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         if ((size_t)sb.st_size < sizeof(Elf32_Ehdr)) {
 589                 if (flags & ED_IS_ELF)
 590                         exit(1);
 591                 errx(1, "not an elf file");
 592         }
 593         cap_rights_init(&rights, CAP_MMAP_R);
 594         if (caph_rights_limit(fd, &rights) < 0)
 595                 err(1, "unable to limit rights for %s", *av);
 596         cap_rights_init(&rights);
 597         if (caph_rights_limit(STDIN_FILENO, &rights) < 0 ||
 598             caph_limit_stdout() < 0 || caph_limit_stderr() < 0) {
 599                 err(1, "unable to limit rights for stdio");
 600         }
 601         if (caph_enter() < 0)
 602                 err(1, "unable to enter capability mode");
 603         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 604         if (e == MAP_FAILED)
 605                 err(1, NULL);
 606         if (!IS_ELF(*e)) {
 607                 if (flags & ED_IS_ELF)
 608                         exit(1);
 609                 errx(1, "not an elf file");
 610         } else if (flags & ED_IS_ELF)
 611                 exit (0);
 612         phoff = elf_get_off(e, e, E_PHOFF);
 613         shoff = elf_get_off(e, e, E_SHOFF);
 614         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 615         phnum = elf_get_quarter(e, e, E_PHNUM);
 616         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 617         p = (char *)e + phoff;
 618         if (shoff > 0) {
 619                 sh = (char *)e + shoff;
 620                 shnum = elf_get_shnum(e, sh);
 621                 shstrndx = elf_get_shstrndx(e, sh);
 622                 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
 623                     SH_OFFSET);
 624                 shstrtab = (char *)e + offset;
 625         } else {
 626                 sh = NULL;
 627                 shnum = 0;
 628                 shstrndx = 0;
 629                 shstrtab = NULL;
 630         }
 631         for (i = 0; (u_int64_t)i < shnum; i++) {
 632                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 633                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 634                 if (strcmp(shstrtab + name, ".strtab") == 0)
 635                         strtab = (char *)e + offset;
 636                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 637                         dynstr = (char *)e + offset;
 638         }
 639         if (flags & ED_EHDR)
 640                 elf_print_ehdr(e, sh);
 641         if (flags & ED_PHDR)
 642                 elf_print_phdr(e, p);
 643         if (flags & ED_SHDR)
 644                 elf_print_shdr(e, sh);
 645         for (i = 0; (u_int64_t)i < phnum; i++) {
 646                 v = (char *)p + i * phentsize;
 647                 type = elf_get_word(e, v, P_TYPE);
 648                 switch (type) {
 649                 case PT_INTERP:
 650                         if (flags & ED_INTERP)
 651                                 elf_print_interp(e, v);
 652                         break;
 653                 case PT_NULL:
 654                 case PT_LOAD:
 655                 case PT_DYNAMIC:
 656                 case PT_NOTE:
 657                 case PT_SHLIB:
 658                 case PT_PHDR:
 659                         break;
 660                 }
 661         }
 662         for (i = 0; (u_int64_t)i < shnum; i++) {
 663                 v = (char *)sh + i * shentsize;
 664                 type = elf_get_word(e, v, SH_TYPE);
 665                 switch (type) {
 666                 case SHT_SYMTAB:
 667                         if (flags & ED_SYMTAB)
 668                                 elf_print_symtab(e, v, strtab);
 669                         break;
 670                 case SHT_DYNAMIC:
 671                         if (flags & ED_DYN)
 672                                 elf_print_dynamic(e, v);
 673                         break;
 674                 case SHT_RELA:
 675                         if (flags & ED_REL)
 676                                 elf_print_rela(e, v);
 677                         break;
 678                 case SHT_REL:
 679                         if (flags & ED_REL)
 680                                 elf_print_rel(e, v);
 681                         break;
 682                 case SHT_NOTE:
 683                         name = elf_get_word(e, v, SH_NAME);
 684                         if (flags & ED_NOTE &&
 685                             strcmp(shstrtab + name, ".note.tag") == 0)
 686                                 elf_print_note(e, v);
 687                         break;
