Re: [PATCH 5/6] Begin abstraction of sensitive instructions: asm files

[Jeremy Fitzhardinge <jeremy@goop.org>]

Andi Kleen wrote:
> I would rather pass the register to the macro? If you start to
> clobber registers you would need to pass in the tmp registers
> too I guess.
The intent is that these code sequences can be patched in place, so they 
need to have a specific abi at the machine-code level.  Some of the 
operations whose Xen implementation clobbers a register have that in 
their definition, on the assumption that 1 temp is enough, and that 
another interface which needs more can organize save/restoring registers 
for itself.

    J