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>
| 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>
|
64#include <sys/resourcevar.h>
65#include <sys/systm.h>
66#include <sys/signalvar.h>
67#include <sys/vnode.h>
68#include <sys/sysent.h>
69#include <sys/reboot.h>
70#include <sys/sched.h>
71#include <sys/sx.h>
72#include <sys/sysproto.h>
73#include <sys/vmmeter.h>
74#include <sys/unistd.h>
75#include <sys/malloc.h>
76#include <sys/conf.h>
77#include <sys/cpuset.h>
78
79#include <machine/cpu.h>
80
81#include <security/audit/audit.h>
82#include <security/mac/mac_framework.h>
83
84#include <vm/vm.h>
85#include <vm/vm_param.h>
86#include <vm/pmap.h>
87#include <vm/vm_map.h>
88#include <sys/copyright.h>
89
90#include <ddb/ddb.h>
91#include <ddb/db_sym.h>
92
93void mi_startup(void); /* Should be elsewhere */
94
95/* Components of the first process -- never freed. */
96static struct session session0;
97static struct pgrp pgrp0;
98struct proc proc0;
99struct thread thread0 __aligned(16);
100struct vmspace vmspace0;
101struct proc *initproc;
102
103int boothowto = 0; /* initialized so that it can be patched */
104SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0,
105 "Boot control flags, passed from loader");
106int bootverbose;
107SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0,
108 "Control the output of verbose kernel messages");
109
110/*
111 * This ensures that there is at least one entry so that the sysinit_set
112 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
113 * executed.
114 */
115SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL);
116
117/*
118 * The sysinit table itself. Items are checked off as the are run.
119 * If we want to register new sysinit types, add them to newsysinit.
120 */
121SET_DECLARE(sysinit_set, struct sysinit);
122struct sysinit **sysinit, **sysinit_end;
123struct sysinit **newsysinit, **newsysinit_end;
124
125/*
126 * Merge a new sysinit set into the current set, reallocating it if
127 * necessary. This can only be called after malloc is running.
128 */
129void
130sysinit_add(struct sysinit **set, struct sysinit **set_end)
131{
132 struct sysinit **newset;
133 struct sysinit **sipp;
134 struct sysinit **xipp;
135 int count;
136
137 count = set_end - set;
138 if (newsysinit)
139 count += newsysinit_end - newsysinit;
140 else
141 count += sysinit_end - sysinit;
142 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
143 if (newset == NULL)
144 panic("cannot malloc for sysinit");
145 xipp = newset;
146 if (newsysinit)
147 for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
148 *xipp++ = *sipp;
149 else
150 for (sipp = sysinit; sipp < sysinit_end; sipp++)
151 *xipp++ = *sipp;
152 for (sipp = set; sipp < set_end; sipp++)
153 *xipp++ = *sipp;
154 if (newsysinit)
155 free(newsysinit, M_TEMP);
156 newsysinit = newset;
157 newsysinit_end = newset + count;
158}
159
160/*
161 * System startup; initialize the world, create process 0, mount root
162 * filesystem, and fork to create init and pagedaemon. Most of the
163 * hard work is done in the lower-level initialization routines including
164 * startup(), which does memory initialization and autoconfiguration.
165 *
166 * This allows simple addition of new kernel subsystems that require
167 * boot time initialization. It also allows substitution of subsystem
168 * (for instance, a scheduler, kernel profiler, or VM system) by object
169 * module. Finally, it allows for optional "kernel threads".
170 */
171void
172mi_startup(void)
173{
174
175 register struct sysinit **sipp; /* system initialization*/
176 register struct sysinit **xipp; /* interior loop of sort*/
177 register struct sysinit *save; /* bubble*/
178
179#if defined(VERBOSE_SYSINIT)
180 int last;
181 int verbose;
182#endif
183
184 if (boothowto & RB_VERBOSE)
185 bootverbose++;
186
187 if (sysinit == NULL) {
188 sysinit = SET_BEGIN(sysinit_set);
189 sysinit_end = SET_LIMIT(sysinit_set);
190 }
191
192restart:
193 /*
194 * Perform a bubble sort of the system initialization objects by
195 * their subsystem (primary key) and order (secondary key).
196 */
197 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
198 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
199 if ((*sipp)->subsystem < (*xipp)->subsystem ||
200 ((*sipp)->subsystem == (*xipp)->subsystem &&
201 (*sipp)->order <= (*xipp)->order))
202 continue; /* skip*/
203 save = *sipp;
204 *sipp = *xipp;
205 *xipp = save;
206 }
207 }
208
209#if defined(VERBOSE_SYSINIT)
210 last = SI_SUB_COPYRIGHT;
211 verbose = 0;
212#if !defined(DDB)
213 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n");
214#endif
215#endif
216
217 /*
218 * Traverse the (now) ordered list of system initialization tasks.
219 * Perform each task, and continue on to the next task.
220 *
221 * The last item on the list is expected to be the scheduler,
222 * which will not return.
