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/syscall.h> 53 #include <sys/systm.h> 54 #include <sys/vnode.h> 55 #include <sys/reboot.h> 56 #include <sys/sysmsg.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 static struct sysreaper initreaper; 87 struct proc *initproc; 88 struct proc proc0; 89 struct lwp lwp0; 90 struct thread thread0; 91 struct sys_kpmap *kpmap; 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 static struct sysinit **sysinit, **sysinit_end; 118 static 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 TAILQ_INIT(&lwp0.lwp_lpmap_backing_list); 178 spin_init(&lwp0.lwp_spin, "iproc_lwp0"); 179 varsymset_init(&proc0.p_varsymset, NULL); 180 thread0.td_flags |= TDF_RUNNING; 181 thread0.td_proc = &proc0; 182 thread0.td_lwp = &lwp0; 183 thread0.td_switch = cpu_lwkt_switch; 184 lwkt_schedule_self(curthread); 185 } 186 187 /* 188 * System startup; initialize the world, create process 0, mount root 189 * filesystem, and fork to create init and pagedaemon. Most of the 190 * hard work is done in the lower-level initialization routines including 191 * startup(), which does memory initialization and autoconfiguration. 192 * 193 * This allows simple addition of new kernel subsystems that require 194 * boot time initialization. It also allows substitution of subsystem 195 * (for instance, a scheduler, kernel profiler, or VM system) by object 196 * module. Finally, it allows for optional "kernel threads". 197 */ 198 void 199 mi_startup(void) 200 { 201 struct sysinit *sip; /* system initialization*/ 202 struct sysinit **sipp; /* system initialization*/ 203 struct sysinit **xipp; /* interior loop of sort*/ 204 struct sysinit *save; /* bubble*/ 205 206 if (sysinit == NULL) { 207 sysinit = SET_BEGIN(sysinit_set); 208 #if defined(__x86_64__) && defined(_KERNEL_VIRTUAL) 209 /* 210 * XXX For whatever reason, on 64-bit vkernels 211 * the value of sysinit obtained from the 212 * linker set is wrong. 213 */ 214 if ((long)sysinit % 8 != 0) { 215 kprintf("Fixing sysinit value...\n"); 216 sysinit = (void *)((long)(intptr_t)sysinit + 4); 217 } 218 #endif 219 sysinit_end = SET_LIMIT(sysinit_set); 220 } 221 #if defined(__x86_64__) && defined(_KERNEL_VIRTUAL) 222 KKASSERT((long)sysinit % 8 == 0); 223 #endif 224 225 restart: 226 /* 227 * Perform a bubble sort of the system initialization objects by 228 * their subsystem (primary key) and order (secondary key). 229 */ 230 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 231 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 232 if ((*sipp)->subsystem < (*xipp)->subsystem || 233 ((*sipp)->subsystem == (*xipp)->subsystem && 234 (*sipp)->order <= (*xipp)->order)) 235 continue; /* skip*/ 236 save = *sipp; 237 *sipp = *xipp; 238 *xipp = save; 239 } 240 } 241 242 /* 243 * Traverse the (now) ordered list of system initialization tasks. 244 * Perform each task, and continue on to the next task. 245 * 246 * The last item on the list is expected to be the scheduler, 247 * which will not return. 248 */ 249 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 250 sip = *sipp; 251 if (sip->subsystem == SI_SPECIAL_DUMMY) 252 continue; /* skip dummy task(s)*/ 253 254 if (sip->subsystem == SI_SPECIAL_DONE) 255 continue; 256 257 #if 0 258 if (bootverbose) 259 kprintf("(%08x-%p)\n", sip->subsystem, sip->func); 260 #endif 261 262 /* Call function */ 263 (*(sip->func))(sip->udata); 264 265 /* Check off the one we're just done */ 266 sip->subsystem = SI_SPECIAL_DONE; 267 268 /* Check if we've installed more sysinit items via KLD */ 269 if (newsysinit != NULL) { 270 if (sysinit != SET_BEGIN(sysinit_set)) 271 kfree(sysinit, M_TEMP); 272 sysinit = newsysinit; 273 sysinit_end = newsysinit_end; 274 newsysinit = NULL; 275 newsysinit_end = NULL; 276 goto restart; 277 } 278 } 279 280 panic("Shouldn't get here!"); 281 /* NOTREACHED*/ 282 } 283 284 285 /* 286 *************************************************************************** 287 **** 288 **** The following SYSINIT's belong elsewhere, but have not yet 289 **** been moved. 