1 /* $OpenBSD: init_main.c,v 1.301 2020/09/13 09:42:31 claudio 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) 1995-2020 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 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 mbcpuinit(); /* enable per cpu mbuf data */ 435 436 /* init exec and emul */ 437 init_exec(); 438 439 /* Start the scheduler */ 440 scheduler_start(); 441 442 /* 443 * Create process 1 (init(8)). We do this now, as Unix has 444 * historically had init be process 1, and changing this would 445 * probably upset a lot of people. 446 * 447 * Note that process 1 won't immediately exec init(8), but will 448 * wait for us to inform it that the root file system has been 449 * mounted. 450 */ 451 { 452 struct proc *initproc; 453 454 if (fork1(p, FORK_FORK, start_init, NULL, NULL, &initproc)) 455 panic("fork init"); 456 initprocess = initproc->p_p; 457 } 458 459 randompid = 1; 460 461 /* 462 * Create any kernel threads whose creation was deferred because 463 * initprocess had not yet been created. 464 */ 465 kthread_run_deferred_queue(); 466 467 /* 468 * Now that device driver threads have been created, wait for 469 * them to finish any deferred autoconfiguration. Note we don't 470 * need to lock this semaphore, since we haven't booted any 471 * secondary processors, yet. 472 */ 473 while (config_pending) 474 tsleep_nsec(&config_pending, PWAIT, "cfpend", INFSLP); 475 476 dostartuphooks(); 477 478 #if NVSCSI > 0 479 config_rootfound("vscsi", NULL); 480 #endif 481 #if NSOFTRAID > 0 482 config_rootfound("softraid", NULL); 483 #endif 484 485 /* Configure root/swap devices */ 486 diskconf(); 487 488 #ifdef DDB 489 /* Make debug symbols available in ddb. */ 490 db_ctf_init(); 491 #endif 492 493 if (mountroot == NULL || ((*mountroot)() != 0)) 494 panic("cannot mount root"); 495 496 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 497 498 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 499 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 500 panic("cannot find root vnode"); 501 p->p_fd->fd_cdir = rootvnode; 502 vref(p->p_fd->fd_cdir); 503 VOP_UNLOCK(rootvnode); 504 p->p_fd->fd_rdir = NULL; 505 506 /* 507 * Now that root is mounted, we can fixup initprocess's CWD 508 * info. All other processes are kthreads, which merely 509 * share proc0's CWD info. 510 */ 511 initprocess->ps_fd->fd_cdir = rootvnode; 512 vref(initprocess->ps_fd->fd_cdir); 513 initprocess->ps_fd->fd_rdir = NULL; 514 515 /* 516 * Now can look at time, having had a chance to verify the time 517 * from the file system. Reset p->p_rtime as it may have been 518 * munched in mi_switch() after the time got set. 519 */ 520 LIST_FOREACH(pr, &allprocess, ps_list) { 521 nanouptime(&pr->ps_start); 522 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 523 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 524 timespecclear(&p->p_rtime); 525 } 526 } 527 528 uvm_swap_init(); 529 530 /* Create the pageout daemon kernel thread. */ 531 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 532 panic("fork pagedaemon"); 533 534 /* Create the reaper daemon kernel thread. */ 535 if (kthread_create(reaper, NULL, &reaperproc, "reaper")) 536 panic("fork reaper"); 537 538 /* Create the cleaner daemon kernel thread. */ 539 if (kthread_create(buf_daemon, NULL, &cleanerproc, "cleaner")) 540 panic("fork cleaner"); 541 542 /* Create the update daemon kernel thread. */ 543 if (kthread_create(syncer_thread, NULL, &syncerproc, "update")) 544 panic("fork update"); 545 546 /* Create the aiodone daemon kernel thread. */ 547 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 548 panic("fork aiodoned"); 549 550 #if !defined(__hppa__) 551 /* Create the page zeroing kernel thread. */ 552 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 553 panic("fork zerothread"); 554 #endif 555 556 #if defined(MULTIPROCESSOR) 557 /* Boot the secondary processors. */ 558 cpu_boot_secondary_processors(); 559 #endif 560 561 /* Now that all CPUs partake in scheduling, start SMR thread. */ 562 smr_startup_thread(); 563 564 config_process_deferred_mountroot(); 565 566 /* 567 * Okay, now we can let init(8) exec! It's off to userland! 568 */ 569 start_init_exec = 1; 570 wakeup((void *)&start_init_exec); 571 572 /* 573 * Start the idle pool page garbage collector 574 */ 575 #if !