SIG_DEL           544 gc/os_dep.c    	SIG_DEL(new_mask, SIGSEGV);
SIG_DEL           545 gc/os_dep.c    	SIG_DEL(new_mask, SIGILL);
SIG_DEL           546 gc/os_dep.c    	SIG_DEL(new_mask, SIGQUIT);
SIG_DEL           548 gc/os_dep.c    	    SIG_DEL(new_mask, SIGBUS);
SIG_DEL           551 gc/os_dep.c    	    SIG_DEL(new_mask, SIGIOT);
SIG_DEL           554 gc/os_dep.c    	    SIG_DEL(new_mask, SIGEMT);
SIG_DEL           557 gc/os_dep.c    	    SIG_DEL(new_mask, SIGTRAP);