1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1995 Terrence R. Lambert
5 * All rights reserved.
6 *
7 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
8 * The Regents of the University of California. All rights reserved.
9 * (c) UNIX System Laboratories, Inc.
10 * All or some portions of this file are derived from material licensed
11 * to the University of California by American Telephone and Telegraph
12 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
13 * the permission of UNIX System Laboratories, Inc.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. All advertising materials mentioning features or use of this software
24 * must display the following acknowledgement:
25 * This product includes software developed by the University of
26 * California, Berkeley and its contributors.
27 * 4. Neither the name of the University nor the names of its contributors
28 * may be used to endorse or promote products derived from this software
29 * without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * SUCH DAMAGE.
42 */
43
44 #include "opt_ddb.h"
45 #include "opt_kdb.h"
46 #include "opt_init_path.h"
47 #include "opt_verbose_sysinit.h"
48
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/boottrace.h>
52 #include <sys/conf.h>
53 #include <sys/cpuset.h>
54 #include <sys/dtrace_bsd.h>
55 #include <sys/epoch.h>
56 #include <sys/eventhandler.h>
57 #include <sys/exec.h>
58 #include <sys/file.h>
59 #include <sys/filedesc.h>
60 #include <sys/imgact.h>
61 #include <sys/jail.h>
62 #include <sys/kernel.h>
63 #include <sys/ktr.h>
64 #include <sys/lock.h>
65 #include <sys/loginclass.h>
66 #include <sys/malloc.h>
67 #include <sys/mount.h>
68 #include <sys/mutex.h>
69 #include <sys/proc.h>
70 #include <sys/racct.h>
71 #include <sys/reboot.h>
72 #include <sys/resourcevar.h>
73 #include <sys/queue.h>
74 #include <sys/queue_mergesort.h>
75 #include <sys/sched.h>
76 #include <sys/signalvar.h>
77 #include <sys/sx.h>
78 #include <sys/syscallsubr.h>
79 #include <sys/sysctl.h>
80 #include <sys/sysent.h>
81 #include <sys/sysproto.h>
82 #include <sys/unistd.h>
83 #include <sys/vmmeter.h>
84 #include <sys/vnode.h>
85
86 #include <machine/cpu.h>
87
88 #include <security/audit/audit.h>
89 #include <security/mac/mac_framework.h>
90
91 #include <vm/vm.h>
92 #include <vm/vm_param.h>
93 #include <vm/vm_extern.h>
94 #include <vm/pmap.h>
95 #include <vm/vm_map.h>
96 #include <sys/copyright.h>
97
98 #include <ddb/ddb.h>
99 #include <ddb/db_sym.h>
100
101 void mi_startup(void); /* Should be elsewhere */
102
103 /* Components of the first process -- never freed. */
104 static struct session session0;
105 static struct pgrp pgrp0;
106 struct proc proc0;
107 struct thread0_storage thread0_st __aligned(32) = {
108 .t0st_thread = {
109 /*
110 * thread0.td_pflags is set with TDP_NOFAULTING to
111 * short-cut the vm page fault handler until it is
112 * ready. It is cleared in vm_init() after VM
113 * initialization.
