/*      $OpenBSD: _setjmp.S,v 1.6 2022/12/24 10:49:19 kettenis Exp $    */
/*-
 * Copyright (c) 2014 Andrew Turner
 * Copyright (c) 2014 The FreeBSD Foundation
 * All rights reserved.
 *
 * Portions of this software were developed by Andrew Turner
 * under sponsorship from the FreeBSD Foundation
 *
 * 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 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 AUTHOR 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.
 *
 */

#include "DEFS.h"
#include <machine/setjmp.h>

ENTRY(_setjmp)
        RETGUARD_SETUP(_setjmp, x15)
        /* Store the magic value and stack pointer */
        movz    x8, #(_JB_MAGIC__SETJMP & 0xffff)
        movk    x8, #(_JB_MAGIC__SETJMP >> 16), lsl #16
        mov     x9, sp
        stp     x8, x9, [x0], #16

        /* Store the general purpose registers and lr */
        stp     x19, x20, [x0], #16
        stp     x21, x22, [x0], #16
        stp     x23, x24, [x0], #16
        stp     x25, x26, [x0], #16
        stp     x27, x28, [x0], #16
        stp     x29, x30, [x0], #16

#ifndef _STANDALONE
        /* Store the vfp registers */
        stp     d8, d9, [x0], #16
        stp     d10, d11, [x0], #16
        stp     d12, d13, [x0], #16
        stp     d14, d15, [x0], #16
        mrs     x1, fpcr
        str     x1, [x0]
#endif

        /* Return value */
        mov     x0, #0
        RETGUARD_CHECK(_setjmp, x15)
        ret
END_STRONG(_setjmp)

ENTRY(_longjmp)
        RETGUARD_SYMBOL(_longjmp)
        RETGUARD_LOAD_RANDOM(_longjmp, x15)
        /* Check the magic value */
        ldr     x8, [x0], #8
        movz    x9, #(_JB_MAGIC__SETJMP & 0xffff)
        movk    x9, #(_JB_MAGIC__SETJMP >> 16), lsl #16
        cmp     x8, x9
        b.ne    .Lbotch

        /* Restore the stack pointer */
        ldr     x8, [x0], #8
        mov     sp, x8

        /* Restore the general purpose registers and lr */
        ldp     x19, x20, [x0], #16
        ldp     x21, x22, [x0], #16
        ldp     x23, x24, [x0], #16
        ldp     x25, x26, [x0], #16
        ldp     x27, x28, [x0], #16
        ldp     x29, x30, [x0], #16
        RETGUARD_CALC_COOKIE(x15)

#ifndef _STANDALONE
        /* Restore the vfp registers */
        ldp     d8, d9, [x0], #16
        ldp     d10, d11, [x0], #16
        ldp     d12, d13, [x0], #16
        ldp     d14, d15, [x0], #16
        ldr     x2, [x0]
        msr     fpcr, x2
#endif

        /* Load the return value */
        cmp     w1, #0
        csinc   w0, w1, wzr, ne
        RETGUARD_CHECK(_longjmp, x15)
        ret

.Lbotch:
        bl      _HIDDEN(abort)
END_STRONG(_longjmp)