1 /* $OpenBSD: init_main.c,v 1.283 2019/01/19 01:53:44 cheloha 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 int db_active = 0; 127 int ncpus = 1; 128 int ncpusfound = 1; /* number of cpus we find */ 129 volatile int start_init_exec; /* semaphore for start_init() */ 130 131 #if !defined(NO_PROPOLICE) 132 long __guard_local __attribute__((section(".openbsd.randomdata"))); 133 #endif 134 135 /* XXX return int so gcc -Werror won't complain */ 136 int main(void *); 137 void check_console(struct proc *); 138 void start_init(void *); 139 void crypto_init(void); 140 void db_ctf_init(void); 141 void prof_init(void); 142 void init_exec(void); 143 void kqueue_init(void); 144 void futex_init(void); 145 void taskq_init(void); 146 void timeout_proc_init(void); 147 void pool_gc_pages(void *); 148 void percpu_init(void); 149 150 extern char sigcode[], esigcode[], sigcoderet[]; 151 #ifdef SYSCALL_DEBUG 152 extern char *syscallnames[]; 153 #endif 154 155 struct emul emul_native = { 156 "native", 157 NULL, 158 SYS_syscall, 159 SYS_MAXSYSCALL, 160 sysent, 161 #ifdef SYSCALL_DEBUG 162 syscallnames, 163 #else 164 NULL, 165 #endif 166 0, 167 copyargs, 168 setregs, 169 NULL, /* fixup */ 170 NULL, /* coredump */ 171 sigcode, 172 esigcode, 173 sigcoderet 174 }; 175 176 #ifdef DIAGNOSTIC 177 int pdevinit_done = 0; 178 #endif 179 180 /* 181 * System startup; initialize the world, create process 0, mount root 182 * filesystem, and fork to create init and pagedaemon. Most of the 183 * hard work is done in the lower-level initialization routines including 184 * startup(), which does memory initialization and autoconfiguration. 185 */ 186 /* XXX return int, so gcc -Werror won't complain */ 187 int 188 main(void *framep) 189 { 190 struct proc *p; 191 struct process *pr; 192 struct pdevinit *pdev; 193 quad_t lim; 194 int i; 195 extern struct pdevinit pdevinit[]; 196 extern void disk_init(void); 197 198 /* 199 * Initialize the current process pointer (curproc) before 200 * any possible traps/probes to simplify trap processing. 201 */ 202 curproc = p = &proc0; 203 p->p_cpu = curcpu(); 204 205 /* 206 * Initialize timeouts. 207 */ 208 timeout_startup(); 209 210 /* 211 * Attempt to find console and initialize 212 * in case of early panic or other messages. 213 */ 214 config_init(); /* init autoconfiguration data structures */ 215 consinit(); 216 217 printf("%s\n", copyright); 218 219 WITNESS_INITIALIZE(); 220 221 KERNEL_LOCK_INIT(); 222 SCHED_LOCK_INIT(); 223 224 uvm_init(); 225 disk_init(); /* must come before autoconfiguration */ 226 tty_init(); /* initialise tty's */ 227 cpu_startup(); 228 229 random_start(); /* Start the flow */ 230 231 /* 232 * Initialize mbuf's. Do this now because we might attempt to 233 * allocate mbufs or mbuf clusters during autoconfiguration. 234 */ 235 mbinit(); 236 237 /* Initialize sockets. */ 238 soinit(); 239 240 /* Initialize SRP subsystem. */ 241 srp_startup(); 242 243 /* 244 * Initialize process and pgrp structures. 245 */ 246 procinit(); 247 248 /* Initialize file locking. */ 249 lf_init(); 250 251 /* 252 * Initialize filedescriptors. 253 */ 254 filedesc_init(); 255 256 /* 257 * Initialize pipes. 258 */ 259 pipe_init(); 260 261 /* 262 * Initialize kqueues. 263 */ 264 kqueue_init(); 265 266 /* 267 * Initialize futexes. 268 */ 269 futex_init(); 270 271 /* Create credentials. */ 272 p->p_ucred = crget(); 273 p->p_ucred->cr_ngroups = 1; /* group 0 */ 274 275 /* 276 * Create process 0 (the swapper). 