Replace the old BSD malloc code with a port of our slab allocator.
[dragonfly.git] / sys / kern / init_main.c
CommitLineData
984263bc
MD
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 $
7bd34050 43 * $DragonFly: src/sys/kern/init_main.c,v 1.87 2008/06/07 11:37:23 mneumann Exp $
984263bc
MD
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>
0b692e79 65#include <sys/machintr.h>
dadab5e9 66#include <sys/file2.h>
f8c3996b 67#include <sys/thread2.h>
e3161323 68#include <sys/sysref2.h>
8f1f6170 69#include <sys/spinlock2.h>
984263bc
MD
70
71#include <machine/cpu.h>
72
73#include <vm/vm.h>
74#include <vm/vm_param.h>
75#include <sys/lock.h>
76#include <vm/pmap.h>
77#include <vm/vm_map.h>
ba39e2e0 78#include <vm/vm_extern.h>
984263bc
MD
79#include <sys/user.h>
80#include <sys/copyright.h>
81
984263bc
MD
82/* Components of the first process -- never freed. */
83static struct session session0;
84static struct pgrp pgrp0;
b1b4e5a6 85static struct sigacts sigacts0;
0679adc4 86static struct filedesc filedesc0;
984263bc
MD
87static struct plimit limit0;
88static struct vmspace vmspace0;
b7c628e4
MD
89struct proc *initproc;
90struct proc proc0;
08f2f1bb 91struct lwp lwp0;
b7c628e4 92struct thread thread0;
984263bc
MD
93
94int cmask = CMASK;
95extern struct user *proc0paddr;
96extern int fallback_elf_brand;
97
984263bc
MD
98int boothowto = 0; /* initialized so that it can be patched */
99SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
100
101/*
102 * This ensures that there is at least one entry so that the sysinit_set
7bd34050 103 * symbol is not undefined. A subsystem ID of SI_SPECIAL_DUMMY is never
984263bc
MD
104 * executed.
105 */
ba39e2e0 106SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL)
984263bc
MD
107
108/*
109 * The sysinit table itself. Items are checked off as the are run.
110 * If we want to register new sysinit types, add them to newsysinit.
111 */
dc62b251
MD
112SET_DECLARE(sysinit_set, struct sysinit);
113struct sysinit **sysinit, **sysinit_end;
114struct sysinit **newsysinit, **newsysinit_end;
115
984263bc
MD
116
117/*
118 * Merge a new sysinit set into the current set, reallocating it if
119 * necessary. This can only be called after malloc is running.
120 */
121void
dc62b251 122sysinit_add(struct sysinit **set, struct sysinit **set_end)
984263bc
MD
123{
124 struct sysinit **newset;
125 struct sysinit **sipp;
126 struct sysinit **xipp;
dc62b251 127 int count;
984263bc 128
dc62b251 129 count = set_end - set;
984263bc 130 if (newsysinit)
dc62b251 131 count += newsysinit_end - newsysinit;
984263bc 132 else
dc62b251 133 count += sysinit_end - sysinit;
efda3bd0 134 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK);
984263bc 135 xipp = newset;
dc62b251
MD
136 if (newsysinit) {
137 for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
984263bc 138 *xipp++ = *sipp;
dc62b251
MD
139 } else {
140 for (sipp = sysinit; sipp < sysinit_end; sipp++)
984263bc 141 *xipp++ = *sipp;
dc62b251
MD
142 }
143 for (sipp = set; sipp < set_end; sipp++)
984263bc 144 *xipp++ = *sipp;
984263bc 145 if (newsysinit)
efda3bd0 146 kfree(newsysinit, M_TEMP);
984263bc 147 newsysinit = newset;
dc62b251 148 newsysinit_end = newset + count;
984263bc
MD
149}
150
6bf59cd2
MD
151/*
152 * Callbacks from machine-dependant startup code (e.g. init386) to set
153 * up low level entities related to cpu #0's globaldata.
154 *
155 * Called from very low level boot code.
