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 0x6ffffff4: return "SHT_SUNW_dof";
 326         case 0x6ffffff7: return "SHT_GNU_LIBLIST";
 327         case 0x6ffffffc: return "XXX:VERDEF";
 328         case 0x6ffffffd: return "SHT_SUNW(GNU)_verdef";
 329         case 0x6ffffffe: return "SHT_SUNW(GNU)_verneed";
 330         case 0x6fffffff: return "SHT_SUNW(GNU)_versym";
 331         /* 0x70000000 - 0x7fffffff processor-specific semantics */
 332         case 0x70000000: return "SHT_IA_64_EXT";
 333         case 0x70000001: return "SHT_IA_64_UNWIND";
 334         case 0x7ffffffd: return "XXX:AUXILIARY";
 335         case 0x7fffffff: return "XXX:FILTER";
 336         /* 0x80000000 - 0xffffffff application programs */
 337         default: return "ERROR: SHT NOT DEFINED";
 338         }
 339 }
 340
 341 const char *sh_flags[] = {
 342         "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
 343         "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
 344         "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
 345 };
 346
 347 const char *st_types[] = {
 348         "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE"
 349 };
 350
 351 const char *st_bindings[] = {
 352         "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
 353 };
 354
 355 char *dynstr;
 356 char *shstrtab;
 357 char *strtab;
 358 FILE *out;
 359
 360 u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
 361 u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member);
 362 u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
 363 u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
 364 u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
 365
 366 void elf_print_ehdr(Elf32_Ehdr *e);
 367 void elf_print_phdr(Elf32_Ehdr *e, void *p);
 368 void elf_print_shdr(Elf32_Ehdr *e, void *sh);
 369 void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
 370 void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
 371 void elf_print_rel(Elf32_Ehdr *e, void *r);
 372 void elf_print_rela(Elf32_Ehdr *e, void *ra);
 373 void elf_print_interp(Elf32_Ehdr *e, void *p);
 374 void elf_print_got(Elf32_Ehdr *e, void *sh);
 375 void elf_print_hash(Elf32_Ehdr *e, void *sh);
 376 void elf_print_note(Elf32_Ehdr *e, void *sh);
 377
 378 void usage(void);
 379
 380 int
 381 main(int ac, char **av)
 382 {
 383         u_int64_t phoff;
 384         u_int64_t shoff;
 385         u_int64_t phentsize;
 386         u_int64_t phnum;
 387         u_int64_t shentsize;
 388         u_int64_t shnum;
 389         u_int64_t shstrndx;
 390         u_int64_t offset;
 391         u_int64_t name;
 392         u_int64_t type;
 393         struct stat sb;
 394         u_int flags;
 395         Elf32_Ehdr *e;
 396         void *p;
 397         void *sh;
 398         void *v;
 399         int fd;
 400         int ch;
 401         int i;
 402
 403         out = stdout;
 404         flags = 0;
 405         while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
 406                 switch (ch) {
 407                 case 'a':
 408                         flags = ED_ALL;
 409                         break;
 410                 case 'c':
 411                         flags |= ED_SHDR;
 412                         break;
 413                 case 'd':
 414                         flags |= ED_DYN;
 415                         break;
 416                 case 'e':
 417                         flags |= ED_EHDR;
 418                         break;
 419                 case 'i':
 420                         flags |= ED_INTERP;
 421                         break;
 422                 case 'G':
 423                         flags |= ED_GOT;
 424                         break;
 425                 case 'h':
 426                         flags |= ED_HASH;
 427                         break;
 428                 case 'n':
 429                         flags |= ED_NOTE;
 430                         break;
 431                 case 'p':
 432                         flags |= ED_PHDR;
 433                         break;
 434                 case 'r':
 435                         flags |= ED_REL;
 436                         break;
 437                 case 's':
 438                         flags |= ED_SYMTAB;
 439                         break;
 440                 case 'w':
 441                         if ((out = fopen(optarg, "w")) == NULL)
 442                                 err(1, "%s", optarg);
 443                         break;
 444                 case '?':
 445                 default:
 446                         usage();
 447                 }
 448         ac -= optind;
 449         av += optind;
 450         if (ac == 0 || flags == 0)
 451                 usage();
 452         if ((fd = open(*av, O_RDONLY)) < 0 ||
 453             fstat(fd, &sb) < 0)
 454                 err(1, "%s", *av);
 455         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 456         if (e == MAP_FAILED)
 457                 err(1, NULL);
 458         if (!IS_ELF(*(Elf32_Ehdr *)e))
 459                 errx(1, "not an elf file");
 460         phoff = elf_get_off(e, e, E_PHOFF);
