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 static int elf32_offsets[] = {
  87         0,
  88
  89         offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
  90         offsetof(Elf32_Dyn, d_un.d_val),
  91
  92         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
  93         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
  94         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
  95         offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
  96         offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
  97         offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
  98         offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
  99         offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
 100         offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
 101         offsetof(Elf32_Ehdr, e_shstrndx),
 102
 103         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 104         offsetof(Elf_Note, n_type),
 105
 106         offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
 107         offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
 108         offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
 109         offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
 110
 111         offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
 112         offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
 113         offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
 114         offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
 115         offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
 116
 117         offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
 118         offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
 119         offsetof(Elf32_Sym, st_shndx),
 120
 121         offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
 122
 123         offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
 124         offsetof(Elf32_Rela, r_addend)
 125 };
 126
 127 static int elf64_offsets[] = {
 128         0,
 129
 130         offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
 131         offsetof(Elf64_Dyn, d_un.d_val),
 132
 133         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
 134         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
 135         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
 136         offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
 137         offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
 138         offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
 139         offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
 140         offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
 141         offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
 142         offsetof(Elf64_Ehdr, e_shstrndx),
 143
 144         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 145         offsetof(Elf_Note, n_type),
 146
 147         offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
 148         offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
 149         offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
 150         offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
 151
 152         offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
 153         offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
 154         offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
 155         offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
 156         offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
 157
 158         offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
 159         offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
 160         offsetof(Elf64_Sym, st_shndx),
 161
 162         offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
 163
 164         offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
 165         offsetof(Elf64_Rela, r_addend)
 166 };
 167
 168 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
 169 static const char *
 170 d_tags(u_int64_t tag) {
 171         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_PPC64:  return "EM_PPC64";
 259         case EM_ARM:    return "EM_ARM";
 260         case EM_ALPHA:  return "EM_ALPHA (legacy)";
 261         case EM_SPARCV9:return "EM_SPARCV9";
 262         case EM_IA_64:  return "EM_IA_64";
 263         case EM_X86_64: return "EM_X86_64";
 264         }
 265         snprintf(machdesc, sizeof(machdesc),
 266             "(unknown machine) -- type 0x%x", mach);
 267         return (machdesc);
 268 }
 269
 270 static const char *e_types[] = {
 271         "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
 272 };
 273
 274 static const char *ei_versions[] = {
 275         "EV_NONE", "EV_CURRENT"
 276 };
 277
