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 * $FreeBSD$ 43 */ 44 45 #include "opt_init_path.h" 46 #include "opt_mac.h" 47 48 #include <sys/param.h> 49 #include <sys/kernel.h> 50 #include <sys/exec.h> 51 #include <sys/file.h> 52 #include <sys/filedesc.h> 53 #include <sys/ktr.h> 54 #include <sys/lock.h> 55 #include <sys/mac.h> 56 #include <sys/mount.h> 57 #include <sys/mutex.h> 58 #include <sys/syscallsubr.h> 59 #include <sys/sysctl.h> 60 #include <sys/proc.h> 61 #include <sys/resourcevar.h> 62 #include <sys/systm.h> 63 #include <sys/signalvar.h> 64 #include <sys/vnode.h> 65 #include <sys/sysent.h> 66 #include <sys/reboot.h> 67 #include <sys/sched.h> 68 #include <sys/sx.h> 69 #include <sys/sysproto.h> 70 #include <sys/vmmeter.h> 71 #include <sys/unistd.h> 72 #include <sys/malloc.h> 73 #include <sys/conf.h> 74 75 #include <machine/cpu.h> 76 77 #include <vm/vm.h> 78 #include <vm/vm_param.h> 79 #include <vm/pmap.h> 80 #include <vm/vm_map.h> 81 #include <sys/user.h> 82 #include <sys/copyright.h> 83 84 void mi_startup(void); /* Should be elsewhere */ 85 86 /* Components of the first process -- never freed. */ 87 static struct session session0; 88 static struct pgrp pgrp0; 89 struct proc proc0; 90 struct thread thread0; 91 struct kse kse0; 92 struct ksegrp ksegrp0; 93 static struct procsig procsig0; 94 static struct filedesc0 filedesc0; 95 static struct plimit limit0; 96 static struct vmspace vmspace0; 97 struct proc *initproc; 98 99 int cmask = CMASK; 100 101 struct vnode *rootvp; 102 int boothowto = 0; /* initialized so that it can be patched */ 103 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, ""); 104 int bootverbose; 105 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, ""); 106 107 /* 108 * This ensures that there is at least one entry so that the sysinit_set 109 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 110 * executed. 111 */ 112 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL) 113 114 /* 115 * The sysinit table itself. Items are checked off as the are run. 116 * If we want to register new sysinit types, add them to newsysinit. 117 */ 118 SET_DECLARE(sysinit_set, struct sysinit); 119 struct sysinit **sysinit, **sysinit_end; 120 struct sysinit **newsysinit, **newsysinit_end; 121 122 /* 123 * Merge a new sysinit set into the current set, reallocating it if 124 * necessary. This can only be called after malloc is running. 125 */ 126 void 127 sysinit_add(struct sysinit **set, struct sysinit **set_end) 128 { 129 struct sysinit **newset; 130 struct sysinit **sipp; 131 struct sysinit **xipp; 132 int count; 133 134 count = set_end - set; 135 if (newsysinit) 136 count += newsysinit_end - newsysinit; 137 else 138 count += sysinit_end - sysinit; 139 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 140 if (newset == NULL) 141 panic("cannot malloc for sysinit"); 142 xipp = newset; 143 if (newsysinit) 144 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 145 *xipp++ = *sipp; 146 else 147 for (sipp = sysinit; sipp < sysinit_end; sipp++) 148 *xipp++ = *sipp; 149 for (sipp = set; sipp < set_end; sipp++) 150 *xipp++ = *sipp; 151 if (newsysinit) 152 free(newsysinit, M_TEMP); 153 newsysinit = newset; 154 newsysinit_end = newset + count; 155 } 156 157 /* 158 * System startup; initialize the world, create process 0, mount root 159 * filesystem, and fork to create init and pagedaemon. Most of the 160 * hard work is done in the lower-level initialization routines including 161 * startup(), which does memory initialization and autoconfiguration. 162 * 163 * This allows simple addition of new kernel subsystems that require 164 * boot time initialization. It also allows substitution of subsystem 165 * (for instance, a scheduler, kernel profiler, or VM system) by object 166 * module. Finally, it allows for optional "kernel threads". 