| 1 | /* elfedit.c -- Update the ELF header of an ELF format file |
| 2 | Copyright (C) 2010-2019 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Binutils. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 19 | 02110-1301, USA. */ |
| 20 | \f |
| 21 | #include "config.h" |
| 22 | #include "sysdep.h" |
| 23 | #include <assert.h> |
| 24 | |
| 25 | #if __GNUC__ >= 2 |
| 26 | /* Define BFD64 here, even if our default architecture is 32 bit ELF |
| 27 | as this will allow us to read in and parse 64bit and 32bit ELF files. |
| 28 | Only do this if we believe that the compiler can support a 64 bit |
| 29 | data type. For now we only rely on GCC being able to do this. */ |
| 30 | #define BFD64 |
| 31 | #endif |
| 32 | |
| 33 | #include "bfd.h" |
| 34 | #include "elfcomm.h" |
| 35 | #include "bucomm.h" |
| 36 | |
| 37 | #include "elf/common.h" |
| 38 | #include "elf/external.h" |
| 39 | #include "elf/internal.h" |
| 40 | |
| 41 | #include "getopt.h" |
| 42 | #include "libiberty.h" |
| 43 | #include "safe-ctype.h" |
| 44 | #include "filenames.h" |
| 45 | |
| 46 | char * program_name = "elfedit"; |
| 47 | static long archive_file_offset; |
| 48 | static unsigned long archive_file_size; |
| 49 | static Elf_Internal_Ehdr elf_header; |
| 50 | static Elf32_External_Ehdr ehdr32; |
| 51 | static Elf64_External_Ehdr ehdr64; |
| 52 | static int input_elf_machine = -1; |
| 53 | static int output_elf_machine = -1; |
| 54 | static int input_elf_type = -1; |
| 55 | static int output_elf_type = -1; |
| 56 | static int input_elf_osabi = -1; |
| 57 | static int output_elf_osabi = -1; |
| 58 | enum elfclass |
| 59 | { |
| 60 | ELF_CLASS_UNKNOWN = -1, |
| 61 | ELF_CLASS_NONE = ELFCLASSNONE, |
| 62 | ELF_CLASS_32 = ELFCLASS32, |
| 63 | ELF_CLASS_64 = ELFCLASS64, |
| 64 | ELF_CLASS_BOTH |
| 65 | }; |
| 66 | static enum elfclass input_elf_class = ELF_CLASS_UNKNOWN; |
| 67 | static enum elfclass output_elf_class = ELF_CLASS_BOTH; |
| 68 | |
| 69 | #ifdef HAVE_MMAP |
| 70 | #include <sys/mman.h> |
| 71 | |
| 72 | static unsigned int enable_x86_features; |
| 73 | static unsigned int disable_x86_features; |
| 74 | |
| 75 | static int |
| 76 | update_gnu_property (const char *file_name, FILE *file) |
| 77 | { |
| 78 | char *map; |
| 79 | Elf_Internal_Phdr *phdrs; |
| 80 | struct stat st_buf; |
| 81 | unsigned int i; |
| 82 | int ret; |
| 83 | |
| 84 | if (!enable_x86_features && !disable_x86_features) |
| 85 | return 0; |
| 86 | |
| 87 | if (elf_header.e_machine != EM_386 |
| 88 | && elf_header.e_machine != EM_X86_64) |
| 89 | { |
| 90 | error (_("%s: Not an i386 nor x86-64 ELF file\n"), file_name); |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | if (fstat (fileno (file), &st_buf) < 0) |
| 95 | { |
| 96 | error (_("%s: stat () failed\n"), file_name); |
| 97 | return 1; |
| 98 | } |
| 99 | |
| 100 | map = mmap (NULL, st_buf.st_size, PROT_READ | PROT_WRITE, |
| 101 | MAP_SHARED, fileno (file), 0); |
| 102 | if (map == MAP_FAILED) |
| 103 | { |
| 104 | error (_("%s: mmap () failed\n"), file_name); |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | phdrs = xmalloc (elf_header.e_phnum * sizeof (*phdrs)); |
| 109 | |
| 110 | if (elf_header.e_ident[EI_CLASS] == ELFCLASS32) |
| 111 | { |
| 112 | Elf32_External_Phdr *phdrs32 |
| 113 | = (Elf32_External_Phdr *) (map + elf_header.e_phoff); |
| 114 | for (i = 0; i < elf_header.e_phnum; i++) |
| 115 | { |
| 116 | phdrs[i].p_type = BYTE_GET (phdrs32[i].p_type); |
| 117 | phdrs[i].p_offset = BYTE_GET (phdrs32[i].p_offset); |
| 118 | phdrs[i].p_vaddr = BYTE_GET (phdrs32[i].p_vaddr); |
| 119 | phdrs[i].p_paddr = BYTE_GET (phdrs32[i].p_paddr); |
| 120 | phdrs[i].p_filesz = BYTE_GET (phdrs32[i].p_filesz); |
| 121 | phdrs[i].p_memsz = BYTE_GET (phdrs32[i].p_memsz); |
| 122 | phdrs[i].p_flags = BYTE_GET (phdrs32[i].p_flags); |
| 123 | phdrs[i].p_align = BYTE_GET (phdrs32[i].p_align); |
| 124 | } |
| 125 | } |
| 126 | else |
| 127 | { |
| 128 | Elf64_External_Phdr *phdrs64 |
| 129 | = (Elf64_External_Phdr *) (map + elf_header.e_phoff); |