223 */
224 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
225
226 if ((*sipp)->subsystem == SI_SUB_DUMMY)
227 continue; /* skip dummy task(s)*/
228
229 if ((*sipp)->subsystem == SI_SUB_DONE)
230 continue;
231
232#if defined(VERBOSE_SYSINIT)
233 if ((*sipp)->subsystem > last) {
234 verbose = 1;
235 last = (*sipp)->subsystem;
236 printf("subsystem %x\n", last);
237 }
238 if (verbose) {
239#if defined(DDB)
240 const char *name;
241 c_db_sym_t sym;
242 db_expr_t offset;
243
244 sym = db_search_symbol((vm_offset_t)(*sipp)->func,
245 DB_STGY_PROC, &offset);
246 db_symbol_values(sym, &name, NULL);
247 if (name != NULL)
248 printf(" %s(%p)... ", name, (*sipp)->udata);
249 else
250#endif
251 printf(" %p(%p)... ", (*sipp)->func,
252 (*sipp)->udata);
253 }
254#endif
255
256 /* Call function */
257 (*((*sipp)->func))((*sipp)->udata);
258
259#if defined(VERBOSE_SYSINIT)
260 if (verbose)
261 printf("done.\n");
262#endif
263
264 /* Check off the one we're just done */
265 (*sipp)->subsystem = SI_SUB_DONE;
266
267 /* Check if we've installed more sysinit items via KLD */
268 if (newsysinit != NULL) {
269 if (sysinit != SET_BEGIN(sysinit_set))
270 free(sysinit, M_TEMP);
271 sysinit = newsysinit;
272 sysinit_end = newsysinit_end;
273 newsysinit = NULL;
274 newsysinit_end = NULL;
275 goto restart;
276 }
277 }
278
279 panic("Shouldn't get here!");
280 /* NOTREACHED*/
281}
282
283
284/*
285 ***************************************************************************
286 ****
287 **** The following SYSINIT's belong elsewhere, but have not yet
288 **** been moved.
289 ****
290 ***************************************************************************
291 */
292static void
293print_caddr_t(void *data)
294{
295 printf("%s", (char *)data);
296}
297
298static void
299print_version(void *data __unused)
300{
301 int len;
302
303 /* Strip a trailing newline from version. */
304 len = strlen(version);
305 while (len > 0 && version[len - 1] == '\n')
306 len--;
307 printf("%.*s %s\n", len, version, machine);
308}
309
310SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t,
311 copyright);
312SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t,
313 trademark);
314SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL);
315
316#ifdef WITNESS
317static char wit_warn[] =
318 "WARNING: WITNESS option enabled, expect reduced performance.\n";
319SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 1,
320 print_caddr_t, wit_warn);
321SYSINIT(witwarn2, SI_SUB_RUN_SCHEDULER, SI_ORDER_THIRD + 1,
322 print_caddr_t, wit_warn);
323#endif
324
325#ifdef DIAGNOSTIC
326static char diag_warn[] =
327 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n";
328SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 2,
329 print_caddr_t, diag_warn);
330SYSINIT(diagwarn2, SI_SUB_RUN_SCHEDULER, SI_ORDER_THIRD + 2,
331 print_caddr_t, diag_warn);
332#endif
333
334static int
335null_fetch_syscall_args(struct thread *td __unused,
336 struct syscall_args *sa __unused)
337{
338
339 panic("null_fetch_syscall_args");
340}
341
342static void
343null_set_syscall_retval(struct thread *td __unused, int error __unused)
344{
345
346 panic("null_set_syscall_retval");
347}
348
349struct sysentvec null_sysvec = {
350 .sv_size = 0,
351 .sv_table = NULL,
352 .sv_mask = 0,
353 .sv_sigsize = 0,
354 .sv_sigtbl = NULL,
355 .sv_errsize = 0,
356 .sv_errtbl = NULL,
357 .sv_transtrap = NULL,
358 .sv_fixup = NULL,
359 .sv_sendsig = NULL,
360 .sv_sigcode = NULL,
361 .sv_szsigcode = NULL,
362 .sv_prepsyscall = NULL,
363 .sv_name = "null",
364 .sv_coredump = NULL,
365 .sv_imgact_try = NULL,
366 .sv_minsigstksz = 0,
367 .sv_pagesize = PAGE_SIZE,
368 .sv_minuser = VM_MIN_ADDRESS,
369 .sv_maxuser = VM_MAXUSER_ADDRESS,
370 .sv_usrstack = USRSTACK,
371 .sv_psstrings = PS_STRINGS,
372 .sv_stackprot = VM_PROT_ALL,
373 .sv_copyout_strings = NULL,
374 .sv_setregs = NULL,
375 .sv_fixlimit = NULL,
376 .sv_maxssiz = NULL,
377 .sv_flags = 0,
378 .sv_set_syscall_retval = null_set_syscall_retval,
379 .sv_fetch_syscall_args = null_fetch_syscall_args,
380 .sv_syscallnames = NULL,
381 .sv_schedtail = NULL,
382};
383
384/*
385 ***************************************************************************
386 ****
387 **** The two following SYSINIT's are proc0 specific glue code. I am not
388 **** convinced that they can not be safely combined, but their order of
389 **** operation has been maintained as the same as the original init_main.c
390 **** for right now.
391 ****
392 **** These probably belong in init_proc.c or kern_proc.c, since they
393 **** deal with proc0 (the fork template process).
394 ****
395 ***************************************************************************
396 */
397/* ARGSUSED*/
398static void
399proc0_init(void *dummy __unused)
400{
401 struct proc *p;
402 struct thread *td;
403 vm_paddr_t pageablemem;
404 int i;
405
406 GIANT_REQUIRED;
407 p = &proc0;
408 td = &thread0;
409
410 /*
411 * Initialize magic number and osrel.
412 */
413 p->p_magic = P_MAGIC;
414 p->p_osrel = osreldate;
415
416 /*
417 * Initialize thread and process structures.
418 */
419 procinit(); /* set up proc zone */
420 threadinit(); /* set up UMA zones */
421
422 /*
423 * Initialise scheduler resources.
424 * Add scheduler specific parts to proc, thread as needed.
425 */
426 schedinit(); /* scheduler gets its house in order */
427 /*
428 * Initialize sleep queue hash table
429 */
430 sleepinit();
431
432 /*
433 * additional VM structures
434 */
435 vm_init2();
436
437 /*
438 * Create process 0 (the swapper).
