 345 /* 0x60000000-0x6fffffff operating system-specific semantics */ 346 switch (sht) { 347 case 0x6ffffff0: return "XXX:VERSYM"; 348 case SHT_SUNW_dof: return "SHT_SUNW_dof"; 349 case SHT_GNU_HASH: return "SHT_GNU_HASH"; 350 case 0x6ffffff7: return "SHT_GNU_LIBLIST"; 351 case 0x6ffffffc: return "XXX:VERDEF"; 352 case SHT_SUNW_verdef: return "SHT_SUNW(GNU)_verdef"; 353 case SHT_SUNW_verneed: return "SHT_SUNW(GNU)_verneed"; 354 case SHT_SUNW_versym: return "SHT_SUNW(GNU)_versym"; 355 } 356 snprintf(unknown_buf, sizeof(unknown_buf), 357 "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED", 358 (uintmax_t)sht); 359 return (unknown_buf); 360 } else if (sht < 0x80000000) { 361 /* 0x70000000-0x7fffffff processor-specific semantics */ 362 switch (machine) { 363 case EM_ARM: 364 switch (sht) { 365 case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX"; 366 case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP"; 367 case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES"; 368 case SHT_ARM_DEBUGOVERLAY: 369 return "SHT_ARM_DEBUGOVERLAY"; 370 case SHT_ARM_OVERLAYSECTION: 371 return "SHT_ARM_OVERLAYSECTION"; 372 } 373 break; 374 case EM_IA_64: 375 switch (sht) { 376 case 0x70000000: return "SHT_IA_64_EXT"; 377 case 0x70000001: return "SHT_IA_64_UNWIND"; 378 } 379 break; 380 case EM_MIPS: 381 switch (sht) { 382 case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO"; 383 case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS"; 384 case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS"; 385 } 386 break; 387 } 388 switch (sht) { 389 case 0x7ffffffd: return "XXX:AUXILIARY"; 390 case 0x7fffffff: return "XXX:FILTER"; 391 } 392 snprintf(unknown_buf, sizeof(unknown_buf), 393 "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED", 394 (uintmax_t)sht); 395 return (unknown_buf); 396 } else { 397 /* 0x80000000-0xffffffff application programs */ 398 snprintf(unknown_buf, sizeof(unknown_buf), 399 "ERROR: SHT 0x%jx NOT DEFINED", 400 (uintmax_t)sht); 401 return (unknown_buf); 402 } 403} 404 405static const char *sh_flags[] = { 406 "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR", 407 "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR", 408 "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR" 409}; 410 411static const char *st_types[] = { 412 "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE" 413}; 414 415static const char *st_bindings[] = { 416 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK" 417}; 418 419static char *dynstr; 420static char *shstrtab; 421static char *strtab; 422static FILE *out; 423 424static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member); 425static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, 426 elf_member_t member); 427#if 0 428static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member); 429#endif 430static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member); 431static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member); 432 433static void elf_print_ehdr(Elf32_Ehdr *e, void *sh); 434static void elf_print_phdr(Elf32_Ehdr *e, void *p); 435static void elf_print_shdr(Elf32_Ehdr *e, void *sh); 436static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str); 437static void elf_print_dynamic(Elf32_Ehdr *e, void *sh); 438static void elf_print_rel(Elf32_Ehdr *e, void *r); 439static void elf_print_rela(Elf32_Ehdr *e, void *ra); 440static void elf_print_interp(Elf32_Ehdr *e, void *p); 441static void elf_print_got(Elf32_Ehdr *e, void *sh); 442static void elf_print_hash(Elf32_Ehdr *e, void *sh); 443static void elf_print_note(Elf32_Ehdr *e, void *sh); 444 445static void usage(void); 446 447/* 448 * Helpers for ELF files with shnum or shstrndx values that don't fit in the 449 * ELF header. If the values are too large then an escape value is used to 450 * indicate that the actual value is found in one of section 0's fields. 