 278 static const char *ei_classes[] = {
 279         "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
 280 };
 281
 282 static const char *ei_data[] = {
 283         "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
 284 };
 285
 286 static const char *ei_abis[256] = {
 287         "ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
 288         "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
 289         "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
 290         "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
 291         [255] = "ELFOSABI_STANDALONE"
 292 };
 293
 294 static const char *p_types[] = {
 295         "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
 296         "PT_SHLIB", "PT_PHDR", "PT_TLS"
 297 };
 298
 299 static const char *p_flags[] = {
 300         "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
 301         "PF_X|PF_W|PF_R"
 302 };
 303
 304 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
 305 static const char *
 306 sh_types(u_int64_t sht) {
 307         switch (sht) {
 308         case 0: return "SHT_NULL";
 309         case 1: return "SHT_PROGBITS";
 310         case 2: return "SHT_SYMTAB";
 311         case 3: return "SHT_STRTAB";
 312         case 4: return "SHT_RELA";
 313         case 5: return "SHT_HASH";
 314         case 6: return "SHT_DYNAMIC";
 315         case 7: return "SHT_NOTE";
 316         case 8: return "SHT_NOBITS";
 317         case 9: return "SHT_REL";
 318         case 10: return "SHT_SHLIB";
 319         case 11: return "SHT_DYNSYM";
 320         case 14: return "SHT_INIT_ARRAY";
 321         case 15: return "SHT_FINI_ARRAY";
 322         case 16: return "SHT_PREINIT_ARRAY";
 323         case 17: return "SHT_GROUP";
 324         case 18: return "SHT_SYMTAB_SHNDX";
 325         /* 0x60000000 - 0x6fffffff operating system-specific semantics */
 326         case 0x6ffffff0: return "XXX:VERSYM";
 327         case 0x6ffffff4: return "SHT_SUNW_dof";
 328         case 0x6ffffff7: return "SHT_GNU_LIBLIST";
 329         case 0x6ffffffc: return "XXX:VERDEF";
 330         case 0x6ffffffd: return "SHT_SUNW(GNU)_verdef";
 331         case 0x6ffffffe: return "SHT_SUNW(GNU)_verneed";
 332         case 0x6fffffff: return "SHT_SUNW(GNU)_versym";
 333         /* 0x70000000 - 0x7fffffff processor-specific semantics */
 334         case 0x70000000: return "SHT_IA_64_EXT";
 335         case 0x70000001: return "SHT_IA_64_UNWIND";
 336         case 0x7ffffffd: return "XXX:AUXILIARY";
 337         case 0x7fffffff: return "XXX:FILTER";
 338         /* 0x80000000 - 0xffffffff application programs */
 339         default: return "ERROR: SHT NOT DEFINED";
 340         }
 341 }
 342
 343 static const char *sh_flags[] = {
 344         "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
 345         "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
 346         "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
 347 };
 348
 349 static const char *st_types[] = {
 350         "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE"
 351 };
 352
 353 static const char *st_bindings[] = {
 354         "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
 355 };
 356
 357 static char *dynstr;
 358 static char *shstrtab;
 359 static char *strtab;
 360 static FILE *out;
 361
 362 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
 363 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
 364     elf_member_t member);
 365 #if 0
 366 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
 367 #endif
 368 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
 369 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
 370
 371 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
 372 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
 373 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
 374 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
 375 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
 376 static void elf_print_rel(Elf32_Ehdr *e, void *r);
 377 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
 378 static void elf_print_interp(Elf32_Ehdr *e, void *p);
 379 static void elf_print_got(Elf32_Ehdr *e, void *sh);
 380 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
 381 static void elf_print_note(Elf32_Ehdr *e, void *sh);
 382
 383 static void usage(void);
 384
 385 /*
 386  * Helpers for ELF files with shnum or shstrndx values that don't fit in the
 387  * ELF header.  If the values are too large then an escape value is used to
 388  * indicate that the actual value is found in one of section 0's fields.
 389  */
 390 static uint64_t
 391 elf_get_shnum(Elf32_Ehdr *e, void *sh)
 392 {
 393         uint64_t shnum;
 394
 395         shnum = elf_get_quarter(e, e, E_SHNUM);
 396         if (shnum == 0)
 397                 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
 398         return shnum;