114 */
115 .td_pflags = TDP_NOFAULTING,
116 },
117 };
118 struct vmspace vmspace0;
119 struct proc *initproc;
120
121 int
linux_alloc_current_noop(struct thread * td __unused,int flags __unused)122 linux_alloc_current_noop(struct thread *td __unused, int flags __unused)
123 {
124 return (0);
125 }
126 int (*lkpi_alloc_current)(struct thread *, int) = linux_alloc_current_noop;
127
128 #ifndef BOOTHOWTO
129 #define BOOTHOWTO 0
130 #endif
131 int boothowto = BOOTHOWTO; /* initialized so that it can be patched */
132 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0,
133 "Boot control flags, passed from loader");
134
135 #ifndef BOOTVERBOSE
136 #define BOOTVERBOSE 0
137 #endif
138 int bootverbose = BOOTVERBOSE;
139 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0,
140 "Control the output of verbose kernel messages");
141
142 #ifdef VERBOSE_SYSINIT
143 /*
144 * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to
145 * dictate the default VERBOSE_SYSINIT behavior. Significant values for this
146 * option and associated tunable are:
147 * - 0, 'compiled in but silent by default'
148 * - 1, 'compiled in but verbose by default' (default)
149 */
150 int verbose_sysinit = VERBOSE_SYSINIT;
151 #endif
152
153 #ifdef INVARIANTS
154 FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance");
155 #endif
156
157 /*
158 * The sysinit linker set compiled into the kernel. These are placed onto the
159 * sysinit list by mi_startup; sysinit_add can add (e.g., from klds) additional
160 * sysinits to the linked list but the linker set here does not change.
161 */
162 SET_DECLARE(sysinit_set, struct sysinit);
163
164 /*
165 * The sysinit lists. Items are moved to sysinit_done_list when done.
166 */
167 static STAILQ_HEAD(sysinitlist, sysinit) sysinit_list;
168 static struct sysinitlist sysinit_done_list =
169 STAILQ_HEAD_INITIALIZER(sysinit_done_list);
170
171 /*
172 * Compare two sysinits; return -1, 0, or 1 if a comes before, at the same time
173 * as, or after b.
174 */
175 static int
sysinit_compar(struct sysinit * a,struct sysinit * b,void * thunk __unused)176 sysinit_compar(struct sysinit *a, struct sysinit *b, void *thunk __unused)
177 {
178
179 if (a->subsystem < b->subsystem)
180 return (-1);
181 if (a->subsystem > b->subsystem)
182 return (1);
183 if (a->order < b->order)
184 return (-1);
185 if (a->order > b->order)
186 return (1);
187 return (0);
188 }
189
190 static void
sysinit_mklist(struct sysinitlist * list,struct sysinit ** set,struct sysinit ** set_end)191 sysinit_mklist(struct sysinitlist *list, struct sysinit **set,
192 struct sysinit **set_end)
193 {
194 struct sysinit **sipp;
195
196 TSENTER();
197 TSENTER2("listify");
198 STAILQ_INIT(list);
199 for (sipp = set; sipp < set_end; sipp++)
200 STAILQ_INSERT_TAIL(list, *sipp, next);
201 TSEXIT2("listify");
202 TSENTER2("mergesort");
203 STAILQ_MERGESORT(list, NULL, sysinit_compar, sysinit, next);
204 TSEXIT2("mergesort");
205 TSEXIT();
206 }
207
208 /*
209 * Merge a new sysinit set into the sysinit list.
210 */
211 void
sysinit_add(struct sysinit ** set,struct sysinit ** set_end)212 sysinit_add(struct sysinit **set, struct sysinit **set_end)
213 {
214 struct sysinitlist new_list;
215
216 TSENTER();
217
218 /* Construct a sorted list from the new sysinits. */
219 sysinit_mklist(&new_list, set, set_end);
220
221 /* Merge the new list into the existing one. */
222 TSENTER2("STAILQ_MERGE");
223 STAILQ_MERGE(&sysinit_list, &new_list, NULL, sysinit_compar, sysinit, next);
224 TSEXIT2("STAILQ_MERGE");
225
226 TSEXIT();
227 }
228
229 #if defined (DDB) && defined(VERBOSE_SYSINIT)
230 static const char *
symbol_name(vm_offset_t va,db_strategy_t strategy)231 symbol_name(vm_offset_t va, db_strategy_t strategy)
232 {
233 const char *name;
234 c_db_sym_t sym;
235 db_expr_t offset;
236
237 if (va == 0)
238 return (NULL);
239 sym = db_search_symbol(va, strategy, &offset);
240 if (offset != 0)
241 return (NULL);
242 db_symbol_values(sym, &name, NULL);
243 return (name);
244 }
245 #endif
246
247 /*
248 * System startup; initialize the world, create process 0, mount root
249 * filesystem, and fork to create init and pagedaemon. Most of the
250 * hard work is done in the lower-level initialization routines including
251 * startup(), which does memory initialization and autoconfiguration.
