1 /* $NetBSD: init_main.c,v 1.244 2005/01/23 19:02:02 chs Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 37 */ 38 39 /* 40 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: init_main.c,v 1.244 2005/01/23 19:02:02 chs Exp $"); 75 76 #include "fs_nfs.h" 77 #include "opt_nfsserver.h" 78 #include "opt_ipsec.h" 79 #include "opt_sysv.h" 80 #include "opt_maxuprc.h" 81 #include "opt_multiprocessor.h" 82 #include "opt_pipe.h" 83 #include "opt_syscall_debug.h" 84 #include "opt_systrace.h" 85 #include "opt_posix.h" 86 #include "opt_kcont.h" 87 88 #include "opencrypto.h" 89 #include "rnd.h" 90 91 #include <sys/param.h> 92 #include <sys/acct.h> 93 #include <sys/filedesc.h> 94 #include <sys/file.h> 95 #include <sys/errno.h> 96 #include <sys/callout.h> 97 #include <sys/kernel.h> 98 #include <sys/kcont.h> 99 #include <sys/mount.h> 100 #include <sys/proc.h> 101 #include <sys/kthread.h> 102 #include <sys/resourcevar.h> 103 #include <sys/signalvar.h> 104 #include <sys/systm.h> 105 #include <sys/vnode.h> 106 #include <sys/tty.h> 107 #include <sys/conf.h> 108 #include <sys/disklabel.h> 109 #include <sys/buf.h> 110 #include <sys/device.h> 111 #include <sys/exec.h> 112 #include <sys/socketvar.h> 113 #include <sys/protosw.h> 114 #include <sys/reboot.h> 115 #include <sys/user.h> 116 #include <sys/sysctl.h> 117 #include <sys/event.h> 118 #include <sys/mbuf.h> 119 #ifdef FAST_IPSEC 120 #include <netipsec/ipsec.h> 121 #endif 122 #ifdef SYSVSHM 123 #include <sys/shm.h> 124 #endif 125 #ifdef SYSVSEM 126 #include <sys/sem.h> 127 #endif 128 #ifdef SYSVMSG 129 #include <sys/msg.h> 130 #endif 131 #ifdef P1003_1B_SEMAPHORE 132 #include <sys/ksem.h> 133 #endif 134 #ifdef SYSTRACE 135 #include <sys/systrace.h> 136 #endif 137 #include <sys/domain.h> 138 #include <sys/namei.h> 139 #if NOPENCRYPTO > 0 140 #include <opencrypto/cryptodev.h> /* XXX really the framework */ 141 #endif 142 #if NRND > 0 143 #include <sys/rnd.h> 144 #endif 145 #ifndef PIPE_SOCKETPAIR 146 #include <sys/pipe.h> 147 #endif 148 #ifdef LKM 149 #include <sys/lkm.h> 150 #endif 151 152 #include <sys/syscall.h> 153 #include <sys/sa.h> 154 #include <sys/syscallargs.h> 155 156 #include <ufs/ufs/quota.h> 157 158 #include <miscfs/genfs/genfs.h> 159 #include <miscfs/syncfs/syncfs.h> 160 161 #include <machine/cpu.h> 162 163 #include <uvm/uvm.h> 164 165 #include <dev/cons.h> 166 167 #include <net/if.h> 168 #include <net/raw_cb.h> 169 170 /* Components of the first process -- never freed. */ 171 struct session session0; 172 struct pgrp pgrp0; 173 struct proc proc0; 174 struct lwp lwp0; 175 struct pcred cred0; 176 struct filedesc0 filedesc0; 177 struct cwdinfo cwdi0; 178 struct plimit limit0; 179 struct pstats pstat0; 180 struct vmspace vmspace0; 181 struct sigacts sigacts0; 182 #ifndef curlwp 183 struct lwp *curlwp = &lwp0; 184 #endif 185 struct proc *initproc; 186 187 int nofile = NOFILE; 188 int maxuprc = MAXUPRC; 189 int cmask = CMASK; 190 extern struct user *proc0paddr; 191 192 struct vnode *rootvp, *swapdev_vp; 193 int boothowto; 194 int cold = 1; /* still working on startup */ 195 struct timeval boottime; 196 time_t rootfstime; /* recorded root fs time, if known */ 197 198 __volatile int start_init_exec; /* semaphore for start_init() */ 199 200 static void check_console(struct proc *p); 201 static void start_init(void *); 202 void main(void); 203 204 extern const struct emul emul_netbsd; /* defined in kern_exec.c */ 205 206 /* 207 * System startup; initialize the world, create process 0, mount root 208 * filesystem, and fork to create init and pagedaemon. Most of the 209 * hard work is done in the lower-level initialization routines including 210 * startup(), which does memory initialization and autoconfiguration. 