451 */ 452static uint64_t 453elf_get_shnum(Elf32_Ehdr *e, void *sh) 454{ 455 uint64_t shnum; 456 457 shnum = elf_get_quarter(e, e, E_SHNUM); 458 if (shnum == 0) 459 shnum = elf_get_word(e, (char *)sh, SH_SIZE); 460 return shnum; 461} 462 463static uint64_t 464elf_get_shstrndx(Elf32_Ehdr *e, void *sh) 465{ 466 uint64_t shstrndx; 467 468 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 469 if (shstrndx == SHN_XINDEX) 470 shstrndx = elf_get_word(e, (char *)sh, SH_LINK); 471 return shstrndx; 472} 473 474int 475main(int ac, char **av) 476{ 477 cap_rights_t rights; 478 u_int64_t phoff; 479 u_int64_t shoff; 480 u_int64_t phentsize; 481 u_int64_t phnum; 482 u_int64_t shentsize; 483 u_int64_t shnum; 484 u_int64_t shstrndx; 485 u_int64_t offset; 486 u_int64_t name; 487 u_int64_t type; 488 struct stat sb; 489 u_int flags; 490 Elf32_Ehdr *e; 491 void *p; 492 void *sh; 493 void *v; 494 int fd; 495 int ch; 496 int i; 497 498 out = stdout; 499 flags = 0; 500 while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1) 501 switch (ch) { 502 case 'a': 503 flags = ED_ALL; 504 break; 505 case 'c': 506 flags |= ED_SHDR; 507 break; 508 case 'd': 509 flags |= ED_DYN; 510 break; 511 case 'e': 512 flags |= ED_EHDR; 513 break; 514 case 'i': 515 flags |= ED_INTERP; 516 break; 517 case 'G': 518 flags |= ED_GOT; 519 break; 520 case 'h': 521 flags |= ED_HASH; 522 break; 523 case 'n': 524 flags |= ED_NOTE; 525 break; 526 case 'p': 527 flags |= ED_PHDR; 528 break; 529 case 'r': 530 flags |= ED_REL; 531 break; 532 case 's': 533 flags |= ED_SYMTAB; 534 break; 535 case 'w': 536 if ((out = fopen(optarg, "w")) == NULL) 537 err(1, "%s", optarg); 538 cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE); 539 if (cap_rights_limit(fileno(out), &rights) < 0 && errno != ENOSYS) 540 err(1, "unable to limit rights for %s", optarg); 541 break; 542 case '?': 543 default: 544 usage(); 545 } 546 ac -= optind; 547 av += optind; 548 if (ac == 0 || flags == 0) 549 usage(); 550 if ((fd = open(*av, O_RDONLY)) < 0 || 551 fstat(fd, &sb) < 0) 552 err(1, "%s", *av); 553 cap_rights_init(&rights, CAP_MMAP_R); 554 if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS) 555 err(1, "unable to limit rights for %s", *av); 556 close(STDIN_FILENO); 557 cap_rights_init(&rights, CAP_WRITE); 558 if (cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS) 559 err(1, "unable to limit rights for stdout"); 560 if (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS) 561 err(1, "unable to limit rights for stderr"); 562 if (cap_enter() < 0 && errno != ENOSYS) 563 err(1, "unable to enter capability mode"); 564 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); 565 if (e == MAP_FAILED) 566 err(1, NULL); 567 if (!IS_ELF(*(Elf32_Ehdr *)e)) 568 errx(1, "not an elf file"); 569 phoff = elf_get_off(e, e, E_PHOFF); 570 shoff = elf_get_off(e, e, E_SHOFF); 571 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 572 phnum = elf_get_quarter(e, e, E_PHNUM); 573 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 574 p = (char *)e + phoff; 575 if (shoff > 