1 /* $OpenBSD: init_main.c,v 1.308 2021/06/30 12:21:02 bluhm 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/event.h> 75 #include <sys/msgbuf.h> 76 #include <sys/mbuf.h> 77 #include <sys/pipe.h> 78 #include <sys/task.h> 79 #include <sys/witness.h> 80 #include <sys/smr.h> 81 82 #include <sys/syscall.h> 83 #include <sys/syscallargs.h> 84 85 #include <uvm/uvm_extern.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(KUBSAN) 99 extern void kubsan_init(void); 100 #endif 101 102 #if defined(NFSSERVER) || defined(NFSCLIENT) 103 extern void nfs_init(void); 104 #endif 105 106 #include "stoeplitz.h" 107 #if NSTOEPLITZ > 0 108 extern void stoeplitz_init(void); 109 #endif 110 111 #include "mpath.h" 112 #include "vscsi.h" 113 #include "softraid.h" 114 115 const char copyright[] = 116 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 117 "\tThe Regents of the University of California. All rights reserved.\n" 118 "Copyright (c) 1995-2021 OpenBSD. All rights reserved. https://www.OpenBSD.org\n"; 119 120 /* Components of the first process -- never freed. */ 121 struct session session0; 122 struct pgrp pgrp0; 123 struct proc proc0; 124 struct process process0; 125 struct plimit limit0; 126 struct vmspace vmspace0; 127 struct sigacts sigacts0; 128 struct process *initprocess; 129 struct proc *reaperproc; 130 131 extern struct user *proc0paddr; 132 133 struct vnode *rootvp, *swapdev_vp; 134 int boothowto; 135 int db_active = 0; 136 int ncpus = 1; 137 int ncpusfound = 1; /* number of cpus we find */ 138 volatile int start_init_exec; /* semaphore for start_init() */ 139 140 #if !defined(NO_PROPOLICE) 141 long __guard_local __attribute__((section(".openbsd.randomdata"))); 142 #endif 143 144 /* XXX return int so gcc -Werror won't complain */ 145 int main(void *); 146 void check_console(struct proc *); 147 void start_init(void *); 148 void db_ctf_init(void); 149 void prof_init(void); 150 void init_exec(void); 151 void futex_init(void); 152 void taskq_init(void); 153 void timeout_proc_init(void); 154 void pool_gc_pages(void *); 155 void percpu_init(void); 156 157 extern char sigcode[], esigcode[], sigcoderet[]; 158 #ifdef SYSCALL_DEBUG 159 extern char *syscallnames[]; 160 #endif 161 162 struct emul emul_native = { 163 "native", 164 NULL, 165 SYS_syscall, 166 SYS_MAXSYSCALL, 167 sysent, 168 #ifdef SYSCALL_DEBUG 169 syscallnames, 170 #else 171 NULL, 172 #endif 173 0, 174 copyargs, 175 setregs, 176 NULL, /* fixup */ 177 NULL, /* coredump */ 178 sigcode, 179 esigcode, 180 sigcoderet 181 }; 182 183 #ifdef DIAGNOSTIC 184 int pdevinit_done = 0; 185 #endif 186 187 /* 188 * System startup; initialize the world, create process 0, mount root 189 * filesystem, and fork to create init and pagedaemon. Most of the 190 * hard work is done in the lower-level initialization routines including 191 * startup(), which does memory initialization and autoconfiguration. 192 */ 193 /* XXX return int, so gcc -Werror won't complain */ 194 int 195 main(void *framep) 196 { 197 struct proc *p; 198 struct process *pr; 199 struct pdevinit *pdev; 200 extern struct pdevinit pdevinit[]; 201 extern void disk_init(void); 202 203 /* 204 * Initialize the current process pointer (curproc) before 205 * any possible traps/probes to simplify trap processing. 206 */ 207 curproc = p = &proc0; 208 p->p_cpu = curcpu(); 209 210 /* 211 * Initialize timeouts. 