kern_shutdown.c revision 50253
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 3950253Sbde * $Id: kern_shutdown.c,v 1.61 1999/08/21 06:24:20 msmith Exp $ 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/malloc.h> 5517658Sjulian#include <sys/kernel.h> 5621776Sbde#include <sys/mount.h> 5739237Sgibbs#include <sys/queue.h> 5817658Sjulian#include <sys/sysctl.h> 5917658Sjulian#include <sys/conf.h> 6017658Sjulian#include <sys/sysproto.h> 6149558Sphk#include <sys/cons.h> 6217658Sjulian 6317658Sjulian#include <machine/pcb.h> 6417658Sjulian#include <machine/clock.h> 6517658Sjulian#include <machine/md_var.h> 6626812Speter#ifdef SMP 6726812Speter#include <machine/smp.h> /* smp_active, cpuid */ 6826812Speter#endif 6917658Sjulian 7017658Sjulian#include <sys/signalvar.h> 7117658Sjulian 7217658Sjulian#ifndef PANIC_REBOOT_WAIT_TIME 7317658Sjulian#define PANIC_REBOOT_WAIT_TIME 15 /* default to 15 seconds */ 7417658Sjulian#endif 7517658Sjulian 7617658Sjulian/* 7717658Sjulian * Note that stdarg.h and the ANSI style va_start macro is used for both 7817658Sjulian * ANSI and traditional C compilers. 7917658Sjulian */ 8017658Sjulian#include <machine/stdarg.h> 8117658Sjulian 8228769Sbde#ifdef DDB 8317658Sjulian#ifdef DDB_UNATTENDED 8442135Smsmithint debugger_on_panic = 0; 8517658Sjulian#else 8642135Smsmithint debugger_on_panic = 1; 8717658Sjulian#endif 8817658SjulianSYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW, 8946381Sbillf &debugger_on_panic, 0, "Run debugger on kernel panic"); 9017658Sjulian#endif 9117658Sjulian 9243436SmsmithSYSCTL_NODE(_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0, "Shutdown environment"); 9343436Smsmith 9428000Sjulian#ifdef HW_WDOG 9517658Sjulian/* 9627997Sjulian * If there is a hardware watchdog, point this at the function needed to 9727997Sjulian * hold it off. 9827997Sjulian * It's needed when the kernel needs to do some lengthy operations. 9927997Sjulian * e.g. in wd.c when dumping core.. It's most annoying to have 10027997Sjulian * your precious core-dump only half written because the wdog kicked in. 10127997Sjulian */ 10227997Sjulianwatchdog_tickle_fn wdog_tickler = NULL; 10328000Sjulian#endif /* HW_WDOG */ 10427997Sjulian 10527997Sjulian/* 10617658Sjulian * Variable panicstr contains argument to first call to panic; used as flag 10717658Sjulian * to indicate that the kernel has already called panic. 10817658Sjulian */ 10917658Sjulianconst char *panicstr; 11017658Sjulian 11131275Sbdestatic void boot __P((int)) __dead2; 11231275Sbdestatic void dumpsys __P((void)); 11348868Sphkstatic int setdumpdev __P((dev_t dev)); 11450107Smsmithstatic void poweroff_wait __P((void *, int)); 11550107Smsmithstatic void shutdown_halt __P((void *junk, int howto)); 11650107Smsmithstatic void shutdown_panic __P((void *junk, int howto)); 11750107Smsmithstatic void shutdown_reset __P((void *junk, int howto)); 11817658Sjulian 11950107Smsmith/* register various local shutdown events */ 12050107Smsmithstatic void 12150107Smsmithshutdown_conf(void *unused) 12250107Smsmith{ 12350107Smsmith EVENTHANDLER_REGISTER(shutdown_final, poweroff_wait, NULL, SHUTDOWN_PRI_FIRST); 12450107Smsmith EVENTHANDLER_REGISTER(shutdown_final, shutdown_halt, NULL, SHUTDOWN_PRI_LAST + 100); 12550107Smsmith EVENTHANDLER_REGISTER(shutdown_final, shutdown_panic, NULL, SHUTDOWN_PRI_LAST + 100); 12650107Smsmith EVENTHANDLER_REGISTER(shutdown_final, shutdown_reset, NULL, SHUTDOWN_PRI_LAST + 200); 12750107Smsmith} 12848868Sphk 12950107SmsmithSYSINIT(shutdown_conf, SI_SUB_INTRINSIC, SI_ORDER_ANY, shutdown_conf, NULL) 