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Date:      Tue, 22 Oct 96 22:14:59 MDT
From:      johnson@charming.nrtc.northrop.com
To:        questions@freebsd.org
Subject:   Virtual memory question:  map first page?
Message-ID:  <9610230515.AA02752@charming.nrtc.northrop.com>

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I noticed that in imgact_aout.c the text segment gets mapped starting at
linear address 4096.

Is it possible to map the first page of linear memory?  What I would like
to be able to do is set up a process in which linear addresses starting
at 0 are mapped.

When I modified imgact_aout.c to map the first linear page of memory as
an experiment, and then ran a specially cooked executable to exercise that
code, the machine immediately hung.

Is there something special on the first linear page of a user process?

Thanks,

Greg Johnson
johnson@nrtc.northrop.com



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