usr.bin/elfdump/elfdump.c

   1 /*-
   2  * Copyright (c) 2003 David O'Brien.  All rights reserved.
   3  * Copyright (c) 2001 Jake Burkholder
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include <sys/cdefs.h>
  29 __FBSDID("$FreeBSD$");
  30
  31 #include <sys/types.h>
  32
  33 #include <sys/capsicum.h>
  34 #include <sys/elf32.h>
  35 #include <sys/elf64.h>
  36 #include <sys/endian.h>
  37 #include <sys/mman.h>
  38 #include <sys/stat.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <inttypes.h>
  43 #include <stddef.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <unistd.h>
  48
  49 #define ED_DYN          (1<<0)
  50 #define ED_EHDR         (1<<1)
  51 #define ED_GOT          (1<<2)
  52 #define ED_HASH         (1<<3)
  53 #define ED_INTERP       (1<<4)
  54 #define ED_NOTE         (1<<5)
  55 #define ED_PHDR         (1<<6)
  56 #define ED_REL          (1<<7)
  57 #define ED_SHDR         (1<<8)
  58 #define ED_SYMTAB       (1<<9)
  59 #define ED_ALL          ((1<<10)-1)
  60
  61 #define elf_get_addr    elf_get_quad
  62 #define elf_get_off     elf_get_quad
  63 #define elf_get_size    elf_get_quad
  64
  65 enum elf_member {
  66         D_TAG = 1, D_PTR, D_VAL,
  67
  68         E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
  69         E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
  70         E_SHNUM, E_SHSTRNDX,
  71
  72         N_NAMESZ, N_DESCSZ, N_TYPE,
  73
  74         P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
  75         P_ALIGN,
  76
  77         SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
  78         SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
  79
  80         ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
  81
  82         R_OFFSET, R_INFO,
  83
  84         RA_OFFSET, RA_INFO, RA_ADDEND
  85 };
  86
  87 typedef enum elf_member elf_member_t;
  88
  89 static int elf32_offsets[] = {
  90         0,
  91
  92         offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
  93         offsetof(Elf32_Dyn, d_un.d_val),
  94
  95         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
  96         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
  97         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
  98         offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
  99         offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
 100         offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
 101         offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
 102         offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
 103         offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
 104         offsetof(Elf32_Ehdr, e_shstrndx),
 105
 106         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 107         offsetof(Elf_Note, n_type),
 108
 109         offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
 110         offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
 111         offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
 112         offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
 113
 114         offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
 115         offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
 116         offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
 117         offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
 118         offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
 119
 120         offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
 121         offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
 122         offsetof(Elf32_Sym, st_shndx),
 123
 124         offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
 125
 126         offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
 127         offsetof(Elf32_Rela, r_addend)
 128 };
 129
 130 static int elf64_offsets[] = {
 131         0,
 132
 133         offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
 134         offsetof(Elf64_Dyn, d_un.d_val),
 135
 136         offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
 137         offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
 138         offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
 139         offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
 140         offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
 141         offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
 142         offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
 143         offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
 144         offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
 145         offsetof(Elf64_Ehdr, e_shstrndx),
 146
 147         offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
 148         offsetof(Elf_Note, n_type),
 149
 150         offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
 151         offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
 152         offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
 153         offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
 154
 155         offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
 156         offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
 157         offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
 158         offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
 159         offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
 160
 161         offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
 162         offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
 163         offsetof(Elf64_Sym, st_shndx),
 164
 165         offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
 166
 167         offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
 168         offsetof(Elf64_Rela, r_addend)
 169 };
 170
 171 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
 172 static const char *
 173 d_tags(u_int64_t tag)
 174 {
 175         static char unknown_tag[48];
 176
 177         switch (tag) {
 178         case DT_NULL:           return "DT_NULL";
 179         case DT_NEEDED:         return "DT_NEEDED";
 180         case DT_PLTRELSZ:       return "DT_PLTRELSZ";
 181         case DT_PLTGOT:         return "DT_PLTGOT";
 182         case DT_HASH:           return "DT_HASH";
 183         case DT_STRTAB:         return "DT_STRTAB";
 184         case DT_SYMTAB:         return "DT_SYMTAB";
 185         case DT_RELA:           return "DT_RELA";
 186         case DT_RELASZ:         return "DT_RELASZ";
 187         case DT_RELAENT:        return "DT_RELAENT";
 188         case DT_STRSZ:          return "DT_STRSZ";