0) { 576 sh = (char *)e + shoff; 577 shnum = elf_get_shnum(e, sh); 578 shstrndx = elf_get_shstrndx(e, sh); 579 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize, 580 SH_OFFSET); 581 shstrtab = (char *)e + offset; 582 } else { 583 sh = NULL; 584 shnum = 0; 585 shstrndx = 0; 586 shstrtab = NULL; 587 } 588 for (i = 0; (u_int64_t)i < shnum; i++) { 589 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME); 590 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET); 591 if (strcmp(shstrtab + name, ".strtab") == 0) 592 strtab = (char *)e + offset; 593 if (strcmp(shstrtab + name, ".dynstr") == 0) 594 dynstr = (char *)e + offset; 595 } 596 if (flags & ED_EHDR) 597 elf_print_ehdr(e, sh); 598 if (flags & ED_PHDR) 599 elf_print_phdr(e, p); 600 if (flags & ED_SHDR) 601 elf_print_shdr(e, sh); 602 for (i = 0; (u_int64_t)i < phnum; i++) { 603 v = (char *)p + i * phentsize; 604 type = elf_get_word(e, v, P_TYPE); 605 switch (type) { 606 case PT_INTERP: 607 if (flags & ED_INTERP) 608 elf_print_interp(e, v); 609 break; 610 case PT_NULL: 611 case PT_LOAD: 612 case PT_DYNAMIC: 613 case PT_NOTE: 614 case PT_SHLIB: 615 case PT_PHDR: 616 break; 617 } 618 } 619 for (i = 0; (u_int64_t)i < shnum; i++) { 620 v = (char *)sh + i * shentsize; 621 type = elf_get_word(e, v, SH_TYPE); 622 switch (type) { 623 case SHT_SYMTAB: 624 if (flags & ED_SYMTAB) 625 elf_print_symtab(e, v, strtab); 626 break; 627 case SHT_DYNAMIC: 628 if (flags & ED_DYN) 629 elf_print_dynamic(e, v); 630 break; 631 case SHT_RELA: 632 if (flags & ED_REL) 633 elf_print_rela(e, v); 634 break; 635 case SHT_REL: 636 if (flags & ED_REL) 637 elf_print_rel(e, v); 638 break; 639 case SHT_NOTE: 640 name = elf_get_word(e, v, SH_NAME); 641 if (flags & ED_NOTE && 642 strcmp(shstrtab + name, ".note.ABI-tag") == 0) 643 elf_print_note(e, v); 644 break; 645 case SHT_DYNSYM: 646 if (flags & ED_SYMTAB) 647 elf_print_symtab(e, v, dynstr); 648 break; 649 case SHT_PROGBITS: 650 name = elf_get_word(e, v, SH_NAME); 651 if (flags & ED_GOT && 652 strcmp(shstrtab + name, ".got") == 0) 653 elf_print_got(e, v); 654 break; 655 case SHT_HASH: 656 if (flags & ED_HASH) 657 elf_print_hash(e, v); 658 break; 659 case SHT_NULL: 660 case SHT_STRTAB: 661 case SHT_NOBITS: 662 case SHT_SHLIB: 663 break; 664 } 665 } 666 667 return 0; 668} 669 670static void 671elf_print_ehdr(Elf32_Ehdr *e, void *sh) 672{ 673 u_int64_t class; 674 u_int64_t data; 675 u_int64_t osabi; 676 u_int64_t type; 677 u_int64_t machine; 678 u_int64_t version; 679 u_int64_t entry; 680 u_int64_t phoff; 681 u_int64_t shoff; 682 u_int64_t flags; 683 u_int64_t ehsize; 684 u_int64_t phentsize; 685 u_int64_t phnum; 686 u_int64_t shentsize; 687 u_int64_t shnum; 688 u_int64_t shstrndx; 689 690 class = elf_get_byte(e, e, E_CLASS); 691 data = elf_get_byte(e, e, E_DATA); 692 osabi = elf_get_byte(e, e, E_OSABI); 693 type = elf_get_quarter(e, e, E_TYPE); 694 machine = elf_get_quarter(e, e, E_MACHINE); 695 version = elf_get_word(e, e, E_VERSION); 696 entry = elf_get_addr(e, e, E_ENTRY); 697 phoff = elf_get_off(e, e, E_PHOFF); 698 shoff = elf_get_off(e, e, E_SHOFF); 699 flags = elf_get_word(e, e, E_FLAGS); 700 ehsize = elf_get_quarter(e, e, E_EHSIZE); 701 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 702 phnum = elf_get_quarter(e, e, E_PHNUM); 703 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 704 fprintf(out, "\nelf header:\n"); 705 fprintf(out, "\n"); 706 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data], 707 