439 */
440 LIST_INSERT_HEAD(&allproc, p, p_list);
441 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash);
442 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
443 p->p_pgrp = &pgrp0;
444 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
445 LIST_INIT(&pgrp0.pg_members);
446 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
447
448 pgrp0.pg_session = &session0;
449 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF);
450 refcount_init(&session0.s_count, 1);
451 session0.s_leader = p;
452
453 p->p_sysent = &null_sysvec;
454 p->p_flag = P_SYSTEM | P_INMEM;
455 p->p_state = PRS_NORMAL;
456 knlist_init_mtx(&p->p_klist, &p->p_mtx);
457 STAILQ_INIT(&p->p_ktr);
458 p->p_nice = NZERO;
459 td->td_tid = PID_MAX + 1;
460 LIST_INSERT_HEAD(TIDHASH(td->td_tid), td, td_hash);
461 td->td_state = TDS_RUNNING;
462 td->td_pri_class = PRI_TIMESHARE;
463 td->td_user_pri = PUSER;
464 td->td_base_user_pri = PUSER;
465 td->td_lend_user_pri = PRI_MAX;
466 td->td_priority = PVM;
467 td->td_base_pri = PVM;
468 td->td_oncpu = 0;
469 td->td_flags = TDF_INMEM|TDP_KTHREAD;
470 td->td_cpuset = cpuset_thread0();
471 prison0.pr_cpuset = cpuset_ref(td->td_cpuset);
472 p->p_peers = 0;
473 p->p_leader = p;
474
475
476 strncpy(p->p_comm, "kernel", sizeof (p->p_comm));
477 strncpy(td->td_name, "swapper", sizeof (td->td_name));
478
479 callout_init(&p->p_itcallout, CALLOUT_MPSAFE);
480 callout_init_mtx(&p->p_limco, &p->p_mtx, 0);
481 callout_init(&td->td_slpcallout, CALLOUT_MPSAFE);
482
483 /* Create credentials. */
484 p->p_ucred = crget();
485 p->p_ucred->cr_ngroups = 1; /* group 0 */
486 p->p_ucred->cr_uidinfo = uifind(0);
487 p->p_ucred->cr_ruidinfo = uifind(0);
488 p->p_ucred->cr_prison = &prison0;
489 p->p_ucred->cr_loginclass = loginclass_find("default");
490#ifdef AUDIT
491 audit_cred_kproc0(p->p_ucred);
492#endif
493#ifdef MAC
494 mac_cred_create_swapper(p->p_ucred);
495#endif
496 td->td_ucred = crhold(p->p_ucred);
497
498 /* Create sigacts. */
499 p->p_sigacts = sigacts_alloc();
500
501 /* Initialize signal state for process 0. */
502 siginit(&proc0);
503
504 /* Create the file descriptor table. */
505 p->p_fd = fdinit(NULL);
506 p->p_fdtol = NULL;
507
508 /* Create the limits structures. */
509 p->p_limit = lim_alloc();
510 for (i = 0; i < RLIM_NLIMITS; i++)
511 p->p_limit->pl_rlimit[i].rlim_cur =
512 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY;
513 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur =
514 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
515 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur =
516 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
517 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz;
518 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz;
519 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz;
520 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz;
521 /* Cast to avoid overflow on i386/PAE. */
522 pageablemem = ptoa((vm_paddr_t)cnt.v_free_count);
523 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur =
524 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem;
525 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3;
526 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem;
527 p->p_cpulimit = RLIM_INFINITY;
528
| 65#include <sys/resourcevar.h>
66#include <sys/systm.h>
67#include <sys/signalvar.h>
68#include <sys/vnode.h>
69#include <sys/sysent.h>
70#include <sys/reboot.h>
71#include <sys/sched.h>
72#include <sys/sx.h>
73#include <sys/sysproto.h>
74#include <sys/vmmeter.h>
75#include <sys/unistd.h>
76#include <sys/malloc.h>
77#include <sys/conf.h>
78#include <sys/cpuset.h>
79
80#include <machine/cpu.h>
81
82#include <security/audit/audit.h>
83#include <security/mac/mac_framework.h>
84
85#include <vm/vm.h>
86#include <vm/vm_param.h>
87#include <vm/pmap.h>
88#include <vm/vm_map.h>
89#include <sys/copyright.h>
90
91#include <ddb/ddb.h>
92#include <ddb/db_sym.h>
93
94void mi_startup(void); /* Should be elsewhere */
95
96/* Components of the first process -- never freed. */
97static struct session session0;
98static struct pgrp pgrp0;
99struct proc proc0;
100struct thread thread0 __aligned(16);
101struct vmspace vmspace0;
102struct proc *initproc;
103
104int boothowto = 0; /* initialized so that it can be patched */
105SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0,
106 "Boot control flags, passed from loader");
107int bootverbose;
108SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0,
109 "Control the output of verbose kernel messages");
110
111/*
112 * This ensures that there is at least one entry so that the sysinit_set
113 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
114 * executed.
115 */
116SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL);
117
118/*
119 * The sysinit table itself. Items are checked off as the are run.
120 * If we want to register new sysinit types, add them to newsysinit.
121 */
122SET_DECLARE(sysinit_set, struct sysinit);
123struct sysinit **sysinit, **sysinit_end;
124struct sysinit **newsysinit, **newsysinit_end;
125
126/*
127 * Merge a new sysinit set into the current set, reallocating it if
128 * necessary. This can only be called after malloc is running.
129 */
130void
131sysinit_add(struct sysinit **set, struct sysinit **set_end)
132{
133 struct sysinit **newset;
134 struct sysinit **sipp;
135 struct sysinit **xipp;
136 int count;
137
138 count = set_end - set;
139 if (newsysinit)
140 count += newsysinit_end - newsysinit;
141 else
142 count += sysinit_end - sysinit;
143 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
144 if (newset == NULL)
145 panic("cannot malloc for sysinit");
146 xipp = newset;
147 if (newsysinit)
148 for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
149 *xipp++ = *sipp;
150 else
151 for (sipp = sysinit; sipp < sysinit_end; sipp++)
152 *xipp++ = *sipp;
153 for (sipp = set; sipp < set_end; sipp++)
154 *xipp++ = *sipp;
155 if (newsysinit)
156 free(newsysinit, M_TEMP);
157 newsysinit = newset;
158 newsysinit_end = newset + count;
159}
160
161/*
162 * System startup; initialize the world, create process 0, mount root
163 * filesystem, and fork to create init and pagedaemon. Most of the
164 * hard work is done in the lower-level initialization routines including
165 * startup(), which does memory initialization and autoconfiguration.
