/* $OpenBSD: sigsuspend.S,v 1.8 2023/12/10 16:45:51 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.
 */

/* int sigsuspend(int *mask) */

#include "SYS.h"

        .text
SYSENTRY_HIDDEN(sigsuspend)
        RETGUARD_SETUP(sigsuspend, %r11, %r12)
        li      %r0, SYS_sigsuspend

        lwz     %r3, 0(%r3)             /* load the mask */
99:     sc
        PINSYSCALL(SYS_sigsuspend, 99b)

        cmpwi   %r0, 0
        beq+    .L_ret
        stw     %r0, R2_OFFSET_ERRNO(2)
        li      %r3, -1
.L_ret:
        RETGUARD_CHECK(sigsuspend, %r11, %r12)
        blr
SYSCALL_END_HIDDEN(sigsuspend)