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 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 44 */ 45 46#include <sys/cdefs.h> 47__FBSDID("$FreeBSD$"); 48 49#include "opt_ddb.h" 50#include "opt_init_path.h" 51#include "opt_verbose_sysinit.h" 52 53#include <sys/param.h> 54#include <sys/kernel.h> 55#include <sys/exec.h> 56#include <sys/file.h> 57#include <sys/filedesc.h> 58#include <sys/jail.h> 59#include <sys/ktr.h> 60#include <sys/lock.h> 61#include <sys/loginclass.h> 62#include <sys/mount.h> 63#include <sys/mutex.h> 64#include <sys/syscallsubr.h> 65#include <sys/sysctl.h> 66#include <sys/proc.h> 67#include <sys/racct.h> 68#include <sys/resourcevar.h> 69#include <sys/systm.h> 70#include <sys/signalvar.h> 71#include <sys/vnode.h> 72#include <sys/sysent.h> 73#include <sys/reboot.h> 74#include <sys/sched.h> 75#include <sys/sx.h> 76#include <sys/sysproto.h> 77#include <sys/vmmeter.h> 78#include <sys/unistd.h> 79#include <sys/malloc.h> 80#include <sys/conf.h> 81#include <sys/cpuset.h> 82 83#include <machine/cpu.h> 84 85#include <security/audit/audit.h> 86#include <security/mac/mac_framework.h> 87 88#include <vm/vm.h> 89#include <vm/vm_param.h> 90#include <vm/vm_extern.h> 91#include <vm/pmap.h> 92#include <vm/vm_map.h> 93#include <sys/copyright.h> 94 95#include <ddb/ddb.h> 96#include <ddb/db_sym.h> 97 98void mi_startup(void); /* Should be elsewhere */ 99 100/* Components of the first process -- never freed. */ 101static struct session session0; 102static struct pgrp pgrp0; 103struct proc proc0; 104struct thread0_storage thread0_st __aligned(32); 105struct vmspace vmspace0; 106struct proc *initproc; 107 108#ifndef BOOTHOWTO 109#define BOOTHOWTO 0 110#endif 111int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 112SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 113 "Boot control flags, passed from loader"); 114 115#ifndef BOOTVERBOSE 116#define BOOTVERBOSE 0 117#endif 118int bootverbose = BOOTVERBOSE; 119SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 120 "Control the output of verbose kernel messages"); 121 122#ifdef VERBOSE_SYSINIT 123/* 124 * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to 125 * dictate the default VERBOSE_SYSINIT behavior. Significant values for this 126 * option and associated tunable are: 127 * - 0, 'compiled in but silent by default' 128 * - 1, 'compiled in but verbose by default' (default) 129 */ 130int verbose_sysinit = VERBOSE_SYSINIT; 131TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit); 132#endif 133 134#ifdef INVARIANTS 135FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 136#endif 137 138/* 139 * This ensures that there is at least one entry so that the sysinit_set 140 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 141 * executed. 142 */ 143SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 144 145/* 146 * The sysinit table itself. Items are checked off as the are run. 147 * If we want to register new sysinit types, add them to newsysinit. 148 */ 149SET_DECLARE(sysinit_set, struct sysinit); 150struct sysinit **sysinit, **sysinit_end; 151struct sysinit **newsysinit, **newsysinit_end; 152 153EVENTHANDLER_LIST_DECLARE(process_init); 154EVENTHANDLER_LIST_DECLARE(thread_init); 155EVENTHANDLER_LIST_DECLARE(process_ctor); 156EVENTHANDLER_LIST_DECLARE(thread_ctor); 157 158/* 159 * Merge a new sysinit set into the current set, reallocating it if 160 * necessary. This can only be called after malloc is running. 161 */ 162void 163sysinit_add(struct sysinit **set, struct sysinit **set_end) 164{ 165 struct sysinit **newset; 166 struct sysinit **sipp; 167 struct sysinit **xipp; 168 int count; 169 170 count = set_end - set; 171 if (newsysinit) 172 count += newsysinit_end - newsysinit; 173 else 174 count += sysinit_end - sysinit; 175 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 176 if (newset == NULL) 177 panic("cannot malloc for sysinit"); 178 xipp = newset; 179 if (newsysinit) 180 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 181 *xipp++ = *sipp; 182 else 183 for (sipp = sysinit; sipp < sysinit_end; sipp++) 