(defined(__m88k__) && defined(MULTIPROCESSOR)) /* XXX */ 576 pool_gc_pages(NULL); 577 #endif 578 579 start_periodic_resettodr(); 580 581 /* 582 * proc0: nothing to do, back to sleep 583 */ 584 while (1) 585 tsleep_nsec(&proc0, PVM, "scheduler", INFSLP); 586 /* NOTREACHED */ 587 } 588 589 /* 590 * List of paths to try when searching for "init". 591 */ 592 static char *initpaths[] = { 593 "/sbin/init", 594 "/sbin/oinit", 595 "/sbin/init.bak", 596 NULL, 597 }; 598 599 void 600 check_console(struct proc *p) 601 { 602 struct nameidata nd; 603 int error; 604 605 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 606 error = namei(&nd); 607 if (error) { 608 if (error == ENOENT) 609 printf("warning: /dev/console does not exist\n"); 610 else 611 printf("warning: /dev/console error %d\n", error); 612 } else 613 vrele(nd.ni_vp); 614 } 615 616 /* 617 * Start the initial user process; try exec'ing each pathname in "initpaths". 618 * The program is invoked with one argument containing the boot flags. 619 */ 620 void 621 start_init(void *arg) 622 { 623 struct proc *p = arg; 624 vaddr_t addr; 625 struct sys_execve_args /* { 626 syscallarg(const char *) path; 627 syscallarg(char *const *) argp; 628 syscallarg(char *const *) envp; 629 } */ args; 630 int options, error; 631 long i; 632 register_t retval[2]; 633 char flags[4], *flagsp; 634 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 635 636 /* 637 * Now in process 1. 638 */ 639 640 /* 641 * Wait for main() to tell us that it's safe to exec. 642 */ 643 while (start_init_exec == 0) 644 tsleep_nsec(&start_init_exec, PWAIT, "initexec", INFSLP); 645 646 check_console(p); 647 648 /* process 0 ignores SIGCHLD, but we can't */ 649 p->p_p->ps_sigacts->ps_sigflags = 0; 650 651 /* 652 * Need just enough stack to hold the faked-up "execve()" arguments. 653 */ 654 #ifdef MACHINE_STACK_GROWS_UP 655 addr = USRSTACK; 656 #else 657 addr = USRSTACK - PAGE_SIZE; 658 #endif 659 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 660 p->p_vmspace->vm_minsaddr = (caddr_t)(addr + PAGE_SIZE); 661 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 662 NULL, UVM_UNKNOWN_OFFSET, 0, 663 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, MAP_INHERIT_COPY, 664 MADV_NORMAL, 665 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW|UVM_FLAG_STACK|UVM_FLAG_SYSCALL))) 666 panic("init: couldn't allocate argument space"); 667 668 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 669 #ifdef MACHINE_STACK_GROWS_UP 670 ucp = (char *)addr; 671 #else 672 ucp = (char *)(addr + PAGE_SIZE); 673 #endif 674 /* 675 * Construct the boot flag argument. 676 */ 677 flagsp = flags; 678 *flagsp++ = '-'; 679 options = 0; 680 681 if (boothowto & RB_SINGLE) { 682 *flagsp++ = 's'; 683 options = 1; 684 } 685 #ifdef notyet 686 if (boothowto & RB_FASTBOOT) { 687 *flagsp++ = 'f'; 688 options = 1; 689 } 690 #endif 691 692 /* 693 * Move out the flags (arg 1), if necessary. 694 */ 695 if (options != 0) { 696 *flagsp++ = '\0'; 697 i = flagsp - flags; 698 #ifdef DEBUG 699 printf("init: copying out flags `%s' %ld\n", flags, i); 700 #endif 701 #ifdef MACHINE_STACK_GROWS_UP 702 arg1 = ucp; 703 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 704 ucp += i; 705 #else 706 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 707 arg1 = ucp; 708 #endif 709 } 710 711 /* 712 * Move out the file name (also arg 0). 713 */ 714 i = strlen(path) + 1; 715 #ifdef DEBUG 716 printf("init: copying out path `%s' %ld\n", path, i); 717 #endif 718 #ifdef MACHINE_STACK_GROWS_UP 719 arg0 = ucp; 720 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 721 ucp += i; 722 ucp = (caddr_t)ALIGN((u_long)ucp); 723 uap = (char **)ucp + 3; 724 #else 725 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 726 arg0 = ucp; 727 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 728 #endif 729 730 /* 731 * Move out the arg pointers. 732 */ 733 i = 0; 734 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 735 if (options != 0) 736 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 737 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 738 739 /* 740 * Point at the arguments. 741 */ 742 SCARG(&args, path) = arg0; 743 SCARG(&args, argp) = uap; 744 SCARG(&args, envp) = NULL; 745 746 /* 747 * Now try to exec the program. If can't for any reason 748 * other than it doesn't exist, complain. 749 */ 750 if ((error = sys_execve(p, &args, retval)) == 0) { 751 KERNEL_UNLOCK(); 752 return; 753 } 754 if (error != ENOENT) 755 printf("exec %s: error %d\n", path, error); 756 } 757 printf("init: not found\n"); 758 panic("no init"); 759 } 760