211 */ 212 void 213 main(void) 214 { 215 struct lwp *l; 216 struct proc *p; 217 struct pdevinit *pdev; 218 int s, error; 219 u_int i; 220 rlim_t lim; 221 extern struct pdevinit pdevinit[]; 222 extern void schedcpu(void *); 223 #if defined(NFSSERVER) || defined(NFS) 224 extern void nfs_init(void); 225 #endif 226 #ifdef NVNODE_IMPLICIT 227 int usevnodes; 228 #endif 229 230 /* 231 * Initialize the current LWP pointer (curlwp) before 232 * any possible traps/probes to simplify trap processing. 233 */ 234 l = &lwp0; 235 curlwp = l; 236 l->l_cpu = curcpu(); 237 l->l_proc = &proc0; 238 l->l_lid = 1; 239 240 /* 241 * Attempt to find console and initialize 242 * in case of early panic or other messages. 243 */ 244 consinit(); 245 printf("%s", copyright); 246 247 KERNEL_LOCK_INIT(); 248 249 uvm_init(); 250 251 /* Do machine-dependent initialization. */ 252 cpu_startup(); 253 254 /* Initialize callouts. */ 255 callout_startup(); 256 257 /* Initialize the buffer cache */ 258 bufinit(); 259 260 /* 261 * Initialize mbuf's. Do this now because we might attempt to 262 * allocate mbufs or mbuf clusters during autoconfiguration. 263 */ 264 mbinit(); 265 266 /* Initialize sockets. */ 267 soinit(); 268 269 #ifdef KCONT 270 /* Initialize kcont. */ 271 kcont_init(); 272 #endif 273 274 /* 275 * The following things must be done before autoconfiguration. 276 */ 277 evcnt_init(); /* initialize event counters */ 278 tty_init(); /* initialize tty list */ 279 #if NRND > 0 280 rnd_init(); /* initialize RNG */ 281 #endif 282 #if NOPENCRYPTO > 0 283 /* Initialize crypto subsystem before configuring crypto hardware. */ 284 (void)crypto_init(); 285 #endif 286 /* Initialize the sysctl subsystem. */ 287 sysctl_init(); 288 289 /* Initialize process and pgrp structures. */ 290 procinit(); 291 292 #ifdef LKM 293 /* Initialize the LKM system. */ 294 lkm_init(); 295 #endif 296 297 /* 298 * Create process 0 (the swapper). 299 */ 300 p = &proc0; 301 proc0_insert(p, l, &pgrp0, &session0); 302 303 /* 304 * Set P_NOCLDWAIT so that kernel threads are reparented to 305 * init(8) when they exit. init(8) can easily wait them out 306 * for us. 307 */ 308 p->p_flag = P_SYSTEM | P_NOCLDWAIT; 309 p->p_stat = SACTIVE; 310 p->p_nice = NZERO; 311 p->p_emul = &emul_netbsd; 312 #ifdef __HAVE_SYSCALL_INTERN 313 (*p->p_emul->e_syscall_intern)(p); 314 #endif 315 strncpy(p->p_comm, "swapper", MAXCOMLEN); 316 317 l->l_flag = L_INMEM; 318 l->l_stat = LSONPROC; 319 p->p_nrlwps = 1; 320 321 callout_init(&l->l_tsleep_ch); 322 323 /* Create credentials. */ 324 cred0.p_refcnt = 1; 325 p->p_cred = &cred0; 326 p->p_ucred = crget(); 327 p->p_ucred->cr_ngroups = 1; /* group 0 */ 328 329 /* Create the file descriptor table. */ 330 p->p_fd = &filedesc0.fd_fd; 331 fdinit1(&filedesc0); 332 333 /* Create the CWD info. */ 334 p->p_cwdi = &cwdi0; 335 cwdi0.cwdi_cmask = cmask; 336 cwdi0.cwdi_refcnt = 1; 337 simple_lock_init(&cwdi0.cwdi_slock); 338 339 /* Create the limits structures. */ 340 p->p_limit = &limit0; 341 simple_lock_init(&limit0.p_slock); 342 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 343 limit0.pl_rlimit[i].rlim_cur = 344 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 345 346 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 347 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = 348 maxfiles < nofile ? maxfiles : nofile; 349 350 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 351 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = 352 maxproc < maxuprc ? maxproc : maxuprc; 353 354 lim = ptoa(uvmexp.free); 355 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 356 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 357 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 358 limit0.pl_corename = defcorename; 359 limit0.p_refcnt = 1; 360 361 /* 362 * Initialize proc0's vmspace, which uses the kernel pmap. 363 * All kernel processes (which never have user space mappings) 364 * share proc0's vmspace, and thus, the kernel pmap. 365 */ 366 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 367 trunc_page(VM_MAX_ADDRESS)); 368 p->p_vmspace = &vmspace0; 369 370 l->l_addr = proc0paddr; /* XXX */ 371 372 p->p_stats = &pstat0; 373 374 /* 375 * Charge root for one process. 