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 #include "opt_ddb.h" 48 #include "opt_kdb.h" 49 #include "opt_init_path.h" 50 #include "opt_verbose_sysinit.h" 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/boottrace.h> 55 #include <sys/conf.h> 56 #include <sys/cpuset.h> 57 #include <sys/dtrace_bsd.h> 58 #include <sys/epoch.h> 59 #include <sys/eventhandler.h> 60 #include <sys/exec.h> 61 #include <sys/file.h> 62 #include <sys/filedesc.h> 63 #include <sys/imgact.h> 64 #include <sys/jail.h> 65 #include <sys/kernel.h> 66 #include <sys/ktr.h> 67 #include <sys/lock.h> 68 #include <sys/loginclass.h> 69 #include <sys/malloc.h> 70 #include <sys/mount.h> 71 #include <sys/mutex.h> 72 #include <sys/proc.h> 73 #include <sys/racct.h> 74 #include <sys/reboot.h> 75 #include <sys/resourcevar.h> 76 #include <sys/queue.h> 77 #include <sys/queue_mergesort.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 linker set compiled into the kernel. These are placed onto the 160 * sysinit list by mi_startup; sysinit_add can add (e.g., from klds) additional 161 * sysinits to the linked list but the linker set here does not change. 162 */ 163 SET_DECLARE(sysinit_set, struct sysinit); 164 165 /* 166 * The sysinit lists. Items are moved to sysinit_done_list when done. 167 */ 168 static STAILQ_HEAD(sysinitlist, sysinit) sysinit_list; 169 static struct sysinitlist sysinit_done_list = 170 STAILQ_HEAD_INITIALIZER(sysinit_done_list); 171 172 /* 173 * Compare two sysinits; return -1, 0, or 1 if a comes before, at the same time 174 * as, or after b. 175 */ 176 static int 177 sysinit_compar(struct sysinit *a, struct sysinit *b, void *thunk __unused) 178 { 179 180 if (a->subsystem < b->subsystem) 181 return (-1); 182 if (a->subsystem > b->subsystem) 183 return (1); 184 if (a->order < b->order) 185 return (-1); 186 if (a->order > b->order) 187 return (1); 188 return (0); 189 } 190 191 static void 192 sysinit_mklist(struct sysinitlist *list, struct sysinit **set, 193 struct sysinit **set_end) 194 { 195 struct sysinit **sipp; 196 197 TSENTER(); 198 TSENTER2("listify"); 199 STAILQ_INIT(list); 200 for (sipp = set; sipp < set_end; sipp++) 201 STAILQ_INSERT_TAIL(list, *sipp, next); 202 TSEXIT2("listify"); 203 TSENTER2("mergesort"); 204 STAILQ_MERGESORT(list, NULL, sysinit_compar, sysinit, next); 205 TSEXIT2("mergesort"); 206 TSEXIT(); 207 } 208 209 /* 210 * Merge a new sysinit set into the sysinit list. 211 */ 212 void 213 sysinit_add(struct sysinit **set, struct sysinit **set_end) 214 { 215 struct sysinitlist new_list; 216 217 TSENTER(); 218 219 /* Construct a sorted list from the new sysinits. */ 220 sysinit_mklist(&new_list, set, set_end); 221 222 /* Merge the new list into the existing one. */ 223 TSENTER2("STAILQ_MERGE"); 224 STAILQ_MERGE(&sysinit_list, &new_list, NULL, sysinit_compar, sysinit, next); 225 TSEXIT2("STAILQ_MERGE"); 226 227 TSEXIT(); 228 } 229 230 #if defined (DDB) && defined(VERBOSE_SYSINIT) 231 static const char * 232 symbol_name(vm_offset_t va, db_strategy_t strategy) 233 { 234 const char *name; 235 c_db_sym_t sym; 236 db_expr_t offset; 237 238 if (va == 0) 239 return (NULL); 240 sym = db_search_symbol(va, strategy, &offset); 241 if (offset != 0) 242 return (NULL); 243 db_symbol_values(sym, &name, NULL); 244 return (name); 245 } 246 #endif 247 248 /* 249 * System startup; initialize the world, create process 0, mount root 250 * filesystem, and fork to create init and pagedaemon. Most of the 251 * hard work is done in the lower-level initialization routines including 252 * startup(), which does memory initialization and autoconfiguration. 253 * 254 * This allows simple addition of new kernel subsystems that require 255 * boot time initialization. It also allows substitution of subsystem 256 * (for instance, a scheduler, kernel profiler, or VM system) by object 257 * module. Finally, it allows for optional "kernel threads". 