1 /* $NetBSD: init_main.c,v 1.222 2003/07/30 18:45:32 jonathan Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 5 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: init_main.c,v 1.222 2003/07/30 18:45:32 jonathan Exp $"); 46 47 #include "fs_nfs.h" 48 #include "opt_nfsserver.h" 49 #include "opt_sysv.h" 50 #include "opt_maxuprc.h" 51 #include "opt_multiprocessor.h" 52 #include "opt_pipe.h" 53 #include "opt_syscall_debug.h" 54 #include "opt_systrace.h" 55 #include "opt_posix.h" 56 57 #include "opencrypto.h" 58 #include "rnd.h" 59 60 #include <sys/param.h> 61 #include <sys/acct.h> 62 #include <sys/filedesc.h> 63 #include <sys/file.h> 64 #include <sys/errno.h> 65 #include <sys/callout.h> 66 #include <sys/kernel.h> 67 #include <sys/mount.h> 68 #include <sys/proc.h> 69 #include <sys/kthread.h> 70 #include <sys/resourcevar.h> 71 #include <sys/signalvar.h> 72 #include <sys/systm.h> 73 #include <sys/vnode.h> 74 #include <sys/tty.h> 75 #include <sys/conf.h> 76 #include <sys/disklabel.h> 77 #include <sys/buf.h> 78 #include <sys/device.h> 79 #include <sys/disk.h> 80 #include <sys/exec.h> 81 #include <sys/socketvar.h> 82 #include <sys/protosw.h> 83 #include <sys/reboot.h> 84 #include <sys/user.h> 85 #include <sys/sysctl.h> 86 #include <sys/event.h> 87 #ifdef SYSVSHM 88 #include <sys/shm.h> 89 #endif 90 #ifdef SYSVSEM 91 #include <sys/sem.h> 92 #endif 93 #ifdef SYSVMSG 94 #include <sys/msg.h> 95 #endif 96 #ifdef P1003_1B_SEMAPHORE 97 #include <sys/ksem.h> 98 #endif 99 #ifdef SYSTRACE 100 #include <sys/systrace.h> 101 #endif 102 #include <sys/domain.h> 103 #include <sys/mbuf.h> 104 #include <sys/namei.h> 105 #if NOPENCRYPTO > 0 106 #include <opencrypto/cryptodev.h> /* XXX really the framework */ 107 #endif 108 #if NRND > 0 109 #include <sys/rnd.h> 110 #endif 111 #ifndef PIPE_SOCKETPAIR 112 #include <sys/pipe.h> 113 #endif 114 #ifdef LKM 115 #include <sys/lkm.h> 116 #endif 117 118 #include <sys/syscall.h> 119 #include <sys/sa.h> 120 #include <sys/syscallargs.h> 121 122 #include <ufs/ufs/quota.h> 123 124 #include <miscfs/genfs/genfs.h> 125 #include <miscfs/syncfs/syncfs.h> 126 127 #include <machine/cpu.h> 128 129 #include <uvm/uvm.h> 130 131 #include <dev/cons.h> 132 133 #include <net/if.h> 134 #include <net/raw_cb.h> 135 136 const char copyright[] = 137 "Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003\n" 138 " The NetBSD Foundation, Inc. All rights reserved.\n" 139 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 140 " The Regents of the University of California. All rights reserved.\n" 141 "\n"; 142 143 /* Components of the first process -- never freed. */ 144 struct session session0; 145 struct pgrp pgrp0; 146 struct proc proc0; 147 struct lwp lwp0; 148 struct pcred cred0; 149 struct filedesc0 filedesc0; 150 struct cwdinfo cwdi0; 151 struct plimit limit0; 152 struct pstats pstat0; 153 struct vmspace vmspace0; 154 struct sigacts sigacts0; 155 #ifndef curlwp 156 struct lwp *curlwp = &lwp0; 157 #endif 158 struct proc *initproc; 159 160 int nofile = NOFILE; 161 int maxuprc = MAXUPRC; 162 int cmask = CMASK; 163 extern struct user *proc0paddr; 164 165 struct vnode *rootvp, *swapdev_vp; 166 int boothowto; 167 int cold = 1; /* still working on startup */ 168 struct timeval boottime; 169 170 __volatile int start_init_exec; /* semaphore for start_init() */ 171 172 static void check_console(struct proc *p); 173 static void start_init(void *); 174 void main(void); 175 176 extern const struct emul emul_netbsd; /* defined in kern_exec.c */ 177 178 /* 179 * System startup; initialize the world, create process 0, mount root 180 * filesystem, and fork to create init and pagedaemon. Most of the 181 * hard work is done in the lower-level initialization routines including 182 * startup(), which does memory initialization and autoconfiguration. 