13050107Smsmith 13117658Sjulian/* ARGSUSED */ 13217658Sjulian 13317658Sjulian/* 13417658Sjulian * The system call that results in a reboot 13517658Sjulian */ 13617658Sjulianint 13730994Sphkreboot(p, uap) 13817658Sjulian struct proc *p; 13917658Sjulian struct reboot_args *uap; 14017658Sjulian{ 14117658Sjulian int error; 14217658Sjulian 14346112Sphk if ((error = suser(p))) 14417658Sjulian return (error); 14517658Sjulian 14617658Sjulian boot(uap->opt); 14717658Sjulian return (0); 14817658Sjulian} 14917658Sjulian 15017658Sjulian/* 15117658Sjulian * Called by events that want to shut down.. e.g <CTL><ALT><DEL> on a PC 15217658Sjulian */ 15317658Sjulianvoid 15428769Sbdeshutdown_nice() 15517658Sjulian{ 15617658Sjulian /* Send a signal to init(8) and have it shutdown the world */ 15717658Sjulian if (initproc != NULL) { 15817658Sjulian psignal(initproc, SIGINT); 15917658Sjulian } else { 16017658Sjulian /* No init(8) running, so simply reboot */ 16117658Sjulian boot(RB_NOSYNC); 16217658Sjulian } 16317658Sjulian return; 16417658Sjulian} 16517658Sjulianstatic int waittime = -1; 16617658Sjulianstatic struct pcb dumppcb; 16717658Sjulian 16817658Sjulian/* 16917658Sjulian * Go through the rigmarole of shutting down.. 17017658Sjulian * this used to be in machdep.c but I'll be dammned if I could see 17117658Sjulian * anything machine dependant in it. 17217658Sjulian */ 17331275Sbdestatic void 17417658Sjulianboot(howto) 17517658Sjulian int howto; 17617658Sjulian{ 17717658Sjulian 17825164Speter#ifdef SMP 17925164Speter if (smp_active) { 18026812Speter printf("boot() called on cpu#%d\n", cpuid); 18125164Speter } 18225164Speter#endif 18327997Sjulian /* 18427997Sjulian * Do any callouts that should be done BEFORE syncing the filesystems. 18527997Sjulian */ 18650107Smsmith EVENTHANDLER_INVOKE(shutdown_pre_sync, howto); 18727997Sjulian 18827997Sjulian /* 18927997Sjulian * Now sync filesystems 19027997Sjulian */ 19117658Sjulian if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) { 19217658Sjulian register struct buf *bp; 19317658Sjulian int iter, nbusy; 19417658Sjulian 19517658Sjulian waittime = 0; 19617658Sjulian printf("\nsyncing disks... "); 19717658Sjulian 19830994Sphk sync(&proc0, NULL); 19917658Sjulian 20034266Sjulian /* 20134266Sjulian * With soft updates, some buffers that are 20234266Sjulian * written will be remarked as dirty until other 20334266Sjulian * buffers are written. 20434266Sjulian */ 20517658Sjulian for (iter = 0; iter < 20; iter++) { 20617658Sjulian nbusy = 0; 20717658Sjulian for (bp = &buf[nbuf]; --bp >= buf; ) { 20848225Smckusick if ((bp->b_flags & B_INVAL) == 0 && 20948225Smckusick BUF_REFCNT(bp) > 0) { 21017658Sjulian nbusy++; 21134266Sjulian } else if ((bp->b_flags & (B_DELWRI | B_INVAL)) 21234266Sjulian == B_DELWRI) { 21334266Sjulian /* bawrite(bp);*/ 21434266Sjulian nbusy++; 21517658Sjulian } 21617658Sjulian } 21717658Sjulian if (nbusy == 0) 21817658Sjulian break; 21917658Sjulian printf("%d ", nbusy); 22034266Sjulian sync(&proc0, NULL); 22134266Sjulian DELAY(50000 * iter); 22217658Sjulian } 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)) { 23148225Smckusick if (bp->b_dev == NODEV) 23248225Smckusick CIRCLEQ_REMOVE(&mountlist, 23348225Smckusick bp->b_vp->v_mount, mnt_list); 23441137Smsmith else 23541137Smsmith nbusy++; 23646568Speter } 23741137Smsmith 23841137Smsmith 23941137Smsmith } 24017658Sjulian if (nbusy) { 24117658Sjulian /* 24217658Sjulian * Failed to sync all blocks. Indicate this and don't 24317658Sjulian * unmount filesystems (thus forcing an fsck on reboot). 