277 */ 278 pr = &process0; 279 process_initialize(pr, p); 280 281 LIST_INSERT_HEAD(&allprocess, pr, ps_list); 282 LIST_INSERT_HEAD(PIDHASH(0), pr, ps_hash); 283 atomic_setbits_int(&pr->ps_flags, PS_SYSTEM); 284 285 /* Set the default routing table/domain. */ 286 process0.ps_rtableid = 0; 287 288 LIST_INSERT_HEAD(&allproc, p, p_list); 289 pr->ps_pgrp = &pgrp0; 290 LIST_INSERT_HEAD(TIDHASH(0), p, p_hash); 291 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 292 LIST_INIT(&pgrp0.pg_members); 293 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 294 295 pgrp0.pg_session = &session0; 296 session0.s_count = 1; 297 session0.s_leader = pr; 298 299 atomic_setbits_int(&p->p_flag, P_SYSTEM); 300 p->p_stat = SONPROC; 301 pr->ps_nice = NZERO; 302 pr->ps_emul = &emul_native; 303 strlcpy(pr->ps_comm, "swapper", sizeof(pr->ps_comm)); 304 305 /* Init timeouts. */ 306 timeout_set(&p->p_sleep_to, endtsleep, p); 307 308 /* Initialize signal state for process 0. */ 309 signal_init(); 310 pr->ps_sigacts = &sigacts0; 311 siginit(pr); 312 313 /* Create the file descriptor table. */ 314 p->p_fd = pr->ps_fd = fdinit(); 315 316 /* Create the limits structures. */ 317 pr->ps_limit = &limit0; 318 for (i = 0; i < nitems(p->p_rlimit); i++) 319 limit0.pl_rlimit[i].rlim_cur = 320 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 321 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 322 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 323 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 324 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 325 lim = ptoa(uvmexp.free); 326 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 327 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 328 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 329 limit0.p_refcnt = 1; 330 331 /* Allocate a prototype map so we have something to fork. */ 332 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 333 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 334 p->p_vmspace = pr->ps_vmspace = &vmspace0; 335 336 p->p_addr = proc0paddr; /* XXX */ 337 338 /* 339 * Charge root for one process. 340 */ 341 (void)chgproccnt(0, 1); 342 343 /* Initialize run queues */ 344 sched_init_runqueues(); 345 sleep_queue_init(); 346 sched_init_cpu(curcpu()); 347 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 348 349 /* Initialize timeouts in process context. */ 350 timeout_proc_init(); 351 352 /* Initialize task queues */ 353 taskq_init(); 354 355 /* Initialize the interface/address trees */ 356 ifinit(); 357 358 /* Lock the kernel on behalf of proc0. */ 359 KERNEL_LOCK(); 360 361 #if NMPATH > 0 362 /* Attach mpath before hardware */ 363 config_rootfound("mpath", NULL); 364 #endif 365 366 /* Configure the devices */ 367 cpu_configure(); 368 369 /* Configure virtual memory system, set vm rlimits. */ 370 uvm_init_limits(p); 371 372 /* Per CPU memory allocation */ 373 percpu_init(); 374 375 /* Initialize the file systems. */ 376 #if defined(NFSSERVER) || defined(NFSCLIENT) 377 nfs_init(); /* initialize server/shared data */ 378 #endif 379 vfsinit(); 380 381 /* Start real time and statistics clocks. */ 382 initclocks(); 383 384 #ifdef SYSVSHM 385 /* Initialize System V style shared memory. */ 386 shminit(); 387 #endif 388 389 #ifdef SYSVSEM 390 /* Initialize System V style semaphores. */ 391 seminit(); 392 #endif 393 394 #ifdef SYSVMSG 395 /* Initialize System V style message queues. */ 396 msginit(); 397 #endif 398 399 /* Create default routing table before attaching lo0. */ 400 rtable_init(); 401 402 /* Attach pseudo-devices. */ 403 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 404 if (pdev->pdev_count > 0) 405 (*pdev->pdev_attach)(pdev->pdev_count); 406 #ifdef DIAGNOSTIC 407 pdevinit_done = 1; 408 #endif 409 410 #ifdef CRYPTO 411 crypto_init(); 412 swcr_init(); 413 #endif /* CRYPTO */ 414 415 /* 416 * Initialize protocols. 417 */ 418 domaininit(); 419 420 initconsbuf(); 421 422 #if defined(GPROF) || defined(DDBPROF) 423 /* Initialize kernel profiling. */ 424 prof_init(); 425 #endif 426 427 mbcpuinit(); /* enable per cpu mbuf data */ 428 429 /* init exec and emul */ 430 init_exec(); 431 432 /* Start the scheduler */ 433 scheduler_start(); 434 435 /* 436 * Create process 1 (init(8)). We do this now, as Unix has 437 * historically had init be process 1, and changing this would 438 * probably upset a lot of people. 439 * 440 * Note that process 1 won't immediately exec init(8), but will 441 * wait for us to inform it that the root file system has been 442 * mounted. 