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/spinlock2.h> 66 67 #include <machine/cpu.h> 68 69 #include <vm/vm.h> 70 #include <vm/vm_param.h> 71 #include <sys/lock.h> 72 #include <vm/pmap.h> 73 #include <vm/vm_map.h> 74 #include <vm/vm_extern.h> 75 #include <sys/copyright.h> 76 77 int vfs_mountroot_devfs(void); 78 79 /* Components of the first process -- never freed. */ 80 static struct session session0; 81 static struct pgrp pgrp0; 82 static struct sigacts sigacts0; 83 static struct filedesc filedesc0; 84 static struct plimit limit0; 85 static struct vmspace vmspace0; 86 struct proc *initproc; 87 struct proc proc0; 88 struct lwp lwp0; 89 struct thread thread0; 90 struct sys_kpmap *kpmap; 91 struct sysreaper initreaper; 92 93 int cmask = CMASK; 94 u_int cpu_mi_feature; 95 cpumask_t usched_global_cpumask; 96 extern struct user *proc0paddr; 97 98 int boothowto = 0; /* initialized so that it can be patched */ 99 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 100 "Reboot flags, from console subsystem"); 101 SYSCTL_OPAQUE(_kern, OID_AUTO, usched_global_cpumask, CTLFLAG_RW, 102 &usched_global_cpumask, sizeof(usched_global_cpumask), "LU", 103 "global user scheduler cpumask"); 104 105 /* 106 * This ensures that there is at least one entry so that the sysinit_set 107 * symbol is not undefined. A subsystem ID of SI_SPECIAL_DUMMY is never 108 * executed. 109 */ 110 SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL); 111 112 /* 113 * The sysinit table itself. Items are checked off as the are run. 114 * If we want to register new sysinit types, add them to newsysinit. 115 */ 116 SET_DECLARE(sysinit_set, struct sysinit); 117 struct sysinit **sysinit, **sysinit_end; 118 struct sysinit **newsysinit, **newsysinit_end; 119 120 121 /* 122 * Merge a new sysinit set into the current set, reallocating it if 123 * necessary. This can only be called after malloc is running. 124 */ 125 void 126 sysinit_add(struct sysinit **set, struct sysinit **set_end) 127 { 128 struct sysinit **newset; 129 struct sysinit **sipp; 130 struct sysinit **xipp; 131 int count; 132 133 count = set_end - set; 134 if (newsysinit) 135 count += newsysinit_end - newsysinit; 136 else 137 count += sysinit_end - sysinit; 138 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK); 139 xipp = newset; 140 if (newsysinit) { 141 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 142 *xipp++ = *sipp; 143 } else { 144 for (sipp = sysinit; sipp < sysinit_end; sipp++) 145 *xipp++ = *sipp; 146 } 147 for (sipp = set; sipp < set_end; sipp++) 148 *xipp++ = *sipp; 149 if (newsysinit) 150 kfree(newsysinit, M_TEMP); 151 newsysinit = newset; 152 newsysinit_end = newset + count; 153 } 154 155 /* 156 * Callbacks from machine-dependant startup code (e.g. init386) to set 157 * up low level entities related to cpu #0's globaldata. 158 * 159 * Called from very low level boot code. 160 */ 161 void 162 mi_proc0init(struct globaldata *gd, struct user *proc0paddr) 163 { 164 lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd); 165 lwkt_set_comm(&thread0, "thread0"); 166 RB_INIT(&proc0.p_lwp_tree); 167 spin_init(&proc0.p_spin, "iproc_proc0"); 168 lwkt_token_init(&proc0.p_token, "iproc"); 169 lwp0.lwp_tid = 1; 170 proc0.p_lasttid = lwp0.lwp_tid; /* +1 = next TID */ 171 lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0); 172 lwp0.lwp_thread = &thread0; 173 lwp0.lwp_proc = &proc0; 174 proc0.p_usched = usched_init(); 175 CPUMASK_ASSALLONES(lwp0.lwp_cpumask); 176 lwkt_token_init(&lwp0.lwp_token, "lwp_token"); 177 spin_init(&lwp0.lwp_spin, "iproc_lwp0"); 178 varsymset_init(&proc0.p_varsymset, NULL); 179 thread0.td_flags |= TDF_RUNNING; 180 thread0.td_proc = &proc0; 181 thread0.td_lwp = &lwp0; 182 thread0.td_switch = cpu_lwkt_switch; 183 lwkt_schedule_self(curthread); 184 } 185 186 /* 187 * System startup; initialize the world, create process 0, mount root 188 * filesystem, and fork to create init and pagedaemon. Most of the 189 * hard work is done in the lower-level initialization routines including 190 * startup(), which does memory initialization and autoconfiguration. 