212 */ 213 timeout_startup(); 214 215 /* 216 * Attempt to find console and initialize 217 * in case of early panic or other messages. 218 */ 219 config_init(); /* init autoconfiguration data structures */ 220 consinit(); 221 222 printf("%s\n", copyright); 223 224 #ifdef KUBSAN 225 /* Initialize kubsan. */ 226 kubsan_init(); 227 #endif 228 229 WITNESS_INITIALIZE(); 230 231 KERNEL_LOCK_INIT(); 232 SCHED_LOCK_INIT(); 233 234 rw_obj_init(); 235 uvm_init(); 236 disk_init(); /* must come before autoconfiguration */ 237 tty_init(); /* initialise tty's */ 238 cpu_startup(); 239 240 random_start(boothowto & RB_GOODRANDOM); /* Start the flow */ 241 242 /* 243 * Initialize mbuf's. Do this now because we might attempt to 244 * allocate mbufs or mbuf clusters during autoconfiguration. 245 */ 246 mbinit(); 247 248 #if NSTOEPLITZ > 0 249 stoeplitz_init(); 250 #endif 251 252 /* Initialize sockets. */ 253 soinit(); 254 255 /* Initialize SRP subsystem. */ 256 srp_startup(); 257 258 /* Initialize SMR subsystem. */ 259 smr_startup(); 260 261 /* 262 * Initialize process and pgrp structures. 263 */ 264 procinit(); 265 266 /* Initialize file locking. */ 267 lf_init(); 268 269 /* 270 * Initialize filedescriptors. 271 */ 272 filedesc_init(); 273 274 /* 275 * Initialize pipes. 276 */ 277 pipe_init(); 278 279 /* 280 * Initialize kqueues. 281 */ 282 kqueue_init(); 283 284 /* 285 * Initialize futexes. 286 */ 287 futex_init(); 288 289 /* Create credentials. */ 290 p->p_ucred = crget(); 291 p->p_ucred->cr_ngroups = 1; /* group 0 */ 292 293 /* 294 * Create process 0 (the swapper). 295 */ 296 pr = &process0; 297 process_initialize(pr, p); 298 299 LIST_INSERT_HEAD(&allprocess, pr, ps_list); 300 LIST_INSERT_HEAD(PIDHASH(0), pr, ps_hash); 301 atomic_setbits_int(&pr->ps_flags, PS_SYSTEM); 302 303 /* Set the default routing table/domain. */ 304 process0.ps_rtableid = 0; 305 306 LIST_INSERT_HEAD(&allproc, p, p_list); 307 pr->ps_pgrp = &pgrp0; 308 LIST_INSERT_HEAD(TIDHASH(0), p, p_hash); 309 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 310 LIST_INIT(&pgrp0.pg_members); 311 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 312 313 pgrp0.pg_session = &session0; 314 session0.s_count = 1; 315 session0.s_leader = pr; 316 317 atomic_setbits_int(&p->p_flag, P_SYSTEM); 318 p->p_stat = SONPROC; 319 pr->ps_nice = NZERO; 320 pr->ps_emul = &emul_native; 321 strlcpy(pr->ps_comm, "swapper", sizeof(pr->ps_comm)); 322 323 /* Init timeouts. */ 324 timeout_set(&p->p_sleep_to, endtsleep, p); 325 326 /* Initialize signal state for process 0. */ 327 signal_init(); 328 siginit(&sigacts0); 329 pr->ps_sigacts = &sigacts0; 330 331 /* Create the file descriptor table. */ 332 p->p_fd = pr->ps_fd = fdinit(); 333 334 /* Create the limits structures. */ 335 lim_startup(&limit0); 336 pr->ps_limit = &limit0; 337 338 /* Allocate a prototype map so we have something to fork. */ 339 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 340 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 341 p->p_vmspace = pr->ps_vmspace = &vmspace0; 342 343 p->p_addr = proc0paddr; /* XXX */ 344 345 /* 346 * Charge root for one process. 