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 <capsicum_helpers.h>
  42 #include <err.h>
  43 #include <errno.h>
  44 #include <fcntl.h>
  45 #include <inttypes.h>
  46 #include <stddef.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.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 #define ED_IS_ELF       (1<<10) /* Exclusive with other flags */
  64
  65 #define elf_get_addr    elf_get_quad
  66 #define elf_get_off     elf_get_quad
  67 #define elf_get_size    elf_get_quad
  68
  69 enum elf_member {
  70         D_TAG = 1, D_PTR, D_VAL,
  71
  72         E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
  73         E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
  74         E_SHNUM, E_SHSTRNDX,
  75
  76         N_NAMESZ, N_DESCSZ, N_TYPE,
  77
  78         P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
  79         P_ALIGN,
  80
  81         SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
  82         SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
  83
  84         ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
  85
  86         R_OFFSET, R_INFO,
  87
  88         RA_OFFSET, RA_INFO, RA_ADDEND
  89 };
  90
  91 typedef enum elf_member elf_member_t;
  92
  93 static int elf32_offsets[] = {
  94         0,
  95
  96         offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
  97         offsetof(Elf32_Dyn, d_un.d_val),
  98
  99         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
 100         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
 101         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
 102         offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
 103         offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
 104         offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
 105         offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
 106         offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
 107         offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
 108         offsetof(Elf32_Ehdr, e_shstrndx),
 109
 110         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 111         offsetof(Elf_Note, n_type),
 112
 113         offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
 114         offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
 115         offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
 116         offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
 117
 118         offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
 119         offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
 120         offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
 121         offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
 122         offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
 123
 124         offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
 125         offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
 126         offsetof(Elf32_Sym, st_shndx),
 127
 128         offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
 129
 130         offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
 131         offsetof(Elf32_Rela, r_addend)
 132 };
 133
 134 static int elf64_offsets[] = {
 135         0,
 136
 137         offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
 138         offsetof(Elf64_Dyn, d_un.d_val),
 139
 140         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
 141         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
 142         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
 143         offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
 144         offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
 145         offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
 146         offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
 147         offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
 148         offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
 149         offsetof(Elf64_Ehdr, e_shstrndx),
 150
 151         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 152         offsetof(Elf_Note, n_type),
 153
 154         offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
 155         offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
 156         offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
 157         offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
 158
 159         offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
 160         offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
 161         offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
 162         offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
 163         offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
 164
 165         offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
 166         offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
 167         offsetof(Elf64_Sym, st_shndx),
 168
 169         offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
 170
 171         offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
 172         offsetof(Elf64_Rela, r_addend)
 173 };
 174
 175 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
 176 static const char *
 177 d_tags(u_int64_t tag)
 178 {
 179         static char unknown_tag[48];
 180
 181         switch (tag) {
 182         case DT_NULL:           return "DT_NULL";
 183         case DT_NEEDED:         return "DT_NEEDED";
 184         case DT_PLTRELSZ:       return "DT_PLTRELSZ";
 185         case DT_PLTGOT:         return "DT_PLTGOT";
 186         case DT_HASH:           return "DT_HASH";
 187         case DT_STRTAB:         return "DT_STRTAB";
 188         case DT_SYMTAB:         return "DT_SYMTAB";
 189         case DT_RELA:           return "DT_RELA";
 190         case DT_RELASZ:         return "DT_RELASZ";
 191         case DT_RELAENT:        return "DT_RELAENT";
 192         case DT_STRSZ:          return "DT_STRSZ";
 193         case DT_SYMENT:         return "DT_SYMENT";
 194         case DT_INIT:           return "DT_INIT";
 195         case DT_FINI:           return "DT_FINI";
 196         case DT_SONAME:         return "DT_SONAME";
 197         case DT_RPATH:          return "DT_RPATH";
 198         case DT_SYMBOLIC:       return "DT_SYMBOLIC";
 199         case DT_REL:            return "DT_REL";
 200         case DT_RELSZ:          return "DT_RELSZ";
 201         case DT_RELENT:         return "DT_RELENT";
