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_kdb.h" 51 #include "opt_init_path.h" 52 #include "opt_verbose_sysinit.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/boottrace.h> 57 #include <sys/conf.h> 58 #include <sys/cpuset.h> 59 #include <sys/dtrace_bsd.h> 60 #include <sys/epoch.h> 61 #include <sys/eventhandler.h> 62 #include <sys/exec.h> 63 #include <sys/file.h> 64 #include <sys/filedesc.h> 65 #include <sys/imgact.h> 66 #include <sys/jail.h> 67 #include <sys/kernel.h> 68 #include <sys/ktr.h> 69 #include <sys/lock.h> 70 #include <sys/loginclass.h> 71 #include <sys/malloc.h> 72 #include <sys/mount.h> 73 #include <sys/mutex.h> 74 #include <sys/proc.h> 75 #include <sys/racct.h> 76 #include <sys/reboot.h> 77 #include <sys/resourcevar.h> 78 #include <sys/sched.h> 79 #include <sys/signalvar.h> 80 #include <sys/sx.h> 81 #include <sys/syscallsubr.h> 82 #include <sys/sysctl.h> 83 #include <sys/sysent.h> 84 #include <sys/sysproto.h> 85 #include <sys/unistd.h> 86 #include <sys/vmmeter.h> 87 #include <sys/vnode.h> 88 89 #include <machine/cpu.h> 90 91 #include <security/audit/audit.h> 92 #include <security/mac/mac_framework.h> 93 94 #include <vm/vm.h> 95 #include <vm/vm_param.h> 96 #include <vm/vm_extern.h> 97 #include <vm/pmap.h> 98 #include <vm/vm_map.h> 99 #include <sys/copyright.h> 100 101 #include <ddb/ddb.h> 102 #include <ddb/db_sym.h> 103 104 void mi_startup(void); /* Should be elsewhere */ 105 106 /* Components of the first process -- never freed. */ 107 static struct session session0; 108 static struct pgrp pgrp0; 109 struct proc proc0; 110 struct thread0_storage thread0_st __aligned(32); 111 struct vmspace vmspace0; 112 struct proc *initproc; 113 114 int 115 linux_alloc_current_noop(struct thread *td __unused, int flags __unused) 116 { 117 return (0); 118 } 119 int (*lkpi_alloc_current)(struct thread *, int) = linux_alloc_current_noop; 120 121 #ifndef BOOTHOWTO 122 #define BOOTHOWTO 0 123 #endif 124 int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 125 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 126 "Boot control flags, passed from loader"); 127 128 #ifndef BOOTVERBOSE 129 #define BOOTVERBOSE 0 130 #endif 131 int bootverbose = BOOTVERBOSE; 132 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 133 "Control the output of verbose kernel messages"); 134 135 #ifdef VERBOSE_SYSINIT 136 /* 137 * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to 138 * dictate the default VERBOSE_SYSINIT behavior. Significant values for this 139 * option and associated tunable are: 140 * - 0, 'compiled in but silent by default' 141 * - 1, 'compiled in but verbose by default' (default) 142 */ 143 int verbose_sysinit = VERBOSE_SYSINIT; 144 TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit); 145 #endif 146 147 #ifdef INVARIANTS 148 FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 149 #endif 150 151 /* 152 * This ensures that there is at least one entry so that the sysinit_set 153 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 154 * executed. 155 */ 156 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 157 158 /* 159 * The sysinit table itself. Items are checked off as the are run. 160 * If we want to register new sysinit types, add them to newsysinit. 161 */ 162 SET_DECLARE(sysinit_set, struct sysinit); 163 struct sysinit **sysinit, **sysinit_end; 164 struct sysinit **newsysinit, **newsysinit_end; 165 166 /* 167 * Merge a new sysinit set into the current set, reallocating it if 168 * necessary. This can only be called after malloc is running. 