347 */ 348 (void)chgproccnt(0, 1); 349 350 /* Initialize run queues */ 351 sched_init_runqueues(); 352 sleep_queue_init(); 353 sched_init_cpu(curcpu()); 354 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 355 356 /* Initialize timeouts in process context. */ 357 timeout_proc_init(); 358 359 /* Initialize task queues */ 360 taskq_init(); 361 362 /* Initialize the interface/address trees */ 363 ifinit(); 364 365 /* Lock the kernel on behalf of proc0. */ 366 KERNEL_LOCK(); 367 368 #if NMPATH > 0 369 /* Attach mpath before hardware */ 370 config_rootfound("mpath", NULL); 371 #endif 372 373 /* Configure the devices */ 374 cpu_configure(); 375 376 /* Configure virtual memory system, set vm rlimits. */ 377 uvm_init_limits(&limit0); 378 379 /* Per CPU memory allocation */ 380 percpu_init(); 381 382 /* Initialize the file systems. */ 383 #if defined(NFSSERVER) || defined(NFSCLIENT) 384 nfs_init(); /* initialize server/shared data */ 385 #endif 386 vfsinit(); 387 388 /* Start real time and statistics clocks. */ 389 initclocks(); 390 391 #ifdef SYSVSHM 392 /* Initialize System V style shared memory. */ 393 shminit(); 394 #endif 395 396 #ifdef SYSVSEM 397 /* Initialize System V style semaphores. */ 398 seminit(); 399 #endif 400 401 #ifdef SYSVMSG 402 /* Initialize System V style message queues. */ 403 msginit(); 404 #endif 405 406 /* Create default routing table before attaching lo0. */ 407 rtable_init(); 408 409 /* Attach pseudo-devices. */ 410 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 411 if (pdev->pdev_count > 0) 412 (*pdev->pdev_attach)(pdev->pdev_count); 413 #ifdef DIAGNOSTIC 414 pdevinit_done = 1; 415 #endif 416 417 #ifdef CRYPTO 418 crypto_init(); 419 swcr_init(); 420 #endif /* CRYPTO */ 421 422 /* 423 * Initialize protocols. 424 */ 425 domaininit(); 426 427 initconsbuf(); 428 429 #if defined(GPROF) || defined(DDBPROF) 430 /* Initialize kernel profiling. */ 431 prof_init(); 432 #endif 433 434 /* Enable per-CPU data. */ 435 mbcpuinit(); 436 kqueue_init_percpu(); 437 uvm_init_percpu(); 438 439 /* init exec and emul */ 440 init_exec(); 441 442 /* Start the scheduler */ 443 scheduler_start(); 444 445 /* 446 * Create process 1 (init(8)). We do this now, as Unix has 447 * historically had init be process 1, and changing this would 448 * probably upset a lot of people. 449 * 450 * Note that process 1 won't immediately exec init(8), but will 451 * wait for us to inform it that the root file system has been 452 * mounted. 453 */ 454 { 455 struct proc *initproc; 456 457 if (fork1(p, FORK_FORK, start_init, NULL, NULL, &initproc)) 458 panic("fork init"); 459 initprocess = initproc->p_p; 460 } 461 462 randompid = 1; 463 464 /* 465 * Create any kernel threads whose creation was deferred because 466 * initprocess had not yet been created. 467 */ 468 kthread_run_deferred_queue(); 469 470 /* 471 * Now that device driver threads have been created, wait for 472 * them to finish any deferred autoconfiguration. Note we don't 473 * need to lock this semaphore, since we haven't booted any 474 * secondary processors, yet. 475 */ 476 while (config_pending) 477 tsleep_nsec(&config_pending, PWAIT, "cfpend", INFSLP); 478 479 dostartuphooks(); 480 481 #if NVSCSI > 0 482 config_rootfound("vscsi", NULL); 483 #endif 484 #if NSOFTRAID > 0 485 config_rootfound("softraid", NULL); 486 #endif 487 488 /* Configure root/swap devices */ 489 diskconf(); 490 491 #ifdef DDB 492 /* Make debug symbols available in ddb. */ 493 db_ctf_init(); 494 #endif 495 496 if (mountroot == NULL || ((*mountroot)() != 0)) 497 panic("cannot mount root"); 498 499 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 500 501 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 502 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 503 panic("cannot find root vnode"); 