Fix typo.
[dragonfly.git] / sys / kern / init_main.c
CommitLineData
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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: src/sys/kern/init_main.c,v 1.134.2.8 2003/06/06 20:21:32 tegge Exp $
bb3cd951 43 * $DragonFly: src/sys/kern/init_main.c,v 1.64 2006/09/19 11:47:35 corecode Exp $
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44 */
45
46#include "opt_init_path.h"
47
48#include <sys/param.h>
49#include <sys/file.h>
50#include <sys/filedesc.h>
51#include <sys/kernel.h>
52#include <sys/mount.h>
53#include <sys/sysctl.h>
54#include <sys/proc.h>
55#include <sys/resourcevar.h>
56#include <sys/signalvar.h>
57#include <sys/systm.h>
58#include <sys/vnode.h>
59#include <sys/sysent.h>
60#include <sys/reboot.h>
61#include <sys/sysproto.h>
62#include <sys/vmmeter.h>
63#include <sys/unistd.h>
64#include <sys/malloc.h>
dadab5e9 65#include <sys/file2.h>
f8c3996b 66#include <sys/thread2.h>
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67
68#include <machine/cpu.h>
69
70#include <vm/vm.h>
71#include <vm/vm_param.h>
72#include <sys/lock.h>
73#include <vm/pmap.h>
74#include <vm/vm_map.h>
75#include <sys/user.h>
76#include <sys/copyright.h>
77
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78void mi_startup(void); /* Should be elsewhere */
79
80/* Components of the first process -- never freed. */
81static struct session session0;
82static struct pgrp pgrp0;
984263bc 83static struct procsig procsig0;
0679adc4 84static struct filedesc filedesc0;
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85static struct plimit limit0;
86static struct vmspace vmspace0;
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87struct proc *initproc;
88struct proc proc0;
89struct thread thread0;
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90
91int cmask = CMASK;
92extern struct user *proc0paddr;
93extern int fallback_elf_brand;
94
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95int boothowto = 0; /* initialized so that it can be patched */
96SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
97
98/*
99 * This ensures that there is at least one entry so that the sysinit_set
100 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
101 * executed.
102 */
103SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
104
105/*
106 * The sysinit table itself. Items are checked off as the are run.
107 * If we want to register new sysinit types, add them to newsysinit.
108 */
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109SET_DECLARE(sysinit_set, struct sysinit);
110struct sysinit **sysinit, **sysinit_end;
111struct sysinit **newsysinit, **newsysinit_end;
112
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113
114/*
115 * Merge a new sysinit set into the current set, reallocating it if
116 * necessary. This can only be called after malloc is running.
117 */
118void
dc62b251 119sysinit_add(struct sysinit **set, struct sysinit **set_end)
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120{
121 struct sysinit **newset;
122 struct sysinit **sipp;
123 struct sysinit **xipp;
dc62b251 124 int count;
984263bc 125
dc62b251 126 count = set_end - set;
984263bc 127 if (newsysinit)
dc62b251 128 count += newsysinit_end - newsysinit;
984263bc 129 else
dc62b251 130 count += sysinit_end - sysinit;
efda3bd0 131 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK);
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132 if (newset == NULL)
133 panic("cannot malloc for sysinit");
134 xipp = newset;
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135 if (newsysinit) {
136 for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
984263bc 137 *xipp++ = *sipp;
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138 } else {
139 for (sipp = sysinit; sipp < sysinit_end; sipp++)
984263bc 140 *xipp++ = *sipp;
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141 }
142 for (sipp = set; sipp < set_end; sipp++)
984263bc 143 *xipp++ = *sipp;
984263bc 144 if (newsysinit)
efda3bd0 145 kfree(newsysinit, M_TEMP);
984263bc 146 newsysinit = newset;
dc62b251 147 newsysinit_end = newset + count;
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148}
149
150/*
151 * System startup; initialize the world, create process 0, mount root
152 * filesystem, and fork to create init and pagedaemon. Most of the
153 * hard work is done in the lower-level initialization routines including
154 * startup(), which does memory initialization and autoconfiguration.
