Commit Graph

44 Commits

Author SHA1 Message Date
Mike Smith
9959b1a882 Improved DDB_UNATTENDED behaviour. From the submitter:
There's something that's been bugging me for a while, so I decided to fix it.
FreeBSD now will DTRT WRT DDB and DDB_UNATTENDED (!debugger_on_panic), at least
in my opinion. The behavior change is such that:

	1. Nothing changes when debugger_on_panic != 0.
	2. When DDB_UNATTENDED (!debugger_on_panic), if a panic occurs, the
		machine will reboot. Also, if a trap occurs, the machine will
		panic and reboot, unlike how it broke to DDB before. HOWEVER,
		a trap inside DDB will not cause a panic, allowing full use
		of DDB without having to worry about the machine being stuck
		at a DDB prompt if something goes wrong during the day.
		Patches for this behavior follow my signature, and it would
		be a boon to anyone (like me) who uses DDB_UNATTENDED, but
		actually wants the machine to panic on a trap (otherwise,
		what's the use, if the machine causes a fatal trap rather than
		a true panic, of debugger_on_panic?). The changes cause no
		adverse behavior, but do involve two symbols becoming global

Submitted by:	Brian Feldman <green@unixhelp.org>
1998-12-28 23:03:00 +00:00
Archie Cobbs
2127f26023 Examine all occurrences of sprintf(), strcat(), and str[n]cpy()
for possible buffer overflow problems. Replaced most sprintf()'s
with snprintf(); for others cases, added terminating NUL bytes where
appropriate, replaced constants like "16" with sizeof(), etc.

These changes include several bug fixes, but most changes are for
maintainability's sake. Any instance where it wasn't "immediately
obvious" that a buffer overflow could not occur was made safer.

Reviewed by:	Bruce Evans <bde@zeta.org.au>
Reviewed by:	Matthew Dillon <dillon@apollo.backplane.com>
Reviewed by:	Mike Spengler <mks@networkcs.com>
1998-12-04 22:54:57 +00:00
Mike Smith
d02d6d040a Don't count non-local dirty buffers as outstanding when shutting down.
This avoids the fsck-on-reboot symptoms if you're shutting down with a
hung or unreachable NFS server mounted.  Also remove non-local
filesystems from the mount list to prevent the system hanging when it tries
to unmount them (for the same reason).

Drew points out that there's a good argument for forcibly removing all
"non syncable" filesystems from the mount list (eg. NFS mounts, disks
that aren't responding, etc.) as this then allows you to sync and
cleanly unmount their parents.  No such change is included in this
patch.

Submitted by:	Andrew Gallatin <gallatin@cs.duke.edu>
1998-11-13 22:40:37 +00:00
Mike Smith
35d27a0f39 Add the ability to specify where on the at_shutdown queue a handler is
installed.

Remove cpu_power_down, and replace it with an entry at the end of the
SHUTDOWN_FINAL queue in the only place it's used (APM).

Submitted by:	Some ideas from Bruce Walter <walter@fortean.com>
1998-10-30 05:41:15 +00:00
Dmitrij Tejblum
a511bf18fe Fix precedence bug, so that kernel dump works. 1998-09-20 16:50:31 +00:00
Justin T. Gibbs
2cfa0a0381 Add a new at_shutdown queue, SHUTDOWN_FINAL. This queue is run at
splhigh() after any system dumps have completed.  SHUTDOWN_POST_SYNC
isn't quite late enough for disk controllers.

Converted at_shutdown queues to use the queue(3) macros.
1998-09-15 08:49:52 +00:00
Andrey A. Chernov
99237364cc Store formatted panic string in static buffer to make it available later
for savecore.
Previous code give only panic format to savecore
1998-09-06 06:25:18 +00:00
Dag-Erling Smørgrav
70d154a652 Don't check minor number of dump device at all.
Discussed-with: Jörg Wunsch
1998-08-23 14:18:08 +00:00
Dag-Erling Smørgrav
9103e8640c Include opt_devfs.h which defines SLICE, to make previous commit
meaningful.

Pointed out by:	Luoqi Chen
1998-08-19 20:20:52 +00:00
Dag-Erling Smørgrav
d08b9c139f Enable kernel dumps on SLICE systems. 1998-08-16 11:27:19 +00:00
Bruce Evans
ac1e407b32 Fixed printf format errors. 1998-07-11 07:46:16 +00:00
Doug Rabson
ecbb00a262 This commit fixes various 64bit portability problems required for
FreeBSD/alpha.  The most significant item is to change the command
argument to ioctl functions from int to u_long.  This change brings us
inline with various other BSD versions.  Driver writers may like to
use (__FreeBSD_version == 300003) to detect this change.