| 130 | for (i = 0; i < elf_header.e_phnum; i++) |
| 131 | { |
| 132 | phdrs[i].p_type = BYTE_GET (phdrs64[i].p_type); |
| 133 | phdrs[i].p_offset = BYTE_GET (phdrs64[i].p_offset); |
| 134 | phdrs[i].p_vaddr = BYTE_GET (phdrs64[i].p_vaddr); |
| 135 | phdrs[i].p_paddr = BYTE_GET (phdrs64[i].p_paddr); |
| 136 | phdrs[i].p_filesz = BYTE_GET (phdrs64[i].p_filesz); |
| 137 | phdrs[i].p_memsz = BYTE_GET (phdrs64[i].p_memsz); |
| 138 | phdrs[i].p_flags = BYTE_GET (phdrs64[i].p_flags); |
| 139 | phdrs[i].p_align = BYTE_GET (phdrs64[i].p_align); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | ret = 0; |
| 144 | for (i = 0; i < elf_header.e_phnum; i++) |
| 145 | if (phdrs[i].p_type == PT_NOTE) |
| 146 | { |
| 147 | size_t offset = phdrs[i].p_offset; |
| 148 | size_t size = phdrs[i].p_filesz; |
| 149 | size_t align = phdrs[i].p_align; |
| 150 | char *buf = map + offset; |
| 151 | char *p = buf; |
| 152 | |
| 153 | while (p < buf + size) |
| 154 | { |
| 155 | Elf_External_Note *xnp = (Elf_External_Note *) p; |
| 156 | Elf_Internal_Note in; |
| 157 | |
| 158 | if (offsetof (Elf_External_Note, name) > buf - p + size) |
| 159 | { |
| 160 | ret = 1; |
| 161 | goto out; |
| 162 | } |
| 163 | |
| 164 | in.type = BYTE_GET (xnp->type); |
| 165 | in.namesz = BYTE_GET (xnp->namesz); |
| 166 | in.namedata = xnp->name; |
| 167 | if (in.namesz > buf - in.namedata + size) |
| 168 | { |
| 169 | ret = 1; |
| 170 | goto out; |
| 171 | } |
| 172 | |
| 173 | in.descsz = BYTE_GET (xnp->descsz); |
| 174 | in.descdata = p + ELF_NOTE_DESC_OFFSET (in.namesz, align); |
| 175 | in.descpos = offset + (in.descdata - buf); |
| 176 | if (in.descsz != 0 |
| 177 | && (in.descdata >= buf + size |
| 178 | || in.descsz > buf - in.descdata + size)) |
| 179 | { |
| 180 | ret = 1; |
| 181 | goto out; |
| 182 | } |
| 183 | |
| 184 | if (in.namesz == sizeof "GNU" |
| 185 | && strcmp (in.namedata, "GNU") == 0 |
| 186 | && in.type == NT_GNU_PROPERTY_TYPE_0) |
| 187 | { |
| 188 | unsigned char *ptr; |
| 189 | unsigned char *ptr_end; |
| 190 | |
| 191 | if (in.descsz < 8 || (in.descsz % align) != 0) |
| 192 | { |
| 193 | ret = 1; |
| 194 | goto out; |
| 195 | } |
| 196 | |
| 197 | ptr = (unsigned char *) in.descdata; |
| 198 | ptr_end = ptr + in.descsz; |
| 199 | |
| 200 | do |
| 201 | { |
| 202 | unsigned int type = byte_get (ptr, 4); |
| 203 | unsigned int datasz = byte_get (ptr + 4, 4); |
| 204 | unsigned int bitmask, old_bitmask; |
| 205 | |
| 206 | ptr += 8; |
| 207 | if ((ptr + datasz) > ptr_end) |
| 208 | { |
| 209 | ret = 1; |
| 210 | goto out; |
| 211 | } |
| 212 | |
| 213 | if (type == GNU_PROPERTY_X86_FEATURE_1_AND) |
| 214 | { |
| 215 | if (datasz != 4) |
| 216 | { |
| 217 | ret = 1; |
| 218 | goto out; |
| 219 | } |
| 220 | |
| 221 | old_bitmask = byte_get (ptr, 4); |
| 222 | bitmask = old_bitmask; |
| 223 | if (enable_x86_features) |
| 224 | bitmask |= enable_x86_features; |
| 225 | if (disable_x86_features) |
| 226 | bitmask &= ~disable_x86_features; |
| 227 | if (old_bitmask != bitmask) |
| 228 | byte_put (ptr, bitmask, 4); |
| 229 | goto out; |
| 230 | } |
| 231 | |
| 232 | ptr += ELF_ALIGN_UP (datasz, align); |
| 233 | } |
| 234 | while ((ptr_end - ptr) >= 8); |
| 235 | } |
| 236 | |
| 237 | p += ELF_NOTE_NEXT_OFFSET (in.namesz, in.descsz, align); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | out: |
| 242 | if (ret != 0) |
| 243 | error (_("%s: Invalid PT_NOTE segment\n"), file_name); |
| 244 | |
| 245 | free (phdrs); |
| 246 | munmap (map, st_buf.st_size); |
| 247 | |
| 248 | return ret; |
| 249 | } |
| 250 | |
| 251 | /* Set enable_x86_features and disable_x86_features for a feature |
| 252 | string, FEATURE. */ |
| 253 | |
| 254 | static int |
| 255 | elf_x86_feature (const char *feature, int enable) |
| 256 | { |
| 257 | unsigned int x86_feature; |
| 258 | if (strcasecmp (feature, "ibt") == 0) |
| 259 | x86_feature = GNU_PROPERTY_X86_FEATURE_1_IBT; |
| 260 | else if (strcasecmp (feature, "shstk") == 0) |
| 261 | x86_feature = GNU_PROPERTY_X86_FEATURE_1_SHSTK; |