184 *xipp++ = *sipp; 185 for (sipp = set; sipp < set_end; sipp++) 186 *xipp++ = *sipp; 187 if (newsysinit) 188 free(newsysinit, M_TEMP); 189 newsysinit = newset; 190 newsysinit_end = newset + count; 191} 192 193#if defined (DDB) && defined(VERBOSE_SYSINIT) 194static const char * 195symbol_name(vm_offset_t va, db_strategy_t strategy) 196{ 197 const char *name; 198 c_db_sym_t sym; 199 db_expr_t offset; 200 201 if (va == 0) 202 return (NULL); 203 sym = db_search_symbol(va, strategy, &offset); 204 if (offset != 0) 205 return (NULL); 206 db_symbol_values(sym, &name, NULL); 207 return (name); 208} 209#endif 210 211/* 212 * System startup; initialize the world, create process 0, mount root 213 * filesystem, and fork to create init and pagedaemon. Most of the 214 * hard work is done in the lower-level initialization routines including 215 * startup(), which does memory initialization and autoconfiguration. 216 * 217 * This allows simple addition of new kernel subsystems that require 218 * boot time initialization. It also allows substitution of subsystem 219 * (for instance, a scheduler, kernel profiler, or VM system) by object 220 * module. Finally, it allows for optional "kernel threads". 221 */ 222void 223mi_startup(void) 224{ 225 226 struct sysinit **sipp; /* system initialization*/ 227 struct sysinit **xipp; /* interior loop of sort*/ 228 struct sysinit *save; /* bubble*/ 229 230#if defined(VERBOSE_SYSINIT) 231 int last; 232 int verbose; 233#endif 234 235 TSENTER(); 236 237 if (boothowto & RB_VERBOSE) 238 bootverbose++; 239 240 if (sysinit == NULL) { 241 sysinit = SET_BEGIN(sysinit_set); 242 sysinit_end = SET_LIMIT(sysinit_set); 243 } 244 245restart: 246 /* 247 * Perform a bubble sort of the system initialization objects by 248 * their subsystem (primary key) and order (secondary key). 249 */ 250 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 251 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 252 if ((*sipp)->subsystem < (*xipp)->subsystem || 253 ((*sipp)->subsystem == (*xipp)->subsystem && 254 (*sipp)->order <= (*xipp)->order)) 255 continue; /* skip*/ 256 save = *sipp; 257 *sipp = *xipp; 258 *xipp = save; 259 } 260 } 261 262#if defined(VERBOSE_SYSINIT) 263 last = SI_SUB_COPYRIGHT; 264 verbose = 0; 265#if !defined(DDB) 266 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 267#endif 268#endif 269 270 /* 271 * Traverse the (now) ordered list of system initialization tasks. 272 * Perform each task, and continue on to the next task. 273 */ 274 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 275 276 if ((*sipp)->subsystem == SI_SUB_DUMMY) 277 continue; /* skip dummy task(s)*/ 278 279 if ((*sipp)->subsystem == SI_SUB_DONE) 280 continue; 281 282#if defined(VERBOSE_SYSINIT) 283 if ((*sipp)->subsystem > last && verbose_sysinit != 0) { 284 verbose = 1; 285 last = (*sipp)->subsystem; 286 printf("subsystem %x\n", last); 287 } 288 if (verbose) { 289#if defined(DDB) 290 const char *func, *data; 291 292 func = symbol_name((vm_offset_t)(*sipp)->func, 293 DB_STGY_PROC); 294 data = symbol_name((vm_offset_t)(*sipp)->udata, 295 DB_STGY_ANY); 296 if (func != NULL && data != NULL) 297 printf(" %s(&%s)... ", func, data); 298 else if (func != NULL) 299 printf(" %s(%p)... ", func, (*sipp)->udata); 300 else 301#endif 302 printf(" %p(%p)... ", (*sipp)->func, 303 (*sipp)->udata); 304 } 305#endif 306 307 /* Call function */ 308 (*((*sipp)->func))((*sipp)->udata); 309 310#if defined(VERBOSE_SYSINIT) 311 if (verbose) 312 printf("done.\n"); 313#endif 314 315 /* Check off the one we're just done */ 316 (*sipp)->subsystem = SI_SUB_DONE; 317 318 /* Check if we've installed more sysinit items via KLD */ 319 if (newsysinit != NULL) { 320 if (sysinit != SET_BEGIN(sysinit_set)) 321 free(sysinit, M_TEMP); 322 sysinit = newsysinit; 323 sysinit_end = newsysinit_end; 324 newsysinit = NULL; 325 newsysinit_end = NULL; 326 goto restart; 327 } 328 } 329 330 TSEXIT(); /* Here so we don't overlap with start_init. */ 331 332 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 333 mtx_unlock(&Giant); 334 335 /* 336 * Now hand over this thread to swapper. 