1 /* $OpenBSD: init_main.c,v 1.282 2019/01/01 07:06:44 jsg Exp $ */ 2 /* $NetBSD: init_main.c,v 1.84.4.1 1996/06/02 09:08:06 mrg Exp $ */ 3 4 /* 5 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * (c) UNIX System Laboratories, Inc. 9 * All or some portions of this file are derived from material licensed 10 * to the University of California by American Telephone and Telegraph 11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 12 * the permission of UNIX System Laboratories, Inc. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 39 */ 40 41 #include <sys/param.h> 42 #include <sys/filedesc.h> 43 #include <sys/file.h> 44 #include <sys/errno.h> 45 #include <sys/exec.h> 46 #include <sys/kernel.h> 47 #include <sys/kthread.h> 48 #include <sys/mount.h> 49 #include <sys/proc.h> 50 #include <sys/resourcevar.h> 51 #include <sys/signalvar.h> 52 #include <sys/systm.h> 53 #include <sys/namei.h> 54 #include <sys/vnode.h> 55 #include <sys/tty.h> 56 #include <sys/conf.h> 57 #include <sys/buf.h> 58 #include <sys/device.h> 59 #include <sys/socketvar.h> 60 #include <sys/lockf.h> 61 #include <sys/protosw.h> 62 #include <sys/reboot.h> 63 #include <sys/user.h> 64 #ifdef SYSVSHM 65 #include <sys/shm.h> 66 #endif 67 #ifdef SYSVSEM 68 #include <sys/sem.h> 69 #endif 70 #ifdef SYSVMSG 71 #include <sys/msg.h> 72 #endif 73 #include <sys/domain.h> 74 #include <sys/msgbuf.h> 75 #include <sys/mbuf.h> 76 #include <sys/pipe.h> 77 #include <sys/task.h> 78 #include <sys/witness.h> 79 80 #include <sys/syscall.h> 81 #include <sys/syscallargs.h> 82 83 #include <uvm/uvm_extern.h> 84 85 #include <dev/rndvar.h> 86 87 #include <ufs/ufs/quota.h> 88 89 #include <net/if.h> 90 #include <net/rtable.h> 91 #include <net/netisr.h> 92 93 #if defined(CRYPTO) 94 #include <crypto/cryptodev.h> 95 #include <crypto/cryptosoft.h> 96 #endif 97 98 #if defined(NFSSERVER) || defined(NFSCLIENT) 99 extern void nfs_init(void); 100 #endif 101 102 #include "mpath.h" 103 #include "vscsi.h" 104 #include "softraid.h" 105 106 const char copyright[] = 107 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 108 "\tThe Regents of the University of California. All rights reserved.\n" 109 "Copyright (c) 1995-2019 OpenBSD. All rights reserved. https://www.OpenBSD.org\n"; 110 111 /* Components of the first process -- never freed. */ 112 struct session session0; 113 struct pgrp pgrp0; 114 struct proc proc0; 115 struct process process0; 116 struct plimit limit0; 117 struct vmspace vmspace0; 118 struct sigacts sigacts0; 119 struct process *initprocess; 120 struct proc *reaperproc; 121 122 extern struct user *proc0paddr; 123 124 struct vnode *rootvp, *swapdev_vp; 125 int boothowto; 126 struct timespec boottime; 127 int db_active = 0; 128 int ncpus = 1; 129 int ncpusfound = 1; /* number of cpus we find */ 130 volatile int start_init_exec; /* semaphore for start_init() */ 131 132 #if !defined(NO_PROPOLICE) 133 long __guard_local __attribute__((section(".openbsd.randomdata"))); 134 #endif 135 136 /* XXX return int so gcc -Werror won't complain */ 137 int main(void *); 138 void check_console(struct proc *); 139 void start_init(void *); 140 void crypto_init(void); 141 void db_ctf_init(void); 142 void prof_init(void); 143 void init_exec(void); 144 void kqueue_init(void); 145 void futex_init(void); 146 void taskq_init(void); 147 void timeout_proc_init(void); 148 void pool_gc_pages(void *); 149 void percpu_init(void); 150 151 extern char sigcode[], esigcode[], sigcoderet[]; 152 #ifdef SYSCALL_DEBUG 153 extern char *syscallnames[]; 154 #endif 155 156 struct emul emul_native = { 157 "native", 158 NULL, 159 SYS_syscall, 160 SYS_MAXSYSCALL, 161 sysent, 162 #ifdef SYSCALL_DEBUG 163 syscallnames, 164 #else 165 NULL, 166 #endif 167 0, 168 copyargs, 169 setregs, 170 NULL, /* fixup */ 171 NULL, /* coredump */ 172 sigcode, 173 esigcode, 174 sigcoderet 175 }; 176 177 #ifdef DIAGNOSTIC 178 int pdevinit_done = 0; 179 #endif 180 181 /* 182 * System startup; initialize the world, create process 0, mount root 183 * filesystem, and fork to create init and pagedaemon. Most of the 184 * hard work is done in the lower-level initialization routines including 185 * startup(), which does memory initialization and autoconfiguration. 