156 */
157void
158mi_proc0init(struct globaldata *gd, struct user *proc0paddr)
159{
160 lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd);
161 lwkt_set_comm(&thread0, "thread0");
3e291793 162 RB_INIT(&proc0.p_lwp_tree);
8f1f6170 163 spin_init(&proc0.p_spin);
3e291793
MD
164 proc0.p_lasttid = 0; /* +1 = next TID */
165 lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0);
08f2f1bb
SS
166 lwp0.lwp_thread = &thread0;
167 lwp0.lwp_proc = &proc0;
6bf59cd2 168 proc0.p_usched = usched_init();
08f2f1bb 169 lwp0.lwp_cpumask = 0xFFFFFFFF;
6bf59cd2
MD
170 varsymset_init(&proc0.p_varsymset, NULL);
171 thread0.td_flags |= TDF_RUNNING;
172 thread0.td_proc = &proc0;
08f2f1bb 173 thread0.td_lwp = &lwp0;
6bf59cd2 174 thread0.td_switch = cpu_heavy_switch; /* YYY eventually LWKT */
6b7dca13 175 lwkt_schedule_self(curthread);
6bf59cd2
MD
176}
177
984263bc
MD
178/*
179 * System startup; initialize the world, create process 0, mount root
180 * filesystem, and fork to create init and pagedaemon. Most of the
181 * hard work is done in the lower-level initialization routines including
182 * startup(), which does memory initialization and autoconfiguration.
183 *
184 * This allows simple addition of new kernel subsystems that require
185 * boot time initialization. It also allows substitution of subsystem
186 * (for instance, a scheduler, kernel profiler, or VM system) by object
187 * module. Finally, it allows for optional "kernel threads".
188 */
189void
190mi_startup(void)
191{
8a8d5d85 192 struct sysinit *sip; /* system initialization*/
17a9f566
MD
193 struct sysinit **sipp; /* system initialization*/
194 struct sysinit **xipp; /* interior loop of sort*/
195 struct sysinit *save; /* bubble*/
984263bc 196
0855a2af
JG
197 //kprintf0("mi_startup\n");
198
dc62b251
MD
199 if (sysinit == NULL) {
200 sysinit = SET_BEGIN(sysinit_set);
201 sysinit_end = SET_LIMIT(sysinit_set);
202 }
203
984263bc
MD
204restart:
205 /*
206 * Perform a bubble sort of the system initialization objects by
207 * their subsystem (primary key) and order (secondary key).
208 */
dc62b251
MD
209 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
210 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
984263bc
MD
211 if ((*sipp)->subsystem < (*xipp)->subsystem ||
212 ((*sipp)->subsystem == (*xipp)->subsystem &&
213 (*sipp)->order <= (*xipp)->order))
214 continue; /* skip*/
215 save = *sipp;
216 *sipp = *xipp;
217 *xipp = save;
218 }
219 }
220
221 /*
222 * Traverse the (now) ordered list of system initialization tasks.
223 * Perform each task, and continue on to the next task.
224 *
225 * The last item on the list is expected to be the scheduler,
226 * which will not return.
227 */
dc62b251
MD
228 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
229 sip = *sipp;
ba39e2e0 230 if (sip->subsystem == SI_SPECIAL_DUMMY)
984263bc
MD
231 continue; /* skip dummy task(s)*/
232
ba39e2e0 233 if (sip->subsystem == SI_SPECIAL_DONE)
984263bc
MD
234 continue;
235
0855a2af
JG
236 //kprintf0("!%s!", sip->name);
237
984263bc 238 /* Call function */
8a8d5d85 239 (*(sip->func))(sip->udata);
984263bc
MD
240
241 /* Check off the one we're just done */
ba39e2e0 242 sip->subsystem = SI_SPECIAL_DONE;
984263bc
MD
243
244 /* Check if we've installed more sysinit items via KLD */
245 if (newsysinit != NULL) {
dc62b251 246 if (sysinit != SET_BEGIN(sysinit_set))
efda3bd0 247 kfree(sysinit, M_TEMP);
984263bc 248 sysinit = newsysinit;
dc62b251 249 sysinit_end = newsysinit_end;
984263bc 250 newsysinit = NULL;
dc62b251 251 newsysinit_end = NULL;
984263bc
MD
252 goto restart;
253 }
254 }
255
256 panic("Shouldn't get here!");
257 /* NOTREACHED*/
258}
259
260
261/*
262 ***************************************************************************
263 ****
264 **** The following SYSINIT's belong elsewhere, but have not yet
265 **** been moved.
266 ****
267 ***************************************************************************
268 */
269static void
270print_caddr_t(void *data __unused)
271{
6ea70f76 272 kprintf("%s", (char *)data);
984263bc 273}
ba39e2e0 274SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
984263bc 275
f8c3996b
MD
276/*
277 * Leave the critical section that protected us from spurious interrupts
278 * so device probes work.
279 */
280static void
281leavecrit(void *dummy __unused)
282{
0b692e79
MD
283 MachIntrABI.finalize();
284 cpu_enable_intr();
285 MachIntrABI.cleanup();
f8c3996b
MD
286 crit_exit();
287 KKASSERT(!IN_CRITICAL_SECT(curthread));
dbcd0c9b 288
f8c3996b 289 if (bootverbose)
6ea70f76 290 kprintf("Leaving critical section, allowing interrupts\n");
f8c3996b 291}
ba39e2e0 292SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL)
984263bc 293
dbcd0c9b
MD
294/*
295 * This is called after the threading system is up and running,
296 * including the softclock, clock interrupts, and SMP.
