1 /* $NetBSD: init_main.c,v 1.223 2003/08/06 20:30:38 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 1.223 2003/08/06 20:30:38 jonathan Exp $"); 46 47 #include "fs_nfs.h" 48 #include "opt_nfsserver.h" 49 #include "opt_ipsec.h" 50 #include "opt_sysv.h" 51 #include "opt_maxuprc.h" 52 #include "opt_multiprocessor.h" 53 #include "opt_pipe.h" 54 #include "opt_syscall_debug.h" 55 #include "opt_systrace.h" 56 #include "opt_posix.h" 57 58 #include "opencrypto.h" 59 #include "rnd.h" 60 61 #include <sys/param.h> 62 #include <sys/acct.h> 63 #include <sys/filedesc.h> 64 #include <sys/file.h> 65 #include <sys/errno.h> 66 #include <sys/callout.h> 67 #include <sys/kernel.h> 68 #include <sys/mount.h> 69 #include <sys/proc.h> 70 #include <sys/kthread.h> 71 #include <sys/resourcevar.h> 72 #include <sys/signalvar.h> 73 #include <sys/systm.h> 74 #include <sys/vnode.h> 75 #include <sys/tty.h> 76 #include <sys/conf.h> 77 #include <sys/disklabel.h> 78 #include <sys/buf.h> 79 #include <sys/device.h> 80 #include <sys/disk.h> 81 #include <sys/exec.h> 82 #include <sys/socketvar.h> 83 #include <sys/protosw.h> 84 #include <sys/reboot.h> 85 #include <sys/user.h> 86 #include <sys/sysctl.h> 87 #include <sys/event.h> 88 #ifdef FAST_IPSEC 89 #include <netipsec/ipsec.h> 90 #endif 91 #ifdef SYSVSHM 92 #include <sys/shm.h> 93 #endif 94 #ifdef SYSVSEM 95 #include <sys/sem.h> 96 #endif 97 #ifdef SYSVMSG 98 #include <sys/msg.h> 99 #endif 100 #ifdef P1003_1B_SEMAPHORE 101 #include <sys/ksem.h> 102 #endif 103 #ifdef SYSTRACE 104 #include <sys/systrace.h> 105 #endif 106 #include <sys/domain.h> 107 #include <sys/mbuf.h> 108 #include <sys/namei.h> 109 #if NOPENCRYPTO > 0 110 #include <opencrypto/cryptodev.h> /* XXX really the framework */ 111 #endif 112 #if NRND > 0 113 #include <sys/rnd.h> 114 #endif 115 #ifndef PIPE_SOCKETPAIR 116 #include <sys/pipe.h> 117 #endif 118 #ifdef LKM 119 #include <sys/lkm.h> 120 #endif 121 122 #include <sys/syscall.h> 123 #include <sys/sa.h> 124 #include <sys/syscallargs.h> 125 126 #include <ufs/ufs/quota.h> 127 128 #include <miscfs/genfs/genfs.h> 129 #include <miscfs/syncfs/syncfs.h> 130 131 #include <machine/cpu.h> 132 133 #include <uvm/uvm.h> 134 135 #include <dev/cons.h> 136 137 #include <net/if.h> 138 #include <net/raw_cb.h> 139 140 const char copyright[] = 141 "Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003\n" 142 " The NetBSD Foundation, Inc. All rights reserved.\n" 143 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 144 " The Regents of the University of California. All rights reserved.\n" 145 "\n"; 146 147 /* Components of the first process -- never freed. */ 148 struct session session0; 149 struct pgrp pgrp0; 150 struct proc proc0; 151 struct lwp lwp0; 152 struct pcred cred0; 153 struct filedesc0 filedesc0; 154 struct cwdinfo cwdi0; 155 struct plimit limit0; 156 struct pstats pstat0; 157 struct vmspace vmspace0; 158 struct sigacts sigacts0; 159 #ifndef curlwp 160 struct lwp *curlwp = &lwp0; 161 #endif 162 struct proc *initproc; 163 164 int nofile = NOFILE; 165 int maxuprc = MAXUPRC; 166 int cmask = CMASK; 167 extern struct user *proc0paddr; 168 169 struct vnode *rootvp, *swapdev_vp; 170 int boothowto; 171 int cold = 1; /* still working on startup */ 172 struct timeval boottime; 173 174 __volatile int start_init_exec; /* semaphore for start_init() */ 175 176 static void check_console(struct proc *p); 177 static void start_init(void *); 178 void main(void); 179 180 extern const struct emul emul_netbsd; /* defined in kern_exec.c */ 181 182 /* 183 * System startup; initialize the world, create process 0, mount root 184 * filesystem, and fork to create init and pagedaemon. Most of the 185 * hard work is done in the lower-level initialization routines including 186 * startup(), which does memory initialization and autoconfiguration. 