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/capsicum.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_IAMCU:  return "EM_IAMCU";
 265         case EM_860:    return "EM_860";
 266         case EM_MIPS:   return "EM_MIPS";
 267         case EM_PPC:    return "EM_PPC";
 268         case EM_PPC64:  return "EM_PPC64";
 269         case EM_ARM:    return "EM_ARM";
 270         case EM_ALPHA:  return "EM_ALPHA (legacy)";
 271         case EM_SPARCV9:return "EM_SPARCV9";
 272         case EM_IA_64:  return "EM_IA_64";
 273         case EM_X86_64: return "EM_X86_64";
 274         case EM_AARCH64:return "EM_AARCH64";
 275         case EM_RISCV:  return "EM_RISCV";
 276         }
 277         snprintf(machdesc, sizeof(machdesc),
 278             "(unknown machine) -- type 0x%x", mach);
 279         return (machdesc);
 280 }
 281
 282 static const char *e_types[] = {
 283         "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
 284 };
 285
 286 static const char *ei_versions[] = {
 287         "EV_NONE", "EV_CURRENT"
 288 };
 289
 290 static const char *ei_classes[] = {
 291         "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
 292 };
 293
 294 static const char *ei_data[] = {
 295         "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
 296 };
 297
 298 static const char *ei_abis[256] = {
 299         "ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
 300         "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
 301         "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
 302         "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
 303         [255] = "ELFOSABI_STANDALONE"
 304 };
 305
 306 static const char *p_types[] = {
 307         "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
 308         "PT_SHLIB", "PT_PHDR", "PT_TLS"
 309 };
 310
 311 static const char *p_flags[] = {
 312         "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
 313         "PF_X|PF_W|PF_R"
 314 };
 315
 316 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
 317 static const char *
 318 sh_types(uint64_t machine, uint64_t sht) {
 319         static char unknown_buf[64];
 320
 321         if (sht < 0x60000000) {
 322                 switch (sht) {
 323                 case SHT_NULL:          return "SHT_NULL";
 324                 case SHT_PROGBITS:      return "SHT_PROGBITS";
 325                 case SHT_SYMTAB:        return "SHT_SYMTAB";
 326                 case SHT_STRTAB:        return "SHT_STRTAB";
 327                 case SHT_RELA:          return "SHT_RELA";
 328                 case SHT_HASH:          return "SHT_HASH";
 329                 case SHT_DYNAMIC:       return "SHT_DYNAMIC";
 330                 case SHT_NOTE:          return "SHT_NOTE";
 331                 case SHT_NOBITS:        return "SHT_NOBITS";
 332                 case SHT_REL:           return "SHT_REL";
 333                 case SHT_SHLIB:         return "SHT_SHLIB";
 334                 case SHT_DYNSYM:        return "SHT_DYNSYM";
 335                 case SHT_INIT_ARRAY:    return "SHT_INIT_ARRAY";
 336                 case SHT_FINI_ARRAY:    return "SHT_FINI_ARRAY";
 337                 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
 338                 case SHT_GROUP:         return "SHT_GROUP";
 339                 case SHT_SYMTAB_SHNDX:  return "SHT_SYMTAB_SHNDX";
 340                 }
 341                 snprintf(unknown_buf, sizeof(unknown_buf),
 342                     "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
 343                 return (unknown_buf);
 344         } else if (sht < 0x70000000) {
 345                 /* 0x60000000-0x6fffffff operating system-specific semantics */
 346                 switch (sht) {
 347                 case 0x6ffffff0:        return "XXX:VERSYM";
 348                 case SHT_SUNW_dof:      return "SHT_SUNW_dof";
 349                 case SHT_GNU_HASH:      return "SHT_GNU_HASH";
 350                 case 0x6ffffff7:        return "SHT_GNU_LIBLIST";
 351                 case 0x6ffffffc:        return "XXX:VERDEF";
 352                 case SHT_SUNW_verdef:   return "SHT_SUNW(GNU)_verdef";
 353                 case SHT_SUNW_verneed:  return "SHT_SUNW(GNU)_verneed";
 354                 case SHT_SUNW_versym:   return "SHT_SUNW(GNU)_versym";
