[Xen-devel] Re: [PATCH 3 of 7] x86: fix paravirt clobber in entry_64.S

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Rusty Russell wrote:
> On Thursday 29 January 2009 09:05:03 Jeremy Fitzhardinge wrote:
>   
> > The clobber is trying to say that anything except RDI is available for
> > clobbering, but actually clobbers everything.  This hasn't mattered
> > because the clobbers were basically ignored, but subsequent patches
> > will rely on them.
> >
> > Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
> >     
> Acked-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
>
> Hmm, did we never have the deliberate-clobbering debug code for 64 bit?
>   
No.  I think I killed it off before 64-bit was even started.  There was 
some confusion about whether the return regs were considered to be 
"clobbered" or not, but I don't remember the details.
   J

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