1 /* $OpenBSD: init_main.c,v 1.310 2021/12/07 04:19:24 guenther 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 setregs, 174 NULL, /* fixup */ 175 NULL, /* coredump */ 176 sigcode, 177 esigcode, 178 sigcoderet 179 }; 180 181 #ifdef DIAGNOSTIC 182 int pdevinit_done = 0; 183 #endif 184 185 /* 186 * System startup; initialize the world, create process 0, mount root 187 * filesystem, and fork to create init and pagedaemon. Most of the 188 * hard work is done in the lower-level initialization routines including 189 * startup(), which does memory initialization and autoconfiguration. 190 */ 191 /* XXX return int, so gcc -Werror won't complain */ 192 int 193 main(void *framep) 194 { 195 struct proc *p; 196 struct process *pr; 197 struct pdevinit *pdev; 198 extern struct pdevinit pdevinit[]; 199 extern void disk_init(void); 200 201 /* 202 * Initialize the current process pointer (curproc) before 203 * any possible traps/probes to simplify trap processing. 204 */ 205 curproc = p = &proc0; 206 p->p_cpu = curcpu(); 207 208 /* 209 * Initialize timeouts. 210 */ 211 timeout_startup(); 212 213 /* 214 * Attempt to find console and initialize 215 * in case of early panic or other messages. 216 */ 217 config_init(); /* init autoconfiguration data structures */ 218 consinit(); 219 220 printf("%s\n", copyright); 221 222 #ifdef KUBSAN 223 /* Initialize kubsan. */ 224 kubsan_init(); 225 #endif 226 227 WITNESS_INITIALIZE(); 228 229 KERNEL_LOCK_INIT(); 230 SCHED_LOCK_INIT(); 231 232 rw_obj_init(); 233 uvm_init(); 234 disk_init(); /* must come before autoconfiguration */ 235 tty_init(); /* initialise tty's */ 236 cpu_startup(); 237 238 random_start(boothowto & RB_GOODRANDOM); /* Start the flow */ 239 240 /* 241 * Initialize mbuf's. Do this now because we might attempt to 242 * allocate mbufs or mbuf clusters during autoconfiguration. 243 */ 244 mbinit(); 245 246 #if NSTOEPLITZ > 0 247 stoeplitz_init(); 248 #endif 249 250 /* Initialize sockets. */ 251 soinit(); 252 253 /* Initialize SRP subsystem. */ 254 srp_startup(); 255 256 /* Initialize SMR subsystem. */ 257 smr_startup(); 258 259 /* 260 * Initialize process and pgrp structures. 261 */ 262 procinit(); 263 264 /* Initialize file locking. */ 265 lf_init(); 266 267 /* 268 * Initialize filedescriptors. 269 */ 270 filedesc_init(); 271 272 /* 273 * Initialize pipes. 274 */ 275 pipe_init(); 276 277 /* 278 * Initialize kqueues. 279 */ 280 kqueue_init(); 281 282 /* 283 * Initialize futexes. 284 */ 285 futex_init(); 286 287 /* Create credentials. */ 288 p->p_ucred = crget(); 289 p->p_ucred->cr_ngroups = 1; /* group 0 */ 290 291 /* 292 * Create process 0 (the swapper). 293 */ 294 pr = &process0; 295 process_initialize(pr, p); 296 297 LIST_INSERT_HEAD(&allprocess, pr, ps_list); 298 LIST_INSERT_HEAD(PIDHASH(0), pr, ps_hash); 299 atomic_setbits_int(&pr->ps_flags, PS_SYSTEM); 300 301 /* Set the default routing table/domain. */ 302 process0.ps_rtableid = 0; 303 304 LIST_INSERT_HEAD(&allproc, p, p_list); 305 pr->ps_pgrp = &pgrp0; 306 LIST_INSERT_HEAD(TIDHASH(0), p, p_hash); 307 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 308 LIST_INIT(&pgrp0.pg_members); 309 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 310 311 pgrp0.pg_session = &session0; 312 session0.s_count = 1; 313 session0.s_leader = pr; 314 315 atomic_setbits_int(&p->p_flag, P_SYSTEM); 316 p->p_stat = SONPROC; 317 pr->ps_nice = NZERO; 318 pr->ps_emul = &emul_native; 319 strlcpy(pr->ps_comm, "swapper", sizeof(pr->ps_comm)); 320 321 /* Init timeouts. */ 322 timeout_set(&p->p_sleep_to, endtsleep, p); 323 324 /* Initialize signal state for process 0. */ 325 signal_init(); 326 siginit(&sigacts0); 327 pr->ps_sigacts = &sigacts0; 328 329 /* Create the file descriptor table. */ 330 p->p_fd = pr->ps_fd = fdinit(); 331 332 /* Create the limits structures. */ 333 lim_startup(&limit0); 334 pr->ps_limit = &limit0; 335 336 /* Allocate a prototype map so we have something to fork. */ 337 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 338 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 339 p->p_vmspace = pr->ps_vmspace = &vmspace0; 340 341 p->p_addr = proc0paddr; /* XXX */ 342 343 /* 344 * Charge root for one process. 