258 */ 259 void 260 mi_startup(void) 261 { 262 263 struct sysinit *sip; 264 int last; 265 #if defined(VERBOSE_SYSINIT) 266 int verbose; 267 #endif 268 269 TSENTER(); 270 271 if (boothowto & RB_VERBOSE) 272 bootverbose++; 273 274 /* Construct and sort sysinit list. */ 275 sysinit_mklist(&sysinit_list, SET_BEGIN(sysinit_set), SET_LIMIT(sysinit_set)); 276 277 last = SI_SUB_COPYRIGHT; 278 #if defined(VERBOSE_SYSINIT) 279 verbose = 0; 280 #if !defined(DDB) 281 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 282 #endif 283 #endif 284 285 /* 286 * Perform each system initialization task from the ordered list. Note 287 * that if sysinit_list is modified (e.g. by a KLD) we will nonetheless 288 * always perform the earlist-sorted sysinit at each step; using the 289 * STAILQ_FOREACH macro would result in items being skipped if inserted 290 * earlier than the "current item". 291 */ 292 while ((sip = STAILQ_FIRST(&sysinit_list)) != NULL) { 293 STAILQ_REMOVE_HEAD(&sysinit_list, next); 294 STAILQ_INSERT_TAIL(&sysinit_done_list, sip, next); 295 296 if (sip->subsystem == SI_SUB_DUMMY) 297 continue; /* skip dummy task(s)*/ 298 299 if (sip->subsystem > last) 300 BOOTTRACE_INIT("sysinit 0x%7x", sip->subsystem); 301 302 #if defined(VERBOSE_SYSINIT) 303 if (sip->subsystem > last && verbose_sysinit != 0) { 304 verbose = 1; 305 printf("subsystem %x\n", last); 306 } 307 if (verbose) { 308 #if defined(DDB) 309 const char *func, *data; 310 311 func = symbol_name((vm_offset_t)sip->func, 312 DB_STGY_PROC); 313 data = symbol_name((vm_offset_t)sip->udata, 314 DB_STGY_ANY); 315 if (func != NULL && data != NULL) 316 printf(" %s(&%s)... ", func, data); 317 else if (func != NULL) 318 printf(" %s(%p)... ", func, sip->udata); 319 else 320 #endif 321 printf(" %p(%p)... ", sip->func, 322 sip->udata); 323 } 324 #endif 325 326 /* Call function */ 327 (*(sip->func))(sip->udata); 328 329 #if defined(VERBOSE_SYSINIT) 330 if (verbose) 331 printf("done.\n"); 332 #endif 333 334 /* Check off the one we're just done */ 335 last = sip->subsystem; 336 } 337 338 TSEXIT(); /* Here so we don't overlap with start_init. */ 339 BOOTTRACE("mi_startup done"); 340 341 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 342 mtx_unlock(&Giant); 343 344 /* 345 * Now hand over this thread to swapper. 346 */ 347 swapper(); 348 /* NOTREACHED*/ 349 } 350 351 static void 352 print_caddr_t(void *data) 353 { 354 printf("%s", (char *)data); 355 } 356 357 static void 358 print_version(void *data __unused) 359 { 360 int len; 361 362 /* Strip a trailing newline from version. */ 363 len = strlen(version); 364 while (len > 0 && version[len - 1] == '\n') 365 len--; 366 printf("%.*s %s\n", len, version, machine); 367 printf("%s\n", compiler_version); 368 } 369 370 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 371 copyright); 372 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 373 trademark); 374 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 375 376 #ifdef WITNESS 377 static char wit_warn[] = 378 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 379 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH, 380 print_caddr_t, wit_warn); 381 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH, 382 print_caddr_t, wit_warn); 383 #endif 384 385 #ifdef DIAGNOSTIC 386 static char diag_warn[] = 387 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 388 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 389 print_caddr_t, diag_warn); 390 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH, 391 print_caddr_t, diag_warn); 392 #endif 393 394 #if __SIZEOF_LONG__ == 4 395 static char ilp32_warn[] = 396 "WARNING: 32-bit kernels are deprecated and may be removed in FreeBSD 15.0.