init_main.c revision 1.288
1 /* $NetBSD: init_main.c,v 1.288 2007/01/19 14:49:10 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 37 */ 38 39 /* 40 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: init_main.c,v 1.288 2007/01/19 14:49:10 hannken Exp $"); 75 76 #include "opt_ipsec.h" 77 #include "opt_kcont.h" 78 #include "opt_multiprocessor.h" 79 #include "opt_ntp.h" 80 #include "opt_pipe.h" 81 #include "opt_posix.h" 82 #include "opt_syscall_debug.h" 83 #include "opt_sysv.h" 84 #include "opt_pax.h" 85 86 #include "rnd.h" 87 #include "veriexec.h" 88 89 #include <sys/param.h> 90 #include <sys/acct.h> 91 #include <sys/filedesc.h> 92 #include <sys/file.h> 93 #include <sys/errno.h> 94 #include <sys/callout.h> 95 #include <sys/kernel.h> 96 #include <sys/kcont.h> 97 #include <sys/kmem.h> 98 #include <sys/mount.h> 99 #include <sys/proc.h> 100 #include <sys/kthread.h> 101 #include <sys/resourcevar.h> 102 #include <sys/signalvar.h> 103 #include <sys/systm.h> 104 #include <sys/vnode.h> 105 #include <sys/fstrans.h> 106 #include <sys/tty.h> 107 #include <sys/conf.h> 108 #include <sys/disklabel.h> 109 #include <sys/buf.h> 110 #include <sys/device.h> 111 #include <sys/exec.h> 112 #include <sys/socketvar.h> 113 #include <sys/protosw.h> 114 #include <sys/reboot.h> 115 #include <sys/user.h> 116 #include <sys/sysctl.h> 117 #include <sys/event.h> 118 #include <sys/mbuf.h> 119 #include <sys/iostat.h> 120 #ifdef FAST_IPSEC 121 #include <netipsec/ipsec.h> 122 #endif 123 #ifdef SYSVSHM 124 #include <sys/shm.h> 125 #endif 126 #ifdef SYSVSEM 127 #include <sys/sem.h> 128 #endif 129 #ifdef SYSVMSG 130 #include <sys/msg.h> 131 #endif 132 #ifdef P1003_1B_SEMAPHORE 133 #include <sys/ksem.h> 134 #endif 135 #include <sys/domain.h> 136 #include <sys/namei.h> 137 #if NRND > 0 138 #include <sys/rnd.h> 139 #endif 140 #ifndef PIPE_SOCKETPAIR 141 #include <sys/pipe.h> 142 #endif 143 #ifdef LKM 144 #include <sys/lkm.h> 145 #endif 146 #if NVERIEXEC > 0 147 #include <sys/verified_exec.h> 148 #endif /* NVERIEXEC > 0 */ 149 #include <sys/kauth.h> 150 #include <net80211/ieee80211_netbsd.h> 151 152 #include <sys/syscall.h> 153 #include <sys/sa.h> 154 #include <sys/syscallargs.h> 155 156 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 157 #include <sys/pax.h> 158 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 159 #include <ufs/ufs/quota.h> 160 161 #include <miscfs/genfs/genfs.h> 162 #include <miscfs/syncfs/syncfs.h> 163 164 #include <machine/cpu.h> 165 166 #include <uvm/uvm.h> 167 168 #include <dev/cons.h> 169 170 #include <net/if.h> 171 #include <net/raw_cb.h> 172 173 #include <secmodel/secmodel.h> 174 175 extern struct proc proc0; 176 extern struct lwp lwp0; 177 extern struct cwdinfo cwdi0; 178 179 #ifndef curlwp 180 struct lwp *curlwp = &lwp0; 181 #endif 182 struct proc *initproc; 183 184 struct vnode *rootvp, *swapdev_vp; 185 int boothowto; 186 int cold = 1; /* still working on startup */ 187 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 188 time_t rootfstime; /* recorded root fs time, if known */ 189 190 volatile int start_init_exec; /* semaphore for start_init() */ 191 192 static void check_console(struct lwp *l); 193 static void start_init(void *); 194 void main(void); 195 196 #if defined(__SSP__) || defined(__SSP_ALL__) 197 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 198 void __stack_chk_fail(void); 199 200 void 201 __stack_chk_fail(void) 202 { 203 panic("stack overflow detected; terminated"); 204 } 205 #endif 206 207 void __secmodel_none(void); 208 __weak_alias(secmodel_start, __secmodel_none); 209 void 210 __secmodel_none(void) 211 { 212 return; 213 } 214 215 /* 216 * System startup; initialize the world, create process 0, mount root 217 * filesystem, and fork to create init and pagedaemon. Most of the 218 * hard work is done in the lower-level initialization routines including 219 * startup(), which does memory initialization and autoconfiguration. 