 189         case DT_SYMENT:         return "DT_SYMENT";
 190         case DT_INIT:           return "DT_INIT";
 191         case DT_FINI:           return "DT_FINI";
 192         case DT_SONAME:         return "DT_SONAME";
 193         case DT_RPATH:          return "DT_RPATH";
 194         case DT_SYMBOLIC:       return "DT_SYMBOLIC";
 195         case DT_REL:            return "DT_REL";
 196         case DT_RELSZ:          return "DT_RELSZ";
 197         case DT_RELENT:         return "DT_RELENT";
 198         case DT_PLTREL:         return "DT_PLTREL";
 199         case DT_DEBUG:          return "DT_DEBUG";
 200         case DT_TEXTREL:        return "DT_TEXTREL";
 201         case DT_JMPREL:         return "DT_JMPREL";
 202         case DT_BIND_NOW:       return "DT_BIND_NOW";
 203         case DT_INIT_ARRAY:     return "DT_INIT_ARRAY";
 204         case DT_FINI_ARRAY:     return "DT_FINI_ARRAY";
 205         case DT_INIT_ARRAYSZ:   return "DT_INIT_ARRAYSZ";
 206         case DT_FINI_ARRAYSZ:   return "DT_FINI_ARRAYSZ";
 207         case DT_RUNPATH:        return "DT_RUNPATH";
 208         case DT_FLAGS:          return "DT_FLAGS";
 209         case DT_PREINIT_ARRAY:  return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */
 210         case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ";
 211         /* 0x6000000D - 0x6ffff000 operating system-specific semantics */
 212         case 0x6ffffdf5:        return "DT_GNU_PRELINKED";
 213         case 0x6ffffdf6:        return "DT_GNU_CONFLICTSZ";
 214         case 0x6ffffdf7:        return "DT_GNU_LIBLISTSZ";
 215         case 0x6ffffdf8:        return "DT_SUNW_CHECKSUM";
 216         case DT_PLTPADSZ:       return "DT_PLTPADSZ";
 217         case DT_MOVEENT:        return "DT_MOVEENT";
 218         case DT_MOVESZ:         return "DT_MOVESZ";
 219         case DT_FEATURE:        return "DT_FEATURE";
 220         case DT_POSFLAG_1:      return "DT_POSFLAG_1";
 221         case DT_SYMINSZ:        return "DT_SYMINSZ";
 222         case DT_SYMINENT :      return "DT_SYMINENT (DT_VALRNGHI)";
 223         case DT_ADDRRNGLO:      return "DT_ADDRRNGLO";
 224         case DT_GNU_HASH:       return "DT_GNU_HASH";
 225         case 0x6ffffef8:        return "DT_GNU_CONFLICT";
 226         case 0x6ffffef9:        return "DT_GNU_LIBLIST";
 227         case DT_CONFIG:         return "DT_CONFIG";
 228         case DT_DEPAUDIT:       return "DT_DEPAUDIT";
 229         case DT_AUDIT:          return "DT_AUDIT";
 230         case DT_PLTPAD:         return "DT_PLTPAD";
 231         case DT_MOVETAB:        return "DT_MOVETAB";
 232         case DT_SYMINFO :       return "DT_SYMINFO (DT_ADDRRNGHI)";
 233         case DT_RELACOUNT:      return "DT_RELACOUNT";
 234         case DT_RELCOUNT:       return "DT_RELCOUNT";
 235         case DT_FLAGS_1:        return "DT_FLAGS_1";
 236         case DT_VERDEF:         return "DT_VERDEF";
 237         case DT_VERDEFNUM:      return "DT_VERDEFNUM";
 238         case DT_VERNEED:        return "DT_VERNEED";
 239         case DT_VERNEEDNUM:     return "DT_VERNEEDNUM";
 240         case 0x6ffffff0:        return "DT_GNU_VERSYM";
 241         /* 0x70000000 - 0x7fffffff processor-specific semantics */
 242         case 0x70000000:        return "DT_IA_64_PLT_RESERVE";
 243         case 0x7ffffffd:        return "DT_SUNW_AUXILIARY";
 244         case 0x7ffffffe:        return "DT_SUNW_USED";
 245         case 0x7fffffff:        return "DT_SUNW_FILTER";
 246         }
 247         snprintf(unknown_tag, sizeof(unknown_tag),
 248                 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag);
 249         return (unknown_tag);
 250 }
 251
 252 static const char *
 253 e_machines(u_int mach)
 254 {
 255         static char machdesc[64];
 256
 257         switch (mach) {
 258         case EM_NONE:   return "EM_NONE";
 259         case EM_M32:    return "EM_M32";
 260         case EM_SPARC:  return "EM_SPARC";
 261         case EM_386:    return "EM_386";
 262         case EM_68K:    return "EM_68K";
 263         case EM_88K:    return "EM_88K";
 264         case EM_IAMCU:  return "EM_IAMCU";
 265         case EM_860:    return "EM_860";
 266         case EM_MIPS:   return "EM_MIPS";
 267         case EM_PPC:    return "EM_PPC";
 268         case EM_PPC64:  return "EM_PPC64";
 269         case EM_ARM:    return "EM_ARM";
 270         case EM_ALPHA:  return "EM_ALPHA (legacy)";
 271         case EM_SPARCV9:return "EM_SPARCV9";
 272         case EM_IA_64:  return "EM_IA_64";
 273         case EM_X86_64: return "EM_X86_64";
 274         case EM_AARCH64:return "EM_AARCH64";
 275         case EM_RISCV:  return "EM_RISCV";
 276         }
 277         snprintf(machdesc, sizeof(machdesc),
 278             "(unknown machine) -- type 0x%x", mach);
 279         return (machdesc);
 280 }
 281
 282 static const char *e_types[] = {
 283         "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
 284 };
 285
 286 static const char *ei_versions[] = {
 287         "EV_NONE", "EV_CURRENT"
 288 };
 289
 290 static const char *ei_classes[] = {
 291         "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
 292 };
 293
 294 static const char *ei_data[] = {
 295         "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
 296 };
 297
 298 static const char *ei_abis[256] = {
 299         "ELFOSABI_NONE", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
 300         "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
 301         "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
 302         "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
 303         [255] = "ELFOSABI_STANDALONE"
 304 };
 305
 306 static const char *p_types[] = {
 307         "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
 308         "PT_SHLIB", "PT_PHDR", "PT_TLS"
 309 };
 310
 311 static const char *p_flags[] = {
 312         "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
 313         "PF_X|PF_W|PF_R"
 314 };
 315
 316 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
 317 static const char *
 318 sh_types(uint64_t machine, uint64_t sht) {
 319         static char unknown_buf[64];
 320
 321         if (sht < 0x60000000) {
 322                 switch (sht) {
 323                 case SHT_NULL:          return "SHT_NULL";
 324                 case SHT_PROGBITS:      return "SHT_PROGBITS";
 325                 case SHT_SYMTAB:        return "SHT_SYMTAB";
 326                 case SHT_STRTAB:        return "SHT_STRTAB";
 327                 case SHT_RELA:          return "SHT_RELA";
 328                 case SHT_HASH:          return "SHT_HASH";
 329                 case SHT_DYNAMIC:       return "SHT_DYNAMIC";