155 *
156 * This allows simple addition of new kernel subsystems that require
157 * boot time initialization. It also allows substitution of subsystem
158 * (for instance, a scheduler, kernel profiler, or VM system) by object
159 * module. Finally, it allows for optional "kernel threads".
160 */
161void
162mi_startup(void)
163{
8a8d5d85 164 struct sysinit *sip; /* system initialization*/
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165 struct sysinit **sipp; /* system initialization*/
166 struct sysinit **xipp; /* interior loop of sort*/
167 struct sysinit *save; /* bubble*/
984263bc 168
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169 if (sysinit == NULL) {
170 sysinit = SET_BEGIN(sysinit_set);
171 sysinit_end = SET_LIMIT(sysinit_set);
172 }
173
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174restart:
175 /*
176 * Perform a bubble sort of the system initialization objects by
177 * their subsystem (primary key) and order (secondary key).
178 */
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179 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
180 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
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181 if ((*sipp)->subsystem < (*xipp)->subsystem ||
182 ((*sipp)->subsystem == (*xipp)->subsystem &&
183 (*sipp)->order <= (*xipp)->order))
184 continue; /* skip*/
185 save = *sipp;
186 *sipp = *xipp;
187 *xipp = save;
188 }
189 }
190
191 /*
192 * Traverse the (now) ordered list of system initialization tasks.
193 * Perform each task, and continue on to the next task.
194 *
195 * The last item on the list is expected to be the scheduler,
196 * which will not return.
197 */
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198 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
199 sip = *sipp;
8a8d5d85 200 if (sip->subsystem == SI_SUB_DUMMY)
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201 continue; /* skip dummy task(s)*/
202
8a8d5d85 203 if (sip->subsystem == SI_SUB_DONE)
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204 continue;
205
206 /* Call function */
8a8d5d85 207 (*(sip->func))(sip->udata);
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208
209 /* Check off the one we're just done */
8a8d5d85 210 sip->subsystem = SI_SUB_DONE;
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211
212 /* Check if we've installed more sysinit items via KLD */
213 if (newsysinit != NULL) {
dc62b251 214 if (sysinit != SET_BEGIN(sysinit_set))
efda3bd0 215 kfree(sysinit, M_TEMP);
984263bc 216 sysinit = newsysinit;
dc62b251 217 sysinit_end = newsysinit_end;
984263bc 218 newsysinit = NULL;
dc62b251 219 newsysinit_end = NULL;
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220 goto restart;
221 }
222 }
223
224 panic("Shouldn't get here!");
225 /* NOTREACHED*/
226}
227
228
229/*
230 ***************************************************************************
231 ****
232 **** The following SYSINIT's belong elsewhere, but have not yet
233 **** been moved.
234 ****
235 ***************************************************************************
236 */
237static void
238print_caddr_t(void *data __unused)
239{
240 printf("%s", (char *)data);
241}
242SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
243
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244/*
245 * Leave the critical section that protected us from spurious interrupts
246 * so device probes work.
247 */
248static void
249leavecrit(void *dummy __unused)
250{
251 crit_exit();
252 KKASSERT(!IN_CRITICAL_SECT(curthread));
253 if (bootverbose)
254 printf("Leaving critical section, allowing interrupts\n");
255}
256SYSINIT(leavecrit, SI_SUB_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL)
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257
258/*
259 ***************************************************************************
260 ****
261 **** The two following SYSINT's are proc0 specific glue code. I am not
262 **** convinced that they can not be safely combined, but their order of
263 **** operation has been maintained as the same as the original init_main.c
264 **** for right now.
265 ****
266 **** These probably belong in init_proc.c or kern_proc.c, since they
267 **** deal with proc0 (the fork template process).