 355                 }
 356                 snprintf(unknown_buf, sizeof(unknown_buf),
 357                     "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
 358                      (uintmax_t)sht);
 359                 return (unknown_buf);
 360         } else if (sht < 0x80000000) {
 361                 /* 0x70000000-0x7fffffff processor-specific semantics */
 362                 switch (machine) {
 363                 case EM_ARM:
 364                         switch (sht) {
 365                         case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
 366                         case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
 367                         case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
 368                         case SHT_ARM_DEBUGOVERLAY:
 369                             return "SHT_ARM_DEBUGOVERLAY";
 370                         case SHT_ARM_OVERLAYSECTION:
 371                             return "SHT_ARM_OVERLAYSECTION";
 372                         }
 373                         break;
 374                 case EM_IA_64:
 375                         switch (sht) {
 376                         case 0x70000000: return "SHT_IA_64_EXT";
 377                         case 0x70000001: return "SHT_IA_64_UNWIND";
 378                         }
 379                         break;
 380                 case EM_MIPS:
 381                         switch (sht) {
 382                         case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
 383                         }
 384                         break;
 385                 }
 386                 switch (sht) {
 387                 case 0x7ffffffd: return "XXX:AUXILIARY";
 388                 case 0x7fffffff: return "XXX:FILTER";
 389                 }
 390                 snprintf(unknown_buf, sizeof(unknown_buf),
 391                     "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
 392                      (uintmax_t)sht);
 393                 return (unknown_buf);
 394         } else {
 395                 /* 0x80000000-0xffffffff application programs */
 396                 snprintf(unknown_buf, sizeof(unknown_buf),
 397                     "ERROR: SHT 0x%jx NOT DEFINED",
 398                      (uintmax_t)sht);
 399                 return (unknown_buf);
 400         }
 401 }
 402
 403 static const char *sh_flags[] = {
 404         "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
 405         "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
 406         "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
 407 };
 408
 409 static const char *st_types[] = {
 410         "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE"
 411 };
 412
 413 static const char *st_bindings[] = {
 414         "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
 415 };
 416
 417 static char *dynstr;
 418 static char *shstrtab;
 419 static char *strtab;
 420 static FILE *out;
 421
 422 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
 423 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
 424     elf_member_t member);
 425 #if 0
 426 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
 427 #endif
 428 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
 429 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
 430
 431 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
 432 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
 433 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
 434 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
 435 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
 436 static void elf_print_rel(Elf32_Ehdr *e, void *r);
 437 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
 438 static void elf_print_interp(Elf32_Ehdr *e, void *p);
 439 static void elf_print_got(Elf32_Ehdr *e, void *sh);
 440 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
 441 static void elf_print_note(Elf32_Ehdr *e, void *sh);
 442
 443 static void usage(void);
 444
 445 /*
 446  * Helpers for ELF files with shnum or shstrndx values that don't fit in the
 447  * ELF header.  If the values are too large then an escape value is used to
 448  * indicate that the actual value is found in one of section 0's fields.
