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 static const char *nt_types[] = {
 321         "", "NT_FREEBSD_ABI_TAG", "NT_FREEBSD_NOINIT_TAG",
 322         "NT_FREEBSD_ARCH_TAG", "NT_FREEBSD_FEATURE_CTL"
 323 };
 324
 325 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
 326 static const char *
 327 sh_types(uint64_t machine, uint64_t sht) {
 328         static char unknown_buf[64];
 329
 330         if (sht < 0x60000000) {
 331                 switch (sht) {
 332                 case SHT_NULL:          return "SHT_NULL";
 333                 case SHT_PROGBITS:      return "SHT_PROGBITS";
 334                 case SHT_SYMTAB:        return "SHT_SYMTAB";
 335                 case SHT_STRTAB:        return "SHT_STRTAB";
 336                 case SHT_RELA:          return "SHT_RELA";
 337                 case SHT_HASH:          return "SHT_HASH";
 338                 case SHT_DYNAMIC:       return "SHT_DYNAMIC";
 339                 case SHT_NOTE:          return "SHT_NOTE";
 340                 case SHT_NOBITS:        return "SHT_NOBITS";
 341                 case SHT_REL:           return "SHT_REL";
 342                 case SHT_SHLIB:         return "SHT_SHLIB";
 343                 case SHT_DYNSYM:        return "SHT_DYNSYM";
 344                 case SHT_INIT_ARRAY:    return "SHT_INIT_ARRAY";
 345                 case SHT_FINI_ARRAY:    return "SHT_FINI_ARRAY";
 346                 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
 347                 case SHT_GROUP:         return "SHT_GROUP";
 348                 case SHT_SYMTAB_SHNDX:  return "SHT_SYMTAB_SHNDX";
 349                 }
 350                 snprintf(unknown_buf, sizeof(unknown_buf),
 351                     "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
 352                 return (unknown_buf);
 353         } else if (sht < 0x70000000) {
 354                 /* 0x60000000-0x6fffffff operating system-specific semantics */
 355                 switch (sht) {
 356                 case 0x6ffffff0:        return "XXX:VERSYM";
 357                 case SHT_SUNW_dof:      return "SHT_SUNW_dof";
 358                 case SHT_GNU_HASH:      return "SHT_GNU_HASH";
 359                 case 0x6ffffff7:        return "SHT_GNU_LIBLIST";
 360                 case 0x6ffffffc:        return "XXX:VERDEF";
 361                 case SHT_SUNW_verdef:   return "SHT_SUNW(GNU)_verdef";
 362                 case SHT_SUNW_verneed:  return "SHT_SUNW(GNU)_verneed";
 363                 case SHT_SUNW_versym:   return "SHT_SUNW(GNU)_versym";
 364                 }
 365                 snprintf(unknown_buf, sizeof(unknown_buf),
 366                     "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
 367                      (uintmax_t)sht);
 368                 return (unknown_buf);
 369         } else if (sht < 0x80000000) {
 370                 /* 0x70000000-0x7fffffff processor-specific semantics */
 371                 switch (machine) {
 372                 case EM_ARM:
 373                         switch (sht) {
 374                         case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
 375                         case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
 376                         case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
 377                         case SHT_ARM_DEBUGOVERLAY:
 378                             return "SHT_ARM_DEBUGOVERLAY";
 379                         case SHT_ARM_OVERLAYSECTION:
 380                             return "SHT_ARM_OVERLAYSECTION";
 381                         }
 382                         break;
 383                 case EM_IA_64:
 384                         switch (sht) {
 385                         case 0x70000000: return "SHT_IA_64_EXT";
 386                         case 0x70000001: return "SHT_IA_64_UNWIND";
 387                         }
 388                         break;
 389                 case EM_MIPS:
 390                         switch (sht) {
 391                         case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO";
 392                         case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
 393                         case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS";
 394                         }
 395                         break;
 396                 }
 397                 switch (sht) {
 398                 case 0x7ffffffd: return "XXX:AUXILIARY";
 399                 case 0x7fffffff: return "XXX:FILTER";
 400                 }
 401                 snprintf(unknown_buf, sizeof(unknown_buf),
 402                     "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
 403                      (uintmax_t)sht);
 404                 return (unknown_buf);
 405         } else {
 406                 /* 0x80000000-0xffffffff application programs */
