1 /* $OpenBSD: init_main.c,v 1.306 2021/02/08 10:51:01 mpi 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 #include <sys/smr.h> 80 81 #include <sys/syscall.h> 82 #include <sys/syscallargs.h> 83 84 #include <uvm/uvm_extern.h> 85 86 #include <ufs/ufs/quota.h> 87 88 #include <net/if.h> 89 #include <net/rtable.h> 90 #include <net/netisr.h> 91 92 #if defined(CRYPTO) 93 #include <crypto/cryptodev.h> 94 #include <crypto/cryptosoft.h> 95 #endif 96 97 #if defined(KUBSAN) 98 extern void kubsan_init(void); 99 #endif 100 101 #if defined(NFSSERVER) || defined(NFSCLIENT) 102 extern void nfs_init(void); 103 #endif 104 105 #include "stoeplitz.h" 106 #if NSTOEPLITZ > 0 107 extern void stoeplitz_init(void); 108 #endif 109 110 #include "mpath.h" 111 #include "vscsi.h" 112 #include "softraid.h" 113 114 const char copyright[] = 115 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 116 "\tThe Regents of the University of California. All rights reserved.\n" 117 "Copyright (c) 1995-2021 OpenBSD. All rights reserved. https://www.OpenBSD.org\n"; 118 119 /* Components of the first process -- never freed. */ 120 struct session session0; 121 struct pgrp pgrp0; 122 struct proc proc0; 123 struct process process0; 124 struct plimit limit0; 125 struct vmspace vmspace0; 126 struct sigacts sigacts0; 127 struct process *initprocess; 128 struct proc *reaperproc; 129 130 extern struct user *proc0paddr; 131 132 struct vnode *rootvp, *swapdev_vp; 133 int boothowto; 134 int db_active = 0; 135 int ncpus = 1; 136 int ncpusfound = 1; /* number of cpus we find */ 137 volatile int start_init_exec; /* semaphore for start_init() */ 138 139 #if !defined(NO_PROPOLICE) 140 long __guard_local __attribute__((section(".openbsd.randomdata"))); 141 #endif 142 143 /* XXX return int so gcc -Werror won't complain */ 144 int main(void *); 145 void check_console(struct proc *); 146 void start_init(void *); 147 void crypto_init(void); 148 void db_ctf_init(void); 149 void prof_init(void); 150 void init_exec(void); 151 void kqueue_init(void); 152 void futex_init(void); 153 void taskq_init(void); 154 void timeout_proc_init(void); 155 void pool_gc_pages(void *); 156 void percpu_init(void); 157 158 extern char sigcode[], esigcode[], sigcoderet[]; 159 #ifdef SYSCALL_DEBUG 160 extern char *syscallnames[]; 161 #endif 162 163 struct emul emul_native = { 164 "native", 165 NULL, 166 SYS_syscall, 167 SYS_MAXSYSCALL, 168 sysent, 169 #ifdef SYSCALL_DEBUG 170 syscallnames, 171 #else 172 NULL, 173 #endif 174 0, 175 copyargs, 176 setregs, 177 NULL, /* fixup */ 178 NULL, /* coredump */ 179 sigcode, 180 esigcode, 181 sigcoderet 182 }; 183 184 #ifdef DIAGNOSTIC 185 int pdevinit_done = 0; 186 #endif 187 188 /* 189 * System startup; initialize the world, create process 0, mount root 190 * filesystem, and fork to create init and pagedaemon. Most of the 191 * hard work is done in the lower-level initialization routines including 192 * startup(), which does memory initialization and autoconfiguration. 193 */ 194 /* XXX return int, so gcc -Werror won't complain */ 195 int 196 main(void *framep) 197 { 198 struct proc *p; 199 struct process *pr; 200 struct pdevinit *pdev; 201 extern struct pdevinit pdevinit[]; 202 extern void disk_init(void); 203 204 /* 205 * Initialize the current process pointer (curproc) before 206 * any possible traps/probes to simplify trap processing. 207 */ 208 curproc = p = &proc0; 209 p->p_cpu = curcpu(); 210 211 /* 212 * Initialize timeouts. 