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("$FreeBSD$"); 18 19 #include <sys/param.h> 20 #include <sys/gpt.h> 21 #include <sys/dirent.h> 22 #include <sys/reboot.h> 23 24 #include <machine/bootinfo.h> 25 #include <machine/elf.h> 26 #include <machine/pc/bios.h> 27 #include <machine/psl.h> 28 29 #include <stdarg.h> 30 31 #include <a.out.h> 32 33 #include <btxv86.h> 34 35 #include "stand.h" 36 37 #include "bootargs.h" 38 #include "lib.h" 39 #include "rbx.h" 40 #include "drv.h" 41 #include "cons.h" 42 #include "gpt.h" 43 #include "paths.h" 44 45 #define ARGS 0x900 46 #define NOPT 14 47 #define NDEV 3 48 #define MEM_BASE 0x12 49 #define MEM_EXT 0x15 50 51 #define DRV_HARD 0x80 52 #define DRV_MASK 0x7f 53 54 #define TYPE_AD 0 55 #define TYPE_DA 1 56 #define TYPE_MAXHARD TYPE_DA 57 #define TYPE_FD 2 58 59 extern uint32_t _end; 60 61 static const uuid_t freebsd_ufs_uuid = GPT_ENT_TYPE_FREEBSD_UFS; 62 static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */ 63 static const unsigned char flags[NOPT] = { 64 RBX_DUAL, 65 RBX_SERIAL, 66 RBX_ASKNAME, 67 RBX_CDROM, 68 RBX_CONFIG, 69 RBX_KDB, 70 RBX_GDB, 71 RBX_MUTE, 72 RBX_NOINTR, 73 RBX_PAUSE, 74 RBX_QUIET, 75 RBX_DFLTROOT, 76 RBX_SINGLE, 77 RBX_VERBOSE 78 }; 79 uint32_t opts; 80 81 static const char *const dev_nm[NDEV] = {"ad", "da", "fd"}; 82 static const unsigned char dev_maj[NDEV] = {30, 4, 2}; 83 84 static struct dsk dsk; 85 static char kname[1024]; 86 static int comspeed = SIOSPD; 87 static struct bootinfo bootinfo; 88 #ifdef LOADER_GELI_SUPPORT 89 static struct geli_boot_args geliargs; 90 #endif 91 92 static vm_offset_t high_heap_base; 93 static uint32_t bios_basemem, bios_extmem, high_heap_size; 94 95 static struct bios_smap smap; 96 97 /* 98 * The minimum amount of memory to reserve in bios_extmem for the heap. 99 */ 100 #define HEAP_MIN (3 * 1024 * 1024) 101 102 static char *heap_next; 103 static char *heap_end; 104 105 void exit(int); 106 static void load(void); 107 static int parse_cmds(char *, int *); 108 static int dskread(void *, daddr_t, unsigned); 109 #ifdef LOADER_GELI_SUPPORT 110 static int vdev_read(void *vdev __unused, void *priv, off_t off, void *buf, 111 size_t bytes); 112 #endif 113 114 #include "ufsread.c" 115 #include "gpt.c" 116 #ifdef LOADER_GELI_SUPPORT 117 #include "geliboot.c" 118 static char gelipw[GELI_PW_MAXLEN]; 119 static struct keybuf *gelibuf; 120 #endif 121 122 static inline int 123 xfsread(ufs_ino_t inode, void *buf, size_t nbyte) 124 { 125 126 if ((size_t)fsread(inode, buf, nbyte) != nbyte) { 127 printf("Invalid %s\n", "format"); 128 return (-1); 129 } 130 return (0); 131 } 132 133 static void 134 bios_getmem(void) 135 { 136 uint64_t size; 137 138 /* Parse system memory map */ 139 v86.ebx = 0; 140 do { 141 v86.ctl = V86_FLAGS; 142 v86.addr = MEM_EXT; /* int 0x15 function 0xe820*/ 143 v86.eax = 0xe820; 144 v86.ecx = sizeof(struct bios_smap); 145 v86.edx = SMAP_SIG; 146 v86.es = VTOPSEG(&smap); 147 v86.edi = VTOPOFF(&smap); 148 v86int(); 149 if ((v86.efl & 1) || (v86.eax != SMAP_SIG)) 