 461         shoff = elf_get_off(e, e, E_SHOFF);
 462         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 463         phnum = elf_get_quarter(e, e, E_PHNUM);
 464         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 465         shnum = elf_get_quarter(e, e, E_SHNUM);
 466         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 467         p = (char *)e + phoff;
 468         sh = (char *)e + shoff;
 469         offset = elf_get_off(e, (char *)sh + shstrndx * shentsize, SH_OFFSET);
 470         shstrtab = (char *)e + offset;
 471         for (i = 0; (u_int64_t)i < shnum; i++) {
 472                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 473                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 474                 if (strcmp(shstrtab + name, ".strtab") == 0)
 475                         strtab = (char *)e + offset;
 476                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 477                         dynstr = (char *)e + offset;
 478         }
 479         if (flags & ED_EHDR)
 480                 elf_print_ehdr(e);
 481         if (flags & ED_PHDR)
 482                 elf_print_phdr(e, p);
 483         if (flags & ED_SHDR)
 484                 elf_print_shdr(e, sh);
 485         for (i = 0; (u_int64_t)i < phnum; i++) {
 486                 v = (char *)p + i * phentsize;
 487                 type = elf_get_word(e, v, P_TYPE);
 488                 switch (type) {
 489                 case PT_INTERP:
 490                         if (flags & ED_INTERP)
 491                                 elf_print_interp(e, v);
 492                         break;
 493                 case PT_NULL:
 494                 case PT_LOAD:
 495                 case PT_DYNAMIC:
 496                 case PT_NOTE:
 497                 case PT_SHLIB:
 498                 case PT_PHDR:
 499                         break;
 500                 }
 501         }
 502         for (i = 0; (u_int64_t)i < shnum; i++) {
 503                 v = (char *)sh + i * shentsize;
 504                 type = elf_get_word(e, v, SH_TYPE);
 505                 switch (type) {
 506                 case SHT_SYMTAB:
 507                         if (flags & ED_SYMTAB)
 508                                 elf_print_symtab(e, v, strtab);
 509                         break;
 510                 case SHT_DYNAMIC:
 511                         if (flags & ED_DYN)
 512                                 elf_print_dynamic(e, v);
 513                         break;
 514                 case SHT_RELA:
 515                         if (flags & ED_REL)
 516                                 elf_print_rela(e, v);
 517                         break;
 518                 case SHT_REL:
 519                         if (flags & ED_REL)
 520                                 elf_print_rel(e, v);
 521                         break;
 522                 case SHT_NOTE:
 523                         name = elf_get_word(e, v, SH_NAME);
 524                         if (flags & ED_NOTE &&
 525                             strcmp(shstrtab + name, ".note.ABI-tag") == 0)
 526                                 elf_print_note(e, v);
 527                         break;
 528                 case SHT_DYNSYM:
 529                         if (flags & ED_SYMTAB)
 530                                 elf_print_symtab(e, v, dynstr);
 531                         break;
 532                 case SHT_PROGBITS:
 533                         name = elf_get_word(e, v, SH_NAME);
 534                         if (flags & ED_GOT &&
 535                             strcmp(shstrtab + name, ".got") == 0)
 536                                 elf_print_got(e, v);
 537                         break;
 538                 case SHT_HASH:
 539                         if (flags & ED_HASH)
 540                                 elf_print_hash(e, v);
 541                         break;
 542                 case SHT_NULL:
 543                 case SHT_STRTAB:
 544                 case SHT_NOBITS:
 545                 case SHT_SHLIB:
 546                         break;
 547                 }
 548         }
 549
 550         return 0;
 551 }
 552
 553 void
 554 elf_print_ehdr(Elf32_Ehdr *e)
 555 {
 556         u_int64_t class;
 557         u_int64_t data;
 558         u_int64_t osabi;
 559         u_int64_t type;
 560         u_int64_t machine;
 561         u_int64_t version;
 562         u_int64_t entry;
 563         u_int64_t phoff;
 564         u_int64_t shoff;
 565         u_int64_t flags;
 566         u_int64_t ehsize;
 567         u_int64_t phentsize;
 568         u_int64_t phnum;
 569         u_int64_t shentsize;
 570         u_int64_t shnum;
 571         u_int64_t shstrndx;
 572
 573         class = elf_get_byte(e, e, E_CLASS);
 574         data = elf_get_byte(e, e, E_DATA);
 575         osabi = elf_get_byte(e, e, E_OSABI);
 576         type = elf_get_quarter(e, e, E_TYPE);
 577         machine = elf_get_quarter(e, e, E_MACHINE);
 578         version = elf_get_word(e, e, E_VERSION);
 579         entry = elf_get_addr(e, e, E_ENTRY);
 580         phoff = elf_get_off(e, e, E_PHOFF);