337 */ 338 swapper(); 339 /* NOTREACHED*/ 340} 341 342static void 343print_caddr_t(void *data) 344{ 345 printf("%s", (char *)data); 346} 347 348static void 349print_version(void *data __unused) 350{ 351 int len; 352 353 /* Strip a trailing newline from version. */ 354 len = strlen(version); 355 while (len > 0 && version[len - 1] == '\n') 356 len--; 357 printf("%.*s %s\n", len, version, machine); 358 printf("%s\n", compiler_version); 359} 360 361SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 362 copyright); 363SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 364 trademark); 365SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 366 367#ifdef WITNESS 368static char wit_warn[] = 369 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 370SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH, 371 print_caddr_t, wit_warn); 372SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH, 373 print_caddr_t, wit_warn); 374#endif 375 376#ifdef DIAGNOSTIC 377static char diag_warn[] = 378 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 379SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 380 print_caddr_t, diag_warn); 381SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH, 382 print_caddr_t, diag_warn); 383#endif 384 385static int 386null_fetch_syscall_args(struct thread *td __unused) 387{ 388 389 panic("null_fetch_syscall_args"); 390} 391 392static void 393null_set_syscall_retval(struct thread *td __unused, int error __unused) 394{ 395 396 panic("null_set_syscall_retval"); 397} 398 399struct sysentvec null_sysvec = { 400 .sv_size = 0, 401 .sv_table = NULL, 402 .sv_mask = 0, 403 .sv_errsize = 0, 404 .sv_errtbl = NULL, 405 .sv_transtrap = NULL, 406 .sv_fixup = NULL, 407 .sv_sendsig = NULL, 408 .sv_sigcode = NULL, 409 .sv_szsigcode = NULL, 410 .sv_name = "null", 411 .sv_coredump = NULL, 412 .sv_imgact_try = NULL, 413 .sv_minsigstksz = 0, 414 .sv_minuser = VM_MIN_ADDRESS, 415 .sv_maxuser = VM_MAXUSER_ADDRESS, 416 .sv_usrstack = USRSTACK, 417 .sv_psstrings = PS_STRINGS, 418 .sv_stackprot = VM_PROT_ALL, 419 .sv_copyout_strings = NULL, 420 .sv_setregs = NULL, 421 .sv_fixlimit = NULL, 422 .sv_maxssiz = NULL, 423 .sv_flags = 0, 424 .sv_set_syscall_retval = null_set_syscall_retval, 425 .sv_fetch_syscall_args = null_fetch_syscall_args, 426 .sv_syscallnames = NULL, 427 .sv_schedtail = NULL, 428 .sv_thread_detach = NULL, 429 .sv_trap = NULL, 430}; 431 432/* 433 * The two following SYSINIT's are proc0 specific glue code. I am not 434 * convinced that they can not be safely combined, but their order of 435 * operation has been maintained as the same as the original init_main.c 436 * for right now. 437 */ 438/* ARGSUSED*/ 439static void 440proc0_init(void *dummy __unused) 441{ 442 struct proc *p; 443 struct thread *td; 444 struct ucred *newcred; 445 struct uidinfo tmpuinfo; 446 struct loginclass tmplc = { 447 .lc_name = "", 448 }; 449 vm_paddr_t pageablemem; 450 int i; 451 452 GIANT_REQUIRED; 453 p = &proc0; 454 td = &thread0; 455 456 /* 457 * Initialize magic number and osrel. 458 */ 459 p->p_magic = P_MAGIC; 460 p->p_osrel = osreldate; 461 462 /* 463 * Initialize thread and process structures. 464 */ 465 procinit(); /* set up proc zone */ 466 threadinit(); /* set up UMA zones */ 467 468 /* 469 * Initialise scheduler resources. 470 * Add scheduler specific parts to proc, thread as needed. 471 */ 472 schedinit(); /* scheduler gets its house in order */ 473 474 /* 475 * Create process 0 (the swapper). 