 449  */
 450 static uint64_t
 451 elf_get_shnum(Elf32_Ehdr *e, void *sh)
 452 {
 453         uint64_t shnum;
 454
 455         shnum = elf_get_quarter(e, e, E_SHNUM);
 456         if (shnum == 0)
 457                 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
 458         return shnum;
 459 }
 460
 461 static uint64_t
 462 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
 463 {
 464         uint64_t shstrndx;
 465
 466         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 467         if (shstrndx == SHN_XINDEX)
 468                 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
 469         return shstrndx;
 470 }
 471
 472 int
 473 main(int ac, char **av)
 474 {
 475         cap_rights_t rights;
 476         u_int64_t phoff;
 477         u_int64_t shoff;
 478         u_int64_t phentsize;
 479         u_int64_t phnum;
 480         u_int64_t shentsize;
 481         u_int64_t shnum;
 482         u_int64_t shstrndx;
 483         u_int64_t offset;
 484         u_int64_t name;
 485         u_int64_t type;
 486         struct stat sb;
 487         u_int flags;
 488         Elf32_Ehdr *e;
 489         void *p;
 490         void *sh;
 491         void *v;
 492         int fd;
 493         int ch;
 494         int i;
 495
 496         out = stdout;
 497         flags = 0;
 498         while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
 499                 switch (ch) {
 500                 case 'a':
 501                         flags = ED_ALL;
 502                         break;
 503                 case 'c':
 504                         flags |= ED_SHDR;
 505                         break;
 506                 case 'd':
 507                         flags |= ED_DYN;
 508                         break;
 509                 case 'e':
 510                         flags |= ED_EHDR;
 511                         break;
 512                 case 'i':
 513                         flags |= ED_INTERP;
 514                         break;
 515                 case 'G':
 516                         flags |= ED_GOT;
 517                         break;
 518                 case 'h':
 519                         flags |= ED_HASH;
 520                         break;
 521                 case 'n':
 522                         flags |= ED_NOTE;
 523                         break;
 524                 case 'p':
 525                         flags |= ED_PHDR;
 526                         break;
 527                 case 'r':
 528                         flags |= ED_REL;
 529                         break;
 530                 case 's':
 531                         flags |= ED_SYMTAB;
 532                         break;
 533                 case 'w':
 534                         if ((out = fopen(optarg, "w")) == NULL)
 535                                 err(1, "%s", optarg);
 536                         cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
 537                         if (cap_rights_limit(fileno(out), &rights) < 0 && errno != ENOSYS)
 538                                 err(1, "unable to limit rights for %s", optarg);
 539                         break;
 540                 case '?':
 541                 default:
 542                         usage();
 543                 }
 544         ac -= optind;
 545         av += optind;
 546         if (ac == 0 || flags == 0)
 547                 usage();
 548         if ((fd = open(*av, O_RDONLY)) < 0 ||
 549             fstat(fd, &sb) < 0)
 550                 err(1, "%s", *av);
 551         cap_rights_init(&rights, CAP_MMAP_R);
 552         if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
 553                 err(1, "unable to limit rights for %s", *av);
 554         close(STDIN_FILENO);
 555         cap_rights_init(&rights, CAP_WRITE);
 556         if (cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS)
 557                 err(1, "unable to limit rights for stdout");
 558         if (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS)
 559                 err(1, "unable to limit rights for stderr");
 560         if (cap_enter() < 0 && errno != ENOSYS)
 561                 err(1, "unable to enter capability mode");
 562         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 563         if (e == MAP_FAILED)
 564                 err(1, NULL);
 565         if (!IS_ELF(*(Elf32_Ehdr *)e))
 566                 errx(1, "not an elf file");
 567         phoff = elf_get_off(e, e, E_PHOFF);
 568         shoff = elf_get_off(e, e, E_SHOFF);
 569         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 570         phnum = elf_get_quarter(e, e, E_PHNUM);
 571         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 572         p = (char *)e + phoff;
 573         if (shoff > 0) {
 574                 sh = (char *)e + shoff;
 575                 shnum = elf_get_shnum(e, sh);
 576                 shstrndx = elf_get_shstrndx(e, sh);
 577                 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
