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
  33 #include <sys/capability.h>
  34 #include <sys/elf32.h>
  35 #include <sys/elf64.h>
  36 #include <sys/endian.h>
  37 #include <sys/mman.h>
  38 #include <sys/stat.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <inttypes.h>
  43 #include <stddef.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <unistd.h>
  48
  49 #define ED_DYN          (1<<0)
  50 #define ED_EHDR         (1<<1)
  51 #define ED_GOT          (1<<2)
  52 #define ED_HASH         (1<<3)
  53 #define ED_INTERP       (1<<4)
  54 #define ED_NOTE         (1<<5)
  55 #define ED_PHDR         (1<<6)
  56 #define ED_REL          (1<<7)
  57 #define ED_SHDR         (1<<8)
  58 #define ED_SYMTAB       (1<<9)
  59 #define ED_ALL          ((1<<10)-1)
  60
  61 #define elf_get_addr    elf_get_quad
  62 #define elf_get_off     elf_get_quad
  63 #define elf_get_size    elf_get_quad
  64
  65 enum elf_member {
  66         D_TAG = 1, D_PTR, D_VAL,
  67
  68         E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
  69         E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
  70         E_SHNUM, E_SHSTRNDX,
  71
  72         N_NAMESZ, N_DESCSZ, N_TYPE,
  73
  74         P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
  75         P_ALIGN,
  76
  77         SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
  78         SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
  79
  80         ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
  81
  82         R_OFFSET, R_INFO,
  83
  84         RA_OFFSET, RA_INFO, RA_ADDEND
  85 };
  86
  87 typedef enum elf_member elf_member_t;
  88
  89 static int elf32_offsets[] = {
  90         0,
  91
  92         offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
  93         offsetof(Elf32_Dyn, d_un.d_val),
  94
  95         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
  96         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
  97         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
  98         offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
  99         offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
 100         offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
 101         offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
 102         offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
 103         offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
 104         offsetof(Elf32_Ehdr, e_shstrndx),
 105
 106         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 107         offsetof(Elf_Note, n_type),
 108
 109         offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
 110         offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
 111         offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
 112         offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
 113
 114         offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
 115         offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
 116         offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
 117         offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
 118         offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
 119
 120         offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
 121         offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
 122         offsetof(Elf32_Sym, st_shndx),
 123
 124         offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
 125
 126         offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
 127         offsetof(Elf32_Rela, r_addend)
 128 };
 129
 130 static int elf64_offsets[] = {
 131         0,
 132
 133         offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
 134         offsetof(Elf64_Dyn, d_un.d_val),
 135
 136         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
 137         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
 138         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
 139         offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
 140         offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
 141         offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
 142         offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
 143         offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
 144         offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
 145         offsetof(Elf64_Ehdr, e_shstrndx),
 146
 147         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 148         offsetof(Elf_Note, n_type),
 149
 150         offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
 151         offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
 152         offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
 153         offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
 154
 155         offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
 156         offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
 157         offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
 158         offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
 159         offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
 160
 161         offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
 162         offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
 163         offsetof(Elf64_Sym, st_shndx),
 164
 165         offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
 166
 167         offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
 168         offsetof(Elf64_Rela, r_addend)
 169 };
 170
 171 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
 172 static const char *
 173 d_tags(u_int64_t tag)
 174 {
 175         static char unknown_tag[48];
 176
 177         switch (tag) {
 178         case DT_NULL:           return "DT_NULL";
 179         case DT_NEEDED:         return "DT_NEEDED";
 180         case DT_PLTRELSZ:       return "DT_PLTRELSZ";
 181         case DT_PLTGOT:         return "DT_PLTGOT";
 182         case DT_HASH:           return "DT_HASH";
 183         case DT_STRTAB:         return "DT_STRTAB";
 184         case DT_SYMTAB:         return "DT_SYMTAB";
 185         case DT_RELA:           return "DT_RELA";