| 262 | else |
| 263 | { |
| 264 | error (_("Unknown x86 feature: %s\n"), feature); |
| 265 | return -1; |
| 266 | } |
| 267 | |
| 268 | if (enable) |
| 269 | { |
| 270 | enable_x86_features |= x86_feature; |
| 271 | disable_x86_features &= ~x86_feature; |
| 272 | } |
| 273 | else |
| 274 | { |
| 275 | disable_x86_features |= x86_feature; |
| 276 | enable_x86_features &= ~x86_feature; |
| 277 | } |
| 278 | |
| 279 | return 0; |
| 280 | } |
| 281 | #endif |
| 282 | |
| 283 | /* Return ELF class for a machine type, MACH. */ |
| 284 | |
| 285 | static enum elfclass |
| 286 | elf_class (int mach) |
| 287 | { |
| 288 | switch (mach) |
| 289 | { |
| 290 | case EM_386: |
| 291 | case EM_IAMCU: |
| 292 | return ELF_CLASS_32; |
| 293 | case EM_L1OM: |
| 294 | case EM_K1OM: |
| 295 | return ELF_CLASS_64; |
| 296 | case EM_X86_64: |
| 297 | case EM_NONE: |
| 298 | return ELF_CLASS_BOTH; |
| 299 | default: |
| 300 | return ELF_CLASS_BOTH; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | static int |
| 305 | update_elf_header (const char *file_name, FILE *file) |
| 306 | { |
| 307 | int class, machine, type, status, osabi; |
| 308 | |
| 309 | if (elf_header.e_ident[EI_VERSION] != EV_CURRENT) |
| 310 | { |
| 311 | error |
| 312 | (_("%s: Unsupported EI_VERSION: %d is not %d\n"), |
| 313 | file_name, elf_header.e_ident[EI_VERSION], |
| 314 | EV_CURRENT); |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | /* Return if e_machine is the same as output_elf_machine. */ |
| 319 | if (output_elf_machine == elf_header.e_machine) |
| 320 | return 1; |
| 321 | |
| 322 | class = elf_header.e_ident[EI_CLASS]; |
| 323 | machine = elf_header.e_machine; |
| 324 | |
| 325 | /* Skip if class doesn't match. */ |
| 326 | if (input_elf_class == ELF_CLASS_UNKNOWN) |
| 327 | input_elf_class = elf_class (machine); |
| 328 | |
| 329 | if (input_elf_class != ELF_CLASS_BOTH |
| 330 | && (int) input_elf_class != class) |
| 331 | { |
| 332 | error |
| 333 | (_("%s: Unmatched input EI_CLASS: %d is not %d\n"), |
| 334 | file_name, class, input_elf_class); |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | if (output_elf_class != ELF_CLASS_BOTH |
| 339 | && (int) output_elf_class != class) |
| 340 | { |
| 341 | error |
| 342 | (_("%s: Unmatched output EI_CLASS: %d is not %d\n"), |
| 343 | file_name, class, output_elf_class); |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | /* Skip if e_machine doesn't match. */ |
| 348 | if (input_elf_machine != -1 && machine != input_elf_machine) |
| 349 | { |
| 350 | error |
| 351 | (_("%s: Unmatched e_machine: %d is not %d\n"), |
| 352 | file_name, machine, input_elf_machine); |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | type = elf_header.e_type; |
| 357 | |
| 358 | /* Skip if e_type doesn't match. */ |
| 359 | if (input_elf_type != -1 && type != input_elf_type) |
| 360 | { |
| 361 | error |
| 362 | (_("%s: Unmatched e_type: %d is not %d\n"), |
| 363 | file_name, type, input_elf_type); |
| 364 | return 0; |
| 365 | } |
| 366 | |
| 367 | osabi = elf_header.e_ident[EI_OSABI]; |
| 368 | |
| 369 | /* Skip if OSABI doesn't match. */ |
| 370 | if (input_elf_osabi != -1 && osabi != input_elf_osabi) |
| 371 | { |
| 372 | error |
| 373 | (_("%s: Unmatched EI_OSABI: %d is not %d\n"), |
| 374 | file_name, osabi, input_elf_osabi); |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | /* Update e_machine, e_type and EI_OSABI. */ |
| 379 | switch (class) |
| 380 | { |
| 381 | default: |
| 382 | /* We should never get here. */ |
| 383 | abort (); |
| 384 | break; |
| 385 | case ELFCLASS32: |
| 386 | if (output_elf_machine != -1) |
| 387 | BYTE_PUT (ehdr32.e_machine, output_elf_machine); |
| 388 | if (output_elf_type != -1) |
| 389 | BYTE_PUT (ehdr32.e_type, output_elf_type); |
| 390 | if (output_elf_osabi != -1) |
| 391 | ehdr32.e_ident[EI_OSABI] = output_elf_osabi; |
| 392 | status = fwrite (&ehdr32, sizeof (ehdr32), 1, file) == 1; |
| 393 | break; |
| 394 | case ELFCLASS64: |
| 395 | if (output_elf_machine != -1) |
