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_init_path.h" 48 #include "opt_mac.h" 49 50 #include <sys/param.h> 51 #include <sys/kernel.h> 52 #include <sys/exec.h> 53 #include <sys/file.h> 54 #include <sys/filedesc.h> 55 #include <sys/ktr.h> 56 #include <sys/lock.h> 57 #include <sys/mac.h> 58 #include <sys/mount.h> 59 #include <sys/mutex.h> 60 #include <sys/syscallsubr.h> 61 #include <sys/sysctl.h> 62 #include <sys/proc.h> 63 #include <sys/resourcevar.h> 64 #include <sys/systm.h> 65 #include <sys/signalvar.h> 66 #include <sys/vnode.h> 67 #include <sys/sysent.h> 68 #include <sys/reboot.h> 69 #include <sys/sched.h> 70 #include <sys/sx.h> 71 #include <sys/sysproto.h> 72 #include <sys/vmmeter.h> 73 #include <sys/unistd.h> 74 #include <sys/malloc.h> 75 #include <sys/conf.h> 76 77 #include <machine/cpu.h> 78 79 #include <vm/vm.h> 80 #include <vm/vm_param.h> 81 #include <vm/pmap.h> 82 #include <vm/vm_map.h> 83 #include <sys/user.h> 84 #include <sys/copyright.h> 85 86 void mi_startup(void); /* Should be elsewhere */ 87 88 /* Components of the first process -- never freed. */ 89 static struct session session0; 90 static struct pgrp pgrp0; 91 struct proc proc0; 92 struct thread thread0; 93 struct kse kse0; 94 struct ksegrp ksegrp0; 95 static struct filedesc0 filedesc0; 96 static struct plimit limit0; 97 struct vmspace vmspace0; 98 struct proc *initproc; 99 100 int cmask = CMASK; 101 102 struct vnode *rootvp; 103 int boothowto = 0; /* initialized so that it can be patched */ 104 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, ""); 105 int bootverbose; 106 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, ""); 107 108 /* 109 * This ensures that there is at least one entry so that the sysinit_set 110 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 111 * executed. 112 */ 113 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL) 114 115 /* 116 * The sysinit table itself. Items are checked off as the are run. 117 * If we want to register new sysinit types, add them to newsysinit. 118 */ 119 SET_DECLARE(sysinit_set, struct sysinit); 120 struct sysinit **sysinit, **sysinit_end; 121 struct sysinit **newsysinit, **newsysinit_end; 122 123 /* 124 * Merge a new sysinit set into the current set, reallocating it if 125 * necessary. This can only be called after malloc is running. 126 */ 127 void 128 sysinit_add(struct sysinit **set, struct sysinit **set_end) 129 { 130 struct sysinit **newset; 131 struct sysinit **sipp; 132 struct sysinit **xipp; 133 int count; 134 135 count = set_end - set; 136 if (newsysinit) 137 count += newsysinit_end - newsysinit; 138 else 139 count += sysinit_end - sysinit; 140 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 141 if (newset == NULL) 142 panic("cannot malloc for sysinit"); 143 xipp = newset; 144 if (newsysinit) 145 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 146 *xipp++ = *sipp; 147 else 148 for (sipp = sysinit; sipp < sysinit_end; sipp++) 149 *xipp++ = *sipp; 150 for (sipp = set; sipp < set_end; sipp++) 151 *xipp++ = *sipp; 152 if (newsysinit) 153 free(newsysinit, M_TEMP); 154 newsysinit = newset; 155 newsysinit_end = newset + count; 156 } 157 158 /* 159 * System startup; initialize the world, create process 0, mount root 160 * filesystem, and fork to create init and pagedaemon. Most of the 161 * hard work is done in the lower-level initialization routines including 162 * startup(), which does memory initialization and autoconfiguration. 163 * 164 * This allows simple addition of new kernel subsystems that require 165 * boot time initialization. It also allows substitution of subsystem 166 * (for instance, a scheduler, kernel profiler, or VM system) by object 167 * module. Finally, it allows for optional "kernel threads". 