166 *
167 * This allows simple addition of new kernel subsystems that require
168 * boot time initialization. It also allows substitution of subsystem
169 * (for instance, a scheduler, kernel profiler, or VM system) by object
170 * module. Finally, it allows for optional "kernel threads".
171 */
172void
173mi_startup(void)
174{
175
176 register struct sysinit **sipp; /* system initialization*/
177 register struct sysinit **xipp; /* interior loop of sort*/
178 register struct sysinit *save; /* bubble*/
179
180#if defined(VERBOSE_SYSINIT)
181 int last;
182 int verbose;
183#endif
184
185 if (boothowto & RB_VERBOSE)
186 bootverbose++;
187
188 if (sysinit == NULL) {
189 sysinit = SET_BEGIN(sysinit_set);
190 sysinit_end = SET_LIMIT(sysinit_set);
191 }
192
193restart:
194 /*
195 * Perform a bubble sort of the system initialization objects by
196 * their subsystem (primary key) and order (secondary key).
197 */
198 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
199 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
200 if ((*sipp)->subsystem < (*xipp)->subsystem ||
201 ((*sipp)->subsystem == (*xipp)->subsystem &&
202 (*sipp)->order <= (*xipp)->order))
203 continue; /* skip*/
204 save = *sipp;
205 *sipp = *xipp;
206 *xipp = save;
207 }
208 }
209
210#if defined(VERBOSE_SYSINIT)
211 last = SI_SUB_COPYRIGHT;
212 verbose = 0;
213#if !defined(DDB)
214 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n");
215#endif
216#endif
217
218 /*
219 * Traverse the (now) ordered list of system initialization tasks.
220 * Perform each task, and continue on to the next task.
221 *
222 * The last item on the list is expected to be the scheduler,
223 * which will not return.
224 */
225 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
226
227 if ((*sipp)->subsystem == SI_SUB_DUMMY)
228 continue; /* skip dummy task(s)*/
229
230 if ((*sipp)->subsystem == SI_SUB_DONE)
231 continue;
232
233#if defined(VERBOSE_SYSINIT)
234 if ((*sipp)->subsystem > last) {
235 verbose = 1;
236 last = (*sipp)->subsystem;
237 printf("subsystem %x\n", last);
238 }
239 if (verbose) {
240#if defined(DDB)
241 const char *name;
242 c_db_sym_t sym;
243 db_expr_t offset;
244
245 sym = db_search_symbol((vm_offset_t)(*sipp)->func,
246 DB_STGY_PROC, &offset);
247 db_symbol_values(sym, &name, NULL);
248 if (name != NULL)
249 printf(" %s(%p)... ", name, (*sipp)->udata);
250 else
251#endif
252 printf(" %p(%p)... ", (*sipp)->func,
253 (*sipp)->udata);
254 }
255#endif
256
257 /* Call function */
258 (*((*sipp)->func))((*sipp)->udata);
259
260#if defined(VERBOSE_SYSINIT)
261 if (verbose)
262 printf("done.\n");
263#endif
264
265 /* Check off the one we're just done */
266 (*sipp)->subsystem = SI_SUB_DONE;
267
268 /* Check if we've installed more sysinit items via KLD */
269 if (newsysinit != NULL) {
270 if (sysinit != SET_BEGIN(sysinit_set))
271 free(sysinit, M_TEMP);
272 sysinit = newsysinit;
273 sysinit_end = newsysinit_end;
274 newsysinit = NULL;
275 newsysinit_end = NULL;
276 goto restart;
277 }
278 }
279
280 panic("Shouldn't get here!");
281 /* NOTREACHED*/
282}
283
284
285/*
286 ***************************************************************************
287 ****
288 **** The following SYSINIT's belong elsewhere, but have not yet
289 **** been moved.
290 ****
291 ***************************************************************************
292 */
293static void
294print_caddr_t(void *data)
295{
296 printf("%s", (char *)data);
297}
298
299static void
300print_version(void *data __unused)
301{
302 int len;
303
304 /* Strip a trailing newline from version. */
305 len = strlen(version);
306 while (len > 0 && version[len - 1] == '\n')
307 len--;
308 printf("%.*s %s\n", len, version, machine);
309}
310
311SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t,
312 copyright);
313SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t,
314 trademark);
315SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL);
316
317#ifdef WITNESS
318static char wit_warn[] =
319 "WARNING: WITNESS option enabled, expect reduced performance.\n";
320SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 1,
321 print_caddr_t, wit_warn);
322SYSINIT(witwarn2, SI_SUB_RUN_SCHEDULER, SI_ORDER_THIRD + 1,
323 print_caddr_t, wit_warn);
324#endif
325
326#ifdef DIAGNOSTIC
327static char diag_warn[] =
328 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n";
329SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 2,
330 print_caddr_t, diag_warn);
331SYSINIT(diagwarn2, SI_SUB_RUN_SCHEDULER, SI_ORDER_THIRD + 2,
332 print_caddr_t, diag_warn);
333#endif
334
335static int
336null_fetch_syscall_args(struct thread *td __unused,
337 struct syscall_args *sa __unused)
338{
339
340 panic("null_fetch_syscall_args");
341}
342
343static void
344null_set_syscall_retval(struct thread *td __unused, int error __unused)
345{
346
347 panic("null_set_syscall_retval");
348}
349
350struct sysentvec null_sysvec = {
351 .sv_size = 0,
352 .sv_table = NULL,
353 .sv_mask = 0,
354 .sv_sigsize = 0,
355 .sv_sigtbl = NULL,
356 .sv_errsize = 0,
357 .sv_errtbl = NULL,
358 .sv_transtrap = NULL,
359 .sv_fixup = NULL,
360 .sv_sendsig = NULL,
361 .sv_sigcode = NULL,
362 .sv_szsigcode = NULL,
363 .sv_prepsyscall = NULL,
364 .sv_name = "null",
365 .sv_coredump = NULL,
366 .sv_imgact_try = NULL,
367 .sv_minsigstksz = 0,
368 .sv_pagesize = PAGE_SIZE,
369 .sv_minuser = VM_MIN_ADDRESS,
370 .sv_maxuser = VM_MAXUSER_ADDRESS,
371 .sv_usrstack = USRSTACK,
372 .sv_psstrings = PS_STRINGS,
373 .sv_stackprot = VM_PROT_ALL,
374 .sv_copyout_strings = NULL,
375 .sv_setregs = NULL,
376 .sv_fixlimit = NULL,
377 .sv_maxssiz = NULL,
378 .sv_flags = 0,
379 .sv_set_syscall_retval = null_set_syscall_retval,
380 .sv_fetch_syscall_args = null_fetch_syscall_args,
381 .sv_syscallnames = NULL,
382 .sv_schedtail = NULL,
383};
384
385/*
386 ***************************************************************************
387 ****
388 **** The two following SYSINIT's are proc0 specific glue code. I am not
389 **** convinced that they can not be safely combined, but their order of
390 **** operation has been maintained as the same as the original init_main.c
391 **** for right now.