 202         case DT_PLTREL:         return "DT_PLTREL";
 203         case DT_DEBUG:          return "DT_DEBUG";
 204         case DT_TEXTREL:        return "DT_TEXTREL";
 205         case DT_JMPREL:         return "DT_JMPREL";
 206         case DT_BIND_NOW:       return "DT_BIND_NOW";
 207         case DT_INIT_ARRAY:     return "DT_INIT_ARRAY";
 208         case DT_FINI_ARRAY:     return "DT_FINI_ARRAY";
 209         case DT_INIT_ARRAYSZ:   return "DT_INIT_ARRAYSZ";
 210         case DT_FINI_ARRAYSZ:   return "DT_FINI_ARRAYSZ";
 211         case DT_RUNPATH:        return "DT_RUNPATH";
 212         case DT_FLAGS:          return "DT_FLAGS";
 213         case DT_PREINIT_ARRAY:  return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */
 214         case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ";
 215         /* 0x6000000D - 0x6ffff000 operating system-specific semantics */
 216         case 0x6ffffdf5:        return "DT_GNU_PRELINKED";
 217         case 0x6ffffdf6:        return "DT_GNU_CONFLICTSZ";
 218         case 0x6ffffdf7:        return "DT_GNU_LIBLISTSZ";
 219         case 0x6ffffdf8:        return "DT_SUNW_CHECKSUM";
 220         case DT_PLTPADSZ:       return "DT_PLTPADSZ";
 221         case DT_MOVEENT:        return "DT_MOVEENT";
 222         case DT_MOVESZ:         return "DT_MOVESZ";
 223         case DT_FEATURE:        return "DT_FEATURE";
 224         case DT_POSFLAG_1:      return "DT_POSFLAG_1";
 225         case DT_SYMINSZ:        return "DT_SYMINSZ";
 226         case DT_SYMINENT :      return "DT_SYMINENT (DT_VALRNGHI)";
 227         case DT_ADDRRNGLO:      return "DT_ADDRRNGLO";
 228         case DT_GNU_HASH:       return "DT_GNU_HASH";
 229         case 0x6ffffef8:        return "DT_GNU_CONFLICT";
 230         case 0x6ffffef9:        return "DT_GNU_LIBLIST";
 231         case DT_CONFIG:         return "DT_CONFIG";
 232         case DT_DEPAUDIT:       return "DT_DEPAUDIT";
 233         case DT_AUDIT:          return "DT_AUDIT";
 234         case DT_PLTPAD:         return "DT_PLTPAD";
 235         case DT_MOVETAB:        return "DT_MOVETAB";
 236         case DT_SYMINFO :       return "DT_SYMINFO (DT_ADDRRNGHI)";
 237         case DT_RELACOUNT:      return "DT_RELACOUNT";
 238         case DT_RELCOUNT:       return "DT_RELCOUNT";
 239         case DT_FLAGS_1:        return "DT_FLAGS_1";
 240         case DT_VERDEF:         return "DT_VERDEF";
 241         case DT_VERDEFNUM:      return "DT_VERDEFNUM";
 242         case DT_VERNEED:        return "DT_VERNEED";
 243         case DT_VERNEEDNUM:     return "DT_VERNEEDNUM";
 244         case 0x6ffffff0:        return "DT_GNU_VERSYM";
 245         /* 0x70000000 - 0x7fffffff processor-specific semantics */
 246         case 0x70000000:        return "DT_IA_64_PLT_RESERVE";
 247         case DT_AUXILIARY:      return "DT_AUXILIARY";
 248         case DT_USED:           return "DT_USED";
 249         case DT_FILTER:         return "DT_FILTER";
 250         }
 251         snprintf(unknown_tag, sizeof(unknown_tag),
 252                 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag);
 253         return (unknown_tag);
 254 }
 255
 256 static const char *
 257 e_machines(u_int mach)
 258 {
 259         static char machdesc[64];
 260
 261         switch (mach) {
 262         case EM_NONE:   return "EM_NONE";
 263         case EM_M32:    return "EM_M32";
 264         case EM_SPARC:  return "EM_SPARC";
 265         case EM_386:    return "EM_386";
 266         case EM_68K:    return "EM_68K";
 267         case EM_88K:    return "EM_88K";
 268         case EM_IAMCU:  return "EM_IAMCU";
 269         case EM_860:    return "EM_860";
 270         case EM_MIPS:   return "EM_MIPS";
 271         case EM_PPC:    return "EM_PPC";
 272         case EM_PPC64:  return "EM_PPC64";
 273         case EM_ARM:    return "EM_ARM";
 274         case EM_ALPHA:  return "EM_ALPHA (legacy)";
 275         case EM_SPARCV9:return "EM_SPARCV9";
 276         case EM_IA_64:  return "EM_IA_64";
 277         case EM_X86_64: return "EM_X86_64";
 278         case EM_AARCH64:return "EM_AARCH64";
 279         case EM_RISCV:  return "EM_RISCV";
 280         }
 281         snprintf(machdesc, sizeof(machdesc),
 282             "(unknown machine) -- type 0x%x", mach);
 283         return (machdesc);
 284 }
 285
 286 static const char *e_types[] = {
 287         "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
 288 };
 289
 290 static const char *ei_versions[] = {
 291         "EV_NONE", "EV_CURRENT"
 292 };
 293
 294 static const char *ei_classes[] = {
 295         "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
 296 };
 297
 298 static const char *ei_data[] = {
 299         "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
 300 };
 301
 302 static const char *ei_abis[256] = {
 303         "ELFOSABI_NONE", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
 304         "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
 305         "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
 306         "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
 307         [255] = "ELFOSABI_STANDALONE"
 308 };
 309
 310 static const char *p_types[] = {
 311         "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
 312         "PT_SHLIB", "PT_PHDR", "PT_TLS"
 313 };
 314
 315 static const char *p_flags[] = {
 316         "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
 317         "PF_X|PF_W|PF_R"
 318 };
 319
 320 #define NT_ELEM(x)      [x] = #x,
 321 static const char *nt_types[] = {
 322         "",
 323         NT_ELEM(NT_FREEBSD_ABI_TAG)
 324         NT_ELEM(NT_FREEBSD_NOINIT_TAG)
 325         NT_ELEM(NT_FREEBSD_ARCH_TAG)
 326         NT_ELEM(NT_FREEBSD_FEATURE_CTL)
 327 };
 328
 329 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
 330 static const char *
 331 sh_types(uint64_t machine, uint64_t sht) {
 332         static char unknown_buf[64];
 333
 334         if (sht < 0x60000000) {
 335                 switch (sht) {
 336                 case SHT_NULL:          return "SHT_NULL";
 337                 case SHT_PROGBITS:      return "SHT_PROGBITS";
 338                 case SHT_SYMTAB:        return "SHT_SYMTAB";
 339                 case SHT_STRTAB:        return "SHT_STRTAB";
 340                 case SHT_RELA:          return "SHT_RELA";
 341                 case SHT_HASH:          return "SHT_HASH";
 342                 case SHT_DYNAMIC:       return "SHT_DYNAMIC";
 343                 case SHT_NOTE:          return "SHT_NOTE";
 344                 case SHT_NOBITS:        return "SHT_NOBITS";