187 */ 188 void 189 main(void) 190 { 191 struct lwp *l; 192 struct proc *p; 193 struct pdevinit *pdev; 194 int s, error; 195 u_int i; 196 rlim_t lim; 197 extern struct pdevinit pdevinit[]; 198 extern void schedcpu(void *); 199 #if defined(NFSSERVER) || defined(NFS) 200 extern void nfs_init(void); 201 #endif 202 #ifdef NVNODE_IMPLICIT 203 int usevnodes; 204 #endif 205 206 /* 207 * Initialize the current LWP pointer (curlwp) before 208 * any possible traps/probes to simplify trap processing. 209 */ 210 simple_lock_init(&proc0.p_raslock); 211 l = &lwp0; 212 curlwp = l; 213 l->l_cpu = curcpu(); 214 l->l_proc = &proc0; 215 l->l_lid = 1; 216 /* 217 * Attempt to find console and initialize 218 * in case of early panic or other messages. 219 */ 220 consinit(); 221 printf("%s", copyright); 222 223 KERNEL_LOCK_INIT(); 224 225 uvm_init(); 226 227 /* Do machine-dependent initialization. */ 228 cpu_startup(); 229 230 /* Initialize callouts. */ 231 callout_startup(); 232 233 /* 234 * Initialize mbuf's. Do this now because we might attempt to 235 * allocate mbufs or mbuf clusters during autoconfiguration. 236 */ 237 mbinit(); 238 239 /* Initialize kqueues. */ 240 kqueue_init(); 241 242 /* Initialize sockets. */ 243 soinit(); 244 245 /* 246 * The following things must be done before autoconfiguration. 247 */ 248 evcnt_init(); /* initialize event counters */ 249 disk_init(); /* initialize disk list */ 250 tty_init(); /* initialize tty list */ 251 #if NRND > 0 252 rnd_init(); /* initialize RNG */ 253 #endif 254 #if NOPENCRYPTO > 0 255 /* Initialize crypto subsystem before configuring crypto hardware. */ 256 (void)crypto_init(); 257 #endif 258 /* Initialize the sysctl subsystem. */ 259 sysctl_init(); 260 261 /* 262 * Initialize process and pgrp structures. 263 */ 264 procinit(); 265 266 #ifdef LKM 267 /* Initialize the LKM system. */ 268 lkm_init(); 269 #endif 270 271 /* 272 * Create process 0 (the swapper). 273 */ 274 p = &proc0; 275 proc0_insert(p, l, &pgrp0, &session0); 276 277 /* 278 * Set P_NOCLDWAIT so that kernel threads are reparented to 279 * init(8) when they exit. init(8) can easily wait them out 280 * for us. 281 */ 282 p->p_flag = P_SYSTEM | P_NOCLDWAIT; 283 p->p_stat = SACTIVE; 284 p->p_nice = NZERO; 285 p->p_emul = &emul_netbsd; 286 #ifdef __HAVE_SYSCALL_INTERN 287 (*p->p_emul->e_syscall_intern)(p); 288 #endif 289 strncpy(p->p_comm, "swapper", MAXCOMLEN); 290 291 l->l_flag = L_INMEM; 292 l->l_stat = LSONPROC; 293 p->p_nrlwps = 1; 294 295 callout_init(&l->l_tsleep_ch); 296 297 /* Create credentials. */ 298 cred0.p_refcnt = 1; 299 p->p_cred = &cred0; 300 p->p_ucred = crget(); 301 p->p_ucred->cr_ngroups = 1; /* group 0 */ 302 303 /* Create the file descriptor table. */ 304 finit(); 305 p->p_fd = &filedesc0.fd_fd; 306 fdinit1(&filedesc0); 307 308 /* Create the CWD info. */ 309 p->p_cwdi = &cwdi0; 310 cwdi0.cwdi_cmask = cmask; 311 cwdi0.cwdi_refcnt = 1; 312 313 /* Create the limits structures. */ 314 p->p_limit = &limit0; 315 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 316 limit0.pl_rlimit[i].rlim_cur = 317 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 318 319 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 320 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = 321 maxfiles < nofile ? maxfiles : nofile; 322 323 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 324 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = 325 maxproc < maxuprc ? maxproc : maxuprc; 326 327 lim = ptoa(uvmexp.free); 328 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 329 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 330 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 331 limit0.pl_corename = defcorename; 332 limit0.p_refcnt = 1; 333 334 /* 335 * Initialize proc0's vmspace, which uses the kernel pmap. 336 * All kernel processes (which never have user space mappings) 337 * share proc0's vmspace, and thus, the kernel pmap. 338 */ 339 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 340 trunc_page(VM_MAX_ADDRESS)); 341 p->p_vmspace = &vmspace0; 342 343 l->l_addr = proc0paddr; /* XXX */ 344 345 p->p_stats = &pstat0; 346 347 /* 348 * Charge root for one process. 349 */ 350 (void)chgproccnt(0, 1); 351 352 rqinit(); 353 354 /* Configure virtual memory system, set vm rlimits. */ 355 uvm_init_limits(p); 356 357 /* Initialize the file systems. */ 358 #if defined(NFSSERVER) || defined(NFS) 359 nfs_init(); /* initialize server/shared data */ 360 #endif 361 #ifdef NVNODE_IMPLICIT 362 /* 363 * If maximum number of vnodes in namei vnode cache is not explicitly 364 * defined in kernel config, adjust the number such as we use roughly 365 * 0.5% of memory for vnode cache (but not less than NVNODE vnodes). 366 */ 367 usevnodes = (ptoa((unsigned)physmem) / 200) / sizeof(struct vnode); 368 if (usevnodes > desiredvnodes) 369 desiredvnodes = usevnodes; 370 #endif 371 vfsinit(); 372 373 /* Configure the system hardware. This will enable interrupts. */ 374 configure(); 375 376 ubc_init(); /* must be after autoconfig */ 377 378 /* Lock the kernel on behalf of proc0. */ 379 KERNEL_PROC_LOCK(l); 380 381 #ifdef SYSVSHM 382 /* Initialize System V style shared memory. */ 383 shminit(); 384 #endif 385 386 #ifdef SYSVSEM 387 /* Initialize System V style semaphores. */ 388 seminit(); 389 #endif 390 391 #ifdef SYSVMSG 392 /* Initialize System V style message queues. */ 393 msginit(); 394 #endif 395 396 397 #ifdef P1003_1B_SEMAPHORE 398 /* Initialize posix semaphores */ 399 ksem_init(); 400 #endif 401 /* Attach pseudo-devices. */ 402 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 403 (*pdev->pdev_attach)(pdev->pdev_count); 404 405 #ifdef FAST_IPSEC 406 /* Attach network crypto subsystem */ 407 ipsec_attach(); 408 #endif 409 410 /* 411 * Initialize protocols. Block reception of incoming packets 412 * until everything is ready. 413 */ 414 s = splnet(); 415 ifinit(); 416 domaininit(); 417 if_attachdomain(); 418 splx(s); 419 420 #ifdef GPROF 421 /* Initialize kernel profiling. */ 422 kmstartup(); 423 #endif 424 425 /* Initialize system accouting. */ 426 acct_init(); 427 428 #ifdef SYSTRACE 429 systrace_init(); 430 #endif 431 /* 432 * Initialize signal-related data structures, and signal state 433 * for proc0. 434 */ 435 signal_init(); 436 p->p_sigacts = &sigacts0; 437 siginit(p); 438 439 /* Kick off timeout driven events by calling first time. */ 440 schedcpu(NULL); 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 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 452 panic("fork init"); 453 454 /* 455 * Create any kernel threads who's creation was deferred because 456 * initproc 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 /* 470 * Finalize configuration now that all real devices have been 471 * found. This needs to be done before the root device is 472 * selected, since finalization may create the root device. 473 */ 474 config_finalize(); 475 476 /* 477 * Now that autoconfiguration has completed, we can determine 478 * the root and dump devices. 