1 /*- 2 * Copyright (c) 1995 Terrence R. Lambert 3 * All rights reserved. 4 * 5 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 42 */ 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include "opt_ddb.h" 48 #include "opt_init_path.h" 49 #include "opt_mac.h" 50 51 #include <sys/param.h> 52 #include <sys/kernel.h> 53 #include <sys/exec.h> 54 #include <sys/file.h> 55 #include <sys/filedesc.h> 56 #include <sys/ktr.h> 57 #include <sys/lock.h> 58 #include <sys/mount.h> 59 #include <sys/mutex.h> 60 #include <sys/syscallsubr.h> 61 #include <sys/sysctl.h> 62 #include <sys/proc.h> 63 #include <sys/resourcevar.h> 64 #include <sys/systm.h> 65 #include <sys/signalvar.h> 66 #include <sys/vnode.h> 67 #include <sys/sysent.h> 68 #include <sys/reboot.h> 69 #include <sys/sched.h> 70 #include <sys/sx.h> 71 #include <sys/sysproto.h> 72 #include <sys/vmmeter.h> 73 #include <sys/unistd.h> 74 #include <sys/malloc.h> 75 #include <sys/conf.h> 76 77 #include <machine/cpu.h> 78 79 #include <security/audit/audit.h> 80 #include <security/mac/mac_framework.h> 81 82 #include <vm/vm.h> 83 #include <vm/vm_param.h> 84 #include <vm/pmap.h> 85 #include <vm/vm_map.h> 86 #include <sys/copyright.h> 87 88 #include <ddb/ddb.h> 89 #include <ddb/db_sym.h> 90 91 void mi_startup(void); /* Should be elsewhere */ 92 93 /* Components of the first process -- never freed. */ 94 static struct session session0; 95 static struct pgrp pgrp0; 96 struct proc proc0; 97 struct thread thread0 __aligned(8); 98 struct vmspace vmspace0; 99 struct proc *initproc; 100 101 int boothowto = 0; /* initialized so that it can be patched */ 102 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, ""); 103 int bootverbose; 104 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, ""); 105 106 /* 107 * This ensures that there is at least one entry so that the sysinit_set 108 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 109 * executed. 110 */ 111 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL) 112 113 /* 114 * The sysinit table itself. Items are checked off as the are run. 115 * If we want to register new sysinit types, add them to newsysinit. 116 */ 117 SET_DECLARE(sysinit_set, struct sysinit); 118 struct sysinit **sysinit, **sysinit_end; 119 struct sysinit **newsysinit, **newsysinit_end; 120 121 /* 122 * Merge a new sysinit set into the current set, reallocating it if 123 * necessary. This can only be called after malloc is running. 124 */ 125 void 126 sysinit_add(struct sysinit **set, struct sysinit **set_end) 127 { 128 struct sysinit **newset; 129 struct sysinit **sipp; 130 struct sysinit **xipp; 131 int count; 132 133 count = set_end - set; 134 if (newsysinit) 135 count += newsysinit_end - newsysinit; 136 else 137 count += sysinit_end - sysinit; 138 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 139 if (newset == NULL) 140 panic("cannot malloc for sysinit"); 141 xipp = newset; 142 if (newsysinit) 143 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 144 *xipp++ = *sipp; 145 else 146 for (sipp = sysinit; sipp < sysinit_end; sipp++) 147 *xipp++ = *sipp; 148 for (sipp = set; sipp < set_end; sipp++) 149 *xipp++ = *sipp; 150 if (newsysinit) 151 free(newsysinit, M_TEMP); 152 newsysinit = newset; 153 newsysinit_end = newset + count; 154 } 155 156 /* 157 * System startup; initialize the world, create process 0, mount root 158 * filesystem, and fork to create init and pagedaemon. Most of the 159 * hard work is done in the lower-level initialization routines including 160 * startup(), which does memory initialization and autoconfiguration. 161 * 162 * This allows simple addition of new kernel subsystems that require 163 * boot time initialization. It also allows substitution of subsystem 164 * (for instance, a scheduler, kernel profiler, or VM system) by object 165 * module. Finally, it allows for optional "kernel threads". 