/*      $NetBSD: compat_setjmp.S,v 1.3 2006/01/05 19:21:37 uwe Exp $    */

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 *
 *      from: @(#)setjmp.s      5.1 (Berkeley) 4/23/90
 */

#include <machine/asm.h>
#include <machine/setjmp.h>

#if defined(LIBC_SCCS)
        RCSID("$NetBSD: compat_setjmp.S,v 1.3 2006/01/05 19:21:37 uwe Exp $")
#endif

/*
 * C library -- setjmp, longjmp
 *
 *      longjmp(a,v)
 * will generate a "return(v)" from the last call to
 *      setjmp(a)
 * by restoring registers from the stack.
 * The previous signal state is restored.
 */

ENTRY(setjmp)
        PIC_PROLOGUE(.L_got_1)
        sts.l   pr, @-sp
        mov.l   r4, @-sp

        mov.l   .L_sigblock, r0
1:      CALL    r0                      /* int mask = sigblock(0); */
         mov    #0, r4

        mov.l   @sp+, r4
        lds.l   @sp+, pr
        PIC_EPILOGUE

        /* identical to _setjmp except that mask is present */
        add     #((_JB_SIGMASK + 1) * 4), r4
        mov.l   r0, @-r4                /* current mask returned by sigblock */
        mov     #1, r0
        mov.l   r0, @-r4                /* has signal mask */
        mov.l   r15, @-r4
        mov.l   r14, @-r4
        mov.l   r13, @-r4
        mov.l   r12, @-r4
        mov.l   r11, @-r4
        mov.l   r10, @-r4
        mov.l   r9, @-r4
        mov.l   r8, @-r4
        sts.l   pr, @-r4
        rts
         xor    r0, r0

        .align  2
.L_got_1:       PIC_GOT_DATUM
.L_sigblock:    CALL_DATUM(_C_LABEL(sigblock), 1b)
        SET_ENTRY_SIZE(setjmp)


ENTRY(longjmp)
        /* we won't return here, so we don't need to save pr and r12 */
        PIC_PROLOGUE_NOSAVE(.L_got_2)
        mov.l   r5, @-sp
        mov.l   r4, @-sp

        mov.l   .L_sigsetmask, r0
1:      CALL    r0                      /* sigsetmask(saved mask) */
         mov.l  @(_JB_SIGMASK * 4, r4), r4

        mov.l   @sp+, r4
        mov.l   @sp+, r5

        /* identical to _longjmp */
        lds.l   @r4+, pr
        mov.l   @r4+, r8
        mov.l   @r4+, r9
        mov.l   @r4+, r10
        mov.l   @r4+, r11
        mov.l   @r4+, r12
        mov.l   @r4+, r13
        mov.l   @r4+, r14
        mov.l   @r4+, r15

        mov     r5, r0
        tst     r0, r0  /* make sure return value is non-zero */
        bf      .L0
        add     #1, r0
.L0:
        rts
         nop

        .align  2
.L_got_2:       PIC_GOT_DATUM
.L_sigsetmask:  CALL_DATUM(_C_LABEL(sigsetmask), 1b)
        SET_ENTRY_SIZE(longjmp)