1/* $OpenBSD: sigprocmask.S,v 1.14 2020/11/28 19:49:30 gkoehler Exp $ */ 2 3/* 4 * Copyright (c) 1996 Dale Rahn 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28/* sigprocmask(int how, const sigset_t *set, sigset_t *oset); */ 29 30#include "SYS.h" 31 32 .text 33SYSENTRY_HIDDEN(sigprocmask) 34 RETGUARD_SETUP(sigprocmask, %r11, %r12) 35 stwu 1, -16(1) 36 stw 5, 12(1) 37 38 /* check set (new mask value) for null, in which case 39 fiddle arguments */ 40 cmpwi 4, 0 41 bne+ .L_load_set 42 addi 3, 0, 1 /* how = SIG_BLOCK, new mask already 0 */ 43 b .L_do_call 44.L_load_set: 45 lwz 4, 0(4) /* get new mask */ 46.L_do_call: 47 48 li 0, SYS_sigprocmask 49 sc 50 51 /* didnt work? */ 52 cmpwi 0, 0 53 beq+ .L_sigprocmask_ok 54 stw 0, R2_OFFSET_ERRNO(2) 55 li 3, -1 56 b .L_end 57 58.L_sigprocmask_ok: 59 lwz 5, 12(1) 60 cmpwi 5, 0 61 beq+ .L_sigprocmask_done 62 stw 3, 0(5) 63.L_sigprocmask_done: 64 li 3, 0 65 addi 1, 1, 16 66.L_end: 67 RETGUARD_CHECK(sigprocmask, %r11, %r12) 68 blr 69SYSCALL_END_HIDDEN(sigprocmask) 70