 330                 case SHT_NOTE:          return "SHT_NOTE";
 331                 case SHT_NOBITS:        return "SHT_NOBITS";
 332                 case SHT_REL:           return "SHT_REL";
 333                 case SHT_SHLIB:         return "SHT_SHLIB";
 334                 case SHT_DYNSYM:        return "SHT_DYNSYM";
 335                 case SHT_INIT_ARRAY:    return "SHT_INIT_ARRAY";
 336                 case SHT_FINI_ARRAY:    return "SHT_FINI_ARRAY";
 337                 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
 338                 case SHT_GROUP:         return "SHT_GROUP";
 339                 case SHT_SYMTAB_SHNDX:  return "SHT_SYMTAB_SHNDX";
 340                 }
 341                 snprintf(unknown_buf, sizeof(unknown_buf),
 342                     "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
 343                 return (unknown_buf);
 344         } else if (sht < 0x70000000) {
 345                 /* 0x60000000-0x6fffffff operating system-specific semantics */
 346                 switch (sht) {
 347                 case 0x6ffffff0:        return "XXX:VERSYM";
 348                 case SHT_SUNW_dof:      return "SHT_SUNW_dof";
 349                 case SHT_GNU_HASH:      return "SHT_GNU_HASH";
 350                 case 0x6ffffff7:        return "SHT_GNU_LIBLIST";
 351                 case 0x6ffffffc:        return "XXX:VERDEF";
 352                 case SHT_SUNW_verdef:   return "SHT_SUNW(GNU)_verdef";
 353                 case SHT_SUNW_verneed:  return "SHT_SUNW(GNU)_verneed";
 354                 case SHT_SUNW_versym:   return "SHT_SUNW(GNU)_versym";
 355                 }
 356                 snprintf(unknown_buf, sizeof(unknown_buf),
 357                     "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
 358                      (uintmax_t)sht);
 359                 return (unknown_buf);
 360         } else if (sht < 0x80000000) {
 361                 /* 0x70000000-0x7fffffff processor-specific semantics */
 362                 switch (machine) {
 363                 case EM_ARM:
 364                         switch (sht) {
 365                         case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
 366                         case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
 367                         case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
 368                         case SHT_ARM_DEBUGOVERLAY:
 369                             return "SHT_ARM_DEBUGOVERLAY";
 370                         case SHT_ARM_OVERLAYSECTION:
 371                             return "SHT_ARM_OVERLAYSECTION";
 372                         }
 373                         break;
 374                 case EM_IA_64:
 375                         switch (sht) {
 376                         case 0x70000000: return "SHT_IA_64_EXT";
 377                         case 0x70000001: return "SHT_IA_64_UNWIND";
 378                         }
 379                         break;
 380                 case EM_MIPS:
 381                         switch (sht) {
 382                         case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO";
 383                         case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
 384                         case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS";
 385                         }
 386                         break;
 387                 }
 388                 switch (sht) {
 389                 case 0x7ffffffd: return "XXX:AUXILIARY";
 390                 case 0x7fffffff: return "XXX:FILTER";
 391                 }
 392                 snprintf(unknown_buf, sizeof(unknown_buf),
 393                     "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
 394                      (uintmax_t)sht);
 395                 return (unknown_buf);
 396         } else {
 397                 /* 0x80000000-0xffffffff application programs */
 398                 snprintf(unknown_buf, sizeof(unknown_buf),
 399                     "ERROR: SHT 0x%jx NOT DEFINED",
 400                      (uintmax_t)sht);
 401                 return (unknown_buf);
 402         }
 403 }
 404
 405 static const char *sh_flags[] = {
 406         "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
 407         "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
 408         "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
 409 };
 410
 411 static const char *
 412 st_type(unsigned int mach, unsigned int type)
 413 {
 414         static char s_type[32];
 415
 416         switch (type) {
 417         case STT_NOTYPE: return "STT_NOTYPE";
 418         case STT_OBJECT: return "STT_OBJECT";
 419         case STT_FUNC: return "STT_FUNC";
 420         case STT_SECTION: return "STT_SECTION";
 421         case STT_FILE: return "STT_FILE";
 422         case STT_COMMON: return "STT_COMMON";
 423         case STT_TLS: return "STT_TLS";
 424         case 13:
 425                 if (mach == EM_SPARCV9)
 426                         return "STT_SPARC_REGISTER";
 427                 break;
 428         }
 429         snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type);
 430         return (s_type);
 431 }
 432
 433 static const char *st_bindings[] = {
 434         "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
 435 };
 436
 437 static char *dynstr;
 438 static char *shstrtab;
 439 static char *strtab;
 440 static FILE *out;
 441
 442 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
 443 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
 444     elf_member_t member);
 445 #if 0
 446 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
 447 #endif
 448 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
 449 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
 450
 451 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
 452 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
 453 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
 454 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
 455 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
 456 static void elf_print_rel(Elf32_Ehdr *e, void *r);
 457 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
 458 static void elf_print_interp(Elf32_Ehdr *e, void *p);
 459 static void elf_print_got(Elf32_Ehdr *e, void *sh);
 460 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
 461 static void elf_print_note(Elf32_Ehdr *e, void *sh);
 462
 463 static void usage(void);
 464
 465 /*
 466  * Helpers for ELF files with shnum or shstrndx values that don't fit in the
 467  * ELF header.  If the values are too large then an escape value is used to
 468  * indicate that the actual value is found in one of section 0's fields.