268 ****
269 ***************************************************************************
270 */
271/* ARGSUSED*/
272static void
273proc0_init(void *dummy __unused)
274{
0679adc4 275 struct proc *p;
81eea9f4 276 struct lwp *lp;
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277
278 p = &proc0;
81eea9f4 279 lp = &proc0.p_lwp; /* XXX lwp to be: lwp0 */
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280
281 /*
282 * Initialize process and pgrp structures.
283 */
284 procinit();
285
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286 /*
287 * additional VM structures
288 */
289 vm_init2();
290
291 /*
292 * Create process 0 (the swapper).
293 */
294 LIST_INSERT_HEAD(&allproc, p, p_list);
295 p->p_pgrp = &pgrp0;
296 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
297 LIST_INIT(&pgrp0.pg_members);
298 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
299
300 pgrp0.pg_session = &session0;
301 session0.s_count = 1;
302 session0.s_leader = p;
303
304 p->p_sysent = &aout_sysvec;
305
344ad853 306 p->p_flag = P_SYSTEM;
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307 p->p_stat = SRUN;
308 p->p_nice = NZERO;
309 p->p_rtprio.type = RTP_PRIO_NORMAL;
310 p->p_rtprio.prio = 0;
b19f1310 311 p->p_lwp.lwp_rtprio = p->p_rtprio;
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312
313 p->p_peers = 0;
314 p->p_leader = p;
315
316 bcopy("swapper", p->p_comm, sizeof ("swapper"));
81eea9f4 317 bcopy("swapper", thread0.td_comm, sizeof ("swapper"));
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318
319 /* Create credentials. */
984263bc 320 p->p_ucred = crget();
41c20dac 321 p->p_ucred->cr_ruidinfo = uifind(0);
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322 p->p_ucred->cr_ngroups = 1; /* group 0 */
323 p->p_ucred->cr_uidinfo = uifind(0);
324
325 /* Don't jail it */
41c20dac 326 p->p_ucred->cr_prison = NULL;
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327
328 /* Create procsig. */
329 p->p_procsig = &procsig0;
330 p->p_procsig->ps_refcnt = 1;
331
332 /* Initialize signal state for process 0. */
c0b8a06d 333 siginit(p);
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334
335 /* Create the file descriptor table. */
228b401d 336 fdinit_bootstrap(p, &filedesc0, cmask);
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337
338 /* Create the limits structures. */
c0b8a06d 339 plimit_init0(&limit0);
984263bc 340 p->p_limit = &limit0;
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341
342 /* Allocate a prototype map so we have something to fork. */
343 pmap_pinit0(vmspace_pmap(&vmspace0));
344 p->p_vmspace = &vmspace0;
345 vmspace0.vm_refcnt = 1;
346 vm_map_init(&vmspace0.vm_map, round_page(VM_MIN_ADDRESS),
347 trunc_page(VM_MAXUSER_ADDRESS));
348 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
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349
350 /*
351 * We continue to place resource usage info and signal
352 * actions in the user struct so they're pageable.
353 */
354 p->p_stats = &p->p_addr->u_stats;
355 p->p_sigacts = &p->p_addr->u_sigacts;
356
357 /*
358 * Charge root for one process.
359 */
41c20dac 360 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0);
984263bc 361
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362}
363SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
364
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365static int proc0_post_callback(struct proc *p, void *data __unused);
366
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367/* ARGSUSED*/
368static void
369proc0_post(void *dummy __unused)
370{
371 struct timespec ts;
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372
373 /*
374 * Now we can look at the time, having had a chance to verify the
375 * time from the file system. Pretend that proc0 started now.
376 */
8fa76237 377 allproc_scan(proc0_post_callback, NULL);
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378
379 /*
380 * Give the ``random'' number generator a thump.
381 * XXX: Does read_random() contain enough bits to be used here ?
382 */
383 nanotime(&ts);
cddfb7bb 384 skrandom(ts.tv_sec ^ ts.tv_nsec);
984263bc 385}
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386
387static int
388proc0_post_callback(struct proc *p, void *data __unused)
389{
390 microtime(&p->p_start);
391 return(0);
392}
393
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394SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
395
396/*
397 ***************************************************************************
398 ****
399 **** The following SYSINIT's and glue code should be moved to the
400 **** respective files on a per subsystem basis.