 186         case DT_RELASZ:         return "DT_RELASZ";
 187         case DT_RELAENT:        return "DT_RELAENT";
 188         case DT_STRSZ:          return "DT_STRSZ";
 189         case DT_SYMENT:         return "DT_SYMENT";
 190         case DT_INIT:           return "DT_INIT";
 191         case DT_FINI:           return "DT_FINI";
 192         case DT_SONAME:         return "DT_SONAME";
 193         case DT_RPATH:          return "DT_RPATH";
 194         case DT_SYMBOLIC:       return "DT_SYMBOLIC";
 195         case DT_REL:            return "DT_REL";
 196         case DT_RELSZ:          return "DT_RELSZ";
 197         case DT_RELENT:         return "DT_RELENT";
 198         case DT_PLTREL:         return "DT_PLTREL";
 199         case DT_DEBUG:          return "DT_DEBUG";
 200         case DT_TEXTREL:        return "DT_TEXTREL";
 201         case DT_JMPREL:         return "DT_JMPREL";
 202         case DT_BIND_NOW:       return "DT_BIND_NOW";
 203         case DT_INIT_ARRAY:     return "DT_INIT_ARRAY";
 204         case DT_FINI_ARRAY:     return "DT_FINI_ARRAY";
 205         case DT_INIT_ARRAYSZ:   return "DT_INIT_ARRAYSZ";
 206         case DT_FINI_ARRAYSZ:   return "DT_FINI_ARRAYSZ";
 207         case DT_RUNPATH:        return "DT_RUNPATH";
 208         case DT_FLAGS:          return "DT_FLAGS";
 209         case DT_PREINIT_ARRAY:  return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */
 210         case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ";
 211         /* 0x6000000D - 0x6ffff000 operating system-specific semantics */
 212         case 0x6ffffdf5:        return "DT_GNU_PRELINKED";
 213         case 0x6ffffdf6:        return "DT_GNU_CONFLICTSZ";
 214         case 0x6ffffdf7:        return "DT_GNU_LIBLISTSZ";
 215         case 0x6ffffdf8:        return "DT_SUNW_CHECKSUM";
 216         case DT_PLTPADSZ:       return "DT_PLTPADSZ";
 217         case DT_MOVEENT:        return "DT_MOVEENT";
 218         case DT_MOVESZ:         return "DT_MOVESZ";
 219         case DT_FEATURE:        return "DT_FEATURE";
 220         case DT_POSFLAG_1:      return "DT_POSFLAG_1";
 221         case DT_SYMINSZ:        return "DT_SYMINSZ";
 222         case DT_SYMINENT :      return "DT_SYMINENT (DT_VALRNGHI)";
 223         case DT_ADDRRNGLO:      return "DT_ADDRRNGLO";
 224         case DT_GNU_HASH:       return "DT_GNU_HASH";
 225         case 0x6ffffef8:        return "DT_GNU_CONFLICT";
 226         case 0x6ffffef9:        return "DT_GNU_LIBLIST";
 227         case DT_CONFIG:         return "DT_CONFIG";
 228         case DT_DEPAUDIT:       return "DT_DEPAUDIT";
 229         case DT_AUDIT:          return "DT_AUDIT";
 230         case DT_PLTPAD:         return "DT_PLTPAD";
 231         case DT_MOVETAB:        return "DT_MOVETAB";
 232         case DT_SYMINFO :       return "DT_SYMINFO (DT_ADDRRNGHI)";
 233         case DT_RELACOUNT:      return "DT_RELACOUNT";
 234         case DT_RELCOUNT:       return "DT_RELCOUNT";
 235         case DT_FLAGS_1:        return "DT_FLAGS_1";
 236         case DT_VERDEF:         return "DT_VERDEF";
 237         case DT_VERDEFNUM:      return "DT_VERDEFNUM";
 238         case DT_VERNEED:        return "DT_VERNEED";
 239         case DT_VERNEEDNUM:     return "DT_VERNEEDNUM";
 240         case 0x6ffffff0:        return "DT_GNU_VERSYM";
 241         /* 0x70000000 - 0x7fffffff processor-specific semantics */
 242         case 0x70000000:        return "DT_IA_64_PLT_RESERVE";
 243         case 0x7ffffffd:        return "DT_SUNW_AUXILIARY";
 244         case 0x7ffffffe:        return "DT_SUNW_USED";
 245         case 0x7fffffff:        return "DT_SUNW_FILTER";
 246         }
 247         snprintf(unknown_tag, sizeof(unknown_tag),
 248                 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag);
 249         return (unknown_tag);
 250 }
 251
 252 static const char *
 253 e_machines(u_int mach)
 254 {
 255         static char machdesc[64];
 256
 257         switch (mach) {
 258         case EM_NONE:   return "EM_NONE";
 259         case EM_M32:    return "EM_M32";
 260         case EM_SPARC:  return "EM_SPARC";
 261         case EM_386:    return "EM_386";
 262         case EM_68K:    return "EM_68K";
 263         case EM_88K:    return "EM_88K";
 264         case EM_860:    return "EM_860";
 265         case EM_MIPS:   return "EM_MIPS";
 266         case EM_PPC:    return "EM_PPC";
 267         case EM_PPC64:  return "EM_PPC64";
 268         case EM_ARM:    return "EM_ARM";
 269         case EM_ALPHA:  return "EM_ALPHA (legacy)";
 270         case EM_SPARCV9:return "EM_SPARCV9";
 271         case EM_IA_64:  return "EM_IA_64";
 272         case EM_X86_64: return "EM_X86_64";
 273         case EM_AARCH64:return "EM_AARCH64";
 274         }
 275         snprintf(machdesc, sizeof(machdesc),
 276             "(unknown machine) -- type 0x%x", mach);
 277         return (machdesc);
 278 }
 279
 280 static const char *e_types[] = {
 281         "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
 282 };
 283
 284 static const char *ei_versions[] = {
 285         "EV_NONE", "EV_CURRENT"
 286 };
 287
 288 static const char *ei_classes[] = {
 289         "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
 290 };
 291
 292 static const char *ei_data[] = {
 293         "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
 294 };
 295
 296 static const char *ei_abis[256] = {
 297         "ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
 298         "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
 299         "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
 300         "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
 301         [255] = "ELFOSABI_STANDALONE"
 302 };
 303
 304 static const char *p_types[] = {
 305         "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
 306         "PT_SHLIB", "PT_PHDR", "PT_TLS"
 307 };
 308
 309 static const char *p_flags[] = {
 310         "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
 311         "PF_X|PF_W|PF_R"
 312 };
 313
 314 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
 315 static const char *
 316 sh_types(uint64_t machine, uint64_t sht) {
 317         static char unknown_buf[64];
 318
 319         if (sht < 0x60000000) {
 320                 switch (sht) {