 407                 snprintf(unknown_buf, sizeof(unknown_buf),
 408                     "ERROR: SHT 0x%jx NOT DEFINED",
 409                      (uintmax_t)sht);
 410                 return (unknown_buf);
 411         }
 412 }
 413
 414 static const char *sh_flags[] = {
 415         "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
 416         "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
 417         "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
 418 };
 419
 420 static const char *
 421 st_type(unsigned int mach, unsigned int type)
 422 {
 423         static char s_type[32];
 424
 425         switch (type) {
 426         case STT_NOTYPE: return "STT_NOTYPE";
 427         case STT_OBJECT: return "STT_OBJECT";
 428         case STT_FUNC: return "STT_FUNC";
 429         case STT_SECTION: return "STT_SECTION";
 430         case STT_FILE: return "STT_FILE";
 431         case STT_COMMON: return "STT_COMMON";
 432         case STT_TLS: return "STT_TLS";
 433         case 13:
 434                 if (mach == EM_SPARCV9)
 435                         return "STT_SPARC_REGISTER";
 436                 break;
 437         }
 438         snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type);
 439         return (s_type);
 440 }
 441
 442 static const char *st_bindings[] = {
 443         "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
 444 };
 445
 446 static char *dynstr;
 447 static char *shstrtab;
 448 static char *strtab;
 449 static FILE *out;
 450
 451 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
 452 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
 453     elf_member_t member);
 454 #if 0
 455 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
 456 #endif
 457 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
 458 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
 459
 460 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
 461 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
 462 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
 463 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
 464 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
 465 static void elf_print_rel(Elf32_Ehdr *e, void *r);
 466 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
 467 static void elf_print_interp(Elf32_Ehdr *e, void *p);
 468 static void elf_print_got(Elf32_Ehdr *e, void *sh);
 469 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
 470 static void elf_print_note(Elf32_Ehdr *e, void *sh);
 471
 472 static void usage(void);
 473
 474 /*
 475  * Helpers for ELF files with shnum or shstrndx values that don't fit in the
 476  * ELF header.  If the values are too large then an escape value is used to
 477  * indicate that the actual value is found in one of section 0's fields.
 478  */
 479 static uint64_t
 480 elf_get_shnum(Elf32_Ehdr *e, void *sh)
 481 {
 482         uint64_t shnum;
 483
 484         shnum = elf_get_quarter(e, e, E_SHNUM);
 485         if (shnum == 0)
 486                 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
 487         return shnum;
 488 }
 489
 490 static uint64_t
 491 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
 492 {
 493         uint64_t shstrndx;
 494
 495         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 496         if (shstrndx == SHN_XINDEX)
 497                 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
 498         return shstrndx;
 499 }
 500
 501 int
 502 main(int ac, char **av)
 503 {
 504         cap_rights_t rights;
 505         u_int64_t phoff;
 506         u_int64_t shoff;
 507         u_int64_t phentsize;
 508         u_int64_t phnum;
 509         u_int64_t shentsize;
 510         u_int64_t shnum;
 511         u_int64_t shstrndx;
 512         u_int64_t offset;
 513         u_int64_t name;
 514         u_int64_t type;
 515         struct stat sb;
 516         u_int flags;
 517         Elf32_Ehdr *e;
 518         void *p;
 519         void *sh;
 520         void *v;
 521         int fd;
 522         int ch;
 523         int i;
 524
 525         out = stdout;
 526         flags = 0;
 527         while ((ch = getopt(ac, av, "acdEeiGhnprsw:")) != -1)
 528                 switch (ch) {
 529                 case 'a':
 530                         flags = ED_ALL;
 531                         break;
 532                 case 'c':
 533                         flags |= ED_SHDR;
 534                         break;
 535                 case 'd':
 536                         flags |= ED_DYN;
 537                         break;
 538                 case 'E':
 539                         flags = ED_IS_ELF;
 540                         break;
 541                 case 'e':
 542                         flags |= ED_EHDR;
 543                         break;
 544                 case 'i':
 545                         flags |= ED_INTERP;
