1/*	$NetBSD: sbrk.S,v 1.16 2013/07/16 23:00:15 matt Exp $	*/
2
3/*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * the Systems Programming Group of the University of Utah Computer
9 * Science Department.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include "SYS.h"
37
38#if defined(LIBC_SCCS) && !defined(lint)
39#if 0
40	RCSID("from: @(#)sbrk.s	5.1 (Berkeley) 5/12/90")
41#else
42	RCSID("$NetBSD: sbrk.S,v 1.16 2013/07/16 23:00:15 matt Exp $")
43#endif
44#endif /* LIBC_SCCS and not lint */
45
46	.globl	_end
47	.globl	_C_LABEL(__curbrk)
48	.hidden	_C_LABEL(__curbrk)
49
50#ifdef WEAK_ALIAS
51WEAK_ALIAS(sbrk, _sbrk)
52#endif
53
54	.data
55_C_LABEL(__curbrk):
56	.long	_end
57
58	.text
59
60ENTRY(_sbrk)
61	LEA_LCL(_C_LABEL(__curbrk),%a1)
62	movl	(%a1),%d0
63	addl	%d0,4(%sp)
64	SYSTRAP(break)
65	jcs 	CERROR
66	movl	(%a1),%d0
67	movl	4(%sp),(%a1)
68#ifdef	__SVR4_ABI__
69	movl	%d0,%a0
70#endif
71	rts
72END(_sbrk)
73