On Tue, Oct 30, 2001 at 11:04:34AM +0000, Ben Harris wrote:

 > In article <20011029215305.A11913@spathi.chuq.com> you write:
 > >but I really don't think we should allow unpriviledged users
 > >to cause any file they can read to become read-only just by
 > >mapping it with PROT_EXEC.  the VTEXT flag was originally used
 > >just for the read-only part, I was overloading it when I used it
 > >for affecting paging behaviour.
 > 
 > Hmm.  What's the reasoning behind protecting executables against being
 > overwritten, and why doesn't it apply to shared libraries as well?

Yah, I'm a little fuzzy on this, too.  If the idea is that you don't
want the underlying file changing while you deamand-page from it, then
that applies to shared libraries, too.

-- 
        -- Jason R. Thorpe <thorpej@wasabisystems.com>