1/*- 2 * Copyright (c) 1998 Robert Nordier 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are freely 6 * permitted provided that the above copyright notice and this 7 * paragraph and the following disclaimer are duplicated in all 8 * such forms. 9 * 10 * This software is provided "AS IS" and without any express or 11 * implied warranties, including, without limitation, the implied 12 * warranties of merchantability and fitness for a particular 13 * purpose. 14 */ 15 16#include <sys/cdefs.h> 17__FBSDID("$FreeBSD: stable/10/sys/boot/i386/zfsboot/zfsboot.c 308915 2016-11-21 10:14:36Z avg $"); 18 19#include <sys/param.h> 20#include <sys/errno.h> 21#include <sys/diskmbr.h> 22#ifdef GPT 23#include <sys/gpt.h> 24#endif 25#include <sys/reboot.h> 26#include <sys/queue.h> 27 28#include <machine/bootinfo.h> 29#include <machine/elf.h> 30#include <machine/pc/bios.h> 31 32#include <stdarg.h> 33#include <stddef.h> 34 35#include <a.out.h> 36 37#include <btxv86.h> 38 39#include "lib.h" 40#include "rbx.h" 41#include "drv.h" 42#include "util.h" 43#include "cons.h" 44#include "bootargs.h" 45#include "paths.h" 46 47#include "libzfs.h" 48 49#define ARGS 0x900 50#define NOPT 14 51#define NDEV 3 52 53#define BIOS_NUMDRIVES 0x475 54#define DRV_HARD 0x80 55#define DRV_MASK 0x7f 56 57#define TYPE_AD 0 58#define TYPE_DA 1 59#define TYPE_MAXHARD TYPE_DA 60#define TYPE_FD 2 61 62extern uint32_t _end; 63 64#ifdef GPT 65static const uuid_t freebsd_zfs_uuid = GPT_ENT_TYPE_FREEBSD_ZFS; 66#endif 67static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */ 68static const unsigned char flags[NOPT] = { 69 RBX_DUAL, 70 RBX_SERIAL, 71 RBX_ASKNAME, 72 RBX_CDROM, 73 RBX_CONFIG, 74 RBX_KDB, 75 RBX_GDB, 76 RBX_MUTE, 77 RBX_NOINTR, 78 RBX_PAUSE, 79 RBX_QUIET, 80 RBX_DFLTROOT, 81 RBX_SINGLE, 82 RBX_VERBOSE 83}; 84uint32_t opts; 85 86static const unsigned char dev_maj[NDEV] = {30, 4, 2}; 87 88static char cmd[512]; 89static char cmddup[512]; 90static char kname[1024]; 91static char rootname[256]; 92static int comspeed = SIOSPD; 93static struct bootinfo bootinfo; 94static uint32_t bootdev; 95static struct zfs_boot_args zfsargs; 96static struct zfsmount zfsmount; 97 98vm_offset_t high_heap_base; 99uint32_t bios_basemem, bios_extmem, high_heap_size; 100 101static struct bios_smap smap; 102 103/* 104 * The minimum amount of memory to reserve in bios_extmem for the heap. 105 */ 106#define HEAP_MIN (3 * 1024 * 1024) 107 108static char *heap_next; 109static char *heap_end; 110 111/* Buffers that must not span a 64k boundary. */ 112#define READ_BUF_SIZE 8192 113struct dmadat { 114 char rdbuf[READ_BUF_SIZE]; /* for reading large things */ 115 char secbuf[READ_BUF_SIZE]; /* for MBR/disklabel */ 116}; 117static struct dmadat *dmadat; 118 119void exit(int); 120void reboot(void); 121static void load(void); 122static int parse(void); 123static void bios_getmem(void); 124 125static void * 126malloc(size_t n) 127{ 128 char *p = heap_next; 129 if (p + n > heap_end) { 130 printf("malloc failure\n"); 131 for (;;) 132 ; 133 return 0; 134 } 135 heap_next += n; 136 return p; 137} 138 139static char * 140strdup(const char *s) 141{ 142 char *p = malloc(strlen(s) + 1); 143 strcpy(p, s); 144 return p; 145} 146 147#include "zfsimpl.c" 148 149/* 150 * Read from a dnode (which must be from a ZPL filesystem). 