252 *
253 * This allows simple addition of new kernel subsystems that require
254 * boot time initialization. It also allows substitution of subsystem
255 * (for instance, a scheduler, kernel profiler, or VM system) by object
256 * module. Finally, it allows for optional "kernel threads".
257 */
258 void
mi_startup(void)259 mi_startup(void)
260 {
261 struct sysinit *sip;
262 int last;
263 #if defined(VERBOSE_SYSINIT)
264 int verbose;
265 #endif
266
267 TSENTER();
268
269 if (boothowto & RB_VERBOSE)
270 bootverbose++;
271
272 /* Construct and sort sysinit list. */
273 sysinit_mklist(&sysinit_list, SET_BEGIN(sysinit_set), SET_LIMIT(sysinit_set));
274
275 last = SI_SUB_DUMMY;
276 #if defined(VERBOSE_SYSINIT)
277 TUNABLE_INT_FETCH("debug.verbose_sysinit", &verbose_sysinit);
278 verbose = 0;
279 #if !defined(DDB)
280 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n");
281 #endif
282 #endif
283
284 /*
285 * Perform each system initialization task from the ordered list. Note
286 * that if sysinit_list is modified (e.g. by a KLD) we will nonetheless
287 * always perform the earlist-sorted sysinit at each step; using the
288 * STAILQ_FOREACH macro would result in items being skipped if inserted
289 * earlier than the "current item".
290 */
291 while ((sip = STAILQ_FIRST(&sysinit_list)) != NULL) {
292 STAILQ_REMOVE_HEAD(&sysinit_list, next);
293 STAILQ_INSERT_TAIL(&sysinit_done_list, sip, next);
294
295 if (sip->subsystem == SI_SUB_DUMMY)
296 continue; /* skip dummy task(s)*/
297
298 if (sip->subsystem > last)
299 BOOTTRACE_INIT("sysinit 0x%7x", sip->subsystem);
300
301 #if defined(VERBOSE_SYSINIT)
302 if (sip->subsystem != last && verbose_sysinit != 0) {
303 verbose = 1;
304 printf("subsystem %x\n", sip->subsystem);
305 }
306 if (verbose) {
307 #if defined(DDB)
308 const char *func, *data;
309
310 func = symbol_name((vm_offset_t)sip->func,
311 DB_STGY_PROC);
312 data = symbol_name((vm_offset_t)sip->udata,
313 DB_STGY_ANY);
314 if (func != NULL && data != NULL)
315 printf(" %s(&%s)... ", func, data);
316 else if (func != NULL)
317 printf(" %s(%p)... ", func, sip->udata);
318 else
319 #endif
320 printf(" %p(%p)... ", sip->func,
321 sip->udata);
322 }
323 #endif
324
325 /* Call function */
326 (*(sip->func))(sip->udata);
327
328 #if defined(VERBOSE_SYSINIT)
329 if (verbose)
330 printf("done.\n");
331 #endif
332
333 /* Check off the one we're just done */
334 last = sip->subsystem;
335 }
336
337 TSEXIT(); /* Here so we don't overlap with start_init. */
338 BOOTTRACE("mi_startup done");
339
340 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED);
341 mtx_unlock(&Giant);
342
343 /*
344 * We can't free our thread structure since it is statically allocated.
345 * Just sleep forever. This thread could be repurposed for something if
346 * the need arises.
