usr.bin/elfdump/elfdump.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2003 David O'Brien.  All rights reserved.
   5  * Copyright (c) 2001 Jake Burkholder
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/types.h>
  34
  35 #include <sys/capsicum.h>
  36 #include <sys/elf32.h>
  37 #include <sys/elf64.h>
  38 #include <sys/endian.h>
  39 #include <sys/mman.h>
  40 #include <sys/stat.h>
  41 #include <err.h>
  42 #include <errno.h>
  43 #include <fcntl.h>
  44 #include <inttypes.h>
  45 #include <stddef.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <termios.h>
  50 #include <unistd.h>
  51
  52 #define ED_DYN          (1<<0)
  53 #define ED_EHDR         (1<<1)
  54 #define ED_GOT          (1<<2)
  55 #define ED_HASH         (1<<3)
  56 #define ED_INTERP       (1<<4)
  57 #define ED_NOTE         (1<<5)
  58 #define ED_PHDR         (1<<6)
  59 #define ED_REL          (1<<7)
  60 #define ED_SHDR         (1<<8)
  61 #define ED_SYMTAB       (1<<9)
  62 #define ED_ALL          ((1<<10)-1)
  63
  64 #define elf_get_addr    elf_get_quad
  65 #define elf_get_off     elf_get_quad
  66 #define elf_get_size    elf_get_quad
  67
  68 enum elf_member {
  69         D_TAG = 1, D_PTR, D_VAL,
  70
  71         E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
  72         E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
  73         E_SHNUM, E_SHSTRNDX,
  74
  75         N_NAMESZ, N_DESCSZ, N_TYPE,
  76
  77         P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
  78         P_ALIGN,
  79
  80         SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
  81         SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
  82
  83         ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
  84
  85         R_OFFSET, R_INFO,
  86
  87         RA_OFFSET, RA_INFO, RA_ADDEND
  88 };
  89
  90 typedef enum elf_member elf_member_t;
  91
  92 static int elf32_offsets[] = {
  93         0,
  94
  95         offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
  96         offsetof(Elf32_Dyn, d_un.d_val),
  97
  98         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
  99         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
 100         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
 101         offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
 102         offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
 103         offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
 104         offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
 105         offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
 106         offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
 107         offsetof(Elf32_Ehdr, e_shstrndx),
 108
 109         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 110         offsetof(Elf_Note, n_type),
 111
 112         offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
 113         offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
 114         offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
 115         offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
 116
 117         offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
 118         offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
 119         offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
 120         offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
 121         offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
 122
 123         offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
 124         offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
 125         offsetof(Elf32_Sym, st_shndx),
 126
 127         offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
 128
 129         offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
 130         offsetof(Elf32_Rela, r_addend)
 131 };
 132
 133 static int elf64_offsets[] = {
 134         0,
 135
 136         offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
 137         offsetof(Elf64_Dyn, d_un.d_val),
 138
 139         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
 140         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
 141         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
 142         offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
 143         offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
 144         offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
 145         offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
 146         offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
 147         offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
 148         offsetof(Elf64_Ehdr, e_shstrndx),
 149
 150         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 151         offsetof(Elf_Note, n_type),
 152
 153         offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
 154         offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
 155         offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
 156         offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
 157
 158         offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
 159         offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
 160         offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
 161         offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
 162         offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
 163
 164         offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
 165         offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
 166         offsetof(Elf64_Sym, st_shndx),
 167
 168         offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
 169
 170         offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
 171         offsetof(Elf64_Rela, r_addend)
 172 };
 173
 174 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
 175 static const char *
 176 d_tags(u_int64_t tag)
 177 {
 178         static char unknown_tag[48];
 179
 180         switch (tag) {
 181         case DT_NULL:           return "DT_NULL";
 182         case DT_NEEDED:         return "DT_NEEDED";
 183         case DT_PLTRELSZ:       return "DT_PLTRELSZ";
 184         case DT_PLTGOT:         return "DT_PLTGOT";
 185         case DT_HASH:           return "DT_HASH";
 186         case DT_STRTAB:         return "DT_STRTAB";
 187         case DT_SYMTAB:         return "DT_SYMTAB";
 188         case DT_RELA:           return "DT_RELA";
 189         case DT_RELASZ:         return "DT_RELASZ";
 190         case DT_RELAENT:        return "DT_RELAENT";
 191         case DT_STRSZ:          return "DT_STRSZ";