168 */ 169 void 170 mi_startup(void) 171 { 172 173 register struct sysinit **sipp; /* system initialization*/ 174 register struct sysinit **xipp; /* interior loop of sort*/ 175 register struct sysinit *save; /* bubble*/ 176 177 if (sysinit == NULL) { 178 sysinit = SET_BEGIN(sysinit_set); 179 sysinit_end = SET_LIMIT(sysinit_set); 180 } 181 182 restart: 183 /* 184 * Perform a bubble sort of the system initialization objects by 185 * their subsystem (primary key) and order (secondary key). 186 */ 187 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 188 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 189 if ((*sipp)->subsystem < (*xipp)->subsystem || 190 ((*sipp)->subsystem == (*xipp)->subsystem && 191 (*sipp)->order <= (*xipp)->order)) 192 continue; /* skip*/ 193 save = *sipp; 194 *sipp = *xipp; 195 *xipp = save; 196 } 197 } 198 199 /* 200 * Traverse the (now) ordered list of system initialization tasks. 201 * Perform each task, and continue on to the next task. 202 * 203 * The last item on the list is expected to be the scheduler, 204 * which will not return. 205 */ 206 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 207 208 if ((*sipp)->subsystem == SI_SUB_DUMMY) 209 continue; /* skip dummy task(s)*/ 210 211 if ((*sipp)->subsystem == SI_SUB_DONE) 212 continue; 213 214 /* Call function */ 215 (*((*sipp)->func))((*sipp)->udata); 216 217 /* Check off the one we're just done */ 218 (*sipp)->subsystem = SI_SUB_DONE; 219 220 /* Check if we've installed more sysinit items via KLD */ 221 if (newsysinit != NULL) { 222 if (sysinit != SET_BEGIN(sysinit_set)) 223 free(sysinit, M_TEMP); 224 sysinit = newsysinit; 225 sysinit_end = newsysinit_end; 226 newsysinit = NULL; 227 newsysinit_end = NULL; 228 goto restart; 229 } 230 } 231 232 panic("Shouldn't get here!"); 233 /* NOTREACHED*/ 234 } 235 236 237 /* 238 *************************************************************************** 239 **** 240 **** The following SYSINIT's belong elsewhere, but have not yet 241 **** been moved. 242 **** 243 *************************************************************************** 244 */ 245 static void 246 print_caddr_t(void *data __unused) 247 { 248 printf("%s", (char *)data); 249 } 250 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright) 251 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, version) 252 253 static void 254 set_boot_verbose(void *data __unused) 255 { 256 257 if (boothowto & RB_VERBOSE) 258 bootverbose++; 259 } 260 SYSINIT(boot_verbose, SI_SUB_TUNABLES, SI_ORDER_ANY, set_boot_verbose, NULL) 261 262 struct sysentvec null_sysvec = { 263 0, 264 NULL, 265 0, 266 0, 267 NULL, 268 0, 269 NULL, 270 NULL, 271 NULL, 272 NULL, 273 NULL, 274 NULL, 275 NULL, 276 "null", 277 NULL, 278 NULL, 279 0, 280 PAGE_SIZE, 281 VM_MIN_ADDRESS, 282 VM_MAXUSER_ADDRESS, 283 USRSTACK, 284 PS_STRINGS, 285 VM_PROT_ALL, 286 NULL, 287 NULL 288 }; 289 290 /* 291 *************************************************************************** 292 **** 293 **** The two following SYSINIT's are proc0 specific glue code. I am not 294 **** convinced that they can not be safely combined, but their order of 295 **** operation has been maintained as the same as the original init_main.c 296 **** for right now. 297 **** 298 **** These probably belong in init_proc.c or kern_proc.c, since they 299 **** deal with proc0 (the fork template process). 300 **** 301 *************************************************************************** 302 */ 303 /* ARGSUSED*/ 304 static void 305 proc0_init(void *dummy __unused) 306 { 307 register struct proc *p; 308 register struct filedesc0 *fdp; 309 register unsigned i; 310 struct thread *td; 311 struct ksegrp *kg; 312 struct kse *ke; 313 314 GIANT_REQUIRED; 315 p = &proc0; 316 td = &thread0; 317 ke = &kse0; 318 kg = &ksegrp0; 319 320 ke->ke_sched = kse0_sched; 321 kg->kg_sched = ksegrp0_sched; 322 p->p_sched = proc0_sched; 323 td->td_sched = thread0_sched; 324 325 /* 326 * Initialize magic number. 