191 * 192 * This allows simple addition of new kernel subsystems that require 193 * boot time initialization. It also allows substitution of subsystem 194 * (for instance, a scheduler, kernel profiler, or VM system) by object 195 * module. Finally, it allows for optional "kernel threads". 196 */ 197 void 198 mi_startup(void) 199 { 200 struct sysinit *sip; /* system initialization*/ 201 struct sysinit **sipp; /* system initialization*/ 202 struct sysinit **xipp; /* interior loop of sort*/ 203 struct sysinit *save; /* bubble*/ 204 205 if (sysinit == NULL) { 206 sysinit = SET_BEGIN(sysinit_set); 207 #if defined(__x86_64__) && defined(_KERNEL_VIRTUAL) 208 /* 209 * XXX For whatever reason, on 64-bit vkernels 210 * the value of sysinit obtained from the 211 * linker set is wrong. 212 */ 213 if ((long)sysinit % 8 != 0) { 214 kprintf("Fixing sysinit value...\n"); 215 sysinit = (void *)((long)(intptr_t)sysinit + 4); 216 } 217 #endif 218 sysinit_end = SET_LIMIT(sysinit_set); 219 } 220 #if defined(__x86_64__) && defined(_KERNEL_VIRTUAL) 221 KKASSERT((long)sysinit % 8 == 0); 222 #endif 223 224 restart: 225 /* 226 * Perform a bubble sort of the system initialization objects by 227 * their subsystem (primary key) and order (secondary key). 228 */ 229 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 230 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 231 if ((*sipp)->subsystem < (*xipp)->subsystem || 232 ((*sipp)->subsystem == (*xipp)->subsystem && 233 (*sipp)->order <= (*xipp)->order)) 234 continue; /* skip*/ 235 save = *sipp; 236 *sipp = *xipp; 237 *xipp = save; 238 } 239 } 240 241 /* 242 * Traverse the (now) ordered list of system initialization tasks. 243 * Perform each task, and continue on to the next task. 244 * 245 * The last item on the list is expected to be the scheduler, 246 * which will not return. 247 */ 248 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 249 sip = *sipp; 250 if (sip->subsystem == SI_SPECIAL_DUMMY) 251 continue; /* skip dummy task(s)*/ 252 253 if (sip->subsystem == SI_SPECIAL_DONE) 254 continue; 255 256 #if 0 257 if (bootverbose) 258 kprintf("(%08x-%p)\n", sip->subsystem, sip->func); 259 #endif 260 261 /* Call function */ 262 (*(sip->func))(sip->udata); 263 264 /* Check off the one we're just done */ 265 sip->subsystem = SI_SPECIAL_DONE; 266 267 /* Check if we've installed more sysinit items via KLD */ 268 if (newsysinit != NULL) { 269 if (sysinit != SET_BEGIN(sysinit_set)) 270 kfree(sysinit, M_TEMP); 271 sysinit = newsysinit; 272 sysinit_end = newsysinit_end; 273 newsysinit = NULL; 274 newsysinit_end = NULL; 275 goto restart; 276 } 277 } 278 279 panic("Shouldn't get here!"); 280 /* NOTREACHED*/ 281 } 282 283 284 /* 285 *************************************************************************** 286 **** 287 **** The following SYSINIT's belong elsewhere, but have not yet 288 **** been moved. 289 **** 290 *************************************************************************** 291 */ 292 static void 293 print_caddr_t(void *data) 294 { 295 kprintf("%s", (char *)data); 296 } 297 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright); 298 299 /* 300 * Leave the critical section that protected us from spurious interrupts 301 * so device probes work. 302 */ 303 static void 304 leavecrit(void *dummy __unused) 305 { 306 MachIntrABI.stabilize(); 307 cpu_enable_intr(); 308 MachIntrABI.cleanup(); 309 crit_exit(); 310 KKASSERT(!IN_CRITICAL_SECT(curthread)); 311 312 if (bootverbose) 313 kprintf("Leaving critical section, allowing interrupts\n"); 314 } 315 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL); 316 317 /* 318 * This is called after the threading system is up and running, 319 * including the softclock, clock interrupts, and SMP. 320 */ 321 static void 322 tsleepworks(void *dummy __unused) 323 { 324 tsleep_now_works = 1; 325 } 326 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL); 327 328 /* 329 * This is