169 */ 170 void 171 sysinit_add(struct sysinit **set, struct sysinit **set_end) 172 { 173 struct sysinit **newset; 174 struct sysinit **sipp; 175 struct sysinit **xipp; 176 int count; 177 178 count = set_end - set; 179 if (newsysinit) 180 count += newsysinit_end - newsysinit; 181 else 182 count += sysinit_end - sysinit; 183 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 184 if (newset == NULL) 185 panic("cannot malloc for sysinit"); 186 xipp = newset; 187 if (newsysinit) 188 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 189 *xipp++ = *sipp; 190 else 191 for (sipp = sysinit; sipp < sysinit_end; sipp++) 192 *xipp++ = *sipp; 193 for (sipp = set; sipp < set_end; sipp++) 194 *xipp++ = *sipp; 195 if (newsysinit) 196 free(newsysinit, M_TEMP); 197 newsysinit = newset; 198 newsysinit_end = newset + count; 199 } 200 201 #if defined (DDB) && defined(VERBOSE_SYSINIT) 202 static const char * 203 symbol_name(vm_offset_t va, db_strategy_t strategy) 204 { 205 const char *name; 206 c_db_sym_t sym; 207 db_expr_t offset; 208 209 if (va == 0) 210 return (NULL); 211 sym = db_search_symbol(va, strategy, &offset); 212 if (offset != 0) 213 return (NULL); 214 db_symbol_values(sym, &name, NULL); 215 return (name); 216 } 217 #endif 218 219 /* 220 * System startup; initialize the world, create process 0, mount root 221 * filesystem, and fork to create init and pagedaemon. Most of the 222 * hard work is done in the lower-level initialization routines including 223 * startup(), which does memory initialization and autoconfiguration. 224 * 225 * This allows simple addition of new kernel subsystems that require 226 * boot time initialization. It also allows substitution of subsystem 227 * (for instance, a scheduler, kernel profiler, or VM system) by object 228 * module. Finally, it allows for optional "kernel threads". 229 */ 230 void 231 mi_startup(void) 232 { 233 234 struct sysinit **sipp; /* system initialization*/ 235 struct sysinit **xipp; /* interior loop of sort*/ 236 struct sysinit *save; /* bubble*/ 237 238 int last; 239 #if defined(VERBOSE_SYSINIT) 240 int verbose; 241 #endif 242 243 TSENTER(); 244 245 if (boothowto & RB_VERBOSE) 246 bootverbose++; 247 248 if (sysinit == NULL) { 249 sysinit = SET_BEGIN(sysinit_set); 250 sysinit_end = SET_LIMIT(sysinit_set); 251 } 252 253 restart: 254 /* 255 * Perform a bubble sort of the system initialization objects by 256 * their subsystem (primary key) and order (secondary key). 257 */ 258 TSENTER2("bubblesort"); 259 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 260 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 261 if ((*sipp)->subsystem < (*xipp)->subsystem || 262 ((*sipp)->subsystem == (*xipp)->subsystem && 263 (*sipp)->order <= (*xipp)->order)) 264 continue; /* skip*/ 265 save = *sipp; 266 *sipp = *xipp; 267 *xipp = save; 268 } 269 } 270 TSEXIT2("bubblesort"); 271 272 last = SI_SUB_COPYRIGHT; 273 #if defined(VERBOSE_SYSINIT) 274 verbose = 0; 275 #if !defined(DDB) 276 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 277 #endif 278 #endif 279 280 /* 281 * Traverse the (now) ordered list of system initialization tasks. 282 * Perform each task, and continue on to the next task. 283 */ 284 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 285 if ((*sipp)->subsystem == SI_SUB_DUMMY) 286 continue; /* skip dummy task(s)*/ 287 288 if ((*sipp)->subsystem == SI_SUB_DONE) 289 continue; 290 291 if ((*sipp)->subsystem > last) 292 BOOTTRACE_INIT("sysinit 0x%7x", (*sipp)->subsystem); 293 294 #if defined(VERBOSE_SYSINIT) 295 if ((*sipp)->subsystem > last && verbose_sysinit != 0) { 296 verbose = 1; 297 printf("subsystem %x\n", last); 298 } 299 if (verbose) { 300 #if defined(DDB) 301 const char *func, *data; 302 303 func = symbol_name((vm_offset_t)(*sipp)->func, 304 DB_STGY_PROC); 305 data = symbol_name((vm_offset_t)(*sipp)->udata, 306 DB_STGY_ANY); 307 if (func != NULL && data != NULL) 308 printf(" %s(&%s)... ", func, data); 309 else if (func != NULL) 310 printf(" %s(%p)... ", func, (*sipp)->udata); 311 else 312 #endif 313 printf(" %p(%p)... ", (*sipp)->func, 314 (*sipp)->udata); 315 } 316 #endif 317 318 /* Call function */ 319 (*((*sipp)->func))((*sipp)->udata); 320 321 #if defined(VERBOSE_SYSINIT) 322 if (verbose) 323 printf("done.