167 */ 168 void 169 mi_startup(void) 170 { 171 172 register struct sysinit **sipp; /* system initialization*/ 173 register struct sysinit **xipp; /* interior loop of sort*/ 174 register struct sysinit *save; /* bubble*/ 175 176 if (sysinit == NULL) { 177 sysinit = SET_BEGIN(sysinit_set); 178 sysinit_end = SET_LIMIT(sysinit_set); 179 } 180 181 restart: 182 /* 183 * Perform a bubble sort of the system initialization objects by 184 * their subsystem (primary key) and order (secondary key). 185 */ 186 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 187 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 188 if ((*sipp)->subsystem < (*xipp)->subsystem || 189 ((*sipp)->subsystem == (*xipp)->subsystem && 190 (*sipp)->order <= (*xipp)->order)) 191 continue; /* skip*/ 192 save = *sipp; 193 *sipp = *xipp; 194 *xipp = save; 195 } 196 } 197 198 /* 199 * Traverse the (now) ordered list of system initialization tasks. 200 * Perform each task, and continue on to the next task. 201 * 202 * The last item on the list is expected to be the scheduler, 203 * which will not return. 204 */ 205 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 206 207 if ((*sipp)->subsystem == SI_SUB_DUMMY) 208 continue; /* skip dummy task(s)*/ 209 210 if ((*sipp)->subsystem == SI_SUB_DONE) 211 continue; 212 213 /* Call function */ 214 (*((*sipp)->func))((*sipp)->udata); 215 216 /* Check off the one we're just done */ 217 (*sipp)->subsystem = SI_SUB_DONE; 218 219 /* Check if we've installed more sysinit items via KLD */ 220 if (newsysinit != NULL) { 221 if (sysinit != SET_BEGIN(sysinit_set)) 222 free(sysinit, M_TEMP); 223 sysinit = newsysinit; 224 sysinit_end = newsysinit_end; 225 newsysinit = NULL; 226 newsysinit_end = NULL; 227 goto restart; 228 } 229 } 230 231 panic("Shouldn't get here!"); 232 /* NOTREACHED*/ 233 } 234 235 236 /* 237 *************************************************************************** 238 **** 239 **** The following SYSINIT's belong elsewhere, but have not yet 240 **** been moved. 241 **** 242 *************************************************************************** 243 */ 244 static void 245 print_caddr_t(void *data __unused) 246 { 247 printf("%s", (char *)data); 248 } 249 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright) 250 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, version) 251 252 static void 253 set_boot_verbose(void *data __unused) 254 { 255 256 if (boothowto & RB_VERBOSE) 257 bootverbose++; 258 } 259 SYSINIT(boot_verbose, SI_SUB_TUNABLES, SI_ORDER_ANY, set_boot_verbose, NULL) 260 261 struct sysentvec null_sysvec = { 262 0, 263 NULL, 264 0, 265 0, 266 NULL, 267 0, 268 NULL, 269 NULL, 270 NULL, 271 NULL, 272 NULL, 273 NULL, 274 NULL, 275 "null", 276 NULL, 277 NULL, 278 0, 279 PAGE_SIZE, 280 VM_MIN_ADDRESS, 281 VM_MAXUSER_ADDRESS, 282 USRSTACK, 283 PS_STRINGS, 284 VM_PROT_ALL, 285 NULL, 286 NULL 287 }; 288 289 /* 290 *************************************************************************** 291 **** 292 **** The two following SYSINIT's are proc0 specific glue code. I am not 293 **** convinced that they can not be safely combined, but their order of 294 **** operation has been maintained as the same as the original init_main.c 295 **** for right now. 296 **** 297 **** These probably belong in init_proc.c or kern_proc.c, since they 298 **** deal with proc0 (the fork template process). 299 **** 300 *************************************************************************** 301 */ 302 /* ARGSUSED*/ 303 static void 304 proc0_init(void *dummy __unused) 305 { 306 register struct proc *p; 307 register struct filedesc0 *fdp; 308 register unsigned i; 309 struct thread *td; 310 struct ksegrp *kg; 311 struct kse *ke; 312 313 GIANT_REQUIRED; 314 p = &proc0; 315 td = &thread0; 316 ke = &kse0; 317 kg = &ksegrp0; 318 319 ke->ke_sched = kse0_sched; 320 kg->kg_sched = ksegrp0_sched; 321 p->p_sched = proc0_sched; 322 td->td_sched = thread0_sched; 323 324 /* 325 * Initialize magic number. 