 546                         break;
 547                 case 'G':
 548                         flags |= ED_GOT;
 549                         break;
 550                 case 'h':
 551                         flags |= ED_HASH;
 552                         break;
 553                 case 'n':
 554                         flags |= ED_NOTE;
 555                         break;
 556                 case 'p':
 557                         flags |= ED_PHDR;
 558                         break;
 559                 case 'r':
 560                         flags |= ED_REL;
 561                         break;
 562                 case 's':
 563                         flags |= ED_SYMTAB;
 564                         break;
 565                 case 'w':
 566                         if ((out = fopen(optarg, "w")) == NULL)
 567                                 err(1, "%s", optarg);
 568                         cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
 569                         if (caph_rights_limit(fileno(out), &rights) < 0)
 570                                 err(1, "unable to limit rights for %s", optarg);
 571                         break;
 572                 case '?':
 573                 default:
 574                         usage();
 575                 }
 576         ac -= optind;
 577         av += optind;
 578         if (ac == 0 || flags == 0 || ((flags & ED_IS_ELF) &&
 579             (ac != 1 || (flags & ~ED_IS_ELF) || out != stdout)))
 580                 usage();
 581         if ((fd = open(*av, O_RDONLY)) < 0 ||
 582             fstat(fd, &sb) < 0)
 583                 err(1, "%s", *av);
 584         cap_rights_init(&rights, CAP_MMAP_R);
 585         if (caph_rights_limit(fd, &rights) < 0)
 586                 err(1, "unable to limit rights for %s", *av);
 587         cap_rights_init(&rights);
 588         if (caph_rights_limit(STDIN_FILENO, &rights) < 0 ||
 589             caph_limit_stdout() < 0 || caph_limit_stderr() < 0) {
 590                 err(1, "unable to limit rights for stdio");
 591         }
 592         if (caph_enter() < 0)
 593                 err(1, "unable to enter capability mode");
 594         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 595         if (e == MAP_FAILED)
 596                 err(1, NULL);
 597         if (!IS_ELF(*(Elf32_Ehdr *)e)) {
 598                 if (flags & ED_IS_ELF)
 599                         exit(1);
 600                 errx(1, "not an elf file");
 601         } else if (flags & ED_IS_ELF)
 602                 exit (0);
 603         phoff = elf_get_off(e, e, E_PHOFF);
 604         shoff = elf_get_off(e, e, E_SHOFF);
 605         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 606         phnum = elf_get_quarter(e, e, E_PHNUM);
 607         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 608         p = (char *)e + phoff;
 609         if (shoff > 0) {
 610                 sh = (char *)e + shoff;
 611                 shnum = elf_get_shnum(e, sh);
 612                 shstrndx = elf_get_shstrndx(e, sh);
 613                 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
 614                     SH_OFFSET);
 615                 shstrtab = (char *)e + offset;
 616         } else {
 617                 sh = NULL;
 618                 shnum = 0;
 619                 shstrndx = 0;
 620                 shstrtab = NULL;
 621         }
 622         for (i = 0; (u_int64_t)i < shnum; i++) {
 623                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 624                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 625                 if (strcmp(shstrtab + name, ".strtab") == 0)
 626                         strtab = (char *)e + offset;
 627                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 628                         dynstr = (char *)e + offset;
 629         }
 630         if (flags & ED_EHDR)
 631                 elf_print_ehdr(e, sh);
 632         if (flags & ED_PHDR)
 633                 elf_print_phdr(e, p);
 634         if (flags & ED_SHDR)
 635                 elf_print_shdr(e, sh);
 636         for (i = 0; (u_int64_t)i < phnum; i++) {
 637                 v = (char *)p + i * phentsize;
 638                 type = elf_get_word(e, v, P_TYPE);
 639                 switch (type) {
 640                 case PT_INTERP:
 641                         if (flags & ED_INTERP)
 642                                 elf_print_interp(e, v);
 643                         break;
 644                 case PT_NULL:
 645                 case PT_LOAD:
 646                 case PT_DYNAMIC:
 647                 case PT_NOTE:
 648                 case PT_SHLIB:
 649                 case PT_PHDR:
 650                         break;
 651                 }
 652         }
 653         for (i = 0; (u_int64_t)i < shnum; i++) {
 654                 v = (char *)sh + i * shentsize;