\n"); 324 #endif 325 326 /* Check off the one we're just done */ 327 last = (*sipp)->subsystem; 328 (*sipp)->subsystem = SI_SUB_DONE; 329 330 /* Check if we've installed more sysinit items via KLD */ 331 if (newsysinit != NULL) { 332 if (sysinit != SET_BEGIN(sysinit_set)) 333 free(sysinit, M_TEMP); 334 sysinit = newsysinit; 335 sysinit_end = newsysinit_end; 336 newsysinit = NULL; 337 newsysinit_end = NULL; 338 goto restart; 339 } 340 } 341 342 TSEXIT(); /* Here so we don't overlap with start_init. */ 343 BOOTTRACE("mi_startup done"); 344 345 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 346 mtx_unlock(&Giant); 347 348 /* 349 * Now hand over this thread to swapper. 350 */ 351 swapper(); 352 /* NOTREACHED*/ 353 } 354 355 static void 356 print_caddr_t(void *data) 357 { 358 printf("%s", (char *)data); 359 } 360 361 static void 362 print_version(void *data __unused) 363 { 364 int len; 365 366 /* Strip a trailing newline from version. */ 367 len = strlen(version); 368 while (len > 0 && version[len - 1] == '\n') 369 len--; 370 printf("%.*s %s\n", len, version, machine); 371 printf("%s\n", compiler_version); 372 } 373 374 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 375 copyright); 376 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 377 trademark); 378 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 379 380 #ifdef WITNESS 381 static char wit_warn[] = 382 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 383 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH, 384 print_caddr_t, wit_warn); 385 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH, 386 print_caddr_t, wit_warn); 387 #endif 388 389 #ifdef DIAGNOSTIC 390 static char diag_warn[] = 391 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 392 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 393 print_caddr_t, diag_warn); 394 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH, 395 print_caddr_t, diag_warn); 396 #endif 397 398 #if __SIZEOF_LONG__ == 4 399 static char ilp32_warn[] = 400 "WARNING: 32-bit kernels are deprecated and may be removed in FreeBSD 15.0.\n"; 401 SYSINIT(ilp32warn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 402 print_caddr_t, ilp32_warn); 403 SYSINIT(ilp32warn2, SI_SUB_LAST, SI_ORDER_FIFTH, 404 print_caddr_t, ilp32_warn); 405 #endif 406 407 static int 408 null_fetch_syscall_args(struct thread *td __unused) 409 { 410 411 panic("null_fetch_syscall_args"); 412 } 413 414 static void 415 null_set_syscall_retval(struct thread *td __unused, int error __unused) 416 { 417 418 panic("null_set_syscall_retval"); 419 } 420 421 static void 422 null_set_fork_retval(struct thread *td __unused) 423 { 424 425 } 426 427 struct sysentvec null_sysvec = { 428 .sv_size = 0, 429 .sv_table = NULL, 430 .sv_fixup = NULL, 431 .sv_sendsig = NULL, 432 .sv_sigcode = NULL, 433 .sv_szsigcode = NULL, 434 .sv_name = "null", 435 .sv_coredump = NULL, 436 .sv_minsigstksz = 0, 437 .sv_minuser = VM_MIN_ADDRESS, 438 .sv_maxuser = VM_MAXUSER_ADDRESS, 439 .sv_usrstack = USRSTACK, 440 .sv_psstrings = PS_STRINGS, 441 .sv_psstringssz = sizeof(struct ps_strings), 442 .sv_stackprot = VM_PROT_ALL, 443 .sv_copyout_strings = NULL, 444 .sv_setregs = NULL, 445 .sv_fixlimit = NULL, 446 .sv_maxssiz = NULL, 447 .sv_flags = 0, 448 .sv_set_syscall_retval = null_set_syscall_retval, 449 .sv_fetch_syscall_args = null_fetch_syscall_args, 450 .sv_syscallnames = NULL, 451 .sv_schedtail = NULL, 452 .sv_thread_detach = NULL, 453 .sv_trap = NULL, 454 .sv_set_fork_retval = null_set_fork_retval, 455 .sv_regset_begin = NULL, 456 .sv_regset_end = NULL, 457 }; 458 459 /* 460 * The two following SYSINIT's are proc0 specific glue code. I am not 461 * convinced that they can not be safely combined, but their order of 462 * operation has been maintained as the same as the original init_main.c 463 * for right now. 464 */ 465 /* ARGSUSED*/ 466 static void 467 proc0_init(void *dummy __unused) 468 { 469 struct proc *p; 470 struct thread *td; 471 struct ucred *newcred; 472 struct uidinfo tmpuinfo; 473 struct loginclass tmplc = { 474 .lc_name = "", 475 }; 476 vm_paddr_t pageablemem; 477 int i; 478 479 GIANT_REQUIRED; 480 p = &proc0; 481 td = &thread0; 482 483 /* 484 * Initialize magic number and osrel. 485 */ 486 p->p_magic = P_MAGIC; 487 p->p_osrel = osreldate; 488 489 /* 490 * Initialize thread and process structures. 491 */ 492 procinit(); /* set up proc zone */ 493 threadinit(); /* set up UMA zones */ 494 495 /* 496 * Initialise scheduler resources. 497 * Add scheduler specific parts to proc, thread as needed. 498 */ 499 schedinit(); /* scheduler gets its house in order */ 500 501 /* 502 * Create process 0 (the swapper). 503 */ 504 LIST_INSERT_HEAD(&allproc, p, p_list); 505 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 506 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 507 sx_init(&pgrp0.pg_killsx, "killpg racer"); 508 p->p_pgrp = &pgrp0; 509 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 510 LIST_INIT(&pgrp0.pg_members); 511 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 512 513 pgrp0.pg_session = &session0; 514 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 515 refcount_init(&session0.s_count, 1); 516 session0.s_leader = p; 517 518 p->p_sysent = &null_sysvec; 519 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 520 p->p_flag2 = 0; 521 p->p_state = PRS_NORMAL; 522 p->p_klist = knlist_alloc(&p->p_mtx); 523 STAILQ_INIT(&p->p_ktr); 524 p->p_nice = NZERO; 525 td->td_tid = THREAD0_TID; 526 tidhash_add(td); 527 TD_SET_STATE(td, TDS_RUNNING); 528 td->td_pri_class = PRI_TIMESHARE; 529 td->td_user_pri = PUSER; 530 td->td_base_user_pri = PUSER; 531 td->td_lend_user_pri = PRI_MAX; 532 td->td_priority = PVM; 533 td->td_base_pri = PVM; 534 td->td_oncpu = curcpu; 535 td->td_flags = TDF_INMEM; 536 td->td_pflags = TDP_KTHREAD; 537 td->td_cpuset = cpuset_thread0(); 538 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 539 prison0_init(); 540 p->p_peers = 0; 541 p->p_leader = p; 542 p->p_reaper = p; 543 p->p_treeflag |= P_TREE_REAPER; 544 LIST_INIT(&p->p_reaplist); 545 546 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 547 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 548 549 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 550 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 551 callout_init(&td->td_slpcallout, 1); 552 TAILQ_INIT(&p->p_kqtim_stop); 553 554 /* Create credentials. */ 555 newcred = crget(); 556 newcred->cr_ngroups = 1; /* group 0 */ 557 /* A hack to prevent uifind from tripping over NULL pointers. */ 558 curthread->td_ucred = newcred; 559 tmpuinfo.ui_uid = 1; 560 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 561 newcred->cr_uidinfo = uifind(0); 562 newcred->cr_ruidinfo = uifind(0); 563 newcred->cr_loginclass = &tmplc; 564 newcred->cr_loginclass = loginclass_find("default"); 565 /* End hack. creds get properly set later with thread_cow_get_proc */ 566 curthread->td_ucred = NULL; 567 newcred->cr_prison = &prison0; 568 newcred->cr_users++; /* avoid assertion failure */ 569 proc_set_cred_init(p, newcred); 570 newcred->cr_users--; 571 crfree(newcred); 572 #ifdef AUDIT 573 audit_cred_kproc0(newcred); 574 #endif 575 #ifdef MAC 576 mac_cred_create_swapper(newcred); 577 #endif 578 /* Create sigacts. */ 579 p->p_sigacts = sigacts_alloc(); 580 581 /* Initialize signal state for process 0. */ 582 siginit(&proc0); 583 584 /* Create the file descriptor table. */ 585 p->p_pd = pdinit(NULL, false); 586 p->p_fd = fdinit(); 587 p->p_fdtol = NULL; 588 589 /* Create the limits structures. */ 590 p->p_limit = lim_alloc(); 591 for (i = 0; i < RLIM_NLIMITS; i++) 592 p->p_limit->pl_rlimit[i].rlim_cur = 593 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 594 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 595 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 596 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 597 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 598 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 599 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 600 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 601 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 602 /* Cast to avoid overflow on i386/PAE. */ 603 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 604 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 605 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 606 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 607 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 608 p->p_cpulimit = RLIM_INFINITY; 609 610 PROC_LOCK(p); 611 thread_cow_get_proc(td, p); 612 PROC_UNLOCK(p); 613 614 /* Initialize resource accounting structures. */ 615 racct_create(&p->p_racct); 616 617 p->p_stats = pstats_alloc(); 618 619 /* Allocate a prototype map so we have something to fork. */ 620 p->p_vmspace = &vmspace0; 621 refcount_init(&vmspace0.vm_refcnt, 1); 622 pmap_pinit0(vmspace_pmap(&vmspace0)); 623 624 /* 625 * proc0 is not expected to enter usermode, so there is no special 626 * handling for sv_minuser here, like is done for exec_new_vmspace(). 627 */ 628 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 629 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 630 631 /* 632 * Call the init and ctor for the new thread and proc. We wait 633 * to do this until all other structures are fairly sane. 634 */ 635 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 636 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 637 #ifdef KDTRACE_HOOKS 638 kdtrace_proc_ctor(p); 639 kdtrace_thread_ctor(td); 640 #endif 641 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 642 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 643 644 /* 645 * Charge root for one process. 646 */ 647 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 648 PROC_LOCK(p); 649 racct_add_force(p, RACCT_NPROC, 1); 650 PROC_UNLOCK(p); 651 } 652 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 653 654 /* ARGSUSED*/ 655 static void 656 proc0_post(void *dummy __unused) 657 { 658 struct proc *p; 659 struct rusage ru; 660 struct thread *td; 661 662 /* 663 * Now we can look at the time, having had a chance to verify the 664 * time from the filesystem. Pretend that proc0 started now. 665 */ 666 sx_slock(&allproc_lock); 667 FOREACH_PROC_IN_SYSTEM(p) { 668 PROC_LOCK(p); 669 if (p->p_state == PRS_NEW) { 670 PROC_UNLOCK(p); 671 continue; 672 } 673 microuptime(&p->p_stats->p_start); 