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bsd-user/signal.c: Add si_type argument to queue_signal
Mirror the linux-user practice and add a si_type argument to queue signal. This will be transported as the upper 8 bits in the si_type element of siginfo so that we know what bits of the structure are valid and so we can properly implement host_to_target_siginfo_noswap and tswap_siginfo. Adapt the one caller of queue_signal to the new interface. Use all the same names as Linux (except _RT which we don't treat differently, unlike Linux), though some are unused. Place this into signal-common.h since that's a better place given bsd-user's structure. Move prototype of queue_signal to signal-common.h to mirror linux-user's location. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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