kern_shutdown.c revision 53452
117658Sjulian/*- 217658Sjulian * Copyright (c) 1986, 1988, 1991, 1993 317658Sjulian * The Regents of the University of California. All rights reserved. 417658Sjulian * (c) UNIX System Laboratories, Inc. 517658Sjulian * All or some portions of this file are derived from material licensed 617658Sjulian * to the University of California by American Telephone and Telegraph 717658Sjulian * Co. or Unix System Laboratories, Inc. and are reproduced herein with 817658Sjulian * the permission of UNIX System Laboratories, Inc. 917658Sjulian * 1017658Sjulian * Redistribution and use in source and binary forms, with or without 1117658Sjulian * modification, are permitted provided that the following conditions 1217658Sjulian * are met: 1317658Sjulian * 1. Redistributions of source code must retain the above copyright 1417658Sjulian * notice, this list of conditions and the following disclaimer. 1517658Sjulian * 2. Redistributions in binary form must reproduce the above copyright 1617658Sjulian * notice, this list of conditions and the following disclaimer in the 1717658Sjulian * documentation and/or other materials provided with the distribution. 1817658Sjulian * 3. All advertising materials mentioning features or use of this software 1917658Sjulian * must display the following acknowledgement: 2017658Sjulian * This product includes software developed by the University of 2117658Sjulian * California, Berkeley and its contributors. 2217658Sjulian * 4. Neither the name of the University nor the names of its contributors 2317658Sjulian * may be used to endorse or promote products derived from this software 2417658Sjulian * without specific prior written permission. 2517658Sjulian * 2617658Sjulian * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2717658Sjulian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2817658Sjulian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2917658Sjulian * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3017658Sjulian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3117658Sjulian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3217658Sjulian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3317658Sjulian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3417658Sjulian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3517658Sjulian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3617658Sjulian * SUCH DAMAGE. 3717658Sjulian * 3817658Sjulian * @(#)kern_shutdown.c 8.3 (Berkeley) 1/21/94 3950477Speter * $FreeBSD: head/sys/kern/kern_shutdown.c 53452 1999-11-20 10:00:46Z phk $ 4017658Sjulian */ 4117658Sjulian 4217658Sjulian#include "opt_ddb.h" 4333445Seivind#include "opt_hw_wdog.h" 4428976Sbde#include "opt_panic.h" 4528976Sbde#include "opt_show_busybufs.h" 4617658Sjulian 4717658Sjulian#include <sys/param.h> 4817658Sjulian#include <sys/systm.h> 4950107Smsmith#include <sys/eventhandler.h> 5031275Sbde#include <sys/buf.h> 5117658Sjulian#include <sys/reboot.h> 5217658Sjulian#include <sys/proc.h> 5341137Smsmith#include <sys/vnode.h> 5417658Sjulian#include <sys/kernel.h> 5521776Sbde#include <sys/mount.h> 5639237Sgibbs#include <sys/queue.h> 5717658Sjulian#include <sys/sysctl.h> 5817658Sjulian#include <sys/conf.h> 5917658Sjulian#include <sys/sysproto.h> 6049558Sphk#include <sys/cons.h> 6117658Sjulian 6217658Sjulian#include <machine/pcb.h> 6317658Sjulian#include <machine/clock.h> 6417658Sjulian#include <machine/md_var.h> 6526812Speter#ifdef SMP 6626812Speter#include <machine/smp.h> /* smp_active, cpuid */ 6726812Speter#endif 6817658Sjulian 6917658Sjulian#include <sys/signalvar.h> 7017658Sjulian 7117658Sjulian#ifndef PANIC_REBOOT_WAIT_TIME 7217658Sjulian#define PANIC_REBOOT_WAIT_TIME 15 /* default to 15 seconds */ 7317658Sjulian#endif 7417658Sjulian 7517658Sjulian/* 7617658Sjulian * Note that stdarg.h and the ANSI style va_start macro is used for both 7717658Sjulian * ANSI and traditional C compilers. 