(* OpenBSD 5.9 /usr/include/sys/siginfo.h *)
				si_signo*: int; (* signal from signal.h *)
				si_code*: int; (* code from above *)
				si_errno*: int; (* error from errno.h *)
				_data*: RECORD [union]
					_pad*: ARRAY [untagged] 29 (* SI_PAD *) OF int; (* for future growth *)
					_proc*: RECORD [untagged] (* kill(), SIGCLD, siqqueue() *)
						_pid*: pid_t; (* process ID *)
						_pdata*: RECORD [union]
							_kill*: RECORD [untagged]
								_uid*: uid_t;
(*
								_value*: sigval;
*)
								_value*: int
							END;
							_cld*: RECORD [untagged]
								_utime*: clock_t;
								_stime*: clock_t;
								_status*: int;
							END;
						END;
					END;
					_fault*: RECORD [untagged] (* SIGSEGV, SIGBUS, SIGILL and SIGFPE *)
						_addr*: PtrVoid; (* faulting address *)
						_trapno*: int; (* illegal trap number *)
					END;
				END;