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> 45 __FBSDID("$FreeBSD$"); 46 47 #include "opt_ddb.h" 48 #include "opt_init_path.h" 49 #include "opt_verbose_sysinit.h" 50 51 #include <sys/param.h> 52 #include <sys/kernel.h> 53 #include <sys/exec.h> 54 #include <sys/file.h> 55 #include <sys/filedesc.h> 56 #include <sys/jail.h> 57 #include <sys/ktr.h> 58 #include <sys/lock.h> 59 #include <sys/loginclass.h> 60 #include <sys/mount.h> 61 #include <sys/mutex.h> 62 #include <sys/syscallsubr.h> 63 #include <sys/sysctl.h> 64 #include <sys/proc.h> 65 #include <sys/racct.h> 66 #include <sys/resourcevar.h> 67 #include <sys/systm.h> 68 #include <sys/signalvar.h> 69 #include <sys/vnode.h> 70 #include <sys/sysent.h> 71 #include <sys/reboot.h> 72 #include <sys/sched.h> 73 #include <sys/sx.h> 74 #include <sys/sysproto.h> 75 #include <sys/vmmeter.h> 76 #include <sys/unistd.h> 77 #include <sys/malloc.h> 78 #include <sys/conf.h> 79 #include <sys/cpuset.h> 80 81 #include <machine/cpu.h> 82 83 #include <security/audit/audit.h> 84 #include <security/mac/mac_framework.h> 85 86 #include <vm/vm.h> 87 #include <vm/vm_param.h> 88 #include <vm/pmap.h> 89 #include <vm/vm_map.h> 90 #include <vm/vm_domain.h> 91 #include <sys/copyright.h> 92 93 #include <ddb/ddb.h> 94 #include <ddb/db_sym.h> 95 96 void mi_startup(void); /* Should be elsewhere */ 97 98 /* Components of the first process -- never freed. */ 99 static struct session session0; 100 static struct pgrp pgrp0; 101 struct proc proc0; 102 struct thread thread0 __aligned(16); 103 struct vmspace vmspace0; 104 struct proc *initproc; 105 106 #ifndef BOOTHOWTO 107 #define BOOTHOWTO 0 108 #endif 109 int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 110 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 111 "Boot control flags, passed from loader"); 112 113 #ifndef BOOTVERBOSE 114 #define BOOTVERBOSE 0 115 #endif 116 int bootverbose = BOOTVERBOSE; 117 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 118 "Control the output of verbose kernel messages"); 119 120 #ifdef INVARIANTS 121 FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 122 #endif 123 124 /* 125 * This ensures that there is at least one entry so that the sysinit_set 126 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 127 * executed. 128 */ 129 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 130 131 /* 132 * The sysinit table itself. Items are checked off as the are run. 133 * If we want to register new sysinit types, add them to newsysinit. 134 */ 135 SET_DECLARE(sysinit_set, struct sysinit); 136 struct sysinit **sysinit, **sysinit_end; 137 struct sysinit **newsysinit, **newsysinit_end; 138 139 /* 140 * Merge a new sysinit set into the current set, reallocating it if 141 * necessary. This can only be called after malloc is running. 142 */ 143 void 144 sysinit_add(struct sysinit **set, struct sysinit **set_end) 145 { 146 struct sysinit **newset; 147 struct sysinit **sipp; 148 struct sysinit **xipp; 149 int count; 150 151 count = set_end - set; 152 if (newsysinit) 153 count += newsysinit_end - newsysinit; 154 else 155 count += sysinit_end - sysinit; 156 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 157 if (newset == NULL) 158 panic("cannot malloc for sysinit"); 159 xipp = newset; 160 if (newsysinit) 161 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 162 *xipp++ = *sipp; 163 else 164 for (sipp = sysinit; sipp < sysinit_end; sipp++) 165 *xipp++ = *sipp; 166 for (sipp = set; sipp < set_end; sipp++) 167 *xipp++ = *sipp; 168 if (newsysinit) 169 free(newsysinit, M_TEMP); 170 newsysinit = newset; 171 newsysinit_end = newset + count; 172 } 173 174 #if defined (DDB) && defined(VERBOSE_SYSINIT) 175 static const char * 176 symbol_name(vm_offset_t va, db_strategy_t strategy) 177 { 178 const char *name; 179 c_db_sym_t sym; 180 db_expr_t offset; 181 182 if (va == 0) 183 return (NULL); 184 sym = db_search_symbol(va, strategy, &offset); 185 if (offset != 0) 186 return (NULL); 187 db_symbol_values(sym, &name, NULL); 188 return (name); 189 } 190 #endif 191 192 /* 193 * System startup; initialize the world, create process 0, mount root 194 * filesystem, and fork to create init and pagedaemon. Most of the 195 * hard work is done in the lower-level initialization routines including 196 * startup(), which does memory initialization and autoconfiguration. 