Date: Sun, 22 Jun 1997 12:04:38 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: Nate Eldredge <eldredge AT ap DOT net>
cc: djgpp AT delorie DOT com
Subject: Re: Possible misbehavior of write
In-Reply-To: <199706192159.OAA27333@adit.ap.net>
Message-ID: <Pine.SUN.3.91.970622120409.4249A-100000@is>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Precedence: bulk


On Thu, 19 Jun 1997, Nate Eldredge wrote:

> Egad! I had a look at the sources and it seems it would require changing
> alomst every function that takes a pointer argument. Plus, is it to check
> just for NULL's, or decide whether it's a valid address some other way?

You could check if the pointer is in the first page, like so:

	if (! (ptr & ~4095) )
	   errno = EFAULT;

since the CWSDPMI's null pointer detection actually tests for this
also.