376 */ 377 (void)chgproccnt(0, 1); 378 379 rqinit(); 380 381 /* Configure virtual memory system, set vm rlimits. */ 382 uvm_init_limits(p); 383 384 /* Initialize the file systems. */ 385 #if defined(NFSSERVER) || defined(NFS) 386 nfs_init(); /* initialize server/shared data */ 387 #endif 388 #ifdef NVNODE_IMPLICIT 389 /* 390 * If maximum number of vnodes in namei vnode cache is not explicitly 391 * defined in kernel config, adjust the number such as we use roughly 392 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 393 */ 394 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 395 if (usevnodes > desiredvnodes) 396 desiredvnodes = usevnodes; 397 #endif 398 vfsinit(); 399 400 /* Configure the system hardware. This will enable interrupts. */ 401 configure(); 402 403 ubc_init(); /* must be after autoconfig */ 404 405 /* Lock the kernel on behalf of proc0. */ 406 KERNEL_PROC_LOCK(l); 407 408 #ifdef SYSVSHM 409 /* Initialize System V style shared memory. */ 410 shminit(); 411 #endif 412 413 #ifdef SYSVSEM 414 /* Initialize System V style semaphores. */ 415 seminit(); 416 #endif 417 418 #ifdef SYSVMSG 419 /* Initialize System V style message queues. */ 420 msginit(); 421 #endif 422 423 #ifdef P1003_1B_SEMAPHORE 424 /* Initialize posix semaphores */ 425 ksem_init(); 426 #endif 427 /* Attach pseudo-devices. */ 428 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 429 (*pdev->pdev_attach)(pdev->pdev_count); 430 431 #ifdef FAST_IPSEC 432 /* Attach network crypto subsystem */ 433 ipsec_attach(); 434 #endif 435 436 /* 437 * Initialize protocols. Block reception of incoming packets 438 * until everything is ready. 439 */ 440 s = splnet(); 441 ifinit(); 442 domaininit(); 443 if_attachdomain(); 444 splx(s); 445 446 #ifdef GPROF 447 /* Initialize kernel profiling. */ 448 kmstartup(); 449 #endif 450 451 /* Initialize system accouting. */ 452 acct_init(); 453 454 #ifdef SYSTRACE 455 systrace_init(); 456 #endif 457 /* 458 * Initialize signal-related data structures, and signal state 459 * for proc0. 460 */ 461 signal_init(); 462 p->p_sigacts = &sigacts0; 463 siginit(p); 464 465 /* Kick off timeout driven events by calling first time. */ 466 schedcpu(NULL); 467 468 /* 469 * Create process 1 (init(8)). We do this now, as Unix has 470 * historically had init be process 1, and changing this would 471 * probably upset a lot of people. 472 * 473 * Note that process 1 won't immediately exec init(8), but will 474 * wait for us to inform it that the root file system has been 475 * mounted. 476 */ 477 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 478 panic("fork init"); 479 480 /* 481 * Create any kernel threads who's creation was deferred because 482 * initproc had not yet been created. 483 */ 484 kthread_run_deferred_queue(); 485 486 /* 487 * Now that device driver threads have been created, wait for 488 * them to finish any deferred autoconfiguration. Note we don't 489 * need to lock this semaphore, since we haven't booted any 490 * secondary processors, yet. 491 */ 492 while (config_pending) 493 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 494 495 /* 496 * Finalize configuration now that all real devices have been 497 * found. This needs to be done before the root device is 498 * selected, since finalization may create the root device. 499 */ 500 config_finalize(); 501 502 /* 503 * Now that autoconfiguration has completed, we can determine 504 * the root and dump devices. 