\n"; 397 SYSINIT(ilp32warn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 398 print_caddr_t, ilp32_warn); 399 SYSINIT(ilp32warn2, SI_SUB_LAST, SI_ORDER_FIFTH, 400 print_caddr_t, ilp32_warn); 401 #endif 402 403 static int 404 null_fetch_syscall_args(struct thread *td __unused) 405 { 406 407 panic("null_fetch_syscall_args"); 408 } 409 410 static void 411 null_set_syscall_retval(struct thread *td __unused, int error __unused) 412 { 413 414 panic("null_set_syscall_retval"); 415 } 416 417 static void 418 null_set_fork_retval(struct thread *td __unused) 419 { 420 421 } 422 423 struct sysentvec null_sysvec = { 424 .sv_size = 0, 425 .sv_table = NULL, 426 .sv_fixup = NULL, 427 .sv_sendsig = NULL, 428 .sv_sigcode = NULL, 429 .sv_szsigcode = NULL, 430 .sv_name = "null", 431 .sv_coredump = NULL, 432 .sv_minsigstksz = 0, 433 .sv_minuser = VM_MIN_ADDRESS, 434 .sv_maxuser = VM_MAXUSER_ADDRESS, 435 .sv_usrstack = USRSTACK, 436 .sv_psstrings = PS_STRINGS, 437 .sv_psstringssz = sizeof(struct ps_strings), 438 .sv_stackprot = VM_PROT_ALL, 439 .sv_copyout_strings = NULL, 440 .sv_setregs = NULL, 441 .sv_fixlimit = NULL, 442 .sv_maxssiz = NULL, 443 .sv_flags = 0, 444 .sv_set_syscall_retval = null_set_syscall_retval, 445 .sv_fetch_syscall_args = null_fetch_syscall_args, 446 .sv_syscallnames = NULL, 447 .sv_schedtail = NULL, 448 .sv_thread_detach = NULL, 449 .sv_trap = NULL, 450 .sv_set_fork_retval = null_set_fork_retval, 451 .sv_regset_begin = NULL, 452 .sv_regset_end = NULL, 453 }; 454 455 /* 456 * The two following SYSINIT's are proc0 specific glue code. I am not 457 * convinced that they can not be safely combined, but their order of 458 * operation has been maintained as the same as the original init_main.c 459 * for right now. 460 */ 461 /* ARGSUSED*/ 462 static void 463 proc0_init(void *dummy __unused) 464 { 465 struct proc *p; 466 struct thread *td; 467 struct ucred *newcred; 468 struct uidinfo tmpuinfo; 469 struct loginclass tmplc = { 470 .lc_name = "", 471 }; 472 vm_paddr_t pageablemem; 473 int i; 474 475 GIANT_REQUIRED; 476 p = &proc0; 477 td = &thread0; 478 479 /* 480 * Initialize magic number and osrel. 481 */ 482 p->p_magic = P_MAGIC; 483 p->p_osrel = osreldate; 484 485 /* 486 * Initialize thread and process structures. 487 */ 488 procinit(); /* set up proc zone */ 489 threadinit(); /* set up UMA zones */ 490 491 /* 492 * Initialise scheduler resources. 493 * Add scheduler specific parts to proc, thread as needed. 494 */ 495 schedinit(); /* scheduler gets its house in order */ 496 497 /* 498 * Create process 0 (the swapper). 499 */ 500 LIST_INSERT_HEAD(&allproc, p, p_list); 501 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 502 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 503 sx_init(&pgrp0.pg_killsx, "killpg racer"); 504 p->p_pgrp = &pgrp0; 505 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 506 LIST_INIT(&pgrp0.pg_members); 507 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 508 509 pgrp0.pg_session = &session0; 510 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 511 refcount_init(&session0.s_count, 1); 512 session0.s_leader = p; 513 514 p->p_sysent = &null_sysvec; 515 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 516 p->p_flag2 = 0; 517 p->p_state = PRS_NORMAL; 518 p->p_klist = knlist_alloc(&p->p_mtx); 519 STAILQ_INIT(&p->p_ktr); 520 p->p_nice = NZERO; 521 td->td_tid = THREAD0_TID; 522 tidhash_add(td); 523 TD_SET_STATE(td, TDS_RUNNING); 524 td->td_pri_class = PRI_TIMESHARE; 525 td->td_user_pri = PUSER; 526 td->td_base_user_pri = PUSER; 527 td->td_lend_user_pri = PRI_MAX; 528 td->td_priority = PVM; 529 td->td_base_pri = PVM; 530 td->td_oncpu = curcpu; 531 td->td_flags = TDF_INMEM; 532 td->td_pflags = TDP_KTHREAD; 533 td->td_cpuset = cpuset_thread0(); 534 