347 */
348 for (;;)
349 tsleep(__builtin_frame_address(0), PNOLOCK, "-", 0);
350 }
351
352 static void
print_caddr_t(const void * data)353 print_caddr_t(const void *data)
354 {
355 printf("%s", (const char *)data);
356 }
357
358 static void
print_version(const void * data __unused)359 print_version(const void *data __unused)
360 {
361 int len;
362
363 /* Strip a trailing newline from version. */
364 len = strlen(version);
365 while (len > 0 && version[len - 1] == '\n')
366 len--;
367 printf("%.*s %s\n", len, version, machine);
368 printf("%s\n", compiler_version);
369 }
370
371 C_SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t,
372 copyright);
373 C_SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t,
374 trademark);
375 C_SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL);
376
377 #ifdef WITNESS
378 static const char wit_warn[] =
379 "WARNING: WITNESS option enabled, expect reduced performance.\n";
380 C_SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH,
381 print_caddr_t, wit_warn);
382 C_SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH,
383 print_caddr_t, wit_warn);
384 #endif
385
386 #ifdef DIAGNOSTIC
387 static const char diag_warn[] =
388 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n";
389 C_SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH,
390 print_caddr_t, diag_warn);
391 C_SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH,
392 print_caddr_t, diag_warn);
393 #endif
394
395 #if __SIZEOF_LONG__ == 4
396 static const char ilp32_warn[] =
397 "WARNING: 32-bit kernels are deprecated and may be removed in FreeBSD 16.0.\n";
398 C_SYSINIT(ilp32warn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH,
399 print_caddr_t, ilp32_warn);
400 C_SYSINIT(ilp32warn2, SI_SUB_LAST, SI_ORDER_FIFTH,
401 print_caddr_t, ilp32_warn);
402 #endif
403
404 static int
null_fetch_syscall_args(struct thread * td __unused)405 null_fetch_syscall_args(struct thread *td __unused)
406 {
407
408 panic("null_fetch_syscall_args");
409 }
410
411 static void
null_set_syscall_retval(struct thread * td __unused,int error __unused)412 null_set_syscall_retval(struct thread *td __unused, int error __unused)
413 {
414
415 panic("null_set_syscall_retval");
416 }
417
418 static void
null_set_fork_retval(struct thread * td __unused)419 null_set_fork_retval(struct thread *td __unused)
420 {
421
422 }
423
424 struct sysentvec null_sysvec = {
425 .sv_size = 0,
426 .sv_table = NULL,
427 .sv_fixup = NULL,
428 .sv_sendsig = NULL,
429 .sv_sigcode = NULL,
430 .sv_szsigcode = NULL,
431 .sv_name = "null",
432 .sv_coredump = NULL,
433 .sv_minsigstksz = 0,
434 .sv_minuser = VM_MIN_ADDRESS,
435 .sv_maxuser = VM_MAXUSER_ADDRESS,
436 .sv_usrstack = USRSTACK,
437 .sv_psstrings = PS_STRINGS,
438 .sv_psstringssz = sizeof(struct ps_strings),
439 .sv_stackprot = VM_PROT_ALL,
440 .sv_copyout_strings = NULL,
441 .sv_setregs = NULL,
442 .sv_fixlimit = NULL,
443 .sv_maxssiz = NULL,
444 .sv_flags = 0,
445 .sv_set_syscall_retval = null_set_syscall_retval,
446 .sv_fetch_syscall_args = null_fetch_syscall_args,
447 .sv_syscallnames = NULL,
448 .sv_schedtail = NULL,
449 .sv_thread_detach = NULL,
450 .sv_trap = NULL,
451 .sv_set_fork_retval = null_set_fork_retval,
452 .sv_regset_begin = NULL,
453 .sv_regset_end = NULL,
454 };
455
456 /*
457 * The two following SYSINIT's are proc0 specific glue code. I am not
458 * convinced that they can not be safely combined, but their order of
459 * operation has been maintained as the same as the original init_main.c
460 * for right now.
