1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8#if defined(SYSLIBC_SCCS) && !defined(lint) 9 .asciz "@(#)sigprocmask.s 8.1 (Berkeley) 06/04/93" 10#endif /* SYSLIBC_SCCS and not lint */ 11 12#include "SYS.h" 13 14err: 15 jmp cerror 16 17ENTRY(sigprocmask) 18 tstl 8(ap) # check new sigset pointer 19 bneq 1f # if not null, indirect 20/* movl $0,8(ap) # null mask pointer: block empty set */ 21 movl $1,4(ap) # SIG_BLOCK 22 jbr 2f 231: movl *8(ap),8(ap) # indirect to new mask arg 242: chmk $SYS_sigprocmask 25 jcs err 26 tstl 12(ap) # test if old mask requested 27 beql out 28 movl r0,*12(ap) # store old mask 29out: 30 clrl r0 31 ret 32