1/*	$OpenBSD: sbrk.S,v 1.8 2015/09/10 13:29:09 guenther Exp $	*/
2/*	$NetBSD: sbrk.S,v 1.4 1996/10/17 03:08:20 cgd Exp $	*/
3
4/*
5 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
6 * All rights reserved.
7 *
8 * Author: Chris G. Demetriou
9 *
10 * Permission to use, copy, modify and distribute this software and
11 * its documentation is hereby granted, provided that both the copyright
12 * notice and this permission notice appear in all copies of the
13 * software, derivative works or modified versions, and any portions
14 * thereof, and that both notices appear in supporting documentation.
15 *
16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19 *
20 * Carnegie Mellon requests users of this software to return to
21 *
22 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
23 *  School of Computer Science
24 *  Carnegie Mellon University
25 *  Pittsburgh PA 15213-3890
26 *
27 * any improvements or extensions that they make and grant Carnegie the
28 * rights to redistribute these changes.
29 */
30
31#include "SYS.h"
32
33	.globl	_end
34
35	.data
36EXPORT(__curbrk)
37	.quad	_end
38	.size	__curbrk, . - __curbrk
39	.type	__curbrk,@object
40
41	.text
42	.weak	sbrk
43LEAF(sbrk, 1)
44	br	pv, L1				/* XXX profiling */
45L1:	LDGP(pv)
46	ldq	a1, __curbrk
47	addq	a0, a1, a0
48	CALLSYS_ERROR(break)
49	stq	a0, __curbrk
50	mov	a1, v0
51	RET
52END(sbrk)
53