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Syscall arguments are abi_long in user code, and plugin syscall interface works with uint64_t only. According to C integer promotion rules, the value is sign extended before becoming unsigned, thus setting high bits when only 32-bit lower ones should have a significant value. As a result, we need to clamp values we receive from user-code accordingly. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Link: https://lore.kernel.org/qemu-devel/20260305-setpc-v5-v7-1-4c3adba52403@epfl.ch Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>