479 */ 480 cpu_rootconf(); 481 cpu_dumpconf(); 482 483 /* Mount the root file system. */ 484 do { 485 domountroothook(); 486 if ((error = vfs_mountroot())) { 487 printf("cannot mount root, error = %d\n", error); 488 boothowto |= RB_ASKNAME; 489 setroot(root_device, 490 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 491 } 492 } while (error != 0); 493 mountroothook_destroy(); 494 495 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 496 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 497 498 /* 499 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 500 * reference it. 501 */ 502 if (VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode)) 503 panic("cannot find root vnode"); 504 cwdi0.cwdi_cdir = rootvnode; 505 VREF(cwdi0.cwdi_cdir); 506 VOP_UNLOCK(rootvnode, 0); 507 cwdi0.cwdi_rdir = NULL; 508 509 /* 510 * Now that root is mounted, we can fixup initproc's CWD 511 * info. All other processes are kthreads, which merely 512 * share proc0's CWD info. 513 */ 514 initproc->p_cwdi->cwdi_cdir = rootvnode; 515 VREF(initproc->p_cwdi->cwdi_cdir); 516 initproc->p_cwdi->cwdi_rdir = NULL; 517 518 /* 519 * Now can look at time, having had a chance to verify the time 520 * from the file system. Reset p->p_rtime as it may have been 521 * munched in mi_switch() after the time got set. 522 */ 523 proclist_lock_read(); 524 s = splsched(); 525 for (p = LIST_FIRST(&allproc); p != NULL; 526 p = LIST_NEXT(p, p_list)) { 527 p->p_stats->p_start = mono_time = boottime = time; 528 for (l = LIST_FIRST(&p->p_lwps); l != NULL; 529 l = LIST_NEXT(l, l_sibling)) 530 if (l->l_cpu != NULL) 531 l->l_cpu->ci_schedstate.spc_runtime = time; 532 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 533 } 534 splx(s); 535 proclist_unlock_read(); 536 537 /* Create the pageout daemon kernel thread. */ 538 uvm_swap_init(); 539 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 540 panic("fork pagedaemon"); 541 542 /* Create the process reaper kernel thread. */ 543 if (kthread_create1(reaper, NULL, NULL, "reaper")) 544 panic("fork reaper"); 545 546 /* Create the filesystem syncer kernel thread. */ 547 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 548 panic("fork syncer"); 549 550 /* Create the aiodone daemon kernel thread. */ 551 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 552 "aiodoned")) 553 panic("fork aiodoned"); 554 555 #if defined(MULTIPROCESSOR) 556 /* Boot the secondary processors. */ 557 cpu_boot_secondary_processors(); 558 #endif 559 560 /* Initialize exec structures */ 561 exec_init(1); 562 563 #ifndef PIPE_SOCKETPAIR 564 /* Initialize pipe structures */ 565 pipe_init(); 566 #endif 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 /* The scheduler is an infinite loop. */ 575 uvm_scheduler(); 576 /* NOTREACHED */ 577 } 578 579 static void 580 check_console(struct proc *p) 581 { 582 struct nameidata nd; 583 int error; 584 585 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 586 error = namei(&nd); 587 if (error == 0) 588 vrele(nd.ni_vp); 589 else if (error == ENOENT) 590 printf("warning: no /dev/console\n"); 591 else 592 printf("warning: lookup /dev/console: error %d\n", error); 593 } 594 595 /* 596 * List of paths to try when searching for "init". 597 */ 598 static const char *initpaths[] = { 599 "/sbin/init", 600 "/sbin/oinit", 601 "/sbin/init.bak", 602 NULL, 603 }; 604 605 /* 606 * Start the initial user process; try exec'ing each pathname in "initpaths". 607 * The program is invoked with one argument containing the boot flags. 