151 */ 152static int 153zfs_read(spa_t *spa, const dnode_phys_t *dnode, off_t *offp, void *start, size_t size) 154{ 155 const znode_phys_t *zp = (const znode_phys_t *) dnode->dn_bonus; 156 size_t n; 157 int rc; 158 159 n = size; 160 if (*offp + n > zp->zp_size) 161 n = zp->zp_size - *offp; 162 163 rc = dnode_read(spa, dnode, *offp, start, n); 164 if (rc) 165 return (-1); 166 *offp += n; 167 168 return (n); 169} 170 171/* 172 * Current ZFS pool 173 */ 174static spa_t *spa; 175static spa_t *primary_spa; 176static vdev_t *primary_vdev; 177 178/* 179 * A wrapper for dskread that doesn't have to worry about whether the 180 * buffer pointer crosses a 64k boundary. 181 */ 182static int 183vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) 184{ 185 char *p; 186 daddr_t lba; 187 unsigned int nb; 188 struct dsk *dsk = (struct dsk *) priv; 189 190 if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1))) 191 return -1; 192 193 p = buf; 194 lba = off / DEV_BSIZE; 195 lba += dsk->start; 196 while (bytes > 0) { 197 nb = bytes / DEV_BSIZE; 198 if (nb > READ_BUF_SIZE / DEV_BSIZE) 199 nb = READ_BUF_SIZE / DEV_BSIZE; 200 if (drvread(dsk, dmadat->rdbuf, lba, nb)) 201 return -1; 202 memcpy(p, dmadat->rdbuf, nb * DEV_BSIZE); 203 p += nb * DEV_BSIZE; 204 lba += nb; 205 bytes -= nb * DEV_BSIZE; 206 } 207 208 return 0; 209} 210 211static int 212vdev_write(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) 213{ 214 char *p; 215 daddr_t lba; 216 unsigned int nb; 217 struct dsk *dsk = (struct dsk *) priv; 218 219 if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1))) 220 return -1; 221 222 p = buf; 223 lba = off / DEV_BSIZE; 224 lba += dsk->start; 225 while (bytes > 0) { 226 nb = bytes / DEV_BSIZE; 227 if (nb > READ_BUF_SIZE / DEV_BSIZE) 228 nb = READ_BUF_SIZE / DEV_BSIZE; 229 memcpy(dmadat->rdbuf, p, nb * DEV_BSIZE); 230 if (drvwrite(dsk, dmadat->rdbuf, lba, nb)) 231 return -1; 232 p += nb * DEV_BSIZE; 233 lba += nb; 234 bytes -= nb * DEV_BSIZE; 235 } 236 237 return 0; 238} 239 240static int 241xfsread(const dnode_phys_t *dnode, off_t *offp, void *buf, size_t nbyte) 242{ 243 if ((size_t)zfs_read(spa, dnode, offp, buf, nbyte) != nbyte) { 244 printf("Invalid format\n"); 245 return -1; 246 } 247 return 0; 248} 249 250/* 251 * Read Pad2 (formerly "Boot Block Header") area of the first 252 * vdev label of the given vdev. 253 */ 254static int 255vdev_read_pad2(vdev_t *vdev, char *buf, size_t size) 256{ 257 blkptr_t bp; 258 char *tmp = zap_scratch; 259 off_t off = offsetof(vdev_label_t, vl_pad2); 260 261 if (size > VDEV_PAD_SIZE) 262 size = VDEV_PAD_SIZE; 263 264 BP_ZERO(&bp); 265 BP_SET_LSIZE(&bp, VDEV_PAD_SIZE); 266 BP_SET_PSIZE(&bp, VDEV_PAD_SIZE); 267 BP_SET_CHECKSUM(&bp, ZIO_CHECKSUM_LABEL); 268 BP_SET_COMPRESS(&bp, ZIO_COMPRESS_OFF); 269 DVA_SET_OFFSET(BP_IDENTITY(&bp), off); 270 if (vdev_read_phys(vdev, &bp, tmp, off, 0)) 271 return (EIO); 272 memcpy(buf, tmp, size); 273 return (0); 274} 275 276static int 277vdev_clear_pad2(vdev_t *vdev) 278{ 279 char *zeroes = zap_scratch; 280 uint64_t *end; 281 off_t off = offsetof(vdev_label_t, vl_pad2); 282 283 memset(zeroes, 0, VDEV_PAD_SIZE); 284 end = (uint64_t *)(zeroes + VDEV_PAD_SIZE); 285 /* ZIO_CHECKSUM_LABEL magic and pre-calcualted checksum for all zeros */ 286 end[-5] = 0x0210da7ab10c7a11; 287 end[-4] = 0x97f48f807f6e2a3f; 288 end[-3] = 0xaf909f1658aacefc; 289 end[-2] = 0xcbd1ea57ff6db48b; 290 end[-1] = 0x6ec692db0d465fab; 291 if (vdev_write(vdev, vdev->v_read_priv, off, zeroes, VDEV_PAD_SIZE)) 292 return (EIO); 293 return (0); 294} 295 296static void 297bios_getmem(void) 298{ 299 uint64_t size; 300 301 /* Parse system memory map */ 302 v86.ebx = 0; 303 do { 304 v86.ctl = V86_FLAGS; 305 v86.addr = 0x15; /* int 0x15 function 0xe820*/ 306 v86.eax = 0xe820; 307 v86.ecx = sizeof(struct bios_smap); 308 v86.edx = SMAP_SIG; 309 v86.es = VTOPSEG(&smap); 310 v86.edi = VTOPOFF(&smap); 311 v86int(); 312 if (V86_CY(v86.efl) || (v86.eax != SMAP_SIG)) 313 break; 314 /* look for a low-memory segment that's large enough */ 315 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) && 316 (smap.length >= (512 * 1024))) 317 bios_basemem = smap.length; 318 /* look for the first segment in 'extended' memory */ 319 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) { 320 bios_extmem = smap.length; 321 } 322 323 /* 324 * Look for the largest segment in 'extended' memory beyond 325 * 1MB but below 4GB. 326 */ 327 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) && 328 (smap.base < 0x100000000ull)) { 329 size = smap.length; 330 331 /* 332 * If this segment crosses the 4GB boundary, truncate it. 333 */ 334 if (smap.base + size > 0x100000000ull) 335 size = 0x100000000ull - smap.base; 336 337 if (size > high_heap_size) { 338 high_heap_size = size; 339 high_heap_base = smap.base; 340 } 341 } 342 } while (v86.ebx != 0); 343 344 /* Fall back to the old compatibility function for base memory */ 345 if (bios_basemem == 0) { 346 v86.ctl = 0; 347 v86.addr = 0x12; /* int 0x12 */ 348 v86int(); 349 350 bios_basemem = (v86.eax & 0xffff) * 1024; 351 } 352 353 /* Fall back through several compatibility functions for extended memory */ 354 if (bios_extmem == 0) { 355 v86.ctl = V86_FLAGS; 356 v86.addr = 0x15; /* int 0x15 function 0xe801*/ 357 v86.eax = 0xe801; 358 v86int(); 359 if (!V86_CY(v86.efl)) { 360 bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024; 361 } 362 } 363 if (bios_extmem == 0) { 364 v86.ctl = 0; 365 v86.addr = 0x15; /* int 0x15 function 0x88*/ 366 v86.eax = 0x8800; 367 v86int(); 368 bios_extmem = (v86.eax & 0xffff) * 1024; 369 } 370 371 /* 372 * If we have extended memory and did not find a suitable heap 373 * region in the SMAP, use the last 3MB of 'extended' memory as a 374 * high heap candidate. 