 321                 case SHT_NULL:          return "SHT_NULL";
 322                 case SHT_PROGBITS:      return "SHT_PROGBITS";
 323                 case SHT_SYMTAB:        return "SHT_SYMTAB";
 324                 case SHT_STRTAB:        return "SHT_STRTAB";
 325                 case SHT_RELA:          return "SHT_RELA";
 326                 case SHT_HASH:          return "SHT_HASH";
 327                 case SHT_DYNAMIC:       return "SHT_DYNAMIC";
 328                 case SHT_NOTE:          return "SHT_NOTE";
 329                 case SHT_NOBITS:        return "SHT_NOBITS";
 330                 case SHT_REL:           return "SHT_REL";
 331                 case SHT_SHLIB:         return "SHT_SHLIB";
 332                 case SHT_DYNSYM:        return "SHT_DYNSYM";
 333                 case SHT_INIT_ARRAY:    return "SHT_INIT_ARRAY";
 334                 case SHT_FINI_ARRAY:    return "SHT_FINI_ARRAY";
 335                 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
 336                 case SHT_GROUP:         return "SHT_GROUP";
 337                 case SHT_SYMTAB_SHNDX:  return "SHT_SYMTAB_SHNDX";
 338                 }
 339                 snprintf(unknown_buf, sizeof(unknown_buf),
 340                     "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
 341                 return (unknown_buf);
 342         } else if (sht < 0x70000000) {
 343                 /* 0x60000000-0x6fffffff operating system-specific semantics */
 344                 switch (sht) {
 345                 case 0x6ffffff0:        return "XXX:VERSYM";
 346                 case SHT_SUNW_dof:      return "SHT_SUNW_dof";
 347                 case SHT_GNU_HASH:      return "SHT_GNU_HASH";
 348                 case 0x6ffffff7:        return "SHT_GNU_LIBLIST";
 349                 case 0x6ffffffc:        return "XXX:VERDEF";
 350                 case SHT_SUNW_verdef:   return "SHT_SUNW(GNU)_verdef";
 351                 case SHT_SUNW_verneed:  return "SHT_SUNW(GNU)_verneed";
 352                 case SHT_SUNW_versym:   return "SHT_SUNW(GNU)_versym";
 353                 }
 354                 snprintf(unknown_buf, sizeof(unknown_buf),
 355                     "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
 356                      (uintmax_t)sht);
 357                 return (unknown_buf);
 358         } else if (sht < 0x80000000) {
 359                 /* 0x70000000-0x7fffffff processor-specific semantics */
 360                 switch (machine) {
 361                 case EM_ARM:
 362                         switch (sht) {
 363                         case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
 364                         case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
 365                         case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
 366                         case SHT_ARM_DEBUGOVERLAY:
 367                             return "SHT_ARM_DEBUGOVERLAY";
 368                         case SHT_ARM_OVERLAYSECTION:
 369                             return "SHT_ARM_OVERLAYSECTION";
 370                         }
 371                         break;
 372                 case EM_IA_64:
 373                         switch (sht) {
 374                         case 0x70000000: return "SHT_IA_64_EXT";
 375                         case 0x70000001: return "SHT_IA_64_UNWIND";
 376                         }
 377                         break;
 378                 case EM_MIPS:
 379                         switch (sht) {
 380                         case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
 381                         }
 382                         break;
 383                 }
 384                 switch (sht) {
 385                 case 0x7ffffffd: return "XXX:AUXILIARY";
 386                 case 0x7fffffff: return "XXX:FILTER";
 387                 }
 388                 snprintf(unknown_buf, sizeof(unknown_buf),
 389                     "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
 390                      (uintmax_t)sht);
 391                 return (unknown_buf);
 392         } else {
 393                 /* 0x80000000-0xffffffff application programs */
 394                 snprintf(unknown_buf, sizeof(unknown_buf),
 395                     "ERROR: SHT 0x%jx NOT DEFINED",
 396                      (uintmax_t)sht);
 397                 return (unknown_buf);
 398         }
 399 }
 400
 401 static const char *sh_flags[] = {
 402         "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
 403         "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
 404         "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
 405 };
 406
 407 static const char *st_types[] = {
 408         "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE"
 409 };
 410
 411 static const char *st_bindings[] = {
 412         "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
 413 };
 414
 415 static char *dynstr;
 416 static char *shstrtab;
 417 static char *strtab;
 418 static FILE *out;
 419
 420 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
 421 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
 422     elf_member_t member);
 423 #if 0
 424 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
 425 #endif
 426 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
 427 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
 428
 429 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
 430 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
 431 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
 432 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
 433 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
 434 static void elf_print_rel(Elf32_Ehdr *e, void *r);
 435 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
 436 static void elf_print_interp(Elf32_Ehdr *e, void *p);
 437 static void elf_print_got(Elf32_Ehdr *e, void *sh);
 438 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
 439 static void elf_print_note(Elf32_Ehdr *e, void *sh);
 440
 441 static void usage(void);
 442
 443 /*
 444  * Helpers for ELF files with shnum or shstrndx values that don't fit in the
 445  * ELF header.  If the values are too large then an escape value is used to
 446  * indicate that the actual value is found in one of section 0's fields.