476 */ 477 LIST_INSERT_HEAD(&allproc, p, p_list); 478 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 479 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 480 p->p_pgrp = &pgrp0; 481 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 482 LIST_INIT(&pgrp0.pg_members); 483 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 484 485 pgrp0.pg_session = &session0; 486 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 487 refcount_init(&session0.s_count, 1); 488 session0.s_leader = p; 489 490 p->p_sysent = &null_sysvec; 491 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 492 p->p_flag2 = 0; 493 p->p_state = PRS_NORMAL; 494 p->p_klist = knlist_alloc(&p->p_mtx); 495 STAILQ_INIT(&p->p_ktr); 496 p->p_nice = NZERO; 497 /* pid_max cannot be greater than PID_MAX */ 498 td->td_tid = PID_MAX + 1; 499 LIST_INSERT_HEAD(TIDHASH(td->td_tid), td, td_hash); 500 td->td_state = TDS_RUNNING; 501 td->td_pri_class = PRI_TIMESHARE; 502 td->td_user_pri = PUSER; 503 td->td_base_user_pri = PUSER; 504 td->td_lend_user_pri = PRI_MAX; 505 td->td_priority = PVM; 506 td->td_base_pri = PVM; 507 td->td_oncpu = curcpu; 508 td->td_flags = TDF_INMEM; 509 td->td_pflags = TDP_KTHREAD; 510 td->td_cpuset = cpuset_thread0(); 511 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 512 prison0_init(); 513 p->p_peers = 0; 514 p->p_leader = p; 515 p->p_reaper = p; 516 p->p_treeflag |= P_TREE_REAPER; 517 LIST_INIT(&p->p_reaplist); 518 519 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 520 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 521 522 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 523 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 524 callout_init(&td->td_slpcallout, 1); 525 526 /* Create credentials. */ 527 newcred = crget(); 528 newcred->cr_ngroups = 1; /* group 0 */ 529 /* A hack to prevent uifind from tripping over NULL pointers. */ 530 curthread->td_ucred = newcred; 531 tmpuinfo.ui_uid = 1; 532 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 533 newcred->cr_uidinfo = uifind(0); 534 newcred->cr_ruidinfo = uifind(0); 535 newcred->cr_loginclass = &tmplc; 536 newcred->cr_loginclass = loginclass_find("default"); 537 /* End hack. creds get properly set later with thread_cow_get_proc */ 538 curthread->td_ucred = NULL; 539 newcred->cr_prison = &prison0; 540 proc_set_cred_init(p, newcred); 541#ifdef AUDIT 542 audit_cred_kproc0(newcred); 543#endif 544#ifdef MAC 545 mac_cred_create_swapper(newcred); 546#endif 547 /* Create sigacts. */ 548 p->p_sigacts = sigacts_alloc(); 549 550 /* Initialize signal state for process 0. */ 551 siginit(&proc0); 552 553 /* Create the file descriptor table. */ 554 p->p_fd = fdinit(NULL, false); 555 p->p_fdtol = NULL; 556 557 /* Create the limits structures. */ 558 p->p_limit = lim_alloc(); 559 for (i = 0; i < RLIM_NLIMITS; i++) 560 p->p_limit->pl_rlimit[i].rlim_cur = 561 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 562 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 563 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 564 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 565 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 566 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 567 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 568 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 569 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 570 /* Cast to avoid overflow on i386/PAE. */ 571 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 572 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 573 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 574 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 575 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 576 p->p_cpulimit = RLIM_INFINITY; 577 578 PROC_LOCK(p); 579 thread_cow_get_proc(td, p); 580 PROC_UNLOCK(p); 581 582 /* Initialize resource accounting structures. */ 583 racct_create(&p->p_racct); 584 585 p->p_stats = pstats_alloc(); 586 587 /* Allocate a prototype map so we have something to fork. */ 588 p->p_vmspace = &vmspace0; 589 vmspace0.vm_refcnt = 1; 590 pmap_pinit0(vmspace_pmap(&vmspace0)); 591 592 /* 593 * proc0 is not expected to enter usermode, so there is no special 594 * handling for sv_minuser here, like is done for exec_new_vmspace(). 595 */ 596 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 597 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 598 599 /* 600 * Call the init and ctor for the new thread and proc. We wait 601 * to do this until all other structures are fairly sane. 602 */ 603 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 604 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 605 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 606 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 607 608 /* 609 * Charge root for one process. 