Date: Mon, 16 Mar 1998 17:57:10 -0800 (PST)
Message-Id: <199803170157.RAA24152@adit.ap.net>
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To: sandmann AT clio DOT rice DOT edu (Charles Sandmann)
From: Nate Eldredge <eldredge AT ap DOT net>
Subject: Re: Can the text section be made read-only?
Cc: djgpp-workers AT delorie DOT com
Precedence: bulk

At 09:44  3/14/1998 -0600, Charles Sandmann wrote:
>But the problem is - mprotect and read only pages will only be supported
>under CWSDPMI and 386MAX.  I'm not even 100% sure read-only pages will
>page in/out properly under CWSDPMI.  And if it is supported, you just
>*KNOW* you will get a whole bunch more messages about page fault errors
>under DOS, so CWSDPMI must be broken since it works under Windoze ;-P
>
>Just remember - no good deed goes unpunished! :-)

Right, I figured that. :\ But I don't think there'd be significantly more
than there already are, since I bet NULL dereferences are a lot more common
than text section writes. Maybe, on a page fault, CWSDPMI should print a
message saying, "This probably wasn't caught by Windows!!" ;-)

Perhaps it could be enabled by a crt0 flag to start with?

Is there any way to check whether read-only pages will work with CWSDPMI? (I
only have r3 here so I might not be of much help.)


Nate Eldredge
eldredge AT ap DOT net