 192         case DT_SYMENT:         return "DT_SYMENT";
 193         case DT_INIT:           return "DT_INIT";
 194         case DT_FINI:           return "DT_FINI";
 195         case DT_SONAME:         return "DT_SONAME";
 196         case DT_RPATH:          return "DT_RPATH";
 197         case DT_SYMBOLIC:       return "DT_SYMBOLIC";
 198         case DT_REL:            return "DT_REL";
 199         case DT_RELSZ:          return "DT_RELSZ";
 200         case DT_RELENT:         return "DT_RELENT";
 201         case DT_PLTREL:         return "DT_PLTREL";
 202         case DT_DEBUG:          return "DT_DEBUG";
 203         case DT_TEXTREL:        return "DT_TEXTREL";
 204         case DT_JMPREL:         return "DT_JMPREL";
 205         case DT_BIND_NOW:       return "DT_BIND_NOW";
 206         case DT_INIT_ARRAY:     return "DT_INIT_ARRAY";
 207         case DT_FINI_ARRAY:     return "DT_FINI_ARRAY";
 208         case DT_INIT_ARRAYSZ:   return "DT_INIT_ARRAYSZ";
 209         case DT_FINI_ARRAYSZ:   return "DT_FINI_ARRAYSZ";
 210         case DT_RUNPATH:        return "DT_RUNPATH";
 211         case DT_FLAGS:          return "DT_FLAGS";
 212         case DT_PREINIT_ARRAY:  return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */
 213         case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ";
 214         /* 0x6000000D - 0x6ffff000 operating system-specific semantics */
 215         case 0x6ffffdf5:        return "DT_GNU_PRELINKED";
 216         case 0x6ffffdf6:        return "DT_GNU_CONFLICTSZ";
 217         case 0x6ffffdf7:        return "DT_GNU_LIBLISTSZ";
 218         case 0x6ffffdf8:        return "DT_SUNW_CHECKSUM";
 219         case DT_PLTPADSZ:       return "DT_PLTPADSZ";
 220         case DT_MOVEENT:        return "DT_MOVEENT";
 221         case DT_MOVESZ:         return "DT_MOVESZ";
 222         case DT_FEATURE:        return "DT_FEATURE";
 223         case DT_POSFLAG_1:      return "DT_POSFLAG_1";
 224         case DT_SYMINSZ:        return "DT_SYMINSZ";
 225         case DT_SYMINENT :      return "DT_SYMINENT (DT_VALRNGHI)";
 226         case DT_ADDRRNGLO:      return "DT_ADDRRNGLO";
 227         case DT_GNU_HASH:       return "DT_GNU_HASH";
 228         case 0x6ffffef8:        return "DT_GNU_CONFLICT";
 229         case 0x6ffffef9:        return "DT_GNU_LIBLIST";
 230         case DT_CONFIG:         return "DT_CONFIG";
 231         case DT_DEPAUDIT:       return "DT_DEPAUDIT";
 232         case DT_AUDIT:          return "DT_AUDIT";
 233         case DT_PLTPAD:         return "DT_PLTPAD";
 234         case DT_MOVETAB:        return "DT_MOVETAB";
 235         case DT_SYMINFO :       return "DT_SYMINFO (DT_ADDRRNGHI)";
 236         case DT_RELACOUNT:      return "DT_RELACOUNT";
 237         case DT_RELCOUNT:       return "DT_RELCOUNT";
 238         case DT_FLAGS_1:        return "DT_FLAGS_1";
 239         case DT_VERDEF:         return "DT_VERDEF";
 240         case DT_VERDEFNUM:      return "DT_VERDEFNUM";
 241         case DT_VERNEED:        return "DT_VERNEED";
 242         case DT_VERNEEDNUM:     return "DT_VERNEEDNUM";
 243         case 0x6ffffff0:        return "DT_GNU_VERSYM";
 244         /* 0x70000000 - 0x7fffffff processor-specific semantics */
 245         case 0x70000000:        return "DT_IA_64_PLT_RESERVE";
 246         case DT_AUXILIARY:      return "DT_AUXILIARY";
 247         case DT_USED:           return "DT_USED";
 248         case DT_FILTER:         return "DT_FILTER";
 249         }
 250         snprintf(unknown_tag, sizeof(unknown_tag),
 251                 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag);
 252         return (unknown_tag);
 253 }
 254
 255 static const char *
 256 e_machines(u_int mach)
 257 {
 258         static char machdesc[64];
 259
 260         switch (mach) {
 261         case EM_NONE:   return "EM_NONE";
 262         case EM_M32:    return "EM_M32";
 263         case EM_SPARC:  return "EM_SPARC";
 264         case EM_386:    return "EM_386";
 265         case EM_68K:    return "EM_68K";
 266         case EM_88K:    return "EM_88K";
 267         case EM_IAMCU:  return "EM_IAMCU";
 268         case EM_860:    return "EM_860";
 269         case EM_MIPS:   return "EM_MIPS";
 270         case EM_PPC:    return "EM_PPC";
 271         case EM_PPC64:  return "EM_PPC64";
 272         case EM_ARM:    return "EM_ARM";
 273         case EM_ALPHA:  return "EM_ALPHA (legacy)";
 274         case EM_SPARCV9:return "EM_SPARCV9";
 275         case EM_IA_64:  return "EM_IA_64";
 276         case EM_X86_64: return "EM_X86_64";
 277         case EM_AARCH64:return "EM_AARCH64";
 278         case EM_RISCV:  return "EM_RISCV";
 279         }
 280         snprintf(machdesc, sizeof(machdesc),
 281             "(unknown machine) -- type 0x%x", mach);
 282         return (machdesc);
 283 }
 284
 285 static const char *e_types[] = {
 286         "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
 287 };
 288
 289 static const char *ei_versions[] = {
 290         "EV_NONE", "EV_CURRENT"
 291 };
 292
 293 static const char *ei_classes[] = {
 294         "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
 295 };
 296
 297 static const char *ei_data[] = {
 298         "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
 299 };
 300
 301 static const char *ei_abis[256] = {
 302         "ELFOSABI_NONE", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
 303         "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
 304         "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
 305         "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
 306         [255] = "ELFOSABI_STANDALONE"
 307 };
 308
 309 static const char *p_types[] = {
 310         "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
 311         "PT_SHLIB", "PT_PHDR", "PT_TLS"
 312 };
 313
 314 static const char *p_flags[] = {
 315         "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
 316         "PF_X|PF_W|PF_R"
 317 };
 318
 319 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
 320 static const char *
 321 sh_types(uint64_t machine, uint64_t sht) {
 322         static char unknown_buf[64];
 323
 324         if (sht < 0x60000000) {
 325                 switch (sht) {
 326                 case SHT_NULL:          return "SHT_NULL";
 327                 case SHT_PROGBITS:      return "SHT_PROGBITS";
 328                 case SHT_SYMTAB:        return "SHT_SYMTAB";
 329                 case SHT_STRTAB:        return "SHT_STRTAB";
 330                 case SHT_RELA:          return "SHT_RELA";
 331                 case SHT_HASH:          return "SHT_HASH";
 332                 case SHT_DYNAMIC:       return "SHT_DYNAMIC";
