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. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 38 * $FreeBSD: src/sys/kern/init_main.c,v 1.134.2.8 2003/06/06 20:21:32 tegge Exp $ 39 */ 40 41 #include "opt_init_path.h" 42 43 #include <sys/param.h> 44 #include <sys/file.h> 45 #include <sys/filedesc.h> 46 #include <sys/kernel.h> 47 #include <sys/mount.h> 48 #include <sys/sysctl.h> 49 #include <sys/proc.h> 50 #include <sys/resourcevar.h> 51 #include <sys/signalvar.h> 52 #include <sys/systm.h> 53 #include <sys/vnode.h> 54 #include <sys/sysent.h> 55 #include <sys/reboot.h> 56 #include <sys/sysproto.h> 57 #include <sys/vmmeter.h> 58 #include <sys/unistd.h> 59 #include <sys/malloc.h> 60 #include <sys/machintr.h> 61 62 #include <sys/refcount.h> 63 #include <sys/file2.h> 64 #include <sys/thread2.h> 65 #include <sys/sysref2.h> 66 #include <sys/spinlock2.h> 67 #include <sys/mplock2.h> 68 69 #include <machine/cpu.h> 70 71 #include <vm/vm.h> 72 #include <vm/vm_param.h> 73 #include <sys/lock.h> 74 #include <vm/pmap.h> 75 #include <vm/vm_map.h> 76 #include <vm/vm_extern.h> 77 #include <sys/user.h> 78 #include <sys/copyright.h> 79 80 int vfs_mountroot_devfs(void); 81 82 /* Components of the first process -- never freed. */ 83 static struct session session0; 84 static struct pgrp pgrp0; 85 static struct sigacts sigacts0; 86 static struct filedesc filedesc0; 87 static struct plimit limit0; 88 static struct vmspace vmspace0; 89 struct proc *initproc; 90 struct proc proc0; 91 struct lwp lwp0; 92 struct thread thread0; 93 struct sys_kpmap *kpmap; 94 struct sysreaper initreaper; 95 96 int cmask = CMASK; 97 u_int cpu_mi_feature; 98 cpumask_t usched_global_cpumask; 99 extern struct user *proc0paddr; 100 101 int boothowto = 0; /* initialized so that it can be patched */ 102 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 103 "Reboot flags, from console subsystem"); 104 SYSCTL_OPAQUE(_kern, OID_AUTO, usched_global_cpumask, CTLFLAG_RW, 105 &usched_global_cpumask, sizeof(usched_global_cpumask), "LU", 106 "global user scheduler cpumask"); 107 108 /* 109 * This ensures that there is at least one entry so that the sysinit_set 110 * symbol is not undefined. A subsystem ID of SI_SPECIAL_DUMMY is never 111 * executed. 112 */ 113 SYSINIT(placeholder, SI_SPECIAL_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 /* 125 * Merge a new sysinit set into the current set, reallocating it if 126 * necessary. This can only be called after malloc is running. 127 */ 128 void 129 sysinit_add(struct sysinit **set, struct sysinit **set_end) 130 { 131 struct sysinit **newset; 132 struct sysinit **sipp; 133 struct sysinit **xipp; 134 int count; 135 136 count = set_end - set; 137 if (newsysinit) 138 count += newsysinit_end - newsysinit; 139 else 140 count += sysinit_end - sysinit; 141 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK); 142 xipp = newset; 143 if (newsysinit) { 144 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 145 *xipp++ = *sipp; 146 } else { 147 for (sipp = sysinit; sipp < sysinit_end; sipp++) 148 *xipp++ = *sipp; 149 } 150 for (sipp = set; sipp < set_end; sipp++) 151 *xipp++ = *sipp; 152 if (newsysinit) 153 kfree(newsysinit, M_TEMP); 154 newsysinit = newset; 155 newsysinit_end = newset + count; 156 } 157 158 /* 159 * Callbacks from machine-dependant startup code (e.g. init386) to set 160 * up low level entities related to cpu #0's globaldata. 