 447  */
 448 static uint64_t
 449 elf_get_shnum(Elf32_Ehdr *e, void *sh)
 450 {
 451         uint64_t shnum;
 452
 453         shnum = elf_get_quarter(e, e, E_SHNUM);
 454         if (shnum == 0)
 455                 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
 456         return shnum;
 457 }
 458
 459 static uint64_t
 460 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
 461 {
 462         uint64_t shstrndx;
 463
 464         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 465         if (shstrndx == SHN_XINDEX)
 466                 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
 467         return shstrndx;
 468 }
 469
 470 int
 471 main(int ac, char **av)
 472 {
 473         cap_rights_t rights;
 474         u_int64_t phoff;
 475         u_int64_t shoff;
 476         u_int64_t phentsize;
 477         u_int64_t phnum;
 478         u_int64_t shentsize;
 479         u_int64_t shnum;
 480         u_int64_t shstrndx;
 481         u_int64_t offset;
 482         u_int64_t name;
 483         u_int64_t type;
 484         struct stat sb;
 485         u_int flags;
 486         Elf32_Ehdr *e;
 487         void *p;
 488         void *sh;
 489         void *v;
 490         int fd;
 491         int ch;
 492         int i;
 493
 494         out = stdout;
 495         flags = 0;
 496         while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
 497                 switch (ch) {
 498                 case 'a':
 499                         flags = ED_ALL;
 500                         break;
 501                 case 'c':
 502                         flags |= ED_SHDR;
 503                         break;
 504                 case 'd':
 505                         flags |= ED_DYN;
 506                         break;
 507                 case 'e':
 508                         flags |= ED_EHDR;
 509                         break;
 510                 case 'i':
 511                         flags |= ED_INTERP;
 512                         break;
 513                 case 'G':
 514                         flags |= ED_GOT;
 515                         break;
 516                 case 'h':
 517                         flags |= ED_HASH;
 518                         break;
 519                 case 'n':
 520                         flags |= ED_NOTE;
 521                         break;
 522                 case 'p':
 523                         flags |= ED_PHDR;
 524                         break;
 525                 case 'r':
 526                         flags |= ED_REL;
 527                         break;
 528                 case 's':
 529                         flags |= ED_SYMTAB;
 530                         break;
 531                 case 'w':
 532                         if ((out = fopen(optarg, "w")) == NULL)
 533                                 err(1, "%s", optarg);
 534                         cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
 535                         if (cap_rights_limit(fileno(out), &rights) < 0 && errno != ENOSYS)
 536                                 err(1, "unable to limit rights for %s", optarg);
 537                         break;
 538                 case '?':
 539                 default:
 540                         usage();
 541                 }
 542         ac -= optind;
 543         av += optind;
 544         if (ac == 0 || flags == 0)
 545                 usage();
 546         if ((fd = open(*av, O_RDONLY)) < 0 ||
 547             fstat(fd, &sb) < 0)
 548                 err(1, "%s", *av);
 549         cap_rights_init(&rights, CAP_MMAP_R);
 550         if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
 551                 err(1, "unable to limit rights for %s", *av);
 552         close(STDIN_FILENO);
 553         cap_rights_init(&rights, CAP_WRITE);
 554         if (cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS)
 555                 err(1, "unable to limit rights for stdout");
 556         if (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS)
 557                 err(1, "unable to limit rights for stderr");
 558         if (cap_enter() < 0 && errno != ENOSYS)
 559                 err(1, "unable to enter capability mode");
 560         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 561         if (e == MAP_FAILED)
 562                 err(1, NULL);
 563         if (!IS_ELF(*(Elf32_Ehdr *)e))
 564                 errx(1, "not an elf file");
 565         phoff = elf_get_off(e, e, E_PHOFF);
 566         shoff = elf_get_off(e, e, E_SHOFF);
 567         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 568         phnum = elf_get_quarter(e, e, E_PHNUM);
 569         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 570         p = (char *)e + phoff;
 571         if (shoff > 0) {
 572                 sh = (char *)e + shoff;
 573                 shnum = elf_get_shnum(e, sh);
 574                 shstrndx = elf_get_shstrndx(e, sh);
 575                 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
 576                     SH_OFFSET);
 577                 shstrtab = (char *)e + offset;
 578         } else {
 579                 sh = NULL;
 580                 shnum = 0;
 581                 shstrndx = 0;
 582                 shstrtab = NULL;
 583         }
 584         for (i = 0; (u_int64_t)i < shnum; i++) {
 585                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 586                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 587                 if (strcmp(shstrtab + name, ".strtab") == 0)
 588                         strtab = (char *)e + offset;
 589                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 590                         dynstr = (char *)e + offset;
 591         }
 592         if (flags & ED_EHDR)
 593                 elf_print_ehdr(e, sh);
 594         if (flags & ED_PHDR)
 595                 elf_print_phdr(e, p);
 596         if (flags & ED_SHDR)
 597                 elf_print_shdr(e, sh);