505 */ 506 cpu_rootconf(); 507 cpu_dumpconf(); 508 509 /* Mount the root file system. */ 510 do { 511 domountroothook(); 512 if ((error = vfs_mountroot())) { 513 printf("cannot mount root, error = %d\n", error); 514 boothowto |= RB_ASKNAME; 515 setroot(root_device, 516 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 517 } 518 } while (error != 0); 519 mountroothook_destroy(); 520 521 /* 522 * Initialise the time-of-day clock, passing the time recorded 523 * in the root filesystem (if any) for use by systems that 524 * don't have a non-volatile time-of-day device. 525 */ 526 inittodr(rootfstime); 527 528 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 529 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 530 531 /* 532 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 533 * reference it. 534 */ 535 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 536 if (error) 537 panic("cannot find root vnode, error=%d", error); 538 cwdi0.cwdi_cdir = rootvnode; 539 VREF(cwdi0.cwdi_cdir); 540 VOP_UNLOCK(rootvnode, 0); 541 cwdi0.cwdi_rdir = NULL; 542 543 /* 544 * Now that root is mounted, we can fixup initproc's CWD 545 * info. All other processes are kthreads, which merely 546 * share proc0's CWD info. 547 */ 548 initproc->p_cwdi->cwdi_cdir = rootvnode; 549 VREF(initproc->p_cwdi->cwdi_cdir); 550 initproc->p_cwdi->cwdi_rdir = NULL; 551 552 /* 553 * Now can look at time, having had a chance to verify the time 554 * from the file system. Reset p->p_rtime as it may have been 555 * munched in mi_switch() after the time got set. 556 */ 557 proclist_lock_read(); 558 s = splsched(); 559 LIST_FOREACH(p, &allproc, p_list) { 560 KASSERT((p->p_flag & P_MARKER) == 0); 561 p->p_stats->p_start = mono_time = boottime = time; 562 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 563 if (l->l_cpu != NULL) 564 l->l_cpu->ci_schedstate.spc_runtime = time; 565 } 566 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 567 } 568 splx(s); 569 proclist_unlock_read(); 570 571 /* Create the pageout daemon kernel thread. */ 572 uvm_swap_init(); 573 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 574 panic("fork pagedaemon"); 575 576 /* Create the filesystem syncer kernel thread. */ 577 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 578 panic("fork syncer"); 579 580 /* Create the aiodone daemon kernel thread. */ 581 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 582 "aiodoned")) 583 panic("fork aiodoned"); 584 585 #if defined(MULTIPROCESSOR) 586 /* Boot the secondary processors. */ 587 cpu_boot_secondary_processors(); 588 #endif 589 590 /* Initialize exec structures */ 591 exec_init(1); 592 593 /* 594 * Okay, now we can let init(8) exec! It's off to userland! 595 */ 596 start_init_exec = 1; 597 wakeup((void *)&start_init_exec); 598 599 /* The scheduler is an infinite loop. */ 600 uvm_scheduler(); 601 /* NOTREACHED */ 602 } 603 604 void 605 setrootfstime(time_t t) 606 { 607 rootfstime = t; 608 } 609 610 static void 611 check_console(struct proc *p) 612 { 613 struct nameidata nd; 614 int error; 615 616 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 617 error = namei(&nd); 618 if (error == 0) 619 vrele(nd.ni_vp); 620 else if (error == ENOENT) 621 printf("warning: no /dev/console\n"); 622 else 623 printf("warning: lookup /dev/console: error %d\n", error); 624 } 625 626 /* 627 * List of paths to try when searching for "init". 628 */ 629 static const char *initpaths[] = { 630 "/sbin/init", 631 "/sbin/oinit", 632 "/sbin/init.bak", 633 NULL, 634 }; 635 636 /* 637 * Start the initial user process; try exec'ing each pathname in "initpaths". 638 * The program is invoked with one argument containing the boot flags. 