/* $OpenBSD: sigprocmask.S,v 1.5 2023/12/10 16:45:52 deraadt Exp $ */

/*
 * Copyright (c) 1996 Dale Rahn
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/* sigprocmask(int how, const sigset_t *set, sigset_t *oset); */

#include "SYS.h"

        .text
SYSENTRY_HIDDEN(sigprocmask)
        RETGUARD_SETUP(sigprocmask, %r11)
        li      %r0, SYS_sigprocmask

        stdu    %r1, -32(%r1)
        std     %r5, 16(%r1)
        
        /* check set (new mask value) for null, in which case
           fiddle arguments */
        cmpdi   %r4, 0
        bne+    .L_load_set
        addi    %r3, 0, 1       /* how = SIG_BLOCK, new mask already 0 */
        b .L_do_call
.L_load_set:
        lwz     %r4, 0(%r4)     /* get new mask */
.L_do_call:
        
99:     sc
        PINSYSCALL(SYS_sigprocmask, 99b)
        
        /* didnt work? */
        cmpwi   %r0, 0
        beq+    .L_sigprocmask_ok
        stw     %r0, R13_OFFSET_ERRNO(%r13)
        li      %r3, -1
        b       .L_end

.L_sigprocmask_ok:
        ld      %r5, 16(%r1)
        cmpdi   %r5, 0
        beq+    .L_sigprocmask_done
        stw     %r3, 0(%r5)
.L_sigprocmask_done:
        li      %r3, 0
        addi    %r1, %r1, 32
.L_end:
        RETGUARD_CHECK(sigprocmask, %r11)
        blr
SYSCALL_END_HIDDEN(sigprocmask)