 469  */
 470 static uint64_t
 471 elf_get_shnum(Elf32_Ehdr *e, void *sh)
 472 {
 473         uint64_t shnum;
 474
 475         shnum = elf_get_quarter(e, e, E_SHNUM);
 476         if (shnum == 0)
 477                 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
 478         return shnum;
 479 }
 480
 481 static uint64_t
 482 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
 483 {
 484         uint64_t shstrndx;
 485
 486         shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
 487         if (shstrndx == SHN_XINDEX)
 488                 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
 489         return shstrndx;
 490 }
 491
 492 int
 493 main(int ac, char **av)
 494 {
 495         cap_rights_t rights;
 496         u_int64_t phoff;
 497         u_int64_t shoff;
 498         u_int64_t phentsize;
 499         u_int64_t phnum;
 500         u_int64_t shentsize;
 501         u_int64_t shnum;
 502         u_int64_t shstrndx;
 503         u_int64_t offset;
 504         u_int64_t name;
 505         u_int64_t type;
 506         struct stat sb;
 507         u_int flags;
 508         Elf32_Ehdr *e;
 509         void *p;
 510         void *sh;
 511         void *v;
 512         int fd;
 513         int ch;
 514         int i;
 515
 516         out = stdout;
 517         flags = 0;
 518         while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
 519                 switch (ch) {
 520                 case 'a':
 521                         flags = ED_ALL;
 522                         break;
 523                 case 'c':
 524                         flags |= ED_SHDR;
 525                         break;
 526                 case 'd':
 527                         flags |= ED_DYN;
 528                         break;
 529                 case 'e':
 530                         flags |= ED_EHDR;
 531                         break;
 532                 case 'i':
 533                         flags |= ED_INTERP;
 534                         break;
 535                 case 'G':
 536                         flags |= ED_GOT;
 537                         break;
 538                 case 'h':
 539                         flags |= ED_HASH;
 540                         break;
 541                 case 'n':
 542                         flags |= ED_NOTE;
 543                         break;
 544                 case 'p':
 545                         flags |= ED_PHDR;
 546                         break;
 547                 case 'r':
 548                         flags |= ED_REL;
 549                         break;
 550                 case 's':
 551                         flags |= ED_SYMTAB;
 552                         break;
 553                 case 'w':
 554                         if ((out = fopen(optarg, "w")) == NULL)
 555                                 err(1, "%s", optarg);
 556                         cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
 557                         if (cap_rights_limit(fileno(out), &rights) < 0 && errno != ENOSYS)
 558                                 err(1, "unable to limit rights for %s", optarg);
 559                         break;
 560                 case '?':
 561                 default:
 562                         usage();
 563                 }
 564         ac -= optind;
 565         av += optind;
 566         if (ac == 0 || flags == 0)
 567                 usage();
 568         if ((fd = open(*av, O_RDONLY)) < 0 ||
 569             fstat(fd, &sb) < 0)
 570                 err(1, "%s", *av);
 571         cap_rights_init(&rights, CAP_MMAP_R);
 572         if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
 573                 err(1, "unable to limit rights for %s", *av);
 574         close(STDIN_FILENO);
 575         cap_rights_init(&rights, CAP_WRITE);
 576         if (cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS)
 577                 err(1, "unable to limit rights for stdout");
 578         if (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS)
 579                 err(1, "unable to limit rights for stderr");
 580         if (cap_enter() < 0 && errno != ENOSYS)
 581                 err(1, "unable to enter capability mode");
 582         e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
 583         if (e == MAP_FAILED)
 584                 err(1, NULL);
 585         if (!IS_ELF(*(Elf32_Ehdr *)e))
 586                 errx(1, "not an elf file");
 587         phoff = elf_get_off(e, e, E_PHOFF);
 588         shoff = elf_get_off(e, e, E_SHOFF);
 589         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 590         phnum = elf_get_quarter(e, e, E_PHNUM);
 591         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 592         p = (char *)e + phoff;
 593         if (shoff > 0) {
 594                 sh = (char *)e + shoff;
 595                 shnum = elf_get_shnum(e, sh);
 596                 shstrndx = elf_get_shstrndx(e, sh);
 597                 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
 598                     SH_OFFSET);
 599                 shstrtab = (char *)e + offset;
 600         } else {
 601                 sh = NULL;
 602                 shnum = 0;
 603                 shstrndx = 0;
 604                 shstrtab = NULL;
 605         }
 606         for (i = 0; (u_int64_t)i < shnum; i++) {
 607                 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
 608                 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
 609                 if (strcmp(shstrtab + name, ".strtab") == 0)
 610                         strtab = (char *)e + offset;
 611                 if (strcmp(shstrtab + name, ".dynstr") == 0)
 612                         dynstr = (char *)e + offset;
 613         }
 614         if (flags & ED_EHDR)
 615                 elf_print_ehdr(e, sh);
 616         if (flags & ED_PHDR)
 617                 elf_print_phdr(e, p);
 618         if (flags & ED_SHDR)
 619                 elf_print_shdr(e, sh);
 620         for (i = 0; (u_int64_t)i < phnum; i++) {
 621                 v = (char *)p + i * phentsize;
 622                 type = elf_get_word(e, v, P_TYPE);
 623                 switch (type) {