610 */ 611 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 612 PROC_LOCK(p); 613 racct_add_force(p, RACCT_NPROC, 1); 614 PROC_UNLOCK(p); 615} 616SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 617 618/* ARGSUSED*/ 619static void 620proc0_post(void *dummy __unused) 621{ 622 struct timespec ts; 623 struct proc *p; 624 struct rusage ru; 625 struct thread *td; 626 627 /* 628 * Now we can look at the time, having had a chance to verify the 629 * time from the filesystem. Pretend that proc0 started now. 630 */ 631 sx_slock(&allproc_lock); 632 FOREACH_PROC_IN_SYSTEM(p) { 633 PROC_LOCK(p); 634 if (p->p_state == PRS_NEW) { 635 PROC_UNLOCK(p); 636 continue; 637 } 638 microuptime(&p->p_stats->p_start); 639 PROC_STATLOCK(p); 640 rufetch(p, &ru); /* Clears thread stats */ 641 p->p_rux.rux_runtime = 0; 642 p->p_rux.rux_uticks = 0; 643 p->p_rux.rux_sticks = 0; 644 p->p_rux.rux_iticks = 0; 645 PROC_STATUNLOCK(p); 646 FOREACH_THREAD_IN_PROC(p, td) { 647 td->td_runtime = 0; 648 } 649 PROC_UNLOCK(p); 650 } 651 sx_sunlock(&allproc_lock); 652 PCPU_SET(switchtime, cpu_ticks()); 653 PCPU_SET(switchticks, ticks); 654 655 /* 656 * Give the ``random'' number generator a thump. 657 */ 658 nanotime(&ts); 659 srandom(ts.tv_sec ^ ts.tv_nsec); 660} 661SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 662 663static void 664random_init(void *dummy __unused) 665{ 666 667 /* 668 * After CPU has been started we have some randomness on most 669 * platforms via get_cyclecount(). For platforms that don't 670 * we will reseed random(9) in proc0_post() as well. 671 */ 672 srandom(get_cyclecount()); 673} 674SYSINIT(random, SI_SUB_RANDOM, SI_ORDER_FIRST, random_init, NULL); 675 676/* 677 *************************************************************************** 678 **** 679 **** The following SYSINIT's and glue code should be moved to the 680 **** respective files on a per subsystem basis. 681 **** 682 *************************************************************************** 683 */ 684 685/* 686 * List of paths to try when searching for "init". 687 */ 688static char init_path[MAXPATHLEN] = 689#ifdef INIT_PATH 690 __XSTRING(INIT_PATH); 691#else 692 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 693#endif 694SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 695 "Path used to search the init process"); 696 697/* 698 * Shutdown timeout of init(8). 699 * Unused within kernel, but used to control init(8), hence do not remove. 700 */ 701#ifndef INIT_SHUTDOWN_TIMEOUT 702#define INIT_SHUTDOWN_TIMEOUT 120 703#endif 704static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 705SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 706 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 707 "Unused within kernel, but used to control init(8)"); 708 709/* 710 * Start the initial user process; try exec'ing each pathname in init_path. 711 * The program is invoked with one argument containing the boot flags. 712 */ 713static void 714start_init(void *dummy) 715{ 716 vm_offset_t addr; 717 struct execve_args args; 718 int options, error; 719 size_t pathlen; 720 char *var, *path; 721 char *free_init_path, *tmp_init_path; 722 char *ucp, **uap, *arg0, *arg1; 723 struct thread *td; 724 struct proc *p; 725 726 TSENTER(); /* Here so we don't overlap with mi_startup. */ 727 728 td = curthread; 729 p = td->td_proc; 730 731 vfs_mountroot(); 732 733 /* Wipe GELI passphrase from the environment. */ 734 kern_unsetenv("kern.geom.eli.passphrase"); 735 736 /* 737 * Need just enough stack to hold the faked-up "execve()" arguments. 