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 535 prison0_init(); 536 p->p_peers = 0; 537 p->p_leader = p; 538 p->p_reaper = p; 539 p->p_treeflag |= P_TREE_REAPER; 540 LIST_INIT(&p->p_reaplist); 541 542 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 543 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 544 545 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 546 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 547 callout_init(&td->td_slpcallout, 1); 548 TAILQ_INIT(&p->p_kqtim_stop); 549 550 /* Create credentials. */ 551 newcred = crget(); 552 newcred->cr_ngroups = 1; /* group 0 */ 553 /* A hack to prevent uifind from tripping over NULL pointers. */ 554 curthread->td_ucred = newcred; 555 tmpuinfo.ui_uid = 1; 556 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 557 newcred->cr_uidinfo = uifind(0); 558 newcred->cr_ruidinfo = uifind(0); 559 newcred->cr_loginclass = &tmplc; 560 newcred->cr_loginclass = loginclass_find("default"); 561 /* End hack. creds get properly set later with thread_cow_get_proc */ 562 curthread->td_ucred = NULL; 563 newcred->cr_prison = &prison0; 564 newcred->cr_users++; /* avoid assertion failure */ 565 proc_set_cred_init(p, newcred); 566 newcred->cr_users--; 567 crfree(newcred); 568 #ifdef AUDIT 569 audit_cred_kproc0(newcred); 570 #endif 571 #ifdef MAC 572 mac_cred_create_swapper(newcred); 573 #endif 574 /* Create sigacts. */ 575 p->p_sigacts = sigacts_alloc(); 576 577 /* Initialize signal state for process 0. */ 578 siginit(&proc0); 579 580 /* Create the file descriptor table. */ 581 p->p_pd = pdinit(NULL, false); 582 p->p_fd = fdinit(); 583 p->p_fdtol = NULL; 584 585 /* Create the limits structures. */ 586 p->p_limit = lim_alloc(); 587 for (i = 0; i < RLIM_NLIMITS; i++) 588 p->p_limit->pl_rlimit[i].rlim_cur = 589 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 590 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 591 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 592 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 593 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 594 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 595 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 596 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 597 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 598 /* Cast to avoid overflow on i386/PAE. */ 599 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 600 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 601 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 602 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 603 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 604 p->p_cpulimit = RLIM_INFINITY; 605 606 PROC_LOCK(p); 607 thread_cow_get_proc(td, p); 608 PROC_UNLOCK(p); 609 610 /* Initialize resource accounting structures. */ 611 racct_create(&p->p_racct); 612 613 p->p_stats = pstats_alloc(); 614 615 /* Allocate a prototype map so we have something to fork. */ 616 p->p_vmspace = &vmspace0; 617 refcount_init(&vmspace0.vm_refcnt, 1); 618 pmap_pinit0(vmspace_pmap(&vmspace0)); 619 620 /* 621 * proc0 is not expected to enter usermode, so there is no special 622 * handling for sv_minuser here, like is done for exec_new_vmspace(). 623 */ 624 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 625 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 626 627 /* 628 * Call the init and ctor for the new thread and proc. We wait 629 * to do this until all other structures are fairly sane. 630 */ 631 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 632 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 633 #ifdef KDTRACE_HOOKS 634 kdtrace_proc_ctor(p); 635 kdtrace_thread_ctor(td); 636 #endif 637 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 638 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 639 640 /* 641 * Charge root for one process. 