7817658Sjulian */ 7917658Sjulian#include <machine/stdarg.h> 8017658Sjulian 8128769Sbde#ifdef DDB 8217658Sjulian#ifdef DDB_UNATTENDED 8342135Smsmithint debugger_on_panic = 0; 8417658Sjulian#else 8542135Smsmithint debugger_on_panic = 1; 8617658Sjulian#endif 8717658SjulianSYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW, 8846381Sbillf &debugger_on_panic, 0, "Run debugger on kernel panic"); 8917658Sjulian#endif 9017658Sjulian 9143436SmsmithSYSCTL_NODE(_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0, "Shutdown environment"); 9243436Smsmith 9328000Sjulian#ifdef HW_WDOG 9417658Sjulian/* 9527997Sjulian * If there is a hardware watchdog, point this at the function needed to 9627997Sjulian * hold it off. 9727997Sjulian * It's needed when the kernel needs to do some lengthy operations. 9827997Sjulian * e.g. in wd.c when dumping core.. It's most annoying to have 9927997Sjulian * your precious core-dump only half written because the wdog kicked in. 10027997Sjulian */ 10127997Sjulianwatchdog_tickle_fn wdog_tickler = NULL; 10228000Sjulian#endif /* HW_WDOG */ 10327997Sjulian 10427997Sjulian/* 10517658Sjulian * Variable panicstr contains argument to first call to panic; used as flag 10617658Sjulian * to indicate that the kernel has already called panic. 10717658Sjulian */ 10817658Sjulianconst char *panicstr; 10917658Sjulian 11031275Sbdestatic void boot __P((int)) __dead2; 11131275Sbdestatic void dumpsys __P((void)); 11248868Sphkstatic int setdumpdev __P((dev_t dev)); 11350107Smsmithstatic void poweroff_wait __P((void *, int)); 11450107Smsmithstatic void shutdown_halt __P((void *junk, int howto)); 11550107Smsmithstatic void shutdown_panic __P((void *junk, int howto)); 11650107Smsmithstatic void shutdown_reset __P((void *junk, int howto)); 11717658Sjulian 11850107Smsmith/* register various local shutdown events */ 11950107Smsmithstatic void 12050107Smsmithshutdown_conf(void *unused) 12150107Smsmith{ 12250107Smsmith EVENTHANDLER_REGISTER(shutdown_final, poweroff_wait, NULL, SHUTDOWN_PRI_FIRST); 12350107Smsmith EVENTHANDLER_REGISTER(shutdown_final, shutdown_halt, NULL, SHUTDOWN_PRI_LAST + 100); 12450107Smsmith EVENTHANDLER_REGISTER(shutdown_final, shutdown_panic, NULL, SHUTDOWN_PRI_LAST + 100); 12550107Smsmith EVENTHANDLER_REGISTER(shutdown_final, shutdown_reset, NULL, SHUTDOWN_PRI_LAST + 200); 12650107Smsmith} 12748868Sphk 12850107SmsmithSYSINIT(shutdown_conf, SI_SUB_INTRINSIC, SI_ORDER_ANY, shutdown_conf, NULL) 12950107Smsmith 13017658Sjulian/* ARGSUSED */ 13117658Sjulian 13217658Sjulian/* 13317658Sjulian * The system call that results in a reboot 13417658Sjulian */ 13517658Sjulianint 13630994Sphkreboot(p, uap) 13717658Sjulian struct proc *p; 13817658Sjulian struct reboot_args *uap; 13917658Sjulian{ 14017658Sjulian int error; 14117658Sjulian 14246112Sphk if ((error = suser(p))) 14317658Sjulian return (error); 14417658Sjulian 14517658Sjulian boot(uap->opt); 14617658Sjulian