/*      $NetBSD: contextspfunc.S,v 1.1 2025/04/26 22:34:52 uwe Exp $    */

/*-
* Copyright (c) 2025 The NetBSD Foundation, Inc.
* All rights reserved.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 "asm.h"

RCSID("$NetBSD: contextspfunc.S,v 1.1 2025/04/26 22:34:52 uwe Exp $")


/*
* void contextspfunc()
*
*      makecontext(3) function.  Store the stack pointer on entry at
*      the global variable contextsp and call contextdone.
*/
ENTRY(contextspfunc)
       mov     sp, r1
       PIC_PROLOGUE(.L_GOT)

       MOVL_VAR(.L_contextsp, r0)
       mov.l   r1, @r0

       mov.l   .L_contextdone, r0
1:      JUMP    r0
        PIC_EPILOGUE_SLOT

       .p2align 2
L_GOT:          PIC_GOT_DATUM
L_contextsp:    VAR_DATUM(contextsp)
L_contextdone:  CALL_DATUM(contextdone, 1b)
       SET_ENTRY_SIZE(contextspfunc)