 399 }
 400
 401 static uint64_t
 402 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
 403 {
 404         uint64_t shstrndx;
 405
 406         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 407         if (shstrndx == SHN_XINDEX)
 408                 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
 409         return shstrndx;
 410 }
 411
 412 int
 413 main(int ac, char **av)
 414 {
 415         u_int64_t phoff;
 416         u_int64_t shoff;
 417         u_int64_t phentsize;
 418         u_int64_t phnum;
 419         u_int64_t shentsize;
 420         u_int64_t shnum;
 421         u_int64_t shstrndx;
 422         u_int64_t offset;
 423         u_int64_t name;
 424         u_int64_t type;
 425         struct stat sb;
 426         u_int flags;
 427         Elf32_Ehdr *e;
 428         void *p;
 429         void *sh;
 430         void *v;
 431         int fd;
 432         int ch;
 433         int i;
 434
 435         out = stdout;
 436         flags = 0;
 437         while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
 438                 switch (ch) {
 439                 case 'a':
 440                         flags = ED_ALL;
 441                         break;
 442                 case 'c':
 443                         flags |= ED_SHDR;
 444                         break;
 445                 case 'd':
 446                         flags |= ED_DYN;
 447                         break;
 448                 case 'e':
 449                         flags |= ED_EHDR;
 450                         break;
 451                 case 'i':
 452                         flags |= ED_INTERP;
 453                         break;
 454                 case 'G':
 455                         flags |= ED_GOT;
 456                         break;
 457                 case 'h':
 458                         flags |= ED_HASH;
 459                         break;
 460                 case 'n':
 461                         flags |= ED_NOTE;
 462                         break;
 463                 case 'p':
 464                         flags |= ED_PHDR;
 465                         break;
 466                 case 'r':
 467                         flags |= ED_REL;
 468                         break;
 469                 case 's':
 470                         flags |= ED_SYMTAB;
 471                         break;
 472                 case 'w':
 473                         if ((out = fopen(optarg, "w")) == NULL)
 474                                 err(1, "%s", optarg);
 475                         break;
 476                 case '?':
 477                 default:
 478                         usage();
 479                 }
 480         ac -= optind;
 481         av += optind;
 482         if (ac == 0 || flags == 0)
 483                 usage();
 484         if ((fd = open(*av, O_RDONLY)) < 0 ||
 485             fstat(fd, &sb) < 0)
 486                 err(1, "%s", *av);
 487         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 488         if (e == MAP_FAILED)
 489                 err(1, NULL);
 490         if (!IS_ELF(*(Elf32_Ehdr *)e))
 491                 errx(1, "not an elf file");
 492         phoff = elf_get_off(e, e, E_PHOFF);
 493         shoff = elf_get_off(e, e, E_SHOFF);
 494         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 495         phnum = elf_get_quarter(e, e, E_PHNUM);
 496         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 497         p = (char *)e + phoff;
 498         if (shoff > 0) {
 499                 sh = (char *)e + shoff;
 500                 shnum = elf_get_shnum(e, sh);
 501                 shstrndx = elf_get_shstrndx(e, sh);
 502                 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
 503                     SH_OFFSET);
 504                 shstrtab = (char *)e + offset;
 505         } else {
 506                 sh = NULL;
 507                 shnum = 0;
 508                 shstrndx = 0;
 509                 shstrtab = NULL;
 510         }
 511         for (i = 0; (u_int64_t)i < shnum; i++) {
 512                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 513                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 514                 if (strcmp(shstrtab + name, ".strtab") == 0)
 515                         strtab = (char *)e + offset;
 516                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 517                         dynstr = (char *)e + offset;
 518         }
 519         if (flags & ED_EHDR)
 520                 elf_print_ehdr(e, sh);
 521         if (flags & ED_PHDR)
 522                 elf_print_phdr(e, p);
 523         if (flags & ED_SHDR)
 524                 elf_print_shdr(e, sh);
 525         for (i = 0; (u_int64_t)i < phnum; i++) {
 526                 v = (char *)p + i * phentsize;
 527                 type = elf_get_word(e, v, P_TYPE);
 528                 switch (type) {