 624                 case PT_INTERP:
 625                         if (flags & ED_INTERP)
 626                                 elf_print_interp(e, v);
 627                         break;
 628                 case PT_NULL:
 629                 case PT_LOAD:
 630                 case PT_DYNAMIC:
 631                 case PT_NOTE:
 632                 case PT_SHLIB:
 633                 case PT_PHDR:
 634                         break;
 635                 }
 636         }
 637         for (i = 0; (u_int64_t)i < shnum; i++) {
 638                 v = (char *)sh + i * shentsize;
 639                 type = elf_get_word(e, v, SH_TYPE);
 640                 switch (type) {
 641                 case SHT_SYMTAB:
 642                         if (flags & ED_SYMTAB)
 643                                 elf_print_symtab(e, v, strtab);
 644                         break;
 645                 case SHT_DYNAMIC:
 646                         if (flags & ED_DYN)
 647                                 elf_print_dynamic(e, v);
 648                         break;
 649                 case SHT_RELA:
 650                         if (flags & ED_REL)
 651                                 elf_print_rela(e, v);
 652                         break;
 653                 case SHT_REL:
 654                         if (flags & ED_REL)
 655                                 elf_print_rel(e, v);
 656                         break;
 657                 case SHT_NOTE:
 658                         name = elf_get_word(e, v, SH_NAME);
 659                         if (flags & ED_NOTE &&
 660                             strcmp(shstrtab + name, ".note.ABI-tag") == 0)
 661                                 elf_print_note(e, v);
 662                         break;
 663                 case SHT_DYNSYM:
 664                         if (flags & ED_SYMTAB)
 665                                 elf_print_symtab(e, v, dynstr);
 666                         break;
 667                 case SHT_PROGBITS:
 668                         name = elf_get_word(e, v, SH_NAME);
 669                         if (flags & ED_GOT &&
 670                             strcmp(shstrtab + name, ".got") == 0)
 671                                 elf_print_got(e, v);
 672                         break;
 673                 case SHT_HASH:
 674                         if (flags & ED_HASH)
 675                                 elf_print_hash(e, v);
 676                         break;
 677                 case SHT_NULL:
 678                 case SHT_STRTAB:
 679                 case SHT_NOBITS:
 680                 case SHT_SHLIB:
 681                         break;
 682                 }
 683         }
 684
 685         return 0;
 686 }
 687
 688 static void
 689 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
 690 {
 691         u_int64_t class;
 692         u_int64_t data;
 693         u_int64_t osabi;
 694         u_int64_t type;
 695         u_int64_t machine;
 696         u_int64_t version;
 697         u_int64_t entry;
 698         u_int64_t phoff;
 699         u_int64_t shoff;
 700         u_int64_t flags;
 701         u_int64_t ehsize;
 702         u_int64_t phentsize;
 703         u_int64_t phnum;
 704         u_int64_t shentsize;
 705         u_int64_t shnum;
 706         u_int64_t shstrndx;
 707
 708         class = elf_get_byte(e, e, E_CLASS);
 709         data = elf_get_byte(e, e, E_DATA);
 710         osabi = elf_get_byte(e, e, E_OSABI);
 711         type = elf_get_quarter(e, e, E_TYPE);
 712         machine = elf_get_quarter(e, e, E_MACHINE);
 713         version = elf_get_word(e, e, E_VERSION);
 714         entry = elf_get_addr(e, e, E_ENTRY);
 715         phoff = elf_get_off(e, e, E_PHOFF);
 716         shoff = elf_get_off(e, e, E_SHOFF);
 717         flags = elf_get_word(e, e, E_FLAGS);
 718         ehsize = elf_get_quarter(e, e, E_EHSIZE);
 719         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 720         phnum = elf_get_quarter(e, e, E_PHNUM);
 721         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 722         fprintf(out, "\nelf header:\n");
 723         fprintf(out, "\n");
 724         fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
 725             ei_abis[osabi]);
 726         fprintf(out, "\te_type: %s\n", e_types[type]);
 727         fprintf(out, "\te_machine: %s\n", e_machines(machine));
 728         fprintf(out, "\te_version: %s\n", ei_versions[version]);
 729         fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
 730         fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
 731         fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
 732         fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
 733         fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
 734         fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
 735         fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
 736         fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
 737         if (sh != NULL) {
 738                 shnum = elf_get_shnum(e, sh);
 739                 shstrndx = elf_get_shstrndx(e, sh);
 740                 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
 741                 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
 742         }
 743 }
 744
 745 static void
 746 elf_print_phdr(Elf32_Ehdr *e, void *p)
 747 {
 748         u_int64_t phentsize;
 749         u_int64_t phnum;
 750         u_int64_t type;
 751         u_int64_t offset;
 752         u_int64_t vaddr;
 753         u_int64_t paddr;
 754         u_int64_t filesz;
 755         u_int64_t memsz;
 756         u_int64_t flags;
 757         u_int64_t align;
 758         void *v;
 759         int i;
 760
 761         phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
 762         phnum = elf_get_quarter(e, e, E_PHNUM);
 763         fprintf(out, "\nprogram header:\n");
 764         for (i = 0; (u_int64_t)i < phnum; i++) {
 765                 v = (char *)p + i * phentsize;
 766                 type = elf_get_word(e, v, P_TYPE);
 767                 offset = elf_get_off(e, v, P_OFFSET);
 768                 vaddr = elf_get_addr(e, v, P_VADDR);