290 **** 291 *************************************************************************** 292 */ 293 static void 294 print_caddr_t(void *data) 295 { 296 kprintf("%s", (char *)data); 297 } 298 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright); 299 300 /* 301 * Leave the critical section that protected us from spurious interrupts 302 * so device probes work. 303 */ 304 static void 305 leavecrit(void *dummy __unused) 306 { 307 MachIntrABI.stabilize(); 308 cpu_enable_intr(); 309 MachIntrABI.cleanup(); 310 crit_exit(); 311 KKASSERT(!IN_CRITICAL_SECT(curthread)); 312 313 if (bootverbose) 314 kprintf("Leaving critical section, allowing interrupts\n"); 315 } 316 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL); 317 318 /* 319 * This is called after the threading system is up and running, 320 * including the softclock, clock interrupts, and SMP. 321 */ 322 static void 323 tsleepworks(void *dummy __unused) 324 { 325 tsleep_now_works = 1; 326 } 327 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL); 328 329 /* 330 * This is called after devices have configured. Tell the kernel we are 331 * no longer in cold boot. 332 */ 333 static void 334 endofcoldboot(void *dummy __unused) 335 { 336 cold = 0; 337 } 338 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL); 339 340 struct sysentvec null_sysvec = { 341 .sv_size = SYS_MAXSYSCALL, 342 .sv_table = sysent, 343 .sv_sigsize = 0, 344 .sv_sigtbl = NULL, 345 .sv_errsize = 0, 346 .sv_errtbl = NULL, 347 .sv_transtrap = NULL, 348 .sv_fixup = NULL, 349 .sv_sendsig = sendsig, 350 .sv_sigcode = sigcode, 351 .sv_szsigcode = &szsigcode, 352 .sv_name = "null", 353 .sv_coredump = NULL, 354 .sv_imgact_try = NULL, 355 .sv_minsigstksz = MINSIGSTKSZ 356 }; 357 358 /* 359 *************************************************************************** 360 **** 361 **** The two following SYSINT's are proc0 specific glue code. I am not 362 **** convinced that they can not be safely combined, but their order of 363 **** operation has been maintained as the same as the original init_main.c 364 **** for right now. 365 **** 366 **** These probably belong in init_proc.c or kern_proc.c, since they 367 **** deal with proc0 (the fork template process). 368 **** 369 *************************************************************************** 370 */ 371 /* ARGSUSED*/ 372 static void 373 proc0_init(void *dummy __unused) 374 { 375 struct proc *p; 376 struct lwp *lp; 377 struct uidinfo *uip; 378 379 p = &proc0; 380 lp = &lwp0; 381 382 /* 383 * Initialize osrel 384 */ 385 p->p_osrel = osreldate; 386 387 /* 388 * Initialize process and pgrp structures. 389 */ 390 procinit(); 391 392 /* 393 * additional VM structures 394 */ 395 vm_init2(); 396 397 /* 398 * Create process 0 (the swapper). 