186 */ 187 /* XXX return int, so gcc -Werror won't complain */ 188 int 189 main(void *framep) 190 { 191 struct proc *p; 192 struct process *pr; 193 struct pdevinit *pdev; 194 quad_t lim; 195 int i; 196 extern struct pdevinit pdevinit[]; 197 extern void disk_init(void); 198 199 /* 200 * Initialize the current process pointer (curproc) before 201 * any possible traps/probes to simplify trap processing. 202 */ 203 curproc = p = &proc0; 204 p->p_cpu = curcpu(); 205 206 /* 207 * Initialize timeouts. 208 */ 209 timeout_startup(); 210 211 /* 212 * Attempt to find console and initialize 213 * in case of early panic or other messages. 214 */ 215 config_init(); /* init autoconfiguration data structures */ 216 consinit(); 217 218 printf("%s\n", copyright); 219 220 WITNESS_INITIALIZE(); 221 222 KERNEL_LOCK_INIT(); 223 SCHED_LOCK_INIT(); 224 225 uvm_init(); 226 disk_init(); /* must come before autoconfiguration */ 227 tty_init(); /* initialise tty's */ 228 cpu_startup(); 229 230 random_start(); /* Start the flow */ 231 232 /* 233 * Initialize mbuf's. Do this now because we might attempt to 234 * allocate mbufs or mbuf clusters during autoconfiguration. 235 */ 236 mbinit(); 237 238 /* Initialize sockets. */ 239 soinit(); 240 241 /* Initialize SRP subsystem. */ 242 srp_startup(); 243 244 /* 245 * Initialize process and pgrp structures. 246 */ 247 procinit(); 248 249 /* Initialize file locking. */ 250 lf_init(); 251 252 /* 253 * Initialize filedescriptors. 254 */ 255 filedesc_init(); 256 257 /* 258 * Initialize pipes. 259 */ 260 pipe_init(); 261 262 /* 263 * Initialize kqueues. 264 */ 265 kqueue_init(); 266 267 /* 268 * Initialize futexes. 269 */ 270 futex_init(); 271 272 /* Create credentials. */ 273 p->p_ucred = crget(); 274 p->p_ucred->cr_ngroups = 1; /* group 0 */ 275 276 /* 277 * Create process 0 (the swapper). 278 */ 279 pr = &process0; 280 process_initialize(pr, p); 281 282 LIST_INSERT_HEAD(&allprocess, pr, ps_list); 283 LIST_INSERT_HEAD(PIDHASH(0), pr, ps_hash); 284 atomic_setbits_int(&pr->ps_flags, PS_SYSTEM); 285 286 /* Set the default routing table/domain. */ 287 process0.ps_rtableid = 0; 288 289 LIST_INSERT_HEAD(&allproc, p, p_list); 290 pr->ps_pgrp = &pgrp0; 291 LIST_INSERT_HEAD(TIDHASH(0), p, p_hash); 292 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 293 LIST_INIT(&pgrp0.pg_members); 294 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 295 296 pgrp0.pg_session = &session0; 297 session0.s_count = 1; 298 session0.s_leader = pr; 299 300 atomic_setbits_int(&p->p_flag, P_SYSTEM); 301 p->p_stat = SONPROC; 302 pr->ps_nice = NZERO; 303 pr->ps_emul = &emul_native; 304 strlcpy(pr->ps_comm, "swapper", sizeof(pr->ps_comm)); 305 306 /* Init timeouts. */ 307 timeout_set(&p->p_sleep_to, endtsleep, p); 308 309 /* Initialize signal state for process 0. */ 310 signal_init(); 311 pr->ps_sigacts = &sigacts0; 312 siginit(pr); 313 314 /* Create the file descriptor table. */ 315 p->p_fd = pr->ps_fd = fdinit(); 316 317 /* Create the limits structures. */ 318 pr->ps_limit = &limit0; 319 for (i = 0; i < nitems(p->p_rlimit); i++) 320 limit0.pl_rlimit[i].rlim_cur = 321 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 322 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 323 