 529                 case PT_INTERP:
 530                         if (flags & ED_INTERP)
 531                                 elf_print_interp(e, v);
 532                         break;
 533                 case PT_NULL:
 534                 case PT_LOAD:
 535                 case PT_DYNAMIC:
 536                 case PT_NOTE:
 537                 case PT_SHLIB:
 538                 case PT_PHDR:
 539                         break;
 540                 }
 541         }
 542         for (i = 0; (u_int64_t)i < shnum; i++) {
 543                 v = (char *)sh + i * shentsize;
 544                 type = elf_get_word(e, v, SH_TYPE);
 545                 switch (type) {
 546                 case SHT_SYMTAB:
 547                         if (flags & ED_SYMTAB)
 548                                 elf_print_symtab(e, v, strtab);
 549                         break;
 550                 case SHT_DYNAMIC:
 551                         if (flags & ED_DYN)
 552                                 elf_print_dynamic(e, v);
 553                         break;
 554                 case SHT_RELA:
 555                         if (flags & ED_REL)
 556                                 elf_print_rela(e, v);
 557                         break;
 558                 case SHT_REL:
 559                         if (flags & ED_REL)
 560                                 elf_print_rel(e, v);
 561                         break;
 562                 case SHT_NOTE:
 563                         name = elf_get_word(e, v, SH_NAME);
 564                         if (flags & ED_NOTE &&
 565                             strcmp(shstrtab + name, ".note.ABI-tag") == 0)
 566                                 elf_print_note(e, v);
 567                         break;
 568                 case SHT_DYNSYM:
 569                         if (flags & ED_SYMTAB)
 570                                 elf_print_symtab(e, v, dynstr);
 571                         break;
 572                 case SHT_PROGBITS:
 573                         name = elf_get_word(e, v, SH_NAME);
 574                         if (flags & ED_GOT &&
 575                             strcmp(shstrtab + name, ".got") == 0)
 576                                 elf_print_got(e, v);
 577                         break;
 578                 case SHT_HASH:
 579                         if (flags & ED_HASH)
 580                                 elf_print_hash(e, v);
 581                         break;
 582                 case SHT_NULL:
 583                 case SHT_STRTAB:
 584                 case SHT_NOBITS:
 585                 case SHT_SHLIB:
 586                         break;
 587                 }
 588         }
 589
 590         return 0;
 591 }
 592
 593 static void
 594 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
 595 {
 596         u_int64_t class;
 597         u_int64_t data;
 598         u_int64_t osabi;
 599         u_int64_t type;
 600         u_int64_t machine;
 601         u_int64_t version;
 602         u_int64_t entry;
 603         u_int64_t phoff;
 604         u_int64_t shoff;
 605         u_int64_t flags;
 606         u_int64_t ehsize;
 607         u_int64_t phentsize;
 608         u_int64_t phnum;
 609         u_int64_t shentsize;
 610         u_int64_t shnum;
 611         u_int64_t shstrndx;
 612
 613         class = elf_get_byte(e, e, E_CLASS);
 614         data = elf_get_byte(e, e, E_DATA);
 615         osabi = elf_get_byte(e, e, E_OSABI);
 616         type = elf_get_quarter(e, e, E_TYPE);
 617         machine = elf_get_quarter(e, e, E_MACHINE);
 618         version = elf_get_word(e, e, E_VERSION);
 619         entry = elf_get_addr(e, e, E_ENTRY);
 620         phoff = elf_get_off(e, e, E_PHOFF);
 621         shoff = elf_get_off(e, e, E_SHOFF);
 622         flags = elf_get_word(e, e, E_FLAGS);
 623         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 624         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 625         phnum = elf_get_quarter(e, e, E_PHNUM);
 626         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 627         fprintf(out, "\nelf header:\n");
 628         fprintf(out, "\n");
 629         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 630             ei_abis[osabi]);
 631         fprintf(out, "\te_type: %s\n", e_types[type]);
 632         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 633         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 634         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 635         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 636         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 637         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 638         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 639         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 640         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 641         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 642         if (sh != NULL) {