738 */ 739 addr = p->p_sysent->sv_usrstack - PAGE_SIZE; 740 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE, 0, 741 VMFS_NO_SPACE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0) 742 panic("init: couldn't allocate argument space"); 743 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 744 p->p_vmspace->vm_ssize = 1; 745 746 /* For Multicons, report which console is primary to both */ 747 if (boothowto & RB_MULTIPLE) { 748 if (boothowto & RB_SERIAL) 749 printf("Dual Console: Serial Primary, Video Secondary\n"); 750 else 751 printf("Dual Console: Video Primary, Serial Secondary\n"); 752 } 753 754 if ((var = kern_getenv("init_path")) != NULL) { 755 strlcpy(init_path, var, sizeof(init_path)); 756 freeenv(var); 757 } 758 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 759 760 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 761 pathlen = strlen(path) + 1; 762 if (bootverbose) 763 printf("start_init: trying %s\n", path); 764 765 /* 766 * Move out the boot flag argument. 767 */ 768 options = 0; 769 ucp = (char *)p->p_sysent->sv_usrstack; 770 (void)subyte(--ucp, 0); /* trailing zero */ 771 if (boothowto & RB_SINGLE) { 772 (void)subyte(--ucp, 's'); 773 options = 1; 774 } 775#ifdef notyet 776 if (boothowto & RB_FASTBOOT) { 777 (void)subyte(--ucp, 'f'); 778 options = 1; 779 } 780#endif 781 782#ifdef BOOTCDROM 783 (void)subyte(--ucp, 'C'); 784 options = 1; 785#endif 786 787 if (options == 0) 788 (void)subyte(--ucp, '-'); 789 (void)subyte(--ucp, '-'); /* leading hyphen */ 790 arg1 = ucp; 791 792 /* 793 * Move out the file name (also arg 0). 794 */ 795 ucp -= pathlen; 796 copyout(path, ucp, pathlen); 797 arg0 = ucp; 798 799 /* 800 * Move out the arg pointers. 801 */ 802 uap = (char **)rounddown2((intptr_t)ucp, sizeof(intptr_t)); 803 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 804 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 805 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 806 807 /* 808 * Point at the arguments. 809 */ 810 args.fname = arg0; 811 args.argv = uap; 812 args.envv = NULL; 813 814 /* 815 * Now try to exec the program. If can't for any reason 816 * other than it doesn't exist, complain. 817 * 818 * Otherwise, return via fork_trampoline() all the way 819 * to user mode as init! 820 */ 821 if ((error = sys_execve(td, &args)) == EJUSTRETURN) { 822 free(free_init_path, M_TEMP); 823 TSEXIT(); 824 return; 825 } 826 if (error != ENOENT) 827 printf("exec %s: error %d\n", path, error); 828 } 829 free(free_init_path, M_TEMP); 830 printf("init: not found in path %s\n", init_path); 831 panic("no init"); 832} 833 834/* 835 * Like kproc_create(), but runs in its own address space. We do this 836 * early to reserve pid 1. Note special case - do not make it 837 * runnable yet, init execution is started when userspace can be served. 838 */ 839static void 840create_init(const void *udata __unused) 841{ 842 struct fork_req fr; 843 struct ucred *newcred, *oldcred; 844 struct thread *td; 845 int error; 846 847 bzero(&fr, sizeof(fr)); 848 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 849 fr.fr_procp = &initproc; 850 error = fork1(&thread0, &fr); 851 if (error) 852 panic("cannot fork init: %d\n", error); 853 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 854 /* divorce init's credentials from the kernel's */ 855 newcred = crget(); 856 sx_xlock(&proctree_lock); 857 PROC_LOCK(initproc); 858 initproc->p_flag |= P_SYSTEM | P_INMEM; 859 initproc->p_treeflag |= P_TREE_REAPER; 860 oldcred = initproc->p_ucred; 861 crcopy(newcred, oldcred); 862#ifdef MAC 863 mac_cred_create_init(newcred); 864#endif 865#ifdef AUDIT 866 audit_cred_proc1(newcred); 867#endif 868 proc_set_cred(initproc, newcred); 869 td = FIRST_THREAD_IN_PROC(initproc); 870 crfree(td->td_ucred); 871 td->td_ucred = crhold(initproc->p_ucred); 872 PROC_UNLOCK(initproc); 873 sx_xunlock(&proctree_lock); 874 crfree(oldcred); 875 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 876 start_init, NULL); 877} 878SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 879 880/* 881 * Make it runnable now. 882 */ 883static void 884kick_init(const void *udata __unused) 885{ 886 struct thread *td; 887 888 td = FIRST_THREAD_IN_PROC(initproc); 889 thread_lock(td); 890 TD_SET_CAN_RUN(td); 891 sched_add(td, SRQ_BORING); 892 thread_unlock(td); 893} 894SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 895