On 7/25/25 10:55 AM, Peter Maydell wrote:
FEAT_SME adds the TPIDR2 userspace-accessible system register, which is used as part of the procedure calling standard's lazy saving scheme for the ZA registers: https://github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst#66the-za-lazy-saving-schemeThe Linux kernel has a signal frame record for saving and restoring this value when calling signal handlers, but we forgot to implement this. The result is that code which tries to unwind an exception out of a signal handler will not work correctly. Add support for the missing record. Cc: qemu-sta...@nongnu.org Fixes: 78011586b90d1 ("target/arm: Enable SME for user-only") Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- linux-user/aarch64/signal.c | 42 +++++++++++++++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-)
Reviewed-by: Pierrick Bouvier <pierrick.bouv...@linaro.org>