461 */
462 /* ARGSUSED*/
463 static void
proc0_init(void * dummy __unused)464 proc0_init(void *dummy __unused)
465 {
466 struct proc *p;
467 struct thread *td;
468 struct ucred *newcred;
469 struct uidinfo tmpuinfo;
470 struct loginclass tmplc = {
471 .lc_name = "",
472 };
473 vm_paddr_t pageablemem;
474 int i;
475
476 GIANT_REQUIRED;
477 p = &proc0;
478 td = &thread0;
479
480 /*
481 * Initialize magic number and osrel.
482 */
483 p->p_magic = P_MAGIC;
484 p->p_osrel = osreldate;
485
486 /*
487 * Initialize thread and process structures.
488 */
489 procinit(); /* set up proc zone */
490 threadinit(); /* set up UMA zones */
491
492 /*
493 * Initialise scheduler resources.
494 * Add scheduler specific parts to proc, thread as needed.
495 */
496 schedinit(); /* scheduler gets its house in order */
497
498 /*
499 * Create process 0.
500 */
501 LIST_INSERT_HEAD(&allproc, p, p_list);
502 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash);
503 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
504 sx_init(&pgrp0.pg_killsx, "killpg racer");
505 p->p_pgrp = &pgrp0;
506 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
507 LIST_INIT(&pgrp0.pg_members);
508 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
509
510 pgrp0.pg_session = &session0;
511 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF);
512 refcount_init(&session0.s_count, 1);
513 session0.s_leader = p;
514
515 p->p_sysent = &null_sysvec;
516 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC;
517 p->p_flag2 = 0;
518 p->p_state = PRS_NORMAL;
519 p->p_klist = knlist_alloc(&p->p_mtx);
520 STAILQ_INIT(&p->p_ktr);
521 p->p_nice = NZERO;
522 td->td_tid = THREAD0_TID;
523 tidhash_add(td);
524 TD_SET_STATE(td, TDS_RUNNING);
525 td->td_pri_class = PRI_TIMESHARE;
526 td->td_user_pri = PUSER;
527 td->td_base_user_pri = PUSER;
528 td->td_lend_user_pri = PRI_MAX;
529 td->td_priority = PVM;
530 td->td_base_pri = PVM;
531 td->td_oncpu = curcpu;
532 td->td_flags = TDF_INMEM;
533 td->td_pflags = TDP_KTHREAD;
534 td->td_cpuset = cpuset_thread0();
535 td->td_domain.dr_policy = td->td_cpuset->cs_domain;
536 prison0_init();
537 p->p_peers = 0;
538 p->p_leader = p;
539 p->p_reaper = p;
540 p->p_treeflag |= P_TREE_REAPER;
541 LIST_INIT(&p->p_reaplist);
542
543 strncpy(p->p_comm, "kernel", sizeof (p->p_comm));
544 strncpy(td->td_name, "kernel", sizeof (td->td_name));
545
546 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0);
547 callout_init_mtx(&p->p_limco, &p->p_mtx, 0);
548 callout_init(&td->td_slpcallout, 1);
549 TAILQ_INIT(&p->p_kqtim_stop);
550
551 /* Create credentials. */
552 newcred = crget();
553 newcred->cr_ngroups = 1; /* group 0 */
554 /* A hack to prevent uifind from tripping over NULL pointers. */
555 curthread->td_ucred = newcred;
556 tmpuinfo.ui_uid = 1;
557 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo;
558 newcred->cr_uidinfo = uifind(0);
559 newcred->cr_ruidinfo = uifind(0);
560 newcred->cr_loginclass = &tmplc;
561 newcred->cr_loginclass = loginclass_find("default");
562 /* End hack. creds get properly set later with thread_cow_get_proc */
563 curthread->td_ucred = NULL;
564 newcred->cr_prison = &prison0;
565 newcred->cr_users++; /* avoid assertion failure */
566 p->p_ucred = crcowget(newcred);
567 newcred->cr_users--;
568 crfree(newcred);
569 #ifdef AUDIT
570 audit_cred_kproc0(newcred);
571 #endif
572 #ifdef MAC
573 mac_cred_create_kproc0(newcred);
574 #endif
575 /* Create sigacts. */
576 p->p_sigacts = sigacts_alloc();
577
578 /* Initialize signal state for process 0. */
579 siginit(&proc0);
580
581 /* Create the file descriptor table. */
582 p->p_pd = pdinit(NULL, false);
583 p->p_fd = fdinit();
584 p->p_fdtol = NULL;
585