 578                     SH_OFFSET);
 579                 shstrtab = (char *)e + offset;
 580         } else {
 581                 sh = NULL;
 582                 shnum = 0;
 583                 shstrndx = 0;
 584                 shstrtab = NULL;
 585         }
 586         for (i = 0; (u_int64_t)i < shnum; i++) {
 587                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 588                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 589                 if (strcmp(shstrtab + name, ".strtab") == 0)
 590                         strtab = (char *)e + offset;
 591                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 592                         dynstr = (char *)e + offset;
 593         }
 594         if (flags & ED_EHDR)
 595                 elf_print_ehdr(e, sh);
 596         if (flags & ED_PHDR)
 597                 elf_print_phdr(e, p);
 598         if (flags & ED_SHDR)
 599                 elf_print_shdr(e, sh);
 600         for (i = 0; (u_int64_t)i < phnum; i++) {
 601                 v = (char *)p + i * phentsize;
 602                 type = elf_get_word(e, v, P_TYPE);
 603                 switch (type) {
 604                 case PT_INTERP:
 605                         if (flags & ED_INTERP)
 606                                 elf_print_interp(e, v);
 607                         break;
 608                 case PT_NULL:
 609                 case PT_LOAD:
 610                 case PT_DYNAMIC:
 611                 case PT_NOTE:
 612                 case PT_SHLIB:
 613                 case PT_PHDR:
 614                         break;
 615                 }
 616         }
 617         for (i = 0; (u_int64_t)i < shnum; i++) {
 618                 v = (char *)sh + i * shentsize;
 619                 type = elf_get_word(e, v, SH_TYPE);
 620                 switch (type) {
 621                 case SHT_SYMTAB:
 622                         if (flags & ED_SYMTAB)
 623                                 elf_print_symtab(e, v, strtab);
 624                         break;
 625                 case SHT_DYNAMIC:
 626                         if (flags & ED_DYN)
 627                                 elf_print_dynamic(e, v);
 628                         break;
 629                 case SHT_RELA:
 630                         if (flags & ED_REL)
 631                                 elf_print_rela(e, v);
 632                         break;
 633                 case SHT_REL:
 634                         if (flags & ED_REL)
 635                                 elf_print_rel(e, v);
 636                         break;
 637                 case SHT_NOTE:
 638                         name = elf_get_word(e, v, SH_NAME);
 639                         if (flags & ED_NOTE &&
 640                             strcmp(shstrtab + name, ".note.ABI-tag") == 0)
 641                                 elf_print_note(e, v);
 642                         break;
 643                 case SHT_DYNSYM:
 644                         if (flags & ED_SYMTAB)
 645                                 elf_print_symtab(e, v, dynstr);
 646                         break;
 647                 case SHT_PROGBITS:
 648                         name = elf_get_word(e, v, SH_NAME);
 649                         if (flags & ED_GOT &&
 650                             strcmp(shstrtab + name, ".got") == 0)
 651                                 elf_print_got(e, v);
 652                         break;
 653                 case SHT_HASH:
 654                         if (flags & ED_HASH)
 655                                 elf_print_hash(e, v);
 656                         break;
 657                 case SHT_NULL:
 658                 case SHT_STRTAB:
 659                 case SHT_NOBITS:
 660                 case SHT_SHLIB:
 661                         break;
 662                 }
 663         }
 664
 665         return 0;
 666 }
 667
 668 static void
 669 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
 670 {
 671         u_int64_t class;
 672         u_int64_t data;
 673         u_int64_t osabi;
 674         u_int64_t type;
 675         u_int64_t machine;
 676         u_int64_t version;
 677         u_int64_t entry;
 678         u_int64_t phoff;
 679         u_int64_t shoff;
 680         u_int64_t flags;
 681         u_int64_t ehsize;
 682         u_int64_t phentsize;
 683         u_int64_t phnum;
 684         u_int64_t shentsize;
 685         u_int64_t shnum;
 686         u_int64_t shstrndx;
 687
 688         class = elf_get_byte(e, e, E_CLASS);
 689         data = elf_get_byte(e, e, E_DATA);
 690         osabi = elf_get_byte(e, e, E_OSABI);
 691         type = elf_get_quarter(e, e, E_TYPE);
 692         machine = elf_get_quarter(e, e, E_MACHINE);
 693         version = elf_get_word(e, e, E_VERSION);
 694         entry = elf_get_addr(e, e, E_ENTRY);
 695         phoff = elf_get_off(e, e, E_PHOFF);
 696         shoff = elf_get_off(e, e, E_SHOFF);
 697         flags = elf_get_word(e, e, E_FLAGS);
