1/*
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include "SYS.h"
31
32#if defined(SYSLIBC_SCCS) && !defined(lint)
33	/* .asciz "@(#)sbrk.s	8.1 (Berkeley) 6/4/93" */
34RCSID("$NetBSD: sbrk.S,v 1.10 2003/08/07 16:42:33 agc Exp $")
35#endif /* SYSLIBC_SCCS and not lint */
36
37	.globl	_end
38	.globl	_C_LABEL(__minbrk)
39	.globl	CURBRK
40
41#ifdef WEAK_ALIAS
42WEAK_ALIAS(sbrk, _sbrk)
43#endif
44
45	.data
46_C_LABEL(__minbrk):
47	.long	_end
48CURBRK:
49	.long	_end
50	.text
51
52ENTRY(_sbrk, 0)
53	addl3	CURBRK,4(%ap),-(%sp)
54	pushl	$1
55	movl	%ap,%r3
56	movl	%sp,%ap
57	chmk	$ SYS_break
58	jcs 	err
59	movl	CURBRK,%r0
60	addl2	4(%r3),CURBRK
61	ret
62err:
63	jmp	CERROR+2
64END(_sbrk)
65