642 */ 643 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 644 PROC_LOCK(p); 645 racct_add_force(p, RACCT_NPROC, 1); 646 PROC_UNLOCK(p); 647 } 648 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 649 650 /* ARGSUSED*/ 651 static void 652 proc0_post(void *dummy __unused) 653 { 654 struct proc *p; 655 struct rusage ru; 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 proc0 started now. 661 */ 662 sx_slock(&allproc_lock); 663 FOREACH_PROC_IN_SYSTEM(p) { 664 PROC_LOCK(p); 665 if (p->p_state == PRS_NEW) { 666 PROC_UNLOCK(p); 667 continue; 668 } 669 microuptime(&p->p_stats->p_start); 670 PROC_STATLOCK(p); 671 rufetch(p, &ru); /* Clears thread stats */ 672 p->p_rux.rux_runtime = 0; 673 p->p_rux.rux_uticks = 0; 674 p->p_rux.rux_sticks = 0; 675 p->p_rux.rux_iticks = 0; 676 PROC_STATUNLOCK(p); 677 FOREACH_THREAD_IN_PROC(p, td) { 678 td->td_runtime = 0; 679 } 680 PROC_UNLOCK(p); 681 } 682 sx_sunlock(&allproc_lock); 683 PCPU_SET(switchtime, cpu_ticks()); 684 PCPU_SET(switchticks, ticks); 685 } 686 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 687 688 /* 689 *************************************************************************** 690 **** 691 **** The following SYSINIT's and glue code should be moved to the 692 **** respective files on a per subsystem basis. 693 **** 694 *************************************************************************** 695 */ 696 697 /* 698 * List of paths to try when searching for "init". 699 */ 700 static char init_path[MAXPATHLEN] = 701 #ifdef INIT_PATH 702 __XSTRING(INIT_PATH); 703 #else 704 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 705 #endif 706 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 707 "Path used to search the init process"); 708 709 /* 710 * Shutdown timeout of init(8). 711 * Unused within kernel, but used to control init(8), hence do not remove. 712 */ 713 #ifndef INIT_SHUTDOWN_TIMEOUT 714 #define INIT_SHUTDOWN_TIMEOUT 120 715 #endif 716 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 717 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 718 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 719 "Unused within kernel, but used to control init(8)"); 720 721 /* 722 * Start the initial user process; try exec'ing each pathname in init_path. 723 * The program is invoked with one argument containing the boot flags. 724 */ 725 static void 726 start_init(void *dummy) 727 { 728 struct image_args args; 729 int error; 730 char *var, *path; 731 char *free_init_path, *tmp_init_path; 732 struct thread *td; 733 struct proc *p; 734 struct vmspace *oldvmspace; 735 736 TSENTER(); /* Here so we don't overlap with mi_startup. */ 737 738 td = curthread; 739 p = td->td_proc; 740 741 vfs_mountroot(); 742 743 /* Wipe GELI passphrase from the environment. */ 744 kern_unsetenv("kern.geom.eli.passphrase"); 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 if (bootverbose) 762 printf("start_init: trying %s\n", path); 763 764 memset(&args, 0, sizeof(args)); 765 error = exec_alloc_args(&args); 766 if (error != 0) 767 panic("%s: Can't allocate space for init arguments %d", 768 __func__, error); 769 770 error = exec_args_add_fname(&args, path, UIO_SYSSPACE); 771 if (error != 0) 772 panic("%s: Can't add fname %d", __func__, error); 773 error = exec_args_add_arg(&args, path, UIO_SYSSPACE); 774 if (error != 0) 775 panic("%s: Can't add argv[0] %d", __func__, error); 776 if (boothowto & RB_SINGLE) 777 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE); 778 if (error != 0) 779 panic("%s: Can't add argv[0] %d", __func__, error); 780 781 /* 782 * Now try to exec the program. If can't for any reason 783 * other than it doesn't exist, complain. 