 698         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 699         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 700         phnum = elf_get_quarter(e, e, E_PHNUM);
 701         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 702         fprintf(out, "\nelf header:\n");
 703         fprintf(out, "\n");
 704         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 705             ei_abis[osabi]);
 706         fprintf(out, "\te_type: %s\n", e_types[type]);
 707         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 708         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 709         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 710         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 711         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 712         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 713         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 714         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 715         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 716         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 717         if (sh != NULL) {
 718                 shnum = elf_get_shnum(e, sh);
 719                 shstrndx = elf_get_shstrndx(e, sh);
 720                 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 721                 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 722         }
 723 }
 724
 725 static void
 726 elf_print_phdr(Elf32_Ehdr *e, void *p)
 727 {
 728         u_int64_t phentsize;
 729         u_int64_t phnum;
 730         u_int64_t type;
 731         u_int64_t offset;
 732         u_int64_t vaddr;
 733         u_int64_t paddr;
 734         u_int64_t filesz;
 735         u_int64_t memsz;
 736         u_int64_t flags;
 737         u_int64_t align;
 738         void *v;
 739         int i;
 740
 741         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 742         phnum = elf_get_quarter(e, e, E_PHNUM);
 743         fprintf(out, "\nprogram header:\n");
 744         for (i = 0; (u_int64_t)i < phnum; i++) {
 745                 v = (char *)p + i * phentsize;
 746                 type = elf_get_word(e, v, P_TYPE);
 747                 offset = elf_get_off(e, v, P_OFFSET);
 748                 vaddr = elf_get_addr(e, v, P_VADDR);
 749                 paddr = elf_get_addr(e, v, P_PADDR);
 750                 filesz = elf_get_size(e, v, P_FILESZ);
 751                 memsz = elf_get_size(e, v, P_MEMSZ);
 752                 flags = elf_get_word(e, v, P_FLAGS);
 753                 align = elf_get_size(e, v, P_ALIGN);
 754                 fprintf(out, "\n");
 755                 fprintf(out, "entry: %d\n", i);
 756                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 757                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 758                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 759                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 760                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 761                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 762                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 763                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 764         }
 765 }
 766
 767 static void
 768 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 769 {
 770         u_int64_t shentsize;
 771         u_int64_t shnum;
 772         u_int64_t name;
 773         u_int64_t type;
 774         u_int64_t flags;
 775         u_int64_t addr;
 776         u_int64_t offset;
 777         u_int64_t size;
 778         u_int64_t shlink;
 779         u_int64_t info;
 780         u_int64_t addralign;
 781         u_int64_t entsize;
 782         u_int64_t machine;
 783         void *v;
 784         int i;
 785
 786         if (sh == NULL) {
 787                 fprintf(out, "\nNo section headers\n");
 788                 return;
 789         }
 790
 791         machine = elf_get_quarter(e, e, E_MACHINE);
 792         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 793         shnum = elf_get_shnum(e, sh);
 794         fprintf(out, "\nsection header:\n");
 795         for (i = 0; (u_int64_t)i < shnum; i++) {
 796                 v = (char *)sh + i * shentsize;
 797                 name = elf_get_word(e, v, SH_NAME);
 798                 type = elf_get_word(e, v, SH_TYPE);
 799                 flags = elf_get_word(e, v, SH_FLAGS);
 800                 addr = elf_get_addr(e, v, SH_ADDR);
 801                 offset = elf_get_off(e, v, SH_OFFSET);
 802                 size = elf_get_size(e, v, SH_SIZE);
 803                 shlink = elf_get_word(e, v, SH_LINK);
 804                 info = elf_get_word(e, v, SH_INFO);
 805                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 806                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 807                 fprintf(out, "\n");
