1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#include "SYS.h" 38 39#if defined(SYSLIBC_SCCS) 40 .text 41 .asciz "$OpenBSD: sigprocmask.S,v 1.4 1998/11/20 11:18:30 d Exp $" 42#endif /* SYSLIBC_SCCS */ 43 44SYSENTRY(sigprocmask) 45 movl 8(%esp),%ecx # fetch new sigset pointer 46 testl %ecx,%ecx # check new sigset pointer 47 jnz 1f # if not null, indirect 48/* movl $0,8(%esp) # null mask pointer: block empty set */ 49 movl $1,4(%esp) # SIG_BLOCK 50 jmp 2f 511: movl (%ecx),%ecx # fetch indirect ... 52 movl %ecx,8(%esp) # to new mask arg 532: movl $(SYS_sigprocmask),%eax 54 int $0x80 55 jc err 56 movl 12(%esp),%ecx # fetch old mask requested 57 testl %ecx,%ecx # test if old mask requested 58 jz out 59 movl %eax,(%ecx) # store old mask 60out: 61 xorl %eax,%eax 62 ret 63err: 64#ifdef PIC 65 jmp PIC_PLT(cerror) 66#else 67 jmp cerror 68#endif 69