197 * 198 * This allows simple addition of new kernel subsystems that require 199 * boot time initialization. It also allows substitution of subsystem 200 * (for instance, a scheduler, kernel profiler, or VM system) by object 201 * module. Finally, it allows for optional "kernel threads". 202 */ 203 void 204 mi_startup(void) 205 { 206 207 register struct sysinit **sipp; /* system initialization*/ 208 register struct sysinit **xipp; /* interior loop of sort*/ 209 register struct sysinit *save; /* bubble*/ 210 211 #if defined(VERBOSE_SYSINIT) 212 int last; 213 int verbose; 214 #endif 215 216 if (boothowto & RB_VERBOSE) 217 bootverbose++; 218 219 if (sysinit == NULL) { 220 sysinit = SET_BEGIN(sysinit_set); 221 sysinit_end = SET_LIMIT(sysinit_set); 222 } 223 224 restart: 225 /* 226 * Perform a bubble sort of the system initialization objects by 227 * their subsystem (primary key) and order (secondary key). 228 */ 229 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 230 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 231 if ((*sipp)->subsystem < (*xipp)->subsystem || 232 ((*sipp)->subsystem == (*xipp)->subsystem && 233 (*sipp)->order <= (*xipp)->order)) 234 continue; /* skip*/ 235 save = *sipp; 236 *sipp = *xipp; 237 *xipp = save; 238 } 239 } 240 241 #if defined(VERBOSE_SYSINIT) 242 last = SI_SUB_COPYRIGHT; 243 verbose = 0; 244 #if !defined(DDB) 245 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 246 #endif 247 #endif 248 249 /* 250 * Traverse the (now) ordered list of system initialization tasks. 251 * Perform each task, and continue on to the next task. 252 */ 253 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 254 255 if ((*sipp)->subsystem == SI_SUB_DUMMY) 256 continue; /* skip dummy task(s)*/ 257 258 if ((*sipp)->subsystem == SI_SUB_DONE) 259 continue; 260 261 #if defined(VERBOSE_SYSINIT) 262 if ((*sipp)->subsystem > last) { 263 verbose = 1; 264 last = (*sipp)->subsystem; 265 printf("subsystem %x\n", last); 266 } 267 if (verbose) { 268 #if defined(DDB) 269 const char *func, *data; 270 271 func = symbol_name((vm_offset_t)(*sipp)->func, 272 DB_STGY_PROC); 273 data = symbol_name((vm_offset_t)(*sipp)->udata, 274 DB_STGY_ANY); 275 if (func != NULL && data != NULL) 276 printf(" %s(&%s)... ", func, data); 277 else if (func != NULL) 278 printf(" %s(%p)... ", func, (*sipp)->udata); 279 else 280 #endif 281 printf(" %p(%p)... ", (*sipp)->func, 282 (*sipp)->udata); 283 } 284 #endif 285 286 /* Call function */ 287 (*((*sipp)->func))((*sipp)->udata); 288 289 #if defined(VERBOSE_SYSINIT) 290 if (verbose) 291 printf("done.\n"); 292 #endif 293 294 /* Check off the one we're just done */ 295 (*sipp)->subsystem = SI_SUB_DONE; 296 297 /* Check if we've installed more sysinit items via KLD */ 298 if (newsysinit != NULL) { 299 if (sysinit != SET_BEGIN(sysinit_set)) 300 free(sysinit, M_TEMP); 301 sysinit = newsysinit; 302 sysinit_end = newsysinit_end; 303 newsysinit = NULL; 304 newsysinit_end = NULL; 305 goto restart; 306 } 307 } 308 309 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 310 mtx_unlock(&Giant); 311 312 /* 313 * Now hand over this thread to swapper. 314 */ 315 swapper(); 316 /* NOTREACHED*/ 317 } 318 319 320 /* 321 *************************************************************************** 322 **** 323 **** The following SYSINIT's belong elsewhere, but have not yet 324 **** been moved. 325 **** 326 *************************************************************************** 327 */ 328 static void 329 print_caddr_t(void *data) 330 { 331 printf("%s", (char *)data); 332 } 333 334 static void 335 print_version(void *data __unused) 336 { 337 int len; 338 339 /* Strip a trailing newline from version. */ 340 len = strlen(version); 341 while (len > 0 && version[len - 1] == '\n') 342 len--; 343 printf("%.