24417658Sjulian */ 24517658Sjulian printf("giving up\n"); 24617658Sjulian#ifdef SHOW_BUSYBUFS 24717658Sjulian nbusy = 0; 24817658Sjulian for (bp = &buf[nbuf]; --bp >= buf; ) { 24948225Smckusick if ((bp->b_flags & B_INVAL) == 0 && 25048225Smckusick BUF_REFCNT(bp) > 0) { 25117658Sjulian nbusy++; 25237555Sbde printf( 25350253Sbde "%d: dev:%s, flags:%08lx, blkno:%ld, lblkno:%ld\n", 25450253Sbde nbusy, devtoname(bp->b_dev), 25537555Sbde bp->b_flags, (long)bp->b_blkno, 25637555Sbde (long)bp->b_lblkno); 25717658Sjulian } 25817658Sjulian } 25917658Sjulian DELAY(5000000); /* 5 seconds */ 26017658Sjulian#endif 26117658Sjulian } else { 26217658Sjulian printf("done\n"); 26317658Sjulian /* 26417658Sjulian * Unmount filesystems 26517658Sjulian */ 26617658Sjulian if (panicstr == 0) 26717658Sjulian vfs_unmountall(); 26817658Sjulian } 26939237Sgibbs DELAY(100000); /* wait for console output to finish */ 27017658Sjulian } 27127997Sjulian 27227997Sjulian /* 27327997Sjulian * Ok, now do things that assume all filesystem activity has 27427997Sjulian * been completed. 27527997Sjulian */ 27650107Smsmith EVENTHANDLER_INVOKE(shutdown_post_sync, howto); 27739237Sgibbs splhigh(); 27839522Sdt if ((howto & (RB_HALT|RB_DUMP)) == RB_DUMP && !cold) { 27939237Sgibbs savectx(&dumppcb); 28039237Sgibbs#ifdef __i386__ 28139237Sgibbs dumppcb.pcb_cr3 = rcr3(); 28239237Sgibbs#endif 28339237Sgibbs dumpsys(); 28417768Sjulian } 28539237Sgibbs 28639237Sgibbs /* Now that we're going to really halt the system... */ 28750107Smsmith EVENTHANDLER_INVOKE(shutdown_final, howto); 28839237Sgibbs 28950107Smsmith for(;;) ; /* safety against shutdown_reset not working */ 29050107Smsmith /* NOTREACHED */ 29150107Smsmith} 29250107Smsmith 29350107Smsmith/* 29450107Smsmith * If the shutdown was a clean halt, behave accordingly. 29550107Smsmith */ 29650107Smsmithstatic void 29750107Smsmithshutdown_halt(void *junk, int howto) 29850107Smsmith{ 29917658Sjulian if (howto & RB_HALT) { 30017658Sjulian printf("\n"); 30117658Sjulian printf("The operating system has halted.\n"); 30217658Sjulian printf("Please press any key to reboot.\n\n"); 30319274Sjulian switch (cngetc()) { 30419274Sjulian case -1: /* No console, just die */ 30519274Sjulian cpu_halt(); 30619274Sjulian /* NOTREACHED */ 30719274Sjulian default: 30839237Sgibbs howto &= ~RB_HALT; 30919274Sjulian break; 31019274Sjulian } 31150107Smsmith } 31250107Smsmith} 31317658Sjulian 31450107Smsmith/* 31550107Smsmith * Check to see if the system paniced, pause and then reboot 31650107Smsmith * according to the specified delay. 31750107Smsmith */ 31850107Smsmithstatic void 31950107Smsmithshutdown_panic(void *junk, int howto) 32050107Smsmith{ 32150107Smsmith int loop; 32250107Smsmith 32350107Smsmith if (howto & RB_DUMP) { 32439237Sgibbs if (PANIC_REBOOT_WAIT_TIME != 0) { 32539237Sgibbs if (PANIC_REBOOT_WAIT_TIME != -1) { 32639237Sgibbs printf("Automatic reboot in %d seconds - " 32739237Sgibbs "press a key on the console to abort\n", 32839237Sgibbs PANIC_REBOOT_WAIT_TIME); 32939237Sgibbs for (loop = PANIC_REBOOT_WAIT_TIME * 10; 33039237Sgibbs loop > 0; --loop) { 33139237Sgibbs DELAY(1000 * 100); /* 1/10th second */ 33239237Sgibbs /* Did user type a key? */ 33339237Sgibbs if (cncheckc() != -1) 33439237Sgibbs break; 33517658Sjulian } 33639237Sgibbs if (!loop) 33750107Smsmith return; 33817658Sjulian } 33939237Sgibbs } else { /* zero time specified - reboot NOW */ 34050107Smsmith return; 34117658Sjulian } 34239237Sgibbs printf("--> Press a key on the console to reboot <--\n"); 34339237Sgibbs cngetc(); 34417658Sjulian } 34550107Smsmith} 34650107Smsmith 34750107Smsmith/* 34850107Smsmith * Everything done, now reset 34950107Smsmith */ 35050107Smsmithstatic void 35150107Smsmithshutdown_reset(void *junk, int howto) 35250107Smsmith{ 35317658Sjulian printf("Rebooting...