327 */ 328 p->p_magic = P_MAGIC; 329 330 /* 331 * Initialize thread, process and pgrp structures. 332 */ 333 procinit(); 334 threadinit(); 335 336 /* 337 * Initialize sleep queue hash table 338 */ 339 sleepinit(); 340 341 /* 342 * additional VM structures 343 */ 344 vm_init2(); 345 346 /* 347 * Create process 0 (the swapper). 348 */ 349 LIST_INSERT_HEAD(&allproc, p, p_list); 350 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 351 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 352 p->p_pgrp = &pgrp0; 353 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 354 LIST_INIT(&pgrp0.pg_members); 355 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 356 357 pgrp0.pg_session = &session0; 358 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 359 session0.s_count = 1; 360 session0.s_leader = p; 361 362 p->p_sysent = &null_sysvec; 363 364 /* 365 * proc_linkup was already done in init_i386() or alphainit() etc. 366 * because the earlier code needed to follow td->td_proc. Otherwise 367 * I would have done it here.. maybe this means this should be 368 * done earlier too. 369 */ 370 p->p_flag = P_SYSTEM; 371 p->p_sflag = PS_INMEM; 372 p->p_state = PRS_NORMAL; 373 td->td_state = TDS_RUNNING; 374 kg->kg_nice = NZERO; 375 kg->kg_pri_class = PRI_TIMESHARE; 376 kg->kg_user_pri = PUSER; 377 td->td_priority = PVM; 378 td->td_base_pri = PUSER; 379 td->td_kse = ke; /* XXXKSE */ 380 td->td_oncpu = 0; 381 ke->ke_state = KES_THREAD; 382 ke->ke_thread = td; 383 p->p_peers = 0; 384 p->p_leader = p; 385 386 387 bcopy("swapper", p->p_comm, sizeof ("swapper")); 388 389 callout_init(&p->p_itcallout, CALLOUT_MPSAFE); 390 callout_init(&td->td_slpcallout, CALLOUT_MPSAFE); 391 392 /* Create credentials. */ 393 p->p_ucred = crget(); 394 p->p_ucred->cr_ngroups = 1; /* group 0 */ 395 p->p_ucred->cr_uidinfo = uifind(0); 396 p->p_ucred->cr_ruidinfo = uifind(0); 397 p->p_ucred->cr_prison = NULL; /* Don't jail it. */ 398 #ifdef MAC 399 mac_create_proc0(p->p_ucred); 400 #endif 401 td->td_ucred = crhold(p->p_ucred); 402 403 /* Create sigacts. */ 404 p->p_sigacts = sigacts_alloc(); 405 406 /* Initialize signal state for process 0. */ 407 siginit(&proc0); 408 409 /* Create the file descriptor table. */ 410 fdp = &filedesc0; 411 p->p_fd = &fdp->fd_fd; 412 p->p_fdtol = NULL; 413 mtx_init(&fdp->fd_fd.fd_mtx, FILEDESC_LOCK_DESC, NULL, MTX_DEF); 414 fdp->fd_fd.fd_refcnt = 1; 415 fdp->fd_fd.fd_cmask = cmask; 416 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles; 417 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags; 418 fdp->fd_fd.fd_nfiles = NDFILE; 419 420 /* Create the limits structures. */ 421 p->p_limit = &limit0; 422 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 423 limit0.pl_rlimit[i].rlim_cur = 424 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 425 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = 426 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 427 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = 428 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 429 i = ptoa(cnt.v_free_count); 430 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i; 431 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i; 432 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3; 433 limit0.p_refcnt = 1; 434 p->p_cpulimit = RLIM_INFINITY; 435 436 /* Allocate a prototype map so we have something to fork. */ 437 pmap_pinit0(vmspace_pmap(&vmspace0)); 438 p->p_vmspace = &vmspace0; 439 vmspace0.vm_refcnt = 1; 440 vm_map_init(&vmspace0.vm_map, p->p_sysent->sv_minuser, 441 p->p_sysent->sv_maxuser); 442 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0); 443 444 /* 445 * We continue to place resource usage info 446 * in the user struct so that it's pageable. 