 581         shoff = elf_get_off(e, e, E_SHOFF);
 582         flags = elf_get_word(e, e, E_FLAGS);
 583         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 584         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 585         phnum = elf_get_quarter(e, e, E_PHNUM);
 586         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 587         shnum = elf_get_quarter(e, e, E_SHNUM);
 588         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 589         fprintf(out, "\nelf header:\n");
 590         fprintf(out, "\n");
 591         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 592             ei_abis[osabi]);
 593         fprintf(out, "\te_type: %s\n", e_types[type]);
 594         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 595         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 596         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 597         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 598         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 599         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 600         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 601         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 602         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 603         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 604         fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 605         fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 606 }
 607
 608 void
 609 elf_print_phdr(Elf32_Ehdr *e, void *p)
 610 {
 611         u_int64_t phentsize;
 612         u_int64_t phnum;
 613         u_int64_t type;
 614         u_int64_t offset;
 615         u_int64_t vaddr;
 616         u_int64_t paddr;
 617         u_int64_t filesz;
 618         u_int64_t memsz;
 619         u_int64_t flags;
 620         u_int64_t align;
 621         void *v;
 622         int i;
 623
 624         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 625         phnum = elf_get_quarter(e, e, E_PHNUM);
 626         fprintf(out, "\nprogram header:\n");
 627         for (i = 0; (u_int64_t)i < phnum; i++) {
 628                 v = (char *)p + i * phentsize;
 629                 type = elf_get_word(e, v, P_TYPE);
 630                 offset = elf_get_off(e, v, P_OFFSET);
 631                 vaddr = elf_get_addr(e, v, P_VADDR);
 632                 paddr = elf_get_addr(e, v, P_PADDR);
 633                 filesz = elf_get_size(e, v, P_FILESZ);
 634                 memsz = elf_get_size(e, v, P_MEMSZ);
 635                 flags = elf_get_word(e, v, P_FLAGS);
 636                 align = elf_get_size(e, v, P_ALIGN);
 637                 fprintf(out, "\n");
 638                 fprintf(out, "entry: %d\n", i);
 639                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 640                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 641                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 642                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 643                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 644                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 645                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 646                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 647         }
 648 }
 649
 650 void
 651 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 652 {
 653         u_int64_t shentsize;
 654         u_int64_t shnum;
 655         u_int64_t name;
 656         u_int64_t type;
 657         u_int64_t flags;
 658         u_int64_t addr;
 659         u_int64_t offset;
 660         u_int64_t size;
 661         u_int64_t shlink;
 662         u_int64_t info;
 663         u_int64_t addralign;
 664         u_int64_t entsize;
 665         void *v;
 666         int i;
 667
 668         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 669         shnum = elf_get_quarter(e, e, E_SHNUM);
 670         fprintf(out, "\nsection header:\n");
 671         for (i = 0; (u_int64_t)i < shnum; i++) {
 672                 v = (char *)sh + i * shentsize;
 673                 name = elf_get_word(e, v, SH_NAME);
 674                 type = elf_get_word(e, v, SH_TYPE);
 675                 flags = elf_get_word(e, v, SH_FLAGS);
 676                 addr = elf_get_addr(e, v, SH_ADDR);
 677                 offset = elf_get_off(e, v, SH_OFFSET);
 678                 size = elf_get_size(e, v, SH_SIZE);
 679                 shlink = elf_get_word(e, v, SH_LINK);
 680                 info = elf_get_word(e, v, SH_INFO);
 681                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 682                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 683                 fprintf(out, "\n");
 684                 fprintf(out, "entry: %d\n", i);
 685                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 686                 fprintf(out, "\tsh_type: %s\n", sh_types(type));