297 */
298static void
299tsleepworks(void *dummy __unused)
300{
301 tsleep_now_works = 1;
302}
303SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL)
304
305/*
306 * This is called after devices have configured. Tell the kernel we are
307 * no longer in cold boot.
308 */
309static void
310endofcoldboot(void *dummy __unused)
311{
312 cold = 0;
313}
314SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL)
315
984263bc
MD
316/*
317 ***************************************************************************
318 ****
319 **** The two following SYSINT's are proc0 specific glue code. I am not
320 **** convinced that they can not be safely combined, but their order of
321 **** operation has been maintained as the same as the original init_main.c
322 **** for right now.
323 ****
324 **** These probably belong in init_proc.c or kern_proc.c, since they
325 **** deal with proc0 (the fork template process).
326 ****
327 ***************************************************************************
328 */
329/* ARGSUSED*/
330static void
331proc0_init(void *dummy __unused)
332{
0679adc4 333 struct proc *p;
81eea9f4 334 struct lwp *lp;
984263bc
MD
335
336 p = &proc0;
08f2f1bb 337 lp = &lwp0;
984263bc
MD
338
339 /*
340 * Initialize process and pgrp structures.
341 */
342 procinit();
343
984263bc
MD
344 /*
345 * additional VM structures
346 */
347 vm_init2();
348
349 /*
350 * Create process 0 (the swapper).
351 */
352 LIST_INSERT_HEAD(&allproc, p, p_list);
353 p->p_pgrp = &pgrp0;
354 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
355 LIST_INIT(&pgrp0.pg_members);
356 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
357
358 pgrp0.pg_session = &session0;
359 session0.s_count = 1;
360 session0.s_leader = p;
361
362 p->p_sysent = &aout_sysvec;
363
344ad853 364 p->p_flag = P_SYSTEM;
164b8401
SS
365 p->p_stat = SACTIVE;
366 lp->lwp_stat = LSRUN;
984263bc
MD
367 p->p_nice = NZERO;
368 p->p_rtprio.type = RTP_PRIO_NORMAL;
369 p->p_rtprio.prio = 0;
08f2f1bb 370 lp->lwp_rtprio = p->p_rtprio;
984263bc
MD
371
372 p->p_peers = 0;
373 p->p_leader = p;
374
375 bcopy("swapper", p->p_comm, sizeof ("swapper"));
81eea9f4 376 bcopy("swapper", thread0.td_comm, sizeof ("swapper"));
984263bc
MD
377
378 /* Create credentials. */
984263bc 379 p->p_ucred = crget();
41c20dac 380 p->p_ucred->cr_ruidinfo = uifind(0);
984263bc
MD
381 p->p_ucred->cr_ngroups = 1; /* group 0 */
382 p->p_ucred->cr_uidinfo = uifind(0);
383
384 /* Don't jail it */
41c20dac 385 p->p_ucred->cr_prison = NULL;
984263bc 386
b1b4e5a6
SS
387 /* Create sigacts. */
388 p->p_sigacts = &sigacts0;
389 p->p_sigacts->ps_refcnt = 1;
984263bc
MD
390
391 /* Initialize signal state for process 0. */
c0b8a06d 392 siginit(p);
984263bc
MD
393
394 /* Create the file descriptor table. */
228b401d 395 fdinit_bootstrap(p, &filedesc0, cmask);
984263bc
MD
396
397 /* Create the limits structures. */
c0b8a06d 398 plimit_init0(&limit0);
984263bc 399 p->p_limit = &limit0;
984263bc
MD
400
401 /* Allocate a prototype map so we have something to fork. */
402 pmap_pinit0(vmspace_pmap(&vmspace0));
403 p->p_vmspace = &vmspace0;
287ebb09 404 lp->lwp_vmspace = p->p_vmspace;
e3161323 405 sysref_init(&vmspace0.vm_sysref, &vmspace_sysref_class);
e4846942
MD
406 vm_map_init(&vmspace0.vm_map,
407 round_page(VM_MIN_USER_ADDRESS),
408 trunc_page(VM_MAX_USER_ADDRESS),
409 vmspace_pmap(&vmspace0));
e3161323 410 sysref_activate(&vmspace0.vm_sysref);
984263bc 411
984263bc
MD
412 /*
413 * Charge root for one process.