 345                 case SHT_REL:           return "SHT_REL";
 346                 case SHT_SHLIB:         return "SHT_SHLIB";
 347                 case SHT_DYNSYM:        return "SHT_DYNSYM";
 348                 case SHT_INIT_ARRAY:    return "SHT_INIT_ARRAY";
 349                 case SHT_FINI_ARRAY:    return "SHT_FINI_ARRAY";
 350                 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
 351                 case SHT_GROUP:         return "SHT_GROUP";
 352                 case SHT_SYMTAB_SHNDX:  return "SHT_SYMTAB_SHNDX";
 353                 }
 354                 snprintf(unknown_buf, sizeof(unknown_buf),
 355                     "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
 356                 return (unknown_buf);
 357         } else if (sht < 0x70000000) {
 358                 /* 0x60000000-0x6fffffff operating system-specific semantics */
 359                 switch (sht) {
 360                 case 0x6ffffff0:        return "XXX:VERSYM";
 361                 case SHT_SUNW_dof:      return "SHT_SUNW_dof";
 362                 case SHT_GNU_HASH:      return "SHT_GNU_HASH";
 363                 case 0x6ffffff7:        return "SHT_GNU_LIBLIST";
 364                 case 0x6ffffffc:        return "XXX:VERDEF";
 365                 case SHT_SUNW_verdef:   return "SHT_SUNW(GNU)_verdef";
 366                 case SHT_SUNW_verneed:  return "SHT_SUNW(GNU)_verneed";
 367                 case SHT_SUNW_versym:   return "SHT_SUNW(GNU)_versym";
 368                 }
 369                 snprintf(unknown_buf, sizeof(unknown_buf),
 370                     "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
 371                      (uintmax_t)sht);
 372                 return (unknown_buf);
 373         } else if (sht < 0x80000000) {
 374                 /* 0x70000000-0x7fffffff processor-specific semantics */
 375                 switch (machine) {
 376                 case EM_ARM:
 377                         switch (sht) {
 378                         case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
 379                         case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
 380                         case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
 381                         case SHT_ARM_DEBUGOVERLAY:
 382                             return "SHT_ARM_DEBUGOVERLAY";
 383                         case SHT_ARM_OVERLAYSECTION:
 384                             return "SHT_ARM_OVERLAYSECTION";
 385                         }
 386                         break;
 387                 case EM_IA_64:
 388                         switch (sht) {
 389                         case 0x70000000: return "SHT_IA_64_EXT";
 390                         case 0x70000001: return "SHT_IA_64_UNWIND";
 391                         }
 392                         break;
 393                 case EM_MIPS:
 394                         switch (sht) {
 395                         case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO";
 396                         case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
 397                         case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS";
 398                         }
 399                         break;
 400                 }
 401                 switch (sht) {
 402                 case 0x7ffffffd: return "XXX:AUXILIARY";
 403                 case 0x7fffffff: return "XXX:FILTER";
 404                 }
 405                 snprintf(unknown_buf, sizeof(unknown_buf),
 406                     "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
 407                      (uintmax_t)sht);
 408                 return (unknown_buf);
 409         } else {
 410                 /* 0x80000000-0xffffffff application programs */
 411                 snprintf(unknown_buf, sizeof(unknown_buf),
 412                     "ERROR: SHT 0x%jx NOT DEFINED",
 413                      (uintmax_t)sht);
 414                 return (unknown_buf);
 415         }
 416 }
 417
 418 static const char *sh_flags[] = {
 419         "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
 420         "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
 421         "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
 422 };
 423
 424 static const char *
 425 st_type(unsigned int mach, unsigned int type)
 426 {
 427         static char s_type[32];
 428
 429         switch (type) {
 430         case STT_NOTYPE: return "STT_NOTYPE";
 431         case STT_OBJECT: return "STT_OBJECT";
 432         case STT_FUNC: return "STT_FUNC";
 433         case STT_SECTION: return "STT_SECTION";
 434         case STT_FILE: return "STT_FILE";
 435         case STT_COMMON: return "STT_COMMON";
 436         case STT_TLS: return "STT_TLS";
 437         case 13:
 438                 if (mach == EM_SPARCV9)
 439                         return "STT_SPARC_REGISTER";
 440                 break;
 441         }
 442         snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type);
 443         return (s_type);
 444 }
 445
 446 static const char *st_bindings[] = {
 447         "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
 448 };
 449
 450 static char *dynstr;
 451 static char *shstrtab;
 452 static char *strtab;
 453 static FILE *out;
 454
 455 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
 456 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
 457     elf_member_t member);
 458 #if 0
 459 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
 460 #endif
 461 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
 462 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
 463
 464 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
 465 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
 466 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
 467 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
 468 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
 469 static void elf_print_rel(Elf32_Ehdr *e, void *r);
 470 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
 471 static void elf_print_interp(Elf32_Ehdr *e, void *p);
 472 static void elf_print_got(Elf32_Ehdr *e, void *sh);
 473 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
 474 static void elf_print_note(Elf32_Ehdr *e, void *sh);
 475
 476 static void usage(void);
 477
 478 /*
 479  * Helpers for ELF files with shnum or shstrndx values that don't fit in the
 480  * ELF header.  If the values are too large then an escape value is used to
 481  * indicate that the actual value is found in one of section 0's fields.