 333                 case SHT_NOTE:          return "SHT_NOTE";
 334                 case SHT_NOBITS:        return "SHT_NOBITS";
 335                 case SHT_REL:           return "SHT_REL";
 336                 case SHT_SHLIB:         return "SHT_SHLIB";
 337                 case SHT_DYNSYM:        return "SHT_DYNSYM";
 338                 case SHT_INIT_ARRAY:    return "SHT_INIT_ARRAY";
 339                 case SHT_FINI_ARRAY:    return "SHT_FINI_ARRAY";
 340                 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
 341                 case SHT_GROUP:         return "SHT_GROUP";
 342                 case SHT_SYMTAB_SHNDX:  return "SHT_SYMTAB_SHNDX";
 343                 }
 344                 snprintf(unknown_buf, sizeof(unknown_buf),
 345                     "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
 346                 return (unknown_buf);
 347         } else if (sht < 0x70000000) {
 348                 /* 0x60000000-0x6fffffff operating system-specific semantics */
 349                 switch (sht) {
 350                 case 0x6ffffff0:        return "XXX:VERSYM";
 351                 case SHT_SUNW_dof:      return "SHT_SUNW_dof";
 352                 case SHT_GNU_HASH:      return "SHT_GNU_HASH";
 353                 case 0x6ffffff7:        return "SHT_GNU_LIBLIST";
 354                 case 0x6ffffffc:        return "XXX:VERDEF";
 355                 case SHT_SUNW_verdef:   return "SHT_SUNW(GNU)_verdef";
 356                 case SHT_SUNW_verneed:  return "SHT_SUNW(GNU)_verneed";
 357                 case SHT_SUNW_versym:   return "SHT_SUNW(GNU)_versym";
 358                 }
 359                 snprintf(unknown_buf, sizeof(unknown_buf),
 360                     "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
 361                      (uintmax_t)sht);
 362                 return (unknown_buf);
 363         } else if (sht < 0x80000000) {
 364                 /* 0x70000000-0x7fffffff processor-specific semantics */
 365                 switch (machine) {
 366                 case EM_ARM:
 367                         switch (sht) {
 368                         case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
 369                         case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
 370                         case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
 371                         case SHT_ARM_DEBUGOVERLAY:
 372                             return "SHT_ARM_DEBUGOVERLAY";
 373                         case SHT_ARM_OVERLAYSECTION:
 374                             return "SHT_ARM_OVERLAYSECTION";
 375                         }
 376                         break;
 377                 case EM_IA_64:
 378                         switch (sht) {
 379                         case 0x70000000: return "SHT_IA_64_EXT";
 380                         case 0x70000001: return "SHT_IA_64_UNWIND";
 381                         }
 382                         break;
 383                 case EM_MIPS:
 384                         switch (sht) {
 385                         case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO";
 386                         case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
 387                         case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS";
 388                         }
 389                         break;
 390                 }
 391                 switch (sht) {
 392                 case 0x7ffffffd: return "XXX:AUXILIARY";
 393                 case 0x7fffffff: return "XXX:FILTER";
 394                 }
 395                 snprintf(unknown_buf, sizeof(unknown_buf),
 396                     "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
 397                      (uintmax_t)sht);
 398                 return (unknown_buf);
 399         } else {
 400                 /* 0x80000000-0xffffffff application programs */
 401                 snprintf(unknown_buf, sizeof(unknown_buf),
 402                     "ERROR: SHT 0x%jx NOT DEFINED",
 403                      (uintmax_t)sht);
 404                 return (unknown_buf);
 405         }
 406 }
 407
 408 static const char *sh_flags[] = {
 409         "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
 410         "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
 411         "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
 412 };
 413
 414 static const char *
 415 st_type(unsigned int mach, unsigned int type)
 416 {
 417         static char s_type[32];
 418
 419         switch (type) {
 420         case STT_NOTYPE: return "STT_NOTYPE";
 421         case STT_OBJECT: return "STT_OBJECT";
 422         case STT_FUNC: return "STT_FUNC";
 423         case STT_SECTION: return "STT_SECTION";
 424         case STT_FILE: return "STT_FILE";
 425         case STT_COMMON: return "STT_COMMON";
 426         case STT_TLS: return "STT_TLS";
 427         case 13:
 428                 if (mach == EM_SPARCV9)
 429                         return "STT_SPARC_REGISTER";
 430                 break;
 431         }
 432         snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type);
 433         return (s_type);
 434 }
 435
 436 static const char *st_bindings[] = {
 437         "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
 438 };
 439
 440 static char *dynstr;
 441 static char *shstrtab;
 442 static char *strtab;
 443 static FILE *out;
 444
 445 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
 446 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
 447     elf_member_t member);
 448 #if 0
 449 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
 450 #endif
 451 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
 452 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
 453
 454 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
 455 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
 456 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
 457 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
 458 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
 459 static void elf_print_rel(Elf32_Ehdr *e, void *r);
 460 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
 461 static void elf_print_interp(Elf32_Ehdr *e, void *p);
 462 static void elf_print_got(Elf32_Ehdr *e, void *sh);
 463 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
 464 static void elf_print_note(Elf32_Ehdr *e, void *sh);
 465
 466 static void usage(void);
 467
 468 /*
 469  * Helpers for ELF files with shnum or shstrndx values that don't fit in the
 470  * ELF header.  If the values are too large then an escape value is used to
 471  * indicate that the actual value is found in one of section 0's fields.