414 */
41c20dac 415 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0);
ba39e2e0 416 vm_init_limits(p);
984263bc 417}
ba39e2e0 418SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL)
984263bc 419
8fa76237
MD
420static int proc0_post_callback(struct proc *p, void *data __unused);
421
984263bc
MD
422/* ARGSUSED*/
423static void
424proc0_post(void *dummy __unused)
425{
426 struct timespec ts;
984263bc
MD
427
428 /*
429 * Now we can look at the time, having had a chance to verify the
430 * time from the file system. Pretend that proc0 started now.
431 */
8fa76237 432 allproc_scan(proc0_post_callback, NULL);
984263bc
MD
433
434 /*
435 * Give the ``random'' number generator a thump.
436 * XXX: Does read_random() contain enough bits to be used here ?
437 */
438 nanotime(&ts);
cddfb7bb 439 skrandom(ts.tv_sec ^ ts.tv_nsec);
984263bc 440}
8fa76237
MD
441
442static int
443proc0_post_callback(struct proc *p, void *data __unused)
444{
445 microtime(&p->p_start);
446 return(0);
447}
448
ba39e2e0 449SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL)
984263bc
MD
450
451/*
452 ***************************************************************************
453 ****
454 **** The following SYSINIT's and glue code should be moved to the
455 **** respective files on a per subsystem basis.
456 ****
457 ***************************************************************************
458 */
459
460
461/*
462 ***************************************************************************
463 ****
464 **** The following code probably belongs in another file, like
465 **** kern/init_init.c.
466 ****
467 ***************************************************************************
468 */
469
470/*
471 * List of paths to try when searching for "init".
472 */
473static char init_path[MAXPATHLEN] =
474#ifdef INIT_PATH
475 __XSTRING(INIT_PATH);
476#else
22628b14 477 "/sbin/init:/sbin/oinit:/sbin/init.bak";
984263bc
MD
478#endif
479SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
480
481/*
482 * Start the initial user process; try exec'ing each pathname in init_path.
483 * The program is invoked with one argument containing the boot flags.
8a8d5d85
MD
484 *
485 * The MP lock is held on entry.
984263bc
MD
486 */
487static void
91bd9c1e 488start_init(void *dummy, struct trapframe *frame)
984263bc
MD
489{
490 vm_offset_t addr;
491 struct execve_args args;
492 int options, error;
493 char *var, *path, *next, *s;
494 char *ucp, **uap, *arg0, *arg1;
495 struct proc *p;
553ea3c8 496 struct lwp *lp;
21739618
MD
497 struct mount *mp;
498 struct vnode *vp;
984263bc
MD
499
500 p = curproc;
501
08f2f1bb 502 lp = ONLY_LWP_IN_PROC(p);
553ea3c8 503
984263bc 504 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
861905fb 505 mp = mountlist_boot_getfirst();
21739618 506 if (VFS_ROOT(mp, &vp))
984263bc 507 panic("cannot find root vnode");
28623bf9
MD
508 if (mp->mnt_ncmountpt.ncp == NULL) {
509 cache_allocroot(&mp->mnt_ncmountpt, mp, vp);
510 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */
8c361dda 511 }
21739618 512 p->p_fd->fd_cdir = vp;
597aea93 513 vref(p->p_fd->fd_cdir);
21739618 514 p->p_fd->fd_rdir = vp;
597aea93 515 vref(p->p_fd->fd_rdir);
28623bf9 516 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt));
a11aaa81 517 vn_unlock(vp); /* leave ref intact */
28623bf9
MD
518 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir);
519 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir);
984263bc
MD
520
521 /*
522 * Need just enough stack to hold the faked-up "execve()" arguments.
523 */
524 addr = trunc_page(USRSTACK - PAGE_SIZE);
1b874851
MD
525 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
526 FALSE,
527 VM_MAPTYPE_NORMAL,
528 VM_PROT_ALL, VM_PROT_ALL,
529 0);
530 if (error)
984263bc
MD
531 panic("init: couldn't allocate argument space");
532 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
533 p->p_vmspace->vm_ssize = 1;
534
bc01a404 535 if ((var = kgetenv("init_path")) != NULL) {
984263bc
MD
536 strncpy(init_path, var, sizeof init_path);
537 init_path[sizeof init_path - 1] = 0;
538 }
bc01a404 539 if ((var = kgetenv("kern.fallback_elf_brand")) != NULL)
984263bc
MD
540 fallback_elf_brand = strtol(var, NULL, 0);
541
542 for (path = init_path; *path != '\0'; path = next) {
543 while (*path == ':')
544 path++;
545 if (*path == '\0')
546 break;
547 for (next = path; *next != '\0' && *next != ':'; next++)
548 /* nothing */ ;
549 if (bootverbose)
6ea70f76 550 kprintf("start_init: trying %.*s\n", (int)(next - path),
984263bc
MD
551 path);
552
553 /*
554 * Move out the boot flag argument.