 688                 case SHT_DYNSYM:
 689                         if (flags & ED_SYMTAB)
 690                                 elf_print_symtab(e, v, dynstr);
 691                         break;
 692                 case SHT_PROGBITS:
 693                         name = elf_get_word(e, v, SH_NAME);
 694                         if (flags & ED_GOT &&
 695                             strcmp(shstrtab + name, ".got") == 0)
 696                                 elf_print_got(e, v);
 697                         break;
 698                 case SHT_HASH:
 699                         if (flags & ED_HASH)
 700                                 elf_print_hash(e, v);
 701                         break;
 702                 case SHT_NULL:
 703                 case SHT_STRTAB:
 704                 case SHT_NOBITS:
 705                 case SHT_SHLIB:
 706                         break;
 707                 }
 708         }
 709
 710         return 0;
 711 }
 712
 713 static void
 714 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
 715 {
 716         u_int64_t class;
 717         u_int64_t data;
 718         u_int64_t osabi;
 719         u_int64_t type;
 720         u_int64_t machine;
 721         u_int64_t version;
 722         u_int64_t entry;
 723         u_int64_t phoff;
 724         u_int64_t shoff;
 725         u_int64_t flags;
 726         u_int64_t ehsize;
 727         u_int64_t phentsize;
 728         u_int64_t phnum;
 729         u_int64_t shentsize;
 730         u_int64_t shnum;
 731         u_int64_t shstrndx;
 732
 733         class = elf_get_byte(e, e, E_CLASS);
 734         data = elf_get_byte(e, e, E_DATA);
 735         osabi = elf_get_byte(e, e, E_OSABI);
 736         type = elf_get_quarter(e, e, E_TYPE);
 737         machine = elf_get_quarter(e, e, E_MACHINE);
 738         version = elf_get_word(e, e, E_VERSION);
 739         entry = elf_get_addr(e, e, E_ENTRY);
 740         phoff = elf_get_off(e, e, E_PHOFF);
 741         shoff = elf_get_off(e, e, E_SHOFF);
 742         flags = elf_get_word(e, e, E_FLAGS);
 743         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 744         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 745         phnum = elf_get_quarter(e, e, E_PHNUM);
 746         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 747         fprintf(out, "\nelf header:\n");
 748         fprintf(out, "\n");
 749         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 750             ei_abis[osabi]);
 751         fprintf(out, "\te_type: %s\n", e_types[type]);
 752         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 753         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 754         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 755         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 756         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 757         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 758         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 759         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 760         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 761         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 762         if (sh != NULL) {
 763                 shnum = elf_get_shnum(e, sh);
 764                 shstrndx = elf_get_shstrndx(e, sh);
 765                 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 766                 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 767         }
 768 }
 769
 770 static void
 771 elf_print_phdr(Elf32_Ehdr *e, void *p)
 772 {
 773         u_int64_t phentsize;
 774         u_int64_t phnum;
 775         u_int64_t type;
 776         u_int64_t offset;
 777         u_int64_t vaddr;
 778         u_int64_t paddr;
 779         u_int64_t filesz;
 780         u_int64_t memsz;
 781         u_int64_t flags;
 782         u_int64_t align;
 783         void *v;
 784         int i;
 785
 786         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 787         phnum = elf_get_quarter(e, e, E_PHNUM);
 788         fprintf(out, "\nprogram header:\n");
 789         for (i = 0; (u_int64_t)i < phnum; i++) {
 790                 v = (char *)p + i * phentsize;
 791                 type = elf_get_word(e, v, P_TYPE);
 792                 offset = elf_get_off(e, v, P_OFFSET);
 793                 vaddr = elf_get_addr(e, v, P_VADDR);
 794                 paddr = elf_get_addr(e, v, P_PADDR);
 795                 filesz = elf_get_size(e, v, P_FILESZ);
 796                 memsz = elf_get_size(e, v, P_MEMSZ);
 797                 flags = elf_get_word(e, v, P_FLAGS);
 798                 align = elf_get_size(e, v, P_ALIGN);