 472  */
 473 static uint64_t
 474 elf_get_shnum(Elf32_Ehdr *e, void *sh)
 475 {
 476         uint64_t shnum;
 477
 478         shnum = elf_get_quarter(e, e, E_SHNUM);
 479         if (shnum == 0)
 480                 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
 481         return shnum;
 482 }
 483
 484 static uint64_t
 485 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
 486 {
 487         uint64_t shstrndx;
 488
 489         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 490         if (shstrndx == SHN_XINDEX)
 491                 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
 492         return shstrndx;
 493 }
 494
 495 int
 496 main(int ac, char **av)
 497 {
 498         cap_rights_t rights;
 499         u_int64_t phoff;
 500         u_int64_t shoff;
 501         u_int64_t phentsize;
 502         u_int64_t phnum;
 503         u_int64_t shentsize;
 504         u_int64_t shnum;
 505         u_int64_t shstrndx;
 506         u_int64_t offset;
 507         u_int64_t name;
 508         u_int64_t type;
 509         struct stat sb;
 510         unsigned long cmd;
 511         u_int flags;
 512         Elf32_Ehdr *e;
 513         void *p;
 514         void *sh;
 515         void *v;
 516         int fd;
 517         int ch;
 518         int i;
 519
 520         out = stdout;
 521         flags = 0;
 522         while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
 523                 switch (ch) {
 524                 case 'a':
 525                         flags = ED_ALL;
 526                         break;
 527                 case 'c':
 528                         flags |= ED_SHDR;
 529                         break;
 530                 case 'd':
 531                         flags |= ED_DYN;
 532                         break;
 533                 case 'e':
 534                         flags |= ED_EHDR;
 535                         break;
 536                 case 'i':
 537                         flags |= ED_INTERP;
 538                         break;
 539                 case 'G':
 540                         flags |= ED_GOT;
 541                         break;
 542                 case 'h':
 543                         flags |= ED_HASH;
 544                         break;
 545                 case 'n':
 546                         flags |= ED_NOTE;
 547                         break;
 548                 case 'p':
 549                         flags |= ED_PHDR;
 550                         break;
 551                 case 'r':
 552                         flags |= ED_REL;
 553                         break;
 554                 case 's':
 555                         flags |= ED_SYMTAB;
 556                         break;
 557                 case 'w':
 558                         if ((out = fopen(optarg, "w")) == NULL)
 559                                 err(1, "%s", optarg);
 560                         cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
 561                         if (cap_rights_limit(fileno(out), &rights) < 0 && errno != ENOSYS)
 562                                 err(1, "unable to limit rights for %s", optarg);
 563                         break;
 564                 case '?':
 565                 default:
 566                         usage();
 567                 }
 568         ac -= optind;
 569         av += optind;
 570         if (ac == 0 || flags == 0)
 571                 usage();
 572         if ((fd = open(*av, O_RDONLY)) < 0 ||
 573             fstat(fd, &sb) < 0)
 574                 err(1, "%s", *av);
 575         cap_rights_init(&rights, CAP_MMAP_R);
 576         if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
 577                 err(1, "unable to limit rights for %s", *av);
 578         close(STDIN_FILENO);
 579         cap_rights_init(&rights, CAP_FSTAT, CAP_IOCTL, CAP_WRITE);
 580         cmd = TIOCGETA; /* required by isatty(3) in printf(3) */
 581         if ((cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS) ||
 582             (cap_ioctls_limit(STDOUT_FILENO, &cmd, 1) < 0 && errno != ENOSYS) ||
 583             (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS) ||
 584             (cap_ioctls_limit(STDERR_FILENO, &cmd, 1) < 0 && errno != ENOSYS))
 585                 err(1, "unable to limit rights for stdout/stderr");
 586         if (cap_enter() < 0 && errno != ENOSYS)
 587                 err(1, "unable to enter capability mode");
 588         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 589         if (e == MAP_FAILED)
 590                 err(1, NULL);
 591         if (!IS_ELF(*(Elf32_Ehdr *)e))
 592                 errx(1, "not an elf file");
 593         phoff = elf_get_off(e, e, E_PHOFF);
 594         shoff = elf_get_off(e, e, E_SHOFF);
 595         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 596         phnum = elf_get_quarter(e, e, E_PHNUM);
 597         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 598         p = (char *)e + phoff;
 599         if (shoff > 0) {
 600                 sh = (char *)e + shoff;
 601                 shnum = elf_get_shnum(e, sh);
 602                 shstrndx = elf_get_shstrndx(e, sh);
 603                 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
 604                     SH_OFFSET);
 605                 shstrtab = (char *)e + offset;
 606         } else {
 607                 sh = NULL;
 608                 shnum = 0;
 609                 shstrndx = 0;
 610                 shstrtab = NULL;
 611         }
 612         for (i = 0; (u_int64_t)i < shnum; i++) {
 613                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 614                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 615                 if (strcmp(shstrtab + name, ".strtab") == 0)
 616                         strtab = (char *)e + offset;
 617                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 618                         dynstr = (char *)e + offset;
 619         }
 620         if (flags & ED_EHDR)
 621                 elf_print_ehdr(e, sh);
 622         if (flags & ED_PHDR)
 623                 elf_print_phdr(e, p);
 624         if (flags & ED_SHDR)