 643                 shnum = elf_get_shnum(e, sh);
 644                 shstrndx = elf_get_shstrndx(e, sh);
 645                 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 646                 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 647         }
 648 }
 649
 650 static void
 651 elf_print_phdr(Elf32_Ehdr *e, void *p)
 652 {
 653         u_int64_t phentsize;
 654         u_int64_t phnum;
 655         u_int64_t type;
 656         u_int64_t offset;
 657         u_int64_t vaddr;
 658         u_int64_t paddr;
 659         u_int64_t filesz;
 660         u_int64_t memsz;
 661         u_int64_t flags;
 662         u_int64_t align;
 663         void *v;
 664         int i;
 665
 666         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 667         phnum = elf_get_quarter(e, e, E_PHNUM);
 668         fprintf(out, "\nprogram header:\n");
 669         for (i = 0; (u_int64_t)i < phnum; i++) {
 670                 v = (char *)p + i * phentsize;
 671                 type = elf_get_word(e, v, P_TYPE);
 672                 offset = elf_get_off(e, v, P_OFFSET);
 673                 vaddr = elf_get_addr(e, v, P_VADDR);
 674                 paddr = elf_get_addr(e, v, P_PADDR);
 675                 filesz = elf_get_size(e, v, P_FILESZ);
 676                 memsz = elf_get_size(e, v, P_MEMSZ);
 677                 flags = elf_get_word(e, v, P_FLAGS);
 678                 align = elf_get_size(e, v, P_ALIGN);
 679                 fprintf(out, "\n");
 680                 fprintf(out, "entry: %d\n", i);
 681                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 682                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 683                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 684                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 685                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 686                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 687                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 688                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 689         }
 690 }
 691
 692 static void
 693 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 694 {
 695         u_int64_t shentsize;
 696         u_int64_t shnum;
 697         u_int64_t name;
 698         u_int64_t type;
 699         u_int64_t flags;
 700         u_int64_t addr;
 701         u_int64_t offset;
 702         u_int64_t size;
 703         u_int64_t shlink;
 704         u_int64_t info;
 705         u_int64_t addralign;
 706         u_int64_t entsize;
 707         void *v;
 708         int i;
 709
 710         if (sh == NULL) {
 711                 fprintf(out, "\nNo section headers\n");
 712                 return;
 713         }
 714
 715         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 716         shnum = elf_get_shnum(e, sh);
 717         fprintf(out, "\nsection header:\n");
 718         for (i = 0; (u_int64_t)i < shnum; i++) {
 719                 v = (char *)sh + i * shentsize;
 720                 name = elf_get_word(e, v, SH_NAME);
 721                 type = elf_get_word(e, v, SH_TYPE);
 722                 flags = elf_get_word(e, v, SH_FLAGS);
 723                 addr = elf_get_addr(e, v, SH_ADDR);
 724                 offset = elf_get_off(e, v, SH_OFFSET);
 725                 size = elf_get_size(e, v, SH_SIZE);
 726                 shlink = elf_get_word(e, v, SH_LINK);
 727                 info = elf_get_word(e, v, SH_INFO);
 728                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 729                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 730                 fprintf(out, "\n");
 731                 fprintf(out, "entry: %d\n", i);
 732                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 733                 fprintf(out, "\tsh_type: %s\n", sh_types(type));
 734                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 735                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 736                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 737                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 738                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 739                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 740                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 741                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 742         }
 743 }
 744
 745 static void
 746 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 747 {
 748         u_int64_t offset;
 749         u_int64_t entsize;
 750         u_int64_t size;
 751         u_int64_t name;
 752         u_int64_t value;
 753         u_int64_t info;
 754         u_int64_t shndx;