\n"); 35417658Sjulian DELAY(1000000); /* wait 1 sec for printf's to complete and be read */ 35517677Sjulian /* cpu_boot(howto); */ /* doesn't do anything at the moment */ 35617658Sjulian cpu_reset(); 35750107Smsmith /* NOTREACHED */ /* assuming reset worked */ 35817658Sjulian} 35917658Sjulian 36017658Sjulian/* 36117658Sjulian * Magic number for savecore 36217658Sjulian * 36317658Sjulian * exported (symorder) and used at least by savecore(8) 36417658Sjulian * 36517658Sjulian */ 36617658Sjulianstatic u_long const dumpmag = 0x8fca0101UL; 36717658Sjulian 36817658Sjulianstatic int dumpsize = 0; /* also for savecore */ 36917658Sjulian 37017658Sjulianstatic int dodump = 1; 37117658Sjulian 37248868SphkSYSCTL_INT(_machdep, OID_AUTO, do_dump, CTLFLAG_RW, &dodump, 0, 37348868Sphk "Try to perform coredump on kernel panic"); 37448868Sphk 37548868Sphkstatic int 37648868Sphksetdumpdev(dev) 37748868Sphk dev_t dev; 37848868Sphk{ 37948868Sphk int maj, psize; 38048868Sphk long newdumplo; 38148868Sphk 38248868Sphk if (dev == NODEV) { 38348868Sphk dumpdev = dev; 38448868Sphk return (0); 38548868Sphk } 38648868Sphk maj = major(dev); 38749679Sphk if (devsw(dev) == NULL) 38848868Sphk return (ENXIO); /* XXX is this right? */ 38949679Sphk if (devsw(dev)->d_psize == NULL) 39048868Sphk return (ENXIO); /* XXX should be ENODEV ? */ 39149679Sphk psize = devsw(dev)->d_psize(dev); 39248868Sphk if (psize == -1) 39348868Sphk return (ENXIO); /* XXX should be ENODEV ? */ 39448868Sphk /* 39548868Sphk * XXX should clean up checking in dumpsys() to be more like this, 39648868Sphk * and nuke dodump sysctl (too many knobs). 39748868Sphk */ 39848868Sphk newdumplo = psize - Maxmem * PAGE_SIZE / DEV_BSIZE; 39948868Sphk if (newdumplo < 0) 40048868Sphk return (ENOSPC); 40148868Sphk dumpdev = dev; 40248868Sphk dumplo = newdumplo; 40348868Sphk return (0); 40448868Sphk} 40548868Sphk 40648868Sphk 40731403Sjulian/* ARGSUSED */ 40831403Sjulianstatic void dump_conf __P((void *dummy)); 40931403Sjulianstatic void 41031403Sjuliandump_conf(dummy) 41131403Sjulian void *dummy; 41231403Sjulian{ 41348868Sphk if (setdumpdev(dumpdev) != 0) 41448868Sphk dumpdev = NODEV; 41531403Sjulian} 41648868Sphk 41731403SjulianSYSINIT(dump_conf, SI_SUB_DUMP_CONF, SI_ORDER_FIRST, dump_conf, NULL) 41831403Sjulian 41948868Sphkstatic int 42048868Sphksysctl_kern_dumpdev SYSCTL_HANDLER_ARGS 42148868Sphk{ 42248868Sphk int error; 42348868Sphk udev_t ndumpdev; 42448868Sphk 42548948Sgreen ndumpdev = dev2budev(dumpdev); 42648868Sphk error = sysctl_handle_opaque(oidp, &ndumpdev, sizeof ndumpdev, req); 42748868Sphk if (error == 0 && req->newptr != NULL) 42848868Sphk error = setdumpdev(udev2dev(ndumpdev, 1)); 42948868Sphk return (error); 43048868Sphk} 43148868Sphk 43248868SphkSYSCTL_PROC(_kern, KERN_DUMPDEV, dumpdev, CTLTYPE_OPAQUE|CTLFLAG_RW, 43348868Sphk 0, sizeof dumpdev, sysctl_kern_dumpdev, "T,dev_t", ""); 43448868Sphk 43517658Sjulian/* 43617658Sjulian * Doadump comes here after turning off memory management and 43717658Sjulian * getting on the dump stack, either when called above, or by 43817658Sjulian * the auto-restart code. 43917658Sjulian */ 44017658Sjulianstatic void 44117658Sjuliandumpsys(void) 44217658Sjulian{ 44349627Salfred int error; 44417658Sjulian 44517658Sjulian if (!dodump) 44617658Sjulian return; 44717658Sjulian if (dumpdev == NODEV) 44817658Sjulian return; 44949679Sphk if (!