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9097087147
The syscall emulation code previously wasn't interruptible via cpu_loop_exit(), as this construct relies on a longjmp target that is not live anymore in the syscall handling code. Consequently, longjmp() would operate on a (potentially overwritten) stale jump buffer. This patch adds an additional setjmp and the necessary handling around it to make longjmp() (and by proxy cpu_loop_exit() safe to call even within a syscall context. Reviewed-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Florian Hofhammer <florian.hofhammer@epfl.ch> Link: https://lore.kernel.org/qemu-devel/20260305-setpc-v5-v7-3-4c3adba52403@epfl.ch Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>