401 ****
402 ***************************************************************************
403 */
404
405
406/*
407 ***************************************************************************
408 ****
409 **** The following code probably belongs in another file, like
410 **** kern/init_init.c.
411 ****
412 ***************************************************************************
413 */
414
415/*
416 * List of paths to try when searching for "init".
417 */
418static char init_path[MAXPATHLEN] =
419#ifdef INIT_PATH
420 __XSTRING(INIT_PATH);
421#else
422 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
423#endif
424SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
425
426/*
427 * Start the initial user process; try exec'ing each pathname in init_path.
428 * The program is invoked with one argument containing the boot flags.
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429 *
430 * The MP lock is held on entry.
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431 */
432static void
433start_init(void *dummy)
434{
435 vm_offset_t addr;
436 struct execve_args args;
437 int options, error;
438 char *var, *path, *next, *s;
439 char *ucp, **uap, *arg0, *arg1;
440 struct proc *p;
553ea3c8 441 struct lwp *lp;
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442 struct mount *mp;
443 struct vnode *vp;
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444
445 p = curproc;
446
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447 KKASSERT(p->p_nthreads == 1);
448
449 lp = LIST_FIRST(&p->p_lwps);
450
984263bc 451 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
861905fb 452 mp = mountlist_boot_getfirst();
21739618 453 if (VFS_ROOT(mp, &vp))
984263bc 454 panic("cannot find root vnode");
8c361dda 455 if (mp->mnt_ncp == NULL) {
5fd012e0 456 mp->mnt_ncp = cache_allocroot(mp, vp);
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457 cache_unlock(mp->mnt_ncp); /* leave ref intact */
458 }
21739618 459 p->p_fd->fd_cdir = vp;
597aea93 460 vref(p->p_fd->fd_cdir);
21739618 461 p->p_fd->fd_rdir = vp;
597aea93 462 vref(p->p_fd->fd_rdir);
21739618 463 vfs_cache_setroot(vp, cache_hold(mp->mnt_ncp));
a11aaa81 464 vn_unlock(vp); /* leave ref intact */
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465 p->p_fd->fd_ncdir = cache_hold(mp->mnt_ncp);
466 p->p_fd->fd_nrdir = cache_hold(mp->mnt_ncp);
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467
468 /*
469 * Need just enough stack to hold the faked-up "execve()" arguments.
470 */
471 addr = trunc_page(USRSTACK - PAGE_SIZE);
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472 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
473 FALSE,
474 VM_MAPTYPE_NORMAL,
475 VM_PROT_ALL, VM_PROT_ALL,
476 0);
477 if (error)
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478 panic("init: couldn't allocate argument space");
479 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
480 p->p_vmspace->vm_ssize = 1;
481
bc01a404 482 if ((var = kgetenv("init_path")) != NULL) {
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483 strncpy(init_path, var, sizeof init_path);
484 init_path[sizeof init_path - 1] = 0;
485 }
bc01a404 486 if ((var = kgetenv("kern.fallback_elf_brand")) != NULL)
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487 fallback_elf_brand = strtol(var, NULL, 0);
488
489 for (path = init_path; *path != '\0'; path = next) {
490 while (*path == ':')
491 path++;
492 if (*path == '\0')
493 break;
494 for (next = path; *next != '\0' && *next != ':'; next++)
495 /* nothing */ ;
496 if (bootverbose)
497 printf("start_init: trying %.*s\n", (int)(next - path),
498 path);
499
500 /*
501 * Move out the boot flag argument.
