FreeBSD/Linux Kernel Cross Reference
sys/kern/init_main.c
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: releng/5.0/sys/kern/init_main.c 107426 2002-11-30 22:15:30Z keramida $
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 extern int fallback_elf_brand;
101
102 struct vnode *rootvp;
103 int boothowto = 0; /* initialized so that it can be patched */
104 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
105 int bootverbose;
106 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, "");
107
108 /*
109 * This ensures that there is at least one entry so that the sysinit_set
110 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
111 * executed.
112 */
113 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
114
115 /*
116 * The sysinit table itself. Items are checked off as the are run.
117 * If we want to register new sysinit types, add them to newsysinit.
118 */
119 SET_DECLARE(sysinit_set, struct sysinit);
120 struct sysinit **sysinit, **sysinit_end;
121 struct sysinit **newsysinit, **newsysinit_end;
122
123 /*
124 * Merge a new sysinit set into the current set, reallocating it if
125 * necessary. This can only be called after malloc is running.
126 */
127 void
128 sysinit_add(struct sysinit **set, struct sysinit **set_end)
129 {
130 struct sysinit **newset;
131 struct sysinit **sipp;
132 struct sysinit **xipp;
133 int count;
134
135 count = set_end - set;
136 if (newsysinit)
137 count += newsysinit_end - newsysinit;
138 else
139 count += sysinit_end - sysinit;
140 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
141 if (newset == NULL)
142 panic("cannot malloc for sysinit");
143 xipp = newset;
144 if (newsysinit)
145 for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
146 *xipp++ = *sipp;
147 else
148 for (sipp = sysinit; sipp < sysinit_end; sipp++)
149 *xipp++ = *sipp;
150 for (sipp = set; sipp < set_end; sipp++)
151 *xipp++ = *sipp;
152 if (newsysinit)
153 free(newsysinit, M_TEMP);
154 newsysinit = newset;
155 newsysinit_end = newset + count;
156 }
157
158 /*
159 * System startup; initialize the world, create process 0, mount root
160 * filesystem, and fork to create init and pagedaemon. Most of the
161 * hard work is done in the lower-level initialization routines including
162 * startup(), which does memory initialization and autoconfiguration.
163 *
164 * This allows simple addition of new kernel subsystems that require
165 * boot time initialization. It also allows substitution of subsystem
166 * (for instance, a scheduler, kernel profiler, or VM system) by object
167 * module. Finally, it allows for optional "kernel threads".
168 */
169 void
170 mi_startup(void)
171 {
172
173 register struct sysinit **sipp; /* system initialization*/
174 register struct sysinit **xipp; /* interior loop of sort*/
175 register struct sysinit *save; /* bubble*/
176
177 if (sysinit == NULL) {
178 sysinit = SET_BEGIN(sysinit_set);
179 sysinit_end = SET_LIMIT(sysinit_set);
180 }
181
182 restart:
183 /*
184 * Perform a bubble sort of the system initialization objects by
185 * their subsystem (primary key) and order (secondary key).
186 */
187 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
188 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
189 if ((*sipp)->subsystem < (*xipp)->subsystem ||
190 ((*sipp)->subsystem == (*xipp)->subsystem &&
191 (*sipp)->order <= (*xipp)->order))
192 continue; /* skip*/
193 save = *sipp;
194 *sipp = *xipp;
195 *xipp = save;
196 }
197 }
198
199 /*
200 * Traverse the (now) ordered list of system initialization tasks.
201 * Perform each task, and continue on to the next task.
202 *
203 * The last item on the list is expected to be the scheduler,
204 * which will not return.
205 */
206 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
207
208 if ((*sipp)->subsystem == SI_SUB_DUMMY)
209 continue; /* skip dummy task(s)*/
210
211 if ((*sipp)->subsystem == SI_SUB_DONE)
212 continue;
213
214 /* Call function */
215 (*((*sipp)->func))((*sipp)->udata);
216
217 /* Check off the one we're just done */
218 (*sipp)->subsystem = SI_SUB_DONE;
219
220 /* Check if we've installed more sysinit items via KLD */
221 if (newsysinit != NULL) {
222 if (sysinit != SET_BEGIN(sysinit_set))
223 free(sysinit, M_TEMP);
224 sysinit = newsysinit;
225 sysinit_end = newsysinit_end;
226 newsysinit = NULL;
227 newsysinit_end = NULL;
228 goto restart;
229 }
230 }
231
232 panic("Shouldn't get here!");
233 /* NOTREACHED*/
234 }
235
236
237 /*
238 ***************************************************************************
239 ****
240 **** The following SYSINIT's belong elsewhere, but have not yet
241 **** been moved.
