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Mail Archives: cygwin/1997/11/07/19:32:41

From: anon AT anon DOT efga DOT org (Anonymous)
Subject: WARNING: Serious Pentium Bug
7 Nov 1997 19:32:41 -0800 :
Message-ID: <bd419e7c1b91fab7972ea9db074f7676.cygnus.gnu-win32@anon.efga.org>
To: gnu-win32 AT cygnus DOT com

There is a SERIOUS bug in all pentium CPUs. The following 
code will crash any machine running on a pentium CPU, MMX or no 
MMX, any speed, regardless of OS (crash as in instant seize, hard 
reboot the only cure):

char x [5] = { 0xf0, 0x0f, 0xc7, 0xc8 };

main ()
{
       void (*f)() = x;
       f();
}

This require no special permissions to run, it works fine with
average-joe-userspace permissions. I have verified this, it works.
Demand a new CPU from Intel.


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