 655                 type = elf_get_word(e, v, SH_TYPE);
 656                 switch (type) {
 657                 case SHT_SYMTAB:
 658                         if (flags & ED_SYMTAB)
 659                                 elf_print_symtab(e, v, strtab);
 660                         break;
 661                 case SHT_DYNAMIC:
 662                         if (flags & ED_DYN)
 663                                 elf_print_dynamic(e, v);
 664                         break;
 665                 case SHT_RELA:
 666                         if (flags & ED_REL)
 667                                 elf_print_rela(e, v);
 668                         break;
 669                 case SHT_REL:
 670                         if (flags & ED_REL)
 671                                 elf_print_rel(e, v);
 672                         break;
 673                 case SHT_NOTE:
 674                         name = elf_get_word(e, v, SH_NAME);
 675                         if (flags & ED_NOTE &&
 676                             strcmp(shstrtab + name, ".note.tag") == 0)
 677                                 elf_print_note(e, v);
 678                         break;
 679                 case SHT_DYNSYM:
 680                         if (flags & ED_SYMTAB)
 681                                 elf_print_symtab(e, v, dynstr);
 682                         break;
 683                 case SHT_PROGBITS:
 684                         name = elf_get_word(e, v, SH_NAME);
 685                         if (flags & ED_GOT &&
 686                             strcmp(shstrtab + name, ".got") == 0)
 687                                 elf_print_got(e, v);
 688                         break;
 689                 case SHT_HASH:
 690                         if (flags & ED_HASH)
 691                                 elf_print_hash(e, v);
 692                         break;
 693                 case SHT_NULL:
 694                 case SHT_STRTAB:
 695                 case SHT_NOBITS:
 696                 case SHT_SHLIB:
 697                         break;
 698                 }
 699         }
 700
 701         return 0;
 702 }
 703
 704 static void
 705 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
 706 {
 707         u_int64_t class;
 708         u_int64_t data;
 709         u_int64_t osabi;
 710         u_int64_t type;
 711         u_int64_t machine;
 712         u_int64_t version;
 713         u_int64_t entry;
 714         u_int64_t phoff;
 715         u_int64_t shoff;
 716         u_int64_t flags;
 717         u_int64_t ehsize;
 718         u_int64_t phentsize;
 719         u_int64_t phnum;
 720         u_int64_t shentsize;
 721         u_int64_t shnum;
 722         u_int64_t shstrndx;
 723
 724         class = elf_get_byte(e, e, E_CLASS);
 725         data = elf_get_byte(e, e, E_DATA);
 726         osabi = elf_get_byte(e, e, E_OSABI);
 727         type = elf_get_quarter(e, e, E_TYPE);
 728         machine = elf_get_quarter(e, e, E_MACHINE);
 729         version = elf_get_word(e, e, E_VERSION);
 730         entry = elf_get_addr(e, e, E_ENTRY);
 731         phoff = elf_get_off(e, e, E_PHOFF);
 732         shoff = elf_get_off(e, e, E_SHOFF);
 733         flags = elf_get_word(e, e, E_FLAGS);
 734         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 735         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 736         phnum = elf_get_quarter(e, e, E_PHNUM);
 737         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 738         fprintf(out, "\nelf header:\n");
 739         fprintf(out, "\n");
 740         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 741             ei_abis[osabi]);
 742         fprintf(out, "\te_type: %s\n", e_types[type]);
 743         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 744         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 745         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 746         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 747         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 748         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 749         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 750         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 751         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 752         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 753         if (sh != NULL) {
 754                 shnum = elf_get_shnum(e, sh);
 755                 shstrndx = elf_get_shstrndx(e, sh);
 756                 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 757                 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 758         }
 759 }
 760
 761 static void
 762 elf_print_phdr(Elf32_Ehdr *e, void *p)
 763 {
 764         u_int64_t phentsize;
 765         u_int64_t phnum;
 766         u_int64_t type;
 767         u_int64_t offset;
