init_main.c revision 1.286
1 /* $NetBSD: init_main.c,v 1.286 2006/12/21 15:55:25 yamt 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 1.286 2006/12/21 15:55:25 yamt 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 /* 207 * System startup; initialize the world, create process 0, mount root 208 * filesystem, and fork to create init and pagedaemon. Most of the 209 * hard work is done in the lower-level initialization routines including 210 * startup(), which does memory initialization and autoconfiguration. 211 */ 212 void 213 main(void) 214 { 215 #ifdef __HAVE_TIMECOUNTER 216 struct timeval time; 217 #endif 218 struct lwp *l; 219 struct proc *p; 220 struct pdevinit *pdev; 221 int s, error; 222 extern struct pdevinit pdevinit[]; 223 extern void schedcpu(void *); 224 #ifdef NVNODE_IMPLICIT 225 int usevnodes; 226 #endif 227 228 /* 229 * Initialize the current LWP pointer (curlwp) before 230 * any possible traps/probes to simplify trap processing. 231 */ 232 l = &lwp0; 233 curlwp = l; 234 l->l_cpu = curcpu(); 235 l->l_proc = &proc0; 236 l->l_lid = 1; 237 238 /* 239 * Attempt to find console and initialize 240 * in case of early panic or other messages. 241 */ 242 consinit(); 243 244 KERNEL_LOCK_INIT(); 245 246 uvm_init(); 247 248 kmem_init(); 249 250 /* Do machine-dependent initialization. */ 251 cpu_startup(); 252 253 /* Initialize callouts. */ 254 callout_startup(); 255 256 /* Initialize the buffer cache */ 257 bufinit(); 258 259 /* 260 * Initialize mbuf's. Do this now because we might attempt to 261 * allocate mbufs or mbuf clusters during autoconfiguration. 262 */ 263 mbinit(); 264 265 /* Initialize sockets. */ 266 soinit(); 267 268 #ifdef KCONT 269 /* Initialize kcont. */ 270 kcont_init(); 271 #endif 272 273 /* 274 * The following things must be done before autoconfiguration. 275 */ 276 evcnt_init(); /* initialize event counters */ 277 #if NRND > 0 278 rnd_init(); /* initialize RNG */ 279 #endif 280 /* Initialize the sysctl subsystem. */ 281 sysctl_init(); 282 283 /* Initialize process and pgrp structures. */ 284 procinit(); 285 lwpinit(); 286 287 /* Initialize signal-related data structures. */ 288 signal_init(); 289 290 /* Create process 0 (the swapper). */ 291 proc0_init(); 292 293 /* 294 * Charge root for one process. 295 */ 296 (void)chgproccnt(0, 1); 297 298 rqinit(); 299 300 /* Initialize I/O statistics. */ 301 iostat_init(); 302 303 /* Initialize the file systems. */ 304 #ifdef NVNODE_IMPLICIT 305 /* 306 * If maximum number of vnodes in namei vnode cache is not explicitly 307 * defined in kernel config, adjust the number such as we use roughly 308 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 309 */ 310 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 311 if (usevnodes > desiredvnodes) 312 desiredvnodes = usevnodes; 313 #endif 314 vfsinit(); 315 316 317 #ifdef __HAVE_TIMECOUNTER 318 inittimecounter(); 319 ntp_init(); 320 #endif /* __HAVE_TIMECOUNTER */ 321 322 /* Initialize kauth. */ 323 kauth_init(); 324 325 /* Configure the system hardware. This will enable interrupts. */ 326 configure(); 327 328 #if defined(__SSP__) || defined(__SSP_ALL__) 329 { 330 #ifdef DIAGNOSTIC 331 printf("Initializing SSP:"); 332 #endif 333 /* 334 * We initialize ssp here carefully: 335 * 1. after we got some entropy 336 * 2. without calling a function 337 */ 338 size_t i; 339 long guard[__arraycount(__stack_chk_guard)]; 340 341 arc4randbytes(guard, sizeof(guard)); 342 for (i = 0; i < __arraycount(guard); i++) 343 __stack_chk_guard[i] = guard[i]; 344 #ifdef DIAGNOSTIC 345 for (i = 0; i < __arraycount(guard); i++) 346 printf("%lx ", guard[i]); 347 printf("\n"); 348 #endif 349 } 350 #endif 351 ubc_init(); /* must be after autoconfig */ 352 353 /* Lock the kernel on behalf of proc0. */ 354 KERNEL_PROC_LOCK(l); 355 356 #ifdef SYSVSHM 357 /* Initialize System V style shared memory. */ 358 shminit(); 359 #endif 360 361 #ifdef SYSVSEM 362 /* Initialize System V style semaphores. */ 363 seminit(); 364 #endif 365 366 #ifdef SYSVMSG 367 /* Initialize System V style message queues. */ 368 msginit(); 369 #endif 370 371 #ifdef P1003_1B_SEMAPHORE 372 /* Initialize posix semaphores */ 373 ksem_init(); 374 #endif 375 376 /* Initialize default security model. */ 377 secmodel_start(); 378 379 #if NVERIEXEC > 0 380 /* 381 * Initialise the Veriexec subsystem. 382 */ 383 veriexec_init(); 384 #endif /* NVERIEXEC > 0 */ 385 386 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 387 pax_init(); 388 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 389 390 /* Attach pseudo-devices. */ 391 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 392 (*pdev->pdev_attach)(pdev->pdev_count); 393 394 #ifdef FAST_IPSEC 395 /* Attach network crypto subsystem */ 396 ipsec_attach(); 397 #endif 398 399 /* 400 * Initialize protocols. Block reception of incoming packets 401 * until everything is ready. 402 */ 403 s = splnet(); 404 ifinit(); 405 domaininit(); 406 if_attachdomain(); 407 splx(s); 408 409 #ifdef GPROF 410 /* Initialize kernel profiling. */ 411 kmstartup(); 412 #endif 413 414 /* Initialize system accouting. */ 415 acct_init(); 416 417 /* Kick off timeout driven events by calling first time. */ 418 schedcpu(NULL); 419 420 /* 421 * Create process 1 (init(8)). We do this now, as Unix has 422 * historically had init be process 1, and changing this would 423 * probably upset a lot of people. 424 * 425 * Note that process 1 won't immediately exec init(8), but will 426 * wait for us to inform it that the root file system has been 427 * mounted. 428 */ 429 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 430 panic("fork init"); 431 432 /* 433 * Create any kernel threads who's creation was deferred because 434 * initproc had not yet been created. 435 */ 436 kthread_run_deferred_queue(); 437 438 /* 439 * Now that device driver threads have been created, wait for 440 * them to finish any deferred autoconfiguration. Note we don't 441 * need to lock this semaphore, since we haven't booted any 442 * secondary processors, yet. 443 */ 444 while (config_pending) 445 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 446 447 /* 448 * Finalize configuration now that all real devices have been 449 * found. This needs to be done before the root device is 450 * selected, since finalization may create the root device. 451 */ 452 config_finalize(); 453 454 /* 455 * Now that autoconfiguration has completed, we can determine 456 * the root and dump devices. 457 */ 458 cpu_rootconf(); 459 cpu_dumpconf(); 460 461 /* Mount the root file system. */ 462 do { 463 domountroothook(); 464 if ((error = vfs_mountroot())) { 465 printf("cannot mount root, error = %d\n", error); 466 boothowto |= RB_ASKNAME; 467 setroot(root_device, 468 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 469 } 470 } while (error != 0); 471 mountroothook_destroy(); 472 473 /* 474 * Initialise the time-of-day clock, passing the time recorded 475 * in the root filesystem (if any) for use by systems that 476 * don't have a non-volatile time-of-day device. 