399 */ 400 procinsertinit(p); 401 pgrpinsertinit(&pgrp0); 402 LIST_INIT(&pgrp0.pg_members); 403 lwkt_token_init(&pgrp0.pg_token, "pgrp0"); 404 refcount_init(&pgrp0.pg_refs, 1); 405 lockinit(&pgrp0.pg_lock, "pgwt0", 0, 0); 406 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 407 408 pgrp0.pg_session = &session0; 409 session0.s_count = 1; 410 session0.s_leader = p; 411 sessinsertinit(&session0); 412 413 pgref(&pgrp0); 414 p->p_pgrp = &pgrp0; 415 416 p->p_sysent = &null_sysvec; 417 418 p->p_flags = P_SYSTEM; 419 p->p_stat = SACTIVE; 420 lp->lwp_stat = LSRUN; 421 p->p_nice = NZERO; 422 p->p_rtprio.type = RTP_PRIO_NORMAL; 423 p->p_rtprio.prio = 0; 424 lp->lwp_rtprio = p->p_rtprio; 425 426 p->p_peers = NULL; 427 p->p_leader = p; 428 429 bcopy("swapper", p->p_comm, sizeof ("swapper")); 430 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 431 432 /* Create credentials. */ 433 uip = uicreate(0); /* for cr_ruidinfo */ 434 uihold(uip); /* for cr_uidinfo */ 435 p->p_ucred = crget(); 436 p->p_ucred->cr_ruidinfo = uip; 437 p->p_ucred->cr_uidinfo = uip; 438 p->p_ucred->cr_ngroups = 1; /* group 0 */ 439 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 440 441 /* Don't jail it */ 442 p->p_ucred->cr_prison = NULL; 443 444 /* Create sigacts. */ 445 p->p_sigacts = &sigacts0; 446 refcount_init(&p->p_sigacts->ps_refcnt, 1); 447 448 /* Initialize signal state for process 0. */ 449 siginit(p); 450 451 /* Create the file descriptor table. */ 452 fdinit_bootstrap(p, &filedesc0, cmask); 453 454 /* Create the limits structures. */ 455 plimit_init0(&limit0); 456 p->p_limit = &limit0; 457 458 /* Allocate a prototype map so we have something to fork. */ 459 pmap_pinit0(vmspace_pmap(&vmspace0)); 460 p->p_vmspace = &vmspace0; 461 lp->lwp_vmspace = p->p_vmspace; 462 vmspace_initrefs(&vmspace0); 463 vm_map_init(&vmspace0.vm_map, 464 round_page(VM_MIN_USER_ADDRESS), 465 trunc_page(VM_MAX_USER_ADDRESS), 466 vmspace_pmap(&vmspace0)); 467 468 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 469 470 /* 471 * Charge root for one process. 472 */ 473 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 474 vm_init_limits(p); 475 } 476 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL); 477 478 static int proc0_post_callback(struct proc *p, void *data __unused); 479 480 /* ARGSUSED*/ 481 static void 482 proc0_post(void *dummy __unused) 483 { 484 struct timespec ts; 485 486 /* 487 * Now we can look at the time, having had a chance to verify the 488 * time from the file system. Pretend that proc0 started now. 489 */ 490 allproc_scan(proc0_post_callback, NULL, 0); 491 492 /* 493 * Give the ``random'' number generator a thump. 494 * XXX: Does read_random() contain enough bits to be used here ? 495 */ 496 nanotime(&ts); 497 skrandom(ts.tv_sec ^ ts.tv_nsec); 498 } 499 500 static int 501 proc0_post_callback(struct proc *p, void *data __unused) 502 { 503 microtime(&p->p_start); 504 return(0); 505 } 506 507 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL); 508 509 /* 510 *************************************************************************** 511 **** 512 **** The following SYSINIT's and glue code should be moved to the 513 **** respective files on a per subsystem basis. 514 **** 515 *************************************************************************** 516 */ 517 518 519 /* 520 *************************************************************************** 521 **** 522 **** The following code probably belongs in another file, like 523 **** kern/init_init.c. 524 **** 525 *************************************************************************** 526 */ 527 528 /* 529 * List of paths to try when searching for "init". 530 */ 531 static char init_path[MAXPATHLEN] = 532 #ifdef INIT_PATH 533 __XSTRING(INIT_PATH); 534 #else 535 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 536 #endif 537 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 538 539 /* 540 * Shutdown timeout of init(8). 541 * Unused within kernel, but used to control init(8), hence do not remove. 