345 */ 346 (void)chgproccnt(0, 1); 347 348 /* Initialize run queues */ 349 sched_init_runqueues(); 350 sleep_queue_init(); 351 sched_init_cpu(curcpu()); 352 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 353 354 /* Initialize timeouts in process context. */ 355 timeout_proc_init(); 356 357 /* Initialize task queues */ 358 taskq_init(); 359 360 /* Initialize the interface/address trees */ 361 ifinit(); 362 363 /* Lock the kernel on behalf of proc0. */ 364 KERNEL_LOCK(); 365 366 #if NMPATH > 0 367 /* Attach mpath before hardware */ 368 config_rootfound("mpath", NULL); 369 #endif 370 371 /* Configure the devices */ 372 cpu_configure(); 373 374 /* Configure virtual memory system, set vm rlimits. */ 375 uvm_init_limits(&limit0); 376 377 /* Per CPU memory allocation */ 378 percpu_init(); 379 380 /* Initialize the file systems. */ 381 #if defined(NFSSERVER) || defined(NFSCLIENT) 382 nfs_init(); /* initialize server/shared data */ 383 #endif 384 vfsinit(); 385 386 /* Start real time and statistics clocks. */ 387 initclocks(); 388 389 #ifdef SYSVSHM 390 /* Initialize System V style shared memory. */ 391 shminit(); 392 #endif 393 394 #ifdef SYSVSEM 395 /* Initialize System V style semaphores. */ 396 seminit(); 397 #endif 398 399 #ifdef SYSVMSG 400 /* Initialize System V style message queues. */ 401 msginit(); 402 #endif 403 404 /* Create default routing table before attaching lo0. */ 405 rtable_init(); 406 407 /* Attach pseudo-devices. */ 408 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 409 if (pdev->pdev_count > 0) 410 (*pdev->pdev_attach)(pdev->pdev_count); 411 #ifdef DIAGNOSTIC 412 pdevinit_done = 1; 413 #endif 414 415 #ifdef CRYPTO 416 crypto_init(); 417 swcr_init(); 418 #endif /* CRYPTO */ 419 420 /* 421 * Initialize protocols. 422 */ 423 domaininit(); 424 425 initconsbuf(); 426 427 #if defined(GPROF) || defined(DDBPROF) 428 /* Initialize kernel profiling. */ 429 prof_init(); 430 #endif 431 432 /* Enable per-CPU data. */ 433 mbcpuinit(); 434 kqueue_init_percpu(); 435 uvm_init_percpu(); 436 437 /* init exec and emul */ 438 init_exec(); 439 440 /* Start the scheduler */ 441 scheduler_start(); 442 443 /* 444 * Create process 1 (init(8)). We do this now, as Unix has 445 * historically had init be process 1, and changing this would 446 * probably upset a lot of people. 447 * 448 * Note that process 1 won't immediately exec init(8), but will 449 * wait for us to inform it that the root file system has been 450 * mounted. 451 */ 452 { 453 struct proc *initproc; 454 455 if (fork1(p, FORK_FORK, start_init, NULL, NULL, &initproc)) 456 panic("fork init"); 457 initprocess = initproc->p_p; 458 } 459 460 randompid = 1; 461 462 /* 463 * Create any kernel threads whose creation was deferred because 464 * initprocess had not yet been created. 