*s %s\n", len, version, machine); 344 printf("%s\n", compiler_version); 345 } 346 347 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 348 copyright); 349 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 350 trademark); 351 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 352 353 #ifdef WITNESS 354 static char wit_warn[] = 355 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 356 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 1, 357 print_caddr_t, wit_warn); 358 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_THIRD + 1, 359 print_caddr_t, wit_warn); 360 #endif 361 362 #ifdef DIAGNOSTIC 363 static char diag_warn[] = 364 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 365 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 2, 366 print_caddr_t, diag_warn); 367 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_THIRD + 2, 368 print_caddr_t, diag_warn); 369 #endif 370 371 static int 372 null_fetch_syscall_args(struct thread *td __unused, 373 struct syscall_args *sa __unused) 374 { 375 376 panic("null_fetch_syscall_args"); 377 } 378 379 static void 380 null_set_syscall_retval(struct thread *td __unused, int error __unused) 381 { 382 383 panic("null_set_syscall_retval"); 384 } 385 386 struct sysentvec null_sysvec = { 387 .sv_size = 0, 388 .sv_table = NULL, 389 .sv_mask = 0, 390 .sv_errsize = 0, 391 .sv_errtbl = NULL, 392 .sv_transtrap = NULL, 393 .sv_fixup = NULL, 394 .sv_sendsig = NULL, 395 .sv_sigcode = NULL, 396 .sv_szsigcode = NULL, 397 .sv_name = "null", 398 .sv_coredump = NULL, 399 .sv_imgact_try = NULL, 400 .sv_minsigstksz = 0, 401 .sv_pagesize = PAGE_SIZE, 402 .sv_minuser = VM_MIN_ADDRESS, 403 .sv_maxuser = VM_MAXUSER_ADDRESS, 404 .sv_usrstack = USRSTACK, 405 .sv_psstrings = PS_STRINGS, 406 .sv_stackprot = VM_PROT_ALL, 407 .sv_copyout_strings = NULL, 408 .sv_setregs = NULL, 409 .sv_fixlimit = NULL, 410 .sv_maxssiz = NULL, 411 .sv_flags = 0, 412 .sv_set_syscall_retval = null_set_syscall_retval, 413 .sv_fetch_syscall_args = null_fetch_syscall_args, 414 .sv_syscallnames = NULL, 415 .sv_schedtail = NULL, 416 .sv_thread_detach = NULL, 417 .sv_trap = NULL, 418 }; 419 420 /* 421 *************************************************************************** 422 **** 423 **** The two following SYSINIT's are proc0 specific glue code. I am not 424 **** convinced that they can not be safely combined, but their order of 425 **** operation has been maintained as the same as the original init_main.c 426 **** for right now. 427 **** 428 **** These probably belong in init_proc.c or kern_proc.c, since they 429 **** deal with proc0 (the fork template process). 430 **** 431 *************************************************************************** 432 */ 433 /* ARGSUSED*/ 434 static void 435 proc0_init(void *dummy __unused) 436 { 437 struct proc *p; 438 struct thread *td; 439 struct ucred *newcred; 440 vm_paddr_t pageablemem; 441 int i; 442 443 GIANT_REQUIRED; 444 p = &proc0; 445 td = &thread0; 446 447 /* 448 * Initialize magic number and osrel. 449 */ 450 p->p_magic = P_MAGIC; 451 p->p_osrel = osreldate; 452 453 /* 454 * Initialize thread and process structures. 455 */ 456 procinit(); /* set up proc zone */ 457 threadinit(); /* set up UMA zones */ 458 459 /* 460 * Initialise scheduler resources. 461 * Add scheduler specific parts to proc, thread as needed. 462 */ 463 schedinit(); /* scheduler gets its house in order */ 464 465 /* 466 * Create process 0 (the swapper). 