On 02/07/2010 10:54 PM, Pavel Machek 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.
-hpa