(devsw(dumpdev))) 45017658Sjulian return; 45149679Sphk if (!(devsw(dumpdev)->d_dump)) 45217658Sjulian return; 45317658Sjulian dumpsize = Maxmem; 45447084Speter printf("\ndumping to dev (%d,%d), offset %ld\n", 45547084Speter major(dumpdev), minor(dumpdev), dumplo); 45617658Sjulian printf("dump "); 45749679Sphk error = (*devsw(dumpdev)->d_dump)(dumpdev); 45849627Salfred if (error == 0) { 45949627Salfred printf("succeeded\n"); 46049627Salfred return; 46149627Salfred } 46249627Salfred printf("failed, reason: "); 46349627Salfred switch (error) { 46449627Salfred case ENODEV: 46549627Salfred printf("device doesn't support a dump routine\n"); 46649627Salfred break; 46717658Sjulian 46817658Sjulian case ENXIO: 46917658Sjulian printf("device bad\n"); 47017658Sjulian break; 47117658Sjulian 47217658Sjulian case EFAULT: 47317658Sjulian printf("device not ready\n"); 47417658Sjulian break; 47517658Sjulian 47617658Sjulian case EINVAL: 47717658Sjulian printf("area improper\n"); 47817658Sjulian break; 47917658Sjulian 48017658Sjulian case EIO: 48117658Sjulian printf("i/o error\n"); 48217658Sjulian break; 48317658Sjulian 48417658Sjulian case EINTR: 48517658Sjulian printf("aborted from console\n"); 48617658Sjulian break; 48717658Sjulian 48817658Sjulian default: 48949627Salfred printf("unknown, error = %d\n", error); 49017658Sjulian break; 49117658Sjulian } 49217658Sjulian} 49317658Sjulian 49417658Sjulian/* 49517658Sjulian * Panic is called on unresolvable fatal errors. It prints "panic: mesg", 49617658Sjulian * and then reboots. If we are called twice, then we avoid trying to sync 49717658Sjulian * the disks as this often leads to recursive panics. 49817658Sjulian */ 49917658Sjulianvoid 50017658Sjulianpanic(const char *fmt, ...) 50117658Sjulian{ 50217658Sjulian int bootopt; 50317658Sjulian va_list ap; 50438874Sache static char buf[256]; 50517658Sjulian 50617658Sjulian bootopt = RB_AUTOBOOT | RB_DUMP; 50717658Sjulian if (panicstr) 50817658Sjulian bootopt |= RB_NOSYNC; 50917658Sjulian else 51017658Sjulian panicstr = fmt; 51117658Sjulian 51217658Sjulian va_start(ap, fmt); 51341514Sarchie (void)vsnprintf(buf, sizeof(buf), fmt, ap); 51438874Sache if (panicstr == fmt) 51538874Sache panicstr = buf; 51617658Sjulian va_end(ap); 51738874Sache printf("panic: %s\n", buf); 51826100Sfsmp#ifdef SMP 51929128Speter /* three seperate prints in case of an unmapped page and trap */ 52029128Speter printf("mp_lock = %08x; ", mp_lock); 52129128Speter printf("cpuid = %d; ", cpuid); 52229128Speter printf("lapic.id = %08x\n", lapic.id); 52326100Sfsmp#endif 52417658Sjulian 52517658Sjulian#if defined(DDB) 52617658Sjulian if (debugger_on_panic) 52717658Sjulian Debugger ("panic"); 52817658Sjulian#endif 52917658Sjulian boot(bootopt); 53017658Sjulian} 53117658Sjulian 53217768Sjulian/* 53343436Smsmith * Support for poweroff delay. 53443436Smsmith */ 53543436Smsmithstatic int poweroff_delay = 0; 53643436SmsmithSYSCTL_INT(_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW, 53743436Smsmith &poweroff_delay, 0, ""); 53843436Smsmith 53950107Smsmithstatic void 54050107Smsmithpoweroff_wait(void *junk, int howto) 54143436Smsmith{ 54243436Smsmith if(!(howto & RB_POWEROFF) || poweroff_delay <= 0) 54343436Smsmith return; 54443436Smsmith DELAY(poweroff_delay * 1000); 54543436Smsmith} 546