465 */ 466 kthread_run_deferred_queue(); 467 468 /* 469 * Now that device driver threads have been created, wait for 470 * them to finish any deferred autoconfiguration. Note we don't 471 * need to lock this semaphore, since we haven't booted any 472 * secondary processors, yet. 473 */ 474 while (config_pending) 475 tsleep_nsec(&config_pending, PWAIT, "cfpend", INFSLP); 476 477 dostartuphooks(); 478 479 #if NVSCSI > 0 480 config_rootfound("vscsi", NULL); 481 #endif 482 #if NSOFTRAID > 0 483 config_rootfound("softraid", NULL); 484 #endif 485 486 /* Configure root/swap devices */ 487 diskconf(); 488 489 #ifdef DDB 490 /* Make debug symbols available in ddb. */ 491 db_ctf_init(); 492 #endif 493 494 if (mountroot == NULL || ((*mountroot)() != 0)) 495 panic("cannot mount root"); 496 497 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 498 499 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 500 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 501 panic("cannot find root vnode"); 502 p->p_fd->fd_cdir = rootvnode; 503 vref(p->p_fd->fd_cdir); 504 VOP_UNLOCK(rootvnode); 505 p->p_fd->fd_rdir = NULL; 506 507 /* 508 * Now that root is mounted, we can fixup initprocess's CWD 509 * info. All other processes are kthreads, which merely 510 * share proc0's CWD info. 511 */ 512 initprocess->ps_fd->fd_cdir = rootvnode; 513 vref(initprocess->ps_fd->fd_cdir); 514 initprocess->ps_fd->fd_rdir = NULL; 515 516 /* 517 * Now can look at time, having had a chance to verify the time 518 * from the file system. Reset p->p_rtime as it may have been 519 * munched in mi_switch() after the time got set. 520 */ 521 LIST_FOREACH(pr, &allprocess, ps_list) { 522 nanouptime(&pr->ps_start); 523 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 524 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 525 timespecclear(&p->p_rtime); 526 } 527 } 528 529 uvm_swap_init(); 530 531 /* Create the pageout daemon kernel thread. */ 532 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 533 panic("fork pagedaemon"); 534 535 /* Create the reaper daemon kernel thread. */ 536 if (kthread_create(reaper, NULL, &reaperproc, "reaper")) 537 panic("fork reaper"); 538 539 /* Create the cleaner daemon kernel thread. */ 540 if (kthread_create(buf_daemon, NULL, &cleanerproc, "cleaner")) 541 panic("fork cleaner"); 542 543 /* Create the update daemon kernel thread. */ 544 if (kthread_create(syncer_thread, NULL, &syncerproc, "update")) 545 panic("fork update"); 546 547 /* Create the aiodone daemon kernel thread. */ 548 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 549 panic("fork aiodoned"); 550 551 #if !defined(__hppa__) 552 /* Create the page zeroing kernel thread. */ 553 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 554 panic("fork zerothread"); 555 #endif 556 557 #if defined(MULTIPROCESSOR) 558 /* Boot the secondary processors. */ 559 cpu_boot_secondary_processors(); 560 #endif 561 562 /* Now that all CPUs partake in scheduling, start SMR thread. */ 563 smr_startup_thread(); 564 565 config_process_deferred_mountroot(); 566 567 /* 568 * Okay, now we can let init(8) exec! It's off to userland! 569 */ 570 start_init_exec = 1; 571 wakeup((void *)&start_init_exec); 572 573 /* 574 * Start the idle pool page garbage collector 575 */ 576 #if !(defined(__m88k__) && defined(MULTIPROCESSOR)) /* XXX */ 577 pool_gc_pages(NULL); 578 #endif 579 580 start_periodic_resettodr(); 581 582 /* 583 * proc0: nothing to do, back to sleep 584 */ 585 while (1) 586 tsleep_nsec(&proc0, PVM, "scheduler", INFSLP); 587 /* NOTREACHED */ 588 } 589 590 /* 591 * List of paths to try when searching for "init". 592 */ 593 static char *initpaths[] = { 594 "/sbin/init", 595 "/sbin/oinit", 596 "/sbin/init.bak", 597 NULL, 598 }; 599 600 void 601 check_console(struct proc *p) 602 { 603 struct nameidata nd; 604 int error; 605 606 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 607 error = namei(&nd); 608 if (error) { 609 if (error == ENOENT) 610 printf("warning: /dev/console does not exist\n"); 611 else 612 printf("warning: /dev/console error %d\n", error); 613 } else 614 vrele(nd.ni_vp); 615 } 616 617 /* 618 * Start the initial user process; try exec'ing each pathname in "initpaths". 