784 * 785 * Otherwise, return via fork_trampoline() all the way 786 * to user mode as init! 787 */ 788 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0, 789 ("nested execve")); 790 oldvmspace = p->p_vmspace; 791 error = kern_execve(td, &args, NULL, oldvmspace); 792 KASSERT(error != 0, 793 ("kern_execve returned success, not EJUSTRETURN")); 794 if (error == EJUSTRETURN) { 795 exec_cleanup(td, oldvmspace); 796 free(free_init_path, M_TEMP); 797 TSEXIT(); 798 return; 799 } 800 if (error != ENOENT) 801 printf("exec %s: error %d\n", path, error); 802 } 803 free(free_init_path, M_TEMP); 804 printf("init: not found in path %s\n", init_path); 805 panic("no init"); 806 } 807 808 /* 809 * Like kproc_create(), but runs in its own address space. We do this 810 * early to reserve pid 1. Note special case - do not make it 811 * runnable yet, init execution is started when userspace can be served. 812 */ 813 static void 814 create_init(const void *udata __unused) 815 { 816 struct fork_req fr; 817 struct ucred *newcred, *oldcred; 818 struct thread *td; 819 int error; 820 821 bzero(&fr, sizeof(fr)); 822 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 823 fr.fr_procp = &initproc; 824 error = fork1(&thread0, &fr); 825 if (error) 826 panic("cannot fork init: %d\n", error); 827 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 828 /* divorce init's credentials from the kernel's */ 829 newcred = crget(); 830 sx_xlock(&proctree_lock); 831 PROC_LOCK(initproc); 832 initproc->p_flag |= P_SYSTEM | P_INMEM; 833 initproc->p_treeflag |= P_TREE_REAPER; 834 oldcred = initproc->p_ucred; 835 crcopy(newcred, oldcred); 836 #ifdef MAC 837 mac_cred_create_init(newcred); 838 #endif 839 #ifdef AUDIT 840 audit_cred_proc1(newcred); 841 #endif 842 proc_set_cred(initproc, newcred); 843 td = FIRST_THREAD_IN_PROC(initproc); 844 crcowfree(td); 845 td->td_realucred = crcowget(initproc->p_ucred); 846 td->td_ucred = td->td_realucred; 847 PROC_UNLOCK(initproc); 848 sx_xunlock(&proctree_lock); 849 crfree(oldcred); 850 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 851 start_init, NULL); 852 } 853 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 854 855 /* 856 * Make it runnable now. 857 */ 858 static void 859 kick_init(const void *udata __unused) 860 { 861 struct thread *td; 862 863 td = FIRST_THREAD_IN_PROC(initproc); 864 thread_lock(td); 865 TD_SET_CAN_RUN(td); 866 sched_add(td, SRQ_BORING); 867 } 868 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 869 870 /* 871 * DDB(4). 872 */ 873 #ifdef DDB 874 static void 875 db_show_print_syinit(struct sysinit *sip, bool ddb) 876 { 877 const char *sname, *funcname; 878 c_db_sym_t sym; 879 db_expr_t offset; 880 881 #define xprint(...) \ 882 if (ddb) \ 883 db_printf(__VA_ARGS__); \ 884 else \ 885 printf(__VA_ARGS__) 886 887 if (sip == NULL) { 888 xprint("%s: no sysinit * given\n", __func__); 889 return; 890 } 891 892 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); 893 db_symbol_values(sym, &sname, NULL); 894 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); 895 db_symbol_values(sym, &funcname, NULL); 896 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); 897 xprint(" %#08x %#08x\n", sip->subsystem, sip->order); 898 xprint(" %p(%s)(%p)\n", 899 sip->func, (funcname != NULL) ? funcname : "", sip->udata); 900 #undef xprint 901 } 902 903 DB_SHOW_COMMAND_FLAGS(sysinit, db_show_sysinit, DB_CMD_MEMSAFE) 904 { 905 struct sysinit *sip; 906 907 db_printf("SYSINIT vs Name(Ptr)\n"); 908 db_printf(" Subsystem Order\n"); 909 db_printf(" Function(Name)(Arg)\n"); 910 STAILQ_FOREACH(sip, &sysinit_done_list, next) { 911 db_show_print_syinit(sip, true); 912 if (db_pager_quit) 913 return; 914 } 915 STAILQ_FOREACH(sip, &sysinit_list, next) { 916 db_show_print_syinit(sip, true); 917 if (db_pager_quit) 918 break; 919 } 920 } 921 #endif /* DDB */ 922