The prototype FreeBSD/alpha machdep will follow in a couple of days
time.
1998-06-07 17:13:14 +00:00
Tor Egge
2f1e70693d Add forwarding of roundrobin to other cpus. This gives a more regular
update of cpu usage as shown by top when one process is cpu bound
(no system calls) while the system is otherwise idle (except for top).

Don't attempt to switch to the BSP in boot().  If the system was idle when
an interrupt caused a panic, this won't work.  Instead, switch to the BSP
in cpu_reset.

Remove some spurious forward_statclock/forward_hardclock warnings.
1998-05-17 22:12:14 +00:00
Bruce Evans
b322fb5d76 Backed out previous commit. It is invalid to call d_ioctl() on
possibly non-open devices, and we don't want to restrict dumping
to swap devices anwyay.  It is especially invalid to call d_ioctl()
in non-process context for panics.  d_psize() can be called on
non-open devices, at least on non-SLICED ones that support d_dump(),
and setdumpdev() has depended on this for a long time although it
is probably wrong, but even d_psize() can't be called in non-process
context - that's why dumpsys() depends on previously computed values
although these values may be stale.  The historical restriction to
devices with dkpart(dev) == SWAP_PART should go away.
1998-05-12 17:34:02 +00:00
Julian Elischer
7f2f1b784e Add dump support to the DEVFS/slice code.
now we can actually catch our crashes :-)

Submitted by: Luoqi Chen <luoqi@chen.ml.org> (the man who's everywhere)
1998-05-06 22:14:48 +00:00
Julian Elischer
b1897c197c Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman)
Submitted by:	Kirk McKusick (mcKusick@mckusick.com)
Obtained from:  WHistle development tree
1998-03-08 09:59:44 +00:00
Eivind Eklund
d94f38ace2 Add HW_WDOG to LINT, and turn it into a new-style option. 1998-02-16 23:57:49 +00:00
Julian Elischer
95802bf803 Shift a few SYSINT() calls around.
this results in a few functions becoming static, and
the SYSINITs being close to the code they are related to.
setting up the dump device is with dumpsys() and
kicking off the scheduler is with the scheduler.
Mounting root is with the code that does it.

Reviewed by: phk
1997-11-25 07:07:48 +00:00
Bruce Evans
fc8f7066d2 Get buffer stuff by #including <sys/buf.h> instead of <sys/vnode.h>.
Staticized boot().

Fixed a gratuitous ANSIism.
1997-11-18 15:16:43 +00:00
Poul-Henning Kamp
cb226aaa62 Move the "retval" (3rd) parameter from all syscall functions and put
it in struct proc instead.

This fixes a boatload of compiler warning, and removes a lot of cruft
from the sources.

I have not removed the /*ARGSUSED*/, they will require some looking at.

libkvm, ps and other userland struct proc frobbing programs will need
recompiled.
1997-11-06 19:29:57 +00:00
Peter Wemm
279a69322c Cosmetic adjustment for the trap/double fault/panic cpu id listing.
It now prints the apic id in hex rather than decimal.
1997-09-05 08:54:55 +00:00
Bruce Evans
e4ba6a82b0 Removed unused #includes. 1997-09-02 20:06:59 +00:00
Bruce Evans
6d58e6cbc4 Fixed options SHOW_BUSYBUFS and PANIC_REBOOT_WAIT_TIME which were broken
by incomplete cutting and pasting from machdep.c to kern_shutdown.c.

PR:		3953
1997-08-31 23:08:38 +00:00
Peter Wemm
90bcb528a8 Correct some things I forgot about until it was too late with smp_active.
smp_active = 1 used to indicate that the system had frozen previously
started AP's, while smp_active = 0 was "AP's not yet started".  I have split
this into smp_started (which is set when the AP's come online), and
smp_active is left for turning on/off AP scheduling.
1997-08-26 18:36:15 +00:00
Bruce Evans
9a629c9302 Fixed some formatting and style bugs.
Fixed a gratuitous ANSIism.
1997-08-26 00:24:25 +00:00
Julian Elischer
63fe995cb4 Teach both disk drivers how to cope with a hardware watchdog
while dumping core.. I'm tired of getting 1/2 of a core-dump

conditional on -DHW_WDOG for now
this will migrate to 2.2 as that's where I need it.
1997-08-09 01:44:25 +00:00
Julian Elischer
5230cfd2f4 Use up 4 precious bytes to give the kernel a hook to
support hardware watchdogs. The actual functions would be supplied in an LKM
or a linked file, but they need to hang off something.
1997-08-09 01:25:54 +00:00
Peter Wemm
b3196e4b9f Preliminary support for per-cpu data pages.
This eliminates a lot of #ifdef SMP type code.  Things like _curproc reside
in a data page that is unique on each cpu, eliminating the expensive macros
like:    #define curproc (SMPcurproc[cpunumber()])

There are some unresolved bootstrap and address space sharing issues at
present, but Steve is waiting on this for other work.  There is still some
strictly temporary code present that isn't exactly pretty.