220 */ 221 void 222 main(void) 223 { 224 #ifdef __HAVE_TIMECOUNTER 225 struct timeval time; 226 #endif 227 struct lwp *l; 228 struct proc *p; 229 struct pdevinit *pdev; 230 int s, error; 231 extern struct pdevinit pdevinit[]; 232 extern void schedcpu(void *); 233 #ifdef NVNODE_IMPLICIT 234 int usevnodes; 235 #endif 236 237 /* 238 * Initialize the current LWP pointer (curlwp) before 239 * any possible traps/probes to simplify trap processing. 240 */ 241 l = &lwp0; 242 curlwp = l; 243 l->l_cpu = curcpu(); 244 l->l_proc = &proc0; 245 l->l_lid = 1; 246 247 /* 248 * Attempt to find console and initialize 249 * in case of early panic or other messages. 250 */ 251 consinit(); 252 253 KERNEL_LOCK_INIT(); 254 255 uvm_init(); 256 257 kmem_init(); 258 259 /* Do machine-dependent initialization. */ 260 cpu_startup(); 261 262 /* Initialize callouts. */ 263 callout_startup(); 264 265 /* Initialize the buffer cache */ 266 bufinit(); 267 268 /* 269 * Initialize mbuf's. Do this now because we might attempt to 270 * allocate mbufs or mbuf clusters during autoconfiguration. 271 */ 272 mbinit(); 273 274 /* Initialize sockets. */ 275 soinit(); 276 277 #ifdef KCONT 278 /* Initialize kcont. */ 279 kcont_init(); 280 #endif 281 282 /* 283 * The following things must be done before autoconfiguration. 284 */ 285 evcnt_init(); /* initialize event counters */ 286 #if NRND > 0 287 rnd_init(); /* initialize RNG */ 288 #endif 289 /* Initialize the sysctl subsystem. */ 290 sysctl_init(); 291 292 /* Initialize process and pgrp structures. */ 293 procinit(); 294 lwpinit(); 295 296 /* Initialize signal-related data structures. */ 297 signal_init(); 298 299 /* Create process 0 (the swapper). */ 300 proc0_init(); 301 302 /* 303 * Charge root for one process. 304 */ 305 (void)chgproccnt(0, 1); 306 307 rqinit(); 308 309 /* Initialize I/O statistics. */ 310 iostat_init(); 311 312 /* Initialize the file systems. */ 313 #ifdef NVNODE_IMPLICIT 314 /* 315 * If maximum number of vnodes in namei vnode cache is not explicitly 316 * defined in kernel config, adjust the number such as we use roughly 317 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 318 */ 319 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 320 if (usevnodes > desiredvnodes) 321 desiredvnodes = usevnodes; 322 #endif 323 vfsinit(); 324 325 /* Initialize fstrans. */ 326 fstrans_init(); 327 328 #ifdef __HAVE_TIMECOUNTER 329 inittimecounter(); 330 ntp_init(); 331 #endif /* __HAVE_TIMECOUNTER */ 332 333 /* Initialize kauth. */ 334 kauth_init(); 335 336 /* Configure the system hardware. This will enable interrupts. */ 337 configure(); 338 339 #if defined(__SSP__) || defined(__SSP_ALL__) 340 { 341 #ifdef DIAGNOSTIC 342 printf("Initializing SSP:"); 343 #endif 344 /* 345 * We initialize ssp here carefully: 346 * 1. after we got some entropy 347 * 2. without calling a function 348 */ 349 size_t i; 350 long guard[__arraycount(__stack_chk_guard)]; 351 352 arc4randbytes(guard, sizeof(guard)); 353 for (i = 0; i < __arraycount(guard); i++) 354 __stack_chk_guard[i] = guard[i]; 355 #ifdef DIAGNOSTIC 356 for (i = 0; i < __arraycount(guard); i++) 357 printf("%lx ", guard[i]); 358 