242 ****
243 ***************************************************************************
244 */
245 static void
246 print_caddr_t(void *data __unused)
247 {
248 printf("%s", (char *)data);
249 }
250 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
251 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, version)
252
253 static void
254 set_boot_verbose(void *data __unused)
255 {
256
257 if (boothowto & RB_VERBOSE)
258 bootverbose++;
259 }
260 SYSINIT(boot_verbose, SI_SUB_TUNABLES, SI_ORDER_ANY, set_boot_verbose, NULL)
261
262 struct sysentvec null_sysvec = {
263 0,
264 NULL,
265 0,
266 0,
267 NULL,
268 0,
269 NULL,
270 NULL,
271 NULL,
272 NULL,
273 NULL,
274 NULL,
275 NULL,
276 "null",
277 NULL,
278 NULL,
279 0,
280 PAGE_SIZE,
281 VM_MIN_ADDRESS,
282 VM_MAXUSER_ADDRESS,
283 USRSTACK,
284 PS_STRINGS,
285 VM_PROT_ALL,
286 NULL,
287 NULL
288 };
289
290 /*
291 ***************************************************************************
292 ****
293 **** The two following SYSINIT's are proc0 specific glue code. I am not
294 **** convinced that they can not be safely combined, but their order of
295 **** operation has been maintained as the same as the original init_main.c
296 **** for right now.
297 ****
298 **** These probably belong in init_proc.c or kern_proc.c, since they
299 **** deal with proc0 (the fork template process).
300 ****
301 ***************************************************************************
302 */
303 /* ARGSUSED*/
304 static void
305 proc0_init(void *dummy __unused)
306 {
307 register struct proc *p;
308 register struct filedesc0 *fdp;
309 register unsigned i;
310 struct thread *td;
311 struct ksegrp *kg;
312 struct kse *ke;
313
314 GIANT_REQUIRED;
315 p = &proc0;
316 td = &thread0;
317 ke = &kse0;
318 kg = &ksegrp0;
319
320 ke->ke_sched = kse0_sched;
321 kg->kg_sched = ksegrp0_sched;
322 p->p_sched = proc0_sched;
323 td->td_sched = thread0_sched;
324
325 /*
326 * Initialize magic number.
327 */
328 p->p_magic = P_MAGIC;
329
330 /*
331 * Initialize thread, process and pgrp structures.
332 */
333 procinit();
334 threadinit();
335
336 /*
337 * Initialize sleep queue hash table
338 */
339 sleepinit();
340
341 /*
342 * additional VM structures
343 */
344 vm_init2();
345
346 /*
347 * Create process 0 (the swapper).
348 */
349 LIST_INSERT_HEAD(&allproc, p, p_list);
350 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash);
351 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
352 p->p_pgrp = &pgrp0;
353 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
354 LIST_INIT(&pgrp0.pg_members);
355 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
356
357 pgrp0.pg_session = &session0;
358 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF);
359 session0.s_count = 1;
360 session0.s_leader = p;
361
362 p->p_sysent = &null_sysvec;
363
364 /*
365 * proc_linkup was already done in init_i386() or alphainit() etc.
366 * because the earlier code needed to follow td->td_proc. Otherwise
367 * I would have done it here.. maybe this means this should be
368 * done earlier too.
369 */
370 p->p_flag = P_SYSTEM;
371 p->p_sflag = PS_INMEM;
372 p->p_state = PRS_NORMAL;
373 td->td_state = TDS_RUNNING;
374 kg->kg_nice = NZERO;
375 kg->kg_pri_class = PRI_TIMESHARE;
376 kg->kg_user_pri = PUSER;
377 td->td_priority = PVM;
378 td->td_base_pri = PUSER;
379 td->td_kse = ke; /* XXXKSE */
380 ke->ke_oncpu = 0;
381 ke->ke_state = KES_THREAD;
382 ke->ke_thread = td;
383 p->p_peers = 0;
384 p->p_leader = p;
385
386
387 bcopy("swapper", p->p_comm, sizeof ("swapper"));
388
389 callout_init(&p->p_itcallout, 0);
390 callout_init(&td->td_slpcallout, 1);
391
392 /* Create credentials. */
393 p->p_ucred = crget();
394 p->p_ucred->cr_ngroups = 1; /* group 0 */
395 p->p_ucred->cr_uidinfo = uifind(0);
396 p->p_ucred->cr_ruidinfo = uifind(0);
397 p->p_ucred->cr_prison = NULL; /* Don't jail it. */
398 #ifdef MAC
399 mac_create_proc0(p->p_ucred);
400 #endif
401 td->td_ucred = crhold(p->p_ucred);
402
403 /* Create procsig. */
404 p->p_procsig = &procsig0;
405 p->p_procsig->ps_refcnt = 1;
406
407 /* Initialize signal state for process 0. */
408 siginit(&proc0);
409
410 /* Create the file descriptor table. */
411 fdp = &filedesc0;
412 p->p_fd = &fdp->fd_fd;
413 mtx_init(&fdp->fd_fd.fd_mtx, FILEDESC_LOCK_DESC, NULL, MTX_DEF);
414 fdp->fd_fd.fd_refcnt = 1;
415 fdp->fd_fd.fd_cmask = cmask;
416 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles;
417 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags;
418 fdp->fd_fd.fd_nfiles = NDFILE;
419
420 /* Create the limits structures. */
421 p->p_limit = &limit0;
422 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++)
423 limit0.pl_rlimit[i].rlim_cur =
424 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
425 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur =
426 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
427 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur =
428 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
429 i = ptoa(cnt.v_free_count);
430 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
431 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
432 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
433 limit0.p_refcnt = 1;
434 p->p_cpulimit = RLIM_INFINITY;
435
436 /* Allocate a prototype map so we have something to fork. */
437 pmap_pinit0(vmspace_pmap(&vmspace0));
438 p->p_vmspace = &vmspace0;
439 vmspace0.vm_refcnt = 1;
440 vm_map_init(&vmspace0.vm_map, p->p_sysent->sv_minuser,
441 p->p_sysent->sv_maxuser);
442 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
443
444 /*
445 * We continue to place resource usage info and signal
446 * actions in the user struct so they're pageable.