477 */ 478 inittodr(rootfstime); 479 480 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 481 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 482 483 /* 484 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 485 * reference it. 486 */ 487 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 488 if (error) 489 panic("cannot find root vnode, error=%d", error); 490 cwdi0.cwdi_cdir = rootvnode; 491 VREF(cwdi0.cwdi_cdir); 492 VOP_UNLOCK(rootvnode, 0); 493 cwdi0.cwdi_rdir = NULL; 494 495 /* 496 * Now that root is mounted, we can fixup initproc's CWD 497 * info. All other processes are kthreads, which merely 498 * share proc0's CWD info. 499 */ 500 initproc->p_cwdi->cwdi_cdir = rootvnode; 501 VREF(initproc->p_cwdi->cwdi_cdir); 502 initproc->p_cwdi->cwdi_rdir = NULL; 503 504 /* 505 * Now can look at time, having had a chance to verify the time 506 * from the file system. Reset p->p_rtime as it may have been 507 * munched in mi_switch() after the time got set. 508 */ 509 proclist_lock_read(); 510 s = splsched(); 511 #ifdef __HAVE_TIMECOUNTER 512 getmicrotime(&time); 513 #else 514 mono_time = time; 515 #endif 516 boottime = time; 517 LIST_FOREACH(p, &allproc, p_list) { 518 KASSERT((p->p_flag & P_MARKER) == 0); 519 p->p_stats->p_start = time; 520 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 521 if (l->l_cpu != NULL) 522 l->l_cpu->ci_schedstate.spc_runtime = time; 523 } 524 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 525 } 526 splx(s); 527 proclist_unlock_read(); 528 529 /* Create the pageout daemon kernel thread. */ 530 uvm_swap_init(); 531 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 532 panic("fork pagedaemon"); 533 534 /* Create the filesystem syncer kernel thread. */ 535 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 536 panic("fork syncer"); 537 538 /* Create the aiodone daemon kernel thread. */ 539 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 540 uvm_aiodone_worker, NULL, PVM, IPL_BIO, 0)) 541 panic("fork aiodoned"); 542 543 #if defined(MULTIPROCESSOR) 544 /* Boot the secondary processors. */ 545 cpu_boot_secondary_processors(); 546 #endif 547 548 /* Initialize exec structures */ 549 exec_init(1); 550 551 /* 552 * Okay, now we can let init(8) exec! It's off to userland! 553 */ 554 start_init_exec = 1; 555 wakeup(&start_init_exec); 556 557 /* The scheduler is an infinite loop. */ 558 uvm_scheduler(); 559 /* NOTREACHED */ 560 } 561 562 void 563 setrootfstime(time_t t) 564 { 565 rootfstime = t; 566 } 567 568 static void 569 check_console(struct lwp *l) 570 { 571 struct nameidata nd; 572 int error; 573 574 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 575 error = namei(&nd); 576 if (error == 0) 577 vrele(nd.ni_vp); 578 else if (error == ENOENT) 579 printf("warning: no /dev/console\n"); 580 else 581 printf("warning: lookup /dev/console: error %d\n", error); 582 } 583 584 /* 585 * List of paths to try when searching for "init". 586 */ 587 static const char *initpaths[] = { 588 "/sbin/init", 589 "/sbin/oinit", 590 "/sbin/init.bak", 591 NULL, 592 }; 593 594 /* 595 * Start the initial user process; try exec'ing each pathname in "initpaths". 596 * The program is invoked with one argument containing the boot flags. 597 */ 598 static void 599 start_init(void *arg) 600 { 601 struct lwp *l = arg; 602 struct proc *p = l->l_proc; 603 vaddr_t addr; 604 struct sys_execve_args /* { 605 syscallarg(const char *) path; 606 syscallarg(char * const *) argp; 607 syscallarg(char * const *) envp; 608 } */ args; 609 int options, i, error; 610 register_t retval[2]; 611 char flags[4], *flagsp; 612 const char *path, *slash; 613 char *ucp, **uap, *arg0, *arg1 = NULL; 614 char ipath[129]; 615 int ipx, len; 616 617 /* 618 * Now in process 1. 