1 /* $NetBSD: cd9660_eltorito.c,v 1.17 2011/06/23 02:35:56 enami 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 #include "cd9660.h" 36 #include "cd9660_eltorito.h" 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #ifdef DEBUG 42 #define ELTORITO_DPRINTF(__x) printf __x 43 #else 44 #define ELTORITO_DPRINTF(__x) 45 #endif 46 47 static struct boot_catalog_entry *cd9660_init_boot_catalog_entry(void); 48 static struct boot_catalog_entry *cd9660_boot_setup_validation_entry(char); 49 static struct boot_catalog_entry *cd9660_boot_setup_default_entry( 50 struct cd9660_boot_image *); 51 static struct boot_catalog_entry *cd9660_boot_setup_section_head(char); 52 static struct boot_catalog_entry *cd9660_boot_setup_validation_entry(char); 53 #if 0 54 static u_char cd9660_boot_get_system_type(struct cd9660_boot_image *); 55 #endif 56 57 int 58 cd9660_add_boot_disk(iso9660_disk *diskStructure, const char *boot_info) 59 { 60 struct stat stbuf; 61 const char *mode_msg; 62 char *temp; 63 char *sysname; 64 char *filename; 65 struct cd9660_boot_image *new_image, *tmp_image; 66 67 assert(boot_info != NULL); 68 69 if (*boot_info == '\0') { 70 warnx("Error: Boot disk information must be in the " 71 "format 'system;filename'"); 72 return 0; 73 } 74 75 /* First decode the boot information */ 76 if ((temp = strdup(boot_info)) == NULL) { 77 warn("%s: strdup", __func__); 78 return 0; 79 } 80 81 sysname = temp; 82 filename = strchr(sysname, ';'); 83 if (filename == NULL) { 84 warnx("supply boot disk information in the format " 85 "'system;filename'"); 86 free(temp); 87 return 0; 88 } 89 90 *filename++ = '\0'; 91 92 if (diskStructure->verbose_level > 0) { 93 printf("Found bootdisk with system %s, and filename %s\n", 94 sysname, filename); 95 } 96 if ((new_image = malloc(sizeof(*new_image))) == NULL) { 97 warn("%s: malloc", __func__); 98 free(temp); 99 return 0; 100 } 101 (void)memset(new_image, 0, 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 if ((new_image->filename = strdup(filename)) == NULL) { 122 warn("%s: strdup", __func__); 123 free(temp); 124 free(new_image); 125 return 0; 126 } 127 128 free(temp); 129 130 /* Get information about the file */ 131 if (lstat(new_image->filename, &stbuf) == -1) 132 err(EXIT_FAILURE, "%s: lstat(\"%s\")", __func__, 133 new_image->filename); 134 135 switch (stbuf.st_size) { 136 case 1440 * 1024: 137 new_image->targetMode = ET_MEDIA_144FDD; 138 mode_msg = "Assigned boot image to 1.44 emulation mode"; 139 break; 140 case 1200 * 1024: 141 new_image->targetMode = ET_MEDIA_12FDD; 142 mode_msg = "Assigned boot image to 1.2 emulation mode"; 143 break; 144 case 2880 * 1024: 145 new_image->targetMode = ET_MEDIA_288FDD; 146 mode_msg = "Assigned boot image to 2.88 emulation mode"; 147 break; 148 default: 149 new_image->targetMode = ET_MEDIA_NOEM; 150 mode_msg = "Assigned boot image to no emulation mode"; 151 break; 152 } 153 154 if (diskStructure->verbose_level > 0) 155 printf("%s\n", mode_msg); 156 157 new_image->size = stbuf.st_size; 158 new_image->num_sectors = 159 howmany(new_image->size, diskStructure->sectorSize) * 160 howmany(diskStructure->sectorSize, 512); 161 if (diskStructure->verbose_level > 0) { 162 printf("New image has size %d, uses %d 512-byte sectors\n", 163 