[TESTING]: boot2 compilation with -mregparm=3

Fabian Keil freebsd-listen at fabiankeil.de
Sun Mar 20 19:41:42 UTC 2011

Roman Divacky <rdivacky at freebsd.org> wrote:

> This patch:
>         http://lev.vlakno.cz/~rdivacky/boot2-mregparm.patch
> makes boot2 to be compiled with -mregparm=3 (which shrinks it
> some). It changes CFLAGS to include -mregparm=3 and also
> rewrites sio.S to use register passing.
> This survived my testing in qemu and jhb at s review.

Works for me on amd64 with gcc, but I don't use either
a serial console or gptboot/zfsboot.

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