init_main.c revision 1.287
1 /* $NetBSD: init_main.c,v 1.287 2007/01/17 12:27:24 elad 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 1.287 2007/01/17 12:27:24 elad 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/tty.h> 106 #include <sys/conf.h> 107 #include <sys/disklabel.h> 108 #include <sys/buf.h> 109 #include <sys/device.h> 110 #include <sys/exec.h> 111 #include <sys/socketvar.h> 112 #include <sys/protosw.h> 113 #include <sys/reboot.h> 114 #include <sys/user.h> 115 #include <sys/sysctl.h> 116 #include <sys/event.h> 117 #include <sys/mbuf.h> 118 #include <sys/iostat.h> 119 #ifdef FAST_IPSEC 120 #include <netipsec/ipsec.h> 121 #endif 122 #ifdef SYSVSHM 123 #include <sys/shm.h> 124 #endif 125 #ifdef SYSVSEM 126 #include <sys/sem.h> 127 #endif 128 #ifdef SYSVMSG 129 #include <sys/msg.h> 130 #endif 131 #ifdef P1003_1B_SEMAPHORE 132 #include <sys/ksem.h> 133 #endif 134 #include <sys/domain.h> 135 #include <sys/namei.h> 136 #if NRND > 0 137 #include <sys/rnd.h> 138 #endif 139 #ifndef PIPE_SOCKETPAIR 140 #include <sys/pipe.h> 141 #endif 142 #ifdef LKM 143 #include <sys/lkm.h> 144 #endif 145 #if NVERIEXEC > 0 146 #include <sys/verified_exec.h> 147 #endif /* NVERIEXEC > 0 */ 148 #include <sys/kauth.h> 149 #include <net80211/ieee80211_netbsd.h> 150 151 #include <sys/syscall.h> 152 #include <sys/sa.h> 153 #include <sys/syscallargs.h> 154 155 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 156 #include <sys/pax.h> 157 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 158 #include <ufs/ufs/quota.h> 159 160 #include <miscfs/genfs/genfs.h> 161 #include <miscfs/syncfs/syncfs.h> 162 163 #include <machine/cpu.h> 164 165 #include <uvm/uvm.h> 166 167 #include <dev/cons.h> 168 169 #include <net/if.h> 170 #include <net/raw_cb.h> 171 172 #include <secmodel/secmodel.h> 173 174 extern struct proc proc0; 175 extern struct lwp lwp0; 176 extern struct cwdinfo cwdi0; 177 178 #ifndef curlwp 179 struct lwp *curlwp = &lwp0; 180 #endif 181 struct proc *initproc; 182 183 struct vnode *rootvp, *swapdev_vp; 184 int boothowto; 185 int cold = 1; /* still working on startup */ 186 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 187 time_t rootfstime; /* recorded root fs time, if known */ 188 189 volatile int start_init_exec; /* semaphore for start_init() */ 190 191 static void check_console(struct lwp *l); 192 static void start_init(void *); 193 void main(void); 194 195 #if defined(__SSP__) || defined(__SSP_ALL__) 196 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 197 void __stack_chk_fail(void); 198 199 void 200 __stack_chk_fail(void) 201 { 202 panic("stack overflow detected; terminated"); 203 } 204 #endif 205 206 void __secmodel_none(void); 207 __weak_alias(secmodel_start, __secmodel_none); 208 void 209 __secmodel_none(void) 210 { 211 return; 212 } 213 214 /* 215 * System startup; initialize the world, create process 0, mount root 216 * filesystem, and fork to create init and pagedaemon. Most of the 217 * hard work is done in the lower-level initialization routines including 218 * startup(), which does memory initialization and autoconfiguration. 219 */ 220 void 221 main(void) 222 { 223 #ifdef __HAVE_TIMECOUNTER 224 struct timeval time; 225 #endif 226 struct lwp *l; 227 struct proc *p; 228 struct pdevinit *pdev; 229 int s, error; 230 extern struct pdevinit pdevinit[]; 231 extern void schedcpu(void *); 232 #ifdef NVNODE_IMPLICIT 233 int usevnodes; 234 #endif 235 236 /* 237 * Initialize the current LWP pointer (curlwp) before 238 * any possible traps/probes to simplify trap processing. 239 */ 240 l = &lwp0; 241 curlwp = l; 242 l->l_cpu = curcpu(); 243 l->l_proc = &proc0; 244 l->l_lid = 1; 245 246 /* 247 * Attempt to find console and initialize 248 * in case of early panic or other messages. 249 */ 250 consinit(); 251 252 KERNEL_LOCK_INIT(); 253 254 uvm_init(); 255 256 kmem_init(); 257 258 /* Do machine-dependent initialization. */ 259 cpu_startup(); 260 261 /* Initialize callouts. */ 262 callout_startup(); 263 264 /* Initialize the buffer cache */ 265 bufinit(); 266 267 /* 268 * Initialize mbuf's. Do this now because we might attempt to 269 * allocate mbufs or mbuf clusters during autoconfiguration. 