new_image->size, new_image->num_sectors); 164 } 165 new_image->sector = -1; 166 /* Bootable by default */ 167 new_image->bootable = ET_BOOTABLE; 168 /* Add boot disk */ 169 170 /* Group images for the same platform together. */ 171 TAILQ_FOREACH(tmp_image, &diskStructure->boot_images, image_list) { 172 if (tmp_image->system != new_image->system) 173 break; 174 } 175 176 if (tmp_image == NULL) { 177 TAILQ_INSERT_HEAD(&diskStructure->boot_images, new_image, 178 image_list); 179 } else 180 TAILQ_INSERT_BEFORE(tmp_image, new_image, image_list); 181 182 new_image->serialno = diskStructure->image_serialno++; 183 184 /* TODO : Need to do anything about the boot image in the tree? */ 185 diskStructure->is_bootable = 1; 186 187 return 1; 188 } 189 190 int 191 cd9660_eltorito_add_boot_option(iso9660_disk *diskStructure, 192 const char *option_string, const char *value) 193 { 194 char *eptr; 195 struct cd9660_boot_image *image; 196 197 assert(option_string != NULL); 198 199 /* Find the last image added */ 200 TAILQ_FOREACH(image, &diskStructure->boot_images, image_list) { 201 if (image->serialno + 1 == diskStructure->image_serialno) 202 break; 203 } 204 if (image == NULL) 205 errx(EXIT_FAILURE, "Attempted to add boot option, " 206 "but no boot images have been specified"); 207 208 if (strcmp(option_string, "no-emul-boot") == 0) { 209 image->targetMode = ET_MEDIA_NOEM; 210 } else if (strcmp(option_string, "no-boot") == 0) { 211 image->bootable = ET_NOT_BOOTABLE; 212 } else if (strcmp(option_string, "hard-disk-boot") == 0) { 213 image->targetMode = ET_MEDIA_HDD; 214 } else if (strcmp(option_string, "boot-load-segment") == 0) { 215 image->loadSegment = strtoul(value, &eptr, 16); 216 if (eptr == value || *eptr != '\0' || errno != ERANGE) { 217 warn("%s: strtoul", __func__); 218 return 0; 219 } 220 } else { 221 return 0; 222 } 223 return 1; 224 } 225 226 static struct boot_catalog_entry * 227 cd9660_init_boot_catalog_entry(void) 228 { 229 struct boot_catalog_entry *temp; 230 231 if ((temp = malloc(sizeof(*temp))) == NULL) 232 return NULL; 233 234 return memset(temp, 0, sizeof(*temp)); 235 } 236 237 static struct boot_catalog_entry * 238 cd9660_boot_setup_validation_entry(char sys) 239 { 240 struct boot_catalog_entry *entry; 241 boot_catalog_validation_entry *ve; 242 int16_t checksum; 243 unsigned char *csptr; 244 int i; 245 entry = cd9660_init_boot_catalog_entry(); 246 247 if (entry == NULL) { 248 warnx("Error: memory allocation failed in " 249 "cd9660_boot_setup_validation_entry"); 250 return 0; 251 } 252 ve = &entry->entry_data.VE; 253 254 ve->header_id[0] = 1; 255 ve->platform_id[0] = sys; 256 ve->key[0] = 0x55; 257 ve->key[1] = 0xAA; 258 259 /* Calculate checksum */ 260 checksum = 0; 261 cd9660_721(0, ve->checksum); 262 csptr = (unsigned char*)ve; 263 for (i = 0; i < sizeof(*ve); i += 2) { 264 checksum += (int16_t)csptr[i]; 265 checksum += 256 * (int16_t)csptr[i + 1]; 266 } 267 checksum = -checksum; 268 cd9660_721(checksum, ve->checksum); 269 270 ELTORITO_DPRINTF(("%s: header_id %d, platform_id %d, key[0] %d, key[1] %d, " 271 "checksum %04x\n", __func__, ve->header_id[0], ve->platform_id[0], 272 ve->key[0], ve->key[1], checksum)); 273 return entry; 274 } 275 276 static struct boot_catalog_entry * 277 cd9660_boot_setup_default_entry(struct