 769                 paddr = elf_get_addr(e, v, P_PADDR);
 770                 filesz = elf_get_size(e, v, P_FILESZ);
 771                 memsz = elf_get_size(e, v, P_MEMSZ);
 772                 flags = elf_get_word(e, v, P_FLAGS);
 773                 align = elf_get_size(e, v, P_ALIGN);
 774                 fprintf(out, "\n");
 775                 fprintf(out, "entry: %d\n", i);
 776                 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
 777                 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
 778                 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
 779                 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
 780                 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
 781                 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
 782                 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
 783                 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
 784         }
 785 }
 786
 787 static void
 788 elf_print_shdr(Elf32_Ehdr *e, void *sh)
 789 {
 790         u_int64_t shentsize;
 791         u_int64_t shnum;
 792         u_int64_t name;
 793         u_int64_t type;
 794         u_int64_t flags;
 795         u_int64_t addr;
 796         u_int64_t offset;
 797         u_int64_t size;
 798         u_int64_t shlink;
 799         u_int64_t info;
 800         u_int64_t addralign;
 801         u_int64_t entsize;
 802         u_int64_t machine;
 803         void *v;
 804         int i;
 805
 806         if (sh == NULL) {
 807                 fprintf(out, "\nNo section headers\n");
 808                 return;
 809         }
 810
 811         machine = elf_get_quarter(e, e, E_MACHINE);
 812         shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
 813         shnum = elf_get_shnum(e, sh);
 814         fprintf(out, "\nsection header:\n");
 815         for (i = 0; (u_int64_t)i < shnum; i++) {
 816                 v = (char *)sh + i * shentsize;
 817                 name = elf_get_word(e, v, SH_NAME);
 818                 type = elf_get_word(e, v, SH_TYPE);
 819                 flags = elf_get_word(e, v, SH_FLAGS);
 820                 addr = elf_get_addr(e, v, SH_ADDR);
 821                 offset = elf_get_off(e, v, SH_OFFSET);
 822                 size = elf_get_size(e, v, SH_SIZE);
 823                 shlink = elf_get_word(e, v, SH_LINK);
 824                 info = elf_get_word(e, v, SH_INFO);
 825                 addralign = elf_get_size(e, v, SH_ADDRALIGN);
 826                 entsize = elf_get_size(e, v, SH_ENTSIZE);
 827                 fprintf(out, "\n");
 828                 fprintf(out, "entry: %d\n", i);
 829                 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
 830                 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
 831                 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
 832                 fprintf(out, "\tsh_addr: %#jx\n", addr);
 833                 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
 834                 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
 835                 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
 836                 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
 837                 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
 838                 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
 839         }
 840 }
 841
 842 static void
 843 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
 844 {
 845         u_int64_t machine;
 846         u_int64_t offset;
 847         u_int64_t entsize;
 848         u_int64_t size;
 849         u_int64_t name;
 850         u_int64_t value;
 851         u_int64_t info;
 852         u_int64_t shndx;
 853         void *st;
 854         int len;
 855         int i;
 856
 857         machine = elf_get_quarter(e, e, E_MACHINE);
 858         offset = elf_get_off(e, sh, SH_OFFSET);
 859         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 860         size = elf_get_size(e, sh, SH_SIZE);
 861         name = elf_get_word(e, sh, SH_NAME);
 862         len = size / entsize;
 863         fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
 864         for (i = 0; i < len; i++) {
 865                 st = (char *)e + offset + i * entsize;
 866                 name = elf_get_word(e, st, ST_NAME);
 867                 value = elf_get_addr(e, st, ST_VALUE);
 868                 size = elf_get_size(e, st, ST_SIZE);
 869                 info = elf_get_byte(e, st, ST_INFO);
 870                 shndx = elf_get_quarter(e, st, ST_SHNDX);
 871                 fprintf(out, "\n");
 872                 fprintf(out, "entry: %d\n", i);
 873                 fprintf(out, "\tst_name: %s\n", str + name);
 874                 fprintf(out, "\tst_value: %#jx\n", value);
 875                 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
 876                 fprintf(out, "\tst_info: %s %s\n",
 877                     st_type(machine, ELF32_ST_TYPE(info)),
 878                     st_bindings[ELF32_ST_BIND(info)]);
 879                 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
 880         }
 881 }
 882
 883 static void
 884 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
 885 {
 886         u_int64_t offset;
 887         u_int64_t entsize;
 888         u_int64_t size;
 889         int64_t tag;
 890         u_int64_t ptr;
 891         u_int64_t val;
 892         void *d;
 893         int i;
 894
 895         offset = elf_get_off(e, sh, SH_OFFSET);
 896         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 897         size = elf_get_size(e, sh, SH_SIZE);
 898         fprintf(out, "\ndynamic:\n");
 899         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 900                 d = (char *)e + offset + i * entsize;
 901                 tag = elf_get_size(e, d, D_TAG);
 902                 ptr = elf_get_size(e, d, D_PTR);
 903                 val = elf_get_addr(e, d, D_VAL);
 904                 fprintf(out, "\n");
 905                 fprintf(out, "entry: %d\n", i);
 906                 fprintf(out, "\td_tag: %s\n", d_tags(tag));