 768         u_int64_t vaddr;
 769         u_int64_t paddr;
 770         u_int64_t filesz;
 771         u_int64_t memsz;
 772         u_int64_t flags;
 773         u_int64_t align;
 774         void *v;
 775         int i;
 776
 777         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 778         phnum = elf_get_quarter(e, e, E_PHNUM);
 779         fprintf(out, "\nprogram header:\n");
 780         for (i = 0; (u_int64_t)i < phnum; i++) {
 781                 v = (char *)p + i * phentsize;
 782                 type = elf_get_word(e, v, P_TYPE);
 783                 offset = elf_get_off(e, v, P_OFFSET);
 784                 vaddr = elf_get_addr(e, v, P_VADDR);
 785                 paddr = elf_get_addr(e, v, P_PADDR);
 786                 filesz = elf_get_size(e, v, P_FILESZ);
 787                 memsz = elf_get_size(e, v, P_MEMSZ);
 788                 flags = elf_get_word(e, v, P_FLAGS);
 789                 align = elf_get_size(e, v, P_ALIGN);
 790                 fprintf(out, "\n");
 791                 fprintf(out, "entry: %d\n", i);
 792                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 793                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 794                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 795                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 796                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 797                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 798                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 799                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 800         }
 801 }
 802
 803 static void
 804 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 805 {
 806         u_int64_t shentsize;
 807         u_int64_t shnum;
 808         u_int64_t name;
 809         u_int64_t type;
 810         u_int64_t flags;
 811         u_int64_t addr;
 812         u_int64_t offset;
 813         u_int64_t size;
 814         u_int64_t shlink;
 815         u_int64_t info;
 816         u_int64_t addralign;
 817         u_int64_t entsize;
 818         u_int64_t machine;
 819         void *v;
 820         int i;
 821
 822         if (sh == NULL) {
 823                 fprintf(out, "\nNo section headers\n");
 824                 return;
 825         }
 826
 827         machine = elf_get_quarter(e, e, E_MACHINE);
 828         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 829         shnum = elf_get_shnum(e, sh);
 830         fprintf(out, "\nsection header:\n");
 831         for (i = 0; (u_int64_t)i < shnum; i++) {
 832                 v = (char *)sh + i * shentsize;
 833                 name = elf_get_word(e, v, SH_NAME);
 834                 type = elf_get_word(e, v, SH_TYPE);
 835                 flags = elf_get_word(e, v, SH_FLAGS);
 836                 addr = elf_get_addr(e, v, SH_ADDR);
 837                 offset = elf_get_off(e, v, SH_OFFSET);
 838                 size = elf_get_size(e, v, SH_SIZE);
 839                 shlink = elf_get_word(e, v, SH_LINK);
 840                 info = elf_get_word(e, v, SH_INFO);
 841                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 842                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 843                 fprintf(out, "\n");
 844                 fprintf(out, "entry: %d\n", i);
 845                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 846                 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
 847                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 848                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 849                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 850                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 851                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 852                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 853                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 854                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 855         }
 856 }
 857
 858 static void
 859 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 860 {
 861         u_int64_t machine;
 862         u_int64_t offset;
 863         u_int64_t entsize;
 864         u_int64_t size;
 865         u_int64_t name;
 866         u_int64_t value;
 867         u_int64_t info;
 868         u_int64_t shndx;
 869         void *st;
 870         int len;
 871         int i;
 872
 873         machine = elf_get_quarter(e, e, E_MACHINE);
 874         offset = elf_get_off(e, sh, SH_OFFSET);
 875         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 876         size = elf_get_size(e, sh, SH_SIZE);
 877         name = elf_get_word(e, sh, SH_NAME);
 878         len = size / entsize;