return (0); 14717658Sjulian} 14817658Sjulian 14917658Sjulian/* 15017658Sjulian * Called by events that want to shut down.. e.g <CTL><ALT><DEL> on a PC 15117658Sjulian */ 15217658Sjulianvoid 15328769Sbdeshutdown_nice() 15417658Sjulian{ 15517658Sjulian /* Send a signal to init(8) and have it shutdown the world */ 15617658Sjulian if (initproc != NULL) { 15717658Sjulian psignal(initproc, SIGINT); 15817658Sjulian } else { 15917658Sjulian /* No init(8) running, so simply reboot */ 16017658Sjulian boot(RB_NOSYNC); 16117658Sjulian } 16217658Sjulian return; 16317658Sjulian} 16417658Sjulianstatic int waittime = -1; 16517658Sjulianstatic struct pcb dumppcb; 16617658Sjulian 16717658Sjulian/* 16817658Sjulian * Go through the rigmarole of shutting down.. 16917658Sjulian * this used to be in machdep.c but I'll be dammned if I could see 17017658Sjulian * anything machine dependant in it. 17117658Sjulian */ 17231275Sbdestatic void 17317658Sjulianboot(howto) 17417658Sjulian int howto; 17517658Sjulian{ 17617658Sjulian 17725164Speter#ifdef SMP 17825164Speter if (smp_active) { 17926812Speter printf("boot() called on cpu#%d\n", cpuid); 18025164Speter } 18125164Speter#endif 18227997Sjulian /* 18327997Sjulian * Do any callouts that should be done BEFORE syncing the filesystems. 18427997Sjulian */ 18550107Smsmith EVENTHANDLER_INVOKE(shutdown_pre_sync, howto); 18627997Sjulian 18727997Sjulian /* 18827997Sjulian * Now sync filesystems 18927997Sjulian */ 19017658Sjulian if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) { 19117658Sjulian register struct buf *bp; 19217658Sjulian int iter, nbusy; 19317658Sjulian 19417658Sjulian waittime = 0; 19517658Sjulian printf("\nsyncing disks... "); 19617658Sjulian 19730994Sphk sync(&proc0, NULL); 19817658Sjulian 19934266Sjulian /* 20034266Sjulian * With soft updates, some buffers that are 20134266Sjulian * written will be remarked as dirty until other 20234266Sjulian * buffers are written. 20334266Sjulian */ 20417658Sjulian for (iter = 0; iter < 20; iter++) { 20517658Sjulian nbusy = 0; 20617658Sjulian for (bp = &buf[nbuf]; --bp >= buf; ) { 20748225Smckusick if ((bp->b_flags & B_INVAL) == 0 && 20848225Smckusick BUF_REFCNT(bp) > 0) { 20917658Sjulian nbusy++; 21034266Sjulian } else if ((bp->b_flags & (B_DELWRI | B_INVAL)) 21134266Sjulian == B_DELWRI) { 21234266Sjulian /* bawrite(bp);*/ 21334266Sjulian nbusy++; 21417658Sjulian } 21517658Sjulian } 21617658Sjulian if (nbusy == 0) 21717658Sjulian break; 21817658Sjulian printf("%d ", nbusy); 21934266Sjulian sync(&proc0, NULL); 22034266Sjulian DELAY(50000 * iter); 22117658Sjulian } 22253023Sphk printf("\n"); 22341137Smsmith /* 22441137Smsmith * Count only busy local buffers to prevent forcing 22541137Smsmith * a fsck if we're just a client of a wedged NFS server 22641137Smsmith */ 22741137Smsmith nbusy = 0; 22841137Smsmith for (bp = &buf[nbuf]; --bp >= buf; ) { 22948225Smckusick if (((bp->b_flags&B_INVAL) == 0 && BUF_REFCNT(bp)) || 23048225Smckusick ((bp->b_flags & (B_DELWRI|B_INVAL)) == B_DELWRI)) { 23153023Sphk if (bp->b_dev == NODEV) { 23253452Sphk TAILQ_REMOVE(&mountlist, 23348225Smckusick bp->b_vp->v_mount, mnt_list); 23453023Sphk continue; 23553023Sphk } 23653023Sphk nbusy++; 23753023Sphk#if defined(SHOW_BUSYBUFS) || defined(DIAGNOSTIC) 23853023Sphk printf( 23953023Sphk "%d: dev:%s, flags:%08lx, blkno:%ld, lblkno:%ld\n", 24053023Sphk nbusy, devtoname(bp->b_dev), 24153023Sphk bp->b_flags, (long)bp->b_blkno, 24253023Sphk (long)bp->b_lblkno); 24353023Sphk#endif 24446568Speter } 24541137Smsmith } 24617658Sjulian if (nbusy) { 24717658Sjulian /* 24817658Sjulian * Failed to sync all blocks. Indicate this and don't 24917658Sjulian * unmount filesystems (thus forcing an fsck on reboot). 