 808                 fprintf(out, "entry: %d\n", i);
 809                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 810                 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
 811                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 812                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 813                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 814                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 815                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 816                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 817                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 818                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 819         }
 820 }
 821
 822 static void
 823 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 824 {
 825         u_int64_t offset;
 826         u_int64_t entsize;
 827         u_int64_t size;
 828         u_int64_t name;
 829         u_int64_t value;
 830         u_int64_t info;
 831         u_int64_t shndx;
 832         void *st;
 833         int len;
 834         int i;
 835
 836         offset = elf_get_off(e, sh, SH_OFFSET);
 837         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 838         size = elf_get_size(e, sh, SH_SIZE);
 839         name = elf_get_word(e, sh, SH_NAME);
 840         len = size / entsize;
 841         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 842         for (i = 0; i < len; i++) {
 843                 st = (char *)e + offset + i * entsize;
 844                 name = elf_get_word(e, st, ST_NAME);
 845                 value = elf_get_addr(e, st, ST_VALUE);
 846                 size = elf_get_size(e, st, ST_SIZE);
 847                 info = elf_get_byte(e, st, ST_INFO);
 848                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 849                 fprintf(out, "\n");
 850                 fprintf(out, "entry: %d\n", i);
 851                 fprintf(out, "\tst_name: %s\n", str + name);
 852                 fprintf(out, "\tst_value: %#jx\n", value);
 853                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 854                 fprintf(out, "\tst_info: %s %s\n",
 855                     st_types[ELF32_ST_TYPE(info)],
 856                     st_bindings[ELF32_ST_BIND(info)]);
 857                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 858         }
 859 }
 860
 861 static void
 862 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 863 {
 864         u_int64_t offset;
 865         u_int64_t entsize;
 866         u_int64_t size;
 867         int64_t tag;
 868         u_int64_t ptr;
 869         u_int64_t val;
 870         void *d;
 871         int i;
 872
 873         offset = elf_get_off(e, sh, SH_OFFSET);
 874         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 875         size = elf_get_size(e, sh, SH_SIZE);
 876         fprintf(out, "\ndynamic:\n");
 877         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 878                 d = (char *)e + offset + i * entsize;
 879                 tag = elf_get_size(e, d, D_TAG);
 880                 ptr = elf_get_size(e, d, D_PTR);
 881                 val = elf_get_addr(e, d, D_VAL);
 882                 fprintf(out, "\n");
 883                 fprintf(out, "entry: %d\n", i);
 884                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 885                 switch (tag) {
 886                 case DT_NEEDED:
 887                 case DT_SONAME:
 888                 case DT_RPATH:
 889                         fprintf(out, "\td_val: %s\n", dynstr + val);
 890                         break;
 891                 case DT_PLTRELSZ:
 892                 case DT_RELA:
 893                 case DT_RELASZ:
 894                 case DT_RELAENT:
 895                 case DT_STRSZ:
 896                 case DT_SYMENT:
 897                 case DT_RELSZ:
 898                 case DT_RELENT:
 899                 case DT_PLTREL:
 900                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 901                         break;
 902                 case DT_PLTGOT:
 903                 case DT_HASH:
 904                 case DT_STRTAB:
 905                 case DT_SYMTAB:
 906                 case DT_INIT:
 907                 case DT_FINI:
 908                 case DT_REL:
 909                 case DT_JMPREL:
 910                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 911                         break;
 912                 case DT_NULL:
 913                 case DT_SYMBOLIC:
 914                 case DT_DEBUG:
 915                 case DT_TEXTREL:
 916                         break;
 917                 }
 918         }
 919 }
 920
 921 static void
 922 elf_print_rela(Elf32_Ehdr *e, void *sh)
 923 {
 924         u_int64_t offset;
 925         u_int64_t entsize;
 926         u_int64_t size;
 927         u_int64_t name;