 879         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 880         for (i = 0; i < len; i++) {
 881                 st = (char *)e + offset + i * entsize;
 882                 name = elf_get_word(e, st, ST_NAME);
 883                 value = elf_get_addr(e, st, ST_VALUE);
 884                 size = elf_get_size(e, st, ST_SIZE);
 885                 info = elf_get_byte(e, st, ST_INFO);
 886                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 887                 fprintf(out, "\n");
 888                 fprintf(out, "entry: %d\n", i);
 889                 fprintf(out, "\tst_name: %s\n", str + name);
 890                 fprintf(out, "\tst_value: %#jx\n", value);
 891                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 892                 fprintf(out, "\tst_info: %s %s\n",
 893                     st_type(machine, ELF32_ST_TYPE(info)),
 894                     st_bindings[ELF32_ST_BIND(info)]);
 895                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 896         }
 897 }
 898
 899 static void
 900 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 901 {
 902         u_int64_t offset;
 903         u_int64_t entsize;
 904         u_int64_t size;
 905         int64_t tag;
 906         u_int64_t ptr;
 907         u_int64_t val;
 908         void *d;
 909         int i;
 910
 911         offset = elf_get_off(e, sh, SH_OFFSET);
 912         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 913         size = elf_get_size(e, sh, SH_SIZE);
 914         fprintf(out, "\ndynamic:\n");
 915         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 916                 d = (char *)e + offset + i * entsize;
 917                 tag = elf_get_size(e, d, D_TAG);
 918                 ptr = elf_get_size(e, d, D_PTR);
 919                 val = elf_get_addr(e, d, D_VAL);
 920                 fprintf(out, "\n");
 921                 fprintf(out, "entry: %d\n", i);
 922                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 923                 switch (tag) {
 924                 case DT_NEEDED:
 925                 case DT_SONAME:
 926                 case DT_RPATH:
 927                         fprintf(out, "\td_val: %s\n", dynstr + val);
 928                         break;
 929                 case DT_PLTRELSZ:
 930                 case DT_RELA:
 931                 case DT_RELASZ:
 932                 case DT_RELAENT:
 933                 case DT_STRSZ:
 934                 case DT_SYMENT:
 935                 case DT_RELSZ:
 936                 case DT_RELENT:
 937                 case DT_PLTREL:
 938                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 939                         break;
 940                 case DT_PLTGOT:
 941                 case DT_HASH:
 942                 case DT_STRTAB:
 943                 case DT_SYMTAB:
 944                 case DT_INIT:
 945                 case DT_FINI:
 946                 case DT_REL:
 947                 case DT_JMPREL:
 948                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 949                         break;
 950                 case DT_NULL:
 951                 case DT_SYMBOLIC:
 952                 case DT_DEBUG:
 953                 case DT_TEXTREL:
 954                         break;
 955                 }
 956         }
 957 }
 958
 959 static void
 960 elf_print_rela(Elf32_Ehdr *e, void *sh)
 961 {
 962         u_int64_t offset;
 963         u_int64_t entsize;
 964         u_int64_t size;
 965         u_int64_t name;
 966         u_int64_t info;
 967         int64_t addend;
 968         void *ra;
 969         void *v;
 970         int i;
 971
 972         offset = elf_get_off(e, sh, SH_OFFSET);
 973         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 974         size = elf_get_size(e, sh, SH_SIZE);
 975         name = elf_get_word(e, sh, SH_NAME);
 976         v = (char *)e + offset;
 977         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 978         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 979                 ra = (char *)v + i * entsize;
 980                 offset = elf_get_addr(e, ra, RA_OFFSET);
 981                 info = elf_get_word(e, ra, RA_INFO);
 982                 addend = elf_get_off(e, ra, RA_ADDEND);
 983                 fprintf(out, "\n");
 984                 fprintf(out, "entry: %d\n", i);
 985                 fprintf(out, "\tr_offset: %#jx\n", offset);
 986                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 987                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 988         }
 989 }
 990
 991 static void
 992 elf_print_rel(Elf32_Ehdr *e, void *sh)
 993 {
 994         u_int64_t offset;
 995         u_int64_t entsize;
 996         u_int64_t size;
 997         u_int64_t name;
 998         u_int64_t info;
 999         void *r;
1000         void *v;
