Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!bnrgate!bnr!crk45.bnr.ca!doray
From: doray@crk45.bnr.ca (Bernard Doray 1632686)
Newsgroups: comp.sys.apollo
Subject: Memory Protection on the Apollo
Keywords: apollo memory protection read-only write-protect
Message-ID: <720@crk56.bnr.ca>
Date: 10 Jan 90 16:24:16 GMT
Sender: janick@bnr.CA
Reply-To: doray@crk45.bnr.ca (Bernard Doray 1632686)
Organization: bnr
Lines: 16


Is there an easy way to make a page in memory read-only under
Apollo Sr10.1?

(I want to detect if a procedure exceeds the stack space I have
allocated to it) 

the Mc68851 seems to allow that, but almost all the instructions 
for the Mc68851 are priviledged !! (not very convenient
since I want to make the program as safe as possible and easily
be able to ship it out to other nodes)

Thank you for your help.
Bernard J Doray
Bell-Northern-Research
Ottawa, CANADA