called after devices have configured. Tell the kernel we are 330 * no longer in cold boot. 331 */ 332 static void 333 endofcoldboot(void *dummy __unused) 334 { 335 cold = 0; 336 } 337 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL); 338 339 /* 340 *************************************************************************** 341 **** 342 **** The two following SYSINT's are proc0 specific glue code. I am not 343 **** convinced that they can not be safely combined, but their order of 344 **** operation has been maintained as the same as the original init_main.c 345 **** for right now. 346 **** 347 **** These probably belong in init_proc.c or kern_proc.c, since they 348 **** deal with proc0 (the fork template process). 349 **** 350 *************************************************************************** 351 */ 352 /* ARGSUSED*/ 353 static void 354 proc0_init(void *dummy __unused) 355 { 356 struct proc *p; 357 struct lwp *lp; 358 struct uidinfo *uip; 359 360 p = &proc0; 361 lp = &lwp0; 362 363 /* 364 * Initialize osrel 365 */ 366 p->p_osrel = osreldate; 367 368 /* 369 * Initialize process and pgrp structures. 370 */ 371 procinit(); 372 373 /* 374 * additional VM structures 375 */ 376 vm_init2(); 377 378 /* 379 * Create process 0 (the swapper). 380 */ 381 procinsertinit(p); 382 pgrpinsertinit(&pgrp0); 383 LIST_INIT(&pgrp0.pg_members); 384 lwkt_token_init(&pgrp0.pg_token, "pgrp0"); 385 refcount_init(&pgrp0.pg_refs, 1); 386 lockinit(&pgrp0.pg_lock, "pgwt0", 0, 0); 387 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 388 389 pgrp0.pg_session = &session0; 390 session0.s_count = 1; 391 session0.s_leader = p; 392 sessinsertinit(&session0); 393 394 pgref(&pgrp0); 395 p->p_pgrp = &pgrp0; 396 397 p->p_sysent = &aout_sysvec; 398 399 p->p_flags = P_SYSTEM; 400 p->p_stat = SACTIVE; 401 lp->lwp_stat = LSRUN; 402 p->p_nice = NZERO; 403 p->p_rtprio.type = RTP_PRIO_NORMAL; 404 p->p_rtprio.prio = 0; 405 lp->lwp_rtprio = p->p_rtprio; 406 407 p->p_peers = NULL; 408 p->p_leader = p; 409 410 bcopy("swapper", p->p_comm, sizeof ("swapper")); 411 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 412 413 /* Create credentials. */ 414 uip = uicreate(0); /* for cr_ruidinfo */ 415 uihold(uip); /* for cr_uidinfo */ 416 p->p_ucred = crget(); 417 p->p_ucred->cr_ruidinfo = uip; 418 p->p_ucred->cr_uidinfo = uip; 419 p->p_ucred->cr_ngroups = 1; /* group 0 */ 420 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 421 422 /* Don't jail it */ 423 p->p_ucred->cr_prison = NULL; 424 425 /* Create sigacts. */ 426 p->p_sigacts = &sigacts0; 427 refcount_init(&p->p_sigacts->ps_refcnt, 1); 428 429 /* Initialize signal state for process 0. */ 430 siginit(p); 431 432 /* Create the file descriptor table. */ 433 fdinit_bootstrap(p, &filedesc0, cmask); 434 435 /* Create the limits structures. */ 436 plimit_init0(&limit0); 437 p->p_limit = &limit0; 438 439 /* Allocate a prototype map so we have something to fork. */ 440 pmap_pinit0(vmspace_pmap(&vmspace0)); 441 p->p_vmspace = &vmspace0; 442 lp->lwp_vmspace = p->p_vmspace; 443 vmspace_initrefs(&vmspace0); 444 vm_map_init(&vmspace0.vm_map, 445 round_page(VM_MIN_USER_ADDRESS), 446 trunc_page(VM_MAX_USER_ADDRESS), 447 vmspace_pmap(&vmspace0)); 448 449 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 450 451 /* 452 * Charge root for one process. 453 */ 454 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 455 vm_init_limits(p); 456 } 457 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL); 458 459 static int proc0_post_callback(struct proc *p, void *data __unused); 460 461 /* ARGSUSED*/ 462 static void 463 proc0_post(void *dummy __unused) 464 { 465 struct timespec ts; 466 467 /* 468 * Now we can look at the time, having had a chance to verify the 469 * time from the file system. Pretend that proc0 started now. 470 */ 471 allproc_scan(proc0_post_callback, NULL, 0); 472 473 /* 474 * Give the ``random'' number generator a thump. 475 * XXX: Does read_random() contain enough bits to be used here ? 