init_main.c revision 1.284
1 /* $NetBSD: init_main.c,v 1.284 2006/12/07 20:23:38 ad 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 1.284 2006/12/07 20:23:38 ad 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_fileassoc.h" 85 #include "opt_pax.h" 86 87 #include "rnd.h" 88 #include "veriexec.h" 89 90 #include <sys/param.h> 91 #include <sys/acct.h> 92 #include <sys/filedesc.h> 93 #include <sys/file.h> 94 #include <sys/errno.h> 95 #include <sys/callout.h> 96 #include <sys/kernel.h> 97 #include <sys/kcont.h> 98 #include <sys/kmem.h> 99 #include <sys/mount.h> 100 #include <sys/proc.h> 101 #include <sys/kthread.h> 102 #include <sys/resourcevar.h> 103 #include <sys/signalvar.h> 104 #include <sys/systm.h> 105 #include <sys/vnode.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 #ifdef FILEASSOC 157 #include <sys/fileassoc.h> 158 #endif /* FILEASSOC */ 159 160 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 161 #include <sys/pax.h> 162 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 163 #include <ufs/ufs/quota.h> 164 165 #include <miscfs/genfs/genfs.h> 166 #include <miscfs/syncfs/syncfs.h> 167 168 #include <machine/cpu.h> 169 170 #include <uvm/uvm.h> 171 172 #include <dev/cons.h> 173 174 #include <net/if.h> 175 #include <net/raw_cb.h> 176 177 #include <secmodel/secmodel.h> 178 179 extern struct proc proc0; 180 extern struct lwp lwp0; 181 extern struct cwdinfo cwdi0; 182 183 #ifndef curlwp 184 struct lwp *curlwp = &lwp0; 185 #endif 186 struct proc *initproc; 187 188 struct vnode *rootvp, *swapdev_vp; 189 int boothowto; 190 int cold = 1; /* still working on startup */ 191 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 192 time_t rootfstime; /* recorded root fs time, if known */ 193 194 volatile int start_init_exec; /* semaphore for start_init() */ 195 196 static void check_console(struct lwp *l); 197 static void start_init(void *); 198 void main(void); 199 200 #if defined(__SSP__) || defined(__SSP_ALL__) 201 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 202 void __stack_chk_fail(void); 203 204 void 205 __stack_chk_fail(void) 206 { 207 panic("stack overflow detected; terminated"); 208 } 209 #endif 210 211 /* 212 * System startup; initialize the world, create process 0, mount root 213 * filesystem, and fork to create init and pagedaemon. Most of the 214 * hard work is done in the lower-level initialization routines including 215 * startup(), which does memory initialization and autoconfiguration. 216 */ 217 void 218 main(void) 219 { 220 #ifdef __HAVE_TIMECOUNTER 221 struct timeval time; 222 #endif 223 struct lwp *l; 224 struct proc *p; 225 struct pdevinit *pdev; 226 int s, error; 227 extern struct pdevinit pdevinit[]; 228 extern void schedcpu(void *); 229 #ifdef NVNODE_IMPLICIT 230 int usevnodes; 231 #endif 232 233 /* 234 * Initialize the current LWP pointer (curlwp) before 235 * any possible traps/probes to simplify trap processing. 236 */ 237 l = &lwp0; 238 curlwp = l; 239 l->l_cpu = curcpu(); 240 l->l_proc = &proc0; 241 l->l_lid = 1; 242 243 /* 244 * Attempt to find console and initialize 245 * in case of early panic or other messages. 246 */ 247 consinit(); 248 249 KERNEL_LOCK_INIT(); 250 251 uvm_init(); 252 253 kmem_init(); 254 255 /* Do machine-dependent initialization. */ 256 cpu_startup(); 257 258 /* Initialize callouts. */ 259 callout_startup(); 260 261 /* Initialize the buffer cache */ 262 bufinit(); 263 264 /* 265 * Initialize mbuf's. Do this now because we might attempt to 266 * allocate mbufs or mbuf clusters during autoconfiguration. 267 */ 268 mbinit(); 269 270 /* Initialize sockets. */ 271 soinit(); 272 273 #ifdef KCONT 274 /* Initialize kcont. */ 275 kcont_init(); 276 #endif 277 278 /* 279 * The following things must be done before autoconfiguration. 280 */ 281 evcnt_init(); /* initialize event counters */ 282 #if NRND > 0 283 rnd_init(); /* initialize RNG */ 284 #endif 285 /* Initialize the sysctl subsystem. */ 286 sysctl_init(); 287 288 /* Initialize process and pgrp structures. */ 289 procinit(); 290 lwpinit(); 291 292 /* Initialize signal-related data structures. */ 293 signal_init(); 294 295 /* Create process 0 (the swapper). */ 296 proc0_init(); 297 298 /* 299 * Charge root for one process. 