166 */ 167 void 168 mi_startup(void) 169 { 170 171 register struct sysinit **sipp; /* system initialization*/ 172 register struct sysinit **xipp; /* interior loop of sort*/ 173 register struct sysinit *save; /* bubble*/ 174 175 #if defined(VERBOSE_SYSINIT) 176 int last; 177 int verbose; 178 #endif 179 180 if (sysinit == NULL) { 181 sysinit = SET_BEGIN(sysinit_set); 182 sysinit_end = SET_LIMIT(sysinit_set); 183 } 184 185 restart: 186 /* 187 * Perform a bubble sort of the system initialization objects by 188 * their subsystem (primary key) and order (secondary key). 189 */ 190 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 191 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 192 if ((*sipp)->subsystem < (*xipp)->subsystem || 193 ((*sipp)->subsystem == (*xipp)->subsystem && 194 (*sipp)->order <= (*xipp)->order)) 195 continue; /* skip*/ 196 save = *sipp; 197 *sipp = *xipp; 198 *xipp = save; 199 } 200 } 201 202 #if defined(VERBOSE_SYSINIT) 203 last = SI_SUB_COPYRIGHT; 204 verbose = 0; 205 #if !defined(DDB) 206 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 207 #endif 208 #endif 209 210 /* 211 * Traverse the (now) ordered list of system initialization tasks. 212 * Perform each task, and continue on to the next task. 213 * 214 * The last item on the list is expected to be the scheduler, 215 * which will not return. 216 */ 217 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 218 219 if ((*sipp)->subsystem == SI_SUB_DUMMY) 220 continue; /* skip dummy task(s)*/ 221 222 if ((*sipp)->subsystem == SI_SUB_DONE) 223 continue; 224 225 #if defined(VERBOSE_SYSINIT) 226 if ((*sipp)->subsystem > last) { 227 verbose = 1; 228 last = (*sipp)->subsystem; 229 printf("subsystem %x\n", last); 230 } 231 if (verbose) { 232 #if defined(DDB) 233 const char *name; 234 c_db_sym_t sym; 235 db_expr_t offset; 236 237 sym = db_search_symbol((vm_offset_t)(*sipp)->func, 238 DB_STGY_PROC, &offset); 239 db_symbol_values(sym, &name, NULL); 240 if (name != NULL) 241 printf(" %s(%p)... ", name, (*sipp)->udata); 242 else 243 #endif 244 printf(" %p(%p)... ", (*sipp)->func, 245 (*sipp)->udata); 246 } 247 #endif 248 249 /* Call function */ 250 (*((*sipp)->func))((*sipp)->udata); 251 252 #if defined(VERBOSE_SYSINIT) 253 if (verbose) 254 printf("done.\n"); 255 #endif 256 257 /* Check off the one we're just done */ 258 (*sipp)->subsystem = SI_SUB_DONE; 259 260 /* Check if we've installed more sysinit items via KLD */ 261 if (newsysinit != NULL) { 262 if (sysinit != SET_BEGIN(sysinit_set)) 263 free(sysinit, M_TEMP); 264 sysinit = newsysinit; 265 sysinit_end = newsysinit_end; 266 newsysinit = NULL; 267 newsysinit_end = NULL; 268 goto restart; 269 } 270 } 271 272 panic("Shouldn't get here!"); 273 /* NOTREACHED*/ 274 } 275 276 277 /* 278 *************************************************************************** 279 **** 280 **** The following SYSINIT's belong elsewhere, but have not yet 281 **** been moved. 282 **** 283 *************************************************************************** 284 */ 285 static void 286 print_caddr_t(void *data __unused) 287 { 288 printf("%s", (char *)data); 289 } 290 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright) 291 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, trademark) 292 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_caddr_t, version) 293 294 #ifdef WITNESS 295 static char wit_warn[] = 296 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 297 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 1, 298 print_caddr_t, wit_warn) 299 #endif 300 301 #ifdef DIAGNOSTIC 302 static char diag_warn[] = 303 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 304 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 2, 305 print_caddr_t, diag_warn) 306 #endif 307 308 static void 309 set_boot_verbose(void *data __unused) 310 { 311 312 if (boothowto & RB_VERBOSE) 313 bootverbose++; 314 } 315 SYSINIT(boot_verbose, SI_SUB_TUNABLES, SI_ORDER_ANY, set_boot_verbose, NULL) 316 317 struct sysentvec null_sysvec = { 318 0, 319 NULL, 320 0, 321 0, 322 NULL, 323 0, 324 NULL, 325 NULL, 326 NULL, 327 NULL, 328 NULL, 329 NULL, 330 NULL, 331 "null", 332 NULL, 333 NULL, 334 0, 335 PAGE_SIZE, 336 VM_MIN_ADDRESS, 337 VM_MAXUSER_ADDRESS, 338 USRSTACK, 339 PS_STRINGS, 340 VM_PROT_ALL, 341 NULL, 342 NULL, 343 NULL 344 }; 345 346 /* 347 *************************************************************************** 348 **** 349 **** The two following SYSINIT's are proc0 specific glue code. I am not 350 **** convinced that they can not be safely combined, but their order of 351 **** operation has been maintained as the same as the original init_main.c 352 **** for right now. 353 **** 354 **** These probably belong in init_proc.c or kern_proc.c, since they 355 **** deal with proc0 (the fork template process). 356 **** 357 *************************************************************************** 358 */ 359 /* ARGSUSED*/ 360 static void 361 proc0_init(void *dummy __unused) 362 { 363 struct proc *p; 364 unsigned i; 365 struct thread *td; 366 367 GIANT_REQUIRED; 368 p = &proc0; 369 td = &thread0; 370 371 /* 372 * Initialize magic number. 373 */ 374 p->p_magic = P_MAGIC; 375 376 /* 377 * Initialize thread and process structures. 378 */ 379 procinit(); /* set up proc zone */ 380 threadinit(); /* set up UMA zones */ 381 382 /* 383 * Initialise scheduler resources. 384 * Add scheduler specific parts to proc, thread as needed. 385 */ 386 schedinit(); /* scheduler gets its house in order */ 387 /* 388 * Initialize sleep queue hash table 389 */ 390 sleepinit(); 391 392 /* 393 * additional VM structures 394 */ 395 vm_init2(); 396 397 /* 398 * Create process 0 (the swapper). 399 */ 400 LIST_INSERT_HEAD(&allproc, p, p_list); 401 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 402 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 403 p->p_pgrp = &pgrp0; 404 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 405 LIST_INIT(&pgrp0.pg_members); 406 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 407 408 pgrp0.pg_session = &session0; 409 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 410 session0.s_count = 1; 411 session0.s_leader = p; 412 413 p->p_sysent = &null_sysvec; 414 p->p_flag = P_SYSTEM; 415 p->p_sflag = PS_INMEM; 416 p->p_state = PRS_NORMAL; 417 knlist_init(&p->p_klist, &p->p_mtx, NULL, NULL, NULL); 418 STAILQ_INIT(&p->p_ktr); 419 p->p_nice = NZERO; 420 td->td_state = TDS_RUNNING; 421 td->td_pri_class = PRI_TIMESHARE; 422 td->td_user_pri = PUSER; 423 td->td_base_user_pri = PUSER; 424 td->td_priority = PVM; 425 td->td_base_pri = PUSER; 426 td->td_oncpu = 0; 427 p->p_peers = 0; 428 p->p_leader = p; 429 430 431 bcopy("swapper", p->p_comm, sizeof ("swapper")); 432 433 callout_init(&p->p_itcallout, CALLOUT_MPSAFE); 434 callout_init(&td->td_slpcallout, CALLOUT_MPSAFE); 435 436 /* Create credentials. */ 437 p->p_ucred = crget(); 438 p->p_ucred->cr_ngroups = 1; /* group 0 */ 439 p->p_ucred->cr_uidinfo = uifind(0); 440 p->p_ucred->cr_ruidinfo = uifind(0); 441 p->p_ucred->cr_prison = NULL; /* Don't jail it. */ 442 #ifdef AUDIT 443 audit_proc_alloc(p); 444 audit_proc_kproc0(p); 445 #endif 446 #ifdef MAC 447 mac_create_proc0(p->p_ucred); 448 #endif 449 td->td_ucred = crhold(p->p_ucred); 450 451 /* Create sigacts. */ 452 p->p_sigacts = sigacts_alloc(); 453 454 /* Initialize signal state for process 0. */ 455 siginit(&proc0); 456 457 /* Create the file descriptor table. */ 458 p->p_fd = fdinit(NULL); 459 p->p_fdtol = NULL; 460 461 /* Create the limits structures. */ 462 p->p_limit = lim_alloc(); 463 for (i = 0; i < RLIM_NLIMITS; i++) 464 p->p_limit->pl_rlimit[i].rlim_cur = 465 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 