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