183 */ 184 void 185 main(void) 186 { 187 struct lwp *l; 188 struct proc *p; 189 struct pdevinit *pdev; 190 int s, error; 191 u_int i; 192 rlim_t lim; 193 extern struct pdevinit pdevinit[]; 194 extern void schedcpu(void *); 195 #if defined(NFSSERVER) || defined(NFS) 196 extern void nfs_init(void); 197 #endif 198 #ifdef NVNODE_IMPLICIT 199 int usevnodes; 200 #endif 201 202 /* 203 * Initialize the current LWP pointer (curlwp) before 204 * any possible traps/probes to simplify trap processing. 205 */ 206 simple_lock_init(&proc0.p_raslock); 207 l = &lwp0; 208 curlwp = l; 209 l->l_cpu = curcpu(); 210 l->l_proc = &proc0; 211 l->l_lid = 1; 212 /* 213 * Attempt to find console and initialize 214 * in case of early panic or other messages. 215 */ 216 consinit(); 217 printf("%s", copyright); 218 219 KERNEL_LOCK_INIT(); 220 221 uvm_init(); 222 223 /* Do machine-dependent initialization. */ 224 cpu_startup(); 225 226 /* Initialize callouts. */ 227 callout_startup(); 228 229 /* 230 * Initialize mbuf's. Do this now because we might attempt to 231 * allocate mbufs or mbuf clusters during autoconfiguration. 232 */ 233 mbinit(); 234 235 /* Initialize kqueues. */ 236 kqueue_init(); 237 238 /* Initialize sockets. */ 239 soinit(); 240 241 /* 242 * The following things must be done before autoconfiguration. 243 */ 244 evcnt_init(); /* initialize event counters */ 245 disk_init(); /* initialize disk list */ 246 tty_init(); /* initialize tty list */ 247 #if NRND > 0 248 rnd_init(); /* initialize RNG */ 249 #endif 250 #if NOPENCRYPTO > 0 251 /* Initialize crypto subsystem before configuring crypto hardware. */ 252 (void)crypto_init(); 253 #endif 254 /* Initialize the sysctl subsystem. */ 255 sysctl_init(); 256 257 /* 258 * Initialize process and pgrp structures. 259 */ 260 procinit(); 261 262 #ifdef LKM 263 /* Initialize the LKM system. */ 264 lkm_init(); 265 #endif 266 267 /* 268 * Create process 0 (the swapper). 269 */ 270 p = &proc0; 271 proc0_insert(p, l, &pgrp0, &session0); 272 273 /* 274 * Set P_NOCLDWAIT so that kernel threads are reparented to 275 * init(8) when they exit. init(8) can easily wait them out 276 * for us. 277 */ 278 p->p_flag = P_SYSTEM | P_NOCLDWAIT; 279 p->p_stat = SACTIVE; 280 p->p_nice = NZERO; 281 p->p_emul = &emul_netbsd; 282 #ifdef __HAVE_SYSCALL_INTERN 283 (*p->p_emul->e_syscall_intern)(p); 284 #endif 285 strncpy(p->p_comm, "swapper", MAXCOMLEN); 286 287 l->l_flag = L_INMEM; 288 l->l_stat = LSONPROC; 289 p->p_nrlwps = 1; 290 291 callout_init(&l->l_tsleep_ch); 292 293 /* Create credentials. */ 294 cred0.p_refcnt = 1; 295 p->p_cred = &cred0; 296 p->p_ucred = crget(); 297 p->p_ucred->cr_ngroups = 1; /* group 0 */ 298 299 /* Create the file descriptor table. */ 300 finit(); 301 p->p_fd = &filedesc0.fd_fd; 302 fdinit1(&filedesc0); 303 304 /* Create the CWD info. */ 305 p->p_cwdi = &cwdi0; 306 cwdi0.cwdi_cmask = cmask; 307 cwdi0.cwdi_refcnt = 1; 308 309 /* Create the limits structures. */ 310 p->p_limit = &limit0; 311 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 312 limit0.pl_rlimit[i].rlim_cur = 313 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 314 315 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 316 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = 317 maxfiles < nofile ? maxfiles : nofile; 318 319 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 320 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = 321 maxproc < maxuprc ? maxproc : maxuprc; 322 323 lim = ptoa(uvmexp.free); 324 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 325 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 