 907                 switch (tag) {
 908                 case DT_NEEDED:
 909                 case DT_SONAME:
 910                 case DT_RPATH:
 911                         fprintf(out, "\td_val: %s\n", dynstr + val);
 912                         break;
 913                 case DT_PLTRELSZ:
 914                 case DT_RELA:
 915                 case DT_RELASZ:
 916                 case DT_RELAENT:
 917                 case DT_STRSZ:
 918                 case DT_SYMENT:
 919                 case DT_RELSZ:
 920                 case DT_RELENT:
 921                 case DT_PLTREL:
 922                         fprintf(out, "\td_val: %jd\n", (intmax_t)val);
 923                         break;
 924                 case DT_PLTGOT:
 925                 case DT_HASH:
 926                 case DT_STRTAB:
 927                 case DT_SYMTAB:
 928                 case DT_INIT:
 929                 case DT_FINI:
 930                 case DT_REL:
 931                 case DT_JMPREL:
 932                         fprintf(out, "\td_ptr: %#jx\n", ptr);
 933                         break;
 934                 case DT_NULL:
 935                 case DT_SYMBOLIC:
 936                 case DT_DEBUG:
 937                 case DT_TEXTREL:
 938                         break;
 939                 }
 940         }
 941 }
 942
 943 static void
 944 elf_print_rela(Elf32_Ehdr *e, void *sh)
 945 {
 946         u_int64_t offset;
 947         u_int64_t entsize;
 948         u_int64_t size;
 949         u_int64_t name;
 950         u_int64_t info;
 951         int64_t addend;
 952         void *ra;
 953         void *v;
 954         int i;
 955
 956         offset = elf_get_off(e, sh, SH_OFFSET);
 957         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 958         size = elf_get_size(e, sh, SH_SIZE);
 959         name = elf_get_word(e, sh, SH_NAME);
 960         v = (char *)e + offset;
 961         fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
 962         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 963                 ra = (char *)v + i * entsize;
 964                 offset = elf_get_addr(e, ra, RA_OFFSET);
 965                 info = elf_get_word(e, ra, RA_INFO);
 966                 addend = elf_get_off(e, ra, RA_ADDEND);
 967                 fprintf(out, "\n");
 968                 fprintf(out, "entry: %d\n", i);
 969                 fprintf(out, "\tr_offset: %#jx\n", offset);
 970                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
 971                 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
 972         }
 973 }
 974
 975 static void
 976 elf_print_rel(Elf32_Ehdr *e, void *sh)
 977 {
 978         u_int64_t offset;
 979         u_int64_t entsize;
 980         u_int64_t size;
 981         u_int64_t name;
 982         u_int64_t info;
 983         void *r;
 984         void *v;
 985         int i;
 986
 987         offset = elf_get_off(e, sh, SH_OFFSET);
 988         entsize = elf_get_size(e, sh, SH_ENTSIZE);
 989         size = elf_get_size(e, sh, SH_SIZE);
 990         name = elf_get_word(e, sh, SH_NAME);
 991         v = (char *)e + offset;
 992         fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
 993         for (i = 0; (u_int64_t)i < size / entsize; i++) {
 994                 r = (char *)v + i * entsize;
 995                 offset = elf_get_addr(e, r, R_OFFSET);
 996                 info = elf_get_word(e, r, R_INFO);
 997                 fprintf(out, "\n");
 998                 fprintf(out, "entry: %d\n", i);
 999                 fprintf(out, "\tr_offset: %#jx\n", offset);
1000                 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
1001         }
1002 }
1003
1004 static void
1005 elf_print_interp(Elf32_Ehdr *e, void *p)
1006 {
1007         u_int64_t offset;
1008         char *s;
1009
1010         offset = elf_get_off(e, p, P_OFFSET);
1011         s = (char *)e + offset;
1012         fprintf(out, "\ninterp:\n");
1013         fprintf(out, "\t%s\n", s);
1014 }
1015
1016 static void
1017 elf_print_got(Elf32_Ehdr *e, void *sh)
1018 {
1019         u_int64_t offset;
1020         u_int64_t addralign;
1021         u_int64_t size;
1022         u_int64_t addr;
1023         void *v;
1024         int i;
1025
1026         offset = elf_get_off(e, sh, SH_OFFSET);
1027         addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1028         size = elf_get_size(e, sh, SH_SIZE);
1029         v = (char *)e + offset;
1030         fprintf(out, "\nglobal offset table:\n");
1031         for (i = 0; (u_int64_t)i < size / addralign; i++) {
1032                 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1033                 fprintf(out, "\n");
1034                 fprintf(out, "entry: %d\n", i);
1035                 fprintf(out, "\t%#jx\n", addr);
1036         }
1037 }
1038
1039 static void
1040 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1041 {
1042 }
1043
1044 static void
1045 elf_print_note(Elf32_Ehdr *e, void *sh)
1046 {
1047         u_int64_t offset;
1048         u_int64_t size;
1049         u_int64_t name;
1050         u_int32_t namesz;
1051         u_int32_t descsz;
1052         u_int32_t desc;
1053         char *n, *s;
1054
1055         offset = elf_get_off(e, sh, SH_OFFSET);
1056         size = elf_get_size(e, sh, SH_SIZE);
1057         name = elf_get_word(e, sh, SH_NAME);
1058         n = (char *)e + offset;
1059         fprintf(out, "\nnote (%s):\n", shstrtab + name);
1060         while (n < ((char *)e + offset + size)) {
1061                 namesz = elf_get_word(e, n, N_NAMESZ);
1062                 descsz = elf_get_word(e, n, N_DESCSZ);
1063                 s = n + sizeof(Elf_Note);
1064                 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1065                 fprintf(out, "\t%s %d\n", s, desc);
1066                 n += sizeof(Elf_Note) + namesz + descsz;
1067         }
1068 }
1069
1070 static u_int64_t
1071 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1072 {
1073         u_int64_t val;
1074
1075         val = 0;
1076         switch (e->e_ident[EI_CLASS]) {
1077         case ELFCLASS32:
1078                 val = ((uint8_t *)base)[elf32_offsets[member]];