 482  */
 483 static uint64_t
 484 elf_get_shnum(Elf32_Ehdr *e, void *sh)
 485 {
 486         uint64_t shnum;
 487
 488         shnum = elf_get_quarter(e, e, E_SHNUM);
 489         if (shnum == 0)
 490                 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
 491         return shnum;
 492 }
 493
 494 static uint64_t
 495 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
 496 {
 497         uint64_t shstrndx;
 498
 499         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 500         if (shstrndx == SHN_XINDEX)
 501                 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
 502         return shstrndx;
 503 }
 504
 505 int
 506 main(int ac, char **av)
 507 {
 508         cap_rights_t rights;
 509         u_int64_t phoff;
 510         u_int64_t shoff;
 511         u_int64_t phentsize;
 512         u_int64_t phnum;
 513         u_int64_t shentsize;
 514         u_int64_t shnum;
 515         u_int64_t shstrndx;
 516         u_int64_t offset;
 517         u_int64_t name;
 518         u_int64_t type;
 519         struct stat sb;
 520         u_int flags;
 521         Elf32_Ehdr *e;
 522         void *p;
 523         void *sh;
 524         void *v;
 525         int fd;
 526         int ch;
 527         int i;
 528
 529         out = stdout;
 530         flags = 0;
 531         while ((ch = getopt(ac, av, "acdEeiGhnprsw:")) != -1)
 532                 switch (ch) {
 533                 case 'a':
 534                         flags = ED_ALL;
 535                         break;
 536                 case 'c':
 537                         flags |= ED_SHDR;
 538                         break;
 539                 case 'd':
 540                         flags |= ED_DYN;
 541                         break;
 542                 case 'E':
 543                         flags = ED_IS_ELF;
 544                         break;
 545                 case 'e':
 546                         flags |= ED_EHDR;
 547                         break;
 548                 case 'i':
 549                         flags |= ED_INTERP;
 550                         break;
 551                 case 'G':
 552                         flags |= ED_GOT;
 553                         break;
 554                 case 'h':
 555                         flags |= ED_HASH;
 556                         break;
 557                 case 'n':
 558                         flags |= ED_NOTE;
 559                         break;
 560                 case 'p':
 561                         flags |= ED_PHDR;
 562                         break;
 563                 case 'r':
 564                         flags |= ED_REL;
 565                         break;
 566                 case 's':
 567                         flags |= ED_SYMTAB;
 568                         break;
 569                 case 'w':
 570                         if ((out = fopen(optarg, "w")) == NULL)
 571                                 err(1, "%s", optarg);
 572                         cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
 573                         if (caph_rights_limit(fileno(out), &rights) < 0)
 574                                 err(1, "unable to limit rights for %s", optarg);
 575                         break;
 576                 case '?':
 577                 default:
 578                         usage();
 579                 }
 580         ac -= optind;
 581         av += optind;
 582         if (ac == 0 || flags == 0 || ((flags & ED_IS_ELF) &&
 583             (ac != 1 || (flags & ~ED_IS_ELF) || out != stdout)))
 584                 usage();
 585         if ((fd = open(*av, O_RDONLY)) < 0 ||
 586             fstat(fd, &sb) < 0)
 587                 err(1, "%s", *av);
 588         cap_rights_init(&rights, CAP_MMAP_R);
 589         if (caph_rights_limit(fd, &rights) < 0)
 590                 err(1, "unable to limit rights for %s", *av);
 591         cap_rights_init(&rights);
 592         if (caph_rights_limit(STDIN_FILENO, &rights) < 0 ||
 593             caph_limit_stdout() < 0 || caph_limit_stderr() < 0) {
 594                 err(1, "unable to limit rights for stdio");
 595         }
 596         if (caph_enter() < 0)
 597                 err(1, "unable to enter capability mode");
 598         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 599         if (e == MAP_FAILED)
 600                 err(1, NULL);
 601         if (!IS_ELF(*(Elf32_Ehdr *)e)) {
 602                 if (flags & ED_IS_ELF)
 603                         exit(1);
 604                 errx(1, "not an elf file");
 605         } else if (flags & ED_IS_ELF)
 606                 exit (0);
 607         phoff = elf_get_off(e, e, E_PHOFF);
 608         shoff = elf_get_off(e, e, E_SHOFF);
 609         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 610         phnum = elf_get_quarter(e, e, E_PHNUM);
 611         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 612         p = (char *)e + phoff;
 613         if (shoff > 0) {
 614                 sh = (char *)e + shoff;
 615                 shnum = elf_get_shnum(e, sh);
 616                 shstrndx = elf_get_shstrndx(e, sh);
 617                 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
 618                     SH_OFFSET);
 619                 shstrtab = (char *)e + offset;
 620         } else {
 621                 sh = NULL;
 622                 shnum = 0;
 623                 shstrndx = 0;
 624                 shstrtab = NULL;
 625         }
 626         for (i = 0; (u_int64_t)i < shnum; i++) {
 627                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 628                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 629                 if (strcmp(shstrtab + name, ".strtab") == 0)
 630                         strtab = (char *)e + offset;
 631                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 632                         dynstr = (char *)e + offset;
 633         }
 634         if (flags & ED_EHDR)
 635                 elf_print_ehdr(e, sh);
 636         if (flags & ED_PHDR)
 637                 elf_print_phdr(e, p);
 638         if (flags & ED_SHDR)
 639                 elf_print_shdr(e, sh);
 640         for (i = 0; (u_int64_t)i < phnum; i++) {
 641                 v = (char *)p + i * phentsize;
