Re: [PATCH 2/4] ARM: Fix register constraints in run_in_exception_handler()

[Julien Grall <julien@xxxxxxx>]

On 10/02/2025 09:21, Oleksii Kurochko wrote:
> On 2/8/25 1:02 AM, Andrew Cooper wrote:
> > Right now, run_in_exception_handler() takes an input in an arbitrary register,
> > and clobbers BUG_FN_REG.  This causes the compiler to calculate fn in the
> > wrong regsiter.
> Probably, we should give a chance for the patch which suggests to use 
> GENERIC_BUG_FRAME:
>    https://lore.kernel.org/xen- 
> devel/8fdb98350ae4fc6029738d0aabe13a57e1945a50.1680086655.git.oleksii.kurochko@xxxxxxxxx/
That would be the ideal if someone has time for it. Otherwise, patch #3 
needs to be modified (see my answer on patch #2).
But I would also be ok with this as a stop-gap for the time being.

Cheers,

--
Julien Grall