 799                 fprintf(out, "\n");
 800                 fprintf(out, "entry: %d\n", i);
 801                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 802                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 803                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 804                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 805                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 806                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 807                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 808                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 809         }
 810 }
 811
 812 static void
 813 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 814 {
 815         u_int64_t shentsize;
 816         u_int64_t shnum;
 817         u_int64_t name;
 818         u_int64_t type;
 819         u_int64_t flags;
 820         u_int64_t addr;
 821         u_int64_t offset;
 822         u_int64_t size;
 823         u_int64_t shlink;
 824         u_int64_t info;
 825         u_int64_t addralign;
 826         u_int64_t entsize;
 827         u_int64_t machine;
 828         void *v;
 829         int i;
 830
 831         if (sh == NULL) {
 832                 fprintf(out, "\nNo section headers\n");
 833                 return;
 834         }
 835
 836         machine = elf_get_quarter(e, e, E_MACHINE);
 837         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 838         shnum = elf_get_shnum(e, sh);
 839         fprintf(out, "\nsection header:\n");
 840         for (i = 0; (u_int64_t)i < shnum; i++) {
 841                 v = (char *)sh + i * shentsize;
 842                 name = elf_get_word(e, v, SH_NAME);
 843                 type = elf_get_word(e, v, SH_TYPE);
 844                 flags = elf_get_word(e, v, SH_FLAGS);
 845                 addr = elf_get_addr(e, v, SH_ADDR);
 846                 offset = elf_get_off(e, v, SH_OFFSET);
 847                 size = elf_get_size(e, v, SH_SIZE);
 848                 shlink = elf_get_word(e, v, SH_LINK);
 849                 info = elf_get_word(e, v, SH_INFO);
 850                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 851                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 852                 fprintf(out, "\n");
 853                 fprintf(out, "entry: %d\n", i);
 854                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 855                 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
 856                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 857                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 858                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 859                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 860                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 861                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 862                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 863                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 864         }
 865 }
 866
 867 static void
 868 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 869 {
 870         u_int64_t machine;
 871         u_int64_t offset;
 872         u_int64_t entsize;
 873         u_int64_t size;
 874         u_int64_t name;
 875         u_int64_t value;
 876         u_int64_t info;
 877         u_int64_t shndx;
 878         void *st;
 879         int len;
 880         int i;
 881
 882         machine = elf_get_quarter(e, e, E_MACHINE);
 883         offset = elf_get_off(e, sh, SH_OFFSET);
 884         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 885         size = elf_get_size(e, sh, SH_SIZE);
 886         name = elf_get_word(e, sh, SH_NAME);
 887         len = size / entsize;
 888         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 889         for (i = 0; i < len; i++) {
 890                 st = (char *)e + offset + i * entsize;
 891                 name = elf_get_word(e, st, ST_NAME);
 892                 value = elf_get_addr(e, st, ST_VALUE);
 893                 size = elf_get_size(e, st, ST_SIZE);
 894                 info = elf_get_byte(e, st, ST_INFO);
 895                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 896                 fprintf(out, "\n");
 897                 fprintf(out, "entry: %d\n", i);
 898                 fprintf(out, "\tst_name: %s\n", str + name);
 899                 fprintf(out, "\tst_value: %#jx\n", value);
 900                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 901                 fprintf(out, "\tst_info: %s %s\n",
