Re: Use of r31 on the powerpc/booke:mpc85xx architecture

On Sep 7, 2012, at 9:59 AM, Scislowicz, Adam wrote:

> My mistake, the last set of listed registers is in this case a list of registers implicitly clobbered by the inline assembly. If I understand correctly this pmap_copy_page() function is incompatible with preservation of the frame pointer. Perhaps falling back on a non-optimized pmap_copy_page() when DDB is enabled is the right course of action excepting an alternative optimized implementation which preserves r31.

I've tweaked pmap_copy_page so that gcc is not aware of the use of r31.