586 /* Create the limits structures. */
587 p->p_limit = lim_alloc();
588 for (i = 0; i < RLIM_NLIMITS; i++)
589 p->p_limit->pl_rlimit[i].rlim_cur =
590 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY;
591 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur =
592 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
593 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur =
594 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
595 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz;
596 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz;
597 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz;
598 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz;
599 /* Cast to avoid overflow on i386/PAE. */
600 pageablemem = ptoa((vm_paddr_t)vm_free_count());
601 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur =
602 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem;
603 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3;
604 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem;
605 p->p_cpulimit = RLIM_INFINITY;
606
607 PROC_LOCK(p);
608 thread_cow_get_proc(td, p);
609 PROC_UNLOCK(p);
610
611 /* Initialize resource accounting structures. */
612 racct_create(&p->p_racct);
613
614 p->p_stats = pstats_alloc();
615
616 /* Allocate a prototype map so we have something to fork. */
617 p->p_vmspace = &vmspace0;
618 refcount_init(&vmspace0.vm_refcnt, 1);
619 pmap_pinit0(vmspace_pmap(&vmspace0));
620
621 /*
622 * proc0 is not expected to enter usermode, so there is no special
623 * handling for sv_minuser here, like is done for exec_new_vmspace().
624 */
625 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0),
626 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser);
627
628 /*
629 * Call the init and ctor for the new thread and proc. We wait
630 * to do this until all other structures are fairly sane.
631 */
632 EVENTHANDLER_DIRECT_INVOKE(process_init, p);
633 EVENTHANDLER_DIRECT_INVOKE(thread_init, td);
634 #ifdef KDTRACE_HOOKS
635 kdtrace_proc_ctor(p);
636 kdtrace_thread_ctor(td);
637 #endif
638 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p);
639 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td);
640
641 /*
642 * Charge root for one process.
643 */
644 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0);
645 PROC_LOCK(p);
646 racct_add_force(p, RACCT_NPROC, 1);
647 PROC_UNLOCK(p);
648 }
649 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL);
650
651 /* ARGSUSED*/
652 static void
proc0_post(void * dummy __unused)653 proc0_post(void *dummy __unused)
654 {
655 struct proc *p;
656 struct thread *td;
657
658 /*
659 * Now we can look at the time, having had a chance to verify the
660 * time from the filesystem. Pretend that all current threads
661 * started now.
662 */
663 sx_slock(&allproc_lock);
664 FOREACH_PROC_IN_SYSTEM(p) {
665 PROC_LOCK(p);
666 if (p->p_state == PRS_NEW) {
667 PROC_UNLOCK(p);
668 continue;
669 }
670 microuptime(&p->p_stats->p_start);
671 PROC_STATLOCK(p);
672 ruxreset(&p->p_rux);
673 FOREACH_THREAD_IN_PROC(p, td) {
674 thread_lock(td);
675 td->td_incruntime = 0;
676 td->td_runtime = 0;
677 td->td_pticks = 0;
678 td->td_sticks = 0;
679 td->td_iticks = 0;
680 td->td_uticks = 0;
681 ruxreset(&td->td_rux);
682 thread_unlock(td);
683 }
684 PROC_STATUNLOCK(p);
685 PROC_UNLOCK(p);
686 }
687 sx_sunlock(&allproc_lock);
688 PCPU_SET(switchtime, cpu_ticks());
689 PCPU_SET(switchticks, ticks);
690 }
691 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL);
692
693 /*
694 ***************************************************************************
695 ****
696 **** The following SYSINIT's and glue code should be moved to the
697 **** respective files on a per subsystem basis.