300 */ 301 (void)chgproccnt(0, 1); 302 303 rqinit(); 304 305 /* Initialize I/O statistics. */ 306 iostat_init(); 307 308 /* Initialize the file systems. */ 309 #ifdef NVNODE_IMPLICIT 310 /* 311 * If maximum number of vnodes in namei vnode cache is not explicitly 312 * defined in kernel config, adjust the number such as we use roughly 313 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 314 */ 315 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 316 if (usevnodes > desiredvnodes) 317 desiredvnodes = usevnodes; 318 #endif 319 vfsinit(); 320 321 322 #ifdef __HAVE_TIMECOUNTER 323 inittimecounter(); 324 ntp_init(); 325 #endif /* __HAVE_TIMECOUNTER */ 326 327 /* Initialize kauth. */ 328 kauth_init(); 329 330 /* Configure the system hardware. This will enable interrupts. */ 331 configure(); 332 333 #if defined(__SSP__) || defined(__SSP_ALL__) 334 { 335 #ifdef DIAGNOSTIC 336 printf("Initializing SSP:"); 337 #endif 338 /* 339 * We initialize ssp here carefully: 340 * 1. after we got some entropy 341 * 2. without calling a function 342 */ 343 size_t i; 344 long guard[__arraycount(__stack_chk_guard)]; 345 346 arc4randbytes(guard, sizeof(guard)); 347 for (i = 0; i < __arraycount(guard); i++) 348 __stack_chk_guard[i] = guard[i]; 349 #ifdef DIAGNOSTIC 350 for (i = 0; i < __arraycount(guard); i++) 351 printf("%lx ", guard[i]); 352 printf("\n"); 353 #endif 354 } 355 #endif 356 ubc_init(); /* must be after autoconfig */ 357 358 /* Lock the kernel on behalf of proc0. */ 359 KERNEL_PROC_LOCK(l); 360 361 #ifdef SYSVSHM 362 /* Initialize System V style shared memory. */ 363 shminit(); 364 #endif 365 366 #ifdef SYSVSEM 367 /* Initialize System V style semaphores. */ 368 seminit(); 369 #endif 370 371 #ifdef SYSVMSG 372 /* Initialize System V style message queues. */ 373 msginit(); 374 #endif 375 376 #ifdef P1003_1B_SEMAPHORE 377 /* Initialize posix semaphores */ 378 ksem_init(); 379 #endif 380 381 /* Initialize default security model. */ 382 secmodel_start(); 383 384 #ifdef FILEASSOC 385 fileassoc_init(); 386 #endif /* FILEASSOC */ 387 388 #if NVERIEXEC > 0 389 /* 390 * Initialise the Veriexec subsystem. 391 */ 392 veriexec_init(); 393 #endif /* NVERIEXEC > 0 */ 394 395 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 396 pax_init(); 397 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 398 399 /* Attach pseudo-devices. */ 400 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 401 (*pdev->pdev_attach)(pdev->pdev_count); 402 403 #ifdef FAST_IPSEC 404 /* Attach network crypto subsystem */ 405 ipsec_attach(); 406 #endif 407 408 /* 409 * Initialize protocols. Block reception of incoming packets 410 * until everything is ready. 411 */ 412 s = splnet(); 413 ifinit(); 414 domaininit(); 415 if_attachdomain(); 416 splx(s); 417 418 #ifdef GPROF 419 /* Initialize kernel profiling. */ 420 kmstartup(); 421 #endif 422 423 /* Initialize system accouting. */ 424 acct_init(); 425 426 /* Kick off timeout driven events by calling first time. */ 427 schedcpu(NULL); 428 429 /* 430 * Create process 1 (init(8)). We do this now, as Unix has 431 * historically had init be process 1, and changing this would 432 * probably upset a lot of people. 433 * 434 * Note that process 1 won't immediately exec init(8), but will 435 * wait for us to inform it that the root file system has been 436 * mounted. 437 */ 438 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 439 panic("fork init"); 440 441 /* 442 * Create any kernel threads who's creation was deferred because 443 * initproc had not yet been created. 444 */ 445 kthread_run_deferred_queue(); 446 447 /* 448 * Now that device driver threads have been created, wait for 449 * them to finish any deferred autoconfiguration. Note we don't 450 * need to lock this semaphore, since we haven't booted any 451 * secondary processors, yet. 452 */ 453 while (config_pending) 454 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 455 456 /* 457 * Finalize configuration now that all real devices have been 458 * found. This needs to be done before the root device is 459 * selected, since finalization may create the root device. 