161 * 162 * Called from very low level boot code. 163 */ 164 void 165 mi_proc0init(struct globaldata *gd, struct user *proc0paddr) 166 { 167 lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd); 168 lwkt_set_comm(&thread0, "thread0"); 169 RB_INIT(&proc0.p_lwp_tree); 170 spin_init(&proc0.p_spin, "iproc_proc0"); 171 lwkt_token_init(&proc0.p_token, "iproc"); 172 proc0.p_lasttid = 0; /* +1 = next TID */ 173 lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0); 174 lwp0.lwp_thread = &thread0; 175 lwp0.lwp_proc = &proc0; 176 proc0.p_usched = usched_init(); 177 CPUMASK_ASSALLONES(lwp0.lwp_cpumask); 178 lwkt_token_init(&lwp0.lwp_token, "lwp_token"); 179 spin_init(&lwp0.lwp_spin, "iproc_lwp0"); 180 varsymset_init(&proc0.p_varsymset, NULL); 181 thread0.td_flags |= TDF_RUNNING; 182 thread0.td_proc = &proc0; 183 thread0.td_lwp = &lwp0; 184 thread0.td_switch = cpu_lwkt_switch; 185 lwkt_schedule_self(curthread); 186 } 187 188 /* 189 * System startup; initialize the world, create process 0, mount root 190 * filesystem, and fork to create init and pagedaemon. Most of the 191 * hard work is done in the lower-level initialization routines including 192 * startup(), which does memory initialization and autoconfiguration. 193 * 194 * This allows simple addition of new kernel subsystems that require 195 * boot time initialization. It also allows substitution of subsystem 196 * (for instance, a scheduler, kernel profiler, or VM system) by object 197 * module. Finally, it allows for optional "kernel threads". 198 */ 199 void 200 mi_startup(void) 201 { 202 struct sysinit *sip; /* system initialization*/ 203 struct sysinit **sipp; /* system initialization*/ 204 struct sysinit **xipp; /* interior loop of sort*/ 205 struct sysinit *save; /* bubble*/ 206 207 if (sysinit == NULL) { 208 sysinit = SET_BEGIN(sysinit_set); 209 #if defined(__x86_64__) && defined(_KERNEL_VIRTUAL) 210 /* 211 * XXX For whatever reason, on 64-bit vkernels 212 * the value of sysinit obtained from the 213 * linker set is wrong. 214 */ 215 if ((long)sysinit % 8 != 0) { 216 kprintf("Fixing sysinit value...\n"); 217 sysinit = (void *)((long)(intptr_t)sysinit + 4); 218 } 219 #endif 220 sysinit_end = SET_LIMIT(sysinit_set); 221 } 222 #if defined(__x86_64__) && defined(_KERNEL_VIRTUAL) 223 KKASSERT((long)sysinit % 8 == 0); 224 #endif 225 226 restart: 227 /* 228 * Perform a bubble sort of the system initialization objects by 229 * their subsystem (primary key) and order (secondary key). 230 */ 231 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 232 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 233 if ((*sipp)->subsystem < (*xipp)->subsystem || 234 ((*sipp)->subsystem == (*xipp)->subsystem && 235 (*sipp)->order <= (*xipp)->order)) 236 continue; /* skip*/ 237 save = *sipp; 238 *sipp = *xipp; 239 *xipp = save; 240 } 241 } 242 243 /* 244 * Traverse the (now) ordered list of system initialization tasks. 245 * Perform each task, and continue on to the next task. 246 * 247 * The last item on the list is expected to be the scheduler, 248 * which will not return. 