150 break; 151 /* look for a low-memory segment that's large enough */ 152 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) && 153 (smap.length >= (512 * 1024))) 154 bios_basemem = smap.length; 155 /* look for the first segment in 'extended' memory */ 156 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) { 157 bios_extmem = smap.length; 158 } 159 160 /* 161 * Look for the largest segment in 'extended' memory beyond 162 * 1MB but below 4GB. 163 */ 164 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) && 165 (smap.base < 0x100000000ull)) { 166 size = smap.length; 167 168 /* 169 * If this segment crosses the 4GB boundary, truncate it. 170 */ 171 if (smap.base + size > 0x100000000ull) 172 size = 0x100000000ull - smap.base; 173 174 if (size > high_heap_size) { 175 high_heap_size = size; 176 high_heap_base = smap.base; 177 } 178 } 179 } while (v86.ebx != 0); 180 181 /* Fall back to the old compatibility function for base memory */ 182 if (bios_basemem == 0) { 183 v86.ctl = 0; 184 v86.addr = 0x12; /* int 0x12 */ 185 v86int(); 186 187 bios_basemem = (v86.eax & 0xffff) * 1024; 188 } 189 190 /* Fall back through several compatibility functions for extended memory */ 191 if (bios_extmem == 0) { 192 v86.ctl = V86_FLAGS; 193 v86.addr = 0x15; /* int 0x15 function 0xe801*/ 194 v86.eax = 0xe801; 195 v86int(); 196 if (!(v86.efl & 1)) { 197 bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024; 198 } 199 } 200 if (bios_extmem == 0) { 201 v86.ctl = 0; 202 v86.addr = 0x15; /* int 0x15 function 0x88*/ 203 v86.eax = 0x8800; 204 v86int(); 205 bios_extmem = (v86.eax & 0xffff) * 1024; 206 } 207 208 /* 209 * If we have extended memory and did not find a suitable heap 210 * region in the SMAP, use the last 3MB of 'extended' memory as a 211 * high heap candidate. 212 */ 213 if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) { 214 high_heap_size = HEAP_MIN; 215 high_heap_base = bios_extmem + 0x100000 - HEAP_MIN; 216 } 217 } 218 219 static int 220 gptinit(void) 221 { 222 223 if (gptread(&freebsd_ufs_uuid, &dsk, dmadat->secbuf) == -1) { 224 printf("%s: unable to load GPT\n", BOOTPROG); 225 return (-1); 226 } 227 if (gptfind(&freebsd_ufs_uuid, &dsk, dsk.part) == -1) { 228 printf("%s: no UFS partition was found\n", BOOTPROG); 229 return (-1); 230 } 231 #ifdef LOADER_GELI_SUPPORT 232 if (geli_taste(vdev_read, &dsk, (gpttable[curent].ent_lba_end - 233 gpttable[curent].ent_lba_start)) == 0) { 234 if (geli_havekey(&dsk) != 0 && geli_passphrase(gelipw, 235 dsk.unit, 'p', curent + 1, &dsk) != 0) { 236 printf("%s: unable to decrypt GELI key\n", BOOTPROG); 237 return (-1); 238 } 239 } 240 #endif 241 242 dsk_meta = 0; 243 return (0); 244 } 245 246 int main(void); 247 248 int 249 main(void) 250 { 251 char cmd[512], cmdtmp[512]; 252 ssize_t sz; 253 int autoboot, dskupdated; 254 ufs_ino_t ino; 255 256 dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base); 257 258 bios_getmem(); 259 260 if (high_heap_size > 0) { 261 heap_end = PTOV(high_heap_base + high_heap_size); 262 heap_next = PTOV(high_heap_base); 263 } else { 264 heap_next = (char *)dmadat + sizeof(*dmadat); 265 heap_end = (char *)PTOV(bios_basemem); 266 } 267 setheap(heap_next, heap_end); 268 269 v86.ctl = V86_FLAGS; 270 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 271 dsk.drive = *(uint8_t *)PTOV(ARGS); 272 dsk.type = dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD; 273 dsk.unit = dsk.drive & DRV_MASK; 274 dsk.part = -1; 275 dsk.start = 0; 276 bootinfo.bi_version = BOOTINFO_VERSION; 277 bootinfo.bi_size = sizeof(bootinfo); 278 bootinfo.bi_basemem = bios_basemem / 1024; 279 bootinfo.bi_extmem = bios_extmem / 1024; 280 bootinfo.bi_memsizes_valid++; 281 bootinfo.bi_bios_dev = dsk.drive; 282 283 #ifdef LOADER_GELI_SUPPORT 284 geli_init(); 285 #endif 286 /* Process configuration file */ 287 288 if (gptinit() != 0) 289 return (-1); 290 291 autoboot = 1; 292 *cmd = '\0'; 293 294 for (;;) { 295 *kname = '\0'; 296 if ((ino = lookup(PATH_CONFIG)) || 297 (ino = lookup(PATH_DOTCONFIG))) { 298 sz = fsread(ino, cmd, sizeof(cmd) - 1); 299 cmd[(sz < 0) ? 0 : sz] = '\0'; 300 } 301 if (*cmd != '\0') { 302 memcpy(cmdtmp, cmd, sizeof(cmdtmp)); 303 if (parse_cmds(cmdtmp, &dskupdated)) 304 break; 305 if (dskupdated && gptinit() != 0) 306 break; 307 if (!OPT_CHECK(RBX_QUIET)) 308 printf("%s: %s", PATH_CONFIG, cmd); 309 *cmd = '\0'; 310 } 311 312 if (autoboot && keyhit(3)) { 313 if (*kname == '\0') 314 memcpy(kname, PATH_LOADER, sizeof(PATH_LOADER)); 315 break; 316 } 317 autoboot = 0; 318 319 /* 320 * Try to exec stage 3 boot loader. If interrupted by a 321 * keypress, or in case of failure, try to load a kernel 322 * directly instead. 323 */ 324 if (*kname != '\0') 325 load(); 326 memcpy(kname, PATH_LOADER, sizeof(PATH_LOADER)); 327 load(); 328 memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL)); 329 load(); 330 gptbootfailed(&dsk); 331 if (gptfind(&freebsd_ufs_uuid, &dsk, -1) == -1) 332 break; 333 dsk_meta = 0; 334 } 335 336 /* Present the user with the boot2 prompt. */ 337 338 for (;;) { 339 if (!OPT_CHECK(RBX_QUIET)) { 340 printf("\nFreeBSD/x86 boot\n" 341 "Default: %u:%s(%up%u)%s\n" 342 "boot: ", 343 dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit, 344 dsk.part, kname); 345 } 346 if (ioctrl & IO_SERIAL) 347 sio_flush(); 348 *cmd = '\0'; 349 if (keyhit(0)) 350 getstr(cmd, sizeof(cmd)); 351 else if (!OPT_CHECK(RBX_QUIET)) 352 putchar('\n'); 353 if (parse_cmds(cmd, &dskupdated)) { 354 putchar('\a'); 355 continue; 356 } 357 if (dskupdated && gptinit() != 0) 358 continue; 359 load(); 360 } 361 /* NOTREACHED */ 362 } 363 364 /* XXX - Needed for btxld to link the boot2 binary; do not remove. */ 365 void 366 exit(int x) 367 { 368 } 369 370 static void 371 load(void) 372 { 373 union { 374 struct exec ex; 375 Elf32_Ehdr eh; 376 } hdr; 377 static Elf32_Phdr ep[2]; 378 static Elf32_Shdr es[2]; 379 caddr_t p; 380 ufs_ino_t ino; 381 uint32_t addr, x; 382 int fmt, i, j; 383 384 if (!