608 */ 609 static void 610 start_init(void *arg) 611 { 612 struct lwp *l = arg; 613 struct proc *p = l->l_proc; 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, i, error; 621 register_t retval[2]; 622 char flags[4], *flagsp; 623 const char *path, *slash; 624 char *ucp, **uap, *arg0, *arg1 = NULL; 625 char ipath[129]; 626 int ipx, len; 627 628 /* 629 * Now in process 1. 630 */ 631 strncpy(p->p_comm, "init", MAXCOMLEN); 632 633 /* 634 * Wait for main() to tell us that it's safe to exec. 635 */ 636 while (start_init_exec == 0) 637 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 638 639 /* 640 * This is not the right way to do this. We really should 641 * hand-craft a descriptor onto /dev/console to hand to init, 642 * but that's a _lot_ more work, and the benefit from this easy 643 * hack makes up for the "good is the enemy of the best" effect. 644 */ 645 check_console(p); 646 647 /* 648 * Need just enough stack to hold the faked-up "execve()" arguments. 649 */ 650 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 651 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 652 NULL, UVM_UNKNOWN_OFFSET, 0, 653 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 654 UVM_ADV_NORMAL, 655 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 656 panic("init: couldn't allocate argument space"); 657 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 658 659 ipx = 0; 660 while (1) { 661 if (boothowto & RB_ASKNAME) { 662 printf("init path"); 663 if (initpaths[ipx]) 664 printf(" (default %s)", initpaths[ipx]); 665 printf(": "); 666 len = cngetsn(ipath, sizeof(ipath)-1); 667 if (len == 0) { 668 if (initpaths[ipx]) 669 path = initpaths[ipx++]; 670 else 671 continue; 672 } else { 673 ipath[len] = '\0'; 674 path = ipath; 675 } 676 } else { 677 if ((path = initpaths[ipx++]) == NULL) 678 break; 679 } 680 681 ucp = (char *)USRSTACK; 682 683 /* 684 * Construct the boot flag argument. 685 */ 686 flagsp = flags; 687 *flagsp++ = '-'; 688 options = 0; 689 690 if (boothowto & RB_SINGLE) { 691 *flagsp++ = 's'; 692 options = 1; 693 } 694 #ifdef notyet 695 if (boothowto & RB_FASTBOOT) { 696 *flagsp++ = 'f'; 697 options = 1; 698 } 699 #endif 700 701 /* 702 * Move out the flags (arg 1), if necessary. 703 */ 704 if (options != 0) { 705 *flagsp++ = '\0'; 706 i = flagsp - flags; 707 #ifdef DEBUG 708 printf("init: copying out flags `%s' %d\n", flags, i); 709 #endif 710 arg1 = STACK_ALLOC(ucp, i); 711 ucp = STACK_MAX(arg1, i); 712 (void)copyout((caddr_t)flags, arg1, i); 713 } 714 715 /* 716 * Move out the file name (also arg 0). 717 */ 718 i = strlen(path) + 1; 719 #ifdef DEBUG 720 printf("init: copying out path `%s' %d\n", path, i); 721 #else 722 if (boothowto & RB_ASKNAME || path != initpaths[0]) 723 printf("init: trying %s\n", path); 724 #endif 725 arg0 = STACK_ALLOC(ucp, i); 726 ucp = STACK_MAX(arg0, i); 727 (void)copyout((caddr_t)path, arg0, i); 728 729 /* 730 * Move out the arg pointers. 731 */ 732 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 733 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 734 SCARG(&args, path) = arg0; 735 SCARG(&args, argp) = uap; 736 SCARG(&args, envp) = NULL; 737 slash = strrchr(path, '/'); 738 if (slash) 739 (void)suword((caddr_t)uap++, 740 (long)arg0 + (slash + 1 - path)); 741 else 742 (void)suword((caddr_t)uap++, (long)arg0); 743 if (options != 0) 744 (void)suword((caddr_t)uap++, (long)arg1); 745 (void)suword((caddr_t)uap++, 0); /* terminator */ 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 error = sys_execve(LIST_FIRST(&p->p_lwps), &args, retval); 752 if (error == 0 || error == EJUSTRETURN) { 753 KERNEL_PROC_UNLOCK(l); 754 return; 755 } 756 printf("exec %s: error %d\n", path, error); 757 } 758 printf("init: not found\n"); 759 panic("no init"); 760 } 761