| 396 | BYTE_PUT (ehdr64.e_machine, output_elf_machine); |
| 397 | if (output_elf_type != -1) |
| 398 | BYTE_PUT (ehdr64.e_type, output_elf_type); |
| 399 | if (output_elf_osabi != -1) |
| 400 | ehdr64.e_ident[EI_OSABI] = output_elf_osabi; |
| 401 | status = fwrite (&ehdr64, sizeof (ehdr64), 1, file) == 1; |
| 402 | break; |
| 403 | } |
| 404 | |
| 405 | if (status != 1) |
| 406 | error (_("%s: Failed to update ELF header: %s\n"), |
| 407 | file_name, strerror (errno)); |
| 408 | |
| 409 | return status; |
| 410 | } |
| 411 | |
| 412 | static int |
| 413 | get_file_header (FILE * file) |
| 414 | { |
| 415 | /* Read in the identity array. */ |
| 416 | if (fread (elf_header.e_ident, EI_NIDENT, 1, file) != 1) |
| 417 | return 0; |
| 418 | |
| 419 | if (elf_header.e_ident[EI_MAG0] != ELFMAG0 |
| 420 | || elf_header.e_ident[EI_MAG1] != ELFMAG1 |
| 421 | || elf_header.e_ident[EI_MAG2] != ELFMAG2 |
| 422 | || elf_header.e_ident[EI_MAG3] != ELFMAG3) |
| 423 | return 0; |
| 424 | |
| 425 | /* Determine how to read the rest of the header. */ |
| 426 | switch (elf_header.e_ident[EI_DATA]) |
| 427 | { |
| 428 | default: /* fall through */ |
| 429 | case ELFDATANONE: /* fall through */ |
| 430 | case ELFDATA2LSB: |
| 431 | byte_get = byte_get_little_endian; |
| 432 | byte_put = byte_put_little_endian; |
| 433 | break; |
| 434 | case ELFDATA2MSB: |
| 435 | byte_get = byte_get_big_endian; |
| 436 | byte_put = byte_put_big_endian; |
| 437 | break; |
| 438 | } |
| 439 | |
| 440 | /* Read in the rest of the header. For now we only support 32 bit |
| 441 | and 64 bit ELF files. */ |
| 442 | switch (elf_header.e_ident[EI_CLASS]) |
| 443 | { |
| 444 | default: |
| 445 | return 0; |
| 446 | |
| 447 | case ELFCLASS32: |
| 448 | if (fread (ehdr32.e_type, sizeof (ehdr32) - EI_NIDENT, |
| 449 | 1, file) != 1) |
| 450 | return 0; |
| 451 | |
| 452 | elf_header.e_type = BYTE_GET (ehdr32.e_type); |
| 453 | elf_header.e_machine = BYTE_GET (ehdr32.e_machine); |
| 454 | elf_header.e_version = BYTE_GET (ehdr32.e_version); |
| 455 | elf_header.e_entry = BYTE_GET (ehdr32.e_entry); |
| 456 | elf_header.e_phoff = BYTE_GET (ehdr32.e_phoff); |
| 457 | elf_header.e_shoff = BYTE_GET (ehdr32.e_shoff); |
| 458 | elf_header.e_flags = BYTE_GET (ehdr32.e_flags); |
| 459 | elf_header.e_ehsize = BYTE_GET (ehdr32.e_ehsize); |
| 460 | elf_header.e_phentsize = BYTE_GET (ehdr32.e_phentsize); |
| 461 | elf_header.e_phnum = BYTE_GET (ehdr32.e_phnum); |
| 462 | elf_header.e_shentsize = BYTE_GET (ehdr32.e_shentsize); |
| 463 | elf_header.e_shnum = BYTE_GET (ehdr32.e_shnum); |
| 464 | elf_header.e_shstrndx = BYTE_GET (ehdr32.e_shstrndx); |
| 465 | |
| 466 | memcpy (&ehdr32, &elf_header, EI_NIDENT); |
| 467 | break; |
| 468 | |
| 469 | case ELFCLASS64: |
| 470 | /* If we have been compiled with sizeof (bfd_vma) == 4, then |
| 471 | we will not be able to cope with the 64bit data found in |
| 472 | 64 ELF files. Detect this now and abort before we start |
| 473 | overwriting things. */ |
| 474 | if (sizeof (bfd_vma) < 8) |
| 475 | { |
| 476 | error (_("This executable has been built without support for a\n\ |
| 477 | 64 bit data type and so it cannot process 64 bit ELF files.\n")); |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | if (fread (ehdr64.e_type, sizeof (ehdr64) - EI_NIDENT, |
| 482 | 1, file) != 1) |
| 483 | return 0; |
| 484 | |
| 485 | elf_header.e_type = BYTE_GET (ehdr64.e_type); |
| 486 | elf_header.e_machine = BYTE_GET (ehdr64.e_machine); |
| 487 | elf_header.e_version = BYTE_GET (ehdr64.e_version); |
| 488 | elf_header.e_entry = BYTE_GET (ehdr64.e_entry); |
| 489 | elf_header.e_phoff = BYTE_GET (ehdr64.e_phoff); |
| 490 | elf_header.e_shoff = BYTE_GET (ehdr64.e_shoff); |
| 491 | elf_header.e_flags = BYTE_GET (ehdr64.e_flags); |
| 492 | elf_header.e_ehsize = BYTE_GET (ehdr64.e_ehsize); |
| 493 | elf_header.e_phentsize = BYTE_GET (ehdr64.e_phentsize); |
| 494 | elf_header.e_phnum = BYTE_GET (ehdr64.e_phnum); |
| 495 | elf_header.e_shentsize = BYTE_GET (ehdr64.e_shentsize); |