1079                 break;
1080         case ELFCLASS64:
1081                 val = ((uint8_t *)base)[elf64_offsets[member]];
1082                 break;
1083         case ELFCLASSNONE:
1084                 errx(1, "invalid class");
1085         }
1086
1087         return val;
1088 }
1089
1090 static u_int64_t
1091 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1092 {
1093         u_int64_t val;
1094
1095         val = 0;
1096         switch (e->e_ident[EI_CLASS]) {
1097         case ELFCLASS32:
1098                 base = (char *)base + elf32_offsets[member];
1099                 switch (e->e_ident[EI_DATA]) {
1100                 case ELFDATA2MSB:
1101                         val = be16dec(base);
1102                         break;
1103                 case ELFDATA2LSB:
1104                         val = le16dec(base);
1105                         break;
1106                 case ELFDATANONE:
1107                         errx(1, "invalid data format");
1108                 }
1109                 break;
1110         case ELFCLASS64:
1111                 base = (char *)base + elf64_offsets[member];
1112                 switch (e->e_ident[EI_DATA]) {
1113                 case ELFDATA2MSB:
1114                         val = be16dec(base);
1115                         break;
1116                 case ELFDATA2LSB:
1117                         val = le16dec(base);
1118                         break;
1119                 case ELFDATANONE:
1120                         errx(1, "invalid data format");
1121                 }
1122                 break;
1123         case ELFCLASSNONE:
1124                 errx(1, "invalid class");
1125         }
1126
1127         return val;
1128 }
1129
1130 #if 0
1131 static u_int64_t
1132 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1133 {
1134         u_int64_t val;
1135
1136         val = 0;
1137         switch (e->e_ident[EI_CLASS]) {
1138         case ELFCLASS32:
1139                 base = (char *)base + elf32_offsets[member];
1140                 switch (e->e_ident[EI_DATA]) {
1141                 case ELFDATA2MSB:
1142                         val = be16dec(base);
1143                         break;
1144                 case ELFDATA2LSB:
1145                         val = le16dec(base);
1146                         break;
1147                 case ELFDATANONE:
1148                         errx(1, "invalid data format");
1149                 }
1150                 break;
1151         case ELFCLASS64:
1152                 base = (char *)base + elf64_offsets[member];
1153                 switch (e->e_ident[EI_DATA]) {
1154                 case ELFDATA2MSB:
1155                         val = be32dec(base);
1156                         break;
1157                 case ELFDATA2LSB:
1158                         val = le32dec(base);
1159                         break;
1160                 case ELFDATANONE:
1161                         errx(1, "invalid data format");
1162                 }
1163                 break;
1164         case ELFCLASSNONE:
1165                 errx(1, "invalid class");
1166         }
1167
1168         return val;
1169 }
1170 #endif
1171
1172 static u_int64_t
1173 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1174 {
1175         u_int64_t val;
1176
1177         val = 0;
1178         switch (e->e_ident[EI_CLASS]) {
1179         case ELFCLASS32:
1180                 base = (char *)base + elf32_offsets[member];
1181                 switch (e->e_ident[EI_DATA]) {
1182                 case ELFDATA2MSB:
1183                         val = be32dec(base);
1184                         break;
1185                 case ELFDATA2LSB:
1186                         val = le32dec(base);
1187                         break;
1188                 case ELFDATANONE:
1189                         errx(1, "invalid data format");
1190                 }
1191                 break;
1192         case ELFCLASS64:
1193                 base = (char *)base + elf64_offsets[member];
1194                 switch (e->e_ident[EI_DATA]) {
1195                 case ELFDATA2MSB:
1196                         val = be32dec(base);
1197                         break;
1198                 case ELFDATA2LSB:
1199                         val = le32dec(base);
1200                         break;
1201                 case ELFDATANONE:
1202                         errx(1, "invalid data format");
1203                 }
1204                 break;
1205         case ELFCLASSNONE:
1206                 errx(1, "invalid class");
1207         }
1208
1209         return val;
1210 }
1211
1212 static u_int64_t
1213 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1214 {
1215         u_int64_t val;
1216
1217         val = 0;
1218         switch (e->e_ident[EI_CLASS]) {
1219         case ELFCLASS32:
1220                 base = (char *)base + elf32_offsets[member];
1221                 switch (e->e_ident[EI_DATA]) {
1222                 case ELFDATA2MSB:
1223                         val = be32dec(base);
1224                         break;
1225                 case ELFDATA2LSB:
1226                         val = le32dec(base);
1227                         break;
1228                 case ELFDATANONE:
1229                         errx(1, "invalid data format");
1230                 }
1231                 break;
1232         case ELFCLASS64:
1233                 base = (char *)base + elf64_offsets[member];
1234                 switch (e->e_ident[EI_DATA]) {
1235                 case ELFDATA2MSB:
1236                         val = be64dec(base);
1237                         break;
1238                 case ELFDATA2LSB:
1239                         val = le64dec(base);
1240                         break;
1241                 case ELFDATANONE:
1242                         errx(1, "invalid data format");
1243                 }
1244                 break;
1245         case ELFCLASSNONE:
1246                 errx(1, "invalid class");
1247         }
1248
1249         return val;
1250 }
1251
1252 static void
1253 usage(void)
1254 {
1255         fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");
1256         exit(1);
1257 }