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 324 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 325 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 326 lim = ptoa(uvmexp.free); 327 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 328 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 329 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 330 limit0.p_refcnt = 1; 331 332 /* Allocate a prototype map so we have something to fork. */ 333 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 334 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 335 p->p_vmspace = pr->ps_vmspace = &vmspace0; 336 337 p->p_addr = proc0paddr; /* XXX */ 338 339 /* 340 * Charge root for one process. 341 */ 342 (void)chgproccnt(0, 1); 343 344 /* Initialize run queues */ 345 sched_init_runqueues(); 346 sleep_queue_init(); 347 sched_init_cpu(curcpu()); 348 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 349 350 /* Initialize timeouts in process context. */ 351 timeout_proc_init(); 352 353 /* Initialize task queues */ 354 taskq_init(); 355 356 /* Initialize the interface/address trees */ 357 ifinit(); 358 359 /* Lock the kernel on behalf of proc0. */ 360 KERNEL_LOCK(); 361 362 #if NMPATH > 0 363 /* Attach mpath before hardware */ 364 config_rootfound("mpath", NULL); 365 #endif 366 367 /* Configure the devices */ 368 cpu_configure(); 369 370 /* Configure virtual memory system, set vm rlimits. */ 371 uvm_init_limits(p); 372 373 /* Per CPU memory allocation */ 374 percpu_init(); 375 376 /* Initialize the file systems. */ 377 #if defined(NFSSERVER) || defined(NFSCLIENT) 378 nfs_init(); /* initialize server/shared data */ 379 #endif 380 vfsinit(); 381 382 /* Start real time and statistics clocks. */ 383 initclocks(); 384 385 #ifdef SYSVSHM 386 /* Initialize System V style shared memory. */ 387 shminit(); 388 #endif 389 390 #ifdef SYSVSEM 391 /* Initialize System V style semaphores. */ 392 seminit(); 393 #endif 394 395 #ifdef SYSVMSG 396 /* Initialize System V style message queues. */ 397 msginit(); 398 #endif 399 400 /* Create default routing table before attaching lo0. */ 401 rtable_init(); 402 403 /* Attach pseudo-devices. */ 404 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 405 if (pdev->pdev_count > 0) 406 (*pdev->pdev_attach)(pdev->pdev_count); 407 #ifdef DIAGNOSTIC 408 pdevinit_done = 1; 409 #endif 410 411 #ifdef CRYPTO 412 crypto_init(); 413 swcr_init(); 414 #endif /* CRYPTO */ 415 416 /* 417 * Initialize protocols. 418 */ 419 domaininit(); 420 421 initconsbuf(); 422 423 #if defined(GPROF) || defined(DDBPROF) 424 /* Initialize kernel profiling. */ 425 prof_init(); 426 #endif 427 428 mbcpuinit(); /* enable per cpu mbuf data */ 429 430 /* init exec and emul */ 431 init_exec(); 432 433 /* Start the scheduler */ 434 scheduler_start(); 435 436 /* 437 * Create process 1 (init(8)). We do this now, as Unix has 438 * historically had init be process 1, and changing this would 439 * probably upset a lot of people. 440 * 441 * Note that process 1 won't immediately exec init(8), but will 442 * wait for us to inform it that the root file system has been 443 * mounted. 444 */ 445 { 446 struct proc *initproc; 447 448 if (fork1(p, FORK_FORK, start_init, NULL, NULL, &initproc)) 449 panic("fork init"); 450 initprocess = initproc->p_p; 451 } 452 453 randompid = 1; 454 455 /* 456 * Create any kernel threads whose creation was deferred because 457 * initprocess had not yet been created. 