[PATCH] x86-64: invalidate sysenter

H. J. Lu hjl@lucon.org
Wed May 11 23:01:00 GMT 2005


On Fri, May 06, 2005 at 06:15:00PM +0200, Jan Beulich wrote:
> >> >sysenter is supported on EM64T. Don't apply it.
> >> 
> >> It can't (in 64-bit more) because it doesn't add new MSRs to support that...
> >> 
> >
> >It is documented in EM64T manual. Are you saying the manual is
> >wrong?
> 
> I suppose so (there are very many inconsistencies in these manuals).
> 

I checked with our people. sysenter is valid instruction in 64bit
mode on EM64T although today's Linux doesn't support it for system
calls.

Please don't apply the patch.


H.J.



More information about the Binutils mailing list