 902                     st_type(machine, ELF32_ST_TYPE(info)),
 903                     st_bindings[ELF32_ST_BIND(info)]);
 904                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 905         }
 906 }
 907
 908 static void
 909 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 910 {
 911         u_int64_t offset;
 912         u_int64_t entsize;
 913         u_int64_t size;
 914         int64_t tag;
 915         u_int64_t ptr;
 916         u_int64_t val;
 917         void *d;
 918         int i;
 919
 920         offset = elf_get_off(e, sh, SH_OFFSET);
 921         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 922         size = elf_get_size(e, sh, SH_SIZE);
 923         fprintf(out, "\ndynamic:\n");
 924         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 925                 d = (char *)e + offset + i * entsize;
 926                 tag = elf_get_size(e, d, D_TAG);
 927                 ptr = elf_get_size(e, d, D_PTR);
 928                 val = elf_get_addr(e, d, D_VAL);
 929                 fprintf(out, "\n");
 930                 fprintf(out, "entry: %d\n", i);
 931                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 932                 switch (tag) {
 933                 case DT_NEEDED:
 934                 case DT_SONAME:
 935                 case DT_RPATH:
 936                         fprintf(out, "\td_val: %s\n", dynstr + val);
 937                         break;
 938                 case DT_PLTRELSZ:
 939                 case DT_RELA:
 940                 case DT_RELASZ:
 941                 case DT_RELAENT:
 942                 case DT_STRSZ:
 943                 case DT_SYMENT:
 944                 case DT_RELSZ:
 945                 case DT_RELENT:
 946                 case DT_PLTREL:
 947                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 948                         break;
 949                 case DT_PLTGOT:
 950                 case DT_HASH:
 951                 case DT_STRTAB:
 952                 case DT_SYMTAB:
 953                 case DT_INIT:
 954                 case DT_FINI:
 955                 case DT_REL:
 956                 case DT_JMPREL:
 957                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 958                         break;
 959                 case DT_NULL:
 960                 case DT_SYMBOLIC:
 961                 case DT_DEBUG:
 962                 case DT_TEXTREL:
 963                         break;
 964                 }
 965         }
 966 }
 967
 968 static void
 969 elf_print_rela(Elf32_Ehdr *e, void *sh)
 970 {
 971         u_int64_t offset;
 972         u_int64_t entsize;
 973         u_int64_t size;
 974         u_int64_t name;
 975         u_int64_t info;
 976         int64_t addend;
 977         void *ra;
 978         void *v;
 979         int i;
 980
 981         offset = elf_get_off(e, sh, SH_OFFSET);
 982         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 983         size = elf_get_size(e, sh, SH_SIZE);
 984         name = elf_get_word(e, sh, SH_NAME);
 985         v = (char *)e + offset;
 986         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 987         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 988                 ra = (char *)v + i * entsize;
 989                 offset = elf_get_addr(e, ra, RA_OFFSET);
 990                 info = elf_get_word(e, ra, RA_INFO);
 991                 addend = elf_get_off(e, ra, RA_ADDEND);
 992                 fprintf(out, "\n");
 993                 fprintf(out, "entry: %d\n", i);
 994                 fprintf(out, "\tr_offset: %#jx\n", offset);
 995                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 996                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 997         }
 998 }
 999
1000 static void
1001 elf_print_rel(Elf32_Ehdr *e, void *sh)
1002 {
1003         u_int64_t offset;
1004         u_int64_t entsize;
1005         u_int64_t size;
1006         u_int64_t name;
1007         u_int64_t info;
1008         void *r;
1009         void *v;
1010         int i;
1011
1012         offset = elf_get_off(e, sh, SH_OFFSET);
1013         entsize = elf_get_size(e, sh, SH_ENTSIZE);
1014         size = elf_get_size(e, sh, SH_SIZE);
1015         name = elf_get_word(e, sh, SH_NAME);
1016         v = (char *)e + offset;
1017         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
1018         for (i = 0; (u_int64_t)i < size / entsize; i++) {
1019                 r = (char *)v + i * entsize;
1020                 offset = elf_get_addr(e, r, R_OFFSET);