466 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 467 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 468 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 469 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 470 i = ptoa(cnt.v_free_count); 471 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = i; 472 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i; 473 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3; 474 p->p_cpulimit = RLIM_INFINITY; 475 476 p->p_stats = pstats_alloc(); 477 478 /* Allocate a prototype map so we have something to fork. */ 479 pmap_pinit0(vmspace_pmap(&vmspace0)); 480 p->p_vmspace = &vmspace0; 481 vmspace0.vm_refcnt = 1; 482 vm_map_init(&vmspace0.vm_map, p->p_sysent->sv_minuser, 483 p->p_sysent->sv_maxuser); 484 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0); 485 486 /* 487 * Charge root for one process. 488 */ 489 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 490 } 491 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL) 492 493 /* ARGSUSED*/ 494 static void 495 proc0_post(void *dummy __unused) 496 { 497 struct timespec ts; 498 struct proc *p; 499 500 /* 501 * Now we can look at the time, having had a chance to verify the 502 * time from the filesystem. Pretend that proc0 started now. 503 */ 504 sx_slock(&allproc_lock); 505 LIST_FOREACH(p, &allproc, p_list) { 506 microuptime(&p->p_stats->p_start); 507 p->p_rux.rux_runtime = 0; 508 } 509 sx_sunlock(&allproc_lock); 510 PCPU_SET(switchtime, cpu_ticks()); 511 PCPU_SET(switchticks, ticks); 512 513 /* 514 * Give the ``random'' number generator a thump. 515 */ 516 nanotime(&ts); 517 srandom(ts.tv_sec ^ ts.tv_nsec); 518 } 519 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL) 520 521 /* 522 *************************************************************************** 523 **** 524 **** The following SYSINIT's and glue code should be moved to the 525 **** respective files on a per subsystem basis. 526 **** 527 *************************************************************************** 528 */ 529 530 531 /* 532 *************************************************************************** 533 **** 534 **** The following code probably belongs in another file, like 535 **** kern/init_init.c. 536 **** 537 *************************************************************************** 538 */ 539 540 /* 541 * List of paths to try when searching for "init". 542 */ 543 static char init_path[MAXPATHLEN] = 544 #ifdef INIT_PATH 545 __XSTRING(INIT_PATH); 546 #else 547 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init:/stand/sysinstall"; 548 #endif 549 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 550 "Path used to search the init process"); 551 552 /* 553 * Shutdown timeout of init(8). 554 * Unused within kernel, but used to control init(8), hence do not remove. 555 */ 556 #ifndef INIT_SHUTDOWN_TIMEOUT 557 #define INIT_SHUTDOWN_TIMEOUT 120 558 #endif 559 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 560 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 561 CTLFLAG_RW, &init_shutdown_timeout, 0, ""); 562 563 /* 564 * Start the initial user process; try exec'ing each pathname in init_path. 565 * The program is invoked with one argument containing the boot flags. 566 */ 567 static void 568 start_init(void *dummy) 569 { 570 vm_offset_t addr; 571 struct execve_args args; 572 int options, error; 573 char *var, *path, *next, *s; 574 char *ucp, **uap, *arg0, *arg1; 575 struct thread *td; 576 struct proc *p; 577 578 mtx_lock(&Giant); 579 580 GIANT_REQUIRED; 581 582 td = curthread; 583 p = td->td_proc; 584 585 vfs_mountroot(); 586 587 /* 588 * Need just enough stack to hold the faked-up "execve()" arguments. 