 755         void *st;
 756         int len;
 757         int i;
 758
 759         offset = elf_get_off(e, sh, SH_OFFSET);
 760         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 761         size = elf_get_size(e, sh, SH_SIZE);
 762         name = elf_get_word(e, sh, SH_NAME);
 763         len = size / entsize;
 764         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 765         for (i = 0; i < len; i++) {
 766                 st = (char *)e + offset + i * entsize;
 767                 name = elf_get_word(e, st, ST_NAME);
 768                 value = elf_get_addr(e, st, ST_VALUE);
 769                 size = elf_get_size(e, st, ST_SIZE);
 770                 info = elf_get_byte(e, st, ST_INFO);
 771                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 772                 fprintf(out, "\n");
 773                 fprintf(out, "entry: %d\n", i);
 774                 fprintf(out, "\tst_name: %s\n", str + name);
 775                 fprintf(out, "\tst_value: %#jx\n", value);
 776                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 777                 fprintf(out, "\tst_info: %s %s\n",
 778                     st_types[ELF32_ST_TYPE(info)],
 779                     st_bindings[ELF32_ST_BIND(info)]);
 780                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 781         }
 782 }
 783
 784 static void
 785 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 786 {
 787         u_int64_t offset;
 788         u_int64_t entsize;
 789         u_int64_t size;
 790         int64_t tag;
 791         u_int64_t ptr;
 792         u_int64_t val;
 793         void *d;
 794         int i;
 795
 796         offset = elf_get_off(e, sh, SH_OFFSET);
 797         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 798         size = elf_get_size(e, sh, SH_SIZE);
 799         fprintf(out, "\ndynamic:\n");
 800         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 801                 d = (char *)e + offset + i * entsize;
 802                 tag = elf_get_size(e, d, D_TAG);
 803                 ptr = elf_get_size(e, d, D_PTR);
 804                 val = elf_get_addr(e, d, D_VAL);
 805                 fprintf(out, "\n");
 806                 fprintf(out, "entry: %d\n", i);
 807                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 808                 switch (tag) {
 809                 case DT_NEEDED:
 810                 case DT_SONAME:
 811                 case DT_RPATH:
 812                         fprintf(out, "\td_val: %s\n", dynstr + val);
 813                         break;
 814                 case DT_PLTRELSZ:
 815                 case DT_RELA:
 816                 case DT_RELASZ:
 817                 case DT_RELAENT:
 818                 case DT_STRSZ:
 819                 case DT_SYMENT:
 820                 case DT_RELSZ:
 821                 case DT_RELENT:
 822                 case DT_PLTREL:
 823                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 824                         break;
 825                 case DT_PLTGOT:
 826                 case DT_HASH:
 827                 case DT_STRTAB:
 828                 case DT_SYMTAB:
 829                 case DT_INIT:
 830                 case DT_FINI:
 831                 case DT_REL:
 832                 case DT_JMPREL:
 833                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 834                         break;
 835                 case DT_NULL:
 836                 case DT_SYMBOLIC:
 837                 case DT_DEBUG:
 838                 case DT_TEXTREL:
 839                         break;
 840                 }
 841         }
 842 }
 843
 844 static void
 845 elf_print_rela(Elf32_Ehdr *e, void *sh)
 846 {
 847         u_int64_t offset;
 848         u_int64_t entsize;
 849         u_int64_t size;
 850         u_int64_t name;
 851         u_int64_t info;
 852         int64_t addend;
 853         void *ra;
 854         void *v;
 855         int i;
 856
 857         offset = elf_get_off(e, sh, SH_OFFSET);
 858         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 859         size = elf_get_size(e, sh, SH_SIZE);
 860         name = elf_get_word(e, sh, SH_NAME);
 861         v = (char *)e + offset;
 862         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 863         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 864                 ra = (char *)v + i * entsize;
 865                 offset = elf_get_addr(e, ra, RA_OFFSET);
 866                 info = elf_get_word(e, ra, RA_INFO);
 867                 addend = elf_get_off(e, ra, RA_ADDEND);
 868                 fprintf(out, "\n");
 869                 fprintf(out, "entry: %d\n", i);
 870                 fprintf(out, "\tr_offset: %#jx\n", offset);
 871                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 872                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 873         }