| 496 | elf_header.e_shnum = BYTE_GET (ehdr64.e_shnum); |
| 497 | elf_header.e_shstrndx = BYTE_GET (ehdr64.e_shstrndx); |
| 498 | |
| 499 | memcpy (&ehdr64, &elf_header, EI_NIDENT); |
| 500 | break; |
| 501 | } |
| 502 | return 1; |
| 503 | } |
| 504 | |
| 505 | /* Process one ELF object file according to the command line options. |
| 506 | This file may actually be stored in an archive. The file is |
| 507 | positioned at the start of the ELF object. */ |
| 508 | |
| 509 | static int |
| 510 | process_object (const char *file_name, FILE *file) |
| 511 | { |
| 512 | /* Rememeber where we are. */ |
| 513 | long offset = ftell (file); |
| 514 | |
| 515 | if (! get_file_header (file)) |
| 516 | { |
| 517 | error (_("%s: Failed to read ELF header\n"), file_name); |
| 518 | return 1; |
| 519 | } |
| 520 | |
| 521 | /* Go to the position of the ELF header. */ |
| 522 | if (fseek (file, offset, SEEK_SET) != 0) |
| 523 | { |
| 524 | error (_("%s: Failed to seek to ELF header\n"), file_name); |
| 525 | } |
| 526 | |
| 527 | if (! update_elf_header (file_name, file)) |
| 528 | return 1; |
| 529 | |
| 530 | return 0; |
| 531 | } |
| 532 | |
| 533 | /* Process an ELF archive. |
| 534 | On entry the file is positioned just after the ARMAG string. */ |
| 535 | |
| 536 | static int |
| 537 | process_archive (const char * file_name, FILE * file, |
| 538 | bfd_boolean is_thin_archive) |
| 539 | { |
| 540 | struct archive_info arch; |
| 541 | struct archive_info nested_arch; |
| 542 | size_t got; |
| 543 | int ret; |
| 544 | |
| 545 | /* The ARCH structure is used to hold information about this archive. */ |
| 546 | arch.file_name = NULL; |
| 547 | arch.file = NULL; |
| 548 | arch.index_array = NULL; |
| 549 | arch.sym_table = NULL; |
| 550 | arch.longnames = NULL; |
| 551 | |
| 552 | /* The NESTED_ARCH structure is used as a single-item cache of information |
| 553 | about a nested archive (when members of a thin archive reside within |
| 554 | another regular archive file). */ |
| 555 | nested_arch.file_name = NULL; |
| 556 | nested_arch.file = NULL; |
| 557 | nested_arch.index_array = NULL; |
| 558 | nested_arch.sym_table = NULL; |
| 559 | nested_arch.longnames = NULL; |
| 560 | |
| 561 | if (setup_archive (&arch, file_name, file, is_thin_archive, FALSE) != 0) |
| 562 | { |
| 563 | ret = 1; |
| 564 | goto out; |
| 565 | } |
| 566 | |
| 567 | ret = 0; |
| 568 | |
| 569 | while (1) |
| 570 | { |
| 571 | char * name; |
| 572 | size_t namelen; |
| 573 | char * qualified_name; |
| 574 | |
| 575 | /* Read the next archive header. */ |
| 576 | if (fseek (file, arch.next_arhdr_offset, SEEK_SET) != 0) |
| 577 | { |
| 578 | error (_("%s: failed to seek to next archive header\n"), |
| 579 | file_name); |
| 580 | return 1; |
| 581 | } |
| 582 | got = fread (&arch.arhdr, 1, sizeof arch.arhdr, file); |
| 583 | if (got != sizeof arch.arhdr) |
| 584 | { |
| 585 | if (got == 0) |
| 586 | break; |
| 587 | error (_("%s: failed to read archive header\n"), |
| 588 | file_name); |
| 589 | ret = 1; |
| 590 | break; |
| 591 | } |
| 592 | if (memcmp (arch.arhdr.ar_fmag, ARFMAG, 2) != 0) |
| 593 | { |
| 594 | error (_("%s: did not find a valid archive header\n"), |
| 595 | arch.file_name); |
| 596 | ret = 1; |
| 597 | break; |
| 598 | } |
| 599 | |
| 600 | arch.next_arhdr_offset += sizeof arch.arhdr; |
| 601 | |
| 602 | archive_file_size = strtoul (arch.arhdr.ar_size, NULL, 10); |
| 603 | if (archive_file_size & 01) |
| 604 | ++archive_file_size; |
| 605 | |
| 606 | name = get_archive_member_name (&arch, &nested_arch); |
| 607 | if (name == NULL) |
| 608 | { |
| 609 | error (_("%s: bad archive file name\n"), file_name); |
| 610 | ret = 1; |
| 611 | break; |
| 612 | } |
| 613 | namelen = strlen (name); |
| 614 | |
| 615 | qualified_name = make_qualified_name (&arch, &nested_arch, name); |
| 616 | if (qualified_name == NULL) |
| 617 | { |
| 618 | error (_("%s: bad archive file name\n"), file_name); |
| 619 | ret = 1; |
| 620 | break; |
| 621 | } |
| 622 | |