476 */ 477 nanotime(&ts); 478 skrandom(ts.tv_sec ^ ts.tv_nsec); 479 } 480 481 static int 482 proc0_post_callback(struct proc *p, void *data __unused) 483 { 484 microtime(&p->p_start); 485 return(0); 486 } 487 488 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL); 489 490 /* 491 *************************************************************************** 492 **** 493 **** The following SYSINIT's and glue code should be moved to the 494 **** respective files on a per subsystem basis. 495 **** 496 *************************************************************************** 497 */ 498 499 500 /* 501 *************************************************************************** 502 **** 503 **** The following code probably belongs in another file, like 504 **** kern/init_init.c. 505 **** 506 *************************************************************************** 507 */ 508 509 /* 510 * List of paths to try when searching for "init". 511 */ 512 static char init_path[MAXPATHLEN] = 513 #ifdef INIT_PATH 514 __XSTRING(INIT_PATH); 515 #else 516 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 517 #endif 518 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 519 520 /* 521 * Shutdown timeout of init(8). 522 * Unused within kernel, but used to control init(8), hence do not remove. 523 */ 524 #ifndef INIT_SHUTDOWN_TIMEOUT 525 #define INIT_SHUTDOWN_TIMEOUT 120 526 #endif 527 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 528 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 529 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 530 "Unused within kernel, but used to control init(8)"); 531 532 /* 533 * Start the initial user process; try exec'ing each pathname in init_path. 534 * The program is invoked with one argument containing the boot flags. 535 */ 536 static void 537 start_init(void *dummy, struct trapframe *frame) 538 { 539 vm_offset_t addr; 540 struct execve_args args; 541 int options, error; 542 char *var, *path, *next, *s; 543 char *ucp, **uap, *arg0, *arg1; 544 struct proc *p; 545 struct lwp *lp; 546 struct mount *mp; 547 struct vnode *vp; 548 char *env; 549 550 /* 551 * This is passed in by the bootloader 552 */ 553 env = kgetenv("kernelname"); 554 if (env != NULL) 555 strlcpy(kernelname, env, sizeof(kernelname)); 556 557 p = curproc; 558 559 lp = ONLY_LWP_IN_PROC(p); 560 561 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 562 mp = mountlist_boot_getfirst(); 563 if (VFS_ROOT(mp, &vp)) 564 panic("cannot find root vnode"); 565 if (mp->mnt_ncmountpt.ncp == NULL) { 566 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 567 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 568 } 569 p->p_fd->fd_cdir = vp; 570 vref(p->p_fd->fd_cdir); 571 p->p_fd->fd_rdir = vp; 572 vref(p->p_fd->fd_rdir); 573 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 574 vn_unlock(vp); /* leave ref intact */ 575 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 576 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 577 578 kprintf("Mounting devfs\n"); 579 vfs_mountroot_devfs(); 580 581 /* 582 * Need just enough stack to hold the faked-up "execve()" arguments. 583 */ 584 addr = trunc_page(USRSTACK - PAGE_SIZE); 585 error = vm_map_find(&p->p_vmspace->vm_map, NULL, NULL, 586 0, &addr, PAGE_SIZE, 587 PAGE_SIZE, FALSE, 588 VM_MAPTYPE_NORMAL, VM_SUBSYS_INIT, 589 VM_PROT_ALL, VM_PROT_ALL, 0); 590 if (error) 591 panic("init: couldn't allocate argument space"); 592 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 593 p->p_vmspace->vm_ssize = PAGE_SIZE; 594 595 if ((var = kgetenv("init_path")) != NULL) { 596 strncpy(init_path, var, sizeof init_path); 597 init_path[sizeof init_path - 1] = 0; 598 } 599 600 for (path = init_path; *path != '\0'; path = next) { 601 while (*path == ':') 602 path++; 603 if (*path == '\0') 604 break; 605 for (next = path; *next != '\0' && *next != ':'; next++) 606 /* nothing */ ; 607 if (bootverbose) 608 kprintf("start_init: trying %.*s\n", (int)(next - path), 609 path); 610 611 /* 612 * Move out the boot flag argument. 