392 ****
393 **** These probably belong in init_proc.c or kern_proc.c, since they
394 **** deal with proc0 (the fork template process).
395 ****
396 ***************************************************************************
397 */
398/* ARGSUSED*/
399static void
400proc0_init(void *dummy __unused)
401{
402 struct proc *p;
403 struct thread *td;
404 vm_paddr_t pageablemem;
405 int i;
406
407 GIANT_REQUIRED;
408 p = &proc0;
409 td = &thread0;
410
411 /*
412 * Initialize magic number and osrel.
413 */
414 p->p_magic = P_MAGIC;
415 p->p_osrel = osreldate;
416
417 /*
418 * Initialize thread and process structures.
419 */
420 procinit(); /* set up proc zone */
421 threadinit(); /* set up UMA zones */
422
423 /*
424 * Initialise scheduler resources.
425 * Add scheduler specific parts to proc, thread as needed.
426 */
427 schedinit(); /* scheduler gets its house in order */
428 /*
429 * Initialize sleep queue hash table
430 */
431 sleepinit();
432
433 /*
434 * additional VM structures
435 */
436 vm_init2();
437
438 /*
439 * Create process 0 (the swapper).
440 */
441 LIST_INSERT_HEAD(&allproc, p, p_list);
442 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash);
443 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
444 p->p_pgrp = &pgrp0;
445 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
446 LIST_INIT(&pgrp0.pg_members);
447 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
448
449 pgrp0.pg_session = &session0;
450 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF);
451 refcount_init(&session0.s_count, 1);
452 session0.s_leader = p;
453
454 p->p_sysent = &null_sysvec;
455 p->p_flag = P_SYSTEM | P_INMEM;
456 p->p_state = PRS_NORMAL;
457 knlist_init_mtx(&p->p_klist, &p->p_mtx);
458 STAILQ_INIT(&p->p_ktr);
459 p->p_nice = NZERO;
460 td->td_tid = PID_MAX + 1;
461 LIST_INSERT_HEAD(TIDHASH(td->td_tid), td, td_hash);
462 td->td_state = TDS_RUNNING;
463 td->td_pri_class = PRI_TIMESHARE;
464 td->td_user_pri = PUSER;
465 td->td_base_user_pri = PUSER;
466 td->td_lend_user_pri = PRI_MAX;
467 td->td_priority = PVM;
468 td->td_base_pri = PVM;
469 td->td_oncpu = 0;
470 td->td_flags = TDF_INMEM|TDP_KTHREAD;
471 td->td_cpuset = cpuset_thread0();
472 prison0.pr_cpuset = cpuset_ref(td->td_cpuset);
473 p->p_peers = 0;
474 p->p_leader = p;
475
476
477 strncpy(p->p_comm, "kernel", sizeof (p->p_comm));
478 strncpy(td->td_name, "swapper", sizeof (td->td_name));
479
480 callout_init(&p->p_itcallout, CALLOUT_MPSAFE);
481 callout_init_mtx(&p->p_limco, &p->p_mtx, 0);
482 callout_init(&td->td_slpcallout, CALLOUT_MPSAFE);
483
484 /* Create credentials. */
485 p->p_ucred = crget();
486 p->p_ucred->cr_ngroups = 1; /* group 0 */
487 p->p_ucred->cr_uidinfo = uifind(0);
488 p->p_ucred->cr_ruidinfo = uifind(0);
489 p->p_ucred->cr_prison = &prison0;
490 p->p_ucred->cr_loginclass = loginclass_find("default");
491#ifdef AUDIT
492 audit_cred_kproc0(p->p_ucred);
493#endif
494#ifdef MAC
495 mac_cred_create_swapper(p->p_ucred);
496#endif
497 td->td_ucred = crhold(p->p_ucred);
498
499 /* Create sigacts. */
500 p->p_sigacts = sigacts_alloc();
501
502 /* Initialize signal state for process 0. */
503 siginit(&proc0);
504
505 /* Create the file descriptor table. */
506 p->p_fd = fdinit(NULL);
507 p->p_fdtol = NULL;
508
509 /* Create the limits structures. */
510 p->p_limit = lim_alloc();
511 for (i = 0; i < RLIM_NLIMITS; i++)
512 p->p_limit->pl_rlimit[i].rlim_cur =
513 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY;
514 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur =
515 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
516 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur =
517 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
518 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz;
519 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz;
520 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz;
521 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz;
522 /* Cast to avoid overflow on i386/PAE. */
523 pageablemem = ptoa((vm_paddr_t)cnt.v_free_count);
524 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur =
525 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem;
526 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3;
527 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem;
528 p->p_cpulimit = RLIM_INFINITY;
529
|
529 p->p_stats = pstats_alloc();
530
531 /* Allocate a prototype map so we have something to fork. */
532 pmap_pinit0(vmspace_pmap(&vmspace0));
533 p->p_vmspace = &vmspace0;
534 vmspace0.vm_refcnt = 1;
535
536 /*
537 * proc0 is not expected to enter usermode, so there is no special
538 * handling for sv_minuser here, like is done for exec_new_vmspace().