460 */ 461 config_finalize(); 462 463 /* 464 * Now that autoconfiguration has completed, we can determine 465 * the root and dump devices. 466 */ 467 cpu_rootconf(); 468 cpu_dumpconf(); 469 470 /* Mount the root file system. */ 471 do { 472 domountroothook(); 473 if ((error = vfs_mountroot())) { 474 printf("cannot mount root, error = %d\n", error); 475 boothowto |= RB_ASKNAME; 476 setroot(root_device, 477 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 478 } 479 } while (error != 0); 480 mountroothook_destroy(); 481 482 /* 483 * Initialise the time-of-day clock, passing the time recorded 484 * in the root filesystem (if any) for use by systems that 485 * don't have a non-volatile time-of-day device. 486 */ 487 inittodr(rootfstime); 488 489 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 490 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 491 492 /* 493 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 494 * reference it. 495 */ 496 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 497 if (error) 498 panic("cannot find root vnode, error=%d", error); 499 cwdi0.cwdi_cdir = rootvnode; 500 VREF(cwdi0.cwdi_cdir); 501 VOP_UNLOCK(rootvnode, 0); 502 cwdi0.cwdi_rdir = NULL; 503 504 /* 505 * Now that root is mounted, we can fixup initproc's CWD 506 * info. All other processes are kthreads, which merely 507 * share proc0's CWD info. 508 */ 509 initproc->p_cwdi->cwdi_cdir = rootvnode; 510 VREF(initproc->p_cwdi->cwdi_cdir); 511 initproc->p_cwdi->cwdi_rdir = NULL; 512 513 /* 514 * Now can look at time, having had a chance to verify the time 515 * from the file system. Reset p->p_rtime as it may have been 516 * munched in mi_switch() after the time got set. 517 */ 518 proclist_lock_read(); 519 s = splsched(); 520 #ifdef __HAVE_TIMECOUNTER 521 getmicrotime(&time); 522 #else 523 mono_time = time; 524 #endif 525 boottime = time; 526 LIST_FOREACH(p, &allproc, p_list) { 527 KASSERT((p->p_flag & P_MARKER) == 0); 528 p->p_stats->p_start = time; 529 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 530 if (l->l_cpu != NULL) 531 l->l_cpu->ci_schedstate.spc_runtime = time; 532 } 533 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 534 } 535 splx(s); 536 proclist_unlock_read(); 537 538 /* Create the pageout daemon kernel thread. */ 539 uvm_swap_init(); 540 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 541 panic("fork pagedaemon"); 542 543 /* Create the filesystem syncer kernel thread. */ 544 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 545 panic("fork syncer"); 546 547 /* Create the aiodone daemon kernel thread. */ 548 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 549 "aiodoned")) 550 panic("fork aiodoned"); 551 552 #if defined(MULTIPROCESSOR) 553 /* Boot the secondary processors. */ 554 cpu_boot_secondary_processors(); 555 #endif 556 557 /* Initialize exec structures */ 558 exec_init(1); 559 560 /* 561 * Okay, now we can let init(8) exec! It's off to userland! 562 */ 563 start_init_exec = 1; 564 wakeup(&start_init_exec); 565 566 /* The scheduler is an infinite loop. */ 567 uvm_scheduler(); 568 /* NOTREACHED */ 569 } 570 571 void 572 setrootfstime(time_t t) 573 { 574 rootfstime = t; 575 } 576 577 static void 578 check_console(struct lwp *l) 579 { 580 struct nameidata nd; 581 int error; 582 583 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 584 error = namei(&nd); 585 if (error == 0) 586 vrele(nd.ni_vp); 587 else if (error == ENOENT) 588 printf("warning: no /dev/console\n"); 589 else 590 printf("warning: lookup /dev/console: error %d\n", error); 591 } 592 593 /* 594 * List of paths to try when searching for "init". 595 */ 596 static const char *initpaths[] = { 597 "/sbin/init", 598 "/sbin/oinit", 599 "/sbin/init.bak", 600 NULL, 601 }; 602 603 /* 604 * Start the initial user process; try exec'ing each pathname in "initpaths". 