326 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 327 limit0.pl_corename = defcorename; 328 limit0.p_refcnt = 1; 329 330 /* 331 * Initialize proc0's vmspace, which uses the kernel pmap. 332 * All kernel processes (which never have user space mappings) 333 * share proc0's vmspace, and thus, the kernel pmap. 334 */ 335 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 336 trunc_page(VM_MAX_ADDRESS)); 337 p->p_vmspace = &vmspace0; 338 339 l->l_addr = proc0paddr; /* XXX */ 340 341 p->p_stats = &pstat0; 342 343 /* 344 * Charge root for one process. 345 */ 346 (void)chgproccnt(0, 1); 347 348 rqinit(); 349 350 /* Configure virtual memory system, set vm rlimits. */ 351 uvm_init_limits(p); 352 353 /* Initialize the file systems. */ 354 #if defined(NFSSERVER) || defined(NFS) 355 nfs_init(); /* initialize server/shared data */ 356 #endif 357 #ifdef NVNODE_IMPLICIT 358 /* 359 * If maximum number of vnodes in namei vnode cache is not explicitly 360 * defined in kernel config, adjust the number such as we use roughly 361 * 0.5% of memory for vnode cache (but not less than NVNODE vnodes). 362 */ 363 usevnodes = (ptoa((unsigned)physmem) / 200) / sizeof(struct vnode); 364 if (usevnodes > desiredvnodes) 365 desiredvnodes = usevnodes; 366 #endif 367 vfsinit(); 368 369 /* Configure the system hardware. This will enable interrupts. */ 370 configure(); 371 372 ubc_init(); /* must be after autoconfig */ 373 374 /* Lock the kernel on behalf of proc0. */ 375 KERNEL_PROC_LOCK(l); 376 377 #ifdef SYSVSHM 378 /* Initialize System V style shared memory. */ 379 shminit(); 380 #endif 381 382 #ifdef SYSVSEM 383 /* Initialize System V style semaphores. */ 384 seminit(); 385 #endif 386 387 #ifdef SYSVMSG 388 /* Initialize System V style message queues. */ 389 msginit(); 390 #endif 391 392 393 #ifdef P1003_1B_SEMAPHORE 394 /* Initialize posix semaphores */ 395 ksem_init(); 396 #endif 397 /* Attach pseudo-devices. */ 398 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 399 (*pdev->pdev_attach)(pdev->pdev_count); 400 401 /* 402 * Initialize protocols. Block reception of incoming packets 403 * until everything is ready. 404 */ 405 s = splnet(); 406 ifinit(); 407 domaininit(); 408 if_attachdomain(); 409 splx(s); 410 411 #ifdef GPROF 412 /* Initialize kernel profiling. */ 413 kmstartup(); 414 #endif 415 416 /* Initialize system accouting. */ 417 acct_init(); 418 419 #ifdef SYSTRACE 420 systrace_init(); 421 #endif 422 /* 423 * Initialize signal-related data structures, and signal state 424 * for proc0. 425 */ 426 signal_init(); 427 p->p_sigacts = &sigacts0; 428 siginit(p); 429 430 /* Kick off timeout driven events by calling first time. */ 431 schedcpu(NULL); 432 433 /* 434 * Create process 1 (init(8)). We do this now, as Unix has 435 * historically had init be process 1, and changing this would 436 * probably upset a lot of people. 437 * 438 * Note that process 1 won't immediately exec init(8), but will 439 * wait for us to inform it that the root file system has been 440 * mounted. 441 */ 442 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 443 panic("fork init"); 444 445 /* 446 * Create any kernel threads who's creation was deferred because 447 * initproc had not yet been created. 448 */ 449 kthread_run_deferred_queue(); 450 451 /* 452 * Now that device driver threads have been created, wait for 453 * them to finish any deferred autoconfiguration. Note we don't 454 * need to lock this semaphore, since we haven't booted any 455 * secondary processors, yet. 456 */ 457 while (config_pending) 458 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 459 460 /* 461 * Finalize configuration now that all real devices have been 462 * found. This needs to be done before the root device is 463 * selected, since finalization may create the root device. 