1001         int i;
1002
1003         offset = elf_get_off(e, sh, SH_OFFSET);
1004         entsize = elf_get_size(e, sh, SH_ENTSIZE);
1005         size = elf_get_size(e, sh, SH_SIZE);
1006         name = elf_get_word(e, sh, SH_NAME);
1007         v = (char *)e + offset;
1008         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
1009         for (i = 0; (u_int64_t)i < size / entsize; i++) {
1010                 r = (char *)v + i * entsize;
1011                 offset = elf_get_addr(e, r, R_OFFSET);
1012                 info = elf_get_word(e, r, R_INFO);
1013                 fprintf(out, "\n");
1014                 fprintf(out, "entry: %d\n", i);
1015                 fprintf(out, "\tr_offset: %#jx\n", offset);
1016                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
1017         }
1018 }
1019
1020 static void
1021 elf_print_interp(Elf32_Ehdr *e, void *p)
1022 {
1023         u_int64_t offset;
1024         char *s;
1025
1026         offset = elf_get_off(e, p, P_OFFSET);
1027         s = (char *)e + offset;
1028         fprintf(out, "\ninterp:\n");
1029         fprintf(out, "\t%s\n", s);
1030 }
1031
1032 static void
1033 elf_print_got(Elf32_Ehdr *e, void *sh)
1034 {
1035         u_int64_t offset;
1036         u_int64_t addralign;
1037         u_int64_t size;
1038         u_int64_t addr;
1039         void *v;
1040         int i;
1041
1042         offset = elf_get_off(e, sh, SH_OFFSET);
1043         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1044         size = elf_get_size(e, sh, SH_SIZE);
1045         v = (char *)e + offset;
1046         fprintf(out, "\nglobal offset table:\n");
1047         for (i = 0; (u_int64_t)i < size / addralign; i++) {
1048                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1049                 fprintf(out, "\n");
1050                 fprintf(out, "entry: %d\n", i);
1051                 fprintf(out, "\t%#jx\n", addr);
1052         }
1053 }
1054
1055 static void
1056 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1057 {
1058 }
1059
1060 static void
1061 elf_print_note(Elf32_Ehdr *e, void *sh)
1062 {
1063         u_int64_t offset;
1064         u_int64_t size;
1065         u_int64_t name;
1066         u_int32_t namesz;
1067         u_int32_t descsz;
1068         u_int32_t desc;
1069         char *n, *s;
1070
1071         offset = elf_get_off(e, sh, SH_OFFSET);
1072         size = elf_get_size(e, sh, SH_SIZE);
1073         name = elf_get_word(e, sh, SH_NAME);
1074         n = (char *)e + offset;
1075         fprintf(out, "\nnote (%s):\n", shstrtab + name);
1076         while (n < ((char *)e + offset + size)) {
1077                 namesz = elf_get_word(e, n, N_NAMESZ);
1078                 descsz = elf_get_word(e, n, N_DESCSZ);
1079                 type = elf_get_word(e, n, N_TYPE);
1080                 if (type < nitems(nt_types))
1081                         nt_type = nt_types[type];
1082                 else
1083                         nt_type = "Unknown type";
1084                 s = n + sizeof(Elf_Note);
1085                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1086                 fprintf(out, "\t%s %d (%s)\n", s, desc, nt_type);
1087                 n += sizeof(Elf_Note) + namesz + descsz;
1088         }
1089 }
1090
1091 static u_int64_t
1092 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1093 {
1094         u_int64_t val;
1095
1096         val = 0;
1097         switch (e->e_ident[EI_CLASS]) {
1098         case ELFCLASS32:
1099                 val = ((uint8_t *)base)[elf32_offsets[member]];
1100                 break;
1101         case ELFCLASS64:
1102                 val = ((uint8_t *)base)[elf64_offsets[member]];
1103                 break;
1104         case ELFCLASSNONE:
1105                 errx(1, "invalid class");
1106         }
1107
1108         return val;
1109 }
1110
1111 static u_int64_t
1112 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1113 {
1114         u_int64_t val;
1115
1116         val = 0;
1117         switch (e->e_ident[EI_CLASS]) {
1118         case ELFCLASS32:
1119                 base = (char *)base + elf32_offsets[member];
1120                 switch (e->e_ident[EI_DATA]) {
1121                 case ELFDATA2MSB:
1122                         val = be16dec(base);
1123                         break;
1124                 case ELFDATA2LSB:
1125                         val = le16dec(base);
1126                         break;
1127                 case ELFDATANONE:
1128                         errx(1, "invalid data format");
1129                 }
1130                 break;
1131         case ELFCLASS64:
1132                 base = (char *)base + elf64_offsets[member];
1133                 switch (e->e_ident[EI_DATA]) {
1134                 case ELFDATA2MSB:
1135                         val = be16dec(base);
1136                         break;