249 */ 250 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 251 sip = *sipp; 252 if (sip->subsystem == SI_SPECIAL_DUMMY) 253 continue; /* skip dummy task(s)*/ 254 255 if (sip->subsystem == SI_SPECIAL_DONE) 256 continue; 257 258 #if 0 259 if (bootverbose) 260 kprintf("(%08x-%p)\n", sip->subsystem, sip->func); 261 #endif 262 263 /* Call function */ 264 (*(sip->func))(sip->udata); 265 266 /* Check off the one we're just done */ 267 sip->subsystem = SI_SPECIAL_DONE; 268 269 /* Check if we've installed more sysinit items via KLD */ 270 if (newsysinit != NULL) { 271 if (sysinit != SET_BEGIN(sysinit_set)) 272 kfree(sysinit, M_TEMP); 273 sysinit = newsysinit; 274 sysinit_end = newsysinit_end; 275 newsysinit = NULL; 276 newsysinit_end = NULL; 277 goto restart; 278 } 279 } 280 281 panic("Shouldn't get here!"); 282 /* NOTREACHED*/ 283 } 284 285 286 /* 287 *************************************************************************** 288 **** 289 **** The following SYSINIT's belong elsewhere, but have not yet 290 **** been moved. 291 **** 292 *************************************************************************** 293 */ 294 static void 295 print_caddr_t(void *data) 296 { 297 kprintf("%s", (char *)data); 298 } 299 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright); 300 301 /* 302 * Leave the critical section that protected us from spurious interrupts 303 * so device probes work. 304 */ 305 static void 306 leavecrit(void *dummy __unused) 307 { 308 MachIntrABI.stabilize(); 309 cpu_enable_intr(); 310 MachIntrABI.cleanup(); 311 crit_exit(); 312 KKASSERT(!IN_CRITICAL_SECT(curthread)); 313 314 if (bootverbose) 315 kprintf("Leaving critical section, allowing interrupts\n"); 316 } 317 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL); 318 319 /* 320 * This is called after the threading system is up and running, 321 * including the softclock, clock interrupts, and SMP. 322 */ 323 static void 324 tsleepworks(void *dummy __unused) 325 { 326 tsleep_now_works = 1; 327 } 328 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL); 329 330 /* 331 * This is called after devices have configured. Tell the kernel we are 332 * no longer in cold boot. 333 */ 334 static void 335 endofcoldboot(void *dummy __unused) 336 { 337 cold = 0; 338 } 339 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL); 340 341 /* 342 *************************************************************************** 343 **** 344 **** The two following SYSINT's are proc0 specific glue code. I am not 345 **** convinced that they can not be safely combined, but their order of 346 **** operation has been maintained as the same as the original init_main.c 347 **** for right now. 348 **** 349 **** These probably belong in init_proc.c or kern_proc.c, since they 350 **** deal with proc0 (the fork template process). 351 **** 352 *************************************************************************** 353 */ 354 /* ARGSUSED*/ 355 static void 356 proc0_init(void *dummy __unused) 357 { 358 struct proc *p; 359 struct lwp *lp; 360 361 p = &proc0; 362 lp = &lwp0; 363 364 /* 365 * Initialize osrel 366 */ 367 p->p_osrel = osreldate; 368 369 /* 370 * Initialize process and pgrp structures. 371 */ 372 procinit(); 373 374 /* 375 * additional VM structures 376 */ 377 vm_init2(); 378 379 /* 380 * Create process 0 (the swapper). 381 */ 382 procinsertinit(p); 383 pgrpinsertinit(&pgrp0); 384 LIST_INIT(&pgrp0.pg_members); 385 lwkt_token_init(&pgrp0.pg_token, "pgrp0"); 386 refcount_init(&pgrp0.pg_refs, 1); 387 lockinit(&pgrp0.pg_lock, "pgwt0", 0, 0); 388 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 389 390 pgrp0.pg_session = &session0; 391 session0.s_count = 1; 392 session0.s_leader = p; 393 sessinsertinit(&session0); 394 395 pgref(&pgrp0); 396 p->p_pgrp = &pgrp0; 397 398 p->p_sysent = &aout_sysvec; 399 400 p->p_flags = P_SYSTEM; 401 p->p_stat = SACTIVE; 402 lp->lwp_stat = LSRUN; 403 p->p_nice = NZERO; 404 p->p_rtprio.type = RTP_PRIO_NORMAL; 405 p->p_rtprio.prio = 0; 406 lp->lwp_rtprio = p->p_rtprio; 407 408 p->p_peers = NULL; 409 p->p_leader = p; 410 411 bcopy("swapper", p->p_comm, sizeof ("swapper")); 412 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 413 414 /* Create credentials. */ 415 p->p_ucred = crget(); 416 p->p_ucred->cr_ruidinfo = uifind(0); 417 p->p_ucred->cr_ngroups = 1; /* group 0 */ 418 p->p_ucred->cr_uidinfo = uifind(0); 419 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 420 421 /* Don't jail it */ 422 p->p_ucred->cr_prison = NULL; 423 424 /* Create sigacts. */ 425 p->p_sigacts = &sigacts0; 426 refcount_init(&p->p_sigacts->ps_refcnt, 1); 427 428 /* Initialize signal state for process 0. */ 429 siginit(p); 430 431 /* Create the file descriptor table. */ 432 fdinit_bootstrap(p, &filedesc0, cmask); 433 434 /* Create the limits structures. */ 435 plimit_init0(&limit0); 436 p->p_limit = &limit0; 437 438 /* Allocate a prototype map so we have something to fork. */ 439 pmap_pinit0(vmspace_pmap(&vmspace0)); 440 p->p_vmspace = &vmspace0; 441 lp->lwp_vmspace = p->p_vmspace; 442 vmspace_initrefs(&vmspace0); 443 vm_map_init(&vmspace0.vm_map, 444 round_page(VM_MIN_USER_ADDRESS), 445 trunc_page(VM_MAX_USER_ADDRESS), 446 vmspace_pmap(&vmspace0)); 447 448 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 449 450 /* 451 * Charge root for one process. 452 */ 453 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 454 vm_init_limits(p); 455 } 456 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL); 457 458 static int proc0_post_callback(struct proc *p, void *data __unused); 459 460 /* ARGSUSED*/ 461 static void 462 proc0_post(void *dummy __unused) 463 { 464 struct timespec ts; 465 466 /* 467 * Now we can look at the time, having had a chance to verify the 468 * time from the file system. Pretend that proc0 started now. 469 */ 470 allproc_scan(proc0_post_callback, NULL); 471 472 /* 473 * Give the ``random'' number generator a thump. 474 * XXX: Does read_random() contain enough bits to be used here ? 475 */ 476 nanotime(&ts); 477 skrandom(ts.tv_sec ^ ts.tv_nsec); 478 } 479 480 static int 481 proc0_post_callback(struct proc *p, void *data __unused) 482 { 483 microtime(&p->p_start); 484 return(0); 485 } 486 487 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL); 488 489 /* 490 *************************************************************************** 491 **** 492 **** The following SYSINIT's and glue code should be moved to the 493 **** respective files on a per subsystem basis. 494 **** 495 *************************************************************************** 496 */ 497 498 499 /* 500 *************************************************************************** 501 **** 502 **** The following code probably belongs in another file, like 503 **** kern/init_init.c. 504 **** 505 *************************************************************************** 506 */ 507 508 /* 509 * List of paths to try when searching for "init". 510 */ 511 static char init_path[MAXPATHLEN] = 512 #ifdef INIT_PATH 513 __XSTRING(INIT_PATH); 514 #else 515 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 516 #endif 517 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 518 519 /* 520 * Shutdown timeout of init(8). 521 * Unused within kernel, but used to control init(8), hence do not remove. 