464 */ 465 config_finalize(); 466 467 /* 468 * Now that autoconfiguration has completed, we can determine 469 * the root and dump devices. 470 */ 471 cpu_rootconf(); 472 cpu_dumpconf(); 473 474 /* Mount the root file system. */ 475 do { 476 domountroothook(); 477 if ((error = vfs_mountroot())) { 478 printf("cannot mount root, error = %d\n", error); 479 boothowto |= RB_ASKNAME; 480 setroot(root_device, 481 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 482 } 483 } while (error != 0); 484 mountroothook_destroy(); 485 486 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 487 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 488 489 /* 490 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 491 * reference it. 492 */ 493 if (VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode)) 494 panic("cannot find root vnode"); 495 cwdi0.cwdi_cdir = rootvnode; 496 VREF(cwdi0.cwdi_cdir); 497 VOP_UNLOCK(rootvnode, 0); 498 cwdi0.cwdi_rdir = NULL; 499 500 /* 501 * Now that root is mounted, we can fixup initproc's CWD 502 * info. All other processes are kthreads, which merely 503 * share proc0's CWD info. 504 */ 505 initproc->p_cwdi->cwdi_cdir = rootvnode; 506 VREF(initproc->p_cwdi->cwdi_cdir); 507 initproc->p_cwdi->cwdi_rdir = NULL; 508 509 /* 510 * Now can look at time, having had a chance to verify the time 511 * from the file system. Reset p->p_rtime as it may have been 512 * munched in mi_switch() after the time got set. 513 */ 514 proclist_lock_read(); 515 s = splsched(); 516 for (p = LIST_FIRST(&allproc); p != NULL; 517 p = LIST_NEXT(p, p_list)) { 518 p->p_stats->p_start = mono_time = boottime = time; 519 for (l = LIST_FIRST(&p->p_lwps); l != NULL; 520 l = LIST_NEXT(l, l_sibling)) 521 if (l->l_cpu != NULL) 522 l->l_cpu->ci_schedstate.spc_runtime = time; 523 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 524 } 525 splx(s); 526 proclist_unlock_read(); 527 528 /* Create the pageout daemon kernel thread. */ 529 uvm_swap_init(); 530 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 531 panic("fork pagedaemon"); 532 533 /* Create the process reaper kernel thread. */ 534 if (kthread_create1(reaper, NULL, NULL, "reaper")) 535 panic("fork reaper"); 536 537 /* Create the filesystem syncer kernel thread. */ 538 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 539 panic("fork syncer"); 540 541 /* Create the aiodone daemon kernel thread. */ 542 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 543 "aiodoned")) 544 panic("fork aiodoned"); 545 546 #if defined(MULTIPROCESSOR) 547 /* Boot the secondary processors. */ 548 cpu_boot_secondary_processors(); 549 #endif 550 551 /* Initialize exec structures */ 552 exec_init(1); 553 554 #ifndef PIPE_SOCKETPAIR 555 /* Initialize pipe structures */ 556 pipe_init(); 557 #endif 558 559 /* 560 * Okay, now we can let init(8) exec! It's off to userland! 561 */ 562 start_init_exec = 1; 563 wakeup((void *)&start_init_exec); 564 565 /* The scheduler is an infinite loop. */ 566 uvm_scheduler(); 567 /* NOTREACHED */ 568 } 569 570 static void 571 check_console(struct proc *p) 572 { 573 struct nameidata nd; 574 int error; 575 576 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 577 error = namei(&nd); 578 if (error == 0) 579 vrele(nd.ni_vp); 580 else if (error == ENOENT) 581 printf("warning: no /dev/console\n"); 582 else 583 printf("warning: lookup /dev/console: error %d\n", error); 584 } 585 586 /* 587 * List of paths to try when searching for "init". 588 */ 589 static const char *initpaths[] = { 590 "/sbin/init", 591 "/sbin/oinit", 592 "/sbin/init.bak", 593 NULL, 594 }; 595 596 /* 597 * Start the initial user process; try exec'ing each pathname in "initpaths". 