cd9660_boot_image *disk) 278 { 279 struct boot_catalog_entry *default_entry; 280 boot_catalog_initial_entry *ie; 281 282 default_entry = cd9660_init_boot_catalog_entry(); 283 if (default_entry == NULL) 284 return NULL; 285 286 ie = &default_entry->entry_data.IE; 287 288 ie->boot_indicator[0] = disk->bootable; 289 ie->media_type[0] = disk->targetMode; 290 cd9660_721(disk->loadSegment, ie->load_segment); 291 ie->system_type[0] = disk->system; 292 cd9660_721(disk->num_sectors, ie->sector_count); 293 cd9660_731(disk->sector, ie->load_rba); 294 295 ELTORITO_DPRINTF(("%s: boot indicator %d, media type %d, " 296 "load segment %04x, system type %d, sector count %d, " 297 "load rba %d\n", __func__, ie->boot_indicator[0], 298 ie->media_type[0], disk->loadSegment, ie->system_type[0], 299 disk->num_sectors, disk->sector)); 300 return default_entry; 301 } 302 303 static struct boot_catalog_entry * 304 cd9660_boot_setup_section_head(char platform) 305 { 306 struct boot_catalog_entry *entry; 307 boot_catalog_section_header *sh; 308 309 entry = cd9660_init_boot_catalog_entry(); 310 if (entry == NULL) 311 return NULL; 312 313 sh = &entry->entry_data.SH; 314 /* More by default. The last one will manually be set to 0x91 */ 315 sh->header_indicator[0] = ET_SECTION_HEADER_MORE; 316 sh->platform_id[0] = platform; 317 sh->num_section_entries[0] = 0; 318 return entry; 319 } 320 321 static struct boot_catalog_entry * 322 cd9660_boot_setup_section_entry(struct cd9660_boot_image *disk) 323 { 324 struct boot_catalog_entry *entry; 325 boot_catalog_section_entry *se; 326 if ((entry = cd9660_init_boot_catalog_entry()) == NULL) 327 return NULL; 328 329 se = &entry->entry_data.SE; 330 331 se->boot_indicator[0] = ET_BOOTABLE; 332 se->media_type[0] = disk->targetMode; 333 cd9660_721(disk->loadSegment, se->load_segment); 334 cd9660_721(disk->num_sectors, se->sector_count); 335 cd9660_731(disk->sector, se->load_rba); 336 return entry; 337 } 338 339 #if 0 340 static u_char 341 cd9660_boot_get_system_type(struct cd9660_boot_image *disk) 342 { 343 /* 344 For hard drive booting, we need to examine the MBR to figure 345 out what the partition type is 346 */ 347 return 0; 348 } 349 #endif 350 351 /* 352 * Set up the BVD, Boot catalog, and the boot entries, but do no writing 353 */ 354 int 355 cd9660_setup_boot(iso9660_disk *diskStructure, int first_sector) 356 { 357 int sector; 358 int used_sectors; 359 int num_entries = 0; 360 int catalog_sectors; 361 struct boot_catalog_entry *x86_head, *mac_head, *ppc_head, 362 *valid_entry, *default_entry, *temp, *head, **headp, *next; 363 struct cd9660_boot_image *tmp_disk; 364 365 headp = NULL; 366 x86_head = mac_head = ppc_head = NULL; 367 368 /* If there are no boot disks, don't bother building boot information */ 369 if (TAILQ_EMPTY(&diskStructure->boot_images)) 370 return 0; 371 372 /* Point to catalog: For now assume it consumes one sector */ 373 ELTORITO_DPRINTF(("Boot catalog will go in sector %d\n", first_sector)); 374 diskStructure->boot_catalog_sector = first_sector; 375 cd9660_bothendian_dword(first_sector, 376 diskStructure->boot_descriptor->boot_catalog_pointer); 377 378 /* Step 1: Generate boot catalog */ 379 /* Step 1a: Validation entry */ 380 valid_entry = cd9660_boot_setup_validation_entry(ET_SYS_X86); 381 if (valid_entry == NULL) 382 return -1; 383 384 /* 385 * Count how many boot images there are, 386 * and how many sectors they consume. 