From owner-freebsd-hackers  Wed Nov 29 00:28:21 1995
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.6.12/8.6.6) id AAA20683
          for hackers-outgoing; Wed, 29 Nov 1995 00:28:21 -0800
Received: from cls.net (freeside.cls.de [192.129.50.1])
          by freefall.freebsd.org (8.6.12/8.6.6) with SMTP id AAA20660
          for <hackers@freebsd.org>; Wed, 29 Nov 1995 00:28:18 -0800
Received: by mail.cls.net (Smail3.1.29.1)
	  from allegro.lemis.de (192.109.197.134) with smtp
	  id <m0tKhs2-0011jSC@cls.net>; Wed, 29 Nov 95 08:28 GMT
From: grog@lemis.de (Greg Lehey)
Organisation: LEMIS, Schellnhausen 2, 36325 Feldatal, Germany
Phone: +49-6637-919123
Fax:   +49-6637-919122
Reply-To: grog@lemis.de (Greg Lehey)
Received: (grog@localhost) by allegro.lemis.de (8.6.9/8.6.9) 
	id JAA16566 for hackers@freebsd.org; Wed, 29 Nov 1995 09:17:06 +0100
Message-Id: <199511290817.JAA16566@allegro.lemis.de>
Subject: Re: Documentation..
To: julian@ref.tfs.com (Julian Elischer)
Date: Wed, 29 Nov 1995 09:16:27 +0100 (MET)
In-Reply-To: <199511282246.OAA24442@ref.tfs.com> from "Julian Elischer" at Nov 28, 95 02:46:57 pm
X-Mailer: ELM [version 2.4 PL23]
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Content-Length: 1156      
Sender: owner-hackers@FreeBSD.ORG
Precedence: bulk

Julian Elischer writes:
> 
>> 
>>> Jordan K. Hubbard writes:
>>> > 
>>> > > locking as the result of the change of struct flock.  The binary I had
>>> > > (elm) was compiled on BSD/386 1.1, and it didn't run on BSD/OS 2.0
>>> > > either.
>>> > 
>>> > Now try compiling elm on BSD/OS 2.0 and running that under FreeBSD.  That
>>> > was what was referred to.
>>> 
>>> Aha.  How about that--it SIGSEGVs out of start.  Is this known behaviour?
>>> 
>>> Greg
>> 
>> Uh.  Greg, you really should read your mail more thoroughly.  This is
>> the issue you've been discussing WRT "BSDI compatibility" the whole
>> time.. :-)
>> 
>> 					Jordan
>> 
> It'd be interesting to see what they were trying to achieve....
> anyone know WHY it SEGV's?
> what does ktrace say?
> gdb?

gdb's the right tool.  It's blowing up trying to set up a pointer to
the environs, which BSDI keeps above the stack.  FreeBSD doesn't have
anything there, so it picks up a NULL pointer and bombs out.

Any ideas about what the right way to handle this is?  I have a number
of pages of documentation (in ?roff or PostScript) which explain
what's going on here, if anybody wants them.

Greg