 928         u_int64_t info;
 929         int64_t addend;
 930         void *ra;
 931         void *v;
 932         int i;
 933
 934         offset = elf_get_off(e, sh, SH_OFFSET);
 935         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 936         size = elf_get_size(e, sh, SH_SIZE);
 937         name = elf_get_word(e, sh, SH_NAME);
 938         v = (char *)e + offset;
 939         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 940         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 941                 ra = (char *)v + i * entsize;
 942                 offset = elf_get_addr(e, ra, RA_OFFSET);
 943                 info = elf_get_word(e, ra, RA_INFO);
 944                 addend = elf_get_off(e, ra, RA_ADDEND);
 945                 fprintf(out, "\n");
 946                 fprintf(out, "entry: %d\n", i);
 947                 fprintf(out, "\tr_offset: %#jx\n", offset);
 948                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 949                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 950         }
 951 }
 952
 953 static void
 954 elf_print_rel(Elf32_Ehdr *e, void *sh)
 955 {
 956         u_int64_t offset;
 957         u_int64_t entsize;
 958         u_int64_t size;
 959         u_int64_t name;
 960         u_int64_t info;
 961         void *r;
 962         void *v;
 963         int i;
 964
 965         offset = elf_get_off(e, sh, SH_OFFSET);
 966         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 967         size = elf_get_size(e, sh, SH_SIZE);
 968         name = elf_get_word(e, sh, SH_NAME);
 969         v = (char *)e + offset;
 970         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
 971         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 972                 r = (char *)v + i * entsize;
 973                 offset = elf_get_addr(e, r, R_OFFSET);
 974                 info = elf_get_word(e, r, R_INFO);
 975                 fprintf(out, "\n");
 976                 fprintf(out, "entry: %d\n", i);
 977                 fprintf(out, "\tr_offset: %#jx\n", offset);
 978                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 979         }
 980 }
 981
 982 static void
 983 elf_print_interp(Elf32_Ehdr *e, void *p)
 984 {
 985         u_int64_t offset;
 986         char *s;
 987
 988         offset = elf_get_off(e, p, P_OFFSET);
 989         s = (char *)e + offset;
 990         fprintf(out, "\ninterp:\n");
 991         fprintf(out, "\t%s\n", s);
 992 }
 993
 994 static void
 995 elf_print_got(Elf32_Ehdr *e, void *sh)
 996 {
 997         u_int64_t offset;
 998         u_int64_t addralign;
 999         u_int64_t size;
1000         u_int64_t addr;
1001         void *v;
1002         int i;
1003
1004         offset = elf_get_off(e, sh, SH_OFFSET);
1005         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1006         size = elf_get_size(e, sh, SH_SIZE);
1007         v = (char *)e + offset;
1008         fprintf(out, "\nglobal offset table:\n");
1009         for (i = 0; (u_int64_t)i < size / addralign; i++) {
1010                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1011                 fprintf(out, "\n");
1012                 fprintf(out, "entry: %d\n", i);
1013                 fprintf(out, "\t%#jx\n", addr);
1014         }
1015 }
1016
1017 static void
1018 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1019 {
1020 }
1021
1022 static void
1023 elf_print_note(Elf32_Ehdr *e, void *sh)
1024 {
1025         u_int64_t offset;
1026         u_int64_t size;
1027         u_int64_t name;
1028         u_int32_t namesz;
1029         u_int32_t descsz;
1030         u_int32_t desc;
1031         char *n, *s;
1032
1033         offset = elf_get_off(e, sh, SH_OFFSET);
1034         size = elf_get_size(e, sh, SH_SIZE);
1035         name = elf_get_word(e, sh, SH_NAME);
1036         n = (char *)e + offset;
1037         fprintf(out, "\nnote (%s):\n", shstrtab + name);
1038         while (n < ((char *)e + offset + size)) {
1039                 namesz = elf_get_word(e, n, N_NAMESZ);
1040                 descsz = elf_get_word(e, n, N_DESCSZ);
1041                 s = n + sizeof(Elf_Note);
1042                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1043                 fprintf(out, "\t%s %d\n", s, desc);
1044                 n += sizeof(Elf_Note) + namesz + descsz;
1045         }
1046 }
1047
1048 static u_int64_t
1049 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1050 {
1051         u_int64_t val;
1052
1053         val = 0;
1054         switch (e->e_ident[EI_CLASS]) {
1055         case ELFCLASS32:
1056                 val = ((uint8_t *)base)[elf32_offsets[member]];
1057                 break;
1058         case ELFCLASS64:
1059                 val = ((uint8_t *)base)[elf64_offsets[member]];
1060                 break;
1061         case ELFCLASSNONE:
1062                 errx(1, "invalid class");
1063         }
1064
1065         return val;
1066 }
1067
1068 static u_int64_t