printf("\n"); 359 #endif 360 } 361 #endif 362 ubc_init(); /* must be after autoconfig */ 363 364 /* Lock the kernel on behalf of proc0. */ 365 KERNEL_PROC_LOCK(l); 366 367 #ifdef SYSVSHM 368 /* Initialize System V style shared memory. */ 369 shminit(); 370 #endif 371 372 #ifdef SYSVSEM 373 /* Initialize System V style semaphores. */ 374 seminit(); 375 #endif 376 377 #ifdef SYSVMSG 378 /* Initialize System V style message queues. */ 379 msginit(); 380 #endif 381 382 #ifdef P1003_1B_SEMAPHORE 383 /* Initialize posix semaphores */ 384 ksem_init(); 385 #endif 386 387 /* Initialize default security model. */ 388 secmodel_start(); 389 390 #if NVERIEXEC > 0 391 /* 392 * Initialise the Veriexec subsystem. 393 */ 394 veriexec_init(); 395 #endif /* NVERIEXEC > 0 */ 396 397 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 398 pax_init(); 399 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 400 401 /* Attach pseudo-devices. */ 402 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 403 (*pdev->pdev_attach)(pdev->pdev_count); 404 405 #ifdef FAST_IPSEC 406 /* Attach network crypto subsystem */ 407 ipsec_attach(); 408 #endif 409 410 /* 411 * Initialize protocols. Block reception of incoming packets 412 * until everything is ready. 413 */ 414 s = splnet(); 415 ifinit(); 416 domaininit(); 417 if_attachdomain(); 418 splx(s); 419 420 #ifdef GPROF 421 /* Initialize kernel profiling. */ 422 kmstartup(); 423 #endif 424 425 /* Initialize system accouting. */ 426 acct_init(); 427 428 /* Kick off timeout driven events by calling first time. */ 429 schedcpu(NULL); 430 431 /* 432 * Create process 1 (init(8)). We do this now, as Unix has 433 * historically had init be process 1, and changing this would 434 * probably upset a lot of people. 435 * 436 * Note that process 1 won't immediately exec init(8), but will 437 * wait for us to inform it that the root file system has been 438 * mounted. 439 */ 440 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 441 panic("fork init"); 442 443 /* 444 * Create any kernel threads who's creation was deferred because 445 * initproc had not yet been created. 446 */ 447 kthread_run_deferred_queue(); 448 449 /* 450 * Now that device driver threads have been created, wait for 451 * them to finish any deferred autoconfiguration. Note we don't 452 * need to lock this semaphore, since we haven't booted any 453 * secondary processors, yet. 454 */ 455 while (config_pending) 456 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 457 458 /* 459 * Finalize configuration now that all real devices have been 460 * found. This needs to be done before the root device is 461 * selected, since finalization may create the root device. 462 */ 463 config_finalize(); 464 465 /* 466 * Now that autoconfiguration has completed, we can determine 467 * the root and dump devices. 468 */ 469 cpu_rootconf(); 470 cpu_dumpconf(); 471 472 /* Mount the root file system. */ 473 do { 474 domountroothook(); 475 if ((error = vfs_mountroot())) { 476 printf("cannot mount root, error = %d\n", error); 477 boothowto |= RB_ASKNAME; 478 setroot(root_device, 479 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 480 } 481 } while (error != 0); 482 mountroothook_destroy(); 483 484 /* 485 * Initialise the time-of-day clock, passing the time recorded 486 * in the root filesystem (if any) for use by systems that 487 * don't have a non-volatile time-of-day device. 