326 */ 327 p->p_magic = P_MAGIC; 328 329 /* 330 * Initialize thread, process and pgrp structures. 331 */ 332 procinit(); 333 threadinit(); 334 335 /* 336 * Initialize sleep queue hash table 337 */ 338 sleepinit(); 339 340 /* 341 * additional VM structures 342 */ 343 vm_init2(); 344 345 /* 346 * Create process 0 (the swapper). 347 */ 348 LIST_INSERT_HEAD(&allproc, p, p_list); 349 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 350 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 351 p->p_pgrp = &pgrp0; 352 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 353 LIST_INIT(&pgrp0.pg_members); 354 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 355 356 pgrp0.pg_session = &session0; 357 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 358 session0.s_count = 1; 359 session0.s_leader = p; 360 361 p->p_sysent = &null_sysvec; 362 363 /* 364 * proc_linkup was already done in init_i386() or alphainit() etc. 365 * because the earlier code needed to follow td->td_proc. Otherwise 366 * I would have done it here.. maybe this means this should be 367 * done earlier too. 368 */ 369 p->p_flag = P_SYSTEM; 370 p->p_sflag = PS_INMEM; 371 p->p_state = PRS_NORMAL; 372 td->td_state = TDS_RUNNING; 373 kg->kg_nice = NZERO; 374 kg->kg_pri_class = PRI_TIMESHARE; 375 kg->kg_user_pri = PUSER; 376 td->td_priority = PVM; 377 td->td_base_pri = PUSER; 378 td->td_kse = ke; /* XXXKSE */ 379 ke->ke_oncpu = 0; 380 ke->ke_state = KES_THREAD; 381 ke->ke_thread = td; 382 p->p_peers = 0; 383 p->p_leader = p; 384 385 386 bcopy("swapper", p->p_comm, sizeof ("swapper")); 387 388 callout_init(&p->p_itcallout, 1); 389 callout_init(&td->td_slpcallout, 1); 390 391 /* Create credentials. */ 392 p->p_ucred = crget(); 393 p->p_ucred->cr_ngroups = 1; /* group 0 */ 394 p->p_ucred->cr_uidinfo = uifind(0); 395 p->p_ucred->cr_ruidinfo = uifind(0); 396 p->p_ucred->cr_prison = NULL; /* Don't jail it. */ 397 #ifdef MAC 398 mac_create_proc0(p->p_ucred); 399 #endif 400 td->td_ucred = crhold(p->p_ucred); 401 402 /* Create procsig. */ 403 p->p_procsig = &procsig0; 404 p->p_procsig->ps_refcnt = 1; 405 406 /* Initialize signal state for process 0. */ 407 siginit(&proc0); 408 409 /* Create the file descriptor table. */ 410 fdp = &filedesc0; 411 p->p_fd = &fdp->fd_fd; 412 mtx_init(&fdp->fd_fd.fd_mtx, FILEDESC_LOCK_DESC, NULL, MTX_DEF); 413 fdp->fd_fd.fd_refcnt = 1; 414 fdp->fd_fd.fd_cmask = cmask; 415 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles; 416 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags; 417 fdp->fd_fd.fd_nfiles = NDFILE; 418 419 /* Create the limits structures. */ 420 p->p_limit = &limit0; 421 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 422 limit0.pl_rlimit[i].rlim_cur = 423 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 424 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = 425 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 426 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = 427 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 428 i = ptoa(cnt.v_free_count); 429 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i; 430 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i; 431 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3; 432 limit0.p_refcnt = 1; 433 p->p_cpulimit = RLIM_INFINITY; 434 435 /* Allocate a prototype map so we have something to fork. */ 436 pmap_pinit0(vmspace_pmap(&vmspace0)); 437 p->p_vmspace = &vmspace0; 438 vmspace0.vm_refcnt = 1; 439 vm_map_init(&vmspace0.vm_map, p->p_sysent->sv_minuser, 440 p->p_sysent->sv_maxuser); 441 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0); 442 443 /* 444 * We continue to place resource usage info and signal 445 * actions in the user struct so they're pageable. 