213 */ 214 timeout_startup(); 215 216 /* 217 * Attempt to find console and initialize 218 * in case of early panic or other messages. 219 */ 220 config_init(); /* init autoconfiguration data structures */ 221 consinit(); 222 223 printf("%s\n", copyright); 224 225 #ifdef KUBSAN 226 /* Initialize kubsan. */ 227 kubsan_init(); 228 #endif 229 230 WITNESS_INITIALIZE(); 231 232 KERNEL_LOCK_INIT(); 233 SCHED_LOCK_INIT(); 234 235 rw_obj_init(); 236 uvm_init(); 237 disk_init(); /* must come before autoconfiguration */ 238 tty_init(); /* initialise tty's */ 239 cpu_startup(); 240 241 random_start(boothowto & RB_GOODRANDOM); /* Start the flow */ 242 243 /* 244 * Initialize mbuf's. Do this now because we might attempt to 245 * allocate mbufs or mbuf clusters during autoconfiguration. 246 */ 247 mbinit(); 248 249 #if NSTOEPLITZ > 0 250 stoeplitz_init(); 251 #endif 252 253 /* Initialize sockets. */ 254 soinit(); 255 256 /* Initialize SRP subsystem. */ 257 srp_startup(); 258 259 /* Initialize SMR subsystem. */ 260 smr_startup(); 261 262 /* 263 * Initialize process and pgrp structures. 264 */ 265 procinit(); 266 267 /* Initialize file locking. */ 268 lf_init(); 269 270 /* 271 * Initialize filedescriptors. 272 */ 273 filedesc_init(); 274 275 /* 276 * Initialize pipes. 277 */ 278 pipe_init(); 279 280 /* 281 * Initialize kqueues. 282 */ 283 kqueue_init(); 284 285 /* 286 * Initialize futexes. 287 */ 288 futex_init(); 289 290 /* Create credentials. */ 291 p->p_ucred = crget(); 292 p->p_ucred->cr_ngroups = 1; /* group 0 */ 293 294 /* 295 * Create process 0 (the swapper). 296 */ 297 pr = &process0; 298 process_initialize(pr, p); 299 300 LIST_INSERT_HEAD(&allprocess, pr, ps_list); 301 LIST_INSERT_HEAD(PIDHASH(0), pr, ps_hash); 302 atomic_setbits_int(&pr->ps_flags, PS_SYSTEM); 303 304 /* Set the default routing table/domain. */ 305 process0.ps_rtableid = 0; 306 307 LIST_INSERT_HEAD(&allproc, p, p_list); 308 pr->ps_pgrp = &pgrp0; 309 LIST_INSERT_HEAD(TIDHASH(0), p, p_hash); 310 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 311 LIST_INIT(&pgrp0.pg_members); 312 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 313 314 pgrp0.pg_session = &session0; 315 session0.s_count = 1; 316 session0.s_leader = pr; 317 318 atomic_setbits_int(&p->p_flag, P_SYSTEM); 319 p->p_stat = SONPROC; 320 pr->ps_nice = NZERO; 321 pr->ps_emul = &emul_native; 322 strlcpy(pr->ps_comm, "swapper", sizeof(pr->ps_comm)); 323 324 /* Init timeouts. */ 325 timeout_set(&p->p_sleep_to, endtsleep, p); 326 327 /* Initialize signal state for process 0. */ 328 signal_init(); 329 siginit(&sigacts0); 330 pr->ps_sigacts = &sigacts0; 331 332 /* Create the file descriptor table. */ 333 p->p_fd = pr->ps_fd = fdinit(); 334 335 /* Create the limits structures. */ 336 lim_startup(&limit0); 337 pr->ps_limit = &limit0; 338 339 /* Allocate a prototype map so we have something to fork. */ 340 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 341 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 342 p->p_vmspace = pr->ps_vmspace = &vmspace0; 343 344 p->p_addr = proc0paddr; /* XXX */ 345 346 /* 347 * Charge root for one process. 