 874 }
 875
 876 static void
 877 elf_print_rel(Elf32_Ehdr *e, void *sh)
 878 {
 879         u_int64_t offset;
 880         u_int64_t entsize;
 881         u_int64_t size;
 882         u_int64_t name;
 883         u_int64_t info;
 884         void *r;
 885         void *v;
 886         int i;
 887
 888         offset = elf_get_off(e, sh, SH_OFFSET);
 889         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 890         size = elf_get_size(e, sh, SH_SIZE);
 891         name = elf_get_word(e, sh, SH_NAME);
 892         v = (char *)e + offset;
 893         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
 894         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 895                 r = (char *)v + i * entsize;
 896                 offset = elf_get_addr(e, r, R_OFFSET);
 897                 info = elf_get_word(e, r, R_INFO);
 898                 fprintf(out, "\n");
 899                 fprintf(out, "entry: %d\n", i);
 900                 fprintf(out, "\tr_offset: %#jx\n", offset);
 901                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 902         }
 903 }
 904
 905 static void
 906 elf_print_interp(Elf32_Ehdr *e, void *p)
 907 {
 908         u_int64_t offset;
 909         char *s;
 910
 911         offset = elf_get_off(e, p, P_OFFSET);
 912         s = (char *)e + offset;
 913         fprintf(out, "\ninterp:\n");
 914         fprintf(out, "\t%s\n", s);
 915 }
 916
 917 static void
 918 elf_print_got(Elf32_Ehdr *e, void *sh)
 919 {
 920         u_int64_t offset;
 921         u_int64_t addralign;
 922         u_int64_t size;
 923         u_int64_t addr;
 924         void *v;
 925         int i;
 926
 927         offset = elf_get_off(e, sh, SH_OFFSET);
 928         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
 929         size = elf_get_size(e, sh, SH_SIZE);
 930         v = (char *)e + offset;
 931         fprintf(out, "\nglobal offset table:\n");
 932         for (i = 0; (u_int64_t)i < size / addralign; i++) {
 933                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
 934                 fprintf(out, "\n");
 935                 fprintf(out, "entry: %d\n", i);
 936                 fprintf(out, "\t%#jx\n", addr);
 937         }
 938 }
 939
 940 static void
 941 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
 942 {
 943 }
 944
 945 static void
 946 elf_print_note(Elf32_Ehdr *e, void *sh)
 947 {
 948         u_int64_t offset;
 949         u_int64_t size;
 950         u_int64_t name;
 951         u_int32_t namesz;
 952         u_int32_t descsz;
 953         u_int32_t desc;
 954         char *n, *s;
 955
 956         offset = elf_get_off(e, sh, SH_OFFSET);
 957         size = elf_get_size(e, sh, SH_SIZE);
 958         name = elf_get_word(e, sh, SH_NAME);
 959         n = (char *)e + offset;
 960         fprintf(out, "\nnote (%s):\n", shstrtab + name);
 961         while (n < ((char *)e + offset + size)) {
 962                 namesz = elf_get_word(e, n, N_NAMESZ);
 963                 descsz = elf_get_word(e, n, N_DESCSZ);
 964                 s = n + sizeof(Elf_Note);
 965                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
 966                 fprintf(out, "\t%s %d\n", s, desc);
 967                 n += sizeof(Elf_Note) + namesz + descsz;
 968         }
 969 }
 970
 971 static u_int64_t
 972 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
 973 {
 974         u_int64_t val;
 975
 976         val = 0;
 977         switch (e->e_ident[EI_CLASS]) {
 978         case ELFCLASS32:
 979                 val = ((uint8_t *)base)[elf32_offsets[member]];
 980                 break;
 981         case ELFCLASS64:
 982                 val = ((uint8_t *)base)[elf64_offsets[member]];
 983                 break;
 984         case ELFCLASSNONE:
 985                 errx(1, "invalid class");
 986         }
 987
 988         return val;
 989 }
 990
 991 static u_int64_t
 992 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
 993 {
 994         u_int64_t val;
 995
 996         val = 0;
 997         switch (e->e_ident[EI_CLASS]) {
 998         case ELFCLASS32:
 999                 base = (char *)base + elf32_offsets[member];
1000                 switch (e->e_ident[EI_DATA]) {
1001                 case ELFDATA2MSB:
1002                         val = be16dec(base);
1003                         break;
1004                 case ELFDATA2LSB:
1005                         val = le16dec(base);
1006                         break;
1007                 case ELFDATANONE:
1008                         errx(1, "invalid data format");
1009                 }
1010                 break;
1011         case ELFCLASS64:
1012                 base = (char *)base + elf64_offsets[member];
1013                 switch (e->e_ident[EI_DATA]) {
1014                 case ELFDATA2MSB:
1015                         val = be16dec(base);