1021                 info = elf_get_word(e, r, R_INFO);
1022                 fprintf(out, "\n");
1023                 fprintf(out, "entry: %d\n", i);
1024                 fprintf(out, "\tr_offset: %#jx\n", offset);
1025                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
1026         }
1027 }
1028
1029 static void
1030 elf_print_interp(Elf32_Ehdr *e, void *p)
1031 {
1032         u_int64_t offset;
1033         char *s;
1034
1035         offset = elf_get_off(e, p, P_OFFSET);
1036         s = (char *)e + offset;
1037         fprintf(out, "\ninterp:\n");
1038         fprintf(out, "\t%s\n", s);
1039 }
1040
1041 static void
1042 elf_print_got(Elf32_Ehdr *e, void *sh)
1043 {
1044         u_int64_t offset;
1045         u_int64_t addralign;
1046         u_int64_t size;
1047         u_int64_t addr;
1048         void *v;
1049         int i;
1050
1051         offset = elf_get_off(e, sh, SH_OFFSET);
1052         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1053         size = elf_get_size(e, sh, SH_SIZE);
1054         v = (char *)e + offset;
1055         fprintf(out, "\nglobal offset table:\n");
1056         for (i = 0; (u_int64_t)i < size / addralign; i++) {
1057                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1058                 fprintf(out, "\n");
1059                 fprintf(out, "entry: %d\n", i);
1060                 fprintf(out, "\t%#jx\n", addr);
1061         }
1062 }
1063
1064 static void
1065 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1066 {
1067 }
1068
1069 static void
1070 elf_print_note(Elf32_Ehdr *e, void *sh)
1071 {
1072         u_int64_t offset;
1073         u_int64_t size;
1074         u_int64_t name;
1075         u_int32_t namesz;
1076         u_int32_t descsz;
1077         u_int32_t desc;
1078         u_int32_t type;
1079         char *n, *s;
1080         const char *nt_type;
1081
1082         offset = elf_get_off(e, sh, SH_OFFSET);
1083         size = elf_get_size(e, sh, SH_SIZE);
1084         name = elf_get_word(e, sh, SH_NAME);
1085         n = (char *)e + offset;
1086         fprintf(out, "\nnote (%s):\n", shstrtab + name);
1087         while (n < ((char *)e + offset + size)) {
1088                 namesz = elf_get_word(e, n, N_NAMESZ);
1089                 descsz = elf_get_word(e, n, N_DESCSZ);
1090                 type = elf_get_word(e, n, N_TYPE);
1091                 if (type < nitems(nt_types) && nt_types[type] != NULL)
1092                         nt_type = nt_types[type];
1093                 else
1094                         nt_type = "Unknown type";
1095                 s = n + sizeof(Elf_Note);
1096                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1097                 fprintf(out, "\t%s %d (%s)\n", s, desc, nt_type);
1098                 n += sizeof(Elf_Note) + namesz + descsz;
1099         }
1100 }
1101
1102 static u_int64_t
1103 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1104 {
1105         u_int64_t val;
1106
1107         val = 0;
1108         switch (e->e_ident[EI_CLASS]) {
1109         case ELFCLASS32:
1110                 val = ((uint8_t *)base)[elf32_offsets[member]];
1111                 break;
1112         case ELFCLASS64:
1113                 val = ((uint8_t *)base)[elf64_offsets[member]];
1114                 break;
1115         case ELFCLASSNONE:
1116                 errx(1, "invalid class");
1117         }
1118
1119         return val;
1120 }
1121
1122 static u_int64_t
1123 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1124 {
1125         u_int64_t val;
1126
1127         val = 0;
1128         switch (e->e_ident[EI_CLASS]) {
1129         case ELFCLASS32:
1130                 base = (char *)base + elf32_offsets[member];
1131                 switch (e->e_ident[EI_DATA]) {
1132                 case ELFDATA2MSB:
1133                         val = be16dec(base);
1134                         break;
1135                 case ELFDATA2LSB:
1136                         val = le16dec(base);
1137                         break;
1138                 case ELFDATANONE:
1139                         errx(1, "invalid data format");
1140                 }
1141                 break;
1142         case ELFCLASS64:
1143                 base = (char *)base + elf64_offsets[member];
1144                 switch (e->e_ident[EI_DATA]) {
1145                 case ELFDATA2MSB:
1146                         val = be16dec(base);
1147                         break;
1148                 case ELFDATA2LSB:
1149                         val = le16dec(base);
1150                         break;
1151                 case ELFDATANONE:
1152                         errx(1, "invalid data format");