348 */ 349 (void)chgproccnt(0, 1); 350 351 /* Initialize run queues */ 352 sched_init_runqueues(); 353 sleep_queue_init(); 354 sched_init_cpu(curcpu()); 355 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 356 357 /* Initialize timeouts in process context. */ 358 timeout_proc_init(); 359 360 /* Initialize task queues */ 361 taskq_init(); 362 363 /* Initialize the interface/address trees */ 364 ifinit(); 365 366 /* Lock the kernel on behalf of proc0. */ 367 KERNEL_LOCK(); 368 369 #if NMPATH > 0 370 /* Attach mpath before hardware */ 371 config_rootfound("mpath", NULL); 372 #endif 373 374 /* Configure the devices */ 375 cpu_configure(); 376 377 /* Configure virtual memory system, set vm rlimits. */ 378 uvm_init_limits(&limit0); 379 380 /* Per CPU memory allocation */ 381 percpu_init(); 382 383 /* Initialize the file systems. */ 384 #if defined(NFSSERVER) || defined(NFSCLIENT) 385 nfs_init(); /* initialize server/shared data */ 386 #endif 387 vfsinit(); 388 389 /* Start real time and statistics clocks. */ 390 initclocks(); 391 392 #ifdef SYSVSHM 393 /* Initialize System V style shared memory. */ 394 shminit(); 395 #endif 396 397 #ifdef SYSVSEM 398 /* Initialize System V style semaphores. */ 399 seminit(); 400 #endif 401 402 #ifdef SYSVMSG 403 /* Initialize System V style message queues. */ 404 msginit(); 405 #endif 406 407 /* Create default routing table before attaching lo0. */ 408 rtable_init(); 409 410 /* Attach pseudo-devices. */ 411 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 412 if (pdev->pdev_count > 0) 413 (*pdev->pdev_attach)(pdev->pdev_count); 414 #ifdef DIAGNOSTIC 415 pdevinit_done = 1; 416 #endif 417 418 #ifdef CRYPTO 419 crypto_init(); 420 swcr_init(); 421 #endif /* CRYPTO */ 422 423 /* 424 * Initialize protocols. 425 */ 426 domaininit(); 427 428 initconsbuf(); 429 430 #if defined(GPROF) || defined(DDBPROF) 431 /* Initialize kernel profiling. */ 432 prof_init(); 433 #endif 434 435 mbcpuinit(); /* enable per cpu mbuf data */ 436 uvm_init_percpu(); 437 438 /* init exec and emul */ 439 init_exec(); 440 441 /* Start the scheduler */ 442 scheduler_start(); 443 444 /* 445 * Create process 1 (init(8)). We do this now, as Unix has 446 * historically had init be process 1, and changing this would 447 * probably upset a lot of people. 448 * 449 * Note that process 1 won't immediately exec init(8), but will 450 * wait for us to inform it that the root file system has been 451 * mounted. 452 */ 453 { 454 struct proc *initproc; 455 456 if (fork1(p, FORK_FORK, start_init, NULL, NULL, &initproc)) 457 panic("fork init"); 458 initprocess = initproc->p_p; 459 } 460 461 randompid = 1; 462 463 /* 464 * Create any kernel threads whose creation was deferred because 465 * initprocess had not yet been created. 466 */ 467 kthread_run_deferred_queue(); 468 469 /* 470 * Now that device driver threads have been created, wait for 471 * them to finish any deferred autoconfiguration. Note we don't 472 * need to lock this semaphore, since we haven't booted any 473 * secondary processors, yet. 474 */ 475 while (config_pending) 476 tsleep_nsec(&config_pending, PWAIT, "cfpend", INFSLP); 477 478 dostartuphooks(); 479 480 #if NVSCSI > 0 481 config_rootfound("vscsi", NULL); 482 #endif 483 #if NSOFTRAID > 0 484 config_rootfound("softraid", NULL); 485 #endif 486 487 /* Configure root/swap devices */ 488 diskconf(); 489 490 #ifdef DDB 491 /* Make debug symbols available in ddb. */ 492 db_ctf_init(); 493 #endif 494 495 if (mountroot == NULL || ((*mountroot)() != 0)) 496 panic("cannot mount root"); 497 498 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 499 500 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 501 