/*	$OpenBSD: sbrk.S,v 1.3 2000/03/01 17:31:21 todd Exp $	*/

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
	.data
	/*.asciz "from: @(#)sbrk.s	5.1 (Berkeley) 5/12/90"*/
	.asciz "$OpenBSD: sbrk.S,v 1.3 2000/03/01 17:31:21 todd Exp $"
	.text
#endif /* LIBC_SCCS and not lint */

#include "SYS.h"

	.globl	_end
	.globl	curbrk

	.data
	.align 8
curbrk:	.long	_end
	.text

ENTRY(sbrk)
	or.u	r5,r0,hi16(curbrk)
	ld	r5,r5,lo16(curbrk)
	add	r2,r2,r5
	or	r4,r2,0
	or	r13,r0,SYS_break
	tb0	0,r0,128
	br 	cerror
	/* Save old curbrk */
	or.u	r5,r0,hi16(curbrk)
	ld	r3,r5,lo16(curbrk)
	/* Update curbrk */
	st	r4,r5,lo16(curbrk)
	/* and return old curbrk */
	or	r2,r3,0
	jmp.n	r1
	or	r3,r0,0