ei_abis[osabi]); 708 fprintf(out, "\te_type: %s\n", e_types[type]); 709 fprintf(out, "\te_machine: %s\n", e_machines(machine)); 710 fprintf(out, "\te_version: %s\n", ei_versions[version]); 711 fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry); 712 fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff); 713 fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff); 714 fprintf(out, "\te_flags: %jd\n", (intmax_t)flags); 715 fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize); 716 fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize); 717 fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum); 718 fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize); 719 if (sh != NULL) { 720 shnum = elf_get_shnum(e, sh); 721 shstrndx = elf_get_shstrndx(e, sh); 722 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum); 723 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx); 724 } 725} 726 727static void 728elf_print_phdr(Elf32_Ehdr *e, void *p) 729{ 730 u_int64_t phentsize; 731 u_int64_t phnum; 732 u_int64_t type; 733 u_int64_t offset; 734 u_int64_t vaddr; 735 u_int64_t paddr; 736 u_int64_t filesz; 737 u_int64_t memsz; 738 u_int64_t flags; 739 u_int64_t align; 740 void *v; 741 int i; 742 743 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 744 phnum = elf_get_quarter(e, e, E_PHNUM); 745 fprintf(out, "\nprogram header:\n"); 746 for (i = 0; (u_int64_t)i < phnum; i++) { 747 v = (char *)p + i * phentsize; 748 type = elf_get_word(e, v, P_TYPE); 749 offset = elf_get_off(e, v, P_OFFSET); 750 vaddr = elf_get_addr(e, v, P_VADDR); 751 paddr = elf_get_addr(e, v, P_PADDR); 752 filesz = elf_get_size(e, v, P_FILESZ); 753 memsz = elf_get_size(e, v, P_MEMSZ); 754 flags = elf_get_word(e, v, P_FLAGS); 755 align = elf_get_size(e, v, P_ALIGN); 756 fprintf(out, "\n"); 757 fprintf(out, "entry: %d\n", i); 758 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]); 759 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset); 760 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr); 761 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr); 762 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz); 763 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz); 764 fprintf(out, "\tp_flags: %s\n", p_flags[flags]); 765 fprintf(out, "\tp_align: %jd\n", (intmax_t)align); 766 } 767} 768 769static void 770elf_print_shdr(Elf32_Ehdr *e, void *sh) 771{ 772 u_int64_t shentsize; 773 u_int64_t shnum; 774 u_int64_t name; 775 u_int64_t type; 776 u_int64_t flags; 777 u_int64_t addr; 778 u_int64_t offset; 779 u_int64_t size; 780 u_int64_t shlink; 781 u_int64_t info; 782 u_int64_t addralign; 783 u_int64_t entsize; 784 u_int64_t machine; 785 void *v; 786 int i; 787 788 if (sh == NULL) { 789 fprintf(out, "\nNo section headers\n"); 790 return; 791 } 792 793 machine = elf_get_quarter(e, e, E_MACHINE); 794 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 795 shnum = elf_get_shnum(e, sh); 796 fprintf(out, "\nsection header:\n"); 797 for (i = 0; (u_int64_t)i < shnum; i++) { 798 v = (char *)sh + i * shentsize; 799 name = elf_get_word(e, v, SH_NAME); 800 type = elf_get_word(e, v, SH_TYPE); 801 flags = elf_get_word(e, v, SH_FLAGS); 802 addr = elf_get_addr(e, v, SH_ADDR); 803 offset = elf_get_off(e, v, SH_OFFSET); 804 size = elf_get_size(e, v, SH_SIZE); 805 shlink = elf_get_word(e, v, SH_LINK); 806 info = elf_get_word(e, v, SH_INFO); 807 addralign = elf_get_size(e, v, SH_ADDRALIGN); 808 entsize = elf_get_size(e, v, SH_ENTSIZE); 