598 * The program is invoked with one argument containing the boot flags. 599 */ 600 static void 601 start_init(void *arg) 602 { 603 struct lwp *l = arg; 604 struct proc *p = l->l_proc; 605 vaddr_t addr; 606 struct sys_execve_args /* { 607 syscallarg(const char *) path; 608 syscallarg(char * const *) argp; 609 syscallarg(char * const *) envp; 610 } */ args; 611 int options, i, error; 612 register_t retval[2]; 613 char flags[4], *flagsp; 614 const char *path, *slash; 615 char *ucp, **uap, *arg0, *arg1 = NULL; 616 char ipath[129]; 617 int ipx, len; 618 619 /* 620 * Now in process 1. 621 */ 622 strncpy(p->p_comm, "init", MAXCOMLEN); 623 624 /* 625 * Wait for main() to tell us that it's safe to exec. 626 */ 627 while (start_init_exec == 0) 628 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 629 630 /* 631 * This is not the right way to do this. We really should 632 * hand-craft a descriptor onto /dev/console to hand to init, 633 * but that's a _lot_ more work, and the benefit from this easy 634 * hack makes up for the "good is the enemy of the best" effect. 635 */ 636 check_console(p); 637 638 /* 639 * Need just enough stack to hold the faked-up "execve()" arguments. 640 */ 641 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 642 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 643 NULL, UVM_UNKNOWN_OFFSET, 0, 644 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 645 UVM_ADV_NORMAL, 646 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 647 panic("init: couldn't allocate argument space"); 648 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 649 650 ipx = 0; 651 while (1) { 652 if (boothowto & RB_ASKNAME) { 653 printf("init path"); 654 if (initpaths[ipx]) 655 printf(" (default %s)", initpaths[ipx]); 656 printf(": "); 657 len = cngetsn(ipath, sizeof(ipath)-1); 658 if (len == 0) { 659 if (initpaths[ipx]) 660 path = initpaths[ipx++]; 661 else 662 continue; 663 } else { 664 ipath[len] = '\0'; 665 path = ipath; 666 } 667 } else { 668 if ((path = initpaths[ipx++]) == NULL) 669 break; 670 } 671 672 ucp = (char *)USRSTACK; 673 674 /* 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' %d\n", flags, i); 700 #endif 701 arg1 = STACK_ALLOC(ucp, i); 702 ucp = STACK_MAX(arg1, i); 703 (void)copyout((caddr_t)flags, arg1, i); 704 } 705 706 /* 707 * Move out the file name (also arg 0). 708 */ 709 i = strlen(path) + 1; 710 #ifdef DEBUG 711 printf("init: copying out path `%s' %d\n", path, i); 712 #else 713 if (boothowto & RB_ASKNAME || path != initpaths[0]) 714 printf("init: trying %s\n", path); 715 #endif 716 arg0 = STACK_ALLOC(ucp, i); 717 ucp = STACK_MAX(arg0, i); 718 (void)copyout((caddr_t)path, arg0, i); 719 720 /* 721 * Move out the arg pointers. 722 */ 723 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 724 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 725 SCARG(&args, path) = arg0; 726 SCARG(&args, argp) = uap; 727 SCARG(&args, envp) = NULL; 728 slash = strrchr(path, '/'); 729 if (slash) 730 (void)suword((caddr_t)uap++, 731 (long)arg0 + (slash + 1 - path)); 732 else 733 (void)suword((caddr_t)uap++, (long)arg0); 734 if (options != 0) 735 (void)suword((caddr_t)uap++, (long)arg1); 736 (void)suword((caddr_t)uap++, 0); /* terminator */ 737 738 /* 739 * Now try to exec the program. If can't for any reason 740 * other than it doesn't exist, complain. 741 */ 742 error = sys_execve(LIST_FIRST(&p->p_lwps), &args, retval); 743 if (error == 0 || error == EJUSTRETURN) { 744 KERNEL_PROC_UNLOCK(l); 745 return; 746 } 747 printf("exec %s: error %d\n", path, error); 748 } 749 printf("init: not found\n"); 750 panic("no init"); 751 } 752