504 p->p_fd->fd_cdir = rootvnode; 505 vref(p->p_fd->fd_cdir); 506 VOP_UNLOCK(rootvnode); 507 p->p_fd->fd_rdir = NULL; 508 509 /* 510 * Now that root is mounted, we can fixup initprocess's CWD 511 * info. All other processes are kthreads, which merely 512 * share proc0's CWD info. 513 */ 514 initprocess->ps_fd->fd_cdir = rootvnode; 515 vref(initprocess->ps_fd->fd_cdir); 516 initprocess->ps_fd->fd_rdir = NULL; 517 518 /* 519 * Now can look at time, having had a chance to verify the time 520 * from the file system. Reset p->p_rtime as it may have been 521 * munched in mi_switch() after the time got set. 522 */ 523 LIST_FOREACH(pr, &allprocess, ps_list) { 524 nanouptime(&pr->ps_start); 525 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 526 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 527 timespecclear(&p->p_rtime); 528 } 529 } 530 531 uvm_swap_init(); 532 533 /* Create the pageout daemon kernel thread. */ 534 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 535 panic("fork pagedaemon"); 536 537 /* Create the reaper daemon kernel thread. */ 538 if (kthread_create(reaper, NULL, &reaperproc, "reaper")) 539 panic("fork reaper"); 540 541 /* Create the cleaner daemon kernel thread. */ 542 if (kthread_create(buf_daemon, NULL, &cleanerproc, "cleaner")) 543 panic("fork cleaner"); 544 545 /* Create the update daemon kernel thread. */ 546 if (kthread_create(syncer_thread, NULL, &syncerproc, "update")) 547 panic("fork update"); 548 549 /* Create the aiodone daemon kernel thread. */ 550 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 551 panic("fork aiodoned"); 552 553 #if !defined(__hppa__) 554 /* Create the page zeroing kernel thread. */ 555 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 556 panic("fork zerothread"); 557 #endif 558 559 #if defined(MULTIPROCESSOR) 560 /* Boot the secondary processors. */ 561 cpu_boot_secondary_processors(); 562 #endif 563 564 /* Now that all CPUs partake in scheduling, start SMR thread. */ 565 smr_startup_thread(); 566 567 config_process_deferred_mountroot(); 568 569 /* 570 * Okay, now we can let init(8) exec! It's off to userland! 571 */ 572 start_init_exec = 1; 573 wakeup((void *)&start_init_exec); 574 575 /* 576 * Start the idle pool page garbage collector 577 */ 578 #if !(defined(__m88k__) && defined(MULTIPROCESSOR)) /* XXX */ 579 pool_gc_pages(NULL); 580 #endif 581 582 start_periodic_resettodr(); 583 584 /* 585 * proc0: nothing to do, back to sleep 586 */ 587 while (1) 588 tsleep_nsec(&proc0, PVM, "scheduler", INFSLP); 589 /* NOTREACHED */ 590 } 591 592 /* 593 * List of paths to try when searching for "init". 594 */ 595 static char *initpaths[] = { 596 "/sbin/init", 597 "/sbin/oinit", 598 "/sbin/init.bak", 599 NULL, 600 }; 601 602 void 603 check_console(struct proc *p) 604 { 605 struct nameidata nd; 606 int error; 607 608 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 609 error = namei(&nd); 610 if (error) { 611 if (error == ENOENT) 612 printf("warning: /dev/console does not exist\n"); 613 else 614 printf("warning: /dev/console error %d\n", error); 615 } else 616 vrele(nd.ni_vp); 617 } 618 619 /* 620 * Start the initial user process; try exec'ing each pathname in "initpaths". 621 * The program is invoked with one argument containing the boot flags. 