270 */ 271 mbinit(); 272 273 /* Initialize sockets. */ 274 soinit(); 275 276 #ifdef KCONT 277 /* Initialize kcont. */ 278 kcont_init(); 279 #endif 280 281 /* 282 * The following things must be done before autoconfiguration. 283 */ 284 evcnt_init(); /* initialize event counters */ 285 #if NRND > 0 286 rnd_init(); /* initialize RNG */ 287 #endif 288 /* Initialize the sysctl subsystem. */ 289 sysctl_init(); 290 291 /* Initialize process and pgrp structures. */ 292 procinit(); 293 lwpinit(); 294 295 /* Initialize signal-related data structures. */ 296 signal_init(); 297 298 /* Create process 0 (the swapper). */ 299 proc0_init(); 300 301 /* 302 * Charge root for one process. 303 */ 304 (void)chgproccnt(0, 1); 305 306 rqinit(); 307 308 /* Initialize I/O statistics. */ 309 iostat_init(); 310 311 /* Initialize the file systems. */ 312 #ifdef NVNODE_IMPLICIT 313 /* 314 * If maximum number of vnodes in namei vnode cache is not explicitly 315 * defined in kernel config, adjust the number such as we use roughly 316 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 317 */ 318 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 319 if (usevnodes > desiredvnodes) 320 desiredvnodes = usevnodes; 321 #endif 322 vfsinit(); 323 324 325 #ifdef __HAVE_TIMECOUNTER 326 inittimecounter(); 327 ntp_init(); 328 #endif /* __HAVE_TIMECOUNTER */ 329 330 /* Initialize kauth. */ 331 kauth_init(); 332 333 /* Configure the system hardware. This will enable interrupts. */ 334 configure(); 335 336 #if defined(__SSP__) || defined(__SSP_ALL__) 337 { 338 #ifdef DIAGNOSTIC 339 printf("Initializing SSP:"); 340 #endif 341 /* 342 * We initialize ssp here carefully: 343 * 1. after we got some entropy 344 * 2. without calling a function 345 */ 346 size_t i; 347 long guard[__arraycount(__stack_chk_guard)]; 348 349 arc4randbytes(guard, sizeof(guard)); 350 for (i = 0; i < __arraycount(guard); i++) 351 __stack_chk_guard[i] = guard[i]; 352 #ifdef DIAGNOSTIC 353 for (i = 0; i < __arraycount(guard); i++) 354 printf("%lx ", guard[i]); 355 printf("\n"); 356 #endif 357 } 358 #endif 359 ubc_init(); /* must be after autoconfig */ 360 361 /* Lock the kernel on behalf of proc0. */ 362 KERNEL_PROC_LOCK(l); 363 364 #ifdef SYSVSHM 365 /* Initialize System V style shared memory. */ 366 shminit(); 367 #endif 368 369 #ifdef SYSVSEM 370 /* Initialize System V style semaphores. */ 371 seminit(); 372 #endif 373 374 #ifdef SYSVMSG 375 /* Initialize System V style message queues. */ 376 msginit(); 377 #endif 378 379 #ifdef P1003_1B_SEMAPHORE 380 /* Initialize posix semaphores */ 381 ksem_init(); 382 #endif 383 384 /* Initialize default security model. */ 385 secmodel_start(); 386 387 #if NVERIEXEC > 0 388 /* 389 * Initialise the Veriexec subsystem. 390 */ 391 veriexec_init(); 392 #endif /* NVERIEXEC > 0 */ 393 394 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 395 pax_init(); 396 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 397 398 /* Attach pseudo-devices. */ 399 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 400 (*pdev->pdev_attach)(pdev->pdev_count); 401 402 #ifdef FAST_IPSEC 403 /* Attach network crypto subsystem */ 404 ipsec_attach(); 405 #endif 406 407 /* 408 * Initialize protocols. Block reception of incoming packets 409 * until everything is ready. 410 */ 411 s = splnet(); 412 ifinit(); 413 domaininit(); 414 if_attachdomain(); 415 splx(s); 416 417 #ifdef GPROF 418 /* Initialize kernel profiling. */ 419 kmstartup(); 420 #endif 421 422 /* Initialize system accouting. */ 423 acct_init(); 424 425 /* Kick off timeout driven events by calling first time. */ 426 schedcpu(NULL); 427 428 /* 429 * Create process 1 (init(8)). We do this now, as Unix has 430 * historically had init be process 1, and changing this would 431 * probably upset a lot of people. 432 * 433 * Note that process 1 won't immediately exec init(8), but will 434 * wait for us to inform it that the root file system has been 435 * mounted. 436 */ 437 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 438 panic("fork init"); 439 440 /* 441 * Create any kernel threads who's creation was deferred because 442 * initproc had not yet been created. 