| 623 | if (is_thin_archive && arch.nested_member_origin == 0) |
| 624 | { |
| 625 | /* This is a proxy for an external member of a thin archive. */ |
| 626 | FILE *member_file; |
| 627 | char *member_file_name = adjust_relative_path (file_name, |
| 628 | name, namelen); |
| 629 | if (member_file_name == NULL) |
| 630 | { |
| 631 | ret = 1; |
| 632 | break; |
| 633 | } |
| 634 | |
| 635 | member_file = fopen (member_file_name, "r+b"); |
| 636 | if (member_file == NULL) |
| 637 | { |
| 638 | error (_("Input file '%s' is not readable\n"), |
| 639 | member_file_name); |
| 640 | free (member_file_name); |
| 641 | ret = 1; |
| 642 | break; |
| 643 | } |
| 644 | |
| 645 | archive_file_offset = arch.nested_member_origin; |
| 646 | |
| 647 | ret |= process_object (qualified_name, member_file); |
| 648 | |
| 649 | fclose (member_file); |
| 650 | free (member_file_name); |
| 651 | } |
| 652 | else if (is_thin_archive) |
| 653 | { |
| 654 | /* This is a proxy for a member of a nested archive. */ |
| 655 | archive_file_offset = arch.nested_member_origin + sizeof arch.arhdr; |
| 656 | |
| 657 | /* The nested archive file will have been opened and setup by |
| 658 | get_archive_member_name. */ |
| 659 | if (fseek (nested_arch.file, archive_file_offset, |
| 660 | SEEK_SET) != 0) |
| 661 | { |
| 662 | error (_("%s: failed to seek to archive member\n"), |
| 663 | nested_arch.file_name); |
| 664 | ret = 1; |
| 665 | break; |
| 666 | } |
| 667 | |
| 668 | ret |= process_object (qualified_name, nested_arch.file); |
| 669 | } |
| 670 | else |
| 671 | { |
| 672 | archive_file_offset = arch.next_arhdr_offset; |
| 673 | arch.next_arhdr_offset += archive_file_size; |
| 674 | |
| 675 | ret |= process_object (qualified_name, file); |
| 676 | } |
| 677 | |
| 678 | free (qualified_name); |
| 679 | } |
| 680 | |
| 681 | out: |
| 682 | if (nested_arch.file != NULL) |
| 683 | fclose (nested_arch.file); |
| 684 | release_archive (&nested_arch); |
| 685 | release_archive (&arch); |
| 686 | |
| 687 | return ret; |
| 688 | } |
| 689 | |
| 690 | static int |
| 691 | check_file (const char *file_name, struct stat *statbuf_p) |
| 692 | { |
| 693 | struct stat statbuf; |
| 694 | |
| 695 | if (statbuf_p == NULL) |
| 696 | statbuf_p = &statbuf; |
| 697 | |
| 698 | if (stat (file_name, statbuf_p) < 0) |
| 699 | { |
| 700 | if (errno == ENOENT) |
| 701 | error (_("'%s': No such file\n"), file_name); |
| 702 | else |
| 703 | error (_("Could not locate '%s'. System error message: %s\n"), |
| 704 | file_name, strerror (errno)); |
| 705 | return 1; |
| 706 | } |
| 707 | |
| 708 | if (! S_ISREG (statbuf_p->st_mode)) |
| 709 | { |
| 710 | error (_("'%s' is not an ordinary file\n"), file_name); |
| 711 | return 1; |
| 712 | } |
| 713 | |
| 714 | return 0; |
| 715 | } |
| 716 | |
| 717 | static int |
| 718 | process_file (const char *file_name) |
| 719 | { |
| 720 | FILE * file; |
| 721 | char armag[SARMAG]; |
| 722 | int ret; |
| 723 | |
| 724 | if (check_file (file_name, NULL)) |
| 725 | return 1; |
| 726 | |
| 727 | file = fopen (file_name, "r+b"); |
| 728 | if (file == NULL) |
| 729 | { |
| 730 | error (_("Input file '%s' is not readable\n"), file_name); |
| 731 | return 1; |
| 732 | } |
| 733 | |
| 734 | if (fread (armag, SARMAG, 1, file) != 1) |
| 735 | { |
| 736 | error (_("%s: Failed to read file's magic number\n"), |
| 737 | file_name); |
| 738 | fclose (file); |
| 739 | return 1; |
| 740 | } |
| 741 | |
| 742 | if (memcmp (armag, ARMAG, SARMAG) == 0) |
| 743 | ret = process_archive (file_name, file, FALSE); |
| 744 | else if (memcmp (armag, ARMAGT, SARMAG) == 0) |
| 745 | ret = process_archive (file_name, file, TRUE); |
| 746 | else |
| 747 | { |
| 748 | rewind (file); |
| 749 | archive_file_size = archive_file_offset = 0; |
| 750 | ret = process_object (file_name, file); |
| 751 | #ifdef HAVE_MMAP |
| 752 | if (!ret |
| 753 | && (elf_header.e_type == ET_EXEC |
| 754 | || elf_header.e_type == ET_DYN)) |
| 755 | ret = update_gnu_property (file_name, file); |
| 756 | #endif |
| 757 | } |
| 758 | |