539 */
540 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0),
541 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser);
542
543 /*
544 * Call the init and ctor for the new thread and proc. We wait
545 * to do this until all other structures are fairly sane.
546 */
547 EVENTHANDLER_INVOKE(process_init, p);
548 EVENTHANDLER_INVOKE(thread_init, td);
549 EVENTHANDLER_INVOKE(process_ctor, p);
550 EVENTHANDLER_INVOKE(thread_ctor, td);
551
552 /*
553 * Charge root for one process.
554 */
555 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0);
556}
557SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL);
558
559/* ARGSUSED*/
560static void
561proc0_post(void *dummy __unused)
562{
563 struct timespec ts;
564 struct proc *p;
565 struct rusage ru;
566 struct thread *td;
567
568 /*
569 * Now we can look at the time, having had a chance to verify the
570 * time from the filesystem. Pretend that proc0 started now.
571 */
572 sx_slock(&allproc_lock);
573 FOREACH_PROC_IN_SYSTEM(p) {
574 microuptime(&p->p_stats->p_start);
575 PROC_SLOCK(p);
576 rufetch(p, &ru); /* Clears thread stats */
577 PROC_SUNLOCK(p);
578 p->p_rux.rux_runtime = 0;
579 p->p_rux.rux_uticks = 0;
580 p->p_rux.rux_sticks = 0;
581 p->p_rux.rux_iticks = 0;
582 FOREACH_THREAD_IN_PROC(p, td) {
583 td->td_runtime = 0;
584 }
585 }
586 sx_sunlock(&allproc_lock);
587 PCPU_SET(switchtime, cpu_ticks());
588 PCPU_SET(switchticks, ticks);
589
590 /*
591 * Give the ``random'' number generator a thump.
592 */
593 nanotime(&ts);
594 srandom(ts.tv_sec ^ ts.tv_nsec);
595}
596SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL);
597
598static void
599random_init(void *dummy __unused)
600{
601
602 /*
603 * After CPU has been started we have some randomness on most
604 * platforms via get_cyclecount(). For platforms that don't
605 * we will reseed random(9) in proc0_post() as well.
606 */
607 srandom(get_cyclecount());
608}
609SYSINIT(random, SI_SUB_RANDOM, SI_ORDER_FIRST, random_init, NULL);
610
611/*
612 ***************************************************************************
613 ****
614 **** The following SYSINIT's and glue code should be moved to the
615 **** respective files on a per subsystem basis.
616 ****
617 ***************************************************************************
618 */
619
620
621/*
622 ***************************************************************************
623 ****
624 **** The following code probably belongs in another file, like
625 **** kern/init_init.c.
626 ****
627 ***************************************************************************
628 */
629
630/*
631 * List of paths to try when searching for "init".
632 */
633static char init_path[MAXPATHLEN] =
634#ifdef INIT_PATH
635 __XSTRING(INIT_PATH);
636#else
637 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init:/stand/sysinstall";
638#endif
639SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0,
640 "Path used to search the init process");
641
642/*
643 * Shutdown timeout of init(8).
644 * Unused within kernel, but used to control init(8), hence do not remove.
645 */
646#ifndef INIT_SHUTDOWN_TIMEOUT
647#define INIT_SHUTDOWN_TIMEOUT 120
648#endif
649static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT;
650SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout,
651 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). "
652 "Unused within kernel, but used to control init(8)");
653
654/*
655 * Start the initial user process; try exec'ing each pathname in init_path.
656 * The program is invoked with one argument containing the boot flags.
657 */
658static void
659start_init(void *dummy)
660{
661 vm_offset_t addr;
662 struct execve_args args;
663 int options, error;
664 char *var, *path, *next, *s;
665 char *ucp, **uap, *arg0, *arg1;
666 struct thread *td;
667 struct proc *p;
668
669 mtx_lock(&Giant);
670
671 GIANT_REQUIRED;
672
673 td = curthread;
674 p = td->td_proc;
675
676 vfs_mountroot();
677
678 /*
679 * Need just enough stack to hold the faked-up "execve()" arguments.
680 */
681 addr = p->p_sysent->sv_usrstack - PAGE_SIZE;
682 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
683 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
684 panic("init: couldn't allocate argument space");
685 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
686 p->p_vmspace->vm_ssize = 1;
687
688 if ((var = getenv("init_path")) != NULL) {
689 strlcpy(init_path, var, sizeof(init_path));
690 freeenv(var);
691 }
692
693 for (path = init_path; *path != '\0'; path = next) {
694 while (*path == ':')
695 path++;
696 if (*path == '\0')
697 break;
698 for (next = path; *next != '\0' && *next != ':'; next++)
699 /* nothing */ ;
700 if (bootverbose)
701 printf("start_init: trying %.*s\n", (int)(next - path),
702 path);
703
704 /*
705 * Move out the boot flag argument.