 687                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 688                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 689                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 690                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 691                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 692                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 693                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 694                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 695         }
 696 }
 697
 698 void
 699 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 700 {
 701         u_int64_t offset;
 702         u_int64_t entsize;
 703         u_int64_t size;
 704         u_int64_t name;
 705         u_int64_t value;
 706         u_int64_t info;
 707         u_int64_t shndx;
 708         void *st;
 709         int len;
 710         int i;
 711
 712         offset = elf_get_off(e, sh, SH_OFFSET);
 713         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 714         size = elf_get_size(e, sh, SH_SIZE);
 715         name = elf_get_word(e, sh, SH_NAME);
 716         len = size / entsize;
 717         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 718         for (i = 0; i < len; i++) {
 719                 st = (char *)e + offset + i * entsize;
 720                 name = elf_get_word(e, st, ST_NAME);
 721                 value = elf_get_addr(e, st, ST_VALUE);
 722                 size = elf_get_size(e, st, ST_SIZE);
 723                 info = elf_get_byte(e, st, ST_INFO);
 724                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 725                 fprintf(out, "\n");
 726                 fprintf(out, "entry: %d\n", i);
 727                 fprintf(out, "\tst_name: %s\n", str + name);
 728                 fprintf(out, "\tst_value: %#jx\n", value);
 729                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 730                 fprintf(out, "\tst_info: %s %s\n",
 731                     st_types[ELF32_ST_TYPE(info)],
 732                     st_bindings[ELF32_ST_BIND(info)]);
 733                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 734         }
 735 }
 736
 737 void
 738 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 739 {
 740         u_int64_t offset;
 741         u_int64_t entsize;
 742         u_int64_t size;
 743         int64_t tag;
 744         u_int64_t ptr;
 745         u_int64_t val;
 746         void *d;
 747         int i;
 748
 749         offset = elf_get_off(e, sh, SH_OFFSET);
 750         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 751         size = elf_get_size(e, sh, SH_SIZE);
 752         fprintf(out, "\ndynamic:\n");
 753         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 754                 d = (char *)e + offset + i * entsize;
 755                 tag = elf_get_size(e, d, D_TAG);
 756                 ptr = elf_get_size(e, d, D_PTR);
 757                 val = elf_get_addr(e, d, D_VAL);
 758                 fprintf(out, "\n");
 759                 fprintf(out, "entry: %d\n", i);
 760                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 761                 switch (tag) {
 762                 case DT_NEEDED:
 763                 case DT_SONAME:
 764                 case DT_RPATH:
 765                         fprintf(out, "\td_val: %s\n", dynstr + val);
 766                         break;
 767                 case DT_PLTRELSZ:
 768                 case DT_RELA:
 769                 case DT_RELASZ:
 770                 case DT_RELAENT:
 771                 case DT_STRSZ:
 772                 case DT_SYMENT:
 773                 case DT_RELSZ:
 774                 case DT_RELENT:
 775                 case DT_PLTREL:
 776                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 777                         break;
 778                 case DT_PLTGOT:
 779                 case DT_HASH:
 780                 case DT_STRTAB:
 781                 case DT_SYMTAB:
 782                 case DT_INIT:
 783                 case DT_FINI:
 784                 case DT_REL:
 785                 case DT_JMPREL:
 786                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 787                         break;
 788                 case DT_NULL:
 789                 case DT_SYMBOLIC:
 790                 case DT_DEBUG:
 791                 case DT_TEXTREL:
 792                         break;
 793                 }
 794         }
 795 }
 796
 797 void
 798 elf_print_rela(Elf32_Ehdr *e, void *sh)
 799 {
 800         u_int64_t offset;
 801         u_int64_t entsize;
 802         u_int64_t size;
 803         u_int64_t name;
 804         u_int64_t info;
 805         int64_t addend;
 806         void *ra;
 807         void *v;
 808         int i;
 809
 810         offset = elf_get_off(e, sh, SH_OFFSET);
 811         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 812         size = elf_get_size(e, sh, SH_SIZE);
 813         name = elf_get_word(e, sh, SH_NAME);
 814         v = (char *)e + offset;
 815         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 816         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 817                 ra = (char *)v + i * entsize;