613 */ 614 options = 0; 615 ucp = (char *)USRSTACK; 616 (void)subyte(--ucp, 0); /* trailing zero */ 617 if (boothowto & RB_SINGLE) { 618 (void)subyte(--ucp, 's'); 619 options = 1; 620 } 621 #ifdef notyet 622 if (boothowto & RB_FASTBOOT) { 623 (void)subyte(--ucp, 'f'); 624 options = 1; 625 } 626 #endif 627 628 #ifdef BOOTCDROM 629 (void)subyte(--ucp, 'C'); 630 options = 1; 631 #endif 632 if (options == 0) 633 (void)subyte(--ucp, '-'); 634 (void)subyte(--ucp, '-'); /* leading hyphen */ 635 arg1 = ucp; 636 637 /* 638 * Move out the file name (also arg 0). 639 */ 640 (void)subyte(--ucp, 0); 641 for (s = next - 1; s >= path; s--) 642 (void)subyte(--ucp, *s); 643 arg0 = ucp; 644 645 /* 646 * Move out the arg pointers. 647 */ 648 uap = (char **)(rounddown2((intptr_t)ucp, sizeof(intptr_t))); 649 650 /* terminator */ 651 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)0); 652 653 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)(intptr_t)arg1); 654 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)(intptr_t)arg0); 655 656 /* 657 * Point at the arguments. 658 */ 659 args.fname = arg0; 660 args.argv = uap; 661 args.envv = NULL; 662 663 /* 664 * Now try to exec the program. If can't for any reason 665 * other than it doesn't exist, complain. 666 * 667 * Otherwise, return via fork_trampoline() all the way 668 * to user mode as init! 669 * 670 * WARNING! We may have been moved to another cpu after 671 * acquiring the current user process designation. The 672 * MP lock will migrate with us though so we still have to 673 * release it. 674 */ 675 if ((error = sys_execve(&args)) == 0) { 676 lp->lwp_proc->p_usched->acquire_curproc(lp); 677 return; 678 } 679 if (error != ENOENT) 680 kprintf("exec %.*s: error %d\n", (int)(next - path), 681 path, error); 682 } 683 kprintf("init: not found in path %s\n", init_path); 684 panic("no init"); 685 } 686 687 /* 688 * Like kthread_create(), but runs in it's own address space. 689 * We do this early to reserve pid 1. 690 * 691 * Note special case - do not make it runnable yet. Other work 692 * in progress will change this more. 693 */ 694 static void 695 create_init(const void *udata __unused) 696 { 697 int error; 698 struct lwp *lp; 699 700 crit_enter(); 701 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 702 if (error) 703 panic("cannot fork init: %d", error); 704 initproc->p_flags |= P_SYSTEM; 705 reaper_init(initproc, &initreaper); 706 lp = ONLY_LWP_IN_PROC(initproc); 707 cpu_set_fork_handler(lp, start_init, NULL); 708 crit_exit(); 709 } 710 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 711 712 /* 713 * Make it runnable now. 714 */ 715 static void 716 kick_init(const void *udata __unused) 717 { 718 start_forked_proc(&lwp0, initproc); 719 } 720 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL); 721 722 static void 723 kpmap_init(const void *udata __unused) 724 { 725 kpmap = kmalloc(roundup2(sizeof(*kpmap), PAGE_SIZE), 726 M_TEMP, M_ZERO | M_WAITOK); 727 728 kpmap->header[0].type = UKPTYPE_VERSION; 729 kpmap->header[0].offset = offsetof(struct sys_kpmap, version); 730 kpmap->header[1].type = KPTYPE_UPTICKS; 731 kpmap->header[1].offset = offsetof(struct sys_kpmap, upticks); 732 kpmap->header[2].type = KPTYPE_TS_UPTIME; 733 kpmap->header[2].offset = offsetof(struct sys_kpmap, ts_uptime); 734 kpmap->header[3].type = KPTYPE_TS_REALTIME; 735 kpmap->header[3].offset = offsetof(struct sys_kpmap, ts_realtime); 736 kpmap->header[4].type = KPTYPE_TSC_FREQ; 737 kpmap->header[4].offset = offsetof(struct sys_kpmap, tsc_freq); 738 kpmap->header[5].type = KPTYPE_TICK_FREQ; 739 kpmap->header[5].offset = offsetof(struct sys_kpmap, tick_freq); 740 kpmap->header[6].type = KPTYPE_FAST_GTOD; 741 kpmap->header[6].offset = offsetof(struct sys_kpmap, fast_gtod); 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 if (gd->gd_cpuid == 0) 763 sleep_early_gdinit(gd); 764 else 765 sleep_gdinit(gd); 766 slab_gdinit(gd); 767 ATOMIC_CPUMASK_ORBIT(usched_global_cpumask, cpuid); 768 gd->gd_vmstats = vmstats; 769 } 770 771