443 */ 444 { 445 struct proc *initproc; 446 447 if (fork1(p, FORK_FORK, start_init, NULL, NULL, &initproc)) 448 panic("fork init"); 449 initprocess = initproc->p_p; 450 } 451 452 randompid = 1; 453 454 /* 455 * Create any kernel threads whose creation was deferred because 456 * initprocess had not yet been created. 457 */ 458 kthread_run_deferred_queue(); 459 460 /* 461 * Now that device driver threads have been created, wait for 462 * them to finish any deferred autoconfiguration. Note we don't 463 * need to lock this semaphore, since we haven't booted any 464 * secondary processors, yet. 465 */ 466 while (config_pending) 467 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 468 469 dostartuphooks(); 470 471 #if NVSCSI > 0 472 config_rootfound("vscsi", NULL); 473 #endif 474 #if NSOFTRAID > 0 475 config_rootfound("softraid", NULL); 476 #endif 477 478 /* Configure root/swap devices */ 479 diskconf(); 480 481 #ifdef DDB 482 /* Make debug symbols available in ddb. */ 483 db_ctf_init(); 484 #endif 485 486 if (mountroot == NULL || ((*mountroot)() != 0)) 487 panic("cannot mount root"); 488 489 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 490 491 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 492 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 493 panic("cannot find root vnode"); 494 p->p_fd->fd_cdir = rootvnode; 495 vref(p->p_fd->fd_cdir); 496 VOP_UNLOCK(rootvnode); 497 p->p_fd->fd_rdir = NULL; 498 499 /* 500 * Now that root is mounted, we can fixup initprocess's CWD 501 * info. All other processes are kthreads, which merely 502 * share proc0's CWD info. 503 */ 504 initprocess->ps_fd->fd_cdir = rootvnode; 505 vref(initprocess->ps_fd->fd_cdir); 506 initprocess->ps_fd->fd_rdir = NULL; 507 508 /* 509 * Now can look at time, having had a chance to verify the time 510 * from the file system. Reset p->p_rtime as it may have been 511 * munched in mi_switch() after the time got set. 512 */ 513 LIST_FOREACH(pr, &allprocess, ps_list) { 514 getnanotime(&pr->ps_start); 515 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 516 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 517 timespecclear(&p->p_rtime); 518 } 519 } 520 521 uvm_swap_init(); 522 523 /* Create the pageout daemon kernel thread. */ 524 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 525 panic("fork pagedaemon"); 526 527 /* Create the reaper daemon kernel thread. */ 528 if (kthread_create(reaper, NULL, &reaperproc, "reaper")) 529 panic("fork reaper"); 530 531 /* Create the cleaner daemon kernel thread. */ 532 if (kthread_create(buf_daemon, NULL, &cleanerproc, "cleaner")) 533 panic("fork cleaner"); 534 535 /* Create the update daemon kernel thread. */ 536 if (kthread_create(syncer_thread, NULL, &syncerproc, "update")) 537 panic("fork update"); 538 539 /* Create the aiodone daemon kernel thread. */ 540 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 541 panic("fork aiodoned"); 542 543 #if !defined(__hppa__) 544 /* Create the page zeroing kernel thread. */ 545 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 546 panic("fork zerothread"); 547 #endif 548 549 #if defined(MULTIPROCESSOR) 550 /* Boot the secondary processors. */ 551 cpu_boot_secondary_processors(); 552 #endif 553 554 config_process_deferred_mountroot(); 555 556 /* 557 * Okay, now we can let init(8) exec! It's off to userland! 558 */ 559 start_init_exec = 1; 560 wakeup((void *)&start_init_exec); 561 562 /* 563 * Start the idle pool page garbage collector 564 */ 565 #if !(defined(__m88k__) && defined(MULTIPROCESSOR)) /* XXX */ 566 pool_gc_pages(NULL); 567 #endif 568 569 start_periodic_resettodr(); 570 571 /* 572 * proc0: nothing to do, back to sleep 573 */ 574 while (1) 575 tsleep(&proc0, PVM, "scheduler", 0); 576 /* NOTREACHED */ 577 } 578 579 /* 580 * List of paths to try when searching for "init". 