809 fprintf(out, "\n"); 810 fprintf(out, "entry: %d\n", i); 811 fprintf(out, "\tsh_name: %s\n", shstrtab + name); 812 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type)); 813 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]); 814 fprintf(out, "\tsh_addr: %#jx\n", addr); 815 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset); 816 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size); 817 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink); 818 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info); 819 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign); 820 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize); 821 } 822} 823 824static void 825elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str) 826{ 827 u_int64_t offset; 828 u_int64_t entsize; 829 u_int64_t size; 830 u_int64_t name; 831 u_int64_t value; 832 u_int64_t info; 833 u_int64_t shndx; 834 void *st; 835 int len; 836 int i; 837 838 offset = elf_get_off(e, sh, SH_OFFSET); 839 entsize = elf_get_size(e, sh, SH_ENTSIZE); 840 size = elf_get_size(e, sh, SH_SIZE); 841 name = elf_get_word(e, sh, SH_NAME); 842 len = size / entsize; 843 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name); 844 for (i = 0; i < len; i++) { 845 st = (char *)e + offset + i * entsize; 846 name = elf_get_word(e, st, ST_NAME); 847 value = elf_get_addr(e, st, ST_VALUE); 848 size = elf_get_size(e, st, ST_SIZE); 849 info = elf_get_byte(e, st, ST_INFO); 850 shndx = elf_get_quarter(e, st, ST_SHNDX); 851 fprintf(out, "\n"); 852 fprintf(out, "entry: %d\n", i); 853 fprintf(out, "\tst_name: %s\n", str + name); 854 fprintf(out, "\tst_value: %#jx\n", value); 855 fprintf(out, "\tst_size: %jd\n", (intmax_t)size); 856 fprintf(out, "\tst_info: %s %s\n", 857 st_types[ELF32_ST_TYPE(info)], 858 st_bindings[ELF32_ST_BIND(info)]); 859 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx); 860 } 861} 862 863static void 864elf_print_dynamic(Elf32_Ehdr *e, void *sh) 865{ 866 u_int64_t offset; 867 u_int64_t entsize; 868 u_int64_t size; 869 int64_t tag; 870 u_int64_t ptr; 871 u_int64_t val; 872 void *d; 873 int i; 874 875 offset = elf_get_off(e, sh, SH_OFFSET); 876 entsize = elf_get_size(e, sh, SH_ENTSIZE); 877 size = elf_get_size(e, sh, SH_SIZE); 878 fprintf(out, "\ndynamic:\n"); 879 for (i = 0; (u_int64_t)i < size / entsize; i++) { 880 d = (char *)e + offset + i * entsize; 881 tag = elf_get_size(e, d, D_TAG); 882 ptr = elf_get_size(e, d, D_PTR); 883 val = elf_get_addr(e, d, D_VAL); 884 fprintf(out, "\n"); 885 fprintf(out, "entry: %d\n", i); 886 fprintf(out, "\td_tag: %s\n", d_tags(tag)); 887 switch (tag) { 888 case DT_NEEDED: 889 case DT_SONAME: 890 case DT_RPATH: 891 fprintf(out, "\td_val: %s\n", dynstr + val); 892 break; 893 case DT_PLTRELSZ: 894 case DT_RELA: 895 case DT_RELASZ: 896 case DT_RELAENT: 897 case DT_STRSZ: 898 case DT_SYMENT: 899 case DT_RELSZ: 900 case DT_RELENT: 901 case DT_PLTREL: 902 fprintf(out, "\td_val: %jd\n", (intmax_t)val); 903 break; 904 case DT_PLTGOT: 905 case DT_HASH: 906 case DT_STRTAB: 907 case DT_SYMTAB: 908 case DT_INIT: 909 case DT_FINI: 910 case DT_REL: 911 case DT_JMPREL: 912 fprintf(out, "\td_ptr: %#jx\n", ptr); 913 break; 914 case DT_NULL: 915 case DT_SYMBOLIC: 916 case DT_DEBUG: 917 case DT_TEXTREL: 918 break; 919 } 920 } 921} 922 923static void 924elf_print_rela(Elf32_Ehdr *e, void *sh) 925{ 926 u_int64_t offset; 927 u_int64_t entsize; 928 u_int64_t size; 929 u_int64_t name; 930 u_int64_t info; 