8a3ae9109e
Implement support for signal handlers with the SA_RESTORER flag set. Signed-off-by: Michael Matz <matz@suse.de> [PMM: minor tweaks to make patch apply to current master] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net>