 625                 elf_print_shdr(e, sh);
 626         for (i = 0; (u_int64_t)i < phnum; i++) {
 627                 v = (char *)p + i * phentsize;
 628                 type = elf_get_word(e, v, P_TYPE);
 629                 switch (type) {
 630                 case PT_INTERP:
 631                         if (flags & ED_INTERP)
 632                                 elf_print_interp(e, v);
 633                         break;
 634                 case PT_NULL:
 635                 case PT_LOAD:
 636                 case PT_DYNAMIC:
 637                 case PT_NOTE:
 638                 case PT_SHLIB:
 639                 case PT_PHDR:
 640                         break;
 641                 }
 642         }
 643         for (i = 0; (u_int64_t)i < shnum; i++) {
 644                 v = (char *)sh + i * shentsize;
 645                 type = elf_get_word(e, v, SH_TYPE);
 646                 switch (type) {
 647                 case SHT_SYMTAB:
 648                         if (flags & ED_SYMTAB)
 649                                 elf_print_symtab(e, v, strtab);
 650                         break;
 651                 case SHT_DYNAMIC:
 652                         if (flags & ED_DYN)
 653                                 elf_print_dynamic(e, v);
 654                         break;
 655                 case SHT_RELA:
 656                         if (flags & ED_REL)
 657                                 elf_print_rela(e, v);
 658                         break;
 659                 case SHT_REL:
 660                         if (flags & ED_REL)
 661                                 elf_print_rel(e, v);
 662                         break;
 663                 case SHT_NOTE:
 664                         name = elf_get_word(e, v, SH_NAME);
 665                         if (flags & ED_NOTE &&
 666                             strcmp(shstrtab + name, ".note.ABI-tag") == 0)
 667                                 elf_print_note(e, v);
 668                         break;
 669                 case SHT_DYNSYM:
 670                         if (flags & ED_SYMTAB)
 671                                 elf_print_symtab(e, v, dynstr);
 672                         break;
 673                 case SHT_PROGBITS:
 674                         name = elf_get_word(e, v, SH_NAME);
 675                         if (flags & ED_GOT &&
 676                             strcmp(shstrtab + name, ".got") == 0)
 677                                 elf_print_got(e, v);
 678                         break;
 679                 case SHT_HASH:
 680                         if (flags & ED_HASH)
 681                                 elf_print_hash(e, v);
 682                         break;
 683                 case SHT_NULL:
 684                 case SHT_STRTAB:
 685                 case SHT_NOBITS:
 686                 case SHT_SHLIB:
 687                         break;
 688                 }
 689         }
 690
 691         return 0;
 692 }
 693
 694 static void
 695 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
 696 {
 697         u_int64_t class;
 698         u_int64_t data;
 699         u_int64_t osabi;
 700         u_int64_t type;
 701         u_int64_t machine;
 702         u_int64_t version;
 703         u_int64_t entry;
 704         u_int64_t phoff;
 705         u_int64_t shoff;
 706         u_int64_t flags;
 707         u_int64_t ehsize;
 708         u_int64_t phentsize;
 709         u_int64_t phnum;
 710         u_int64_t shentsize;
 711         u_int64_t shnum;
 712         u_int64_t shstrndx;
 713
 714         class = elf_get_byte(e, e, E_CLASS);
 715         data = elf_get_byte(e, e, E_DATA);
 716         osabi = elf_get_byte(e, e, E_OSABI);
 717         type = elf_get_quarter(e, e, E_TYPE);
 718         machine = elf_get_quarter(e, e, E_MACHINE);
 719         version = elf_get_word(e, e, E_VERSION);
 720         entry = elf_get_addr(e, e, E_ENTRY);
 721         phoff = elf_get_off(e, e, E_PHOFF);
 722         shoff = elf_get_off(e, e, E_SHOFF);
 723         flags = elf_get_word(e, e, E_FLAGS);
 724         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 725         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 726         phnum = elf_get_quarter(e, e, E_PHNUM);
 727         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 728         fprintf(out, "\nelf header:\n");
 729         fprintf(out, "\n");
 730         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 731             ei_abis[osabi]);
 732         fprintf(out, "\te_type: %s\n", e_types[type]);
 733         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 734         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 735         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 736         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 737         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 738         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 739         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 740         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 741         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 742         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 743         if (sh != NULL) {
 744                 shnum = elf_get_shnum(e, sh);
 745                 shstrndx = elf_get_shstrndx(e, sh);
 746                 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 747                 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 748         }
 749 }
 750
 751 static void
 752 elf_print_phdr(Elf32_Ehdr *e, void *p)
 753 {
 754         u_int64_t phentsize;
 755         u_int64_t phnum;
 756         u_int64_t type;
 757         u_int64_t offset;
 758         u_int64_t vaddr;
 759         u_int64_t paddr;
 760         u_int64_t filesz;
 761         u_int64_t memsz;
 762         u_int64_t flags;
 763         u_int64_t align;
 764         void *v;
 765         int i;
 766
 767         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 768         phnum = elf_get_quarter(e, e, E_PHNUM);
 769         fprintf(out, "\nprogram header:\n");
 770         for (i = 0; (u_int64_t)i < phnum; i++) {
 771                 v = (char *)p + i * phentsize;