581 */ 582 static char *initpaths[] = { 583 "/sbin/init", 584 "/sbin/oinit", 585 "/sbin/init.bak", 586 NULL, 587 }; 588 589 void 590 check_console(struct proc *p) 591 { 592 struct nameidata nd; 593 int error; 594 595 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 596 error = namei(&nd); 597 if (error) { 598 if (error == ENOENT) 599 printf("warning: /dev/console does not exist\n"); 600 else 601 printf("warning: /dev/console error %d\n", error); 602 } else 603 vrele(nd.ni_vp); 604 } 605 606 /* 607 * Start the initial user process; try exec'ing each pathname in "initpaths". 608 * The program is invoked with one argument containing the boot flags. 609 */ 610 void 611 start_init(void *arg) 612 { 613 struct proc *p = arg; 614 vaddr_t addr; 615 struct sys_execve_args /* { 616 syscallarg(const char *) path; 617 syscallarg(char *const *) argp; 618 syscallarg(char *const *) envp; 619 } */ args; 620 int options, error; 621 long i; 622 register_t retval[2]; 623 char flags[4], *flagsp; 624 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 625 626 /* 627 * Now in process 1. 628 */ 629 630 /* 631 * Wait for main() to tell us that it's safe to exec. 632 */ 633 while (start_init_exec == 0) 634 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 635 636 check_console(p); 637 638 /* process 0 ignores SIGCHLD, but we can't */ 639 p->p_p->ps_sigacts->ps_flags = 0; 640 641 /* 642 * Need just enough stack to hold the faked-up "execve()" arguments. 643 */ 644 #ifdef MACHINE_STACK_GROWS_UP 645 addr = USRSTACK; 646 #else 647 addr = USRSTACK - PAGE_SIZE; 648 #endif 649 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 650 p->p_vmspace->vm_minsaddr = (caddr_t)(addr + PAGE_SIZE); 651 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 652 NULL, UVM_UNKNOWN_OFFSET, 0, 653 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, MAP_INHERIT_COPY, 654 MADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW|UVM_FLAG_STACK))) 655 panic("init: couldn't allocate argument space"); 656 657 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 658 #ifdef MACHINE_STACK_GROWS_UP 659 ucp = (char *)addr; 660 #else 661 ucp = (char *)(addr + PAGE_SIZE); 662 #endif 663 /* 664 * Construct the boot flag argument. 665 */ 666 flagsp = flags; 667 *flagsp++ = '-'; 668 options = 0; 669 670 if (boothowto & RB_SINGLE) { 671 *flagsp++ = 's'; 672 options = 1; 673 } 674 #ifdef notyet 675 if (boothowto & RB_FASTBOOT) { 676 *flagsp++ = 'f'; 677 options = 1; 678 } 679 #endif 680 681 /* 682 * Move out the flags (arg 1), if necessary. 683 */ 684 if (options != 0) { 685 *flagsp++ = '\0'; 686 i = flagsp - flags; 687 #ifdef DEBUG 688 printf("init: copying out flags `%s' %ld\n", flags, i); 689 #endif 690 #ifdef MACHINE_STACK_GROWS_UP 691 arg1 = ucp; 692 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 693 ucp += i; 694 #else 695 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 696 arg1 = ucp; 697 #endif 698 } 699 700 /* 701 * Move out the file name (also arg 0). 702 */ 703 i = strlen(path) + 1; 704 #ifdef DEBUG 705 printf("init: copying out path `%s' %ld\n", path, i); 706 #endif 707 #ifdef MACHINE_STACK_GROWS_UP 708 arg0 = ucp; 709 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 710 ucp += i; 711 ucp = (caddr_t)ALIGN((u_long)ucp); 712 uap = (char **)ucp + 3; 713 #else 714 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 715 arg0 = ucp; 716 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 717 #endif 718 719 /* 720 * Move out the arg pointers. 721 */ 722 i = 0; 723 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 724 if (options != 0) 725 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 726 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 727 728 /* 729 * Point at the arguments. 730 */ 731 SCARG(&args, path) = arg0; 732 SCARG(&args, argp) = uap; 733 SCARG(&args, envp) = NULL; 734 735 /* 736 * Now try to exec the program. If can't for any reason 737 * other than it doesn't exist, complain. 738 */ 739 if ((error = sys_execve(p, &args, retval)) == 0) { 740 KERNEL_UNLOCK(); 741 return; 742 } 743 if (error != ENOENT) 744 printf("exec %s: error %d\n", path, error); 745 } 746 printf("init: not found\n"); 747 panic("no init"); 748 } 749