931 int64_t addend; 932 void *ra; 933 void *v; 934 int i; 935 936 offset = elf_get_off(e, sh, SH_OFFSET); 937 entsize = elf_get_size(e, sh, SH_ENTSIZE); 938 size = elf_get_size(e, sh, SH_SIZE); 939 name = elf_get_word(e, sh, SH_NAME); 940 v = (char *)e + offset; 941 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name); 942 for (i = 0; (u_int64_t)i < size / entsize; i++) { 943 ra = (char *)v + i * entsize; 944 offset = elf_get_addr(e, ra, RA_OFFSET); 945 info = elf_get_word(e, ra, RA_INFO); 946 addend = elf_get_off(e, ra, RA_ADDEND); 947 fprintf(out, "\n"); 948 fprintf(out, "entry: %d\n", i); 949 fprintf(out, "\tr_offset: %#jx\n", offset); 950 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 951 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend); 952 } 953} 954 955static void 956elf_print_rel(Elf32_Ehdr *e, void *sh) 957{ 958 u_int64_t offset; 959 u_int64_t entsize; 960 u_int64_t size; 961 u_int64_t name; 962 u_int64_t info; 963 void *r; 964 void *v; 965 int i; 966 967 offset = elf_get_off(e, sh, SH_OFFSET); 968 entsize = elf_get_size(e, sh, SH_ENTSIZE); 969 size = elf_get_size(e, sh, SH_SIZE); 970 name = elf_get_word(e, sh, SH_NAME); 971 v = (char *)e + offset; 972 fprintf(out, "\nrelocation (%s):\n", shstrtab + name); 973 for (i = 0; (u_int64_t)i < size / entsize; i++) { 974 r = (char *)v + i * entsize; 975 offset = elf_get_addr(e, r, R_OFFSET); 976 info = elf_get_word(e, r, R_INFO); 977 fprintf(out, "\n"); 978 fprintf(out, "entry: %d\n", i); 979 fprintf(out, "\tr_offset: %#jx\n", offset); 980 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 981 } 982} 983 984static void 985elf_print_interp(Elf32_Ehdr *e, void *p) 986{ 987 u_int64_t offset; 988 char *s; 989 990 offset = elf_get_off(e, p, P_OFFSET); 991 s = (char *)e + offset; 992 fprintf(out, "\ninterp:\n"); 993 fprintf(out, "\t%s\n", s); 994} 995 996static void 997elf_print_got(Elf32_Ehdr *e, void *sh) 998{ 999 u_int64_t offset; 1000 u_int64_t addralign; 1001 u_int64_t size; 1002 u_int64_t addr; 1003 void *v; 1004 int i; 1005 1006 offset = elf_get_off(e, sh, SH_OFFSET); 1007 addralign = elf_get_size(e, sh, SH_ADDRALIGN); 1008 size = elf_get_size(e, sh, SH_SIZE); 1009 v = (char *)e + offset; 1010 fprintf(out, "\nglobal offset table:\n"); 1011 for (i = 0; (u_int64_t)i < size / addralign; i++) { 1012 addr = elf_get_addr(e, (char *)v + i * addralign, 0); 1013 fprintf(out, "\n"); 1014 fprintf(out, "entry: %d\n", i); 1015 fprintf(out, "\t%#jx\n", addr); 1016 } 1017} 1018 1019static void 1020elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused) 1021{ 1022} 1023 1024static void 1025elf_print_note(Elf32_Ehdr *e, void *sh) 1026{ 1027 u_int64_t offset; 1028 u_int64_t size; 1029 u_int64_t name; 1030 u_int32_t namesz; 1031 u_int32_t descsz; 1032 u_int32_t desc; 1033 char *n, *s; 1034 1035 offset = elf_get_off(e, sh, SH_OFFSET); 1036 size = elf_get_size(e, sh, SH_SIZE); 1037 name = elf_get_word(e, sh, SH_NAME); 1038 n = (char *)e + offset; 1039 fprintf(out, "\nnote (%s):\n", shstrtab + name); 1040 while (n < ((char *)e + offset + size)) { 1041 namesz = elf_get_word(e, n, N_NAMESZ); 1042 descsz = elf_get_word(e, n, N_DESCSZ); 1043 s = n + sizeof(Elf_Note); 1044 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0); 1045 fprintf(out, "\t%s %d\n", s, desc); 1046 n += sizeof(Elf_Note) + namesz + descsz; 1047 } 1048} 1049 1050static u_int64_t 1051elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member) 1052{ 1053 u_int64_t val; 