| 759 | fclose (file); |
| 760 | |
| 761 | return ret; |
| 762 | } |
| 763 | |
| 764 | static const struct |
| 765 | { |
| 766 | int osabi; |
| 767 | const char *name; |
| 768 | } |
| 769 | osabis[] = |
| 770 | { |
| 771 | { ELFOSABI_NONE, "none" }, |
| 772 | { ELFOSABI_HPUX, "HPUX" }, |
| 773 | { ELFOSABI_NETBSD, "NetBSD" }, |
| 774 | { ELFOSABI_GNU, "GNU" }, |
| 775 | { ELFOSABI_GNU, "Linux" }, |
| 776 | { ELFOSABI_SOLARIS, "Solaris" }, |
| 777 | { ELFOSABI_AIX, "AIX" }, |
| 778 | { ELFOSABI_IRIX, "Irix" }, |
| 779 | { ELFOSABI_FREEBSD, "FreeBSD" }, |
| 780 | { ELFOSABI_TRU64, "TRU64" }, |
| 781 | { ELFOSABI_MODESTO, "Modesto" }, |
| 782 | { ELFOSABI_OPENBSD, "OpenBSD" }, |
| 783 | { ELFOSABI_OPENVMS, "OpenVMS" }, |
| 784 | { ELFOSABI_NSK, "NSK" }, |
| 785 | { ELFOSABI_AROS, "AROS" }, |
| 786 | { ELFOSABI_FENIXOS, "FenixOS" } |
| 787 | }; |
| 788 | |
| 789 | /* Return ELFOSABI_XXX for an OSABI string, OSABI. */ |
| 790 | |
| 791 | static int |
| 792 | elf_osabi (const char *osabi) |
| 793 | { |
| 794 | unsigned int i; |
| 795 | |
| 796 | for (i = 0; i < ARRAY_SIZE (osabis); i++) |
| 797 | if (strcasecmp (osabi, osabis[i].name) == 0) |
| 798 | return osabis[i].osabi; |
| 799 | |
| 800 | error (_("Unknown OSABI: %s\n"), osabi); |
| 801 | |
| 802 | return -1; |
| 803 | } |
| 804 | |
| 805 | /* Return EM_XXX for a machine string, MACH. */ |
| 806 | |
| 807 | static int |
| 808 | elf_machine (const char *mach) |
| 809 | { |
| 810 | if (strcasecmp (mach, "i386") == 0) |
| 811 | return EM_386; |
| 812 | if (strcasecmp (mach, "iamcu") == 0) |
| 813 | return EM_IAMCU; |
| 814 | if (strcasecmp (mach, "l1om") == 0) |
| 815 | return EM_L1OM; |
| 816 | if (strcasecmp (mach, "k1om") == 0) |
| 817 | return EM_K1OM; |
| 818 | if (strcasecmp (mach, "x86_64") == 0) |
| 819 | return EM_X86_64; |
| 820 | if (strcasecmp (mach, "x86-64") == 0) |
| 821 | return EM_X86_64; |
| 822 | if (strcasecmp (mach, "none") == 0) |
| 823 | return EM_NONE; |
| 824 | |
| 825 | error (_("Unknown machine type: %s\n"), mach); |
| 826 | |
| 827 | return -1; |
| 828 | } |
| 829 | |
| 830 | /* Return ET_XXX for a type string, TYPE. */ |
| 831 | |
| 832 | static int |
| 833 | elf_type (const char *type) |
| 834 | { |
| 835 | if (strcasecmp (type, "rel") == 0) |
| 836 | return ET_REL; |
| 837 | if (strcasecmp (type, "exec") == 0) |
| 838 | return ET_EXEC; |
| 839 | if (strcasecmp (type, "dyn") == 0) |
| 840 | return ET_DYN; |
| 841 | if (strcasecmp (type, "none") == 0) |
| 842 | return ET_NONE; |
| 843 | |
| 844 | error (_("Unknown type: %s\n"), type); |
| 845 | |
| 846 | return -1; |
| 847 | } |
| 848 | |
| 849 | enum command_line_switch |
| 850 | { |
| 851 | OPTION_INPUT_MACH = 150, |
| 852 | OPTION_OUTPUT_MACH, |
| 853 | OPTION_INPUT_TYPE, |
| 854 | OPTION_OUTPUT_TYPE, |
| 855 | OPTION_INPUT_OSABI, |
| 856 | OPTION_OUTPUT_OSABI, |
| 857 | #ifdef HAVE_MMAP |
| 858 | OPTION_ENABLE_X86_FEATURE, |
| 859 | OPTION_DISABLE_X86_FEATURE, |
| 860 | #endif |
| 861 | }; |
| 862 | |
| 863 | static struct option options[] = |
| 864 | { |
| 865 | {"input-mach", required_argument, 0, OPTION_INPUT_MACH}, |
| 866 | {"output-mach", required_argument, 0, OPTION_OUTPUT_MACH}, |
| 867 | {"input-type", required_argument, 0, OPTION_INPUT_TYPE}, |
| 868 | {"output-type", required_argument, 0, OPTION_OUTPUT_TYPE}, |
| 869 | {"input-osabi", required_argument, 0, OPTION_INPUT_OSABI}, |
| 870 | {"output-osabi", required_argument, 0, OPTION_OUTPUT_OSABI}, |
| 871 | #ifdef HAVE_MMAP |
| 872 | {"enable-x86-feature", |
| 873 | required_argument, 0, OPTION_ENABLE_X86_FEATURE}, |
| 874 | {"disable-x86-feature", |
| 875 | required_argument, 0, OPTION_DISABLE_X86_FEATURE}, |
| 876 | #endif |
| 877 | {"version", no_argument, 0, 'v'}, |
| 878 | {"help", no_argument, 0, 'h'}, |
| 879 | {0, no_argument, 0, 0} |
| 880 | }; |
| 881 | |
| 882 | ATTRIBUTE_NORETURN static void |
| 883 | usage (FILE *stream, int exit_status) |
| 884 | { |
| 885 | fprintf (stream, _("Usage: %s <option(s)> elffile(s)\n"), |
| 886 | program_name); |