639 */ 640 static void 641 start_init(void *arg) 642 { 643 struct lwp *l = arg; 644 struct proc *p = l->l_proc; 645 vaddr_t addr; 646 struct sys_execve_args /* { 647 syscallarg(const char *) path; 648 syscallarg(char * const *) argp; 649 syscallarg(char * const *) envp; 650 } */ args; 651 int options, i, error; 652 register_t retval[2]; 653 char flags[4], *flagsp; 654 const char *path, *slash; 655 char *ucp, **uap, *arg0, *arg1 = NULL; 656 char ipath[129]; 657 int ipx, len; 658 659 /* 660 * Now in process 1. 661 */ 662 strncpy(p->p_comm, "init", MAXCOMLEN); 663 664 /* 665 * Wait for main() to tell us that it's safe to exec. 666 */ 667 while (start_init_exec == 0) 668 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 669 670 /* 671 * This is not the right way to do this. We really should 672 * hand-craft a descriptor onto /dev/console to hand to init, 673 * but that's a _lot_ more work, and the benefit from this easy 674 * hack makes up for the "good is the enemy of the best" effect. 675 */ 676 check_console(p); 677 678 /* 679 * Need just enough stack to hold the faked-up "execve()" arguments. 680 */ 681 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 682 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 683 NULL, UVM_UNKNOWN_OFFSET, 0, 684 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 685 UVM_ADV_NORMAL, 686 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 687 panic("init: couldn't allocate argument space"); 688 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 689 690 ipx = 0; 691 while (1) { 692 if (boothowto & RB_ASKNAME) { 693 printf("init path"); 694 if (initpaths[ipx]) 695 printf(" (default %s)", initpaths[ipx]); 696 printf(": "); 697 len = cngetsn(ipath, sizeof(ipath)-1); 698 if (len == 0) { 699 if (initpaths[ipx]) 700 path = initpaths[ipx++]; 701 else 702 continue; 703 } else { 704 ipath[len] = '\0'; 705 path = ipath; 706 } 707 } else { 708 if ((path = initpaths[ipx++]) == NULL) 709 break; 710 } 711 712 ucp = (char *)USRSTACK; 713 714 /* 715 * Construct the boot flag argument. 716 */ 717 flagsp = flags; 718 *flagsp++ = '-'; 719 options = 0; 720 721 if (boothowto & RB_SINGLE) { 722 *flagsp++ = 's'; 723 options = 1; 724 } 725 #ifdef notyet 726 if (boothowto & RB_FASTBOOT) { 727 *flagsp++ = 'f'; 728 options = 1; 729 } 730 #endif 731 732 /* 733 * Move out the flags (arg 1), if necessary. 734 */ 735 if (options != 0) { 736 *flagsp++ = '\0'; 737 i = flagsp - flags; 738 #ifdef DEBUG 739 printf("init: copying out flags `%s' %d\n", flags, i); 740 #endif 741 arg1 = STACK_ALLOC(ucp, i); 742 ucp = STACK_MAX(arg1, i); 743 (void)copyout((caddr_t)flags, arg1, i); 744 } 745 746 /* 747 * Move out the file name (also arg 0). 748 */ 749 i = strlen(path) + 1; 750 #ifdef DEBUG 751 printf("init: copying out path `%s' %d\n", path, i); 752 #else 753 if (boothowto & RB_ASKNAME || path != initpaths[0]) 754 printf("init: trying %s\n", path); 755 #endif 756 arg0 = STACK_ALLOC(ucp, i); 757 ucp = STACK_MAX(arg0, i); 758 (void)copyout((caddr_t)path, arg0, i); 759 760 /* 761 * Move out the arg pointers. 762 */ 763 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 764 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 765 SCARG(&args, path) = arg0; 766 SCARG(&args, argp) = uap; 767 SCARG(&args, envp) = NULL; 768 slash = strrchr(path, '/'); 769 if (slash) 770 (void)suword((caddr_t)uap++, 771 (long)arg0 + (slash + 1 - path)); 772 else 773 (void)suword((caddr_t)uap++, (long)arg0); 774 if (options != 0) 775 (void)suword((caddr_t)uap++, (long)arg1); 776 (void)suword((caddr_t)uap++, 0); /* terminator */ 777 778 /* 779 * Now try to exec the program. If can't for any reason 780 * other than it doesn't exist, complain. 781 */ 782 error = sys_execve(LIST_FIRST(&p->p_lwps), &args, retval); 783 if (error == 0 || error == EJUSTRETURN) { 784 KERNEL_PROC_UNLOCK(l); 785 return; 786 } 787 printf("exec %s: error %d\n", path, error); 788 } 789 printf("init: not found\n"); 790 panic("no init"); 791 } 792