387 */ 388 num_entries = 1; 389 used_sectors = 0; 390 391 TAILQ_FOREACH(tmp_disk, &diskStructure->boot_images, image_list) { 392 used_sectors += tmp_disk->num_sectors; 393 394 /* One default entry per image */ 395 num_entries++; 396 } 397 catalog_sectors = howmany(num_entries * 0x20, diskStructure->sectorSize); 398 used_sectors += catalog_sectors; 399 400 if (diskStructure->verbose_level > 0) { 401 printf("%s: there will be %i entries consuming %i sectors. " 402 "Catalog is %i sectors\n", __func__, num_entries, 403 used_sectors, catalog_sectors); 404 } 405 406 /* Populate sector numbers */ 407 sector = first_sector + catalog_sectors; 408 TAILQ_FOREACH(tmp_disk, &diskStructure->boot_images, image_list) { 409 tmp_disk->sector = sector; 410 sector += tmp_disk->num_sectors; 411 } 412 413 LIST_INSERT_HEAD(&diskStructure->boot_entries, valid_entry, ll_struct); 414 415 /* Step 1b: Initial/default entry */ 416 /* TODO : PARAM */ 417 tmp_disk = TAILQ_FIRST(&diskStructure->boot_images); 418 default_entry = cd9660_boot_setup_default_entry(tmp_disk); 419 if (default_entry == NULL) { 420 warnx("Error: memory allocation failed in cd9660_setup_boot"); 421 return -1; 422 } 423 424 LIST_INSERT_AFTER(valid_entry, default_entry, ll_struct); 425 426 /* Todo: multiple default entries? */ 427 428 tmp_disk = TAILQ_NEXT(tmp_disk, image_list); 429 430 temp = default_entry; 431 432 /* If multiple boot images are given : */ 433 while (tmp_disk != NULL) { 434 /* Step 2: Section header */ 435 switch (tmp_disk->system) { 436 case ET_SYS_X86: 437 headp = &x86_head; 438 break; 439 case ET_SYS_PPC: 440 headp = &ppc_head; 441 break; 442 case ET_SYS_MAC: 443 headp = &mac_head; 444 break; 445 default: 446 warnx("%s: internal error: unknown system type", 447 __func__); 448 return -1; 449 } 450 451 if (*headp == NULL) { 452 head = 453 cd9660_boot_setup_section_head(tmp_disk->system); 454 if (head == NULL) { 455 warnx("Error: memory allocation failed in " 456 "cd9660_setup_boot"); 457 return -1; 458 } 459 LIST_INSERT_AFTER(default_entry, head, ll_struct); 460 *headp = head; 461 } else 462 head = *headp; 463 464 head->entry_data.SH.num_section_entries[0]++; 465 466 /* Step 2a: Section entry and extensions */ 467 temp = cd9660_boot_setup_section_entry(tmp_disk); 468 if (temp == NULL) { 469 warn("%s: cd9660_boot_setup_section_entry", __func__); 470 return -1; 471 } 472 473 while ((next = LIST_NEXT(head, ll_struct)) != NULL && 474 next->entry_type == ET_ENTRY_SE) 475 head = next; 476 477 LIST_INSERT_AFTER(head, temp, ll_struct); 478 tmp_disk = TAILQ_NEXT(tmp_disk, image_list); 479 } 480 481 /* TODO: Remaining boot disks when implemented */ 482 483 return first_sector + used_sectors; 484 } 485 486 int 487 cd9660_setup_boot_volume_descriptor(iso9660_disk *diskStructure, 488 volume_descriptor *bvd) 489 { 490 boot_volume_descriptor *bvdData = 491 (boot_volume_descriptor*)bvd->volumeDescriptorData; 492 493 bvdData->boot_record_indicator[0] = ISO_VOLUME_DESCRIPTOR_BOOT; 494 memcpy(bvdData->identifier, ISO_VOLUME_DESCRIPTOR_STANDARD_ID, 5); 495 bvdData->version[0] = 1; 496 