On Mon, 8 Feb 2010 07:54:25 +0100 Pavel Machek <pa...@ucw.cz> wrote: > > No, it has nothing to do with ring. It has to do with modifying > > code that another CPU could be executing at the same time, and with > > modifying code on the same processor through another virtual alias > > (they are different issues.) The same issues apply regardless of > > the CPL of the processor. > > ...but these are always 'there could be cpu bugs around' issues, > right? Like amd k6. AFAICT x86 always supported self-modifying code > without any extra barriers needed...
self modifying code yes, cross modifying code no. -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org
