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From: dcon@cbnewsc.att.com (david.r.connet)
Newsgroups: comp.unix.sysv386
Subject: Re: Kernel core dumps (was Re: out of swap space??)
Keywords: forced panic
Message-ID: <1991May13.204435.3138@cbnewsc.att.com>
Date: 13 May 91 20:44:35 GMT
References: <1991May4.232044.3487@NCoast.ORG> <9105122137.aa00923@art-sy.detroit.mi.us> <1991May13.162909.20686@turnkey.tcc.com>
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 46

In article <1991May13.162909.20686@turnkey.tcc.com> jackv@turnkey.TCC.COM (Jack F. Vogel) writes:
>In article <9105122137.aa00923@art-sy.detroit.mi.us> chap@art-sy.detroit.mi.us (j chapman flack) writes:
>[ wants a way to force a system panic...]
> 
>>One person suggested using the kernel debugger; several suggested using
>>`crash' to look at the running system.  I don't have a development system
>>and I haven't found anything lying around that looks like a kernel debugger,
>>so I doubt that linking that in is an option for me.
> 
>You don't need the development system, and the "debugger" is not some binary
>that you would find "lying around". It should be an option in linking your
>kernel. I don't know how far SCO varies from the AT&T standard, but if
>you run 'kconfig' (or whatever SCO calls the kernel configurer program)
>there should be an option to add facilities to the kernel, when you enter
>that submenu one of the facilites you can add is the debugger. Then rebuild
>a kernel and presto you have the debugger, you can drop into it at any
>particular point by hitting <CTRL> <ALT> d, then enter the command:
>sysdump. If SCO doesn't include this facility you should scream loudly :-}.
>
>>Is there some undocumented way to
>>modify things with `crash'?
>
>NO. You could use adb on the running system but then 3.2 doesn't have
>adb, oh well...
>
>Disclaimer: I'm paid to fix bugs, not to speak for the company!
>
>
>-- 
>Jack F. Vogel			jackv@locus.com
>AIX370 Technical Support	       - or -
>Locus Computing Corp.		jackv@turnkey.TCC.COM

The kernel debugger for AT&T (as far as I know) is not available
for the general public.  (I would assume a source license gets it,
but that type of stuff is out of my realm.)  If you did have it
though, you get into the same way as above.  (There is also a
call you can put into a program.  This is convenient when you are
running on an alternate console and don't have the keyboard to do
a ctrl-alt-d.)

The debugger gives you basically the same abilities as crash, though
in a very different syntax (I don't know crash's syntax).

Dave Connet
dcon@iwtng.att.com