 772                 type = elf_get_word(e, v, P_TYPE);
 773                 offset = elf_get_off(e, v, P_OFFSET);
 774                 vaddr = elf_get_addr(e, v, P_VADDR);
 775                 paddr = elf_get_addr(e, v, P_PADDR);
 776                 filesz = elf_get_size(e, v, P_FILESZ);
 777                 memsz = elf_get_size(e, v, P_MEMSZ);
 778                 flags = elf_get_word(e, v, P_FLAGS);
 779                 align = elf_get_size(e, v, P_ALIGN);
 780                 fprintf(out, "\n");
 781                 fprintf(out, "entry: %d\n", i);
 782                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 783                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 784                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 785                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 786                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 787                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 788                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 789                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 790         }
 791 }
 792
 793 static void
 794 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 795 {
 796         u_int64_t shentsize;
 797         u_int64_t shnum;
 798         u_int64_t name;
 799         u_int64_t type;
 800         u_int64_t flags;
 801         u_int64_t addr;
 802         u_int64_t offset;
 803         u_int64_t size;
 804         u_int64_t shlink;
 805         u_int64_t info;
 806         u_int64_t addralign;
 807         u_int64_t entsize;
 808         u_int64_t machine;
 809         void *v;
 810         int i;
 811
 812         if (sh == NULL) {
 813                 fprintf(out, "\nNo section headers\n");
 814                 return;
 815         }
 816
 817         machine = elf_get_quarter(e, e, E_MACHINE);
 818         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 819         shnum = elf_get_shnum(e, sh);
 820         fprintf(out, "\nsection header:\n");
 821         for (i = 0; (u_int64_t)i < shnum; i++) {
 822                 v = (char *)sh + i * shentsize;
 823                 name = elf_get_word(e, v, SH_NAME);
 824                 type = elf_get_word(e, v, SH_TYPE);
 825                 flags = elf_get_word(e, v, SH_FLAGS);
 826                 addr = elf_get_addr(e, v, SH_ADDR);
 827                 offset = elf_get_off(e, v, SH_OFFSET);
 828                 size = elf_get_size(e, v, SH_SIZE);
 829                 shlink = elf_get_word(e, v, SH_LINK);
 830                 info = elf_get_word(e, v, SH_INFO);
 831                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 832                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 833                 fprintf(out, "\n");
 834                 fprintf(out, "entry: %d\n", i);
 835                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 836                 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
 837                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 838                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 839                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 840                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 841                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 842                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 843                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 844                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 845         }
 846 }
 847
 848 static void
 849 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 850 {
 851         u_int64_t machine;
 852         u_int64_t offset;
 853         u_int64_t entsize;
 854         u_int64_t size;
 855         u_int64_t name;
 856         u_int64_t value;
 857         u_int64_t info;
 858         u_int64_t shndx;
 859         void *st;
 860         int len;
 861         int i;
 862
 863         machine = elf_get_quarter(e, e, E_MACHINE);
 864         offset = elf_get_off(e, sh, SH_OFFSET);
 865         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 866         size = elf_get_size(e, sh, SH_SIZE);
 867         name = elf_get_word(e, sh, SH_NAME);
 868         len = size / entsize;
 869         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 870         for (i = 0; i < len; i++) {
 871                 st = (char *)e + offset + i * entsize;
 872                 name = elf_get_word(e, st, ST_NAME);
 873                 value = elf_get_addr(e, st, ST_VALUE);
 874                 size = elf_get_size(e, st, ST_SIZE);
 875                 info = elf_get_byte(e, st, ST_INFO);
 876                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 877                 fprintf(out, "\n");
 878                 fprintf(out, "entry: %d\n", i);
 879                 fprintf(out, "\tst_name: %s\n", str + name);
 880                 fprintf(out, "\tst_value: %#jx\n", value);
 881                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 882                 fprintf(out, "\tst_info: %s %s\n",
 883                     st_type(machine, ELF32_ST_TYPE(info)),
 884                     st_bindings[ELF32_ST_BIND(info)]);
 885                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 886         }
 887 }
 888
 889 static void
 890 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 891 {
 892         u_int64_t offset;
 893         u_int64_t entsize;
 894         u_int64_t size;
 895         int64_t tag;
 896         u_int64_t ptr;
 897         u_int64_t val;
 898         void *d;
 899         int i;
 900
 901         offset = elf_get_off(e, sh, SH_OFFSET);
 902         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 903         size = elf_get_size(e, sh, SH_SIZE);
 904         fprintf(out, "\ndynamic:\n");
 905         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 906                 d = (char *)e + offset + i * entsize;
 907                 tag = elf_get_size(e, d, D_TAG);
 908                 ptr = elf_get_size(e, d, D_PTR);
