[PATCH 3/3] arm: smh: Allow semihosting trap calls to be inlined

[Tom Rini]

On Wed, Oct 05, 2022 at 05:38:49PM +0100, Andre Przywara wrote:

> Currently our semihosting trap function is somewhat fragile: we rely
> on the current compiler behaviour to assign the second inline assembly
> argument to the next free register (r1/x1), which happens to be the
> "addr" argument to the smh_trap() function (per the calling convention).
> I guess this is also the reason for the noinline attribute.
> 
> Make it explicit what we want: the "addr" argument needs to go into r1,
> so we add another register variable. This allows to drop the "noinline"
> attribute, so now the compiler beautifully inlines just the trap
> instruction directly into the calling function.
> 
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>

Applied to u-boot/master, thanks!

-- 
Tom
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