589 */ 590 addr = p->p_sysent->sv_usrstack - PAGE_SIZE; 591 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE, 592 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0) 593 panic("init: couldn't allocate argument space"); 594 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 595 p->p_vmspace->vm_ssize = 1; 596 597 if ((var = getenv("init_path")) != NULL) { 598 strlcpy(init_path, var, sizeof(init_path)); 599 freeenv(var); 600 } 601 602 for (path = init_path; *path != '\0'; path = next) { 603 while (*path == ':') 604 path++; 605 if (*path == '\0') 606 break; 607 for (next = path; *next != '\0' && *next != ':'; next++) 608 /* nothing */ ; 609 if (bootverbose) 610 printf("start_init: trying %.*s\n", (int)(next - path), 611 path); 612 613 /* 614 * Move out the boot flag argument. 615 */ 616 options = 0; 617 ucp = (char *)p->p_sysent->sv_usrstack; 618 (void)subyte(--ucp, 0); /* trailing zero */ 619 if (boothowto & RB_SINGLE) { 620 (void)subyte(--ucp, 's'); 621 options = 1; 622 } 623 #ifdef notyet 624 if (boothowto & RB_FASTBOOT) { 625 (void)subyte(--ucp, 'f'); 626 options = 1; 627 } 628 #endif 629 630 #ifdef BOOTCDROM 631 (void)subyte(--ucp, 'C'); 632 options = 1; 633 #endif 634 635 if (options == 0) 636 (void)subyte(--ucp, '-'); 637 (void)subyte(--ucp, '-'); /* leading hyphen */ 638 arg1 = ucp; 639 640 /* 641 * Move out the file name (also arg 0). 642 */ 643 (void)subyte(--ucp, 0); 644 for (s = next - 1; s >= path; s--) 645 (void)subyte(--ucp, *s); 646 arg0 = ucp; 647 648 /* 649 * Move out the arg pointers. 650 */ 651 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 652 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 653 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 654 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 655 656 /* 657 * Point at the arguments. 658 */ 659 args.fname = arg0; 660 args.argv = uap; 661 args.envv = NULL; 662 663 /* 664 * Now try to exec the program. If can't for any reason 665 * other than it doesn't exist, complain. 666 * 667 * Otherwise, return via fork_trampoline() all the way 668 * to user mode as init! 669 */ 670 if ((error = execve(td, &args)) == 0) { 671 mtx_unlock(&Giant); 672 return; 673 } 674 if (error != ENOENT) 675 printf("exec %.*s: error %d\n", (int)(next - path), 676 path, error); 677 } 678 printf("init: not found in path %s\n", init_path); 679 panic("no init"); 680 } 681 682 /* 683 * Like kthread_create(), but runs in it's own address space. 684 * We do this early to reserve pid 1. 685 * 686 * Note special case - do not make it runnable yet. Other work 687 * in progress will change this more. 688 */ 689 static void 690 create_init(const void *udata __unused) 691 { 692 struct ucred *newcred, *oldcred; 693 int error; 694 695 error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc); 696 if (error) 697 panic("cannot fork init: %d\n", error); 698 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 699 /* divorce init's credentials from the kernel's */ 700 newcred = crget(); 701 PROC_LOCK(initproc); 702 initproc->p_flag |= P_SYSTEM; 703 oldcred = initproc->p_ucred; 704 crcopy(newcred, oldcred); 705 #ifdef MAC 706 mac_create_proc1(newcred); 707 #endif 708 #ifdef AUDIT 709 audit_proc_init(initproc); 710 #endif 711 initproc->p_ucred = newcred; 712 PROC_UNLOCK(initproc); 713 crfree(oldcred); 714 cred_update_thread(FIRST_THREAD_IN_PROC(initproc)); 715 mtx_lock_spin(&sched_lock); 716 initproc->p_sflag |= PS_INMEM; 717 mtx_unlock_spin(&sched_lock); 718 cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL); 719 } 720 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL) 721 722 /* 723 * Make it runnable now. 724 */ 725 static void 726 kick_init(const void *udata __unused) 727 { 728 struct thread *td; 729 730 td = FIRST_THREAD_IN_PROC(initproc); 731 mtx_lock_spin(&sched_lock); 732 TD_SET_CAN_RUN(td); 733 setrunqueue(td, SRQ_BORING); 734 mtx_unlock_spin(&sched_lock); 735 } 736 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL) 737