Re: [Xen-devel] [PATCH 1/4] arm: clobber only argument registers

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 25 Jul 2012, Ian Campbell wrote:
> Previously it was declared that r1..r4 would all be clobbered by all
> hypercalls. Instead declare that only actually used hypercall argument
> registers are clobbered. This is more inline with generally expected
> conventions and allows for more optimal code in the caller in some cases.
> 
> This is an ABI change, although an older guest which expects more things to be
> clobbered than we do now won't be adversely impacted.
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>


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