706 */
707 options = 0;
708 ucp = (char *)p->p_sysent->sv_usrstack;
709 (void)subyte(--ucp, 0); /* trailing zero */
710 if (boothowto & RB_SINGLE) {
711 (void)subyte(--ucp, 's');
712 options = 1;
713 }
714#ifdef notyet
715 if (boothowto & RB_FASTBOOT) {
716 (void)subyte(--ucp, 'f');
717 options = 1;
718 }
719#endif
720
721#ifdef BOOTCDROM
722 (void)subyte(--ucp, 'C');
723 options = 1;
724#endif
725
726 if (options == 0)
727 (void)subyte(--ucp, '-');
728 (void)subyte(--ucp, '-'); /* leading hyphen */
729 arg1 = ucp;
730
731 /*
732 * Move out the file name (also arg 0).
733 */
734 (void)subyte(--ucp, 0);
735 for (s = next - 1; s >= path; s--)
736 (void)subyte(--ucp, *s);
737 arg0 = ucp;
738
739 /*
740 * Move out the arg pointers.
741 */
742 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
743 (void)suword((caddr_t)--uap, (long)0); /* terminator */
744 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
745 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
746
747 /*
748 * Point at the arguments.
749 */
750 args.fname = arg0;
751 args.argv = uap;
752 args.envv = NULL;
753
754 /*
755 * Now try to exec the program. If can't for any reason
756 * other than it doesn't exist, complain.
757 *
758 * Otherwise, return via fork_trampoline() all the way
759 * to user mode as init!
760 */
761 if ((error = execve(td, &args)) == 0) {
762 mtx_unlock(&Giant);
763 return;
764 }
765 if (error != ENOENT)
766 printf("exec %.*s: error %d\n", (int)(next - path),
767 path, error);
768 }
769 printf("init: not found in path %s\n", init_path);
770 panic("no init");
771}
772
773/*
774 * Like kproc_create(), but runs in it's own address space.
775 * We do this early to reserve pid 1.
776 *
777 * Note special case - do not make it runnable yet. Other work
778 * in progress will change this more.
779 */
780static void
781create_init(const void *udata __unused)
782{
783 struct ucred *newcred, *oldcred;
784 int error;
785
786 error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc);
787 if (error)
788 panic("cannot fork init: %d\n", error);
789 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1"));
790 /* divorce init's credentials from the kernel's */
791 newcred = crget();
792 PROC_LOCK(initproc);
793 initproc->p_flag |= P_SYSTEM | P_INMEM;
794 oldcred = initproc->p_ucred;
795 crcopy(newcred, oldcred);
796#ifdef MAC
797 mac_cred_create_init(newcred);
798#endif
799#ifdef AUDIT
800 audit_cred_proc1(newcred);
801#endif
802 initproc->p_ucred = newcred;
803 PROC_UNLOCK(initproc);
804 crfree(oldcred);
805 cred_update_thread(FIRST_THREAD_IN_PROC(initproc));
806 cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL);
807}
808SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL);
809
810/*
811 * Make it runnable now.
812 */
813static void
814kick_init(const void *udata __unused)
815{
816 struct thread *td;
817
818 td = FIRST_THREAD_IN_PROC(initproc);
819 thread_lock(td);
820 TD_SET_CAN_RUN(td);
821 sched_add(td, SRQ_BORING);
822 thread_unlock(td);
823}
824SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL);
| 533 p->p_stats = pstats_alloc();
534
535 /* Allocate a prototype map so we have something to fork. */
536 pmap_pinit0(vmspace_pmap(&vmspace0));
537 p->p_vmspace = &vmspace0;
538 vmspace0.vm_refcnt = 1;
539
540 /*
541 * proc0 is not expected to enter usermode, so there is no special
542 * handling for sv_minuser here, like is done for exec_new_vmspace().
543 */
544 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0),
545 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser);
546
547 /*
548 * Call the init and ctor for the new thread and proc. We wait
549 * to do this until all other structures are fairly sane.
550 */
551 EVENTHANDLER_INVOKE(process_init, p);
552 EVENTHANDLER_INVOKE(thread_init, td);
553 EVENTHANDLER_INVOKE(process_ctor, p);
554 EVENTHANDLER_INVOKE(thread_ctor, td);
555
556 /*
557 * Charge root for one process.
558 */
559 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0);
560}
561SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL);
562
563/* ARGSUSED*/
564static void
565proc0_post(void *dummy __unused)
566{
567 struct timespec ts;
568 struct proc *p;
569 struct rusage ru;
570 struct thread *td;
571
572 /*
573 * Now we can look at the time, having had a chance to verify the
574 * time from the filesystem. Pretend that proc0 started now.
575 */
576 sx_slock(&allproc_lock);
577 FOREACH_PROC_IN_SYSTEM(p) {
578 microuptime(&p->p_stats->p_start);
579 PROC_SLOCK(p);
580 rufetch(p, &ru); /* Clears thread stats */
581 PROC_SUNLOCK(p);
582 p->p_rux.rux_runtime = 0;
583 p->p_rux.rux_uticks = 0;
584 p->p_rux.rux_sticks = 0;
585 p->p_rux.rux_iticks = 0;
586 FOREACH_THREAD_IN_PROC(p, td) {
587 td->td_runtime = 0;
588 }
589 }
590 sx_sunlock(&allproc_lock);
591 PCPU_SET(switchtime, cpu_ticks());
592 PCPU_SET(switchticks, ticks);
593
594 /*
595 * Give the ``random'' number generator a thump.
596 */
597 nanotime(&ts);
598 srandom(ts.tv_sec ^ ts.tv_nsec);
599}
600SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL);
601
602static void
603random_init(void *dummy __unused)
604{
605
606 /*
607 * After CPU has been started we have some randomness on most
608 * platforms via get_cyclecount(). For platforms that don't
609 * we will reseed random(9) in proc0_post() as well.
610 */
611 srandom(get_cyclecount());
612}
613SYSINIT(random, SI_SUB_RANDOM, SI_ORDER_FIRST, random_init, NULL);
614
615/*
616 ***************************************************************************
617 ****
618 **** The following SYSINIT's and glue code should be moved to the
619 **** respective files on a per subsystem basis.