458 */ 459 kthread_run_deferred_queue(); 460 461 /* 462 * Now that device driver threads have been created, wait for 463 * them to finish any deferred autoconfiguration. Note we don't 464 * need to lock this semaphore, since we haven't booted any 465 * secondary processors, yet. 466 */ 467 while (config_pending) 468 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 469 470 dostartuphooks(); 471 472 #if NVSCSI > 0 473 config_rootfound("vscsi", NULL); 474 #endif 475 #if NSOFTRAID > 0 476 config_rootfound("softraid", NULL); 477 #endif 478 479 /* Configure root/swap devices */ 480 diskconf(); 481 482 #ifdef DDB 483 /* Make debug symbols available in ddb. */ 484 db_ctf_init(); 485 #endif 486 487 if (mountroot == NULL || ((*mountroot)() != 0)) 488 panic("cannot mount root"); 489 490 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 491 492 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 493 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 494 panic("cannot find root vnode"); 495 p->p_fd->fd_cdir = rootvnode; 496 vref(p->p_fd->fd_cdir); 497 VOP_UNLOCK(rootvnode); 498 p->p_fd->fd_rdir = NULL; 499 500 /* 501 * Now that root is mounted, we can fixup initprocess's CWD 502 * info. All other processes are kthreads, which merely 503 * share proc0's CWD info. 504 */ 505 initprocess->ps_fd->fd_cdir = rootvnode; 506 vref(initprocess->ps_fd->fd_cdir); 507 initprocess->ps_fd->fd_rdir = NULL; 508 509 /* 510 * Now can look at time, having had a chance to verify the time 511 * from the file system. Reset p->p_rtime as it may have been 512 * munched in mi_switch() after the time got set. 513 */ 514 nanotime(&boottime); 515 LIST_FOREACH(pr, &allprocess, ps_list) { 516 pr->ps_start = boottime; 517 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 518 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 519 timespecclear(&p->p_rtime); 520 } 521 } 522 523 uvm_swap_init(); 524 525 /* Create the pageout daemon kernel thread. */ 526 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 527 panic("fork pagedaemon"); 528 529 /* Create the reaper daemon kernel thread. */ 530 if (kthread_create(reaper, NULL, &reaperproc, "reaper")) 531 panic("fork reaper"); 532 533 /* Create the cleaner daemon kernel thread. */ 534 if (kthread_create(buf_daemon, NULL, &cleanerproc, "cleaner")) 535 panic("fork cleaner"); 536 537 /* Create the update daemon kernel thread. */ 538 if (kthread_create(syncer_thread, NULL, &syncerproc, "update")) 539 panic("fork update"); 540 541 /* Create the aiodone daemon kernel thread. */ 542 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 543 panic("fork aiodoned"); 544 545 #if !defined(__hppa__) 546 /* Create the page zeroing kernel thread. */ 547 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 548 panic("fork zerothread"); 549 #endif 550 551 #if defined(MULTIPROCESSOR) 552 /* Boot the secondary processors. */ 553 cpu_boot_secondary_processors(); 554 #endif 555 556 config_process_deferred_mountroot(); 557 558 /* 559 * Okay, now we can let init(8) exec! It's off to userland! 560 */ 561 start_init_exec = 1; 562 wakeup((void *)&start_init_exec); 563 564 /* 565 * Start the idle pool page garbage collector 566 */ 567 #if !(defined(__m88k__) && defined(MULTIPROCESSOR)) /* XXX */ 568 pool_gc_pages(NULL); 569 #endif 570 571 start_periodic_resettodr(); 572 573 /* 574 * proc0: nothing to do, back to sleep 575 */ 576 while (1) 577 tsleep(&proc0, PVM, "scheduler", 0); 578 /* NOTREACHED */ 579 } 580 581 /* 582 * List of paths to try when searching for "init". 583 */ 584 static char *initpaths[] = { 585 "/sbin/init", 586 "/sbin/oinit", 587 "/sbin/init.bak", 588 NULL, 589 }; 590 591 void 592 check_console(struct proc *p) 593 { 594 struct nameidata nd; 595 int error; 596 597 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 598 error = namei(&nd); 599 if (error) { 600 if (error == ENOENT) 601 printf("warning: /dev/console does not exist\n"); 602 else 603 printf("warning: /dev/console error %d\n", error); 604 } else 605 vrele(nd.ni_vp); 606 } 607 608 /* 609 * Start the initial user process; try exec'ing each pathname in "initpaths". 