1 /* $NetBSD: cd9660_eltorito.c,v 1.21 2017/01/24 11:22:43 nonaka Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan 5 * Perez-Rathke and Ram Vedam. All rights reserved. 6 * 7 * This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys, 8 * Alan Perez-Rathke and Ram Vedam. 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer in the documentation and/or other materials provided 18 * with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN 21 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24 * DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN 25 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 * USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 32 * OF SUCH DAMAGE. 33 */ 34 35 36 #include "cd9660.h" 37 #include "cd9660_eltorito.h" 38 #include <sys/bootblock.h> 39 #include <util.h> 40 41 #include <sys/cdefs.h> 42 #if defined(__RCSID) && !defined(__lint) 43 __RCSID("$NetBSD: cd9660_eltorito.c,v 1.21 2017/01/24 11:22:43 nonaka Exp $"); 44 #endif /* !__lint */ 45 46 #ifdef DEBUG 47 #define ELTORITO_DPRINTF(__x) printf __x 48 #else 49 #define ELTORITO_DPRINTF(__x) 50 #endif 51 52 #include <util.h> 53 54 static struct boot_catalog_entry *cd9660_init_boot_catalog_entry(void); 55 static struct boot_catalog_entry *cd9660_boot_setup_validation_entry(char); 56 static struct boot_catalog_entry *cd9660_boot_setup_default_entry( 57 struct cd9660_boot_image *); 58 static struct boot_catalog_entry *cd9660_boot_setup_section_head(char); 59 #if 0 60 static u_char cd9660_boot_get_system_type(struct cd9660_boot_image *); 61 #endif 62 63 static struct cd9660_boot_image *default_boot_image; 64 65 int 66 cd9660_add_boot_disk(iso9660_disk *diskStructure, const char *boot_info) 67 { 68 struct stat stbuf; 69 const char *mode_msg; 70 char *temp; 71 char *sysname; 72 char *filename; 73 struct cd9660_boot_image *new_image, *tmp_image; 74 75 assert(boot_info != NULL); 76 77 if (*boot_info == '\0') { 78 warnx("Error: Boot disk information must be in the " 79 "format 'system;filename'"); 80 return 0; 81 } 82 83 /* First decode the boot information */ 84 temp = estrdup(boot_info); 85 86 sysname = temp; 87 filename = strchr(sysname, ';'); 88 if (filename == NULL) { 89 warnx("supply boot disk information in the format " 90 "'system;filename'"); 91 free(temp); 92 return 0; 93 } 94 95 *filename++ = '\0'; 96 97 if (diskStructure->verbose_level > 0) { 98 printf("Found bootdisk with system %s, and filename %s\n", 99 sysname, filename); 100 } 101 new_image = ecalloc(1, sizeof(*new_image)); 102 new_image->loadSegment = 0; /* default for now */ 103 104 /* Decode System */ 105 if (strcmp(sysname, "i386") == 0) 106 new_image->system = ET_SYS_X86; 107 else if (strcmp(sysname, "powerpc") == 0) 108 new_image->system = ET_SYS_PPC; 109 else if (strcmp(sysname, "macppc") == 0 || 110 strcmp(sysname, "mac68k") == 0) 111 new_image->system = ET_SYS_MAC; 112 else { 113 warnx("boot disk system must be " 114 "i386, powerpc, macppc, or mac68k"); 115 free(temp); 116 free(new_image); 117 return 0; 118 } 119 120 121 new_image->filename = estrdup(filename); 122 123 free(temp); 124 125 /* Get information about the file */ 126 if (lstat(new_image->filename, &stbuf) == -1) 127 err(EXIT_FAILURE, "%s: lstat(\"%s\")", __func__, 128 new_image->filename); 129 130 switch (stbuf.st_size) { 131 case 1440 * 1024: 132 new_image->targetMode = ET_MEDIA_144FDD; 133 mode_msg = "Assigned boot image to 1.44 emulation mode"; 134 break; 135 case 1200 * 1024: 136 new_image->targetMode = ET_MEDIA_12FDD; 137 mode_msg = "Assigned boot image