 909                 val = elf_get_addr(e, d, D_VAL);
 910                 fprintf(out, "\n");
 911                 fprintf(out, "entry: %d\n", i);
 912                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 913                 switch (tag) {
 914                 case DT_NEEDED:
 915                 case DT_SONAME:
 916                 case DT_RPATH:
 917                         fprintf(out, "\td_val: %s\n", dynstr + val);
 918                         break;
 919                 case DT_PLTRELSZ:
 920                 case DT_RELA:
 921                 case DT_RELASZ:
 922                 case DT_RELAENT:
 923                 case DT_STRSZ:
 924                 case DT_SYMENT:
 925                 case DT_RELSZ:
 926                 case DT_RELENT:
 927                 case DT_PLTREL:
 928                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 929                         break;
 930                 case DT_PLTGOT:
 931                 case DT_HASH:
 932                 case DT_STRTAB:
 933                 case DT_SYMTAB:
 934                 case DT_INIT:
 935                 case DT_FINI:
 936                 case DT_REL:
 937                 case DT_JMPREL:
 938                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 939                         break;
 940                 case DT_NULL:
 941                 case DT_SYMBOLIC:
 942                 case DT_DEBUG:
 943                 case DT_TEXTREL:
 944                         break;
 945                 }
 946         }
 947 }
 948
 949 static void
 950 elf_print_rela(Elf32_Ehdr *e, void *sh)
 951 {
 952         u_int64_t offset;
 953         u_int64_t entsize;
 954         u_int64_t size;
 955         u_int64_t name;
 956         u_int64_t info;
 957         int64_t addend;
 958         void *ra;
 959         void *v;
 960         int i;
 961
 962         offset = elf_get_off(e, sh, SH_OFFSET);
 963         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 964         size = elf_get_size(e, sh, SH_SIZE);
 965         name = elf_get_word(e, sh, SH_NAME);
 966         v = (char *)e + offset;
 967         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 968         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 969                 ra = (char *)v + i * entsize;
 970                 offset = elf_get_addr(e, ra, RA_OFFSET);
 971                 info = elf_get_word(e, ra, RA_INFO);
 972                 addend = elf_get_off(e, ra, RA_ADDEND);
 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                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 978         }
 979 }
 980
 981 static void
 982 elf_print_rel(Elf32_Ehdr *e, void *sh)
 983 {
 984         u_int64_t offset;
 985         u_int64_t entsize;
 986         u_int64_t size;
 987         u_int64_t name;
 988         u_int64_t info;
 989         void *r;
 990         void *v;
 991         int i;
 992
 993         offset = elf_get_off(e, sh, SH_OFFSET);
 994         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 995         size = elf_get_size(e, sh, SH_SIZE);
 996         name = elf_get_word(e, sh, SH_NAME);
 997         v = (char *)e + offset;
 998         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
 999         for (i = 0; (u_int64_t)i < size / entsize; i++) {
1000                 r = (char *)v + i * entsize;
1001                 offset = elf_get_addr(e, r, R_OFFSET);
1002                 info = elf_get_word(e, r, R_INFO);
1003                 fprintf(out, "\n");
1004                 fprintf(out, "entry: %d\n", i);
1005                 fprintf(out, "\tr_offset: %#jx\n", offset);
1006                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
1007         }
1008 }
1009
1010 static void
1011 elf_print_interp(Elf32_Ehdr *e, void *p)
1012 {
1013         u_int64_t offset;
1014         char *s;
1015
1016         offset = elf_get_off(e, p, P_OFFSET);
1017         s = (char *)e + offset;
1018         fprintf(out, "\ninterp:\n");
1019         fprintf(out, "\t%s\n", s);
1020 }
1021
1022 static void
1023 elf_print_got(Elf32_Ehdr *e, void *sh)
1024 {
1025         u_int64_t offset;
1026         u_int64_t addralign;
1027         u_int64_t size;
1028         u_int64_t addr;
1029         void *v;
1030         int i;
1031
1032         offset = elf_get_off(e, sh, SH_OFFSET);
1033         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1034         size = elf_get_size(e, sh, SH_SIZE);
1035         v = (char *)e + offset;
1036         fprintf(out, "\nglobal offset table:\n");
1037         for (i = 0; (u_int64_t)i < size / addralign; i++) {
1038                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1039                 fprintf(out, "\n");
1040                 fprintf(out, "entry: %d\n", i);
1041                 fprintf(out, "\t%#jx\n", addr);
1042         }
1043 }
1044
1045 static void
1046 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1047 {
1048 }
1049
1050 static void
1051 elf_print_note(Elf32_Ehdr *e, void *sh)
1052 {
1053         u_int64_t offset;
1054         u_int64_t size;
1055         u_int64_t name;
1056         u_int32_t namesz;
1057         u_int32_t descsz;
1058         u_int32_t desc;
1059         char *n, *s;
1060
1061         offset = elf_get_off(e, sh, SH_OFFSET);
1062         size = elf_get_size(e, sh, SH_SIZE);
1063         name = elf_get_word(e, sh, SH_NAME);
1064         n = (char *)e + offset;
1065         fprintf(out, "\nnote (%s):\n", shstrtab + name);
1066         while (n < ((char *)e + offset + size)) {
1067                 namesz = elf_get_word(e, n, N_NAMESZ);
1068                 descsz = elf_get_word(e, n, N_DESCSZ);
1069                 s = n + sizeof(Elf_Note);
1070                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1071                 fprintf(out, "\t%s %d\n", s, desc);
1072                 n += sizeof(Elf_Note) + namesz + descsz;
1073         }
1074 }
1075
1076 static u_int64_t
1077 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1078 {
1079         u_int64_t val;
1080
1081         val = 0;
1082         switch (e->e_ident[EI_CLASS]) {
1083         case ELFCLASS32:
1084                 val = ((uint8_t *)base)[elf32_offsets[member]];