467 */ 468 LIST_INSERT_HEAD(&allproc, p, p_list); 469 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 470 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 471 p->p_pgrp = &pgrp0; 472 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 473 LIST_INIT(&pgrp0.pg_members); 474 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 475 476 pgrp0.pg_session = &session0; 477 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 478 refcount_init(&session0.s_count, 1); 479 session0.s_leader = p; 480 481 p->p_sysent = &null_sysvec; 482 p->p_flag = P_SYSTEM | P_INMEM; 483 p->p_flag2 = 0; 484 p->p_state = PRS_NORMAL; 485 knlist_init_mtx(&p->p_klist, &p->p_mtx); 486 STAILQ_INIT(&p->p_ktr); 487 p->p_nice = NZERO; 488 /* pid_max cannot be greater than PID_MAX */ 489 td->td_tid = PID_MAX + 1; 490 LIST_INSERT_HEAD(TIDHASH(td->td_tid), td, td_hash); 491 td->td_state = TDS_RUNNING; 492 td->td_pri_class = PRI_TIMESHARE; 493 td->td_user_pri = PUSER; 494 td->td_base_user_pri = PUSER; 495 td->td_lend_user_pri = PRI_MAX; 496 td->td_priority = PVM; 497 td->td_base_pri = PVM; 498 td->td_oncpu = 0; 499 td->td_flags = TDF_INMEM; 500 td->td_pflags = TDP_KTHREAD; 501 td->td_cpuset = cpuset_thread0(); 502 vm_domain_policy_init(&td->td_vm_dom_policy); 503 vm_domain_policy_set(&td->td_vm_dom_policy, VM_POLICY_NONE, -1); 504 vm_domain_policy_init(&p->p_vm_dom_policy); 505 vm_domain_policy_set(&p->p_vm_dom_policy, VM_POLICY_NONE, -1); 506 prison0_init(); 507 p->p_peers = 0; 508 p->p_leader = p; 509 p->p_reaper = p; 510 LIST_INIT(&p->p_reaplist); 511 512 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 513 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 514 515 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 516 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 517 callout_init(&td->td_slpcallout, 1); 518 519 /* Create credentials. */ 520 newcred = crget(); 521 newcred->cr_ngroups = 1; /* group 0 */ 522 newcred->cr_uidinfo = uifind(0); 523 newcred->cr_ruidinfo = uifind(0); 524 newcred->cr_prison = &prison0; 525 newcred->cr_loginclass = loginclass_find("default"); 526 proc_set_cred_init(p, newcred); 527 #ifdef AUDIT 528 audit_cred_kproc0(newcred); 529 #endif 530 #ifdef MAC 531 mac_cred_create_swapper(newcred); 532 #endif 533 /* Create sigacts. */ 534 p->p_sigacts = sigacts_alloc(); 535 536 /* Initialize signal state for process 0. */ 537 siginit(&proc0); 538 539 /* Create the file descriptor table. */ 540 p->p_fd = fdinit(NULL, false); 541 p->p_fdtol = NULL; 542 543 /* Create the limits structures. */ 544 p->p_limit = lim_alloc(); 545 for (i = 0; i < RLIM_NLIMITS; i++) 546 p->p_limit->pl_rlimit[i].rlim_cur = 547 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 548 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 549 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 550 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 551 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 552 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 553 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 554 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 555 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 556 /* Cast to avoid overflow on i386/PAE. */ 557 pageablemem = ptoa((vm_paddr_t)vm_cnt.v_free_count); 558 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 559 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 560 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 561 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 562 p->p_cpulimit = RLIM_INFINITY; 563 564 PROC_LOCK(p); 565 thread_cow_get_proc(td, p); 566 PROC_UNLOCK(p); 567 568 /* Initialize resource accounting structures. */ 569 racct_create(&p->p_racct); 570 571 p->p_stats = pstats_alloc(); 572 573 /* Allocate a prototype map so we have something to fork. */ 574 p->p_vmspace = &vmspace0; 575 vmspace0.vm_refcnt = 1; 576 pmap_pinit0(vmspace_pmap(&vmspace0)); 577 578 /* 579 * proc0 is not expected to enter usermode, so there is no special 580 * handling for sv_minuser here, like is done for exec_new_vmspace(). 581 */ 582 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 583 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 584 585 /* 586 * Call the init and ctor for the new thread and proc. We wait 587 * to do this until all other structures are fairly sane. 588 */ 589 EVENTHANDLER_INVOKE(process_init, p); 590 EVENTHANDLER_INVOKE(thread_init, td); 591 EVENTHANDLER_INVOKE(process_ctor, p); 592 EVENTHANDLER_INVOKE(thread_ctor, td); 593 594 /* 595 * Charge root for one process. 