443 */ 444 kthread_run_deferred_queue(); 445 446 /* 447 * Now that device driver threads have been created, wait for 448 * them to finish any deferred autoconfiguration. Note we don't 449 * need to lock this semaphore, since we haven't booted any 450 * secondary processors, yet. 451 */ 452 while (config_pending) 453 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 454 455 /* 456 * Finalize configuration now that all real devices have been 457 * found. This needs to be done before the root device is 458 * selected, since finalization may create the root device. 459 */ 460 config_finalize(); 461 462 /* 463 * Now that autoconfiguration has completed, we can determine 464 * the root and dump devices. 465 */ 466 cpu_rootconf(); 467 cpu_dumpconf(); 468 469 /* Mount the root file system. */ 470 do { 471 domountroothook(); 472 if ((error = vfs_mountroot())) { 473 printf("cannot mount root, error = %d\n", error); 474 boothowto |= RB_ASKNAME; 475 setroot(root_device, 476 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 477 } 478 } while (error != 0); 479 mountroothook_destroy(); 480 481 /* 482 * Initialise the time-of-day clock, passing the time recorded 483 * in the root filesystem (if any) for use by systems that 484 * don't have a non-volatile time-of-day device. 485 */ 486 inittodr(rootfstime); 487 488 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 489 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 490 491 /* 492 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 493 * reference it. 494 */ 495 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 496 if (error) 497 panic("cannot find root vnode, error=%d", error); 498 cwdi0.cwdi_cdir = rootvnode; 499 VREF(cwdi0.cwdi_cdir); 500 VOP_UNLOCK(rootvnode, 0); 501 cwdi0.cwdi_rdir = NULL; 502 503 /* 504 * Now that root is mounted, we can fixup initproc's CWD 505 * info. All other processes are kthreads, which merely 506 * share proc0's CWD info. 507 */ 508 initproc->p_cwdi->cwdi_cdir = rootvnode; 509 VREF(initproc->p_cwdi->cwdi_cdir); 510 initproc->p_cwdi->cwdi_rdir = NULL; 511 512 /* 513 * Now can look at time, having had a chance to verify the time 514 * from the file system. Reset p->p_rtime as it may have been 515 * munched in mi_switch() after the time got set. 516 */ 517 proclist_lock_read(); 518 s = splsched(); 519 #ifdef __HAVE_TIMECOUNTER 520 getmicrotime(&time); 521 #else 522 mono_time = time; 523 #endif 524 boottime = time; 525 LIST_FOREACH(p, &allproc, p_list) { 526 KASSERT((p->p_flag & P_MARKER) == 0); 527 p->p_stats->p_start = time; 528 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 529 if (l->l_cpu != NULL) 530 l->l_cpu->ci_schedstate.spc_runtime = time; 531 } 532 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 533 } 534 splx(s); 535 proclist_unlock_read(); 536 537 /* Create the pageout daemon kernel thread. */ 538 uvm_swap_init(); 539 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 540 panic("fork pagedaemon"); 541 542 /* Create the filesystem syncer kernel thread. */ 543 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 544 panic("fork syncer"); 545 546 /* Create the aiodone daemon kernel thread. */ 547 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 548 uvm_aiodone_worker, NULL, PVM, IPL_BIO, 0)) 549 panic("fork aiodoned"); 550 551 #if defined(MULTIPROCESSOR) 552 /* Boot the secondary processors. */ 553 cpu_boot_secondary_processors(); 554 #endif 555 556 /* Initialize exec structures */ 557 exec_init(1); 558 559 /* 560 * Okay, now we can let init(8) exec! It's off to userland! 561 */ 562 start_init_exec = 1; 563 wakeup(&start_init_exec); 564 565 /* The scheduler is an infinite loop. */ 566 uvm_scheduler(); 567 /* NOTREACHED */ 568 } 569 570 void 571 setrootfstime(time_t t) 572 { 573 rootfstime = t; 574 } 575 576 static void 577 check_console(struct lwp *l) 578 { 579 struct nameidata nd; 580 int error; 581 582 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 583 error = namei(&nd); 584 if (error == 0) 585 vrele(nd.ni_vp); 586 else if (error == ENOENT) 587 printf("warning: no /dev/console\n"); 588 else 589 printf("warning: lookup /dev/console: error %d\n", error); 590 } 591 592 /* 593 * List of paths to try when searching for "init". 