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Article View: comp.sys.amiga.tech
Article #4848

Re: Memory Protection!

#4848
From: Christopher A. Wichura
Date: Sun, 12 Aug 1990 10:15
26 lines
1882 bytes
In article <13756@cbmvax.commodore.com> valentin@cbmvax.commodore.com (Valentin Pepelea) writes:
>Another problem is that even if you provide the possiblity for new applications
>to run protected within the environment, the fact that older programs cann still
>jog around the address space and wreak havoc, defeats the initial purpose.
>Either you provide memory protection to everybody simultaneoulsy, or you
>don't at all.

This I don't understand.  If an old program goes and stomps on memory
protected by a program using some new OS call, shouldn't an exception be
generated which the rexception handler would pick up?  Thus you get a
software failure requester and no `real' harm is done.  Given that if the
memory wasn't protected you could easily end up with the stomped on program
getting very confused and crashing the system, I would rather have the
software failure requester...

-=> CAW

/////////////////////////////////////\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                          Christopher A. Wichura

               caw@miroc.chi.il.us      (my amiga)         
               u12401@uicvm.uic.edu     (my school account)

Please! Do not send mail to my school account unless mail to miroc bounces.
    I often do not check uicvm.uic.edu for periods in excess of a week.
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\//////////////////////////////////////
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!cs.utexas.edu!swrinde!ucsd!pacbell.com!pacbell!att!mcdchg!laidbak!obdient!igloo!miroc!caw
References: <1145.26bd4989@waikato.ac.nz> <13693@cbmvax.commodore.com> <hclausen.2309@adspdk.CBMNET> <13756@cbmvax.commodore.com>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!cs.utexas.edu!swrinde!ucsd!pacbell.com!pacbell!att!mcdchg!laidbak!obdient!igloo!miroc!caw
From: caw@miroc.Chi.IL.US (Christopher A. Wichura)
Newsgroups: comp.sys.amiga.tech
Subject: Re:  Memory Protection!
Message-ID: <caw.2371@miroc.Chi.IL.US>
Date: 12 Aug 90 10:15:59 GMT
References: <1145.26bd4989@waikato.ac.nz> <13693@cbmvax.commodore.com> <hclausen.2309@adspdk.CBMNET> <13756@cbmvax.commodore.com>
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