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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.
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