542 */ 543 #ifndef INIT_SHUTDOWN_TIMEOUT 544 #define INIT_SHUTDOWN_TIMEOUT 120 545 #endif 546 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 547 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 548 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 549 "Unused within kernel, but used to control init(8)"); 550 551 /* 552 * Start the initial user process; try exec'ing each pathname in init_path. 553 * The program is invoked with one argument containing the boot flags. 554 */ 555 static void 556 start_init(void *dummy, struct trapframe *frame) 557 { 558 vm_offset_t addr; 559 struct sysmsg sysmsg; 560 struct execve_args args; 561 int options, error; 562 char *var, *path, *next, *s; 563 char *ucp, **uap, *arg0, *arg1; 564 struct proc *p; 565 struct lwp *lp; 566 struct mount *mp; 567 struct vnode *vp; 568 char *env; 569 570 /* 571 * This is passed in by the bootloader 572 */ 573 env = kgetenv("kernelname"); 574 if (env != NULL) 575 strlcpy(kernelname, env, sizeof(kernelname)); 576 577 p = curproc; 578 579 lp = ONLY_LWP_IN_PROC(p); 580 581 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 582 mp = mountlist_boot_getfirst(); 583 if (VFS_ROOT(mp, &vp)) 584 panic("cannot find root vnode"); 585 if (mp->mnt_ncmountpt.ncp == NULL) { 586 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 587 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 588 } 589 p->p_fd->fd_cdir = vp; 590 vref(p->p_fd->fd_cdir); 591 p->p_fd->fd_rdir = vp; 592 vref(p->p_fd->fd_rdir); 593 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 594 vn_unlock(vp); /* leave ref intact */ 595 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 596 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 597 598 kprintf("Mounting devfs\n"); 599 vfs_mountroot_devfs(); 600 601 /* 602 * Need just enough stack to hold the faked-up "execve()" arguments. 603 */ 604 addr = trunc_page(USRSTACK - PAGE_SIZE); 605 error = vm_map_find(&p->p_vmspace->vm_map, NULL, NULL, 606 0, &addr, PAGE_SIZE, 607 PAGE_SIZE, FALSE, 608 VM_MAPTYPE_NORMAL, VM_SUBSYS_INIT, 609 VM_PROT_ALL, VM_PROT_ALL, 0); 610 if (error) 611 panic("init: couldn't allocate argument space"); 612 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 613 p->p_vmspace->vm_ssize = PAGE_SIZE; 614 615 if ((var = kgetenv("init_path")) != NULL) { 616 strncpy(init_path, var, sizeof init_path); 617 init_path[sizeof init_path - 1] = 0; 618 } 619 620 for (path = init_path; *path != '\0'; path = next) { 621 while (*path == ':') 622 path++; 623 if (*path == '\0') 624 break; 625 for (next = path; *next != '\0' && *next != ':'; next++) 626 /* nothing */ ; 627 if (bootverbose) 628 kprintf("start_init: trying %.*s\n", (int)(next - path), 629 path); 630 631 /* 632 * Move out the boot flag argument. 633 */ 634 options = 0; 635 ucp = (char *)USRSTACK; 636 (void)subyte(--ucp, 0); /* trailing zero */ 637 if (boothowto & RB_SINGLE) { 638 (void)subyte(--ucp, 's'); 639 options = 1; 640 } 641 #ifdef notyet 642 if (boothowto & RB_FASTBOOT) { 643 (void)subyte(--ucp, 'f'); 644 options = 1; 645 } 646 #endif 647 648 #ifdef BOOTCDROM 649 (void)subyte(--ucp, 'C'); 650 options = 1; 651 #endif 652 if (options == 0) 653 (void)subyte(--ucp, '-'); 654 (void)subyte(--ucp, '-'); /* leading hyphen */ 655 arg1 = ucp; 656 657 /* 658 * Move out the file name (also arg 0). 659 */ 660 (void)subyte(--ucp, 0); 661 for (s = next - 1; s >= path; s--) 662 (void)subyte(--ucp, *s); 663 arg0 = ucp; 664 665 /* 666 * Move out the arg pointers. 667 */ 668 uap = (char **)(rounddown2((intptr_t)ucp, sizeof(intptr_t))); 669 670 /* terminator */ 671 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)0); 672 673 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)(intptr_t)arg1); 674 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)(intptr_t)arg0); 675 676 /* 677 * Point at the arguments. 