to 1.2 emulation mode"; 138 break; 139 case 2880 * 1024: 140 new_image->targetMode = ET_MEDIA_288FDD; 141 mode_msg = "Assigned boot image to 2.88 emulation mode"; 142 break; 143 default: 144 new_image->targetMode = ET_MEDIA_NOEM; 145 mode_msg = "Assigned boot image to no emulation mode"; 146 break; 147 } 148 149 if (diskStructure->verbose_level > 0) 150 printf("%s\n", mode_msg); 151 152 new_image->size = stbuf.st_size; 153 new_image->num_sectors = 154 howmany(new_image->size, diskStructure->sectorSize) * 155 howmany(diskStructure->sectorSize, 512); 156 if (diskStructure->verbose_level > 0) { 157 printf("New image has size %d, uses %d 512-byte sectors\n", 158 new_image->size, new_image->num_sectors); 159 } 160 new_image->sector = -1; 161 /* Bootable by default */ 162 new_image->bootable = ET_BOOTABLE; 163 /* Add boot disk */ 164 165 /* Group images for the same platform together. */ 166 TAILQ_FOREACH(tmp_image, &diskStructure->boot_images, image_list) { 167 if (tmp_image->system != new_image->system) 168 break; 169 } 170 171 if (tmp_image == NULL) { 172 TAILQ_INSERT_HEAD(&diskStructure->boot_images, new_image, 173 image_list); 174 } else 175 TAILQ_INSERT_BEFORE(tmp_image, new_image, image_list); 176 177 new_image->serialno = diskStructure->image_serialno++; 178 179 new_image->platform_id = new_image->system; 180 181 /* TODO : Need to do anything about the boot image in the tree? */ 182 diskStructure->is_bootable = 1; 183 184 /* First boot image is initial/default entry. */ 185 if (default_boot_image == NULL) 186 default_boot_image = new_image; 187 188 return 1; 189 } 190 191 int 192 cd9660_eltorito_add_boot_option(iso9660_disk *diskStructure, 193 const char *option_string, const char *value) 194 { 195 char *eptr; 196 struct cd9660_boot_image *image; 197 198 assert(option_string != NULL); 199 200 /* Find the last image added */ 201 TAILQ_FOREACH(image, &diskStructure->boot_images, image_list) { 202 if (image->serialno + 1 == diskStructure->image_serialno) 203 break; 204 } 205 if (image == NULL) 206 errx(EXIT_FAILURE, "Attempted to add boot option, " 207 "but no boot images have been specified"); 208 209 if (strcmp(option_string, "no-emul-boot") == 0) { 210 image->targetMode = ET_MEDIA_NOEM; 211 } else if (strcmp(option_string, "no-boot") == 0) { 212 image->bootable = ET_NOT_BOOTABLE; 213 } else if (strcmp(option_string, "hard-disk-boot") == 0) { 214 image->targetMode = ET_MEDIA_HDD; 215 } else if (strcmp(option_string, "boot-load-segment") == 0) { 216 image->loadSegment = strtoul(value, &eptr, 16); 217 if (eptr == value || *eptr != '\0' || errno != ERANGE) { 218 warn("%s: strtoul", __func__); 219 return 0; 220 } 221 } else if (strcmp(option_string, "platformid") == 0) { 222 if (strcmp(value, "efi") == 0) 223 image->platform_id = ET_SYS_EFI; 224 else { 225 warn("%s: unknown platform: %s", __func__, value); 226 return 0; 227 } 228 } else { 229 return 0; 230 } 231 return 1; 232 } 233 234 static struct boot_catalog_entry * 235 cd9660_init_boot_catalog_entry(void) 236 { 237 return ecalloc(1, sizeof(struct boot_catalog_entry)); 238 } 239 240 static struct boot_catalog_entry * 241 cd9660_boot_setup_validation_entry(char sys) 242 { 243 struct boot_catalog_entry *entry; 244 boot_catalog_validation_entry *ve; 245 int16_t checksum; 246 unsigned char *csptr; 247 size_t i; 248 entry = cd9660_init_boot_catalog_entry(); 249 250 ve = &entry->entry_data.VE; 251 252 ve->header_id[0] = 1; 253 ve->platform_id[0] = sys; 254 ve->key[0] = 0x55; 255 ve->key[1] = 0xAA; 256 257 /* Calculate checksum */ 258 