596 */ 597 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 598 PROC_LOCK(p); 599 racct_add_force(p, RACCT_NPROC, 1); 600 PROC_UNLOCK(p); 601 } 602 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 603 604 /* ARGSUSED*/ 605 static void 606 proc0_post(void *dummy __unused) 607 { 608 struct timespec ts; 609 struct proc *p; 610 struct rusage ru; 611 struct thread *td; 612 613 /* 614 * Now we can look at the time, having had a chance to verify the 615 * time from the filesystem. Pretend that proc0 started now. 616 */ 617 sx_slock(&allproc_lock); 618 FOREACH_PROC_IN_SYSTEM(p) { 619 microuptime(&p->p_stats->p_start); 620 PROC_STATLOCK(p); 621 rufetch(p, &ru); /* Clears thread stats */ 622 PROC_STATUNLOCK(p); 623 p->p_rux.rux_runtime = 0; 624 p->p_rux.rux_uticks = 0; 625 p->p_rux.rux_sticks = 0; 626 p->p_rux.rux_iticks = 0; 627 FOREACH_THREAD_IN_PROC(p, td) { 628 td->td_runtime = 0; 629 } 630 } 631 sx_sunlock(&allproc_lock); 632 PCPU_SET(switchtime, cpu_ticks()); 633 PCPU_SET(switchticks, ticks); 634 635 /* 636 * Give the ``random'' number generator a thump. 637 */ 638 nanotime(&ts); 639 srandom(ts.tv_sec ^ ts.tv_nsec); 640 } 641 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 642 643 static void 644 random_init(void *dummy __unused) 645 { 646 647 /* 648 * After CPU has been started we have some randomness on most 649 * platforms via get_cyclecount(). For platforms that don't 650 * we will reseed random(9) in proc0_post() as well. 651 */ 652 srandom(get_cyclecount()); 653 } 654 SYSINIT(random, SI_SUB_RANDOM, SI_ORDER_FIRST, random_init, NULL); 655 656 /* 657 *************************************************************************** 658 **** 659 **** The following SYSINIT's and glue code should be moved to the 660 **** respective files on a per subsystem basis. 661 **** 662 *************************************************************************** 663 */ 664 665 666 /* 667 *************************************************************************** 668 **** 669 **** The following code probably belongs in another file, like 670 **** kern/init_init.c. 671 **** 672 *************************************************************************** 673 */ 674 675 /* 676 * List of paths to try when searching for "init". 677 */ 678 static char init_path[MAXPATHLEN] = 679 #ifdef INIT_PATH 680 __XSTRING(INIT_PATH); 681 #else 682 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 683 #endif 684 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 685 "Path used to search the init process"); 686 687 /* 688 * Shutdown timeout of init(8). 689 * Unused within kernel, but used to control init(8), hence do not remove. 690 */ 691 #ifndef INIT_SHUTDOWN_TIMEOUT 692 #define INIT_SHUTDOWN_TIMEOUT 120 693 #endif 694 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 695 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 696 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 697 "Unused within kernel, but used to control init(8)"); 698 699 /* 700 * Start the initial user process; try exec'ing each pathname in init_path. 701 * The program is invoked with one argument containing the boot flags. 702 */ 703 static void 704 start_init(void *dummy) 705 { 706 vm_offset_t addr; 707 struct execve_args args; 708 int options, error; 709 char *var, *path, *next, *s; 710 char *ucp, **uap, *arg0, *arg1; 711 struct thread *td; 712 struct proc *p; 713 714 mtx_lock(&Giant); 715 716 GIANT_REQUIRED; 717 718 td = curthread; 719 p = td->td_proc; 720 721 vfs_mountroot(); 722 723 /* Wipe GELI passphrase from the environment. */ 724 kern_unsetenv("kern.geom.eli.passphrase"); 725 726 /* 727 * Need just enough stack to hold the faked-up "execve()" arguments. 