375 */ 376 if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) { 377 high_heap_size = HEAP_MIN; 378 high_heap_base = bios_extmem + 0x100000 - HEAP_MIN; 379 } 380} 381 382/* 383 * Try to detect a device supported by the legacy int13 BIOS 384 */ 385static int 386int13probe(int drive) 387{ 388 v86.ctl = V86_FLAGS; 389 v86.addr = 0x13; 390 v86.eax = 0x800; 391 v86.edx = drive; 392 v86int(); 393 394 if (!V86_CY(v86.efl) && /* carry clear */ 395 ((v86.edx & 0xff) != (drive & DRV_MASK))) { /* unit # OK */ 396 if ((v86.ecx & 0x3f) == 0) { /* absurd sector size */ 397 return(0); /* skip device */ 398 } 399 return (1); 400 } 401 return(0); 402} 403 404/* 405 * We call this when we find a ZFS vdev - ZFS consumes the dsk 406 * structure so we must make a new one. 407 */ 408static struct dsk * 409copy_dsk(struct dsk *dsk) 410{ 411 struct dsk *newdsk; 412 413 newdsk = malloc(sizeof(struct dsk)); 414 *newdsk = *dsk; 415 return (newdsk); 416} 417 418static void 419probe_drive(struct dsk *dsk) 420{ 421#ifdef GPT 422 struct gpt_hdr hdr; 423 struct gpt_ent *ent; 424 daddr_t slba, elba; 425 unsigned part, entries_per_sec; 426#endif 427 struct dos_partition *dp; 428 char *sec; 429 unsigned i; 430 431 /* 432 * If we find a vdev on the whole disk, stop here. Otherwise dig 433 * out the partition table and probe each slice/partition 434 * in turn for a vdev. 435 */ 436 if (vdev_probe(vdev_read, dsk, NULL) == 0) 437 return; 438 439 sec = dmadat->secbuf; 440 dsk->start = 0; 441 442#ifdef GPT 443 /* 444 * First check for GPT. 445 */ 446 if (drvread(dsk, sec, 1, 1)) { 447 return; 448 } 449 memcpy(&hdr, sec, sizeof(hdr)); 450 if (memcmp(hdr.hdr_sig, GPT_HDR_SIG, sizeof(hdr.hdr_sig)) != 0 || 451 hdr.hdr_lba_self != 1 || hdr.hdr_revision < 0x00010000 || 452 hdr.hdr_entsz < sizeof(*ent) || DEV_BSIZE % hdr.hdr_entsz != 0) { 453 goto trymbr; 454 } 455 456 /* 457 * Probe all GPT partitions for the presense of ZFS pools. We 458 * return the spa_t for the first we find (if requested). This 459 * will have the effect of booting from the first pool on the 460 * disk. 461 */ 462 entries_per_sec = DEV_BSIZE / hdr.hdr_entsz; 463 slba = hdr.hdr_lba_table; 464 elba = slba + hdr.hdr_entries / entries_per_sec; 465 while (slba < elba) { 466 dsk->start = 0; 467 if (drvread(dsk, sec, slba, 1)) 468 return; 469 for (part = 0; part < entries_per_sec; part++) { 470 ent = (struct gpt_ent *)(sec + part * hdr.hdr_entsz); 471 if (memcmp(&ent->ent_type, &freebsd_zfs_uuid, 472 sizeof(uuid_t)) == 0) { 473 dsk->start = ent->ent_lba_start; 474 if (vdev_probe(vdev_read, dsk, NULL) == 