| 887 | fprintf (stream, _(" Update the ELF header of ELF files\n")); |
| 888 | fprintf (stream, _(" The options are:\n")); |
| 889 | fprintf (stream, _("\ |
| 890 | --input-mach <machine> Set input machine type to <machine>\n\ |
| 891 | --output-mach <machine> Set output machine type to <machine>\n\ |
| 892 | --input-type <type> Set input file type to <type>\n\ |
| 893 | --output-type <type> Set output file type to <type>\n\ |
| 894 | --input-osabi <osabi> Set input OSABI to <osabi>\n\ |
| 895 | --output-osabi <osabi> Set output OSABI to <osabi>\n")); |
| 896 | #ifdef HAVE_MMAP |
| 897 | fprintf (stream, _("\ |
| 898 | --enable-x86-feature <feature>\n\ |
| 899 | Enable x86 feature <feature>\n\ |
| 900 | --disable-x86-feature <feature>\n\ |
| 901 | Disable x86 feature <feature>\n")); |
| 902 | #endif |
| 903 | fprintf (stream, _("\ |
| 904 | -h --help Display this information\n\ |
| 905 | -v --version Display the version number of %s\n\ |
| 906 | "), |
| 907 | program_name); |
| 908 | if (REPORT_BUGS_TO[0] && exit_status == 0) |
| 909 | fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); |
| 910 | exit (exit_status); |
| 911 | } |
| 912 | |
| 913 | int |
| 914 | main (int argc, char ** argv) |
| 915 | { |
| 916 | int c, status; |
| 917 | |
| 918 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) |
| 919 | setlocale (LC_MESSAGES, ""); |
| 920 | #endif |
| 921 | #if defined (HAVE_SETLOCALE) |
| 922 | setlocale (LC_CTYPE, ""); |
| 923 | #endif |
| 924 | bindtextdomain (PACKAGE, LOCALEDIR); |
| 925 | textdomain (PACKAGE); |
| 926 | |
| 927 | expandargv (&argc, &argv); |
| 928 | |
| 929 | while ((c = getopt_long (argc, argv, "hv", |
| 930 | options, (int *) 0)) != EOF) |
| 931 | { |
| 932 | switch (c) |
| 933 | { |
| 934 | case OPTION_INPUT_MACH: |
| 935 | input_elf_machine = elf_machine (optarg); |
| 936 | if (input_elf_machine < 0) |
| 937 | return 1; |
| 938 | input_elf_class = elf_class (input_elf_machine); |
| 939 | if (input_elf_class == ELF_CLASS_UNKNOWN) |
| 940 | return 1; |
| 941 | break; |
| 942 | |
| 943 | case OPTION_OUTPUT_MACH: |
| 944 | output_elf_machine = elf_machine (optarg); |
| 945 | if (output_elf_machine < 0) |
| 946 | return 1; |
| 947 | output_elf_class = elf_class (output_elf_machine); |
| 948 | if (output_elf_class == ELF_CLASS_UNKNOWN) |
| 949 | return 1; |
| 950 | break; |
| 951 | |
| 952 | case OPTION_INPUT_TYPE: |
| 953 | input_elf_type = elf_type (optarg); |
| 954 | if (input_elf_type < 0) |
| 955 | return 1; |
| 956 | break; |
| 957 | |
| 958 | case OPTION_OUTPUT_TYPE: |
| 959 | output_elf_type = elf_type (optarg); |
| 960 | if (output_elf_type < 0) |
| 961 | return 1; |
| 962 | break; |
| 963 | |
| 964 | case OPTION_INPUT_OSABI: |
| 965 | input_elf_osabi = elf_osabi (optarg); |
| 966 | if (input_elf_osabi < 0) |
| 967 | return 1; |
| 968 | break; |
| 969 | |
| 970 | case OPTION_OUTPUT_OSABI: |
| 971 | output_elf_osabi = elf_osabi (optarg); |
| 972 | if (output_elf_osabi < 0) |
| 973 | return 1; |
| 974 | break; |
| 975 | |
| 976 | #ifdef HAVE_MMAP |
| 977 | case OPTION_ENABLE_X86_FEATURE: |
| 978 | if (elf_x86_feature (optarg, 1) < 0) |
| 979 | return 1; |
| 980 | break; |
| 981 | |
| 982 | case OPTION_DISABLE_X86_FEATURE: |
| 983 | if (elf_x86_feature (optarg, 0) < 0) |
| 984 | return 1; |
| 985 | break; |
| 986 | #endif |
| 987 | |
| 988 | case 'h': |
| 989 | usage (stdout, 0); |
| 990 | |
| 991 | case 'v': |
| 992 | print_version (program_name); |
| 993 | break; |
| 994 | |
| 995 | default: |
| 996 | usage (stderr, 1); |
| 997 | } |
| 998 | } |
| 999 | |
| 1000 | if (optind == argc |
| 1001 | || (output_elf_machine == -1 |
| 1002 | #ifdef HAVE_MMAP |
| 1003 | && ! enable_x86_features |
| 1004 | && ! disable_x86_features |
| 1005 | #endif |
| 1006 | && output_elf_type == -1 |
| 1007 | && output_elf_osabi == -1)) |
| 1008 | usage (stderr, 1); |
| 1009 | |
| 1010 | status = 0; |
| 1011 | while (optind < argc) |
| 1012 | status |= process_file (argv[optind++]); |
| 1013 | |
| 1014 | return status; |
| 1015 | } |