checksum = 0; 259 cd9660_721(0, ve->checksum); 260 csptr = (unsigned char*)ve; 261 for (i = 0; i < sizeof(*ve); i += 2) { 262 checksum += (int16_t)csptr[i]; 263 checksum += 256 * (int16_t)csptr[i + 1]; 264 } 265 checksum = -checksum; 266 cd9660_721(checksum, ve->checksum); 267 268 ELTORITO_DPRINTF(("%s: header_id %d, platform_id %d, key[0] %d, key[1] %d, " 269 "checksum %04x\n", __func__, ve->header_id[0], ve->platform_id[0], 270 ve->key[0], ve->key[1], checksum)); 271 return entry; 272 } 273 274 static struct boot_catalog_entry * 275 cd9660_boot_setup_default_entry(struct cd9660_boot_image *disk) 276 { 277 struct boot_catalog_entry *default_entry; 278 boot_catalog_initial_entry *ie; 279 280 default_entry = cd9660_init_boot_catalog_entry(); 281 if (default_entry == NULL) 282 return NULL; 283 284 ie = &default_entry->entry_data.IE; 285 286 ie->boot_indicator[0] = disk->bootable; 287 ie->media_type[0] = disk->targetMode; 288 cd9660_721(disk->loadSegment, ie->load_segment); 289 ie->system_type[0] = disk->system; 290 cd9660_721(disk->num_sectors, ie->sector_count); 291 cd9660_731(disk->sector, ie->load_rba); 292 293 ELTORITO_DPRINTF(("%s: boot indicator %d, media type %d, " 294 "load segment %04x, system type %d, sector count %d, " 295 "load rba %d\n", __func__, ie->boot_indicator[0], 296 ie->media_type[0], disk->loadSegment, ie->system_type[0], 297 disk->num_sectors, disk->sector)); 298 return default_entry; 299 } 300 301 static struct boot_catalog_entry * 302 cd9660_boot_setup_section_head(char platform) 303 { 304 struct boot_catalog_entry *entry; 305 boot_catalog_section_header *sh; 306 307 entry = cd9660_init_boot_catalog_entry(); 308 if (entry == NULL) 309 return NULL; 310 311 sh = &entry->entry_data.SH; 312 /* More by default. The last one will manually be set to 0x91 */ 313 sh->header_indicator[0] = ET_SECTION_HEADER_MORE; 314 sh->platform_id[0] = platform; 315 sh->num_section_entries[0] = 0; 316 return entry; 317 } 318 319 static struct boot_catalog_entry * 320 cd9660_boot_setup_section_entry(struct cd9660_boot_image *disk) 321 { 322 struct boot_catalog_entry *entry; 323 boot_catalog_section_entry *se; 324 if ((entry = cd9660_init_boot_catalog_entry()) == NULL) 325 return NULL; 326 327 se = &entry->entry_data.SE; 328 329 se->boot_indicator[0] = ET_BOOTABLE; 330 se->media_type[0] = disk->targetMode; 331 cd9660_721(disk->loadSegment, se->load_segment); 332 cd9660_721(disk->num_sectors, se->sector_count); 333 cd9660_731(disk->sector, se->load_rba); 334 return entry; 335 } 336 337 #if 0 338 static u_char 339 cd9660_boot_get_system_type(struct cd9660_boot_image *disk) 340 { 341 /* 342 For hard drive booting, we need to examine the MBR to figure 343 out what the partition type is 344 */ 345 return 0; 346 } 347 #endif 348 349 /* 350 * Set up the BVD, Boot catalog, and the boot entries, but do no writing 351 */ 352 int 353 cd9660_setup_boot(iso9660_disk *diskStructure, int first_sector) 354 { 355 int sector; 356 int used_sectors; 357 int num_entries = 0; 358 int catalog_sectors; 359 struct boot_catalog_entry *x86_head, *mac_head, *ppc_head, *efi_head, 360 *valid_entry, *default_entry, *temp, *head, **headp, *next; 361 struct cd9660_boot_image *tmp_disk; 362 363 headp = NULL; 364 x86_head = mac_head = ppc_head = efi_head = NULL; 365 366 /* If there are no boot disks, don't bother building boot information */ 367 if (TAILQ_EMPTY(&diskStructure->boot_images)) 368 return 0; 369 370 /* Point to catalog: For now assume it consumes one sector */ 371 ELTORITO_DPRINTF(("Boot catalog will go in sector %d\n", first_sector)); 372 diskStructure->boot_catalog_sector = first_sector; 373 cd9660_bothendian_dword(first_sector, 374 diskStructure->boot_descriptor->boot_catalog_pointer); 375 376 /* Step 1: Generate boot catalog */ 377 /* Step 1a: Validation entry */ 378 valid_entry = cd9660_boot_setup_validation_entry(ET_SYS_X86); 379 if (valid_entry == NULL) 380 return -1; 381 382 /* 383 * Count how many boot images there are, 384 * and how many sectors they consume. 