447 */ 448 p->p_stats = &p->p_uarea->u_stats; 449 450 /* 451 * Charge root for one process. 452 */ 453 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 454 } 455 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL) 456 457 /* ARGSUSED*/ 458 static void 459 proc0_post(void *dummy __unused) 460 { 461 struct timespec ts; 462 struct proc *p; 463 464 /* 465 * Now we can look at the time, having had a chance to verify the 466 * time from the filesystem. Pretend that proc0 started now. 467 */ 468 sx_slock(&allproc_lock); 469 LIST_FOREACH(p, &allproc, p_list) { 470 microuptime(&p->p_stats->p_start); 471 p->p_runtime.sec = 0; 472 p->p_runtime.frac = 0; 473 } 474 sx_sunlock(&allproc_lock); 475 binuptime(PCPU_PTR(switchtime)); 476 PCPU_SET(switchticks, ticks); 477 478 /* 479 * Give the ``random'' number generator a thump. 480 */ 481 nanotime(&ts); 482 srandom(ts.tv_sec ^ ts.tv_nsec); 483 } 484 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL) 485 486 /* 487 *************************************************************************** 488 **** 489 **** The following SYSINIT's and glue code should be moved to the 490 **** respective files on a per subsystem basis. 491 **** 492 *************************************************************************** 493 */ 494 495 496 /* 497 *************************************************************************** 498 **** 499 **** The following code probably belongs in another file, like 500 **** kern/init_init.c. 501 **** 502 *************************************************************************** 503 */ 504 505 /* 506 * List of paths to try when searching for "init". 507 */ 508 static char init_path[MAXPATHLEN] = 509 #ifdef INIT_PATH 510 __XSTRING(INIT_PATH); 511 #else 512 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall"; 513 #endif 514 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 515 "Path used to search the init process"); 516 517 /* 518 * Start the initial user process; try exec'ing each pathname in init_path. 519 * The program is invoked with one argument containing the boot flags. 520 */ 521 static void 522 start_init(void *dummy) 523 { 524 vm_offset_t addr; 525 struct execve_args args; 526 int options, error; 527 char *var, *path, *next, *s; 528 char *ucp, **uap, *arg0, *arg1; 529 struct thread *td; 530 struct proc *p; 531 int init_does_devfs = 0; 532 533 mtx_lock(&Giant); 534 535 GIANT_REQUIRED; 536 537 td = curthread; 538 p = td->td_proc; 539 540 vfs_mountroot(); 541 542 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 543 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 544 panic("cannot find root vnode"); 545 FILEDESC_LOCK(p->p_fd); 546 p->p_fd->fd_cdir = rootvnode; 547 VREF(p->p_fd->fd_cdir); 548 p->p_fd->fd_rdir = rootvnode; 549 VREF(p->p_fd->fd_rdir); 550 FILEDESC_UNLOCK(p->p_fd); 551 VOP_UNLOCK(rootvnode, 0, td); 552 #ifdef MAC 553 mac_create_root_mount(td->td_ucred, TAILQ_FIRST(&mountlist)); 554 #endif 555 556 /* 557 * For disk based systems, we probably cannot do this yet 558 * since the fs will be read-only. But a NFS root 559 * might be ok. It is worth a shot. 560 */ 561 error = kern_mkdir(td, "/dev", UIO_SYSSPACE, 0700); 562 if (error == EEXIST) 563 error = 0; 564 if (error == 0) 565 error = kernel_vmount(0, "fstype", "devfs", 566 "fspath", "/dev", NULL); 567 if (error != 0) 568 init_does_devfs = 1; 569 570 /* 571 * Need just enough stack to hold the faked-up "execve()" arguments. 