1069 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1070 {
1071         u_int64_t val;
1072
1073         val = 0;
1074         switch (e->e_ident[EI_CLASS]) {
1075         case ELFCLASS32:
1076                 base = (char *)base + elf32_offsets[member];
1077                 switch (e->e_ident[EI_DATA]) {
1078                 case ELFDATA2MSB:
1079                         val = be16dec(base);
1080                         break;
1081                 case ELFDATA2LSB:
1082                         val = le16dec(base);
1083                         break;
1084                 case ELFDATANONE:
1085                         errx(1, "invalid data format");
1086                 }
1087                 break;
1088         case ELFCLASS64:
1089                 base = (char *)base + elf64_offsets[member];
1090                 switch (e->e_ident[EI_DATA]) {
1091                 case ELFDATA2MSB:
1092                         val = be16dec(base);
1093                         break;
1094                 case ELFDATA2LSB:
1095                         val = le16dec(base);
1096                         break;
1097                 case ELFDATANONE:
1098                         errx(1, "invalid data format");
1099                 }
1100                 break;
1101         case ELFCLASSNONE:
1102                 errx(1, "invalid class");
1103         }
1104
1105         return val;
1106 }
1107
1108 #if 0
1109 static u_int64_t
1110 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1111 {
1112         u_int64_t val;
1113
1114         val = 0;
1115         switch (e->e_ident[EI_CLASS]) {
1116         case ELFCLASS32:
1117                 base = (char *)base + elf32_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 ELFCLASS64:
1130                 base = (char *)base + elf64_offsets[member];
1131                 switch (e->e_ident[EI_DATA]) {
1132                 case ELFDATA2MSB:
1133                         val = be32dec(base);
1134                         break;
1135                 case ELFDATA2LSB:
1136                         val = le32dec(base);
1137                         break;
1138                 case ELFDATANONE:
1139                         errx(1, "invalid data format");
1140                 }
1141                 break;
1142         case ELFCLASSNONE:
1143                 errx(1, "invalid class");
1144         }
1145
1146         return val;
1147 }
1148 #endif
1149
1150 static u_int64_t
1151 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1152 {
1153         u_int64_t val;
1154
1155         val = 0;
1156         switch (e->e_ident[EI_CLASS]) {
1157         case ELFCLASS32:
1158                 base = (char *)base + elf32_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 ELFCLASS64:
1171                 base = (char *)base + elf64_offsets[member];
1172                 switch (e->e_ident[EI_DATA]) {
1173                 case ELFDATA2MSB:
1174                         val = be32dec(base);
1175                         break;
1176                 case ELFDATA2LSB:
1177                         val = le32dec(base);
1178                         break;
1179                 case ELFDATANONE:
1180                         errx(1, "invalid data format");
1181                 }
1182                 break;
1183         case ELFCLASSNONE:
1184                 errx(1, "invalid class");
1185         }
1186
1187         return val;
1188 }
1189
1190 static u_int64_t
1191 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1192 {
1193         u_int64_t val;
1194
1195         val = 0;
1196         switch (e->e_ident[EI_CLASS]) {
1197         case ELFCLASS32:
1198                 base = (char *)base + elf32_offsets[member];
1199                 switch (e->e_ident[EI_DATA]) {
1200                 case ELFDATA2MSB:
1201                         val = be32dec(base);
1202                         break;
1203                 case ELFDATA2LSB:
1204                         val = le32dec(base);
1205                         break;
1206                 case ELFDATANONE:
1207                         errx(1, "invalid data format");
1208                 }
1209                 break;
1210         case ELFCLASS64:
1211                 base = (char *)base + elf64_offsets[member];
1212                 switch (e->e_ident[EI_DATA]) {
1213                 case ELFDATA2MSB:
1214                         val = be64dec(base);
1215                         break;
1216                 case ELFDATA2LSB:
1217                         val = le64dec(base);
1218                         break;
1219                 case ELFDATANONE:
1220                         errx(1, "invalid data format");
1221                 }
1222                 break;
1223         case ELFCLASSNONE:
1224                 errx(1, "invalid class");
1225         }
1226
1227         return val;
1228 }
1229
1230 static void
1231 usage(void)
1232 {
1233         fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");
1234         exit(1);
1235 }