 598         for (i = 0; (u_int64_t)i < phnum; i++) {
 599                 v = (char *)p + i * phentsize;
 600                 type = elf_get_word(e, v, P_TYPE);
 601                 switch (type) {
 602                 case PT_INTERP:
 603                         if (flags & ED_INTERP)
 604                                 elf_print_interp(e, v);
 605                         break;
 606                 case PT_NULL:
 607                 case PT_LOAD:
 608                 case PT_DYNAMIC:
 609                 case PT_NOTE:
 610                 case PT_SHLIB:
 611                 case PT_PHDR:
 612                         break;
 613                 }
 614         }
 615         for (i = 0; (u_int64_t)i < shnum; i++) {
 616                 v = (char *)sh + i * shentsize;
 617                 type = elf_get_word(e, v, SH_TYPE);
 618                 switch (type) {
 619                 case SHT_SYMTAB:
 620                         if (flags & ED_SYMTAB)
 621                                 elf_print_symtab(e, v, strtab);
 622                         break;
 623                 case SHT_DYNAMIC:
 624                         if (flags & ED_DYN)
 625                                 elf_print_dynamic(e, v);
 626                         break;
 627                 case SHT_RELA:
 628                         if (flags & ED_REL)
 629                                 elf_print_rela(e, v);
 630                         break;
 631                 case SHT_REL:
 632                         if (flags & ED_REL)
 633                                 elf_print_rel(e, v);
 634                         break;
 635                 case SHT_NOTE:
 636                         name = elf_get_word(e, v, SH_NAME);
 637                         if (flags & ED_NOTE &&
 638                             strcmp(shstrtab + name, ".note.ABI-tag") == 0)
 639                                 elf_print_note(e, v);
 640                         break;
 641                 case SHT_DYNSYM:
 642                         if (flags & ED_SYMTAB)
 643                                 elf_print_symtab(e, v, dynstr);
 644                         break;
 645                 case SHT_PROGBITS:
 646                         name = elf_get_word(e, v, SH_NAME);
 647                         if (flags & ED_GOT &&
 648                             strcmp(shstrtab + name, ".got") == 0)
 649                                 elf_print_got(e, v);
 650                         break;
 651                 case SHT_HASH:
 652                         if (flags & ED_HASH)
 653                                 elf_print_hash(e, v);
 654                         break;
 655                 case SHT_NULL:
 656                 case SHT_STRTAB:
 657                 case SHT_NOBITS:
 658                 case SHT_SHLIB:
 659                         break;
 660                 }
 661         }
 662
 663         return 0;
 664 }
 665
 666 static void
 667 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
 668 {
 669         u_int64_t class;
 670         u_int64_t data;
 671         u_int64_t osabi;
 672         u_int64_t type;
 673         u_int64_t machine;
 674         u_int64_t version;
 675         u_int64_t entry;
 676         u_int64_t phoff;
 677         u_int64_t shoff;
 678         u_int64_t flags;
 679         u_int64_t ehsize;
 680         u_int64_t phentsize;
 681         u_int64_t phnum;
 682         u_int64_t shentsize;
 683         u_int64_t shnum;
 684         u_int64_t shstrndx;
 685
 686         class = elf_get_byte(e, e, E_CLASS);
 687         data = elf_get_byte(e, e, E_DATA);
 688         osabi = elf_get_byte(e, e, E_OSABI);
 689         type = elf_get_quarter(e, e, E_TYPE);
 690         machine = elf_get_quarter(e, e, E_MACHINE);
 691         version = elf_get_word(e, e, E_VERSION);
 692         entry = elf_get_addr(e, e, E_ENTRY);
 693         phoff = elf_get_off(e, e, E_PHOFF);
 694         shoff = elf_get_off(e, e, E_SHOFF);
 695         flags = elf_get_word(e, e, E_FLAGS);
 696         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 697         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 698         phnum = elf_get_quarter(e, e, E_PHNUM);
 699         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 700         fprintf(out, "\nelf header:\n");
 701         fprintf(out, "\n");
 702         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 703             ei_abis[osabi]);
 704         fprintf(out, "\te_type: %s\n", e_types[type]);
 705         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 706         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 707         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 708         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 709         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 710         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 711         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 712         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 713         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 714         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 715         if (sh != NULL) {
 716                 shnum = elf_get_shnum(e, sh);
 717                 shstrndx = elf_get_shstrndx(e, sh);
 718                 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 719                 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 720         }
 721 }
 722
 723 static void
 724 elf_print_phdr(Elf32_Ehdr *e, void *p)
 725 {
 726         u_int64_t phentsize;
 727         u_int64_t phnum;
 728         u_int64_t type;
 729         u_int64_t offset;
 730         u_int64_t vaddr;
 731         u_int64_t paddr;
 732         u_int64_t filesz;
 733         u_int64_t memsz;
 734         u_int64_t flags;
 735         u_int64_t align;
 736         void *v;
 737         int i;
 738
 739         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 740         phnum = elf_get_quarter(e, e, E_PHNUM);