0) { 475 /* 476 * This slice had a vdev. We need a new dsk 477 * structure now since the vdev now owns this one. 478 */ 479 dsk = copy_dsk(dsk); 480 } 481 } 482 } 483 slba++; 484 } 485 return; 486trymbr: 487#endif 488 489 if (drvread(dsk, sec, DOSBBSECTOR, 1)) 490 return; 491 dp = (void *)(sec + DOSPARTOFF); 492 493 for (i = 0; i < NDOSPART; i++) { 494 if (!dp[i].dp_typ) 495 continue; 496 dsk->start = dp[i].dp_start; 497 if (vdev_probe(vdev_read, dsk, NULL) == 0) { 498 /* 499 * This slice had a vdev. We need a new dsk structure now 500 * since the vdev now owns this one. 501 */ 502 dsk = copy_dsk(dsk); 503 } 504 } 505} 506 507int 508main(void) 509{ 510 dnode_phys_t dn; 511 off_t off; 512 struct dsk *dsk; 513 int autoboot, i; 514 int nextboot; 515 int rc; 516 517 dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base); 518 519 bios_getmem(); 520 521 if (high_heap_size > 0) { 522 heap_end = PTOV(high_heap_base + high_heap_size); 523 heap_next = PTOV(high_heap_base); 524 } else { 525 heap_next = (char *) dmadat + sizeof(*dmadat); 526 heap_end = (char *) PTOV(bios_basemem); 527 } 528 529 dsk = malloc(sizeof(struct dsk)); 530 dsk->drive = *(uint8_t *)PTOV(ARGS); 531 dsk->type = dsk->drive & DRV_HARD ? TYPE_AD : TYPE_FD; 532 dsk->unit = dsk->drive & DRV_MASK; 533 dsk->slice = *(uint8_t *)PTOV(ARGS + 1) + 1; 534 dsk->part = 0; 535 dsk->start = 0; 536 dsk->init = 0; 537 538 bootinfo.bi_version = BOOTINFO_VERSION; 539 bootinfo.bi_size = sizeof(bootinfo); 540 bootinfo.bi_basemem = bios_basemem / 1024; 541 bootinfo.bi_extmem = bios_extmem / 1024; 542 bootinfo.bi_memsizes_valid++; 543 bootinfo.bi_bios_dev = dsk->drive; 544 545 bootdev = MAKEBOOTDEV(dev_maj[dsk->type], 546 dsk->slice, dsk->unit, dsk->part); 547 548 /* Process configuration file */ 549 550 autoboot = 1; 551 552 zfs_init(); 553 554 /* 555 * Probe the boot drive first - we will try to boot from whatever 556 * pool we find on that drive. 557 */ 558 probe_drive(dsk); 559 560 /* 561 * Probe the rest of the drives that the bios knows about. This 562 * will find any other available pools and it may fill in missing 563 * vdevs for the boot pool. 564 */ 565#ifndef VIRTUALBOX 566 for (i = 0; i < *(unsigned char *)PTOV(BIOS_NUMDRIVES); i++) 567#else 568 for (i = 0; i < MAXBDDEV; i++) 569#endif 570 { 571 if ((i | DRV_HARD) == *(uint8_t *)PTOV(ARGS)) 572 continue; 573 574 if (!int13probe(i | DRV_HARD)) 575 break; 576 577 dsk = malloc(sizeof(struct dsk)); 578 dsk->drive = i | DRV_HARD; 579 dsk->type = dsk->drive & TYPE_AD; 580 dsk->unit = i; 581 dsk->slice = 0; 582 dsk->part = 0; 583 dsk->start = 0; 584 dsk->init = 0; 585 probe_drive(dsk); 586 } 587 588 /* 589 * The first discovered pool, if any, is the pool. 590 */ 591 spa = spa_get_primary(); 592 if (!spa) { 593 printf("%s: No ZFS pools located, can't boot\n", BOOTPROG); 594 for (;;) 595 ; 596 } 597 598 primary_spa = spa; 599 primary_vdev = spa_get_primary_vdev(spa); 600 601 nextboot = 0; 602 rc = vdev_read_pad2(primary_vdev, cmd, sizeof(cmd)); 603 if (vdev_clear_pad2(primary_vdev)) 604 printf("failed to clear pad2 area of primary vdev\n"); 605 if (rc == 0) { 606 if (*cmd) { 607 /* 608 * We could find an old-style ZFS Boot Block header here. 609 * Simply ignore it. 610 */ 611 if (*(uint64_t *)cmd != 0x2f5b007b10c) { 612 /* 613 * Note that parse() is destructive to cmd[] and we also want 614 * to honor RBX_QUIET option that could be present in cmd[]. 615 */ 616 nextboot = 1; 617 memcpy(cmddup, cmd, sizeof(cmd)); 618 if (parse()) { 619 printf("failed to parse pad2 area of primary vdev\n"); 620 reboot(); 621 } 622 if (!OPT_CHECK(RBX_QUIET)) 623 printf("zfs nextboot: %s\n", cmddup); 624 } 625 /* Do not process this command twice */ 626 *cmd = 0; 627 } 628 } else 629 printf("failed to read pad2 area of primary vdev\n"); 630 631 /* Mount ZFS only if it's not already mounted via nextboot parsing. */ 632 if (zfsmount.spa == NULL && 633 (zfs_spa_init(spa) != 0 || zfs_mount(spa, 0, &zfsmount) != 0)) { 634 printf("%s: failed to mount default pool %s\n", 635 BOOTPROG, spa->spa_name); 636 autoboot = 0; 637 } else if (zfs_lookup(&zfsmount, PATH_CONFIG, &dn) == 0 || 638 zfs_lookup(&zfsmount, PATH_DOTCONFIG, &dn) == 0) { 639 off = 0; 640 zfs_read(spa, &dn, &off, cmd, sizeof(cmd)); 641 } 642 643 if (*cmd) { 644 /* 645 * Note that parse() is destructive to cmd[] and we also want 646 * to honor RBX_QUIET option that could be present in cmd[]. 647 */ 648 memcpy(cmddup, cmd, sizeof(cmd)); 649 if (parse()) 650 autoboot = 0; 651 if (!OPT_CHECK(RBX_QUIET)) 652 printf("%s: %s\n", PATH_CONFIG, cmddup); 653 /* Do not process this command twice */ 654 *cmd = 0; 655 } 656 657 /* Do not risk waiting at the prompt forever. */ 658 if (nextboot && !autoboot) 659 reboot(); 660 661 /* 662 * Try to exec /boot/loader. If interrupted by a keypress, 663 * or in case of failure, try to load a kernel directly instead. 664 */ 665 666 if (autoboot && !*kname) { 667 memcpy(kname, PATH_LOADER_ZFS, sizeof(PATH_LOADER_ZFS)); 668 if (!keyhit(3)) { 669 load(); 670 memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL)); 671 } 672 } 673 674 /* Present the user with the boot2 prompt. */ 675 676 for (;;) { 677 if (!autoboot || !OPT_CHECK(RBX_QUIET)) { 678 printf("\nFreeBSD/x86 boot\n"); 679 if (zfs_rlookup(spa, zfsmount.rootobj, rootname) != 0) 680 printf("Default: %s/<0x%llx>:%s\n" 681 "boot: ", 682 spa->spa_name, zfsmount.rootobj, kname); 683 else if (rootname[0] != '\0') 684 printf("Default: %s/%s:%s\n" 685 "boot: ", 686 spa->spa_name, rootname, kname); 687 else 688 printf("Default: %s:%s\n" 689 "boot: ", 690 spa->spa_name, kname); 691 } 692 if (ioctrl & IO_SERIAL) 693 sio_flush(); 694 if (!autoboot || keyhit(5)) 695 getstr(cmd, sizeof(cmd)); 696 else if (!autoboot || !OPT_CHECK(RBX_QUIET)) 697 putchar('\n'); 698 autoboot = 0; 699 if (parse()) 700 putchar('\a'); 701 else 702 load(); 703 } 704} 705 706/* XXX - Needed for btxld to link the boot2 binary; do not remove. */ 707void 708exit(int x) 709{ 710 __exit(x); 711} 712 713void 714reboot(void) 715{ 716 __exit(0); 717} 718 719static void 720load(void) 721{ 722 union { 723 struct exec ex; 724 Elf32_Ehdr eh; 725 } hdr; 726 static Elf32_Phdr ep[2]; 727 static Elf32_Shdr es[2]; 728 caddr_t p; 729 dnode_phys_t dn; 730 off_t off; 731 uint32_t addr, x; 732 int fmt, i, j; 733 734 if (zfs_lookup(&zfsmount, kname, &dn)) { 735 printf("\nCan't find %s\n", kname); 736 return; 737 } 738 off = 0; 739 if (xfsread(&dn, &off, &hdr, sizeof(hdr))) 740 return; 741 if (N_GETMAGIC(hdr.ex) == ZMAGIC) 742 fmt = 0; 743 else if (IS_ELF(hdr.eh)) 744 fmt = 1; 745 else { 746 printf("Invalid %s\n", "format"); 747 return; 748 } 749 if (fmt == 0) { 750 addr = hdr.ex.a_entry & 0xffffff; 751 p = PTOV(addr); 752 off = PAGE_SIZE; 753 if (xfsread(&dn, &off, p, hdr.ex.a_text)) 754 return; 755 p += roundup2(hdr.ex.a_text, PAGE_SIZE); 756 if (xfsread(&dn, &off, p, hdr.ex.a_data)) 757 return; 758 p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE); 759 bootinfo.bi_symtab = VTOP(p); 760 memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms)); 761 p += sizeof(hdr.ex.a_syms); 762 if (hdr.ex.a_syms) { 763 if (xfsread(&dn, &off, p, hdr.ex.a_syms)) 764 return; 765 p += hdr.ex.a_syms; 766 if (xfsread(&dn, &off, p, sizeof(int))) 767 return; 768 x = *(uint32_t *)p; 769 p += sizeof(int); 770 x -= sizeof(int); 771 if (xfsread(&dn, &off, p, x)) 772 return; 773 p += x; 774 } 775 } else { 776 off = hdr.eh.e_phoff; 777 for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) { 778 if (xfsread(&dn, &off, ep + j, sizeof(ep[0]))) 779 return; 780 if (ep[j].p_type == PT_LOAD) 781 j++; 782 } 783 for (i = 0; i < 2; i++) { 784 p = PTOV(ep[i].p_paddr & 0xffffff); 785 off = ep[i].p_offset; 786 if (xfsread(&dn, &off, p, ep[i].p_filesz)) 787 return; 788 } 789 p += roundup2(ep[1].p_memsz, PAGE_SIZE); 790 bootinfo.bi_symtab = VTOP(p); 791 if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) { 792 off = hdr.eh.e_shoff + sizeof(es[0]) * 793 (hdr.eh.e_shstrndx + 1); 794 if (xfsread(&dn, &off, &es, sizeof(es))) 795 return; 796 for (i = 0; i < 2; i++) { 797 memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size)); 798 p += sizeof(es[i].sh_size); 799 off = es[i].sh_offset; 800 if (xfsread(&dn, &off, p, es[i].sh_size)) 801 return; 802 p += es[i].sh_size; 803 } 804 } 805 addr = hdr.eh.e_entry & 0xffffff; 806 } 807 bootinfo.bi_esymtab = VTOP(p); 808 bootinfo.bi_kernelname = VTOP(kname); 809 zfsargs.size = sizeof(zfsargs); 810 zfsargs.pool = zfsmount.spa->spa_guid; 811 zfsargs.root = zfsmount.rootobj; 812 zfsargs.primary_pool = primary_spa->spa_guid; 813 if (primary_vdev != NULL) 814 zfsargs.primary_vdev = primary_vdev->v_guid; 815 else 816 printf("failed to detect primary vdev\n"); 817 __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK), 818 bootdev, 819 KARGS_FLAGS_ZFS | KARGS_FLAGS_EXTARG, 820 (uint32_t) spa->spa_guid, 821 (uint32_t) (spa->spa_guid >> 32), 822 VTOP(&bootinfo), 823 zfsargs); 824} 825 826static int 827zfs_mount_ds(char *dsname) 828{ 829 uint64_t newroot; 830 spa_t *newspa; 831 char *q; 832 833 q = strchr(dsname, '/'); 834 if (q) 835 *q++ = '\0'; 836 newspa = spa_find_by_name(dsname); 837 if (newspa == NULL) { 838 printf("\nCan't find ZFS pool %s\n", dsname); 839 return -1; 840 } 841 842 if (zfs_spa_init(newspa)) 843 return -1; 844 845 newroot = 0; 846 if (q) { 847 if (zfs_lookup_dataset(newspa, q, &newroot)) { 848 printf("\nCan't find dataset %s in ZFS pool %s\n", 849 q, newspa->spa_name); 850 return -1; 851 } 852 } 853 if (zfs_mount(newspa, newroot, &zfsmount)) { 854 printf("\nCan't mount ZFS dataset\n"); 855 return -1; 856 } 857 spa = newspa; 858 return (0); 859} 860 861static int 862parse(void) 863{ 864 char *arg = cmd; 865 char *ep, *p, *q; 866 const char *cp; 867 int c, i, j; 868 869 while ((c = *arg++)) { 870 if (c == ' ' || c == '\t' || c == '\n') 871 continue; 872 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++); 873 ep = p; 874 if (*p) 875 *p++ = 0; 876 if (c == '-') { 877 while ((c = *arg++)) { 878 if (c == 'P') { 879 if (*(uint8_t *)PTOV(0x496) & 0x10) { 880 cp = "yes"; 881 } else { 882 opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL); 883 cp = "no"; 884 } 885 printf("Keyboard: %s\n", cp); 886 continue; 887 } else if (c == 'S') { 888 j = 0; 889 while ((unsigned int)(i = *arg++ - '0') <= 9) 890 j = j * 10 + i; 891 if (j > 0 && i == -'0') { 892 comspeed = j; 893 break; 894 } 895 /* Fall through to error below ('S' not in optstr[]). */ 896 } 897 for (i = 0; c != optstr[i]; i++) 898 if (i == NOPT - 1) 899 return -1; 900 opts ^= OPT_SET(flags[i]); 901 } 902 ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) : 903 OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD; 904 if (ioctrl & IO_SERIAL) { 905 if (sio_init(115200 / comspeed) != 0) 906 ioctrl &= ~IO_SERIAL; 907 } 908 } if (c == '?') { 909 dnode_phys_t dn; 910 911 if (zfs_lookup(&zfsmount, arg, &dn) == 0) { 912 zap_list(spa, &dn); 913 } 914 return -1; 915 } else { 916 arg--; 917 918 /* 919 * Report pool status if the comment is 'status'. Lets 920 * hope no-one wants to load /status as a kernel. 921 */ 922 if (!strcmp(arg, "status")) { 923 spa_all_status(); 924 return -1; 925 } 926 927 /* 928 * If there is "zfs:" prefix simply ignore it. 929 */ 930 if (strncmp(arg, "zfs:", 4) == 0) 931 arg += 4; 932 933 /* 934 * If there is a colon, switch pools. 935 */ 936 q = strchr(arg, ':'); 937 if (q) { 938 *q++ = '\0'; 939 if (zfs_mount_ds(arg) != 0) 940 return -1; 941 arg = q; 942 } 943 if ((i = ep - arg)) { 944 if ((size_t)i >= sizeof(kname)) 945 return -1; 946 memcpy(kname, arg, i + 1); 947 } 948 } 949 arg = p; 950 } 951 return 0; 952} 953