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