1137                 case ELFDATA2LSB:
1138                         val = le16dec(base);
1139                         break;
1140                 case ELFDATANONE:
1141                         errx(1, "invalid data format");
1142                 }
1143                 break;
1144         case ELFCLASSNONE:
1145                 errx(1, "invalid class");
1146         }
1147
1148         return val;
1149 }
1150
1151 #if 0
1152 static u_int64_t
1153 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1154 {
1155         u_int64_t val;
1156
1157         val = 0;
1158         switch (e->e_ident[EI_CLASS]) {
1159         case ELFCLASS32:
1160                 base = (char *)base + elf32_offsets[member];
1161                 switch (e->e_ident[EI_DATA]) {
1162                 case ELFDATA2MSB:
1163                         val = be16dec(base);
1164                         break;
1165                 case ELFDATA2LSB:
1166                         val = le16dec(base);
1167                         break;
1168                 case ELFDATANONE:
1169                         errx(1, "invalid data format");
1170                 }
1171                 break;
1172         case ELFCLASS64:
1173                 base = (char *)base + elf64_offsets[member];
1174                 switch (e->e_ident[EI_DATA]) {
1175                 case ELFDATA2MSB:
1176                         val = be32dec(base);
1177                         break;
1178                 case ELFDATA2LSB:
1179                         val = le32dec(base);
1180                         break;
1181                 case ELFDATANONE:
1182                         errx(1, "invalid data format");
1183                 }
1184                 break;
1185         case ELFCLASSNONE:
1186                 errx(1, "invalid class");
1187         }
1188
1189         return val;
1190 }
1191 #endif
1192
1193 static u_int64_t
1194 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1195 {
1196         u_int64_t val;
1197
1198         val = 0;
1199         switch (e->e_ident[EI_CLASS]) {
1200         case ELFCLASS32:
1201                 base = (char *)base + elf32_offsets[member];
1202                 switch (e->e_ident[EI_DATA]) {
1203                 case ELFDATA2MSB:
1204                         val = be32dec(base);
1205                         break;
1206                 case ELFDATA2LSB:
1207                         val = le32dec(base);
1208                         break;
1209                 case ELFDATANONE:
1210                         errx(1, "invalid data format");
1211                 }
1212                 break;
1213         case ELFCLASS64:
1214                 base = (char *)base + elf64_offsets[member];
1215                 switch (e->e_ident[EI_DATA]) {
1216                 case ELFDATA2MSB:
1217                         val = be32dec(base);
1218                         break;
1219                 case ELFDATA2LSB:
1220                         val = le32dec(base);
1221                         break;
1222                 case ELFDATANONE:
1223                         errx(1, "invalid data format");
1224                 }
1225                 break;
1226         case ELFCLASSNONE:
1227                 errx(1, "invalid class");
1228         }
1229
1230         return val;
1231 }
1232
1233 static u_int64_t
1234 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1235 {
1236         u_int64_t val;
1237
1238         val = 0;
1239         switch (e->e_ident[EI_CLASS]) {
1240         case ELFCLASS32:
1241                 base = (char *)base + elf32_offsets[member];
1242                 switch (e->e_ident[EI_DATA]) {
1243                 case ELFDATA2MSB:
1244                         val = be32dec(base);
1245                         break;
1246                 case ELFDATA2LSB:
1247                         val = le32dec(base);
1248                         break;
1249                 case ELFDATANONE:
1250                         errx(1, "invalid data format");
1251                 }
1252                 break;
1253         case ELFCLASS64:
1254                 base = (char *)base + elf64_offsets[member];
1255                 switch (e->e_ident[EI_DATA]) {
1256                 case ELFDATA2MSB:
1257                         val = be64dec(base);
1258                         break;
1259                 case ELFDATA2LSB:
1260                         val = le64dec(base);
1261                         break;
1262                 case ELFDATANONE:
1263                         errx(1, "invalid data format");
1264                 }
1265                 break;
1266         case ELFCLASSNONE:
1267                 errx(1, "invalid class");
1268         }
1269
1270         return val;
1271 }
1272
1273 static void
1274 usage(void)
1275 {
1276         fprintf(stderr,
1277             "usage: elfdump -a | -E | -cdeGhinprs [-w file] file\n");
1278         exit(1);
1279 }