25017658Sjulian */ 25153023Sphk printf("giving up on %d buffers\n", nbusy); 25217658Sjulian DELAY(5000000); /* 5 seconds */ 25317658Sjulian } else { 25417658Sjulian printf("done\n"); 25517658Sjulian /* 25617658Sjulian * Unmount filesystems 25717658Sjulian */ 25817658Sjulian if (panicstr == 0) 25917658Sjulian vfs_unmountall(); 26017658Sjulian } 26139237Sgibbs DELAY(100000); /* wait for console output to finish */ 26217658Sjulian } 26327997Sjulian 26427997Sjulian /* 26527997Sjulian * Ok, now do things that assume all filesystem activity has 26627997Sjulian * been completed. 26727997Sjulian */ 26850107Smsmith EVENTHANDLER_INVOKE(shutdown_post_sync, howto); 26939237Sgibbs splhigh(); 27039522Sdt if ((howto & (RB_HALT|RB_DUMP)) == RB_DUMP && !cold) { 27139237Sgibbs savectx(&dumppcb); 27239237Sgibbs#ifdef __i386__ 27339237Sgibbs dumppcb.pcb_cr3 = rcr3(); 27439237Sgibbs#endif 27539237Sgibbs dumpsys(); 27617768Sjulian } 27739237Sgibbs 27839237Sgibbs /* Now that we're going to really halt the system... */ 27950107Smsmith EVENTHANDLER_INVOKE(shutdown_final, howto); 28039237Sgibbs 28150107Smsmith for(;;) ; /* safety against shutdown_reset not working */ 28250107Smsmith /* NOTREACHED */ 28350107Smsmith} 28450107Smsmith 28550107Smsmith/* 28650107Smsmith * If the shutdown was a clean halt, behave accordingly. 28750107Smsmith */ 28850107Smsmithstatic void 28950107Smsmithshutdown_halt(void *junk, int howto) 29050107Smsmith{ 29117658Sjulian if (howto & RB_HALT) { 29217658Sjulian printf("\n"); 29317658Sjulian printf("The operating system has halted.\n"); 29417658Sjulian printf("Please press any key to reboot.\n\n"); 29519274Sjulian switch (cngetc()) { 29619274Sjulian case -1: /* No console, just die */ 29719274Sjulian cpu_halt(); 29819274Sjulian /* NOTREACHED */ 29919274Sjulian default: 30039237Sgibbs howto &= ~RB_HALT; 30119274Sjulian break; 30219274Sjulian } 30350107Smsmith } 30450107Smsmith} 30517658Sjulian 30650107Smsmith/* 30750107Smsmith * Check to see if the system paniced, pause and then reboot 30850107Smsmith * according to the specified delay. 30950107Smsmith */ 31050107Smsmithstatic void 31150107Smsmithshutdown_panic(void *junk, int howto) 31250107Smsmith{ 31350107Smsmith int loop; 31450107Smsmith 31550107Smsmith if (howto & RB_DUMP) { 31639237Sgibbs if (PANIC_REBOOT_WAIT_TIME != 0) { 31739237Sgibbs if (PANIC_REBOOT_WAIT_TIME != -1) { 31839237Sgibbs printf("Automatic reboot in %d seconds - " 31939237Sgibbs "press a key on the console to abort\n", 32039237Sgibbs PANIC_REBOOT_WAIT_TIME); 32139237Sgibbs for (loop = PANIC_REBOOT_WAIT_TIME * 10; 32239237Sgibbs loop > 0; --loop) { 32339237Sgibbs DELAY(1000 * 100); /* 1/10th second */ 32439237Sgibbs /* Did user type a key? */ 32539237Sgibbs if (cncheckc() != -1) 32639237Sgibbs break; 32717658Sjulian } 32839237Sgibbs if (!loop) 32950107Smsmith return; 33017658Sjulian } 33139237Sgibbs } else { /* zero time specified - reboot NOW */ 33250107Smsmith return; 33317658Sjulian } 33439237Sgibbs printf("--> Press a key on the console to reboot <--\n"); 33539237Sgibbs cngetc(); 33617658Sjulian } 33750107Smsmith} 33850107Smsmith 33950107Smsmith/* 34050107Smsmith * Everything done, now reset 34150107Smsmith */ 34250107Smsmithstatic void 34350107Smsmithshutdown_reset(void *junk, int howto) 34450107Smsmith{ 34517658Sjulian printf("Rebooting...