447 */
448 p->p_stats = &p->p_uarea->u_stats;
449 p->p_sigacts = &p->p_uarea->u_sigacts;
450
451 /*
452 * Charge root for one process.
453 */
454 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0);
455 }
456 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
457
458 /* ARGSUSED*/
459 static void
460 proc0_post(void *dummy __unused)
461 {
462 struct timespec ts;
463 struct proc *p;
464
465 /*
466 * Now we can look at the time, having had a chance to verify the
467 * time from the filesystem. Pretend that proc0 started now.
468 */
469 sx_slock(&allproc_lock);
470 LIST_FOREACH(p, &allproc, p_list) {
471 microtime(&p->p_stats->p_start);
472 p->p_runtime.sec = 0;
473 p->p_runtime.frac = 0;
474 }
475 sx_sunlock(&allproc_lock);
476 binuptime(PCPU_PTR(switchtime));
477 PCPU_SET(switchticks, ticks);
478
479 /*
480 * Give the ``random'' number generator a thump.
481 */
482 nanotime(&ts);
483 srandom(ts.tv_sec ^ ts.tv_nsec);
484 }
485 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
486
487 /*
488 ***************************************************************************
489 ****
490 **** The following SYSINIT's and glue code should be moved to the
491 **** respective files on a per subsystem basis.
492 ****
493 ***************************************************************************
494 */
495
496
497 /*
498 ***************************************************************************
499 ****
500 **** The following code probably belongs in another file, like
501 **** kern/init_init.c.
502 ****
503 ***************************************************************************
504 */
505
506 /*
507 * List of paths to try when searching for "init".
508 */
509 static char init_path[MAXPATHLEN] =
510 #ifdef INIT_PATH
511 __XSTRING(INIT_PATH);
512 #else
513 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
514 #endif
515 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0,
516 "Path used to search the init process");
517
518 /*
519 * Start the initial user process; try exec'ing each pathname in init_path.
520 * The program is invoked with one argument containing the boot flags.
521 */
522 static void
523 start_init(void *dummy)
524 {
525 vm_offset_t addr;
526 struct execve_args args;
527 int options, error;
528 char *var, *path, *next, *s;
529 char *ucp, **uap, *arg0, *arg1;
530 struct thread *td;
531 struct proc *p;
532 int init_does_devfs = 0;
533
534 mtx_lock(&Giant);
535
536 GIANT_REQUIRED;
537
538 td = curthread;
539 p = td->td_proc;
540
541 vfs_mountroot();
542
543 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
544 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode))
545 panic("cannot find root vnode");
546 FILEDESC_LOCK(p->p_fd);
547 p->p_fd->fd_cdir = rootvnode;
548 VREF(p->p_fd->fd_cdir);
549 p->p_fd->fd_rdir = rootvnode;
550 VREF(p->p_fd->fd_rdir);
551 FILEDESC_UNLOCK(p->p_fd);
552 VOP_UNLOCK(rootvnode, 0, td);
553 #ifdef MAC
554 mac_create_root_mount(td->td_ucred, TAILQ_FIRST(&mountlist));
555 #endif
556
557 if (devfs_present) {
558 /*
559 * For disk based systems, we probably cannot do this yet
560 * since the fs will be read-only. But a NFS root
561 * might be ok. It is worth a shot.
562 */
563 error = kern_mkdir(td, "/dev", UIO_SYSSPACE, 0700);
564 if (error == EEXIST)
565 error = 0;
566 if (error == 0)
567 error = kernel_vmount(0, "fstype", "devfs",
568 "fspath", "/dev", NULL);
569 if (error != 0)
570 init_does_devfs = 1;
571 }
572
573 /*
574 * Need just enough stack to hold the faked-up "execve()" arguments.
