Add System V semaphore operation constants (GETVAL, SETVAL, GETALL, etc.)
and the target_sembuf and target_semun structures needed for semop(2) and
semctl(2) syscall emulation.
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>