Date: Mon, 30 Aug 1999 09:43:03 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Dave Bird <dave AT xemu DOT demon DOT co DOT uk>
cc: djgpp AT delorie DOT com
Subject: Re: Error General Fault Protection on quit???
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On Sun, 29 Aug 1999, Dave Bird wrote:

>  I don't know whether it is possible to right a function which
>  tests for an invalid pointer without bombing.

How about this (UNTESTED)?

   void validate_or_die (void *ptr)
   {
     if ( (unsigned)p < 0x1000)
       abort ();
   }