619 * The program is invoked with one argument containing the boot flags. 620 */ 621 void 622 start_init(void *arg) 623 { 624 struct proc *p = arg; 625 vaddr_t addr; 626 struct sys_execve_args /* { 627 syscallarg(const char *) path; 628 syscallarg(char *const *) argp; 629 syscallarg(char *const *) envp; 630 } */ args; 631 int options, error; 632 long i; 633 register_t retval[2]; 634 char flags[4], *flagsp; 635 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 636 637 /* 638 * Now in process 1. 639 */ 640 641 /* 642 * Wait for main() to tell us that it's safe to exec. 643 */ 644 while (start_init_exec == 0) 645 tsleep_nsec(&start_init_exec, PWAIT, "initexec", INFSLP); 646 647 check_console(p); 648 649 /* process 0 ignores SIGCHLD, but we can't */ 650 p->p_p->ps_sigacts->ps_sigflags = 0; 651 652 /* 653 * Need just enough stack to hold the faked-up "execve()" arguments. 654 */ 655 #ifdef MACHINE_STACK_GROWS_UP 656 addr = USRSTACK; 657 #else 658 addr = USRSTACK - PAGE_SIZE; 659 #endif 660 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 661 p->p_vmspace->vm_minsaddr = (caddr_t)(addr + PAGE_SIZE); 662 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 663 NULL, UVM_UNKNOWN_OFFSET, 0, 664 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, MAP_INHERIT_COPY, 665 MADV_NORMAL, 666 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW|UVM_FLAG_STACK|UVM_FLAG_SYSCALL))) 667 panic("init: couldn't allocate argument space"); 668 669 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 670 #ifdef MACHINE_STACK_GROWS_UP 671 ucp = (char *)addr; 672 #else 673 ucp = (char *)(addr + PAGE_SIZE); 674 #endif 675 /* 676 * Construct the boot flag argument. 677 */ 678 flagsp = flags; 679 *flagsp++ = '-'; 680 options = 0; 681 682 if (boothowto & RB_SINGLE) { 683 *flagsp++ = 's'; 684 options = 1; 685 } 686 #ifdef notyet 687 if (boothowto & RB_FASTBOOT) { 688 *flagsp++ = 'f'; 689 options = 1; 690 } 691 #endif 692 693 /* 694 * Move out the flags (arg 1), if necessary. 695 */ 696 if (options != 0) { 697 *flagsp++ = '\0'; 698 i = flagsp - flags; 699 #ifdef DEBUG 700 printf("init: copying out flags `%s' %ld\n", flags, i); 701 #endif 702 #ifdef MACHINE_STACK_GROWS_UP 703 arg1 = ucp; 704 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 705 ucp += i; 706 #else 707 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 708 arg1 = ucp; 709 #endif 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' %ld\n", path, i); 718 #endif 719 #ifdef MACHINE_STACK_GROWS_UP 720 arg0 = ucp; 721 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 722 ucp += i; 723 ucp = (caddr_t)ALIGN((u_long)ucp); 724 uap = (char **)ucp + 3; 725 #else 726 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 727 arg0 = ucp; 728 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 729 #endif 730 731 /* 732 * Move out the arg pointers. 733 */ 734 i = 0; 735 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 736 if (options != 0) 737 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 738 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 739 740 /* 741 * Point at the arguments. 742 */ 743 SCARG(&args, path) = arg0; 744 SCARG(&args, argp) = uap; 745 SCARG(&args, envp) = NULL; 746 747 /* 748 * Now try to exec the program. If can't for any reason 749 * other than it doesn't exist, complain. 750 */ 751 if ((error = sys_execve(p, &args, retval)) == 0) { 752 KERNEL_UNLOCK(); 753 return; 754 } 755 if (error != ENOENT) 756 printf("exec %s: error %d\n", path, error); 757 } 758 printf("init: not found\n"); 759 panic("no init"); 760 } 761