usr.bin/elfdump/elfdump.c

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