674 PROC_STATLOCK(p); 675 rufetch(p, &ru); /* Clears thread stats */ 676 p->p_rux.rux_runtime = 0; 677 p->p_rux.rux_uticks = 0; 678 p->p_rux.rux_sticks = 0; 679 p->p_rux.rux_iticks = 0; 680 PROC_STATUNLOCK(p); 681 FOREACH_THREAD_IN_PROC(p, td) { 682 td->td_runtime = 0; 683 } 684 PROC_UNLOCK(p); 685 } 686 sx_sunlock(&allproc_lock); 687 PCPU_SET(switchtime, cpu_ticks()); 688 PCPU_SET(switchticks, ticks); 689 } 690 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 691 692 /* 693 *************************************************************************** 694 **** 695 **** The following SYSINIT's and glue code should be moved to the 696 **** respective files on a per subsystem basis. 697 **** 698 *************************************************************************** 699 */ 700 701 /* 702 * List of paths to try when searching for "init". 703 */ 704 static char init_path[MAXPATHLEN] = 705 #ifdef INIT_PATH 706 __XSTRING(INIT_PATH); 707 #else 708 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 709 #endif 710 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 711 "Path used to search the init process"); 712 713 /* 714 * Shutdown timeout of init(8). 715 * Unused within kernel, but used to control init(8), hence do not remove. 716 */ 717 #ifndef INIT_SHUTDOWN_TIMEOUT 718 #define INIT_SHUTDOWN_TIMEOUT 120 719 #endif 720 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 721 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 722 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 723 "Unused within kernel, but used to control init(8)"); 724 725 /* 726 * Start the initial user process; try exec'ing each pathname in init_path. 727 * The program is invoked with one argument containing the boot flags. 728 */ 729 static void 730 start_init(void *dummy) 731 { 732 struct image_args args; 733 int error; 734 char *var, *path; 735 char *free_init_path, *tmp_init_path; 736 struct thread *td; 737 struct proc *p; 738 struct vmspace *oldvmspace; 739 740 TSENTER(); /* Here so we don't overlap with mi_startup. */ 741 742 td = curthread; 743 p = td->td_proc; 744 745 vfs_mountroot(); 746 747 /* Wipe GELI passphrase from the environment. */ 748 kern_unsetenv("kern.geom.eli.passphrase"); 749 750 /* For Multicons, report which console is primary to both */ 751 if (boothowto & RB_MULTIPLE) { 752 if (boothowto & RB_SERIAL) 753 printf("Dual Console: Serial Primary, Video Secondary\n"); 754 else 755 printf("Dual Console: Video Primary, Serial Secondary\n"); 756 } 757 758 if ((var = kern_getenv("init_path")) != NULL) { 759 strlcpy(init_path, var, sizeof(init_path)); 760 freeenv(var); 761 } 762 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 763 764 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 765 if (bootverbose) 766 printf("start_init: trying %s\n", path); 767 768 memset(&args, 0, sizeof(args)); 769 error = exec_alloc_args(&args); 770 if (error != 0) 771 panic("%s: Can't allocate space for init arguments %d", 772 __func__, error); 773 774 error = exec_args_add_fname(&args, path, UIO_SYSSPACE); 775 if (error != 0) 776 panic("%s: Can't add fname %d", __func__, error); 777 error = exec_args_add_arg(&args, path, UIO_SYSSPACE); 778 if (error != 0) 779 panic("%s: Can't add argv[0] %d", __func__, error); 780 if (boothowto & RB_SINGLE) 781 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE); 782 if (error != 0) 783 panic("%s: Can't add argv[0] %d", __func__, error); 784 785 /* 786 * Now try to exec the program. If can't for any reason 787 * other than it doesn't exist, complain. 