572 */ 573 addr = p->p_sysent->sv_usrstack - PAGE_SIZE; 574 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE, 575 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0) 576 panic("init: couldn't allocate argument space"); 577 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 578 p->p_vmspace->vm_ssize = 1; 579 580 if ((var = getenv("init_path")) != NULL) { 581 strlcpy(init_path, var, sizeof(init_path)); 582 freeenv(var); 583 } 584 585 for (path = init_path; *path != '\0'; path = next) { 586 while (*path == ':') 587 path++; 588 if (*path == '\0') 589 break; 590 for (next = path; *next != '\0' && *next != ':'; next++) 591 /* nothing */ ; 592 if (bootverbose) 593 printf("start_init: trying %.*s\n", (int)(next - path), 594 path); 595 596 /* 597 * Move out the boot flag argument. 598 */ 599 options = 0; 600 ucp = (char *)p->p_sysent->sv_usrstack; 601 (void)subyte(--ucp, 0); /* trailing zero */ 602 if (boothowto & RB_SINGLE) { 603 (void)subyte(--ucp, 's'); 604 options = 1; 605 } 606 #ifdef notyet 607 if (boothowto & RB_FASTBOOT) { 608 (void)subyte(--ucp, 'f'); 609 options = 1; 610 } 611 #endif 612 613 #ifdef BOOTCDROM 614 (void)subyte(--ucp, 'C'); 615 options = 1; 616 #endif 617 if (init_does_devfs) { 618 (void)subyte(--ucp, 'd'); 619 options = 1; 620 } 621 622 if (options == 0) 623 (void)subyte(--ucp, '-'); 624 (void)subyte(--ucp, '-'); /* leading hyphen */ 625 arg1 = ucp; 626 627 /* 628 * Move out the file name (also arg 0). 629 */ 630 (void)subyte(--ucp, 0); 631 for (s = next - 1; s >= path; s--) 632 (void)subyte(--ucp, *s); 633 arg0 = ucp; 634 635 /* 636 * Move out the arg pointers. 637 */ 638 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 639 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 640 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 641 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 642 643 /* 644 * Point at the arguments. 645 */ 646 args.fname = arg0; 647 args.argv = uap; 648 args.envv = NULL; 649 650 /* 651 * Now try to exec the program. If can't for any reason 652 * other than it doesn't exist, complain. 653 * 654 * Otherwise, return via fork_trampoline() all the way 655 * to user mode as init! 656 */ 657 if ((error = execve(td, &args)) == 0) { 658 mtx_unlock(&Giant); 659 return; 660 } 661 if (error != ENOENT) 662 printf("exec %.*s: error %d\n", (int)(next - path), 663 path, error); 664 } 665 printf("init: not found in path %s\n", init_path); 666 panic("no init"); 667 } 668 669 /* 670 * Like kthread_create(), but runs in it's own address space. 671 * We do this early to reserve pid 1. 672 * 673 * Note special case - do not make it runnable yet. Other work 674 * in progress will change this more. 675 */ 676 static void 677 create_init(const void *udata __unused) 678 { 679 struct ucred *newcred, *oldcred; 680 int error; 681 682 error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc); 683 if (error) 684 panic("cannot fork init: %d\n", error); 685 /* divorce init's credentials from the kernel's */ 686 newcred = crget(); 687 PROC_LOCK(initproc); 688 initproc->p_flag |= P_SYSTEM; 689 oldcred = initproc->p_ucred; 690 crcopy(newcred, oldcred); 691 #ifdef MAC 692 mac_create_proc1(newcred); 693 #endif 694 initproc->p_ucred = newcred; 695 PROC_UNLOCK(initproc); 696 crfree(oldcred); 697 cred_update_thread(FIRST_THREAD_IN_PROC(initproc)); 698 mtx_lock_spin(&sched_lock); 699 initproc->p_sflag |= PS_INMEM; 700 mtx_unlock_spin(&sched_lock); 701 cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL); 702 } 703 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL) 704 705 /* 706 * Make it runnable now. 707 */ 708 static void 709 kick_init(const void *udata __unused) 710 { 711 struct thread *td; 712 713 td = FIRST_THREAD_IN_PROC(initproc); 714 mtx_lock_spin(&sched_lock); 715 TD_SET_CAN_RUN(td); 716 setrunqueue(td); /* XXXKSE */ 717 mtx_unlock_spin(&sched_lock); 718 } 719 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL) 720