698 ****
699 ***************************************************************************
700 */
701
702 /*
703 * List of paths to try when searching for "init".
704 */
705 static char init_path[MAXPATHLEN] =
706 #ifdef INIT_PATH
707 __XSTRING(INIT_PATH);
708 #else
709 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init";
710 #endif
711 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0,
712 "Path used to search the init process");
713
714 /*
715 * Shutdown timeout of init(8).
716 * Unused within kernel, but used to control init(8), hence do not remove.
717 */
718 #ifndef INIT_SHUTDOWN_TIMEOUT
719 #define INIT_SHUTDOWN_TIMEOUT 120
720 #endif
721 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT;
722 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout,
723 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). "
724 "Unused within kernel, but used to control init(8)");
725
726 /*
727 * Start the initial user process; try exec'ing each pathname in init_path.
728 * The program is invoked with one argument containing the boot flags.
729 */
730 static void
start_init(void * dummy)731 start_init(void *dummy)
732 {
733 struct image_args args;
734 int error;
735 char *var, *path;
736 char *free_init_path, *tmp_init_path;
737 struct thread *td;
738 struct proc *p;
739 struct vmspace *oldvmspace;
740
741 TSENTER(); /* Here so we don't overlap with mi_startup. */
742
743 td = curthread;
744 p = td->td_proc;
745
746 vfs_mountroot();
747
748 /* Wipe GELI passphrase from the environment. */
749 kern_unsetenv("kern.geom.eli.passphrase");
750
751 /* For Multicons, report which console is primary to both */
752 if (boothowto & RB_MULTIPLE) {
753 if (boothowto & RB_SERIAL)
754 printf("Dual Console: Serial Primary, Video Secondary\n");
755 else
756 printf("Dual Console: Video Primary, Serial Secondary\n");
757 }
758
759 if ((var = kern_getenv("init_path")) != NULL) {
760 strlcpy(init_path, var, sizeof(init_path));
761 freeenv(var);
762 }
763 free_init_path = tmp_init_path = strdup(init_path, M_TEMP);
764
765 while ((path = strsep(&tmp_init_path, ":")) != NULL) {
766 if (bootverbose)
767 printf("start_init: trying %s\n", path);
768
769 memset(&args, 0, sizeof(args));
770 error = exec_alloc_args(&args);
771 if (error != 0)
772 panic("%s: Can't allocate space for init arguments %d",
773 __func__, error);
774
775 error = exec_args_add_fname(&args, path, UIO_SYSSPACE);
776 if (error != 0)
777 panic("%s: Can't add fname %d", __func__, error);
778 error = exec_args_add_arg(&args, path, UIO_SYSSPACE);
779 if (error != 0)
780 panic("%s: Can't add argv[0] %d", __func__, error);
781 if (boothowto & RB_SINGLE)
782 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE);
783 if (error != 0)
784 panic("%s: Can't add argv[0] %d", __func__, error);
785
786 /*
787 * Now try to exec the program. If can't for any reason
788 * other than it doesn't exist, complain.
789 *
790 * Otherwise, return via fork_trampoline() all the way
791 * to user mode as init!
792 */
793 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0,
794 ("nested execve"));
795 memset(td->td_frame, 0, sizeof(*td->td_frame));
796 oldvmspace = p->p_vmspace;
797 error = kern_execve(td, &args, NULL, oldvmspace);
798 KASSERT(error != 0,
799 ("kern_execve returned success, not EJUSTRETURN"));
800 if (error == EJUSTRETURN) {
801 exec_cleanup(td, oldvmspace);
802 free(free_init_path, M_TEMP);
803 TSEXIT();
804 return;
805 }
806 if (error != ENOENT)
807 printf("exec %s: error %d\n", path, error);
808 }
809 free(free_init_path, M_TEMP);
810 printf("init: not found in path %s\n", init_path);
811 panic("no init");
812 }
813
814 /*
815 * Like kproc_create(), but runs in its own address space. We do this
816 * early to reserve pid 1. Note special case - do not make it
817 * runnable yet, init execution is started when userspace can be served.