502 */
503 options = 0;
504 ucp = (char *)USRSTACK;
505 (void)subyte(--ucp, 0); /* trailing zero */
506 if (boothowto & RB_SINGLE) {
507 (void)subyte(--ucp, 's');
508 options = 1;
509 }
510#ifdef notyet
511 if (boothowto & RB_FASTBOOT) {
512 (void)subyte(--ucp, 'f');
513 options = 1;
514 }
515#endif
516
517#ifdef BOOTCDROM
518 (void)subyte(--ucp, 'C');
519 options = 1;
520#endif
521 if (options == 0)
522 (void)subyte(--ucp, '-');
523 (void)subyte(--ucp, '-'); /* leading hyphen */
524 arg1 = ucp;
525
526 /*
527 * Move out the file name (also arg 0).
528 */
529 (void)subyte(--ucp, 0);
530 for (s = next - 1; s >= path; s--)
531 (void)subyte(--ucp, *s);
532 arg0 = ucp;
533
534 /*
535 * Move out the arg pointers.
536 */
537 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
538 (void)suword((caddr_t)--uap, (long)0); /* terminator */
539 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
540 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
541
542 /*
543 * Point at the arguments.
544 */
545 args.fname = arg0;
546 args.argv = uap;
547 args.envv = NULL;
548
549 /*
550 * Now try to exec the program. If can't for any reason
551 * other than it doesn't exist, complain.
552 *
553 * Otherwise, return via fork_trampoline() all the way
554 * to user mode as init!
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555 *
556 * WARNING! We may have been moved to another cpu after
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557 * acquiring the current user process designation. The
558 * MP lock will migrate with us though so we still have to
559 * release it.
984263bc 560 */
753fd850 561 if ((error = sys_execve(&args)) == 0) {
8a8d5d85 562 rel_mplock();
52eedfb5 563 lp->lwp_proc->p_usched->acquire_curproc(lp);
984263bc 564 return;
8a8d5d85 565 }
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566 if (error != ENOENT)
567 printf("exec %.*s: error %d\n", (int)(next - path),
568 path, error);
569 }
570 printf("init: not found in path %s\n", init_path);
571 panic("no init");
572}
573
574/*
575 * Like kthread_create(), but runs in it's own address space.
576 * We do this early to reserve pid 1.
577 *
578 * Note special case - do not make it runnable yet. Other work
579 * in progress will change this more.
580 */
581static void
582create_init(const void *udata __unused)
583{
584 int error;
bb3cd951 585 struct lwp *lp;
984263bc 586
e43a034f 587 crit_enter();
553ea3c8 588 error = fork1(&proc0.p_lwp, RFFDG | RFPROC, &initproc);
984263bc 589 if (error)
fc92d4aa 590 panic("cannot fork init: %d", error);
344ad853 591 initproc->p_flag |= P_SYSTEM;
bb3cd951
SS
592 lp = LIST_FIRST(&initproc->p_lwps);
593 cpu_set_fork_handler(lp, start_init, NULL);
e43a034f 594 crit_exit();
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595}
596SYSINIT(init,SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
597
598/*
599 * Make it runnable now.
600 */
601static void
602kick_init(const void *udata __unused)
603{
553ea3c8 604 start_forked_proc(&proc0.p_lwp, initproc);
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605}
606SYSINIT(kickinit,SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
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607
608/*
609 * Machine independant globaldata initialization
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610 *
611 * WARNING! Called from early boot, 'mycpu' may not work yet.
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612 */
613void
d0e06f83 614mi_gdinit(struct globaldata *gd, int cpuid)
8ad65e08 615{
85100692 616 TAILQ_INIT(&gd->gd_tdfreeq); /* for pmap_{new,dispose}_thread() */
88c4d2f6 617 TAILQ_INIT(&gd->gd_systimerq);
d0e06f83 618 gd->gd_cpuid = cpuid;
fda1ad89 619 gd->gd_cpumask = (cpumask_t)1 << cpuid;
8ad65e08 620 lwkt_gdinit(gd);
41a01a4d 621 vm_map_entry_reserve_cpu_init(gd);
fc17ad60 622 sleep_gdinit(gd);
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623}
624
625