On Mon, Nov 30, 2020 at 10:56 PM Niels Möller <[email protected]> wrote:

> Hmm. I agree just lowering the stack pointer sounds a bit questionable.
> But if we use some other register to point into the protected zone, we
> should be fine? E.g.,
>
>         addi    r10, r1, -0x40 C Save callee-save registers
>         stvx    v20, 0, r10
>         stvx    v21, r6, r10
>         stvx    v22, r7, r10
>         stvx    v23, r8, r10
>

This is totally fine.

regards,
Mamone
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