Re: [PATCH v2 for-10.1 3/3] linux-user/aarch64: Support ZT_MAGIC signal frame record

[Richard Henderson <richard.henderson@linaro.org>]

On 7/25/25 07:55, Peter Maydell wrote:
> FEAT_SME2 adds the ZT0 register, whose contents may need to be
> preserved and restored on signal handler entry and exit.  This is
> done with a new ZT_MAGIC record.  We forgot to implement support for
> this in our linux-user code before enabling the SME2p1 emulation,
> which meant that a signal handler using SME would corrupt the ZT0
> register value, and code that attempted to unwind an exception from
> inside a signal handler would not work.
> 
> Add the missing record handling.
> 
> Fixes: 7b1613a1020d2942 ("target/arm: Enable FEAT_SME2p1 on -cpu max")
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
>   linux-user/aarch64/signal.c | 93 ++++++++++++++++++++++++++++++++++++-
>   1 file changed, 92 insertions(+), 1 deletion(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~