 741         fprintf(out, "\nprogram header:\n");
 742         for (i = 0; (u_int64_t)i < phnum; i++) {
 743                 v = (char *)p + i * phentsize;
 744                 type = elf_get_word(e, v, P_TYPE);
 745                 offset = elf_get_off(e, v, P_OFFSET);
 746                 vaddr = elf_get_addr(e, v, P_VADDR);
 747                 paddr = elf_get_addr(e, v, P_PADDR);
 748                 filesz = elf_get_size(e, v, P_FILESZ);
 749                 memsz = elf_get_size(e, v, P_MEMSZ);
 750                 flags = elf_get_word(e, v, P_FLAGS);
 751                 align = elf_get_size(e, v, P_ALIGN);
 752                 fprintf(out, "\n");
 753                 fprintf(out, "entry: %d\n", i);
 754                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 755                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 756                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 757                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 758                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 759                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 760                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 761                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 762         }
 763 }
 764
 765 static void
 766 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 767 {
 768         u_int64_t shentsize;
 769         u_int64_t shnum;
 770         u_int64_t name;
 771         u_int64_t type;
 772         u_int64_t flags;
 773         u_int64_t addr;
 774         u_int64_t offset;
 775         u_int64_t size;
 776         u_int64_t shlink;
 777         u_int64_t info;
 778         u_int64_t addralign;
 779         u_int64_t entsize;
 780         u_int64_t machine;
 781         void *v;
 782         int i;
 783
 784         if (sh == NULL) {
 785                 fprintf(out, "\nNo section headers\n");
 786                 return;
 787         }
 788
 789         machine = elf_get_quarter(e, e, E_MACHINE);
 790         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 791         shnum = elf_get_shnum(e, sh);
 792         fprintf(out, "\nsection header:\n");
 793         for (i = 0; (u_int64_t)i < shnum; i++) {
 794                 v = (char *)sh + i * shentsize;
 795                 name = elf_get_word(e, v, SH_NAME);
 796                 type = elf_get_word(e, v, SH_TYPE);
 797                 flags = elf_get_word(e, v, SH_FLAGS);
 798                 addr = elf_get_addr(e, v, SH_ADDR);
 799                 offset = elf_get_off(e, v, SH_OFFSET);
 800                 size = elf_get_size(e, v, SH_SIZE);
 801                 shlink = elf_get_word(e, v, SH_LINK);
 802                 info = elf_get_word(e, v, SH_INFO);
 803                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 804                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 805                 fprintf(out, "\n");
 806                 fprintf(out, "entry: %d\n", i);
 807                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 808                 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
 809                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 810                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 811                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 812                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 813                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 814                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 815                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 816                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 817         }
 818 }
 819
 820 static void
 821 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 822 {
 823         u_int64_t offset;
 824         u_int64_t entsize;
 825         u_int64_t size;
 826         u_int64_t name;
 827         u_int64_t value;
 828         u_int64_t info;
 829         u_int64_t shndx;
 830         void *st;
 831         int len;
 832         int i;
 833
 834         offset = elf_get_off(e, sh, SH_OFFSET);
 835         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 836         size = elf_get_size(e, sh, SH_SIZE);
 837         name = elf_get_word(e, sh, SH_NAME);
 838         len = size / entsize;
 839         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 840         for (i = 0; i < len; i++) {
 841                 st = (char *)e + offset + i * entsize;
 842                 name = elf_get_word(e, st, ST_NAME);
 843                 value = elf_get_addr(e, st, ST_VALUE);
 844                 size = elf_get_size(e, st, ST_SIZE);
 845                 info = elf_get_byte(e, st, ST_INFO);
 846                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 847                 fprintf(out, "\n");
 848                 fprintf(out, "entry: %d\n", i);
 849                 fprintf(out, "\tst_name: %s\n", str + name);
 850                 fprintf(out, "\tst_value: %#jx\n", value);
 851                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 852                 fprintf(out, "\tst_info: %s %s\n",
 853                     st_types[ELF32_ST_TYPE(info)],
 854                     st_bindings[ELF32_ST_BIND(info)]);
 855                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 856         }
 857 }
 858
 859 static void
 860 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 861 {
 862         u_int64_t offset;
 863         u_int64_t entsize;
 864         u_int64_t size;
 865         int64_t tag;
 866         u_int64_t ptr;
 867         u_int64_t val;
 868         void *d;
 869         int i;
 870
 871         offset = elf_get_off(e, sh, SH_OFFSET);
 872         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 873         size = elf_get_size(e, sh, SH_SIZE);