488 */ 489 inittodr(rootfstime); 490 491 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 492 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 493 494 /* 495 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 496 * reference it. 497 */ 498 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 499 if (error) 500 panic("cannot find root vnode, error=%d", error); 501 cwdi0.cwdi_cdir = rootvnode; 502 VREF(cwdi0.cwdi_cdir); 503 VOP_UNLOCK(rootvnode, 0); 504 cwdi0.cwdi_rdir = NULL; 505 506 /* 507 * Now that root is mounted, we can fixup initproc's CWD 508 * info. All other processes are kthreads, which merely 509 * share proc0's CWD info. 510 */ 511 initproc->p_cwdi->cwdi_cdir = rootvnode; 512 VREF(initproc->p_cwdi->cwdi_cdir); 513 initproc->p_cwdi->cwdi_rdir = NULL; 514 515 /* 516 * Now can look at time, having had a chance to verify the time 517 * from the file system. Reset p->p_rtime as it may have been 518 * munched in mi_switch() after the time got set. 519 */ 520 proclist_lock_read(); 521 s = splsched(); 522 #ifdef __HAVE_TIMECOUNTER 523 getmicrotime(&time); 524 #else 525 mono_time = time; 526 #endif 527 boottime = time; 528 LIST_FOREACH(p, &allproc, p_list) { 529 KASSERT((p->p_flag & P_MARKER) == 0); 530 p->p_stats->p_start = time; 531 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 532 if (l->l_cpu != NULL) 533 l->l_cpu->ci_schedstate.spc_runtime = time; 534 } 535 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 536 } 537 splx(s); 538 proclist_unlock_read(); 539 540 /* Create the pageout daemon kernel thread. */ 541 uvm_swap_init(); 542 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 543 panic("fork pagedaemon"); 544 545 /* Create the filesystem syncer kernel thread. */ 546 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 547 panic("fork syncer"); 548 549 /* Create the aiodone daemon kernel thread. */ 550 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 551 uvm_aiodone_worker, NULL, PVM, IPL_BIO, 0)) 552 panic("fork aiodoned"); 553 554 #if defined(MULTIPROCESSOR) 555 /* Boot the secondary processors. */ 556 cpu_boot_secondary_processors(); 557 #endif 558 559 /* Initialize exec structures */ 560 exec_init(1); 561 562 /* 563 * Okay, now we can let init(8) exec! It's off to userland! 564 */ 565 start_init_exec = 1; 566 wakeup(&start_init_exec); 567 568 /* The scheduler is an infinite loop. */ 569 uvm_scheduler(); 570 /* NOTREACHED */ 571 } 572 573 void 574 setrootfstime(time_t t) 575 { 576 rootfstime = t; 577 } 578 579 static void 580 check_console(struct lwp *l) 581 { 582 struct nameidata nd; 583 int error; 584 585 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 586 error = namei(&nd); 587 if (error == 0) 588 vrele(nd.ni_vp); 589 else if (error == ENOENT) 590 printf("warning: no /dev/console\n"); 591 else 592 printf("warning: lookup /dev/console: error %d\n", error); 593 } 594 595 /* 596 * List of paths to try when searching for "init". 597 */ 598 static const char *initpaths[] = { 599 "/sbin/init", 600 "/sbin/oinit", 601 "/sbin/init.bak", 602 NULL, 603 }; 604 605 /* 606 * Start the initial user process; try exec'ing each pathname in "initpaths". 607 * The program is invoked with one argument containing the boot flags. 608 */ 609 static void 610 start_init(void *arg) 611 { 612 struct lwp *l = arg; 613 struct proc *p = l->l_proc; 614 vaddr_t addr; 615 struct sys_execve_args /* { 616 syscallarg(const char *) path; 617 syscallarg(char * const *) argp; 618 syscallarg(char * const *) envp; 619 } */ args; 620 int options, i, error; 621 register_t retval[2]; 622 char flags[4], *flagsp; 623 const char *path, *slash; 624 char *ucp, **uap, *arg0, *arg1 = NULL; 625 char ipath[129]; 626 int ipx, len; 627 628 /* 629 * Now in process 1. 