From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ronald G Minnich <rminnich@lanl.gov>
To: <9fans@cse.psu.edu>
Subject: Re: [9fans] Virtual memory & paging
In-Reply-To: <3.0.6.32.20020204092636.0099aee0@pop3.clear.net.nz>
Message-ID: <Pine.LNX.4.33.0202040911340.3428-100000@snaresland.acl.lanl.gov>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Date: Mon,  4 Feb 2002 09:15:18 -0700
Topicbox-Message-UUID: 4b49c0b4-eaca-11e9-9e20-41e7f4b1d025

On Mon, 4 Feb 2002, Andrew Simmons wrote:

> Thanks for that - it was a dumb question.

actually not a dumb question I think. There have been supercomputers with
no VM hardware that were built, and the OS on these remapped (relinked)
executables at program load time, so as to avoid the overhead that you get
with VM (basically a bunch of logic in the address path). So in essence
the start address in your code and the address of your data would be
unique for each execution of your program.

Some of the more fancy ones wrapped base and bounds registers around each
program, and that was as far as protection went.

ron