 874         fprintf(out, "\ndynamic:\n");
 875         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 876                 d = (char *)e + offset + i * entsize;
 877                 tag = elf_get_size(e, d, D_TAG);
 878                 ptr = elf_get_size(e, d, D_PTR);
 879                 val = elf_get_addr(e, d, D_VAL);
 880                 fprintf(out, "\n");
 881                 fprintf(out, "entry: %d\n", i);
 882                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 883                 switch (tag) {
 884                 case DT_NEEDED:
 885                 case DT_SONAME:
 886                 case DT_RPATH:
 887                         fprintf(out, "\td_val: %s\n", dynstr + val);
 888                         break;
 889                 case DT_PLTRELSZ:
 890                 case DT_RELA:
 891                 case DT_RELASZ:
 892                 case DT_RELAENT:
 893                 case DT_STRSZ:
 894                 case DT_SYMENT:
 895                 case DT_RELSZ:
 896                 case DT_RELENT:
 897                 case DT_PLTREL:
 898                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 899                         break;
 900                 case DT_PLTGOT:
 901                 case DT_HASH:
 902                 case DT_STRTAB:
 903                 case DT_SYMTAB:
 904                 case DT_INIT:
 905                 case DT_FINI:
 906                 case DT_REL:
 907                 case DT_JMPREL:
 908                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 909                         break;
 910                 case DT_NULL:
 911                 case DT_SYMBOLIC:
 912                 case DT_DEBUG:
 913                 case DT_TEXTREL:
 914                         break;
 915                 }
 916         }
 917 }
 918
 919 static void
 920 elf_print_rela(Elf32_Ehdr *e, void *sh)
 921 {
 922         u_int64_t offset;
 923         u_int64_t entsize;
 924         u_int64_t size;
 925         u_int64_t name;
 926         u_int64_t info;
 927         int64_t addend;
 928         void *ra;
 929         void *v;
 930         int i;
 931
 932         offset = elf_get_off(e, sh, SH_OFFSET);
 933         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 934         size = elf_get_size(e, sh, SH_SIZE);
 935         name = elf_get_word(e, sh, SH_NAME);
 936         v = (char *)e + offset;
 937         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 938         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 939                 ra = (char *)v + i * entsize;
 940                 offset = elf_get_addr(e, ra, RA_OFFSET);
 941                 info = elf_get_word(e, ra, RA_INFO);
 942                 addend = elf_get_off(e, ra, RA_ADDEND);
 943                 fprintf(out, "\n");
 944                 fprintf(out, "entry: %d\n", i);
 945                 fprintf(out, "\tr_offset: %#jx\n", offset);
 946                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 947                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 948         }
 949 }
 950
 951 static void
 952 elf_print_rel(Elf32_Ehdr *e, void *sh)
 953 {
 954         u_int64_t offset;
 955         u_int64_t entsize;
 956         u_int64_t size;
 957         u_int64_t name;
 958         u_int64_t info;
 959         void *r;
 960         void *v;
 961         int i;
 962
 963         offset = elf_get_off(e, sh, SH_OFFSET);
 964         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 965         size = elf_get_size(e, sh, SH_SIZE);
 966         name = elf_get_word(e, sh, SH_NAME);
 967         v = (char *)e + offset;
 968         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
 969         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 970                 r = (char *)v + i * entsize;
 971                 offset = elf_get_addr(e, r, R_OFFSET);
 972                 info = elf_get_word(e, r, R_INFO);
 973                 fprintf(out, "\n");
 974                 fprintf(out, "entry: %d\n", i);
 975                 fprintf(out, "\tr_offset: %#jx\n", offset);
 976                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 977         }
 978 }
 979
 980 static void
 981 elf_print_interp(Elf32_Ehdr *e, void *p)
 982 {
 983         u_int64_t offset;
 984         char *s;
 985
 986         offset = elf_get_off(e, p, P_OFFSET);
 987         s = (char *)e + offset;
 988         fprintf(out, "\ninterp:\n");
 989         fprintf(out, "\t%s\n", s);
 990 }
 991
 992 static void
 993 elf_print_got(Elf32_Ehdr *e, void *sh)
 994 {
 995         u_int64_t offset;
 996         u_int64_t addralign;
 997         u_int64_t size;
 998         u_int64_t addr;
 999         void *v;
1000         int i;
1001
1002         offset = elf_get_off(e, sh, SH_OFFSET);
1003         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1004         size = elf_get_size(e, sh, SH_SIZE);
1005         v = (char *)e + offset;
1006         fprintf(out, "\nglobal offset table:\n");
1007         for (i = 0; (u_int64_t)i < size / addralign; i++) {
1008                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1009                 fprintf(out, "\n");
1010                 fprintf(out, "entry: %d\n", i);
1011                 fprintf(out, "\t%#jx\n", addr);
1012         }
1013 }
1014
1015 static void
1016 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1017 {
1018 }
1019
1020 static void
1021 elf_print_note(Elf32_Ehdr *e, void *sh)
1022 {
1023         u_int64_t offset;
1024         u_int64_t size;
1025         u_int64_t name;
1026         u_int32_t namesz;
1027         u_int32_t descsz;
1028         u_int32_t desc;
1029         char *n, *s;
1030
1031         offset = elf_get_off(e, sh, SH_OFFSET);
1032         size = elf_get_size(e, sh, SH_SIZE);
1033         name = elf_get_word(e, sh, SH_NAME);
1034         n = (char *)e + offset;
1035         fprintf(out, "\nnote (%s):\n", shstrtab + name);