678 */ 679 bzero(&sysmsg, sizeof(sysmsg)); 680 args.fname = arg0; 681 args.argv = uap; 682 args.envv = NULL; 683 684 /* 685 * Now try to exec the program. If can't for any reason 686 * other than it doesn't exist, complain. 687 * 688 * Otherwise, return via fork_trampoline() all the way 689 * to user mode as init! 690 * 691 * WARNING! We may have been moved to another cpu after 692 * acquiring the current user process designation. The 693 * MP lock will migrate with us though so we still have to 694 * release it. 695 */ 696 if ((error = sys_execve(&sysmsg, &args)) == 0) { 697 lp->lwp_proc->p_usched->acquire_curproc(lp); 698 return; 699 } 700 if (error != ENOENT) 701 kprintf("exec %.*s: error %d\n", (int)(next - path), 702 path, error); 703 } 704 kprintf("init: not found in path %s\n", init_path); 705 panic("no init"); 706 } 707 708 /* 709 * Like kthread_create(), but runs in it's own address space. 710 * We do this early to reserve pid 1. 711 * 712 * Note special case - do not make it runnable yet. Other work 713 * in progress will change this more. 714 */ 715 static void 716 create_init(const void *udata __unused) 717 { 718 int error; 719 struct lwp *lp; 720 721 crit_enter(); 722 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 723 if (error) 724 panic("cannot fork init: %d", error); 725 initproc->p_flags |= P_SYSTEM; 726 reaper_init(initproc, &initreaper); 727 lp = ONLY_LWP_IN_PROC(initproc); 728 cpu_set_fork_handler(lp, start_init, NULL); 729 crit_exit(); 730 } 731 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 732 733 /* 734 * Make it runnable now. 735 */ 736 static void 737 kick_init(const void *udata __unused) 738 { 739 start_forked_proc(&lwp0, initproc); 740 } 741 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL); 742 743 static void 744 kpmap_init(const void *udata __unused) 745 { 746 kpmap = kmalloc(roundup2(sizeof(*kpmap), PAGE_SIZE), 747 M_TEMP, M_ZERO | M_WAITOK); 748 749 kpmap->header[0].type = UKPTYPE_VERSION; 750 kpmap->header[0].offset = offsetof(struct sys_kpmap, version); 751 kpmap->header[1].type = KPTYPE_UPTICKS; 752 kpmap->header[1].offset = offsetof(struct sys_kpmap, upticks); 753 kpmap->header[2].type = KPTYPE_TS_UPTIME; 754 kpmap->header[2].offset = offsetof(struct sys_kpmap, ts_uptime); 755 kpmap->header[3].type = KPTYPE_TS_REALTIME; 756 kpmap->header[3].offset = offsetof(struct sys_kpmap, ts_realtime); 757 kpmap->header[4].type = KPTYPE_TSC_FREQ; 758 kpmap->header[4].offset = offsetof(struct sys_kpmap, tsc_freq); 759 kpmap->header[5].type = KPTYPE_TICK_FREQ; 760 kpmap->header[5].offset = offsetof(struct sys_kpmap, tick_freq); 761 kpmap->header[6].type = KPTYPE_FAST_GTOD; 762 kpmap->header[6].offset = offsetof(struct sys_kpmap, fast_gtod); 763 kpmap->version = KPMAP_VERSION; 764 } 765 SYSINIT(kpmapinit, SI_BOOT1_POST, SI_ORDER_FIRST, kpmap_init, NULL); 766 767 /* 768 * Machine independant globaldata initialization 769 * 770 * WARNING! Called from early boot, 'mycpu' may not work yet. 771 */ 772 void 773 mi_gdinit(struct globaldata *gd, int cpuid) 774 { 775 TAILQ_INIT(&gd->gd_systimerq); 776 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */ 777 gd->gd_cpuid = cpuid; 778 CPUMASK_ASSBIT(gd->gd_cpumask, cpuid); 779 gd->gd_cpumask_simple = CPUMASK_SIMPLE(cpuid); 780 gd->gd_cpumask_offset = (uintptr_t)CPUMASK_ADDR(*(cpumask_t *)0, cpuid); 781 lwkt_gdinit(gd); 782 vm_map_entry_reserve_cpu_init(gd); 783 if (gd->gd_cpuid == 0) 784 sleep_early_gdinit(gd); 785 else 786 sleep_gdinit(gd); 787 slab_gdinit(gd); 788 ATOMIC_CPUMASK_ORBIT(usched_global_cpumask, cpuid); 789 gd->gd_vmstats = vmstats; 790 } 791 792