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 502 panic("cannot find root vnode"); 503 p->p_fd->fd_cdir = rootvnode; 504 vref(p->p_fd->fd_cdir); 505 VOP_UNLOCK(rootvnode); 506 p->p_fd->fd_rdir = NULL; 507 508 /* 509 * Now that root is mounted, we can fixup initprocess's CWD 510 * info. All other processes are kthreads, which merely 511 * share proc0's CWD info. 512 */ 513 initprocess->ps_fd->fd_cdir = rootvnode; 514 vref(initprocess->ps_fd->fd_cdir); 515 initprocess->ps_fd->fd_rdir = NULL; 516 517 /* 518 * Now can look at time, having had a chance to verify the time 519 * from the file system. Reset p->p_rtime as it may have been 520 * munched in mi_switch() after the time got set. 521 */ 522 LIST_FOREACH(pr, &allprocess, ps_list) { 523 nanouptime(&pr->ps_start); 524 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 525 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 526 timespecclear(&p->p_rtime); 527 } 528 } 529 530 uvm_swap_init(); 531 532 /* Create the pageout daemon kernel thread. */ 533 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 534 panic("fork pagedaemon"); 535 536 /* Create the reaper daemon kernel thread. */ 537 if (kthread_create(reaper, NULL, &reaperproc, "reaper")) 538 panic("fork reaper"); 539 540 /* Create the cleaner daemon kernel thread. */ 541 if (kthread_create(buf_daemon, NULL, &cleanerproc, "cleaner")) 542 panic("fork cleaner"); 543 544 /* Create the update daemon kernel thread. */ 545 if (kthread_create(syncer_thread, NULL, &syncerproc, "update")) 546 panic("fork update"); 547 548 /* Create the aiodone daemon kernel thread. */ 549 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 550 panic("fork aiodoned"); 551 552 #if !defined(__hppa__) 553 /* Create the page zeroing kernel thread. */ 554 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 555 panic("fork zerothread"); 556 #endif 557 558 #if defined(MULTIPROCESSOR) 559 /* Boot the secondary processors. */ 560 cpu_boot_secondary_processors(); 561 #endif 562 563 /* Now that all CPUs partake in scheduling, start SMR thread. */ 564 smr_startup_thread(); 565 566 config_process_deferred_mountroot(); 567 568 /* 569 * Okay, now we can let init(8) exec! It's off to userland! 570 */ 571 start_init_exec = 1; 572 wakeup((void *)&start_init_exec); 573 574 /* 575 * Start the idle pool page garbage collector 576 */ 577 #if !(defined(__m88k__) && defined(MULTIPROCESSOR)) /* XXX */ 578 pool_gc_pages(NULL); 579 #endif 580 581 start_periodic_resettodr(); 582 583 /* 584 * proc0: nothing to do, back to sleep 585 */ 586 while (1) 587 tsleep_nsec(&proc0, PVM, "scheduler", INFSLP); 588 /* NOTREACHED */ 589 } 590 591 /* 592 * List of paths to try when searching for "init". 593 */ 594 static char *initpaths[] = { 595 "/sbin/init", 596 "/sbin/oinit", 597 "/sbin/init.bak", 598 NULL, 599 }; 600 601 void 602 check_console(struct proc *p) 603 { 604 struct nameidata nd; 605 int error; 606 607 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 608 error = namei(&nd); 609 if (error) { 610 if (error == ENOENT) 611 printf("warning: /dev/console does not exist\n"); 612 else 613 printf("warning: /dev/console error %d\n", error); 614 } else 615 vrele(nd.ni_vp); 616 } 617 618 /* 619 * Start the initial user process; try exec'ing each pathname in "initpaths". 620 * The program is invoked with one argument containing the boot flags. 