/*      $OpenBSD: brk.S,v 1.18 2016/05/30 05:18:52 guenther Exp $       */

/*
 * Copyright (c) 1999 Michael Shalayeff
 * 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 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 OR HIS RELATIVES 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 MIND, 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 "SYS.h"

        .import __curbrk, data
        .import _end, data

        .data
        .export __minbrk, data
__minbrk
        .long   _end

        .weak   brk

LEAF_ENTRY(brk)
#ifdef __PIC__
        addil   LT%__minbrk, r19
        ldw     RT%__minbrk(r1), t1
        ldw     0(t1), t2
#else
        ldil    L%__minbrk, t1
        ldw     R%__minbrk(t1), t2
#endif
        sub,<<  t2, arg0, r0
        copy    t2, arg0
        stw     arg0, HPPA_FRAME_ARG(0)(sp)

        SYSCALL(break)

        ldw     HPPA_FRAME_ARG(0)(sp), arg0
#ifdef __PIC__
        addil   LT%__curbrk, r19
        ldw     RT%__curbrk(r1), t1
        bv      r0(rp)
        stw     arg0, 0(t1)
#else
        ldil    L%__curbrk, t1
        bv      r0(rp)
        stw     arg0, R%__curbrk(t1)
#endif
EXIT(brk)

        .end