1054 1055 val = 0; 1056 switch (e->e_ident[EI_CLASS]) { 1057 case ELFCLASS32: 1058 val = ((uint8_t *)base)[elf32_offsets[member]]; 1059 break; 1060 case ELFCLASS64: 1061 val = ((uint8_t *)base)[elf64_offsets[member]]; 1062 break; 1063 case ELFCLASSNONE: 1064 errx(1, "invalid class"); 1065 } 1066 1067 return val; 1068} 1069 1070static u_int64_t 1071elf_get_quarter(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 = be16dec(base); 1082 break; 1083 case ELFDATA2LSB: 1084 val = le16dec(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 = be16dec(base); 1095 break; 1096 case ELFDATA2LSB: 1097 val = le16dec(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 1110#if 0 1111static u_int64_t 1112elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member) 1113{ 1114 u_int64_t val; 1115 1116 val = 0; 1117 switch (e->e_ident[EI_CLASS]) { 1118 case ELFCLASS32: 1119 base = (char *)base + elf32_offsets[member]; 1120 switch (e->e_ident[EI_DATA]) { 1121 case ELFDATA2MSB: 1122 val = be16dec(base); 1123 break; 1124 case ELFDATA2LSB: 1125 val = le16dec(base); 1126 break; 1127 case ELFDATANONE: 1128 errx(1, "invalid data format"); 1129 } 1130 break; 1131 case ELFCLASS64: 1132 base = (char *)base + elf64_offsets[member]; 1133 switch (e->e_ident[EI_DATA]) { 1134 case ELFDATA2MSB: 1135 val = be32dec(base); 1136 break; 1137 case ELFDATA2LSB: 1138 val = le32dec(base); 1139 break; 1140 case ELFDATANONE: 1141 errx(1, "invalid data format"); 1142 } 1143 break; 1144 case ELFCLASSNONE: 1145 errx(1, "invalid class"); 1146 } 1147 1148 return val; 1149} 1150#endif 1151 1152static u_int64_t 1153elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member) 1154{ 1155 u_int64_t val; 1156 1157 val = 0; 1158 switch (e->e_ident[EI_CLASS]) { 1159 case ELFCLASS32: 1160 base = (char *)base + elf32_offsets[member]; 1161 switch (e->e_ident[EI_DATA]) { 1162 case ELFDATA2MSB: 1163 val = be32dec(base); 1164 break; 1165 case ELFDATA2LSB: 1166 val = le32dec(base); 1167 break; 1168 case ELFDATANONE: 1169 errx(1, "invalid data format"); 1170 } 1171 break; 1172 case ELFCLASS64: 1173 base = (char *)base + elf64_offsets[member]; 1174 switch (e->e_ident[EI_DATA]) { 1175 case ELFDATA2MSB: 1176 val = be32dec(base); 1177 break; 1178 case ELFDATA2LSB: 1179 val = le32dec(base); 1180 break; 1181 case ELFDATANONE: 1182 errx(1, "invalid data format"); 1183 } 1184 break; 1185 case ELFCLASSNONE: 1186 errx(1, "invalid class"); 1187 } 1188 1189 return val; 1190} 1191 1192static u_int64_t 1193elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member) 1194{ 1195 u_int64_t val; 1196 1197 val = 0; 1198 switch (e->e_ident[EI_CLASS]) { 1199 case ELFCLASS32: 1200 base = (char *)base + elf32_offsets[member]; 1201 switch (e->e_ident[EI_DATA]) { 1202 case ELFDATA2MSB: 1203 val = be32dec(base); 1204 break; 1205 case ELFDATA2LSB: 1206 val = le32dec(base); 1207 break; 1208 case ELFDATANONE: 1209 errx(1, "invalid data format"); 1210 } 1211 break; 1212 case ELFCLASS64: 1213 base = (char *)base + elf64_offsets[member]; 1214 switch (e->e_ident[EI_DATA]) { 1215 case ELFDATA2MSB: 1216 val = be64dec(base); 1217 break; 1218 case ELFDATA2LSB: 1219 val = le64dec(base); 1220 break; 1221 case ELFDATANONE: 1222 errx(1, "invalid data format"); 1223 } 1224 break; 1225 case ELFCLASSNONE: 1226 errx(1, "invalid class"); 1227 } 1228 1229 return val; 1230} 1231 1232static void 1233usage(void) 1234{ 1235 fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n"); 1236 exit(1); 1237} 1238