/*      $NetBSD: brk.S,v 1.9 2020/05/10 14:34:31 skrll Exp $    */

/*      $OpenBSD: brk.S,v 1.7 2001/06/04 23:14:04 mickey 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"

#if defined(LIBC_SCCS) && !defined(lint)
        RCSID("$NetBSD: brk.S,v 1.9 2020/05/10 14:34:31 skrll Exp $")
#endif /* LIBC_SCCS and not lint */

        .import __curbrk, data
        .hidden __curbrk
        .global _end

#ifdef WEAK_ALIAS
        WEAK_ALIAS(brk, _brk)
#endif

        .data
        .export __minbrk, data
        .hidden __minbrk
__minbrk:
        .long   _end

ENTRY(_brk,0)
#ifdef __PIC__
        addil   LT%__minbrk, %r19
        ldw     RT%__minbrk(%r1), %r1
        ldw     0(%r1), %t2
#else  /* !__PIC__ */
        ldil    L%__minbrk, %t1
        ldw     R%__minbrk(%t1), %t2
#endif /* !__PIC__ */
        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), %r1
        bv      %r0(%rp)
         stw    %arg0, 0(%r1)
#else  /* !__PIC__ */
        ldil    L%__curbrk, %t1
        bv      %r0(%rp)
         stw    %arg0, R%__curbrk(%t1)
#endif /* !__PIC__ */
EXIT(brk)

        .end