1085                 break;
1086         case ELFCLASS64:
1087                 val = ((uint8_t *)base)[elf64_offsets[member]];
1088                 break;
1089         case ELFCLASSNONE:
1090                 errx(1, "invalid class");
1091         }
1092
1093         return val;
1094 }
1095
1096 static u_int64_t
1097 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1098 {
1099         u_int64_t val;
1100
1101         val = 0;
1102         switch (e->e_ident[EI_CLASS]) {
1103         case ELFCLASS32:
1104                 base = (char *)base + elf32_offsets[member];
1105                 switch (e->e_ident[EI_DATA]) {
1106                 case ELFDATA2MSB:
1107                         val = be16dec(base);
1108                         break;
1109                 case ELFDATA2LSB:
1110                         val = le16dec(base);
1111                         break;
1112                 case ELFDATANONE:
1113                         errx(1, "invalid data format");
1114                 }
1115                 break;
1116         case ELFCLASS64:
1117                 base = (char *)base + elf64_offsets[member];
1118                 switch (e->e_ident[EI_DATA]) {
1119                 case ELFDATA2MSB:
1120                         val = be16dec(base);
1121                         break;
1122                 case ELFDATA2LSB:
1123                         val = le16dec(base);
1124                         break;
1125                 case ELFDATANONE:
1126                         errx(1, "invalid data format");
1127                 }
1128                 break;
1129         case ELFCLASSNONE:
1130                 errx(1, "invalid class");
1131         }
1132
1133         return val;
1134 }
1135
1136 #if 0
1137 static u_int64_t
1138 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1139 {
1140         u_int64_t val;
1141
1142         val = 0;
1143         switch (e->e_ident[EI_CLASS]) {
1144         case ELFCLASS32:
1145                 base = (char *)base + elf32_offsets[member];
1146                 switch (e->e_ident[EI_DATA]) {
1147                 case ELFDATA2MSB:
1148                         val = be16dec(base);
1149                         break;
1150                 case ELFDATA2LSB:
1151                         val = le16dec(base);
1152                         break;
1153                 case ELFDATANONE:
1154                         errx(1, "invalid data format");
1155                 }
1156                 break;
1157         case ELFCLASS64:
1158                 base = (char *)base + elf64_offsets[member];
1159                 switch (e->e_ident[EI_DATA]) {
1160                 case ELFDATA2MSB:
1161                         val = be32dec(base);
1162                         break;
1163                 case ELFDATA2LSB:
1164                         val = le32dec(base);
1165                         break;
1166                 case ELFDATANONE:
1167                         errx(1, "invalid data format");
1168                 }
1169                 break;
1170         case ELFCLASSNONE:
1171                 errx(1, "invalid class");
1172         }
1173
1174         return val;
1175 }
1176 #endif
1177
1178 static u_int64_t
1179 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1180 {
1181         u_int64_t val;
1182
1183         val = 0;
1184         switch (e->e_ident[EI_CLASS]) {
1185         case ELFCLASS32:
1186                 base = (char *)base + elf32_offsets[member];
1187                 switch (e->e_ident[EI_DATA]) {
1188                 case ELFDATA2MSB:
1189                         val = be32dec(base);
1190                         break;
1191                 case ELFDATA2LSB:
1192                         val = le32dec(base);
1193                         break;
1194                 case ELFDATANONE:
1195                         errx(1, "invalid data format");
1196                 }
1197                 break;
1198         case ELFCLASS64:
1199                 base = (char *)base + elf64_offsets[member];
1200                 switch (e->e_ident[EI_DATA]) {
1201                 case ELFDATA2MSB:
1202                         val = be32dec(base);
1203                         break;
1204                 case ELFDATA2LSB:
1205                         val = le32dec(base);
1206                         break;
1207                 case ELFDATANONE:
1208                         errx(1, "invalid data format");
1209                 }
1210                 break;
1211         case ELFCLASSNONE:
1212                 errx(1, "invalid class");
1213         }
1214
1215         return val;
1216 }
1217
1218 static u_int64_t
1219 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1220 {
1221         u_int64_t val;
1222
1223         val = 0;
1224         switch (e->e_ident[EI_CLASS]) {
1225         case ELFCLASS32:
1226                 base = (char *)base + elf32_offsets[member];
1227                 switch (e->e_ident[EI_DATA]) {
1228                 case ELFDATA2MSB:
1229                         val = be32dec(base);
1230                         break;
1231                 case ELFDATA2LSB:
1232                         val = le32dec(base);
1233                         break;
1234                 case ELFDATANONE:
1235                         errx(1, "invalid data format");
1236                 }
1237                 break;
1238         case ELFCLASS64:
1239                 base = (char *)base + elf64_offsets[member];
1240                 switch (e->e_ident[EI_DATA]) {
1241                 case ELFDATA2MSB:
1242                         val = be64dec(base);
1243                         break;
1244                 case ELFDATA2LSB:
1245                         val = le64dec(base);
1246                         break;
1247                 case ELFDATANONE:
1248                         errx(1, "invalid data format");
1249                 }
1250                 break;
1251         case ELFCLASSNONE:
1252                 errx(1, "invalid class");
1253         }
1254
1255         return val;
1256 }
1257
1258 static void
1259 usage(void)
1260 {
1261         fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");
1262         exit(1);
1263 }