622 */ 623 void 624 start_init(void *arg) 625 { 626 struct proc *p = arg; 627 vaddr_t addr; 628 struct sys_execve_args /* { 629 syscallarg(const char *) path; 630 syscallarg(char *const *) argp; 631 syscallarg(char *const *) envp; 632 } */ args; 633 int options, error; 634 long i; 635 register_t retval[2]; 636 char flags[4], *flagsp; 637 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 638 639 /* 640 * Now in process 1. 641 */ 642 643 /* 644 * Wait for main() to tell us that it's safe to exec. 645 */ 646 while (start_init_exec == 0) 647 tsleep_nsec(&start_init_exec, PWAIT, "initexec", INFSLP); 648 649 check_console(p); 650 651 /* process 0 ignores SIGCHLD, but we can't */ 652 p->p_p->ps_sigacts->ps_sigflags = 0; 653 654 /* 655 * Need just enough stack to hold the faked-up "execve()" arguments. 656 */ 657 #ifdef MACHINE_STACK_GROWS_UP 658 addr = USRSTACK; 659 #else 660 addr = USRSTACK - PAGE_SIZE; 661 #endif 662 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 663 p->p_vmspace->vm_minsaddr = (caddr_t)(addr + PAGE_SIZE); 664 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 665 NULL, UVM_UNKNOWN_OFFSET, 0, 666 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, MAP_INHERIT_COPY, 667 MADV_NORMAL, 668 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW|UVM_FLAG_STACK|UVM_FLAG_SYSCALL))) 669 panic("init: couldn't allocate argument space"); 670 671 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 672 #ifdef MACHINE_STACK_GROWS_UP 673 ucp = (char *)addr; 674 #else 675 ucp = (char *)(addr + PAGE_SIZE); 676 #endif 677 /* 678 * Construct the boot flag argument. 679 */ 680 flagsp = flags; 681 *flagsp++ = '-'; 682 options = 0; 683 684 if (boothowto & RB_SINGLE) { 685 *flagsp++ = 's'; 686 options = 1; 687 } 688 #ifdef notyet 689 if (boothowto & RB_FASTBOOT) { 690 *flagsp++ = 'f'; 691 options = 1; 692 } 693 #endif 694 695 /* 696 * Move out the flags (arg 1), if necessary. 697 */ 698 if (options != 0) { 699 *flagsp++ = '\0'; 700 i = flagsp - flags; 701 #ifdef DEBUG 702 printf("init: copying out flags `%s' %ld\n", flags, i); 703 #endif 704 #ifdef MACHINE_STACK_GROWS_UP 705 arg1 = ucp; 706 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 707 ucp += i; 708 #else 709 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 710 arg1 = ucp; 711 #endif 712 } 713 714 /* 715 * Move out the file name (also arg 0). 716 */ 717 i = strlen(path) + 1; 718 #ifdef DEBUG 719 printf("init: copying out path `%s' %ld\n", path, i); 720 #endif 721 #ifdef MACHINE_STACK_GROWS_UP 722 arg0 = ucp; 723 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 724 ucp += i; 725 ucp = (caddr_t)ALIGN((u_long)ucp); 726 uap = (char **)ucp + 3; 727 #else 728 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 729 arg0 = ucp; 730 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 731 #endif 732 733 /* 734 * Move out the arg pointers. 735 */ 736 i = 0; 737 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 738 if (options != 0) 739 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 740 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 741 742 /* 743 * Point at the arguments. 744 */ 745 SCARG(&args, path) = arg0; 746 SCARG(&args, argp) = uap; 747 SCARG(&args, envp) = NULL; 748 749 /* 750 * Now try to exec the program. If can't for any reason 751 * other than it doesn't exist, complain. 752 */ 753 if ((error = sys_execve(p, &args, retval)) == 0) { 754 KERNEL_UNLOCK(); 755 return; 756 } 757 if (error != ENOENT) 758 printf("exec %s: error %d\n", path, error); 759 } 760 printf("init: not found\n"); 761 panic("no init"); 762 } 763