(ino = lookup(kname))) { 385 if (!ls) { 386 printf("%s: No %s on %u:%s(%up%u)\n", BOOTPROG, 387 kname, dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit, 388 dsk.part); 389 } 390 return; 391 } 392 if (xfsread(ino, &hdr, sizeof(hdr))) 393 return; 394 if (N_GETMAGIC(hdr.ex) == ZMAGIC) 395 fmt = 0; 396 else if (IS_ELF(hdr.eh)) 397 fmt = 1; 398 else { 399 printf("Invalid %s\n", "format"); 400 return; 401 } 402 if (fmt == 0) { 403 addr = hdr.ex.a_entry & 0xffffff; 404 p = PTOV(addr); 405 fs_off = PAGE_SIZE; 406 if (xfsread(ino, p, hdr.ex.a_text)) 407 return; 408 p += roundup2(hdr.ex.a_text, PAGE_SIZE); 409 if (xfsread(ino, p, hdr.ex.a_data)) 410 return; 411 p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE); 412 bootinfo.bi_symtab = VTOP(p); 413 memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms)); 414 p += sizeof(hdr.ex.a_syms); 415 if (hdr.ex.a_syms) { 416 if (xfsread(ino, p, hdr.ex.a_syms)) 417 return; 418 p += hdr.ex.a_syms; 419 if (xfsread(ino, p, sizeof(int))) 420 return; 421 x = *(uint32_t *)p; 422 p += sizeof(int); 423 x -= sizeof(int); 424 if (xfsread(ino, p, x)) 425 return; 426 p += x; 427 } 428 } else { 429 fs_off = hdr.eh.e_phoff; 430 for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) { 431 if (xfsread(ino, ep + j, sizeof(ep[0]))) 432 return; 433 if (ep[j].p_type == PT_LOAD) 434 j++; 435 } 436 for (i = 0; i < 2; i++) { 437 p = PTOV(ep[i].p_paddr & 0xffffff); 438 fs_off = ep[i].p_offset; 439 if (xfsread(ino, p, ep[i].p_filesz)) 440 return; 441 } 442 p += roundup2(ep[1].p_memsz, PAGE_SIZE); 443 bootinfo.bi_symtab = VTOP(p); 444 if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) { 445 fs_off = hdr.eh.e_shoff + sizeof(es[0]) * 446 (hdr.eh.e_shstrndx + 1); 447 if (xfsread(ino, &es, sizeof(es))) 448 return; 449 for (i = 0; i < 2; i++) { 450 memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size)); 451 p += sizeof(es[i].sh_size); 452 fs_off = es[i].sh_offset; 453 if (xfsread(ino, p, es[i].sh_size)) 454 return; 455 p += es[i].sh_size; 456 } 457 } 458 addr = hdr.eh.e_entry & 0xffffff; 459 } 460 bootinfo.bi_esymtab = VTOP(p); 461 bootinfo.bi_kernelname = VTOP(kname); 462 bootinfo.bi_bios_dev = dsk.drive; 463 #ifdef LOADER_GELI_SUPPORT 464 geliargs.size = sizeof(geliargs); 465 explicit_bzero(gelipw, sizeof(gelipw)); 466 gelibuf = malloc(sizeof(struct keybuf) + (GELI_MAX_KEYS * sizeof(struct keybuf_ent))); 467 geli_fill_keybuf(gelibuf); 468 geliargs.notapw = '\0'; 469 geliargs.keybuf_sentinel = KEYBUF_SENTINEL; 470 geliargs.keybuf = gelibuf; 471 #endif 472 __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK), 473 MAKEBOOTDEV(dev_maj[dsk.type], dsk.part + 1, dsk.unit, 0xff), 474 KARGS_FLAGS_EXTARG, 0, 0, VTOP(&bootinfo) 475 #ifdef LOADER_GELI_SUPPORT 476 , geliargs 477 #endif 478 ); 479 } 480 481 static int 482 parse_cmds(char *cmdstr, int *dskupdated) 483 { 484 char *arg = cmdstr; 485 char *ep, *p, *q; 486 const char *cp; 487 unsigned int drv; 488 int c, i, j; 489 490 *dskupdated = 0; 491 while ((c = *arg++)) { 492 if (c == ' ' || c == '\t' || c == '\n') 493 continue; 494 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++); 495 ep = p; 496 if (*p) 497 *p++ = 0; 498 if (c == '-') { 499 while ((c = *arg++)) { 500 if (c == 'P') { 501 if (*(uint8_t *)PTOV(0x496) & 0x10) { 502 cp = "yes"; 503 } else { 504 opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL); 505 cp = "no"; 506 } 507 printf("Keyboard: %s\n", cp); 508 continue; 509 } else if (c == 'S') { 510 j = 0; 511 while ((unsigned int)(i = *arg++ - '0') <= 9) 512 j = j * 10 + i; 513 if (j > 0 && i == -'0') { 514 comspeed = j; 515 break; 516 } 517 /* Fall through to error below ('S' not in optstr[]). */ 518 } 519 for (i = 0; c != optstr[i]; i++) 520 if (i == NOPT - 1) 521 return -1; 522 opts ^= OPT_SET(flags[i]); 523 } 524 ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) : 525 OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD; 526 if (ioctrl & IO_SERIAL) { 527 if (sio_init(115200 / comspeed) != 0) 528 ioctrl &= ~IO_SERIAL; 529 } 530 } else { 531 for (q = arg--; *q && *q != '('; q++); 532 if (*q) { 533 drv = -1; 534 if (arg[1] == ':') { 535 drv = *arg - '0'; 536 if (drv > 9) 537 return (-1); 538 arg += 2; 539 } 540 if (q - arg != 2) 541 return -1; 542 for (i = 0; arg[0] != dev_nm[i][0] || 543 arg[1] != dev_nm[i][1]; i++) 544 if (i == NDEV - 1) 545 return -1; 546 dsk.type = i; 547 arg += 3; 548 dsk.unit = *arg - '0'; 549 if (arg[1] != 'p' || dsk.unit > 9) 550 return -1; 551 arg += 2; 552 dsk.part = *arg - '0'; 553 if (dsk.part < 1 || dsk.part > 9) 554 return -1; 555 arg++; 556 if (arg[0] != ')') 557 return -1; 558 arg++; 559 if (drv == -1) 560 drv = dsk.unit; 561 dsk.drive = (dsk.type <= TYPE_MAXHARD 562 ? DRV_HARD : 0) + drv; 563 *dskupdated = 1; 564 } 565 if ((i = ep - arg)) { 566 if ((size_t)i >= sizeof(kname)) 567 return -1; 568 memcpy(kname, arg, i + 1); 569 } 570 } 571 arg = p; 572 } 573 return 0; 574 } 575 576 static int 577 dskread(void *buf, daddr_t lba, unsigned nblk) 578 { 579 int err; 580 581 err = drvread(&dsk, buf, lba + dsk.start, nblk); 582 583 #ifdef LOADER_GELI_SUPPORT 584 if (err == 0 && is_geli(&dsk) == 0) { 585 /* Decrypt */ 586 if (geli_read(&dsk, lba * DEV_BSIZE, buf, nblk * DEV_BSIZE)) 587 return (err); 588 } 589 #endif 590 591 return (err); 592 } 593 594 #ifdef LOADER_GELI_SUPPORT 595 /* 596 * Read function compartible with the ZFS callback, required to keep the GELI 597 * Implementation the same for both UFS and ZFS 598 */ 599 static int 600 vdev_read(void *vdev __unused, void *priv, off_t off, void *buf, size_t bytes) 601 { 602 char *p; 603 daddr_t lba; 604 unsigned int nb; 605 struct dsk *dskp = (struct dsk *) priv; 606 607 if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1))) 608 return (-1); 609 610 p = buf; 611 lba = off / DEV_BSIZE; 612 lba += dskp->start; 613 614 while (bytes > 0) { 615 nb = bytes / DEV_BSIZE; 616 if (nb > VBLKSIZE / DEV_BSIZE) 617 nb = VBLKSIZE / DEV_BSIZE; 618 if (drvread(dskp, dmadat->blkbuf, lba, nb)) 619 return (-1); 620 memcpy(p, dmadat->blkbuf, nb * DEV_BSIZE); 621 p += nb * DEV_BSIZE; 622 lba += nb; 623 bytes -= nb * DEV_BSIZE; 624 } 625 626 return (0); 627 } 628 #endif /* LOADER_GELI_SUPPORT */ 629