385 */ 386 num_entries = 1; 387 used_sectors = 0; 388 389 TAILQ_FOREACH(tmp_disk, &diskStructure->boot_images, image_list) { 390 used_sectors += tmp_disk->num_sectors; 391 392 /* One default entry per image */ 393 num_entries++; 394 } 395 catalog_sectors = howmany(num_entries * 0x20, diskStructure->sectorSize); 396 used_sectors += catalog_sectors; 397 398 if (diskStructure->verbose_level > 0) { 399 printf("%s: there will be %i entries consuming %i sectors. " 400 "Catalog is %i sectors\n", __func__, num_entries, 401 used_sectors, catalog_sectors); 402 } 403 404 /* Populate sector numbers */ 405 sector = first_sector + catalog_sectors; 406 TAILQ_FOREACH(tmp_disk, &diskStructure->boot_images, image_list) { 407 tmp_disk->sector = sector; 408 sector += tmp_disk->num_sectors / 409 (diskStructure->sectorSize / 512); 410 } 411 412 LIST_INSERT_HEAD(&diskStructure->boot_entries, valid_entry, ll_struct); 413 414 /* Step 1b: Initial/default entry */ 415 /* TODO : PARAM */ 416 if (default_boot_image != NULL) { 417 struct cd9660_boot_image *tcbi; 418 TAILQ_FOREACH(tcbi, &diskStructure->boot_images, image_list) { 419 if (tcbi == default_boot_image) { 420 tmp_disk = tcbi; 421 break; 422 } 423 } 424 } 425 if (tmp_disk == NULL) 426 tmp_disk = TAILQ_FIRST(&diskStructure->boot_images); 427 default_entry = cd9660_boot_setup_default_entry(tmp_disk); 428 if (default_entry == NULL) { 429 warnx("Error: memory allocation failed in cd9660_setup_boot"); 430 return -1; 431 } 432 433 LIST_INSERT_AFTER(valid_entry, default_entry, ll_struct); 434 435 /* Todo: multiple default entries? */ 436 437 tmp_disk = TAILQ_FIRST(&diskStructure->boot_images); 438 439 head = NULL; 440 temp = default_entry; 441 442 /* If multiple boot images are given : */ 443 for (; tmp_disk != NULL; tmp_disk = TAILQ_NEXT(tmp_disk, image_list)) { 444 if (tmp_disk == default_boot_image) 445 continue; 446 447 /* Step 2: Section header */ 448 switch (tmp_disk->platform_id) { 449 case ET_SYS_X86: 450 headp = &x86_head; 451 break; 452 case ET_SYS_PPC: 453 headp = &ppc_head; 454 break; 455 case ET_SYS_MAC: 456 headp = &mac_head; 457 break; 458 case ET_SYS_EFI: 459 headp = &efi_head; 460 break; 461 default: 462 warnx("%s: internal error: unknown system type", 463 __func__); 464 return -1; 465 } 466 467 if (*headp == NULL) { 468 head = 469 cd9660_boot_setup_section_head(tmp_disk->platform_id); 470 if (head == NULL) { 471 warnx("Error: memory allocation failed in " 472 "cd9660_setup_boot"); 473 return -1; 474 } 475 LIST_INSERT_AFTER(default_entry, head, ll_struct); 476 *headp = head; 477 } else 478 head = *headp; 479 480 head->entry_data.SH.num_section_entries[0]++; 481 482 /* Step 2a: Section entry and extensions */ 483 temp = cd9660_boot_setup_section_entry(tmp_disk); 484 if (temp == NULL) { 485 warn("%s: cd9660_boot_setup_section_entry", __func__); 486 return -1; 487 } 488 489 while ((next = LIST_NEXT(head, ll_struct)) != NULL && 490 next->entry_type == ET_ENTRY_SE) 491 head = next; 492 493 LIST_INSERT_AFTER(head, temp, ll_struct); 494 } 495 496 if (head != NULL) 497 