446 */ 447 p->p_stats = &p->p_uarea->u_stats; 448 p->p_sigacts = &p->p_uarea->u_sigacts; 449 450 /* 451 * Charge root for one process. 452 */ 453 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 454 } 455 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL) 456 457 /* ARGSUSED*/ 458 static void 459 proc0_post(void *dummy __unused) 460 { 461 struct timespec ts; 462 struct proc *p; 463 464 /* 465 * Now we can look at the time, having had a chance to verify the 466 * time from the filesystem. Pretend that proc0 started now. 467 */ 468 sx_slock(&allproc_lock); 469 LIST_FOREACH(p, &allproc, p_list) { 470 microtime(&p->p_stats->p_start); 471 p->p_runtime.sec = 0; 472 p->p_runtime.frac = 0; 473 } 474 sx_sunlock(&allproc_lock); 475 binuptime(PCPU_PTR(switchtime)); 476 PCPU_SET(switchticks, ticks); 477 478 /* 479 * Give the ``random'' number generator a thump. 480 */ 481 nanotime(&ts); 482 srandom(ts.tv_sec ^ ts.tv_nsec); 483 } 484 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL) 485 486 /* 487 *************************************************************************** 488 **** 489 **** The following SYSINIT's and glue code should be moved to the 490 **** respective files on a per subsystem basis. 491 **** 492 *************************************************************************** 493 */ 494 495 496 /* 497 *************************************************************************** 498 **** 499 **** The following code probably belongs in another file, like 500 **** kern/init_init.c. 501 **** 502 *************************************************************************** 503 */ 504 505 /* 506 * List of paths to try when searching for "init". 507 */ 508 static char init_path[MAXPATHLEN] = 509 #ifdef INIT_PATH 510 __XSTRING(INIT_PATH); 511 #else 512 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall"; 513 #endif 514 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 515 "Path used to search the init process"); 516 517 /* 518 * Start the initial user process; try exec'ing each pathname in init_path. 519 * The program is invoked with one argument containing the boot flags. 520 */ 521 static void 522 start_init(void *dummy) 523 { 524 vm_offset_t addr; 525 struct execve_args args; 526 int options, error; 527 char *var, *path, *next, *s; 528 char *ucp, **uap, *arg0, *arg1; 529 struct thread *td; 530 struct proc *p; 531 int init_does_devfs = 0; 532 533 mtx_lock(&Giant); 534 535 GIANT_REQUIRED; 536 537 td = curthread; 538 p = td->td_proc; 539 540 vfs_mountroot(); 541 542 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 543 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 544 panic("cannot find root vnode"); 545 FILEDESC_LOCK(p->p_fd); 546 p->p_fd->fd_cdir = rootvnode; 547 VREF(p->p_fd->fd_cdir); 548 p->p_fd->fd_rdir = rootvnode; 549 VREF(p->p_fd->fd_rdir); 550 FILEDESC_UNLOCK(p->p_fd); 551 VOP_UNLOCK(rootvnode, 0, td); 552 #ifdef MAC 553 mac_create_root_mount(td->td_ucred, TAILQ_FIRST(&mountlist)); 554 #endif 555 556 /* 557 * For disk based systems, we probably cannot do this yet 558 * since the fs will be read-only. But a NFS root 559 * might be ok. It is worth a shot. 560 */ 561 error = kern_mkdir(td, "/dev", UIO_SYSSPACE, 0700); 562 if (error == EEXIST) 563 error = 0; 564 if (error == 0) 565 error = kernel_vmount(0, "fstype", "devfs", 566 "fspath", "/dev", NULL); 567 if (error != 0) 568 init_does_devfs = 1; 569 570 /* 571 * Need just enough stack to hold the faked-up "execve()" arguments. 