This is part of a larger change that has run into some bumps, this part is
standalone so it should be safe.  The temporary code goes away when the
full idle cpu support is finished.

Reviewed by: fsmp, dyson
1997-06-22 16:04:22 +00:00
Garrett Wollman
3f7773458e When APM is configured, turn off the power when halting for good. 1997-06-15 02:03:03 +00:00
Steve Passe
47d818975b Move the printing of "cpu#%d" to AFTER the general panic argument string.
When a panic occurs early in the SMP boot process 'cpunumber()' hangs,
causing the panic string to be lost.  Now the system appears to hang
in 'breakpoint()', but at least the user sees the panic string before the
hang.
1997-05-24 18:35:44 +00:00
Peter Wemm
477a642cee Man the liferafts! Here comes the long awaited SMP -> -current merge!
There are various options documented in i386/conf/LINT, there is more to
come over the next few days.

The kernel should run pretty much "as before" without the options to
activate SMP mode.

There are a handful of known "loose ends" that need to be fixed, but
have been put off since the SMP kernel is in a moderately good condition
at the moment.

This commit is the result of the tinkering and testing over the last 14
months by many people.  A special thanks to Steve Passe for implementing
the APIC code!
1997-04-26 11:46:25 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Bruce Evans
ac0ad63f37 Reduced #include spam in <sys/sysproto.h> and fixed things that depended
on it.

makesyscalls.sh:
This parsed $Id$.  Fixed(?) to parse $FreeBSD$.  The output is wrong when
the id is not expanded in the source file.

syscalls.master:
Fixed declaration of sigsuspend().  There are still some bogons and
spam involving sigset_t.
Use `struct foo *' instead of the equivalent `foo_t *' for some nfs and
lfs syscalls so that <sys/sysproto.h> doesn't depend on <sys/mount.h>.
1997-01-16 15:58:32 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Julian Elischer
d13d3630fd Further improved version of hadling a HALT when there is no console. 1996-10-31 00:57:28 +00:00
Julian Elischer
75680b05c6 if there is no console, cngetc should act like getc and return -1
make callers aware of this in those cases where it can occur.
1996-10-30 21:40:25 +00:00
Bruce Evans
a7f8f2ab55 Changed cncheckc() interface so that it is 8-bit clean - return -1
instead of 0 if there is no input.
1996-09-14 04:31:09 +00:00
Bruce Evans
fc0b1dbf68 Don't use __dead in the kernel. It was an obfuscation for gcc >= 2.5
and a no-op for gcc >= 2.6.
1996-09-13 09:20:15 +00:00
Søren Schmidt
9191680051 Fixed two small leftovers form PHK's mega devconf removal commit.. 1996-09-07 19:13:09 +00:00
Poul-Henning Kamp
bfbb029d87 Remove devconf, it never grew up to be of any use. 1996-09-06 23:09:20 +00:00
Julian Elischer
18cb99e99f Remove the old cleanup code as it is no longer used..
also fix two cases of = instead of ==
(cut+paste bug duplication)
1996-08-26 21:47:56 +00:00
Julian Elischer
e0d898b48e Some cleanups to the callout lists recently added.
note that at_shutdown has a new parameter to indicate When
during a shutdown the callout should be made. also
add a RB_POWEROFF flag to reboot "howto" parameter..
tells the reboot code in our at_shutdown module to turn off the UPS
and kill the power. bound to be useful eventually on laptops
1996-08-22 03:50:33 +00:00
Julian Elischer
269fb9d764 Collect all the functioons concerned with rebooting into one place
also add the at_shutdown callout list, and change the one user of
the present (broken) method (the vn driver) to use the new scheme.
1996-08-19 20:07:07 +00:00
Julian Elischer
ad4240fec4 move all functions related to shutting down to one file
called kern_shutdown.c

note: I couldn't see anything machine dependant in the
functions boot() and dumpsys() which were in machdep.c
I have left a prototype for cpu_boot() which would go in
machdep.c, but I have nothing to put in it. Iexpect others will
let me know in no uncertain ways that this or that  is machine dependant
and should be there, but I'll way for that to happen.. :)

I haven't actually taken the functions OUT of machdep
or anywhere else yet.. I'm checking in this file so others can have a look
at it and comment. SO PLEASE DO COMMENT!

I am also (in another checkin) addinf a man(9) page for the new
at_shotdown().. er freudian slip there.. at_shutdown() call
so have a look at that (and at_exit and at_fork as well)
and feed me comments..

I'll heck in the changes to make these (shutdown) changes active tomorrow
if no-one objects too strongly..
1996-08-19 02:19:23 +00:00