Saving to 32 bits of GPRs in signal context

[Dan Malek]

On May 29, 2007, at 3:24 AM, Benjamin Herrenschmidt wrote:

> Hi Folks !
>
> I've been looking at saving & restoring the top 32 bits of 64 bits
> registers when delivering signals to 32 bits processes on a 64 bits
> kernel. The principle is easy, but I wonder where to stick them.

I'm wondering why you need to do this at all?
Why would a 32-bit application care about or
know what to do with these?

Thanks.

	-- Dan