Path: utzoo!attcan!uunet!dino!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!aglew
From: aglew@oberon.crhc.uiuc.edu (Andy Glew)
Newsgroups: comp.arch
Subject: 68K stack puke (Was: Re: GC triggering and stack limit checking by MMU hardware)
Message-ID: <AGLEW.90Jul23143014@oberon.crhc.uiuc.edu>
Date: 23 Jul 90 19:30:14 GMT
References: <1990Jul19.151524.22544@diku.dk> <11075@alice.UUCP>
	<3729@auspex.auspex.com>
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In-Reply-To: guy@auspex.auspex.com's message of 23 Jul 90 17:49:31 GMT

I once was surprised to find a kernel developer tell me that the key
to portable 68K UNIX systems was only to rely on the contents of the
stack puke for determining, eg.  what page had faulted, etc., never to
rely on MMU registers.

Of course, he was an inside-Motorola kernel developer.
Outside-Motorola developers tended to trust whatever MMU their
hardware had, because they could never get full docs on the stack
puke.

--
Andy Glew, andy-glew@uiuc.edu

Propaganda:
    
    UIUC runs the "ph" nameserver in conjunction with email. You can
    reach me at many reasonable combinations of my name and nicknames,
    including:

    	andrew-forsyth-glew@uiuc.edu
    	andy-glew@uiuc.edu
    	sticky-glue@uiuc.edu

    and a few others. "ph" is a very nice thing which more USEnet
    sites should use. There is an info-ph mailing list, or, contact
    Steve-Dorner@uiuc.edu.