\n"); 34617658Sjulian DELAY(1000000); /* wait 1 sec for printf's to complete and be read */ 34717677Sjulian /* cpu_boot(howto); */ /* doesn't do anything at the moment */ 34817658Sjulian cpu_reset(); 34950107Smsmith /* NOTREACHED */ /* assuming reset worked */ 35017658Sjulian} 35117658Sjulian 35217658Sjulian/* 35317658Sjulian * Magic number for savecore 35417658Sjulian * 35517658Sjulian * exported (symorder) and used at least by savecore(8) 35617658Sjulian * 35717658Sjulian */ 35817658Sjulianstatic u_long const dumpmag = 0x8fca0101UL; 35917658Sjulian 36017658Sjulianstatic int dumpsize = 0; /* also for savecore */ 36117658Sjulian 36217658Sjulianstatic int dodump = 1; 36317658Sjulian 36448868SphkSYSCTL_INT(_machdep, OID_AUTO, do_dump, CTLFLAG_RW, &dodump, 0, 36548868Sphk "Try to perform coredump on kernel panic"); 36648868Sphk 36748868Sphkstatic int 36848868Sphksetdumpdev(dev) 36948868Sphk dev_t dev; 37048868Sphk{ 37150571Sphk int psize; 37248868Sphk long newdumplo; 37348868Sphk 37448868Sphk if (dev == NODEV) { 37548868Sphk dumpdev = dev; 37648868Sphk return (0); 37748868Sphk } 37849679Sphk if (devsw(dev) == NULL) 37948868Sphk return (ENXIO); /* XXX is this right? */ 38049679Sphk if (devsw(dev)->d_psize == NULL) 38148868Sphk return (ENXIO); /* XXX should be ENODEV ? */ 38249679Sphk psize = devsw(dev)->d_psize(dev); 38348868Sphk if (psize == -1) 38448868Sphk return (ENXIO); /* XXX should be ENODEV ? */ 38548868Sphk /* 38650571Sphk * XXX should clean up checking in dumpsys() to be more like this. 38748868Sphk */ 38848868Sphk newdumplo = psize - Maxmem * PAGE_SIZE / DEV_BSIZE; 38948868Sphk if (newdumplo < 0) 39048868Sphk return (ENOSPC); 39148868Sphk dumpdev = dev; 39248868Sphk dumplo = newdumplo; 39348868Sphk return (0); 39448868Sphk} 39548868Sphk 39648868Sphk 39731403Sjulian/* ARGSUSED */ 39831403Sjulianstatic void dump_conf __P((void *dummy)); 39931403Sjulianstatic void 40031403Sjuliandump_conf(dummy) 40131403Sjulian void *dummy; 40231403Sjulian{ 40348868Sphk if (setdumpdev(dumpdev) != 0) 40448868Sphk dumpdev = NODEV; 40531403Sjulian} 40648868Sphk 40731403SjulianSYSINIT(dump_conf, SI_SUB_DUMP_CONF, SI_ORDER_FIRST, dump_conf, NULL) 40831403Sjulian 40948868Sphkstatic int 41048868Sphksysctl_kern_dumpdev SYSCTL_HANDLER_ARGS 41148868Sphk{ 41248868Sphk int error; 41348868Sphk udev_t ndumpdev; 41448868Sphk 41548948Sgreen ndumpdev = dev2budev(dumpdev); 41648868Sphk error = sysctl_handle_opaque(oidp, &ndumpdev, sizeof ndumpdev, req); 41748868Sphk if (error == 0 && req->newptr != NULL) 41848868Sphk error = setdumpdev(udev2dev(ndumpdev, 1)); 41948868Sphk return (error); 42048868Sphk} 42148868Sphk 42248868SphkSYSCTL_PROC(_kern, KERN_DUMPDEV, dumpdev, CTLTYPE_OPAQUE|CTLFLAG_RW, 42348868Sphk 0, sizeof dumpdev, sysctl_kern_dumpdev, "T,dev_t", ""); 42448868Sphk 42517658Sjulian/* 42617658Sjulian * Doadump comes here after turning off memory management and 42717658Sjulian * getting on the dump stack, either when called above, or by 42817658Sjulian * the auto-restart code. 42917658Sjulian */ 43017658Sjulianstatic void 43117658Sjuliandumpsys(void) 43217658Sjulian{ 43349627Salfred int error; 43450571Sphk static int dumping; 43517658Sjulian 43650571Sphk if (dumping++) { 43750571Sphk printf("Dump already in progress, bailing...