594 */ 595 static const char *initpaths[] = { 596 "/sbin/init", 597 "/sbin/oinit", 598 "/sbin/init.bak", 599 NULL, 600 }; 601 602 /* 603 * Start the initial user process; try exec'ing each pathname in "initpaths". 604 * The program is invoked with one argument containing the boot flags. 605 */ 606 static void 607 start_init(void *arg) 608 { 609 struct lwp *l = arg; 610 struct proc *p = l->l_proc; 611 vaddr_t addr; 612 struct sys_execve_args /* { 613 syscallarg(const char *) path; 614 syscallarg(char * const *) argp; 615 syscallarg(char * const *) envp; 616 } */ args; 617 int options, i, error; 618 register_t retval[2]; 619 char flags[4], *flagsp; 620 const char *path, *slash; 621 char *ucp, **uap, *arg0, *arg1 = NULL; 622 char ipath[129]; 623 int ipx, len; 624 625 /* 626 * Now in process 1. 627 */ 628 strncpy(p->p_comm, "init", MAXCOMLEN); 629 630 /* 631 * Wait for main() to tell us that it's safe to exec. 632 */ 633 while (start_init_exec == 0) 634 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 635 636 /* 637 * This is not the right way to do this. We really should 638 * hand-craft a descriptor onto /dev/console to hand to init, 639 * but that's a _lot_ more work, and the benefit from this easy 640 * hack makes up for the "good is the enemy of the best" effect. 641 */ 642 check_console(l); 643 644 /* 645 * Need just enough stack to hold the faked-up "execve()" arguments. 646 */ 647 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 648 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 649 NULL, UVM_UNKNOWN_OFFSET, 0, 650 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 651 UVM_ADV_NORMAL, 652 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 653 panic("init: couldn't allocate argument space"); 654 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 655 656 ipx = 0; 657 while (1) { 658 if (boothowto & RB_ASKNAME) { 659 printf("init path"); 660 if (initpaths[ipx]) 661 printf(" (default %s)", initpaths[ipx]); 662 printf(": "); 663 len = cngetsn(ipath, sizeof(ipath)-1); 664 if (len == 0) { 665 if (initpaths[ipx]) 666 path = initpaths[ipx++]; 667 else 668 continue; 669 } else { 670 ipath[len] = '\0'; 671 path = ipath; 672 } 673 } else { 674 if ((path = initpaths[ipx++]) == NULL) 675 break; 676 } 677 678 ucp = (char *)USRSTACK; 679 680 /* 681 * Construct the boot flag argument. 682 */ 683 flagsp = flags; 684 *flagsp++ = '-'; 685 options = 0; 686 687 if (boothowto & RB_SINGLE) { 688 *flagsp++ = 's'; 689 options = 1; 690 } 691 #ifdef notyet 692 if (boothowto & RB_FASTBOOT) { 693 *flagsp++ = 'f'; 694 options = 1; 695 } 696 #endif 697 698 /* 699 * Move out the flags (arg 1), if necessary. 700 */ 701 if (options != 0) { 702 *flagsp++ = '\0'; 703 i = flagsp - flags; 704 #ifdef DEBUG 705 printf("init: copying out flags `%s' %d\n", flags, i); 706 #endif 707 arg1 = STACK_ALLOC(ucp, i); 708 ucp = STACK_MAX(arg1, i); 709 (void)copyout((caddr_t)flags, arg1, i); 710 } 711 712 /* 713 * Move out the file name (also arg 0). 714 */ 715 i = strlen(path) + 1; 716 #ifdef DEBUG 717 printf("init: copying out path `%s' %d\n", path, i); 718 #else 719 if (boothowto & RB_ASKNAME || path != initpaths[0]) 720 printf("init: trying %s\n", path); 721 #endif 722 arg0 = STACK_ALLOC(ucp, i); 723 ucp = STACK_MAX(arg0, i); 724 (void)copyout(path, arg0, i); 725 726 /* 727 * Move out the arg pointers. 728 */ 729 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 730 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 731 SCARG(&args, path) = arg0; 732 SCARG(&args, argp) = uap; 733 SCARG(&args, envp) = NULL; 734 slash = strrchr(path, '/'); 735 if (slash) 736 (void)suword((caddr_t)uap++, 737 (long)arg0 + (slash + 1 - path)); 738 else 739 (void)suword((caddr_t)uap++, (long)arg0); 740 if (options != 0) 741 (void)suword((caddr_t)uap++, (long)arg1); 742 (void)suword((caddr_t)uap++, 0); /* terminator */ 743 744 /* 745 * Now try to exec the program. If can't for any reason 746 * other than it doesn't exist, complain. 747 */ 748 error = sys_execve(l, &args, retval); 749 if (error == 0 || error == EJUSTRETURN) { 750 KERNEL_PROC_UNLOCK(l); 751 return; 752 } 753 printf("exec %s: error %d\n", path, error); 754 } 755 printf("init: not found\n"); 756 panic("no init"); 757 } 758
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