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Date: Fri, 14 Mar 2003 13:56:10 -0500 (EST)
From: "Richard B. Johnson" <root@chaos.analogic.com>
Reply-To: root@chaos.analogic.com
To: Olaf Titz <olaf@bigred.inka.de>
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Subject: Re: 2.5.63 accesses below %esp (was: Re: ntfs OOPS (2.5.63))
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On Fri, 14 Mar 2003, Olaf Titz wrote:

> > code is designed to be easily decoded forward, noone executes code going
> > backwards. Finding out what starts at EIP is easy.
> 
> I remember reading once in a magazine that there exists an
> undocumented/illegal instruction in the x86 which causes the IP to run
> backwards, similar to setting the D flag.
> 
> Was an April 1st issue though ;-)
> 
> Olaf

There was a whole operating system written upon this principle.
I think it was called "retrograde", erm, "Redmond", yes, that's
what it was, something out of Redmond, Washington, ASU ^M^M^M USA


Cheers,
Dick Johnson
Penguin : Linux version 2.4.20 on an i686 machine (797.90 BogoMips).
Why is the government concerned about the lunatic fringe? Think about it.


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