522 */ 523 #ifndef INIT_SHUTDOWN_TIMEOUT 524 #define INIT_SHUTDOWN_TIMEOUT 120 525 #endif 526 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 527 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 528 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 529 "Unused within kernel, but used to control init(8)"); 530 531 /* 532 * Start the initial user process; try exec'ing each pathname in init_path. 533 * The program is invoked with one argument containing the boot flags. 534 */ 535 static void 536 start_init(void *dummy, struct trapframe *frame) 537 { 538 vm_offset_t addr; 539 struct execve_args args; 540 int options, error; 541 char *var, *path, *next, *s; 542 char *ucp, **uap, *arg0, *arg1; 543 struct proc *p; 544 struct lwp *lp; 545 struct mount *mp; 546 struct vnode *vp; 547 char *env; 548 549 /* 550 * This is passed in by the bootloader 551 */ 552 env = kgetenv("kernelname"); 553 if (env != NULL) 554 strlcpy(kernelname, env, sizeof(kernelname)); 555 556 /* 557 * The MP lock is not held on entry. We release it before 558 * returning to userland. 559 */ 560 get_mplock(); 561 p = curproc; 562 563 lp = ONLY_LWP_IN_PROC(p); 564 565 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 566 mp = mountlist_boot_getfirst(); 567 if (VFS_ROOT(mp, &vp)) 568 panic("cannot find root vnode"); 569 if (mp->mnt_ncmountpt.ncp == NULL) { 570 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 571 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 572 } 573 p->p_fd->fd_cdir = vp; 574 vref(p->p_fd->fd_cdir); 575 p->p_fd->fd_rdir = vp; 576 vref(p->p_fd->fd_rdir); 577 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 578 vn_unlock(vp); /* leave ref intact */ 579 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 580 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 581 582 kprintf("Mounting devfs\n"); 583 vfs_mountroot_devfs(); 584 585 /* 586 * Need just enough stack to hold the faked-up "execve()" arguments. 587 */ 588 addr = trunc_page(USRSTACK - PAGE_SIZE); 589 error = vm_map_find(&p->p_vmspace->vm_map, NULL, NULL, 590 0, &addr, PAGE_SIZE, 591 PAGE_SIZE, 592 FALSE, VM_MAPTYPE_NORMAL, 593 VM_PROT_ALL, VM_PROT_ALL, 0); 594 if (error) 595 panic("init: couldn't allocate argument space"); 596 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 597 p->p_vmspace->vm_ssize = 1; 598 599 if ((var = kgetenv("init_path")) != NULL) { 600 strncpy(init_path, var, sizeof init_path); 601 init_path[sizeof init_path - 1] = 0; 602 } 603 604 for (path = init_path; *path != '\0'; path = next) { 605 while (*path == ':') 606 path++; 607 if (*path == '\0') 608 break; 609 for (next = path; *next != '\0' && *next != ':'; next++) 610 /* nothing */ ; 611 if (bootverbose) 612 kprintf("start_init: trying %.*s\n", (int)(next - path), 613 path); 614 615 /* 616 * Move out the boot flag argument. 617 */ 618 options = 0; 619 ucp = (char *)USRSTACK; 620 (void)subyte(--ucp, 0); /* trailing zero */ 621 if (boothowto & RB_SINGLE) { 622 (void)subyte(--ucp, 's'); 623 options = 1; 624 } 625 #ifdef notyet 626 if (boothowto & RB_FASTBOOT) { 627 (void)subyte(--ucp, 'f'); 628 options = 1; 629 } 630 #endif 631 632 #ifdef BOOTCDROM 633 (void)subyte(--ucp, 'C'); 634 options = 1; 635 #endif 636 if (options == 0) 637 (void)subyte(--ucp, '-'); 638 (void)subyte(--ucp, '-'); /* leading hyphen */ 639 arg1 = ucp; 640 641 /* 642 * Move out the file name (also arg 0). 643 */ 644 (void)subyte(--ucp, 0); 645 for (s = next - 1; s >= path; s--) 646 (void)subyte(--ucp, *s); 647 arg0 = ucp; 648 649 /* 650 * Move out the arg pointers. 651 */ 652 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 653 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 654 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 655 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 656 657 /* 658 * Point at the arguments. 