620 ****
621 ***************************************************************************
622 */
623
624
625/*
626 ***************************************************************************
627 ****
628 **** The following code probably belongs in another file, like
629 **** kern/init_init.c.
630 ****
631 ***************************************************************************
632 */
633
634/*
635 * List of paths to try when searching for "init".
636 */
637static char init_path[MAXPATHLEN] =
638#ifdef INIT_PATH
639 __XSTRING(INIT_PATH);
640#else
641 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init:/stand/sysinstall";
642#endif
643SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0,
644 "Path used to search the init process");
645
646/*
647 * Shutdown timeout of init(8).
648 * Unused within kernel, but used to control init(8), hence do not remove.
649 */
650#ifndef INIT_SHUTDOWN_TIMEOUT
651#define INIT_SHUTDOWN_TIMEOUT 120
652#endif
653static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT;
654SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout,
655 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). "
656 "Unused within kernel, but used to control init(8)");
657
658/*
659 * Start the initial user process; try exec'ing each pathname in init_path.
660 * The program is invoked with one argument containing the boot flags.
661 */
662static void
663start_init(void *dummy)
664{
665 vm_offset_t addr;
666 struct execve_args args;
667 int options, error;
668 char *var, *path, *next, *s;
669 char *ucp, **uap, *arg0, *arg1;
670 struct thread *td;
671 struct proc *p;
672
673 mtx_lock(&Giant);
674
675 GIANT_REQUIRED;
676
677 td = curthread;
678 p = td->td_proc;
679
680 vfs_mountroot();
681
682 /*
683 * Need just enough stack to hold the faked-up "execve()" arguments.
684 */
685 addr = p->p_sysent->sv_usrstack - PAGE_SIZE;
686 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
687 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
688 panic("init: couldn't allocate argument space");
689 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
690 p->p_vmspace->vm_ssize = 1;
691
692 if ((var = getenv("init_path")) != NULL) {
693 strlcpy(init_path, var, sizeof(init_path));
694 freeenv(var);
695 }
696
697 for (path = init_path; *path != '\0'; path = next) {
698 while (*path == ':')
699 path++;
700 if (*path == '\0')
701 break;
702 for (next = path; *next != '\0' && *next != ':'; next++)
703 /* nothing */ ;
704 if (bootverbose)
705 printf("start_init: trying %.*s\n", (int)(next - path),
706 path);
707
708 /*
709 * Move out the boot flag argument.
710 */
711 options = 0;
712 ucp = (char *)p->p_sysent->sv_usrstack;
713 (void)subyte(--ucp, 0); /* trailing zero */
714 if (boothowto & RB_SINGLE) {
715 (void)subyte(--ucp, 's');
716 options = 1;
717 }
718#ifdef notyet
719 if (boothowto & RB_FASTBOOT) {
720 (void)subyte(--ucp, 'f');
721 options = 1;
722 }
723#endif
724
725#ifdef BOOTCDROM
726 (void)subyte(--ucp, 'C');
727 options = 1;
728#endif
729
730 if (options == 0)
731 (void)subyte(--ucp, '-');
732 (void)subyte(--ucp, '-'); /* leading hyphen */
733 arg1 = ucp;
734
735 /*
736 * Move out the file name (also arg 0).
737 */
738 (void)subyte(--ucp, 0);
739 for (s = next - 1; s >= path; s--)
740 (void)subyte(--ucp, *s);
741 arg0 = ucp;
742
743 /*
744 * Move out the arg pointers.
745 */
746 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
747 (void)suword((caddr_t)--uap, (long)0); /* terminator */
748 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
749 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
750
751 /*
752 * Point at the arguments.
753 */
754 args.fname = arg0;
755 args.argv = uap;
756 args.envv = NULL;
757
758 /*
759 * Now try to exec the program. If can't for any reason
760 * other than it doesn't exist, complain.
761 *
762 * Otherwise, return via fork_trampoline() all the way
763 * to user mode as init!
764 */
765 if ((error = execve(td, &args)) == 0) {
766 mtx_unlock(&Giant);
767 return;
768 }
769 if (error != ENOENT)
770 printf("exec %.*s: error %d\n", (int)(next - path),
771 path, error);
772 }
773 printf("init: not found in path %s\n", init_path);
774 panic("no init");
775}
776
777/*
778 * Like kproc_create(), but runs in it's own address space.
779 * We do this early to reserve pid 1.
780 *
781 * Note special case - do not make it runnable yet. Other work
782 * in progress will change this more.
783 */
784static void
785create_init(const void *udata __unused)
786{
787 struct ucred *newcred, *oldcred;
788 int error;
789
790 error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc);
791 if (error)
792 panic("cannot fork init: %d\n", error);
793 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1"));
794 /* divorce init's credentials from the kernel's */
795 newcred = crget();
796 PROC_LOCK(initproc);
797 initproc->p_flag |= P_SYSTEM | P_INMEM;
798 oldcred = initproc->p_ucred;
799 crcopy(newcred, oldcred);
800#ifdef MAC
801 mac_cred_create_init(newcred);
802#endif
803#ifdef AUDIT
804 audit_cred_proc1(newcred);
805#endif
806 initproc->p_ucred = newcred;
807 PROC_UNLOCK(initproc);
808 crfree(oldcred);
809 cred_update_thread(FIRST_THREAD_IN_PROC(initproc));
810 cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL);
811}
812SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL);
813
814/*
815 * Make it runnable now.
816 */
817static void
818kick_init(const void *udata __unused)
819{
820 struct thread *td;
821
822 td = FIRST_THREAD_IN_PROC(initproc);
823 thread_lock(td);
824 TD_SET_CAN_RUN(td);
825 sched_add(td, SRQ_BORING);
826 thread_unlock(td);
827}
828SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL);
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