630 */ 631 strncpy(p->p_comm, "init", MAXCOMLEN); 632 633 /* 634 * Wait for main() to tell us that it's safe to exec. 635 */ 636 while (start_init_exec == 0) 637 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 638 639 /* 640 * This is not the right way to do this. We really should 641 * hand-craft a descriptor onto /dev/console to hand to init, 642 * but that's a _lot_ more work, and the benefit from this easy 643 * hack makes up for the "good is the enemy of the best" effect. 644 */ 645 check_console(l); 646 647 /* 648 * Need just enough stack to hold the faked-up "execve()" arguments. 649 */ 650 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 651 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 652 NULL, UVM_UNKNOWN_OFFSET, 0, 653 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 654 UVM_ADV_NORMAL, 655 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 656 panic("init: couldn't allocate argument space"); 657 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 658 659 ipx = 0; 660 while (1) { 661 if (boothowto & RB_ASKNAME) { 662 printf("init path"); 663 if (initpaths[ipx]) 664 printf(" (default %s)", initpaths[ipx]); 665 printf(": "); 666 len = cngetsn(ipath, sizeof(ipath)-1); 667 if (len == 0) { 668 if (initpaths[ipx]) 669 path = initpaths[ipx++]; 670 else 671 continue; 672 } else { 673 ipath[len] = '\0'; 674 path = ipath; 675 } 676 } else { 677 if ((path = initpaths[ipx++]) == NULL) 678 break; 679 } 680 681 ucp = (char *)USRSTACK; 682 683 /* 684 * Construct the boot flag argument. 685 */ 686 flagsp = flags; 687 *flagsp++ = '-'; 688 options = 0; 689 690 if (boothowto & RB_SINGLE) { 691 *flagsp++ = 's'; 692 options = 1; 693 } 694 #ifdef notyet 695 if (boothowto & RB_FASTBOOT) { 696 *flagsp++ = 'f'; 697 options = 1; 698 } 699 #endif 700 701 /* 702 * Move out the flags (arg 1), if necessary. 703 */ 704 if (options != 0) { 705 *flagsp++ = '\0'; 706 i = flagsp - flags; 707 #ifdef DEBUG 708 printf("init: copying out flags `%s' %d\n", flags, i); 709 #endif 710 arg1 = STACK_ALLOC(ucp, i); 711 ucp = STACK_MAX(arg1, i); 712 (void)copyout((caddr_t)flags, arg1, i); 713 } 714 715 /* 716 * Move out the file name (also arg 0). 717 */ 718 i = strlen(path) + 1; 719 #ifdef DEBUG 720 printf("init: copying out path `%s' %d\n", path, i); 721 #else 722 if (boothowto & RB_ASKNAME || path != initpaths[0]) 723 printf("init: trying %s\n", path); 724 #endif 725 arg0 = STACK_ALLOC(ucp, i); 726 ucp = STACK_MAX(arg0, i); 727 (void)copyout(path, arg0, i); 728 729 /* 730 * Move out the arg pointers. 731 */ 732 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 733 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 734 SCARG(&args, path) = arg0; 735 SCARG(&args, argp) = uap; 736 SCARG(&args, envp) = NULL; 737 slash = strrchr(path, '/'); 738 if (slash) 739 (void)suword((caddr_t)uap++, 740 (long)arg0 + (slash + 1 - path)); 741 else 742 (void)suword((caddr_t)uap++, (long)arg0); 743 if (options != 0) 744 (void)suword((caddr_t)uap++, (long)arg1); 745 (void)suword((caddr_t)uap++, 0); /* terminator */ 746 747 /* 748 * Now try to exec the program. If can't for any reason 749 * other than it doesn't exist, complain. 750 */ 751 error = sys_execve(l, &args, retval); 752 if (error == 0 || error == EJUSTRETURN) { 753 KERNEL_PROC_UNLOCK(l); 754 return; 755 } 756 printf("exec %s: error %d\n", path, error); 757 } 758 printf("init: not found\n"); 759 panic("no init"); 760 } 761
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