659 */ 660 args.fname = arg0; 661 args.argv = uap; 662 args.envv = NULL; 663 664 /* 665 * Now try to exec the program. If can't for any reason 666 * other than it doesn't exist, complain. 667 * 668 * Otherwise, return via fork_trampoline() all the way 669 * to user mode as init! 670 * 671 * WARNING! We may have been moved to another cpu after 672 * acquiring the current user process designation. The 673 * MP lock will migrate with us though so we still have to 674 * release it. 675 */ 676 if ((error = sys_execve(&args)) == 0) { 677 rel_mplock(); 678 lp->lwp_proc->p_usched->acquire_curproc(lp); 679 return; 680 } 681 if (error != ENOENT) 682 kprintf("exec %.*s: error %d\n", (int)(next - path), 683 path, error); 684 } 685 kprintf("init: not found in path %s\n", init_path); 686 panic("no init"); 687 } 688 689 /* 690 * Like kthread_create(), but runs in it's own address space. 691 * We do this early to reserve pid 1. 692 * 693 * Note special case - do not make it runnable yet. Other work 694 * in progress will change this more. 695 */ 696 static void 697 create_init(const void *udata __unused) 698 { 699 int error; 700 struct lwp *lp; 701 702 crit_enter(); 703 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 704 if (error) 705 panic("cannot fork init: %d", error); 706 initproc->p_flags |= P_SYSTEM; 707 reaper_init(initproc, &initreaper); 708 lp = ONLY_LWP_IN_PROC(initproc); 709 cpu_set_fork_handler(lp, start_init, NULL); 710 crit_exit(); 711 } 712 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 713 714 /* 715 * Make it runnable now. 716 */ 717 static void 718 kick_init(const void *udata __unused) 719 { 720 start_forked_proc(&lwp0, initproc); 721 } 722 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL); 723 724 static void 725 kpmap_init(const void *udata __unused) 726 { 727 kpmap = kmalloc(roundup2(sizeof(*kpmap), PAGE_SIZE), 728 M_TEMP, M_ZERO | M_WAITOK); 729 730 kpmap->header[0].type = UKPTYPE_VERSION; 731 kpmap->header[0].offset = offsetof(struct sys_kpmap, version); 732 kpmap->header[1].type = KPTYPE_UPTICKS; 733 kpmap->header[1].offset = offsetof(struct sys_kpmap, upticks); 734 kpmap->header[2].type = KPTYPE_TS_UPTIME; 735 kpmap->header[2].offset = offsetof(struct sys_kpmap, ts_uptime); 736 kpmap->header[3].type = KPTYPE_TS_REALTIME; 737 kpmap->header[3].offset = offsetof(struct sys_kpmap, ts_realtime); 738 kpmap->header[4].type = KPTYPE_TSC_FREQ; 739 kpmap->header[4].offset = offsetof(struct sys_kpmap, tsc_freq); 740 kpmap->header[5].type = KPTYPE_TICK_FREQ; 741 kpmap->header[5].offset = offsetof(struct sys_kpmap, tick_freq); 742 kpmap->version = KPMAP_VERSION; 743 } 744 SYSINIT(kpmapinit, SI_BOOT1_POST, SI_ORDER_FIRST, kpmap_init, NULL); 745 746 /* 747 * Machine independant globaldata initialization 748 * 749 * WARNING! Called from early boot, 'mycpu' may not work yet. 750 */ 751 void 752 mi_gdinit(struct globaldata *gd, int cpuid) 753 { 754 TAILQ_INIT(&gd->gd_systimerq); 755 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */ 756 gd->gd_cpuid = cpuid; 757 CPUMASK_ASSBIT(gd->gd_cpumask, cpuid); 758 gd->gd_cpumask_simple = CPUMASK_SIMPLE(cpuid); 759 gd->gd_cpumask_offset = (uintptr_t)CPUMASK_ADDR(*(cpumask_t *)0, cpuid); 760 lwkt_gdinit(gd); 761 vm_map_entry_reserve_cpu_init(gd); 762 sleep_gdinit(gd); 763 slab_gdinit(gd); 764 ATOMIC_CPUMASK_ORBIT(usched_global_cpumask, cpuid); 765 } 766 767