 818                 offset = elf_get_addr(e, ra, RA_OFFSET);
 819                 info = elf_get_word(e, ra, RA_INFO);
 820                 addend = elf_get_off(e, ra, RA_ADDEND);
 821                 fprintf(out, "\n");
 822                 fprintf(out, "entry: %d\n", i);
 823                 fprintf(out, "\tr_offset: %#jx\n", offset);
 824                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 825                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 826         }
 827 }
 828
 829 void
 830 elf_print_rel(Elf32_Ehdr *e, void *sh)
 831 {
 832         u_int64_t offset;
 833         u_int64_t entsize;
 834         u_int64_t size;
 835         u_int64_t name;
 836         u_int64_t info;
 837         void *r;
 838         void *v;
 839         int i;
 840
 841         offset = elf_get_off(e, sh, SH_OFFSET);
 842         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 843         size = elf_get_size(e, sh, SH_SIZE);
 844         name = elf_get_word(e, sh, SH_NAME);
 845         v = (char *)e + offset;
 846         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
 847         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 848                 r = (char *)v + i * entsize;
 849                 offset = elf_get_addr(e, r, R_OFFSET);
 850                 info = elf_get_word(e, r, R_INFO);
 851                 fprintf(out, "\n");
 852                 fprintf(out, "entry: %d\n", i);
 853                 fprintf(out, "\tr_offset: %#jx\n", offset);
 854                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 855         }
 856 }
 857
 858 void
 859 elf_print_interp(Elf32_Ehdr *e, void *p)
 860 {
 861         u_int64_t offset;
 862         char *s;
 863
 864         offset = elf_get_off(e, p, P_OFFSET);
 865         s = (char *)e + offset;
 866         fprintf(out, "\ninterp:\n");
 867         fprintf(out, "\t%s\n", s);
 868 }
 869
 870 void
 871 elf_print_got(Elf32_Ehdr *e, void *sh)
 872 {
 873         u_int64_t offset;
 874         u_int64_t addralign;
 875         u_int64_t size;
 876         u_int64_t addr;
 877         void *v;
 878         int i;
 879
 880         offset = elf_get_off(e, sh, SH_OFFSET);
 881         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
 882         size = elf_get_size(e, sh, SH_SIZE);
 883         v = (char *)e + offset;
 884         fprintf(out, "\nglobal offset table:\n");
 885         for (i = 0; (u_int64_t)i < size / addralign; i++) {
 886                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
 887                 fprintf(out, "\n");
 888                 fprintf(out, "entry: %d\n", i);
 889                 fprintf(out, "\t%#jx\n", addr);
 890         }
 891 }
 892
 893 void
 894 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
 895 {
 896 }
 897
 898 void
 899 elf_print_note(Elf32_Ehdr *e, void *sh)
 900 {
 901         u_int64_t offset;
 902         u_int64_t size;
 903         u_int64_t name;
 904         u_int32_t namesz;
 905         u_int32_t descsz;
 906         u_int32_t type;
 907         u_int32_t desc;
 908         char *n, *s;
 909
 910         offset = elf_get_off(e, sh, SH_OFFSET);
 911         size = elf_get_size(e, sh, SH_SIZE);
 912         name = elf_get_word(e, sh, SH_NAME);
 913         n = (char *)e + offset;
 914         fprintf(out, "\nnote (%s):\n", shstrtab + name);
 915         while (n < ((char *)e + offset + size)) {
 916                 namesz = elf_get_word(e, n, N_NAMESZ);
 917                 descsz = elf_get_word(e, n, N_DESCSZ);
 918                 type = elf_get_word(e, n, N_TYPE);
 919                 s = n + sizeof(Elf_Note);
 920                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
 921                 fprintf(out, "\t%s %d\n", s, desc);
 922                 n += sizeof(Elf_Note) + namesz + descsz;
 923         }
 924 }
 925
 926 u_int64_t
 927 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
 928 {
 929         u_int64_t val;
 930
 931         val = 0;
 932         switch (e->e_ident[EI_CLASS]) {
 933         case ELFCLASS32:
 934                 val = ((char *)base)[elf32_offsets[member]];
 935                 break;
 936         case ELFCLASS64:
 937                 val = ((char *)base)[elf64_offsets[member]];
 938                 break;
 939         case ELFCLASSNONE:
 940                 errx(1, "invalid class");
 941         }
 942
 943         return val;
 944 }
 945
 946 u_int64_t
 947 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
 948 {
 949         u_int64_t val;
 950
 951         val = 0;
 952         switch (e->e_ident[EI_CLASS]) {
 953         case ELFCLASS32:
 954                 base = (char *)base + elf32_offsets[member];
 955                 switch (e->e_ident[EI_DATA]) {
 956                 case ELFDATA2MSB:
 957                         val = be16dec(base);
 958                         break;
 959                 case ELFDATA2LSB:
 960                         val = le16dec(base);
 961                         break;
 962                 case ELFDATANONE:
 963                         errx(1, "invalid data format");