728 */ 729 addr = p->p_sysent->sv_usrstack - PAGE_SIZE; 730 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE, 0, 731 VMFS_NO_SPACE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0) 732 panic("init: couldn't allocate argument space"); 733 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 734 p->p_vmspace->vm_ssize = 1; 735 736 if ((var = kern_getenv("init_path")) != NULL) { 737 strlcpy(init_path, var, sizeof(init_path)); 738 freeenv(var); 739 } 740 741 for (path = init_path; *path != '\0'; path = next) { 742 while (*path == ':') 743 path++; 744 if (*path == '\0') 745 break; 746 for (next = path; *next != '\0' && *next != ':'; next++) 747 /* nothing */ ; 748 if (bootverbose) 749 printf("start_init: trying %.*s\n", (int)(next - path), 750 path); 751 752 /* 753 * Move out the boot flag argument. 754 */ 755 options = 0; 756 ucp = (char *)p->p_sysent->sv_usrstack; 757 (void)subyte(--ucp, 0); /* trailing zero */ 758 if (boothowto & RB_SINGLE) { 759 (void)subyte(--ucp, 's'); 760 options = 1; 761 } 762 #ifdef notyet 763 if (boothowto & RB_FASTBOOT) { 764 (void)subyte(--ucp, 'f'); 765 options = 1; 766 } 767 #endif 768 769 #ifdef BOOTCDROM 770 (void)subyte(--ucp, 'C'); 771 options = 1; 772 #endif 773 774 if (options == 0) 775 (void)subyte(--ucp, '-'); 776 (void)subyte(--ucp, '-'); /* leading hyphen */ 777 arg1 = ucp; 778 779 /* 780 * Move out the file name (also arg 0). 781 */ 782 (void)subyte(--ucp, 0); 783 for (s = next - 1; s >= path; s--) 784 (void)subyte(--ucp, *s); 785 arg0 = ucp; 786 787 /* 788 * Move out the arg pointers. 789 */ 790 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 791 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 792 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 793 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 794 795 /* 796 * Point at the arguments. 797 */ 798 args.fname = arg0; 799 args.argv = uap; 800 args.envv = NULL; 801 802 /* 803 * Now try to exec the program. If can't for any reason 804 * other than it doesn't exist, complain. 805 * 806 * Otherwise, return via fork_trampoline() all the way 807 * to user mode as init! 808 */ 809 if ((error = sys_execve(td, &args)) == 0) { 810 mtx_unlock(&Giant); 811 return; 812 } 813 if (error != ENOENT) 814 printf("exec %.*s: error %d\n", (int)(next - path), 815 path, error); 816 } 817 printf("init: not found in path %s\n", init_path); 818 panic("no init"); 819 } 820 821 /* 822 * Like kproc_create(), but runs in it's own address space. 823 * We do this early to reserve pid 1. 824 * 825 * Note special case - do not make it runnable yet. Other work 826 * in progress will change this more. 827 */ 828 static void 829 create_init(const void *udata __unused) 830 { 831 struct ucred *newcred, *oldcred; 832 struct thread *td; 833 int error; 834 835 error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc, 836 NULL, 0, NULL); 837 if (error) 838 panic("cannot fork init: %d\n", error); 839 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 840 /* divorce init's credentials from the kernel's */ 841 newcred = crget(); 842 sx_xlock(&proctree_lock); 843 PROC_LOCK(initproc); 844 initproc->p_flag |= P_SYSTEM | P_INMEM; 845 initproc->p_treeflag |= P_TREE_REAPER; 846 LIST_INSERT_HEAD(&initproc->p_reaplist, &proc0, p_reapsibling); 847 oldcred = initproc->p_ucred; 848 crcopy(newcred, oldcred); 849 #ifdef MAC 850 mac_cred_create_init(newcred); 851 #endif 852 #ifdef AUDIT 853 audit_cred_proc1(newcred); 854 #endif 855 proc_set_cred(initproc, newcred); 856 td = FIRST_THREAD_IN_PROC(initproc); 857 crfree(td->td_ucred); 858 td->td_ucred = crhold(initproc->p_ucred); 859 PROC_UNLOCK(initproc); 860 sx_xunlock(&proctree_lock); 861 crfree(oldcred); 862 cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL); 863 } 864 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 865 866 /* 867 * Make it runnable now. 868 */ 869 static void 870 kick_init(const void *udata __unused) 871 { 872 struct thread *td; 873 874 td = FIRST_THREAD_IN_PROC(initproc); 875 thread_lock(td); 876 TD_SET_CAN_RUN(td); 877 sched_add(td, SRQ_BORING); 878 thread_unlock(td); 879 } 880 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 881