621 */ 622 void 623 start_init(void *arg) 624 { 625 struct proc *p = arg; 626 vaddr_t addr; 627 struct sys_execve_args /* { 628 syscallarg(const char *) path; 629 syscallarg(char *const *) argp; 630 syscallarg(char *const *) envp; 631 } */ args; 632 int options, error; 633 long i; 634 register_t retval[2]; 635 char flags[4], *flagsp; 636 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 637 638 /* 639 * Now in process 1. 640 */ 641 642 /* 643 * Wait for main() to tell us that it's safe to exec. 644 */ 645 while (start_init_exec == 0) 646 tsleep_nsec(&start_init_exec, PWAIT, "initexec", INFSLP); 647 648 check_console(p); 649 650 /* process 0 ignores SIGCHLD, but we can't */ 651 p->p_p->ps_sigacts->ps_sigflags = 0; 652 653 /* 654 * Need just enough stack to hold the faked-up "execve()" arguments. 655 */ 656 #ifdef MACHINE_STACK_GROWS_UP 657 addr = USRSTACK; 658 #else 659 addr = USRSTACK - PAGE_SIZE; 660 #endif 661 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 662 p->p_vmspace->vm_minsaddr = (caddr_t)(addr + PAGE_SIZE); 663 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 664 NULL, UVM_UNKNOWN_OFFSET, 0, 665 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, MAP_INHERIT_COPY, 666 MADV_NORMAL, 667 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW|UVM_FLAG_STACK|UVM_FLAG_SYSCALL))) 668 panic("init: couldn't allocate argument space"); 669 670 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 671 #ifdef MACHINE_STACK_GROWS_UP 672 ucp = (char *)addr; 673 #else 674 ucp = (char *)(addr + PAGE_SIZE); 675 #endif 676 /* 677 * Construct the boot flag argument. 678 */ 679 flagsp = flags; 680 *flagsp++ = '-'; 681 options = 0; 682 683 if (boothowto & RB_SINGLE) { 684 *flagsp++ = 's'; 685 options = 1; 686 } 687 #ifdef notyet 688 if (boothowto & RB_FASTBOOT) { 689 *flagsp++ = 'f'; 690 options = 1; 691 } 692 #endif 693 694 /* 695 * Move out the flags (arg 1), if necessary. 696 */ 697 if (options != 0) { 698 *flagsp++ = '\0'; 699 i = flagsp - flags; 700 #ifdef DEBUG 701 printf("init: copying out flags `%s' %ld\n", flags, i); 702 #endif 703 #ifdef MACHINE_STACK_GROWS_UP 704 arg1 = ucp; 705 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 706 ucp += i; 707 #else 708 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 709 arg1 = ucp; 710 #endif 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' %ld\n", path, i); 719 #endif 720 #ifdef MACHINE_STACK_GROWS_UP 721 arg0 = ucp; 722 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 723 ucp += i; 724 ucp = (caddr_t)ALIGN((u_long)ucp); 725 uap = (char **)ucp + 3; 726 #else 727 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 728 arg0 = ucp; 729 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 730 #endif 731 732 /* 733 * Move out the arg pointers. 734 */ 735 i = 0; 736 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 737 if (options != 0) 738 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 739 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 740 741 /* 742 * Point at the arguments. 743 */ 744 SCARG(&args, path) = arg0; 745 SCARG(&args, argp) = uap; 746 SCARG(&args, envp) = NULL; 747 748 /* 749 * Now try to exec the program. If can't for any reason 750 * other than it doesn't exist, complain. 751 */ 752 if ((error = sys_execve(p, &args, retval)) == 0) { 753 KERNEL_UNLOCK(); 754 return; 755 } 756 if (error != ENOENT) 757 printf("exec %s: error %d\n", path, error); 758 } 759 printf("init: not found\n"); 760 panic("no init"); 761 } 762