575 */
576 addr = p->p_sysent->sv_usrstack - PAGE_SIZE;
577 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
578 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
579 panic("init: couldn't allocate argument space");
580 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
581 p->p_vmspace->vm_ssize = 1;
582
583 if ((var = getenv("init_path")) != NULL) {
584 strlcpy(init_path, var, sizeof(init_path));
585 freeenv(var);
586 }
587 if ((var = getenv("kern.fallback_elf_brand")) != NULL) {
588 fallback_elf_brand = strtol(var, NULL, 0);
589 freeenv(var);
590 }
591
592 for (path = init_path; *path != '\0'; path = next) {
593 while (*path == ':')
594 path++;
595 if (*path == '\0')
596 break;
597 for (next = path; *next != '\0' && *next != ':'; next++)
598 /* nothing */ ;
599 if (bootverbose)
600 printf("start_init: trying %.*s\n", (int)(next - path),
601 path);
602
603 /*
604 * Move out the boot flag argument.
605 */
606 options = 0;
607 ucp = (char *)p->p_sysent->sv_usrstack;
608 (void)subyte(--ucp, 0); /* trailing zero */
609 if (boothowto & RB_SINGLE) {
610 (void)subyte(--ucp, 's');
611 options = 1;
612 }
613 #ifdef notyet
614 if (boothowto & RB_FASTBOOT) {
615 (void)subyte(--ucp, 'f');
616 options = 1;
617 }
618 #endif
619
620 #ifdef BOOTCDROM
621 (void)subyte(--ucp, 'C');
622 options = 1;
623 #endif
624 if (init_does_devfs) {
625 (void)subyte(--ucp, 'd');
626 options = 1;
627 }
628
629 if (options == 0)
630 (void)subyte(--ucp, '-');
631 (void)subyte(--ucp, '-'); /* leading hyphen */
632 arg1 = ucp;
633
634 /*
635 * Move out the file name (also arg 0).
636 */
637 (void)subyte(--ucp, 0);
638 for (s = next - 1; s >= path; s--)
639 (void)subyte(--ucp, *s);
640 arg0 = ucp;
641
642 /*
643 * Move out the arg pointers.
644 */
645 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
646 (void)suword((caddr_t)--uap, (long)0); /* terminator */
647 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
648 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
649
650 /*
651 * Point at the arguments.
652 */
653 args.fname = arg0;
654 args.argv = uap;
655 args.envv = NULL;
656
657 /*
658 * Now try to exec the program. If can't for any reason
659 * other than it doesn't exist, complain.
660 *
661 * Otherwise, return via fork_trampoline() all the way
662 * to user mode as init!
663 */
664 if ((error = execve(td, &args)) == 0) {
665 mtx_unlock(&Giant);
666 return;
667 }
668 if (error != ENOENT)
669 printf("exec %.*s: error %d\n", (int)(next - path),
670 path, error);
671 }
672 printf("init: not found in path %s\n", init_path);
673 panic("no init");
674 }
675
676 /*
677 * Like kthread_create(), but runs in it's own address space.
678 * We do this early to reserve pid 1.
679 *
680 * Note special case - do not make it runnable yet. Other work
681 * in progress will change this more.
682 */
683 static void
684 create_init(const void *udata __unused)
685 {
686 struct ucred *newcred, *oldcred;
687 int error;
688
689 error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc);
690 if (error)
691 panic("cannot fork init: %d\n", error);
692 /* divorce init's credentials from the kernel's */
693 newcred = crget();
694 PROC_LOCK(initproc);
695 initproc->p_flag |= P_SYSTEM;
696 oldcred = initproc->p_ucred;
697 crcopy(newcred, oldcred);
698 #ifdef MAC
699 mac_create_proc1(newcred);
700 #endif
701 initproc->p_ucred = newcred;
702 PROC_UNLOCK(initproc);
703 crfree(oldcred);
704 cred_update_thread(FIRST_THREAD_IN_PROC(initproc));
705 mtx_lock_spin(&sched_lock);
706 initproc->p_sflag |= PS_INMEM;
707 mtx_unlock_spin(&sched_lock);
708 cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL);
709 }
710 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
711
712 /*
713 * Make it runnable now.
714 */
715 static void
716 kick_init(const void *udata __unused)
717 {
718 struct thread *td;
719
720 td = FIRST_THREAD_IN_PROC(initproc);
721 mtx_lock_spin(&sched_lock);
722 TD_SET_CAN_RUN(td);
723 setrunqueue(td); /* XXXKSE */
724 mtx_unlock_spin(&sched_lock);
725 }
726 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
Cache object: 6610c1d2cecc52ba5b8dcfa1838b8a62
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