818 */
819 static void
create_init(const void * udata __unused)820 create_init(const void *udata __unused)
821 {
822 struct fork_req fr;
823 struct ucred *newcred, *oldcred;
824 struct thread *td;
825 int error;
826
827 bzero(&fr, sizeof(fr));
828 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED;
829 fr.fr_procp = &initproc;
830 error = fork1(&thread0, &fr);
831 if (error)
832 panic("cannot fork init: %d\n", error);
833 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1"));
834 /* divorce init's credentials from the kernel's */
835 newcred = crget();
836 sx_xlock(&proctree_lock);
837 PROC_LOCK(initproc);
838 initproc->p_flag |= P_SYSTEM | P_INMEM;
839 initproc->p_treeflag |= P_TREE_REAPER;
840 oldcred = initproc->p_ucred;
841 crcopy(newcred, oldcred);
842 #ifdef MAC
843 mac_cred_create_init(newcred);
844 #endif
845 #ifdef AUDIT
846 audit_cred_proc1(newcred);
847 #endif
848 proc_set_cred(initproc, newcred);
849 td = FIRST_THREAD_IN_PROC(initproc);
850 crcowfree(td);
851 td->td_realucred = crcowget(initproc->p_ucred);
852 td->td_ucred = td->td_realucred;
853 PROC_UNLOCK(initproc);
854 sx_xunlock(&proctree_lock);
855 crfree(oldcred);
856 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc),
857 start_init, NULL);
858 }
859 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL);
860
861 /*
862 * Make it runnable now.
863 */
864 static void
kick_init(const void * udata __unused)865 kick_init(const void *udata __unused)
866 {
867 struct thread *td;
868
869 td = FIRST_THREAD_IN_PROC(initproc);
870 thread_lock(td);
871 TD_SET_CAN_RUN(td);
872 sched_add(td, SRQ_BORING);
873 }
874 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL);
875
876 /*
877 * DDB(4).
878 */
879 #ifdef DDB
880 static void
db_show_print_syinit(struct sysinit * sip,bool ddb)881 db_show_print_syinit(struct sysinit *sip, bool ddb)
882 {
883 const char *sname, *funcname;
884 c_db_sym_t sym;
885 db_expr_t offset;
886
887 #define xprint(...) \
888 if (ddb) \
889 db_printf(__VA_ARGS__); \
890 else \
891 printf(__VA_ARGS__)
892
893 if (sip == NULL) {
894 xprint("%s: no sysinit * given\n", __func__);
895 return;
896 }
897
898 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset);
899 db_symbol_values(sym, &sname, NULL);
900 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset);
901 db_symbol_values(sym, &funcname, NULL);
902 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip);
903 xprint(" %#08x %#08x\n", sip->subsystem, sip->order);
904 xprint(" %p(%s)(%p)\n",
905 sip->func, (funcname != NULL) ? funcname : "", sip->udata);
906 #undef xprint
907 }
908
DB_SHOW_COMMAND_FLAGS(sysinit,db_show_sysinit,DB_CMD_MEMSAFE)909 DB_SHOW_COMMAND_FLAGS(sysinit, db_show_sysinit, DB_CMD_MEMSAFE)
910 {
911 struct sysinit *sip;
912
913 db_printf("SYSINIT vs Name(Ptr)\n");
914 db_printf(" Subsystem Order\n");
915 db_printf(" Function(Name)(Arg)\n");
916 STAILQ_FOREACH(sip, &sysinit_done_list, next) {
917 db_show_print_syinit(sip, true);
918 if (db_pager_quit)
919 return;
920 }
921 STAILQ_FOREACH(sip, &sysinit_list, next) {
922 db_show_print_syinit(sip, true);
923 if (db_pager_quit)
924 break;
925 }
926 }
927 #endif /* DDB */
928