memcpy(bvdData->boot_system_identifier, ET_ID, 23); 497 memcpy(bvdData->identifier, ISO_VOLUME_DESCRIPTOR_STANDARD_ID, 5); 498 diskStructure->boot_descriptor = 499 (boot_volume_descriptor*) bvd->volumeDescriptorData; 500 return 1; 501 } 502 503 static int 504 cd9660_write_mbr_partition_entry(FILE *fd, int idx, off_t sector_start, 505 off_t nsectors, int type) 506 { 507 uint8_t val; 508 uint32_t lba; 509 510 if (fseeko(fd, (off_t)(idx) * 16 + 0x1be, SEEK_SET) == -1) 511 err(1, "fseeko"); 512 513 val = 0x80; /* Bootable */ 514 fwrite(&val, sizeof(val), 1, fd); 515 516 val = 0xff; /* CHS begin */ 517 fwrite(&val, sizeof(val), 1, fd); 518 fwrite(&val, sizeof(val), 1, fd); 519 fwrite(&val, sizeof(val), 1, fd); 520 521 val = type; /* Part type */ 522 fwrite(&val, sizeof(val), 1, fd); 523 524 val = 0xff; /* CHS end */ 525 fwrite(&val, sizeof(val), 1, fd); 526 fwrite(&val, sizeof(val), 1, fd); 527 fwrite(&val, sizeof(val), 1, fd); 528 529 /* LBA extent */ 530 lba = htole32(sector_start); 531 fwrite(&lba, sizeof(lba), 1, fd); 532 lba = htole32(nsectors); 533 fwrite(&lba, sizeof(lba), 1, fd); 534 535 return 0; 536 } 537 538 static int 539 cd9660_write_apm_partition_entry(FILE *fd, int idx, int total_partitions, 540 off_t sector_start, off_t nsectors, off_t sector_size, 541 const char *part_name, const char *part_type) 542 { 543 uint32_t apm32, part_status; 544 uint16_t apm16; 545 546 /* See Apple Tech Note 1189 for the details about the pmPartStatus 547 * flags. 548 * Below the flags which are default: 549 * - IsValid 0x01 550 * - IsAllocated 0x02 551 * - IsReadable 0x10 552 * - IsWritable 0x20 553 */ 554 part_status = 0x01 | 0x02 | 0x10 | 0x20; 555 556 if (fseeko(fd, (off_t)(idx + 1) * sector_size, SEEK_SET) == -1) 557 err(1, "fseeko"); 558 559 /* Signature */ 560 apm16 = htobe16(0x504d); 561 fwrite(&apm16, sizeof(apm16), 1, fd); 562 apm16 = 0; 563 fwrite(&apm16, sizeof(apm16), 1, fd); 564 565 /* Total number of partitions */ 566 apm32 = htobe32(total_partitions); 567 fwrite(&apm32, sizeof(apm32), 1, fd); 568 /* Bounds */ 569 apm32 = htobe32(sector_start); 570 fwrite(&apm32, sizeof(apm32), 1, fd); 571 apm32 = htobe32(nsectors); 572 fwrite(&apm32, sizeof(apm32), 1, fd); 573 574 fwrite(part_name, strlen(part_name) + 1, 1, fd); 575 fseek(fd, 32 - strlen(part_name) - 1, SEEK_CUR); 576 fwrite(part_type, strlen(part_type) + 1, 1, fd); 577 fseek(fd, 32 - strlen(part_type) - 1, SEEK_CUR); 578 579 apm32 = 0; 580 /* pmLgDataStart */ 581 fwrite(&apm32, sizeof(apm32), 1, fd); 582 /* pmDataCnt */ 583 apm32 = htobe32(nsectors); 584 fwrite(&apm32, sizeof(apm32), 1, fd); 585 /* pmPartStatus */ 586 apm32 = htobe32(part_status); 587 fwrite(&apm32, sizeof(apm32), 1, fd); 588 589 return 0; 590 } 591 592 int 593 cd9660_write_boot(iso9660_disk *diskStructure, FILE *fd) 594 { 595 struct boot_catalog_entry *e; 596 struct cd9660_boot_image *t; 597 int apm_partitions = 0; 598 int mbr_partitions = 0; 599 600 /* write boot catalog */ 601 if (fseeko(fd, (off_t)diskStructure->boot_catalog_sector * 602 diskStructure->sectorSize, SEEK_SET) == -1) 603 err(1, "fseeko"); 604 605 if (diskStructure->verbose_level > 0) { 606 printf("Writing boot catalog to sector %" PRId64 "\n", 607 diskStructure->boot_catalog_sector); 608 } 609 