head->entry_data.SH.header_indicator[0] = ET_SECTION_HEADER_LAST; 498 499 /* TODO: Remaining boot disks when implemented */ 500 501 return first_sector + used_sectors; 502 } 503 504 int 505 cd9660_setup_boot_volume_descriptor(iso9660_disk *diskStructure, 506 volume_descriptor *bvd) 507 { 508 boot_volume_descriptor *bvdData = 509 (boot_volume_descriptor*)bvd->volumeDescriptorData; 510 511 bvdData->boot_record_indicator[0] = ISO_VOLUME_DESCRIPTOR_BOOT; 512 memcpy(bvdData->identifier, ISO_VOLUME_DESCRIPTOR_STANDARD_ID, 5); 513 bvdData->version[0] = 1; 514 memcpy(bvdData->boot_system_identifier, ET_ID, 23); 515 memcpy(bvdData->identifier, ISO_VOLUME_DESCRIPTOR_STANDARD_ID, 5); 516 diskStructure->boot_descriptor = 517 (boot_volume_descriptor*) bvd->volumeDescriptorData; 518 return 1; 519 } 520 521 static int 522 cd9660_write_mbr_partition_entry(FILE *fd, int idx, off_t sector_start, 523 off_t nsectors, int type) 524 { 525 uint8_t val; 526 uint32_t lba; 527 528 if (fseeko(fd, (off_t)(idx) * 16 + 0x1be, SEEK_SET) == -1) 529 err(1, "fseeko"); 530 531 val = 0x80; /* Bootable */ 532 fwrite(&val, sizeof(val), 1, fd); 533 534 val = 0xff; /* CHS begin */ 535 fwrite(&val, sizeof(val), 1, fd); 536 fwrite(&val, sizeof(val), 1, fd); 537 fwrite(&val, sizeof(val), 1, fd); 538 539 val = type; /* Part type */ 540 fwrite(&val, sizeof(val), 1, fd); 541 542 val = 0xff; /* CHS end */ 543 fwrite(&val, sizeof(val), 1, fd); 544 fwrite(&val, sizeof(val), 1, fd); 545 fwrite(&val, sizeof(val), 1, fd); 546 547 /* LBA extent */ 548 lba = htole32(sector_start); 549 fwrite(&lba, sizeof(lba), 1, fd); 550 lba = htole32(nsectors); 551 fwrite(&lba, sizeof(lba), 1, fd); 552 553 return 0; 554 } 555 556 static int 557 cd9660_write_apm_partition_entry(FILE *fd, int idx, int total_partitions, 558 off_t sector_start, off_t nsectors, off_t sector_size, 559 const char *part_name, const char *part_type) 560 { 561 uint32_t apm32, part_status; 562 uint16_t apm16; 563 564 /* See Apple Tech Note 1189 for the details about the pmPartStatus 565 * flags. 566 * Below the flags which are default: 567 * - IsValid 0x01 568 * - IsAllocated 0x02 569 * - IsReadable 0x10 570 * - IsWritable 0x20 571 */ 572 part_status = APPLE_PS_VALID | APPLE_PS_ALLOCATED | APPLE_PS_READABLE | 573 APPLE_PS_WRITABLE; 574 575 if (fseeko(fd, (off_t)(idx + 1) * sector_size, SEEK_SET) == -1) 576 err(1, "fseeko"); 577 578 /* Signature */ 579 apm16 = htobe16(0x504d); 580 fwrite(&apm16, sizeof(apm16), 1, fd); 581 apm16 = 0; 582 fwrite(&apm16, sizeof(apm16), 1, fd); 583 584 /* Total number of partitions */ 585 apm32 = htobe32(total_partitions); 586 fwrite(&apm32, sizeof(apm32), 1, fd); 587 /* Bounds */ 588 apm32 = htobe32(sector_start); 589 fwrite(&apm32, sizeof(apm32), 1, fd); 590 apm32 = htobe32(nsectors); 591 fwrite(&apm32, sizeof(apm32), 1, fd); 592 593 fwrite(part_name, strlen(part_name) + 1, 1, fd); 594 fseek(fd, 32 - strlen(part_name) - 1, SEEK_CUR); 595 fwrite(part_type, strlen(part_type) + 1, 1, fd); 596 fseek(fd, 32 - strlen(part_type) - 1, SEEK_CUR); 597 598 apm32 = 0; 599 /* pmLgDataStart */ 600 fwrite(&apm32, sizeof(apm32), 1, fd); 601 /* pmDataCnt */ 602 apm32 = htobe32(nsectors); 603 fwrite(&apm32, sizeof(apm32), 1, fd); 604 /* pmPartStatus */ 605 apm32 = htobe32(part_status); 606 fwrite(&apm32, sizeof(apm32), 1, fd); 607 608 return 0; 609 } 610 611 int 612 cd9660_write_boot(iso9660_disk *diskStructure, FILE *fd) 613 { 614 struct boot_catalog_entry *e; 615 struct cd9660_boot_image *t; 616 int apm_partitions = 0; 617 int mbr_partitions = 0; 618 619 /* write boot catalog */ 620 if (fseeko(fd, (off_t)diskStructure->boot_catalog_sector * 621 diskStructure->sectorSize, SEEK_SET) == -1) 622 err(1, "fseeko"); 623 624 if (diskStructure->verbose_level > 0) { 625 printf("Writing boot catalog to sector %" PRId64 "\n", 626 diskStructure->boot_catalog_sector); 627 } 628 LIST_FOREACH(e, &diskStructure->boot_entries, ll_struct) { 629 if (diskStructure->verbose_level > 0) { 630 printf("Writing catalog entry of type %d\n", 631 e->entry_type); 632 } 633 /* 634 * It doesnt matter which one gets written 635 * since they are the same size 636 */ 637 fwrite(&(e->entry_data.VE), 1, 32, fd); 638 } 639 if (diskStructure->verbose_level > 0) 640 printf("Finished writing boot catalog\n"); 641 642 /* copy boot images */ 643 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list) { 644 if (diskStructure->verbose_level > 0) { 645 printf("Writing boot image from %s to sectors %d\n", 646 t->filename, t->sector); 647 } 648 cd9660_copy_file(diskStructure, fd, t->sector, t->filename); 649 650 if (t->system == ET_SYS_MAC) 651 apm_partitions++; 652 if (t->system == ET_SYS_PPC) 653 mbr_partitions++; 654 } 655 656 /* some systems need partition tables as well */ 657 if (mbr_partitions > 0 || diskStructure->chrp_boot) { 658 uint16_t sig; 659 660 fseek(fd, 0x1fe, SEEK_SET); 661 sig = htole16(0xaa55); 662 fwrite(&sig, sizeof(sig), 1, fd); 663 664 mbr_partitions = 0; 665 666 /* Write ISO9660 descriptor, enclosing the whole disk */ 667 if (diskStructure->chrp_boot) 668 cd9660_write_mbr_partition_entry(fd, mbr_partitions++, 669 0, diskStructure->totalSectors * 670 (diskStructure->sectorSize / 512), 0x96); 671 672 /* Write all partition entries */ 673 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list) { 674 if (t->system != ET_SYS_PPC) 675 continue; 676 cd9660_write_mbr_partition_entry(fd, mbr_partitions++, 677 t->sector * (diskStructure->sectorSize / 512), 678 t->num_sectors * (diskStructure->sectorSize / 512), 679 0x41 /* PReP Boot */); 680 } 681 } 682 683 if (apm_partitions > 0) { 684 /* Write DDR and global APM info */ 685 uint32_t apm32; 686 uint16_t apm16; 687 int total_parts; 688 689 fseek(fd, 0, SEEK_SET); 690 apm16 = htobe16(0x4552); 691 fwrite(&apm16, sizeof(apm16), 1, fd); 692 /* Device block size */ 693 apm16 = htobe16(512); 694 fwrite(&apm16, sizeof(apm16), 1, fd); 695 /* Device block count */ 696 apm32 = htobe32(diskStructure->totalSectors * 697 (diskStructure->sectorSize / 512)); 698 fwrite(&apm32, sizeof(apm32), 1, fd); 699 /* Device type/id */ 700 apm16 = htobe16(1); 701 fwrite(&apm16, sizeof(apm16), 1, fd); 702 fwrite(&apm16, sizeof(apm16), 1, fd); 703 704 /* Count total needed entries */ 705 total_parts = 2 + apm_partitions; /* Self + ISO9660 */ 706 707 /* Write self-descriptor */ 708 cd9660_write_apm_partition_entry(fd, 0, total_parts, 1, 709 total_parts, 512, "Apple", "Apple_partition_map"); 710 711 /* Write all partition entries */ 712 apm_partitions = 0; 713 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list) { 714 if (t->system != ET_SYS_MAC) 715 continue; 716 717 cd9660_write_apm_partition_entry(fd, 718 1 + apm_partitions++, total_parts, 719 t->sector * (diskStructure->sectorSize / 512), 720 t->num_sectors * (diskStructure->sectorSize / 512), 721 512, "CD Boot", "Apple_Bootstrap"); 722 } 723 724 /* Write ISO9660 descriptor, enclosing the whole disk */ 725 cd9660_write_apm_partition_entry(fd, 2 + apm_partitions, 726 total_parts, 0, diskStructure->totalSectors * 727 (diskStructure->sectorSize / 512), 512, "ISO9660", 728 "CD_ROM_Mode_1"); 729 } 730 731 return 0; 732 } 733