1036         while (n < ((char *)e + offset + size)) {
1037                 namesz = elf_get_word(e, n, N_NAMESZ);
1038                 descsz = elf_get_word(e, n, N_DESCSZ);
1039                 s = n + sizeof(Elf_Note);
1040                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1041                 fprintf(out, "\t%s %d\n", s, desc);
1042                 n += sizeof(Elf_Note) + namesz + descsz;
1043         }
1044 }
1045
1046 static u_int64_t
1047 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1048 {
1049         u_int64_t val;
1050
1051         val = 0;
1052         switch (e->e_ident[EI_CLASS]) {
1053         case ELFCLASS32:
1054                 val = ((uint8_t *)base)[elf32_offsets[member]];
1055                 break;
1056         case ELFCLASS64:
1057                 val = ((uint8_t *)base)[elf64_offsets[member]];
1058                 break;
1059         case ELFCLASSNONE:
1060                 errx(1, "invalid class");
1061         }
1062
1063         return val;
1064 }
1065
1066 static u_int64_t
1067 elf_get_quarter(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 = be16dec(base);
1078                         break;
1079                 case ELFDATA2LSB:
1080                         val = le16dec(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 = be16dec(base);
1091                         break;
1092                 case ELFDATA2LSB:
1093                         val = le16dec(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 #if 0
1107 static u_int64_t
1108 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1109 {
1110         u_int64_t val;
1111
1112         val = 0;
1113         switch (e->e_ident[EI_CLASS]) {
1114         case ELFCLASS32:
1115                 base = (char *)base + elf32_offsets[member];
1116                 switch (e->e_ident[EI_DATA]) {
1117                 case ELFDATA2MSB:
1118                         val = be16dec(base);
1119                         break;
1120                 case ELFDATA2LSB:
1121                         val = le16dec(base);
1122                         break;
1123                 case ELFDATANONE:
1124                         errx(1, "invalid data format");
1125                 }
1126                 break;
1127         case ELFCLASS64:
1128                 base = (char *)base + elf64_offsets[member];
1129                 switch (e->e_ident[EI_DATA]) {
1130                 case ELFDATA2MSB:
1131                         val = be32dec(base);
1132                         break;
1133                 case ELFDATA2LSB:
1134                         val = le32dec(base);
1135                         break;
1136                 case ELFDATANONE:
1137                         errx(1, "invalid data format");
1138                 }
1139                 break;
1140         case ELFCLASSNONE:
1141                 errx(1, "invalid class");
1142         }
1143
1144         return val;
1145 }
1146 #endif
1147
1148 static u_int64_t
1149 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1150 {
1151         u_int64_t val;
1152
1153         val = 0;
1154         switch (e->e_ident[EI_CLASS]) {
1155         case ELFCLASS32:
1156                 base = (char *)base + elf32_offsets[member];
1157                 switch (e->e_ident[EI_DATA]) {
1158                 case ELFDATA2MSB:
1159                         val = be32dec(base);
1160                         break;
1161                 case ELFDATA2LSB:
1162                         val = le32dec(base);
1163                         break;
1164                 case ELFDATANONE:
1165                         errx(1, "invalid data format");
1166                 }
1167                 break;
1168         case ELFCLASS64:
1169                 base = (char *)base + elf64_offsets[member];
1170                 switch (e->e_ident[EI_DATA]) {
1171                 case ELFDATA2MSB:
1172                         val = be32dec(base);
1173                         break;
1174                 case ELFDATA2LSB:
1175                         val = le32dec(base);
1176                         break;
1177                 case ELFDATANONE:
1178                         errx(1, "invalid data format");
1179                 }
1180                 break;
1181         case ELFCLASSNONE:
1182                 errx(1, "invalid class");
1183         }
1184
1185         return val;
1186 }
1187
1188 static u_int64_t
1189 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1190 {
1191         u_int64_t val;
1192
1193         val = 0;
1194         switch (e->e_ident[EI_CLASS]) {
1195         case ELFCLASS32:
1196                 base = (char *)base + elf32_offsets[member];
1197                 switch (e->e_ident[EI_DATA]) {
1198                 case ELFDATA2MSB:
1199                         val = be32dec(base);
1200                         break;
1201                 case ELFDATA2LSB:
1202                         val = le32dec(base);
1203                         break;
1204                 case ELFDATANONE:
1205                         errx(1, "invalid data format");
1206                 }
1207                 break;
1208         case ELFCLASS64:
1209                 base = (char *)base + elf64_offsets[member];
1210                 switch (e->e_ident[EI_DATA]) {
1211                 case ELFDATA2MSB:
1212                         val = be64dec(base);
1213                         break;
1214                 case ELFDATA2LSB:
1215                         val = le64dec(base);
1216                         break;
1217                 case ELFDATANONE:
1218                         errx(1, "invalid data format");
1219                 }
1220                 break;
1221         case ELFCLASSNONE:
1222                 errx(1, "invalid class");
1223         }
1224
1225         return val;
1226 }
1227
1228 static void
1229 usage(void)
1230 {
1231         fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");
1232         exit(1);
1233 }