 642                 type = elf_get_word(e, v, P_TYPE);
 643                 switch (type) {
 644                 case PT_INTERP:
 645                         if (flags & ED_INTERP)
 646                                 elf_print_interp(e, v);
 647                         break;
 648                 case PT_NULL:
 649                 case PT_LOAD:
 650                 case PT_DYNAMIC:
 651                 case PT_NOTE:
 652                 case PT_SHLIB:
 653                 case PT_PHDR:
 654                         break;
 655                 }
 656         }
 657         for (i = 0; (u_int64_t)i < shnum; i++) {
 658                 v = (char *)sh + i * shentsize;
 659                 type = elf_get_word(e, v, SH_TYPE);
 660                 switch (type) {
 661                 case SHT_SYMTAB:
 662                         if (flags & ED_SYMTAB)
 663                                 elf_print_symtab(e, v, strtab);
 664                         break;
 665                 case SHT_DYNAMIC:
 666                         if (flags & ED_DYN)
 667                                 elf_print_dynamic(e, v);
 668                         break;
 669                 case SHT_RELA:
 670                         if (flags & ED_REL)
 671                                 elf_print_rela(e, v);
 672                         break;
 673                 case SHT_REL:
 674                         if (flags & ED_REL)
 675                                 elf_print_rel(e, v);
 676                         break;
 677                 case SHT_NOTE:
 678                         name = elf_get_word(e, v, SH_NAME);
 679                         if (flags & ED_NOTE &&
 680                             strcmp(shstrtab + name, ".note.tag") == 0)
 681                                 elf_print_note(e, v);
 682                         break;
 683                 case SHT_DYNSYM:
 684                         if (flags & ED_SYMTAB)
 685                                 elf_print_symtab(e, v, dynstr);
 686                         break;
 687                 case SHT_PROGBITS:
 688                         name = elf_get_word(e, v, SH_NAME);
 689                         if (flags & ED_GOT &&
 690                             strcmp(shstrtab + name, ".got") == 0)
 691                                 elf_print_got(e, v);
 692                         break;
 693                 case SHT_HASH:
 694                         if (flags & ED_HASH)
 695                                 elf_print_hash(e, v);
 696                         break;
 697                 case SHT_NULL:
 698                 case SHT_STRTAB:
 699                 case SHT_NOBITS:
 700                 case SHT_SHLIB:
 701                         break;
 702                 }
 703         }
 704
 705         return 0;
 706 }
 707
 708 static void
 709 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
 710 {
 711         u_int64_t class;
 712         u_int64_t data;
 713         u_int64_t osabi;
 714         u_int64_t type;
 715         u_int64_t machine;
 716         u_int64_t version;
 717         u_int64_t entry;
 718         u_int64_t phoff;
 719         u_int64_t shoff;
 720         u_int64_t flags;
 721         u_int64_t ehsize;
 722         u_int64_t phentsize;
 723         u_int64_t phnum;
 724         u_int64_t shentsize;
 725         u_int64_t shnum;
 726         u_int64_t shstrndx;
 727
 728         class = elf_get_byte(e, e, E_CLASS);
 729         data = elf_get_byte(e, e, E_DATA);
 730         osabi = elf_get_byte(e, e, E_OSABI);
 731         type = elf_get_quarter(e, e, E_TYPE);
 732         machine = elf_get_quarter(e, e, E_MACHINE);
 733         version = elf_get_word(e, e, E_VERSION);
 734         entry = elf_get_addr(e, e, E_ENTRY);
 735         phoff = elf_get_off(e, e, E_PHOFF);
 736         shoff = elf_get_off(e, e, E_SHOFF);
 737         flags = elf_get_word(e, e, E_FLAGS);
 738         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 739         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 740         phnum = elf_get_quarter(e, e, E_PHNUM);
 741         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 742         fprintf(out, "\nelf header:\n");
 743         fprintf(out, "\n");
 744         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 745             ei_abis[osabi]);
 746         fprintf(out, "\te_type: %s\n", e_types[type]);
 747         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 748         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 749         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 750         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 751         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 752         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 753         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 754         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 755         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 756         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 757         if (sh != NULL) {
 758                 shnum = elf_get_shnum(e, sh);
 759                 shstrndx = elf_get_shstrndx(e, sh);
 760                 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 761                 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 762         }
 763 }
 764
 765 static void
 766 elf_print_phdr(Elf32_Ehdr *e, void *p)
 767 {
 768         u_int64_t phentsize;
 769         u_int64_t phnum;
 770         u_int64_t type;
 771         u_int64_t offset;
 772         u_int64_t vaddr;
 773         u_int64_t paddr;
 774         u_int64_t filesz;
 775         u_int64_t memsz;
 776         u_int64_t flags;
 777         u_int64_t align;
 778         void *v;
 779         int i;
 780
 781         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 782         phnum = elf_get_quarter(e, e, E_PHNUM);
 783         fprintf(out, "\nprogram header:\n");
 784         for (i = 0; (u_int64_t)i < phnum; i++) {
 785                 v = (char *)p + i * phentsize;
 786                 type = elf_get_word(e, v, P_TYPE);
 787                 offset = elf_get_off(e, v, P_OFFSET);
 788                 vaddr = elf_get_addr(e, v, P_VADDR);
 789                 paddr = elf_get_addr(e, v, P_PADDR);