572 */ 573 addr = p->p_sysent->sv_usrstack - PAGE_SIZE; 574 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE, 575 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0) 576 panic("init: couldn't allocate argument space"); 577 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 578 p->p_vmspace->vm_ssize = 1; 579 580 if ((var = getenv("init_path")) != NULL) { 581 strlcpy(init_path, var, sizeof(init_path)); 582 freeenv(var); 583 } 584 585 for (path = init_path; *path != '\0'; path = next) { 586 while (*path == ':') 587 path++; 588 if (*path == '\0') 589 break; 590 for (next = path; *next != '\0' && *next != ':'; next++) 591 /* nothing */ ; 592 if (bootverbose) 593 printf("start_init: trying %.*s\n", (int)(next - path), 594 path); 595 596 /* 597 * Move out the boot flag argument. 598 */ 599 options = 0; 600 ucp = (char *)p->p_sysent->sv_usrstack; 601 (void)subyte(--ucp, 0); /* trailing zero */ 602 if (boothowto & RB_SINGLE) { 603 (void)subyte(--ucp, 's'); 604 options = 1; 605 } 606 #ifdef notyet 607 if (boothowto & RB_FASTBOOT) { 608 (void)subyte(--ucp, 'f'); 609 options = 1; 610 } 611 #endif 612 613 #ifdef BOOTCDROM 614 (void)subyte(--ucp, 'C'); 615 options = 1; 616 #endif 617 if (init_does_devfs) { 618 (void)subyte(--ucp, 'd'); 619 options = 1; 620 } 621 622 if (options == 0) 623 (void)subyte(--ucp, '-'); 624 (void)subyte(--ucp, '-'); /* leading hyphen */ 625 arg1 = ucp; 626 627 /* 628 * Move out the file name (also arg 0). 629 */ 630 (void)subyte(--ucp, 0); 631 for (s = next - 1; s >= path; s--) 632 (void)subyte(--ucp, *s); 633 arg0 = ucp; 634 635 /* 636 * Move out the arg pointers. 637 */ 638 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 639 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 640 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 641 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 642 643 /* 644 * Point at the arguments. 645 */ 646 args.fname = arg0; 647 args.argv = uap; 648 args.envv = NULL; 649 650 /* 651 * Now try to exec the program. If can't for any reason 652 * other than it doesn't exist, complain. 653 * 654 * Otherwise, return via fork_trampoline() all the way 655 * to user mode as init! 656 */ 657 if ((error = execve(td, &args)) == 0) { 658 mtx_unlock(&Giant); 659 return; 660 } 661 if (error != ENOENT) 662 printf("exec %.*s: error %d\n", (int)(next - path), 663 path, error); 664 } 665 printf("init: not found in path %s\n", init_path); 666 panic("no init"); 667 } 668 669 /* 670 * Like kthread_create(), but runs in it's own address space. 671 * We do this early to reserve pid 1. 672 * 673 * Note special case - do not make it runnable yet. Other work 674 * in progress will change this more. 675 */ 676 static void 677 create_init(const void *udata __unused) 678 { 679 struct ucred *newcred, *oldcred; 680 int error; 681 682 error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc); 683 if (error) 684 panic("cannot fork init: %d\n", error); 685 /* divorce init's credentials from the kernel's */ 686 newcred = crget(); 687 PROC_LOCK(initproc); 688 initproc->p_flag |= P_SYSTEM; 689 oldcred = initproc->p_ucred; 690 crcopy(newcred, oldcred); 691 #ifdef MAC 692 mac_create_proc1(newcred); 693 #endif 694 initproc->p_ucred = newcred; 695 PROC_UNLOCK(initproc); 696 crfree(oldcred); 697 cred_update_thread(FIRST_THREAD_IN_PROC(initproc)); 698 mtx_lock_spin(&sched_lock); 699 initproc->p_sflag |= PS_INMEM; 700 mtx_unlock_spin(&sched_lock); 701 cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL); 702 } 703 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL) 704 705 /* 706 * Make it runnable now. 707 */ 708 static void 709 kick_init(const void *udata __unused) 710 { 711 struct thread *td; 712 713 td = FIRST_THREAD_IN_PROC(initproc); 714 mtx_lock_spin(&sched_lock); 715 TD_SET_CAN_RUN(td); 716 setrunqueue(td); /* XXXKSE */ 717 mtx_unlock_spin(&sched_lock); 718 } 719 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL) 720