605 * The program is invoked with one argument containing the boot flags. 606 */ 607 static void 608 start_init(void *arg) 609 { 610 struct lwp *l = arg; 611 struct proc *p = l->l_proc; 612 vaddr_t addr; 613 struct sys_execve_args /* { 614 syscallarg(const char *) path; 615 syscallarg(char * const *) argp; 616 syscallarg(char * const *) envp; 617 } */ args; 618 int options, i, error; 619 register_t retval[2]; 620 char flags[4], *flagsp; 621 const char *path, *slash; 622 char *ucp, **uap, *arg0, *arg1 = NULL; 623 char ipath[129]; 624 int ipx, len; 625 626 /* 627 * Now in process 1. 628 */ 629 strncpy(p->p_comm, "init", MAXCOMLEN); 630 631 /* 632 * Wait for main() to tell us that it's safe to exec. 633 */ 634 while (start_init_exec == 0) 635 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 636 637 /* 638 * This is not the right way to do this. We really should 639 * hand-craft a descriptor onto /dev/console to hand to init, 640 * but that's a _lot_ more work, and the benefit from this easy 641 * hack makes up for the "good is the enemy of the best" effect. 642 */ 643 check_console(l); 644 645 /* 646 * Need just enough stack to hold the faked-up "execve()" arguments. 647 */ 648 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 649 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 650 NULL, UVM_UNKNOWN_OFFSET, 0, 651 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 652 UVM_ADV_NORMAL, 653 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 654 panic("init: couldn't allocate argument space"); 655 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 656 657 ipx = 0; 658 while (1) { 659 if (boothowto & RB_ASKNAME) { 660 printf("init path"); 661 if (initpaths[ipx]) 662 printf(" (default %s)", initpaths[ipx]); 663 printf(": "); 664 len = cngetsn(ipath, sizeof(ipath)-1); 665 if (len == 0) { 666 if (initpaths[ipx]) 667 path = initpaths[ipx++]; 668 else 669 continue; 670 } else { 671 ipath[len] = '\0'; 672 path = ipath; 673 } 674 } else { 675 if ((path = initpaths[ipx++]) == NULL) 676 break; 677 } 678 679 ucp = (char *)USRSTACK; 680 681 /* 682 * Construct the boot flag argument. 683 */ 684 flagsp = flags; 685 *flagsp++ = '-'; 686 options = 0; 687 688 if (boothowto & RB_SINGLE) { 689 *flagsp++ = 's'; 690 options = 1; 691 } 692 #ifdef notyet 693 if (boothowto & RB_FASTBOOT) { 694 *flagsp++ = 'f'; 695 options = 1; 696 } 697 #endif 698 699 /* 700 * Move out the flags (arg 1), if necessary. 701 */ 702 if (options != 0) { 703 *flagsp++ = '\0'; 704 i = flagsp - flags; 705 #ifdef DEBUG 706 printf("init: copying out flags `%s' %d\n", flags, i); 707 #endif 708 arg1 = STACK_ALLOC(ucp, i); 709 ucp = STACK_MAX(arg1, i); 710 (void)copyout((caddr_t)flags, arg1, i); 711 } 712 713 /* 714 * Move out the file name (also arg 0). 715 */ 716 i = strlen(path) + 1; 717 #ifdef DEBUG 718 printf("init: copying out path `%s' %d\n", path, i); 719 #else 720 if (boothowto & RB_ASKNAME || path != initpaths[0]) 721 printf("init: trying %s\n", path); 722 #endif 723 arg0 = STACK_ALLOC(ucp, i); 724 ucp = STACK_MAX(arg0, i); 725 (void)copyout(path, arg0, i); 726 727 /* 728 * Move out the arg pointers. 729 */ 730 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 731 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 732 SCARG(&args, path) = arg0; 733 SCARG(&args, argp) = uap; 734 SCARG(&args, envp) = NULL; 735 slash = strrchr(path, '/'); 736 if (slash) 737 (void)suword((caddr_t)uap++, 738 (long)arg0 + (slash + 1 - path)); 739 else 740 (void)suword((caddr_t)uap++, (long)arg0); 741 if (options != 0) 742 (void)suword((caddr_t)uap++, (long)arg1); 743 (void)suword((caddr_t)uap++, 0); /* terminator */ 744 745 /* 746 * Now try to exec the program. If can't for any reason 747 * other than it doesn't exist, complain. 748 */ 749 error = sys_execve(l, &args, retval); 750 if (error == 0 || error == EJUSTRETURN) { 751 KERNEL_PROC_UNLOCK(l); 752 return; 753 } 754 printf("exec %s: error %d\n", path, error); 755 } 756 printf("init: not found\n"); 757 panic("no init"); 758 } 759
Indexes created Wed Sep 24 05:09:52 GMT 2025