1016                         break;
1017                 case ELFDATA2LSB:
1018                         val = le16dec(base);
1019                         break;
1020                 case ELFDATANONE:
1021                         errx(1, "invalid data format");
1022                 }
1023                 break;
1024         case ELFCLASSNONE:
1025                 errx(1, "invalid class");
1026         }
1027
1028         return val;
1029 }
1030
1031 #if 0
1032 static u_int64_t
1033 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1034 {
1035         u_int64_t val;
1036
1037         val = 0;
1038         switch (e->e_ident[EI_CLASS]) {
1039         case ELFCLASS32:
1040                 base = (char *)base + elf32_offsets[member];
1041                 switch (e->e_ident[EI_DATA]) {
1042                 case ELFDATA2MSB:
1043                         val = be16dec(base);
1044                         break;
1045                 case ELFDATA2LSB:
1046                         val = le16dec(base);
1047                         break;
1048                 case ELFDATANONE:
1049                         errx(1, "invalid data format");
1050                 }
1051                 break;
1052         case ELFCLASS64:
1053                 base = (char *)base + elf64_offsets[member];
1054                 switch (e->e_ident[EI_DATA]) {
1055                 case ELFDATA2MSB:
1056                         val = be32dec(base);
1057                         break;
1058                 case ELFDATA2LSB:
1059                         val = le32dec(base);
1060                         break;
1061                 case ELFDATANONE:
1062                         errx(1, "invalid data format");
1063                 }
1064                 break;
1065         case ELFCLASSNONE:
1066                 errx(1, "invalid class");
1067         }
1068
1069         return val;
1070 }
1071 #endif
1072
1073 static u_int64_t
1074 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1075 {
1076         u_int64_t val;
1077
1078         val = 0;
1079         switch (e->e_ident[EI_CLASS]) {
1080         case ELFCLASS32:
1081                 base = (char *)base + elf32_offsets[member];
1082                 switch (e->e_ident[EI_DATA]) {
1083                 case ELFDATA2MSB:
1084                         val = be32dec(base);
1085                         break;
1086                 case ELFDATA2LSB:
1087                         val = le32dec(base);
1088                         break;
1089                 case ELFDATANONE:
1090                         errx(1, "invalid data format");
1091                 }
1092                 break;
1093         case ELFCLASS64:
1094                 base = (char *)base + elf64_offsets[member];
1095                 switch (e->e_ident[EI_DATA]) {
1096                 case ELFDATA2MSB:
1097                         val = be32dec(base);
1098                         break;
1099                 case ELFDATA2LSB:
1100                         val = le32dec(base);
1101                         break;
1102                 case ELFDATANONE:
1103                         errx(1, "invalid data format");
1104                 }
1105                 break;
1106         case ELFCLASSNONE:
1107                 errx(1, "invalid class");
1108         }
1109
1110         return val;
1111 }
1112
1113 static u_int64_t
1114 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1115 {
1116         u_int64_t val;
1117
1118         val = 0;
1119         switch (e->e_ident[EI_CLASS]) {
1120         case ELFCLASS32:
1121                 base = (char *)base + elf32_offsets[member];
1122                 switch (e->e_ident[EI_DATA]) {
1123                 case ELFDATA2MSB:
1124                         val = be32dec(base);
1125                         break;
1126                 case ELFDATA2LSB:
1127                         val = le32dec(base);
1128                         break;
1129                 case ELFDATANONE:
1130                         errx(1, "invalid data format");
1131                 }
1132                 break;
1133         case ELFCLASS64:
1134                 base = (char *)base + elf64_offsets[member];
1135                 switch (e->e_ident[EI_DATA]) {
1136                 case ELFDATA2MSB:
1137                         val = be64dec(base);
1138                         break;
1139                 case ELFDATA2LSB:
1140                         val = le64dec(base);
1141                         break;
1142                 case ELFDATANONE:
1143                         errx(1, "invalid data format");
1144                 }
1145                 break;
1146         case ELFCLASSNONE:
1147                 errx(1, "invalid class");
1148         }
1149
1150         return val;
1151 }
1152
1153 static void
1154 usage(void)
1155 {
1156         fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");
1157         exit(1);
1158 }