610 * The program is invoked with one argument containing the boot flags. 611 */ 612 void 613 start_init(void *arg) 614 { 615 struct proc *p = arg; 616 vaddr_t addr; 617 struct sys_execve_args /* { 618 syscallarg(const char *) path; 619 syscallarg(char *const *) argp; 620 syscallarg(char *const *) envp; 621 } */ args; 622 int options, error; 623 long i; 624 register_t retval[2]; 625 char flags[4], *flagsp; 626 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 627 628 /* 629 * Now in process 1. 630 */ 631 632 /* 633 * Wait for main() to tell us that it's safe to exec. 634 */ 635 while (start_init_exec == 0) 636 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 637 638 check_console(p); 639 640 /* process 0 ignores SIGCHLD, but we can't */ 641 p->p_p->ps_sigacts->ps_flags = 0; 642 643 /* 644 * Need just enough stack to hold the faked-up "execve()" arguments. 645 */ 646 #ifdef MACHINE_STACK_GROWS_UP 647 addr = USRSTACK; 648 #else 649 addr = USRSTACK - PAGE_SIZE; 650 #endif 651 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 652 p->p_vmspace->vm_minsaddr = (caddr_t)(addr + PAGE_SIZE); 653 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 654 NULL, UVM_UNKNOWN_OFFSET, 0, 655 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, MAP_INHERIT_COPY, 656 MADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW|UVM_FLAG_STACK))) 657 panic("init: couldn't allocate argument space"); 658 659 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 660 #ifdef MACHINE_STACK_GROWS_UP 661 ucp = (char *)addr; 662 #else 663 ucp = (char *)(addr + PAGE_SIZE); 664 #endif 665 /* 666 * Construct the boot flag argument. 667 */ 668 flagsp = flags; 669 *flagsp++ = '-'; 670 options = 0; 671 672 if (boothowto & RB_SINGLE) { 673 *flagsp++ = 's'; 674 options = 1; 675 } 676 #ifdef notyet 677 if (boothowto & RB_FASTBOOT) { 678 *flagsp++ = 'f'; 679 options = 1; 680 } 681 #endif 682 683 /* 684 * Move out the flags (arg 1), if necessary. 685 */ 686 if (options != 0) { 687 *flagsp++ = '\0'; 688 i = flagsp - flags; 689 #ifdef DEBUG 690 printf("init: copying out flags `%s' %ld\n", flags, i); 691 #endif 692 #ifdef MACHINE_STACK_GROWS_UP 693 arg1 = ucp; 694 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 695 ucp += i; 696 #else 697 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 698 arg1 = ucp; 699 #endif 700 } 701 702 /* 703 * Move out the file name (also arg 0). 704 */ 705 i = strlen(path) + 1; 706 #ifdef DEBUG 707 printf("init: copying out path `%s' %ld\n", path, i); 708 #endif 709 #ifdef MACHINE_STACK_GROWS_UP 710 arg0 = ucp; 711 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 712 ucp += i; 713 ucp = (caddr_t)ALIGN((u_long)ucp); 714 uap = (char **)ucp + 3; 715 #else 716 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 717 arg0 = ucp; 718 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 719 #endif 720 721 /* 722 * Move out the arg pointers. 723 */ 724 i = 0; 725 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 726 if (options != 0) 727 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 728 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 729 730 /* 731 * Point at the arguments. 732 */ 733 SCARG(&args, path) = arg0; 734 SCARG(&args, argp) = uap; 735 SCARG(&args, envp) = NULL; 736 737 /* 738 * Now try to exec the program. If can't for any reason 739 * other than it doesn't exist, complain. 740 */ 741 if ((error = sys_execve(p, &args, retval)) == 0) { 742 KERNEL_UNLOCK(); 743 return; 744 } 745 if (error != ENOENT) 746 printf("exec %s: error %d\n", path, error); 747 } 748 printf("init: not found\n"); 749 panic("no init"); 750 } 751