619 */ 620 strncpy(p->p_comm, "init", MAXCOMLEN); 621 622 /* 623 * Wait for main() to tell us that it's safe to exec. 624 */ 625 while (start_init_exec == 0) 626 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 627 628 /* 629 * This is not the right way to do this. We really should 630 * hand-craft a descriptor onto /dev/console to hand to init, 631 * but that's a _lot_ more work, and the benefit from this easy 632 * hack makes up for the "good is the enemy of the best" effect. 633 */ 634 check_console(l); 635 636 /* 637 * Need just enough stack to hold the faked-up "execve()" arguments. 638 */ 639 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 640 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 641 NULL, UVM_UNKNOWN_OFFSET, 0, 642 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 643 UVM_ADV_NORMAL, 644 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 645 panic("init: couldn't allocate argument space"); 646 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 647 648 ipx = 0; 649 while (1) { 650 if (boothowto & RB_ASKNAME) { 651 printf("init path"); 652 if (initpaths[ipx]) 653 printf(" (default %s)", initpaths[ipx]); 654 printf(": "); 655 len = cngetsn(ipath, sizeof(ipath)-1); 656 if (len == 0) { 657 if (initpaths[ipx]) 658 path = initpaths[ipx++]; 659 else 660 continue; 661 } else { 662 ipath[len] = '\0'; 663 path = ipath; 664 } 665 } else { 666 if ((path = initpaths[ipx++]) == NULL) 667 break; 668 } 669 670 ucp = (char *)USRSTACK; 671 672 /* 673 * Construct the boot flag argument. 674 */ 675 flagsp = flags; 676 *flagsp++ = '-'; 677 options = 0; 678 679 if (boothowto & RB_SINGLE) { 680 *flagsp++ = 's'; 681 options = 1; 682 } 683 #ifdef notyet 684 if (boothowto & RB_FASTBOOT) { 685 *flagsp++ = 'f'; 686 options = 1; 687 } 688 #endif 689 690 /* 691 * Move out the flags (arg 1), if necessary. 692 */ 693 if (options != 0) { 694 *flagsp++ = '\0'; 695 i = flagsp - flags; 696 #ifdef DEBUG 697 printf("init: copying out flags `%s' %d\n", flags, i); 698 #endif 699 arg1 = STACK_ALLOC(ucp, i); 700 ucp = STACK_MAX(arg1, i); 701 (void)copyout((caddr_t)flags, arg1, i); 702 } 703 704 /* 705 * Move out the file name (also arg 0). 706 */ 707 i = strlen(path) + 1; 708 #ifdef DEBUG 709 printf("init: copying out path `%s' %d\n", path, i); 710 #else 711 if (boothowto & RB_ASKNAME || path != initpaths[0]) 712 printf("init: trying %s\n", path); 713 #endif 714 arg0 = STACK_ALLOC(ucp, i); 715 ucp = STACK_MAX(arg0, i); 716 (void)copyout(path, arg0, i); 717 718 /* 719 * Move out the arg pointers. 720 */ 721 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 722 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 723 SCARG(&args, path) = arg0; 724 SCARG(&args, argp) = uap; 725 SCARG(&args, envp) = NULL; 726 slash = strrchr(path, '/'); 727 if (slash) 728 (void)suword((caddr_t)uap++, 729 (long)arg0 + (slash + 1 - path)); 730 else 731 (void)suword((caddr_t)uap++, (long)arg0); 732 if (options != 0) 733 (void)suword((caddr_t)uap++, (long)arg1); 734 (void)suword((caddr_t)uap++, 0); /* terminator */ 735 736 /* 737 * Now try to exec the program. If can't for any reason 738 * other than it doesn't exist, complain. 739 */ 740 error = sys_execve(l, &args, retval); 741 if (error == 0 || error == EJUSTRETURN) { 742 KERNEL_PROC_UNLOCK(l); 743 return; 744 } 745 printf("exec %s: error %d\n", path, error); 746 } 747 printf("init: not found\n"); 748 panic("no init"); 749 } 750
Indexes created Wed Sep 24 05:09:52 GMT 2025