1153                 }
1154                 break;
1155         case ELFCLASSNONE:
1156                 errx(1, "invalid class");
1157         }
1158
1159         return val;
1160 }
1161
1162 #if 0
1163 static u_int64_t
1164 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1165 {
1166         u_int64_t val;
1167
1168         val = 0;
1169         switch (e->e_ident[EI_CLASS]) {
1170         case ELFCLASS32:
1171                 base = (char *)base + elf32_offsets[member];
1172                 switch (e->e_ident[EI_DATA]) {
1173                 case ELFDATA2MSB:
1174                         val = be16dec(base);
1175                         break;
1176                 case ELFDATA2LSB:
1177                         val = le16dec(base);
1178                         break;
1179                 case ELFDATANONE:
1180                         errx(1, "invalid data format");
1181                 }
1182                 break;
1183         case ELFCLASS64:
1184                 base = (char *)base + elf64_offsets[member];
1185                 switch (e->e_ident[EI_DATA]) {
1186                 case ELFDATA2MSB:
1187                         val = be32dec(base);
1188                         break;
1189                 case ELFDATA2LSB:
1190                         val = le32dec(base);
1191                         break;
1192                 case ELFDATANONE:
1193                         errx(1, "invalid data format");
1194                 }
1195                 break;
1196         case ELFCLASSNONE:
1197                 errx(1, "invalid class");
1198         }
1199
1200         return val;
1201 }
1202 #endif
1203
1204 static u_int64_t
1205 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1206 {
1207         u_int64_t val;
1208
1209         val = 0;
1210         switch (e->e_ident[EI_CLASS]) {
1211         case ELFCLASS32:
1212                 base = (char *)base + elf32_offsets[member];
1213                 switch (e->e_ident[EI_DATA]) {
1214                 case ELFDATA2MSB:
1215                         val = be32dec(base);
1216                         break;
1217                 case ELFDATA2LSB:
1218                         val = le32dec(base);
1219                         break;
1220                 case ELFDATANONE:
1221                         errx(1, "invalid data format");
1222                 }
1223                 break;
1224         case ELFCLASS64:
1225                 base = (char *)base + elf64_offsets[member];
1226                 switch (e->e_ident[EI_DATA]) {
1227                 case ELFDATA2MSB:
1228                         val = be32dec(base);
1229                         break;
1230                 case ELFDATA2LSB:
1231                         val = le32dec(base);
1232                         break;
1233                 case ELFDATANONE:
1234                         errx(1, "invalid data format");
1235                 }
1236                 break;
1237         case ELFCLASSNONE:
1238                 errx(1, "invalid class");
1239         }
1240
1241         return val;
1242 }
1243
1244 static u_int64_t
1245 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1246 {
1247         u_int64_t val;
1248
1249         val = 0;
1250         switch (e->e_ident[EI_CLASS]) {
1251         case ELFCLASS32:
1252                 base = (char *)base + elf32_offsets[member];
1253                 switch (e->e_ident[EI_DATA]) {
1254                 case ELFDATA2MSB:
1255                         val = be32dec(base);
1256                         break;
1257                 case ELFDATA2LSB:
1258                         val = le32dec(base);
1259                         break;
1260                 case ELFDATANONE:
1261                         errx(1, "invalid data format");
1262                 }
1263                 break;
1264         case ELFCLASS64:
1265                 base = (char *)base + elf64_offsets[member];
1266                 switch (e->e_ident[EI_DATA]) {
1267                 case ELFDATA2MSB:
1268                         val = be64dec(base);
1269                         break;
1270                 case ELFDATA2LSB:
1271                         val = le64dec(base);
1272                         break;
1273                 case ELFDATANONE:
1274                         errx(1, "invalid data format");
1275                 }
1276                 break;
1277         case ELFCLASSNONE:
1278                 errx(1, "invalid class");
1279         }
1280
1281         return val;
1282 }
1283
1284 static void
1285 usage(void)
1286 {
1287         fprintf(stderr,
1288             "usage: elfdump -a | -E | -cdeGhinprs [-w file] file\n");
1289         exit(1);
1290 }