 790                 filesz = elf_get_size(e, v, P_FILESZ);
 791                 memsz = elf_get_size(e, v, P_MEMSZ);
 792                 flags = elf_get_word(e, v, P_FLAGS);
 793                 align = elf_get_size(e, v, P_ALIGN);
 794                 fprintf(out, "\n");
 795                 fprintf(out, "entry: %d\n", i);
 796                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 797                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 798                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 799                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 800                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 801                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 802                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 803                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 804         }
 805 }
 806
 807 static void
 808 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 809 {
 810         u_int64_t shentsize;
 811         u_int64_t shnum;
 812         u_int64_t name;
 813         u_int64_t type;
 814         u_int64_t flags;
 815         u_int64_t addr;
 816         u_int64_t offset;
 817         u_int64_t size;
 818         u_int64_t shlink;
 819         u_int64_t info;
 820         u_int64_t addralign;
 821         u_int64_t entsize;
 822         u_int64_t machine;
 823         void *v;
 824         int i;
 825
 826         if (sh == NULL) {
 827                 fprintf(out, "\nNo section headers\n");
 828                 return;
 829         }
 830
 831         machine = elf_get_quarter(e, e, E_MACHINE);
 832         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 833         shnum = elf_get_shnum(e, sh);
 834         fprintf(out, "\nsection header:\n");
 835         for (i = 0; (u_int64_t)i < shnum; i++) {
 836                 v = (char *)sh + i * shentsize;
 837                 name = elf_get_word(e, v, SH_NAME);
 838                 type = elf_get_word(e, v, SH_TYPE);
 839                 flags = elf_get_word(e, v, SH_FLAGS);
 840                 addr = elf_get_addr(e, v, SH_ADDR);
 841                 offset = elf_get_off(e, v, SH_OFFSET);
 842                 size = elf_get_size(e, v, SH_SIZE);
 843                 shlink = elf_get_word(e, v, SH_LINK);
 844                 info = elf_get_word(e, v, SH_INFO);
 845                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 846                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 847                 fprintf(out, "\n");
 848                 fprintf(out, "entry: %d\n", i);
 849                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 850                 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
 851                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 852                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 853                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 854                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 855                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 856                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 857                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 858                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 859         }
 860 }
 861
 862 static void
 863 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 864 {
 865         u_int64_t machine;
 866         u_int64_t offset;
 867         u_int64_t entsize;
 868         u_int64_t size;
 869         u_int64_t name;
 870         u_int64_t value;
 871         u_int64_t info;
 872         u_int64_t shndx;
 873         void *st;
 874         int len;
 875         int i;
 876
 877         machine = elf_get_quarter(e, e, E_MACHINE);
 878         offset = elf_get_off(e, sh, SH_OFFSET);
 879         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 880         size = elf_get_size(e, sh, SH_SIZE);
 881         name = elf_get_word(e, sh, SH_NAME);
 882         len = size / entsize;
 883         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 884         for (i = 0; i < len; i++) {
 885                 st = (char *)e + offset + i * entsize;
 886                 name = elf_get_word(e, st, ST_NAME);
 887                 value = elf_get_addr(e, st, ST_VALUE);
 888                 size = elf_get_size(e, st, ST_SIZE);
 889                 info = elf_get_byte(e, st, ST_INFO);
 890                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 891                 fprintf(out, "\n");
 892                 fprintf(out, "entry: %d\n", i);
 893                 fprintf(out, "\tst_name: %s\n", str + name);
 894                 fprintf(out, "\tst_value: %#jx\n", value);
 895                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 896                 fprintf(out, "\tst_info: %s %s\n",
 897                     st_type(machine, ELF32_ST_TYPE(info)),
 898                     st_bindings[ELF32_ST_BIND(info)]);
 899                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 900         }
 901 }
 902
 903 static void
 904 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 905 {
 906         u_int64_t offset;
 907         u_int64_t entsize;
 908         u_int64_t size;
 909         int64_t tag;
 910         u_int64_t ptr;
 911         u_int64_t val;
 912         void *d;
 913         int i;
 914
 915         offset = elf_get_off(e, sh, SH_OFFSET);
 916         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 917         size = elf_get_size(e, sh, SH_SIZE);
 918         fprintf(out, "\ndynamic:\n");
 919         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 920                 d = (char *)e + offset + i * entsize;
 921                 tag = elf_get_size(e, d, D_TAG);
 922                 ptr = elf_get_size(e, d, D_PTR);
 923                 val = elf_get_addr(e, d, D_VAL);
 924                 fprintf(out, "\n");
 925                 fprintf(out, "entry: %d\n", i);
 926                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 927                 switch (tag) {
 928                 case DT_NEEDED:
 929                 case DT_SONAME:
 930                 case DT_RPATH:
 931                         fprintf(out, "\td_val: %s\n", dynstr + val);
 932                         break;
 933                 case DT_PLTRELSZ:
 934                 case DT_RELA:
 935                 case DT_RELASZ:
 936                 case DT_RELAENT:
 937                 case DT_STRSZ:
 938                 case DT_SYMENT:
 939                 case DT_RELSZ:
 940                 case DT_RELENT:
 941                 case DT_PLTREL:
 942                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 943                         break;
 944                 case DT_PLTGOT:
 945                 case DT_HASH:
 946                 case DT_STRTAB:
 947                 case DT_SYMTAB:
 948                 case DT_INIT:
 949                 case DT_FINI:
 950                 case DT_REL:
 951                 case DT_JMPREL:
 952                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 953                         break;
 954                 case DT_NULL:
 955                 case DT_SYMBOLIC:
 956                 case DT_DEBUG:
 957                 case DT_TEXTREL:
 958                         break;
 959                 }
 960         }
 961 }
 962
 963 static void
 964 elf_print_rela(Elf32_Ehdr *e, void *sh)
 965 {
 966         u_int64_t offset;
 967         u_int64_t entsize;
 968         u_int64_t size;
 969         u_int64_t name;
 970         u_int64_t info;
 971         int64_t addend;
 972         void *ra;
 973         void *v;
 974         int i;
 975
 976         offset = elf_get_off(e, sh, SH_OFFSET);
 977         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 978         size = elf_get_size(e, sh, SH_SIZE);
 979         name = elf_get_word(e, sh, SH_NAME);
 980         v = (char *)e + offset;
 981         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 982         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 983                 ra = (char *)v + i * entsize;
 984                 offset = elf_get_addr(e, ra, RA_OFFSET);
 985                 info = elf_get_word(e, ra, RA_INFO);
 986                 addend = elf_get_off(e, ra, RA_ADDEND);
 987                 fprintf(out, "\n");
 988                 fprintf(out, "entry: %d\n", i);
 989                 fprintf(out, "\tr_offset: %#jx\n", offset);
 990                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 991                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 992         }
 993 }
 994
 995 static void
 996 elf_print_rel(Elf32_Ehdr *e, void *sh)
 997 {
 998         u_int64_t offset;
 999         u_int64_t entsize;
1000         u_int64_t size;
1001         u_int64_t name;
1002         u_int64_t info;
1003         void *r;
1004         void *v;
1005         int i;
1006
1007         offset = elf_get_off(e, sh, SH_OFFSET);
1008         entsize = elf_get_size(e, sh, SH_ENTSIZE);
1009         size = elf_get_size(e, sh, SH_SIZE);
1010         name = elf_get_word(e, sh, SH_NAME);
1011         v = (char *)e + offset;
1012         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
1013         for (i = 0; (u_int64_t)i < size / entsize; i++) {
1014                 r = (char *)v + i * entsize;
1015                 offset = elf_get_addr(e, r, R_OFFSET);
1016                 info = elf_get_word(e, r, R_INFO);
1017                 fprintf(out, "\n");
1018                 fprintf(out, "entry: %d\n", i);
1019                 fprintf(out, "\tr_offset: %#jx\n", offset);
1020                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
1021         }
1022 }
1023
1024 static void
1025 elf_print_interp(Elf32_Ehdr *e, void *p)
1026 {
1027         u_int64_t offset;
1028         char *s;
1029
1030         offset = elf_get_off(e, p, P_OFFSET);
1031         s = (char *)e + offset;
1032         fprintf(out, "\ninterp:\n");
1033         fprintf(out, "\t%s\n", s);
1034 }
1035
1036 static void
1037 elf_print_got(Elf32_Ehdr *e, void *sh)
1038 {
1039         u_int64_t offset;
1040         u_int64_t addralign;
1041         u_int64_t size;
1042         u_int64_t addr;
1043         void *v;
1044         int i;
1045
1046         offset = elf_get_off(e, sh, SH_OFFSET);
1047         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1048         size = elf_get_size(e, sh, SH_SIZE);
1049         v = (char *)e + offset;
1050         fprintf(out, "\nglobal offset table:\n");
1051         for (i = 0; (u_int64_t)i < size / addralign; i++) {
1052                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1053                 fprintf(out, "\n");
1054                 fprintf(out, "entry: %d\n", i);
1055                 fprintf(out, "\t%#jx\n", addr);
1056         }
1057 }
1058
1059 static void
1060 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1061 {
1062 }
1063
1064 static void
1065 elf_print_note(Elf32_Ehdr *e, void *sh)
1066 {
1067         u_int64_t offset;
1068         u_int64_t size;
1069         u_int64_t name;
1070         u_int32_t namesz;
1071         u_int32_t descsz;
1072         u_int32_t desc;
1073         u_int32_t type;
1074         char *n, *s;
1075         const char *nt_type;
1076
1077         offset = elf_get_off(e, sh, SH_OFFSET);
1078         size = elf_get_size(e, sh, SH_SIZE);
1079         name = elf_get_word(e, sh, SH_NAME);
1080         n = (char *)e + offset;
1081         fprintf(out, "\nnote (%s):\n", shstrtab + name);
1082         while (n < ((char *)e + offset + size)) {
1083                 namesz = elf_get_word(e, n, N_NAMESZ);
1084                 descsz = elf_get_word(e, n, N_DESCSZ);
1085                 type = elf_get_word(e, n, N_TYPE);
1086                 if (type < nitems(nt_types) && nt_types[type] != NULL)
1087                         nt_type = nt_types[type];
1088                 else
1089                         nt_type = "Unknown type";
1090                 s = n + sizeof(Elf_Note);
1091                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1092                 fprintf(out, "\t%s %d (%s)\n", s, desc, nt_type);
1093                 n += sizeof(Elf_Note) + namesz + descsz;
1094         }
1095 }
1096
1097 static u_int64_t
1098 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1099 {
1100         u_int64_t val;
1101
1102         val = 0;
1103         switch (e->e_ident[EI_CLASS]) {