788 * 789 * Otherwise, return via fork_trampoline() all the way 790 * to user mode as init! 791 */ 792 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0, 793 ("nested execve")); 794 oldvmspace = p->p_vmspace; 795 error = kern_execve(td, &args, NULL, oldvmspace); 796 KASSERT(error != 0, 797 ("kern_execve returned success, not EJUSTRETURN")); 798 if (error == EJUSTRETURN) { 799 exec_cleanup(td, oldvmspace); 800 free(free_init_path, M_TEMP); 801 TSEXIT(); 802 return; 803 } 804 if (error != ENOENT) 805 printf("exec %s: error %d\n", path, error); 806 } 807 free(free_init_path, M_TEMP); 808 printf("init: not found in path %s\n", init_path); 809 panic("no init"); 810 } 811 812 /* 813 * Like kproc_create(), but runs in its own address space. We do this 814 * early to reserve pid 1. Note special case - do not make it 815 * runnable yet, init execution is started when userspace can be served. 816 */ 817 static void 818 create_init(const void *udata __unused) 819 { 820 struct fork_req fr; 821 struct ucred *newcred, *oldcred; 822 struct thread *td; 823 int error; 824 825 bzero(&fr, sizeof(fr)); 826 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 827 fr.fr_procp = &initproc; 828 error = fork1(&thread0, &fr); 829 if (error) 830 panic("cannot fork init: %d\n", error); 831 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 832 /* divorce init's credentials from the kernel's */ 833 newcred = crget(); 834 sx_xlock(&proctree_lock); 835 PROC_LOCK(initproc); 836 initproc->p_flag |= P_SYSTEM | P_INMEM; 837 initproc->p_treeflag |= P_TREE_REAPER; 838 oldcred = initproc->p_ucred; 839 crcopy(newcred, oldcred); 840 #ifdef MAC 841 mac_cred_create_init(newcred); 842 #endif 843 #ifdef AUDIT 844 audit_cred_proc1(newcred); 845 #endif 846 proc_set_cred(initproc, newcred); 847 td = FIRST_THREAD_IN_PROC(initproc); 848 crcowfree(td); 849 td->td_realucred = crcowget(initproc->p_ucred); 850 td->td_ucred = td->td_realucred; 851 PROC_UNLOCK(initproc); 852 sx_xunlock(&proctree_lock); 853 crfree(oldcred); 854 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 855 start_init, NULL); 856 } 857 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 858 859 /* 860 * Make it runnable now. 861 */ 862 static void 863 kick_init(const void *udata __unused) 864 { 865 struct thread *td; 866 867 td = FIRST_THREAD_IN_PROC(initproc); 868 thread_lock(td); 869 TD_SET_CAN_RUN(td); 870 sched_add(td, SRQ_BORING); 871 } 872 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 873 874 /* 875 * DDB(4). 876 */ 877 #ifdef DDB 878 static void 879 db_show_print_syinit(struct sysinit *sip, bool ddb) 880 { 881 const char *sname, *funcname; 882 c_db_sym_t sym; 883 db_expr_t offset; 884 885 #define xprint(...) \ 886 if (ddb) \ 887 db_printf(__VA_ARGS__); \ 888 else \ 889 printf(__VA_ARGS__) 890 891 if (sip == NULL) { 892 xprint("%s: no sysinit * given\n", __func__); 893 return; 894 } 895 896 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); 897 db_symbol_values(sym, &sname, NULL); 898 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); 899 db_symbol_values(sym, &funcname, NULL); 900 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); 901 xprint(" %#08x %#08x\n", sip->subsystem, sip->order); 902 xprint(" %p(%s)(%p)\n", 903 sip->func, (funcname != NULL) ? funcname : "", sip->udata); 904 #undef xprint 905 } 906 907 DB_SHOW_COMMAND_FLAGS(sysinit, db_show_sysinit, DB_CMD_MEMSAFE) 908 { 909 struct sysinit **sipp; 910 911 db_printf("SYSINIT vs Name(Ptr)\n"); 912 db_printf(" Subsystem Order\n"); 913 db_printf(" Function(Name)(Arg)\n"); 914 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 915 db_show_print_syinit(*sipp, true); 916 if (db_pager_quit) 917 break; 918 } 919 } 920 #endif /* DDB */ 921