\n"); 43850571Sphk return; 43950571Sphk } 44017658Sjulian if (!dodump) 44117658Sjulian return; 44217658Sjulian if (dumpdev == NODEV) 44317658Sjulian return; 44449679Sphk if (!(devsw(dumpdev))) 44517658Sjulian return; 44649679Sphk if (!(devsw(dumpdev)->d_dump)) 44717658Sjulian return; 44817658Sjulian dumpsize = Maxmem; 44950571Sphk printf("\ndumping to dev %s, offset %ld\n", devtoname(dumpdev), dumplo); 45017658Sjulian printf("dump "); 45149679Sphk error = (*devsw(dumpdev)->d_dump)(dumpdev); 45249627Salfred if (error == 0) { 45349627Salfred printf("succeeded\n"); 45449627Salfred return; 45549627Salfred } 45649627Salfred printf("failed, reason: "); 45749627Salfred switch (error) { 45849627Salfred case ENODEV: 45949627Salfred printf("device doesn't support a dump routine\n"); 46049627Salfred break; 46117658Sjulian 46217658Sjulian case ENXIO: 46317658Sjulian printf("device bad\n"); 46417658Sjulian break; 46517658Sjulian 46617658Sjulian case EFAULT: 46717658Sjulian printf("device not ready\n"); 46817658Sjulian break; 46917658Sjulian 47017658Sjulian case EINVAL: 47117658Sjulian printf("area improper\n"); 47217658Sjulian break; 47317658Sjulian 47417658Sjulian case EIO: 47517658Sjulian printf("i/o error\n"); 47617658Sjulian break; 47717658Sjulian 47817658Sjulian case EINTR: 47917658Sjulian printf("aborted from console\n"); 48017658Sjulian break; 48117658Sjulian 48217658Sjulian default: 48349627Salfred printf("unknown, error = %d\n", error); 48417658Sjulian break; 48517658Sjulian } 48617658Sjulian} 48717658Sjulian 48817658Sjulian/* 48917658Sjulian * Panic is called on unresolvable fatal errors. It prints "panic: mesg", 49017658Sjulian * and then reboots. If we are called twice, then we avoid trying to sync 49117658Sjulian * the disks as this often leads to recursive panics. 49217658Sjulian */ 49317658Sjulianvoid 49417658Sjulianpanic(const char *fmt, ...) 49517658Sjulian{ 49617658Sjulian int bootopt; 49717658Sjulian va_list ap; 49838874Sache static char buf[256]; 49917658Sjulian 50017658Sjulian bootopt = RB_AUTOBOOT | RB_DUMP; 50117658Sjulian if (panicstr) 50217658Sjulian bootopt |= RB_NOSYNC; 50317658Sjulian else 50417658Sjulian panicstr = fmt; 50517658Sjulian 50617658Sjulian va_start(ap, fmt); 50741514Sarchie (void)vsnprintf(buf, sizeof(buf), fmt, ap); 50838874Sache if (panicstr == fmt) 50938874Sache panicstr = buf; 51017658Sjulian va_end(ap); 51138874Sache printf("panic: %s\n", buf); 51226100Sfsmp#ifdef SMP 51329128Speter /* three seperate prints in case of an unmapped page and trap */ 51429128Speter printf("mp_lock = %08x; ", mp_lock); 51529128Speter printf("cpuid = %d; ", cpuid); 51629128Speter printf("lapic.id = %08x\n", lapic.id); 51726100Sfsmp#endif 51817658Sjulian 51917658Sjulian#if defined(DDB) 52017658Sjulian if (debugger_on_panic) 52117658Sjulian Debugger ("panic"); 52217658Sjulian#endif 52317658Sjulian boot(bootopt); 52417658Sjulian} 52517658Sjulian 52617768Sjulian/* 52743436Smsmith * Support for poweroff delay. 52843436Smsmith */ 52943436Smsmithstatic int poweroff_delay = 0; 53043436SmsmithSYSCTL_INT(_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW, 53143436Smsmith &poweroff_delay, 0, ""); 53243436Smsmith 53350107Smsmithstatic void 53450107Smsmithpoweroff_wait(void *junk, int howto) 53543436Smsmith{ 53643436Smsmith if(!(howto & RB_POWEROFF) || poweroff_delay <= 0) 53743436Smsmith return; 53843436Smsmith DELAY(poweroff_delay * 1000); 53943436Smsmith} 540