From: iverson@cisco.com (Tim Iverson) Subject: Re: WARNING: Serious Pentium Bug 7 Nov 1997 21:08:52 -0800 Message-ID: <199711080455.UAA21222.cygnus.gnu-win32@stars.cisco.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: gnu-win32@cygnus.com Just to keep everyone from getting too scared, this really would only matter for secure sites with multiple users -- that particular sequence is a nonsense instruction. The only folks using it would be those deliberately wanting to bring the system down. Here it is decoded: lock cmpxchg8b eax BTW, I haven't tested it, so I don't know if this is even true. It should generate an illegal instruction exception, since the operand needs to be a memory reference. - Tim Iverson iverson@lionheart-com +---------------- | Date: Fri, 7 Nov 1997 21:54:23 -0500 | From: Anonymous | Subject: WARNING: Serious Pentium Bug | To: gnu-win32@cygnus.com | | code will crash any machine running on a pentium CPU, MMX or no | char x [5] = { 0xf0, 0x0f, 0xc7, 0xc8 }; .... | This require no special permissions to run, it works fine with | average-joe-userspace permissions. I have verified this, it works. - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request@cygnus.com" with one line of text: "help".