LIST_FOREACH(e, &diskStructure->boot_entries, ll_struct) { 610 if (diskStructure->verbose_level > 0) { 611 printf("Writing catalog entry of type %d\n", 612 e->entry_type); 613 } 614 /* 615 * It doesn't matter which one gets written 616 * since they are the same size 617 */ 618 fwrite(&(e->entry_data.VE), 1, 32, fd); 619 } 620 if (diskStructure->verbose_level > 0) 621 printf("Finished writing boot catalog\n"); 622 623 /* copy boot images */ 624 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list) { 625 if (diskStructure->verbose_level > 0) { 626 printf("Writing boot image from %s to sectors %d\n", 627 t->filename, t->sector); 628 } 629 cd9660_copy_file(diskStructure, fd, t->sector, t->filename); 630 631 if (t->system == ET_SYS_MAC) 632 apm_partitions++; 633 if (t->system == ET_SYS_PPC) 634 mbr_partitions++; 635 } 636 637 /* some systems need partition tables as well */ 638 if (mbr_partitions > 0 || diskStructure->chrp_boot) { 639 uint16_t sig; 640 641 fseek(fd, 0x1fe, SEEK_SET); 642 sig = htole16(0xaa55); 643 fwrite(&sig, sizeof(sig), 1, fd); 644 645 mbr_partitions = 0; 646 647 /* Write ISO9660 descriptor, enclosing the whole disk */ 648 if (diskStructure->chrp_boot) 649 cd9660_write_mbr_partition_entry(fd, mbr_partitions++, 650 0, diskStructure->totalSectors * 651 (diskStructure->sectorSize / 512), 0x96); 652 653 /* Write all partition entries */ 654 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list) { 655 if (t->system != ET_SYS_PPC) 656 continue; 657 cd9660_write_mbr_partition_entry(fd, mbr_partitions++, 658 t->sector * (diskStructure->sectorSize / 512), 659 t->num_sectors * (diskStructure->sectorSize / 512), 660 0x41 /* PReP Boot */); 661 } 662 } 663 664 if (apm_partitions > 0) { 665 /* Write DDR and global APM info */ 666 uint32_t apm32; 667 uint16_t apm16; 668 int total_parts; 669 670 fseek(fd, 0, SEEK_SET); 671 apm16 = htobe16(0x4552); 672 fwrite(&apm16, sizeof(apm16), 1, fd); 673 /* Device block size */ 674 apm16 = htobe16(512); 675 fwrite(&apm16, sizeof(apm16), 1, fd); 676 /* Device block count */ 677 apm32 = htobe32(diskStructure->totalSectors * 678 (diskStructure->sectorSize / 512)); 679 fwrite(&apm32, sizeof(apm32), 1, fd); 680 /* Device type/id */ 681 apm16 = htobe16(1); 682 fwrite(&apm16, sizeof(apm16), 1, fd); 683 fwrite(&apm16, sizeof(apm16), 1, fd); 684 685 /* Count total needed entries */ 686 total_parts = 2 + apm_partitions; /* Self + ISO9660 */ 687 688 /* Write self-descriptor */ 689 cd9660_write_apm_partition_entry(fd, 0, total_parts, 1, 690 total_parts, 512, "Apple", "Apple_partition_map"); 691 692 /* Write all partition entries */ 693 apm_partitions = 0; 694 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list) { 695 if (t->system != ET_SYS_MAC) 696 continue; 697 698 cd9660_write_apm_partition_entry(fd, 699 1 + apm_partitions++, total_parts, 700 t->sector * (diskStructure->sectorSize / 512), 701 t->num_sectors * (diskStructure->sectorSize / 512), 702 512, "CD Boot", "Apple_Bootstrap"); 703 } 704 /* Write ISO9660 descriptor, enclosing the whole disk */ 705 cd9660_write_apm_partition_entry(fd, 2 + apm_partitions, 706 total_parts, 0, diskStructure->totalSectors * 707 (diskStructure->sectorSize / 512), 512, "ISO9660", 708 "CD_ROM_Mode_1"); 709 } 710 711 return 0; 712 } 713 714