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From: kunkee@ficc.ferranti.com (randy kunkee)
Newsgroups: comp.unix.internals,comp.unix.xenix.misc,comp.sys.intel
Subject: How to access U area from proc table
Message-ID: <8D-B4F1@xds13.ferranti.com>
Date: 14 Jun 91 18:42:31 GMT
Reply-To: kunkee@ficc.ferranti.com (randy kunkee)
Organization: Ferranti International Controls Corporation
Lines: 21

I have Intel Xenix 3.5, which is basically a modified system III kernal
running on 80286 mode.

I'm trying to write a program which will allow me to access the u area
for every process running on the system, but there seems to be some
magic going on.

I expected the ADDR field of ps -l to point directly to the U area, but
it does not.  Apparently it points to a 7 to 9 byte structure which
then points to the U area.  This is small structure is what is referenced
by proc.p_caddr.

Can anybody tell me how to convert this into the actual address of the
U area?  Then, can you tell me how to convert that into an offset in
/dev/mem?
-- 
Randy Kunkee
Ferranti International Controls Corporation
12808 W. Airport Blvd.  Sugar Land, TX 77478
UUCP: uupsi!ficc!kunkee       ph: (713) 274-5132
INTERNET: kunkee@ficc.ferranti.com