sbrk.S revision 86536 
1/*
2 * Copyright (c) 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This software was developed by the Computer Systems Engineering group
6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7 * contributed to Berkeley.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: Header: brk.s,v 1.3 92/06/25 12:56:05 mccanne Exp
38 */
39
40#if defined(SYSLIBC_SCCS) && !defined(lint)
41#if 0
42	.asciz "@(#)sbrk.s	8.1 (Berkeley) 6/4/93"
43#else
44	RCSID("$NetBSD: sbrk.S,v 1.7 2000/07/25 15:14:46 mycroft Exp $")
45#endif
46#endif /* SYSLIBC_SCCS and not lint */
47
48#if defined(SYSLIBC_RCS) && !defined(lint)
49	.text
50	.asciz "$FreeBSD: head/lib/libc/sparc64/sys/sbrk.S 86536 2001-11-18 04:48:34Z jake $"
51#endif /* SYSLIBC_RCS and not lint */
52
53#include "SYS.h"
54
55	.data
56	.globl	HIDENAME(curbrk)
57	.globl	HIDENAME(minbrk)
58	.type	HIDENAME(curbrk),@object
59	.type	HIDENAME(minbrk),@object
60HIDENAME(curbrk):
61	.xword	CNAME(_end)
62HIDENAME(minbrk):
63	.xword	CNAME(_end)
64
65_SYSENTRY(sbrk)
66	PIC_PROLOGUE(%o3, %o2)
67	SET(HIDENAME(curbrk), %o2, %o3)
68	ldx	[%o3], %o4
69	add	%o4, %o0, %o5
70	mov	%o5, %o0
71	mov	SYS_break, %g1
72	ta	%xcc, ST_SYSCALL
73	bcc,a,pt %xcc, 1f
74	 mov	%o4, %o0
75	ERROR()
761:	retl
77	 stx	%o5, [%o3]
78_SYSEND(sbrk)
79