 964                 }
 965                 break;
 966         case ELFCLASS64:
 967                 base = (char *)base + elf64_offsets[member];
 968                 switch (e->e_ident[EI_DATA]) {
 969                 case ELFDATA2MSB:
 970                         val = be16dec(base);
 971                         break;
 972                 case ELFDATA2LSB:
 973                         val = le16dec(base);
 974                         break;
 975                 case ELFDATANONE:
 976                         errx(1, "invalid data format");
 977                 }
 978                 break;
 979         case ELFCLASSNONE:
 980                 errx(1, "invalid class");
 981         }
 982
 983         return val;
 984 }
 985
 986 u_int64_t
 987 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
 988 {
 989         u_int64_t val;
 990
 991         val = 0;
 992         switch (e->e_ident[EI_CLASS]) {
 993         case ELFCLASS32:
 994                 base = (char *)base + elf32_offsets[member];
 995                 switch (e->e_ident[EI_DATA]) {
 996                 case ELFDATA2MSB:
 997                         val = be16dec(base);
 998                         break;
 999                 case ELFDATA2LSB:
1000                         val = le16dec(base);
1001                         break;
1002                 case ELFDATANONE:
1003                         errx(1, "invalid data format");
1004                 }
1005                 break;
1006         case ELFCLASS64:
1007                 base = (char *)base + elf64_offsets[member];
1008                 switch (e->e_ident[EI_DATA]) {
1009                 case ELFDATA2MSB:
1010                         val = be32dec(base);
1011                         break;
1012                 case ELFDATA2LSB:
1013                         val = le32dec(base);
1014                         break;
1015                 case ELFDATANONE:
1016                         errx(1, "invalid data format");
1017                 }
1018                 break;
1019         case ELFCLASSNONE:
1020                 errx(1, "invalid class");
1021         }
1022
1023         return val;
1024 }
1025
1026 u_int64_t
1027 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1028 {
1029         u_int64_t val;
1030
1031         val = 0;
1032         switch (e->e_ident[EI_CLASS]) {
1033         case ELFCLASS32:
1034                 base = (char *)base + elf32_offsets[member];
1035                 switch (e->e_ident[EI_DATA]) {
1036                 case ELFDATA2MSB:
1037                         val = be32dec(base);
1038                         break;
1039                 case ELFDATA2LSB:
1040                         val = le32dec(base);
1041                         break;
1042                 case ELFDATANONE:
1043                         errx(1, "invalid data format");
1044                 }
1045                 break;
1046         case ELFCLASS64:
1047                 base = (char *)base + elf64_offsets[member];
1048                 switch (e->e_ident[EI_DATA]) {
1049                 case ELFDATA2MSB:
1050                         val = be32dec(base);
1051                         break;
1052                 case ELFDATA2LSB:
1053                         val = le32dec(base);
1054                         break;
1055                 case ELFDATANONE:
1056                         errx(1, "invalid data format");
1057                 }
1058                 break;
1059         case ELFCLASSNONE:
1060                 errx(1, "invalid class");
1061         }
1062
1063         return val;
1064 }
1065
1066 u_int64_t
1067 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1068 {
1069         u_int64_t val;
1070
1071         val = 0;
1072         switch (e->e_ident[EI_CLASS]) {
1073         case ELFCLASS32:
1074                 base = (char *)base + elf32_offsets[member];
1075                 switch (e->e_ident[EI_DATA]) {
1076                 case ELFDATA2MSB:
1077                         val = be32dec(base);
1078                         break;
1079                 case ELFDATA2LSB:
1080                         val = le32dec(base);
1081                         break;
1082                 case ELFDATANONE:
1083                         errx(1, "invalid data format");
1084                 }
1085                 break;
1086         case ELFCLASS64:
1087                 base = (char *)base + elf64_offsets[member];
1088                 switch (e->e_ident[EI_DATA]) {
1089                 case ELFDATA2MSB:
1090                         val = be64dec(base);
1091                         break;
1092                 case ELFDATA2LSB:
1093                         val = le64dec(base);
1094                         break;
1095                 case ELFDATANONE:
1096                         errx(1, "invalid data format");
1097                 }
1098                 break;
1099         case ELFCLASSNONE:
1100                 errx(1, "invalid class");
1101         }
1102
1103         return val;
1104 }
1105
1106 void
1107 usage(void)
1108 {
1109         fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");
1110         exit(1);
1111 }