1104         case ELFCLASS32:
1105                 val = ((uint8_t *)base)[elf32_offsets[member]];
1106                 break;
1107         case ELFCLASS64:
1108                 val = ((uint8_t *)base)[elf64_offsets[member]];
1109                 break;
1110         case ELFCLASSNONE:
1111                 errx(1, "invalid class");
1112         }
1113
1114         return val;
1115 }
1116
1117 static u_int64_t
1118 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1119 {
1120         u_int64_t val;
1121
1122         val = 0;
1123         switch (e->e_ident[EI_CLASS]) {
1124         case ELFCLASS32:
1125                 base = (char *)base + elf32_offsets[member];
1126                 switch (e->e_ident[EI_DATA]) {
1127                 case ELFDATA2MSB:
1128                         val = be16dec(base);
1129                         break;
1130                 case ELFDATA2LSB:
1131                         val = le16dec(base);
1132                         break;
1133                 case ELFDATANONE:
1134                         errx(1, "invalid data format");
1135                 }
1136                 break;
1137         case ELFCLASS64:
1138                 base = (char *)base + elf64_offsets[member];
1139                 switch (e->e_ident[EI_DATA]) {
1140                 case ELFDATA2MSB:
1141                         val = be16dec(base);
1142                         break;
1143                 case ELFDATA2LSB:
1144                         val = le16dec(base);
1145                         break;
1146                 case ELFDATANONE:
1147                         errx(1, "invalid data format");
1148                 }
1149                 break;
1150         case ELFCLASSNONE:
1151                 errx(1, "invalid class");
1152         }
1153
1154         return val;
1155 }
1156
1157 #if 0
1158 static u_int64_t
1159 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1160 {
1161         u_int64_t val;
1162
1163         val = 0;
1164         switch (e->e_ident[EI_CLASS]) {
1165         case ELFCLASS32:
1166                 base = (char *)base + elf32_offsets[member];
1167                 switch (e->e_ident[EI_DATA]) {
1168                 case ELFDATA2MSB:
1169                         val = be16dec(base);
1170                         break;
1171                 case ELFDATA2LSB:
1172                         val = le16dec(base);
1173                         break;
1174                 case ELFDATANONE:
1175                         errx(1, "invalid data format");
1176                 }
1177                 break;
1178         case ELFCLASS64:
1179                 base = (char *)base + elf64_offsets[member];
1180                 switch (e->e_ident[EI_DATA]) {
1181                 case ELFDATA2MSB:
1182                         val = be32dec(base);
1183                         break;
1184                 case ELFDATA2LSB:
1185                         val = le32dec(base);
1186                         break;
1187                 case ELFDATANONE:
1188                         errx(1, "invalid data format");
1189                 }
1190                 break;
1191         case ELFCLASSNONE:
1192                 errx(1, "invalid class");
1193         }
1194
1195         return val;
1196 }
1197 #endif
1198
1199 static u_int64_t
1200 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1201 {
1202         u_int64_t val;
1203
1204         val = 0;
1205         switch (e->e_ident[EI_CLASS]) {
1206         case ELFCLASS32:
1207                 base = (char *)base + elf32_offsets[member];
1208                 switch (e->e_ident[EI_DATA]) {
1209                 case ELFDATA2MSB:
1210                         val = be32dec(base);
1211                         break;
1212                 case ELFDATA2LSB:
1213                         val = le32dec(base);
1214                         break;
1215                 case ELFDATANONE:
1216                         errx(1, "invalid data format");
1217                 }
1218                 break;
1219         case ELFCLASS64:
1220                 base = (char *)base + elf64_offsets[member];
1221                 switch (e->e_ident[EI_DATA]) {
1222                 case ELFDATA2MSB:
1223                         val = be32dec(base);
1224                         break;
1225                 case ELFDATA2LSB:
1226                         val = le32dec(base);
1227                         break;
1228                 case ELFDATANONE:
1229                         errx(1, "invalid data format");
1230                 }
1231                 break;
1232         case ELFCLASSNONE:
1233                 errx(1, "invalid class");
1234         }
1235
1236         return val;
1237 }
1238
1239 static u_int64_t
1240 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1241 {
1242         u_int64_t val;
1243
1244         val = 0;
1245         switch (e->e_ident[EI_CLASS]) {
1246         case ELFCLASS32:
1247                 base = (char *)base + elf32_offsets[member];
1248                 switch (e->e_ident[EI_DATA]) {
1249                 case ELFDATA2MSB:
1250                         val = be32dec(base);
1251                         break;
1252                 case ELFDATA2LSB:
1253                         val = le32dec(base);
1254                         break;
1255                 case ELFDATANONE:
1256                         errx(1, "invalid data format");
1257                 }
1258                 break;
1259         case ELFCLASS64:
1260                 base = (char *)base + elf64_offsets[member];
1261                 switch (e->e_ident[EI_DATA]) {
1262                 case ELFDATA2MSB:
1263                         val = be64dec(base);
1264                         break;
1265                 case ELFDATA2LSB:
1266                         val = le64dec(base);
1267                         break;
1268                 case ELFDATANONE:
1269                         errx(1, "invalid data format");
1270                 }
1271                 break;
1272         case ELFCLASSNONE:
1273                 errx(1, "invalid class");
1274         }
1275
1276         return val;
1277 }
1278
1279 static void
1280 usage(void)
1281 {
1282         fprintf(stderr,
1283             "usage: elfdump -a | -E | -cdeGhinprs [-w file] file\n");
1284         exit(1);
1285 }