555 */
556 options = 0;
557 ucp = (char *)USRSTACK;
558 (void)subyte(--ucp, 0); /* trailing zero */
559 if (boothowto & RB_SINGLE) {
560 (void)subyte(--ucp, 's');
561 options = 1;
562 }
563#ifdef notyet
564 if (boothowto & RB_FASTBOOT) {
565 (void)subyte(--ucp, 'f');
566 options = 1;
567 }
568#endif
569
570#ifdef BOOTCDROM
571 (void)subyte(--ucp, 'C');
572 options = 1;
573#endif
574 if (options == 0)
575 (void)subyte(--ucp, '-');
576 (void)subyte(--ucp, '-'); /* leading hyphen */
577 arg1 = ucp;
578
579 /*
580 * Move out the file name (also arg 0).
581 */
582 (void)subyte(--ucp, 0);
583 for (s = next - 1; s >= path; s--)
584 (void)subyte(--ucp, *s);
585 arg0 = ucp;
586
587 /*
588 * Move out the arg pointers.
589 */
590 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
591 (void)suword((caddr_t)--uap, (long)0); /* terminator */
592 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
593 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
594
595 /*
596 * Point at the arguments.
597 */
598 args.fname = arg0;
599 args.argv = uap;
600 args.envv = NULL;
601
602 /*
603 * Now try to exec the program. If can't for any reason
604 * other than it doesn't exist, complain.
605 *
606 * Otherwise, return via fork_trampoline() all the way
607 * to user mode as init!
a2a5ad0d
MD
608 *
609 * WARNING! We may have been moved to another cpu after
0a3f9b47
MD
610 * acquiring the current user process designation. The
611 * MP lock will migrate with us though so we still have to
612 * release it.
984263bc 613 */
753fd850 614 if ((error = sys_execve(&args)) == 0) {
8a8d5d85 615 rel_mplock();
52eedfb5 616 lp->lwp_proc->p_usched->acquire_curproc(lp);
984263bc 617 return;
8a8d5d85 618 }
984263bc 619 if (error != ENOENT)
6ea70f76 620 kprintf("exec %.*s: error %d\n", (int)(next - path),
984263bc
MD
621 path, error);
622 }
6ea70f76 623 kprintf("init: not found in path %s\n", init_path);
984263bc
MD
624 panic("no init");
625}
626
627/*
628 * Like kthread_create(), but runs in it's own address space.
629 * We do this early to reserve pid 1.
630 *
631 * Note special case - do not make it runnable yet. Other work
632 * in progress will change this more.
633 */
634static void
635create_init(const void *udata __unused)
636{
637 int error;
bb3cd951 638 struct lwp *lp;
984263bc 639
e43a034f 640 crit_enter();
08f2f1bb 641 error = fork1(&lwp0, RFFDG | RFPROC, &initproc);
984263bc 642 if (error)
fc92d4aa 643 panic("cannot fork init: %d", error);
344ad853 644 initproc->p_flag |= P_SYSTEM;
08f2f1bb 645 lp = ONLY_LWP_IN_PROC(initproc);
bb3cd951 646 cpu_set_fork_handler(lp, start_init, NULL);
e43a034f 647 crit_exit();
984263bc 648}
ba39e2e0 649SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
984263bc
MD
650
651/*
652 * Make it runnable now.
653 */
654static void
655kick_init(const void *udata __unused)
656{
08f2f1bb 657 start_forked_proc(&lwp0, initproc);
984263bc 658}
ba39e2e0 659SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
8ad65e08
MD
660
661/*
662 * Machine independant globaldata initialization
73e4f7b9
MD
663 *
664 * WARNING! Called from early boot, 'mycpu' may not work yet.
8ad65e08
MD
665 */
666void
d0e06f83 667mi_gdinit(struct globaldata *gd, int cpuid)
8ad65e08 668{
88c4d2f6 669 TAILQ_INIT(&gd->gd_systimerq);
e3161323 670 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */
d0e06f83 671 gd->gd_cpuid = cpuid;
fda1ad89 672 gd->gd_cpumask = (cpumask_t)1 << cpuid;
8ad65e08 673 lwkt_gdinit(gd);
41a01a4d 674 vm_map_entry_reserve_cpu_init(gd);
fc17ad60 675 sleep_gdinit(gd);
8ad65e08
MD
676}
677