1/*	$OpenBSD: sbrk.S,v 1.17 2016/05/30 05:18:52 guenther Exp $	*/
2
3/*
4 * Copyright (c) 1999 Michael Shalayeff
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
26 * THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "SYS.h"
30
31	.import	_end, data
32
33	.data
34	.export	__curbrk, data
35__curbrk
36	.long	_end
37
38	.weak	sbrk
39
40LEAF_ENTRY(sbrk)
41#ifdef __PIC__
42	addil	LT%__curbrk, r19
43	ldw	RT%__curbrk(r1), t1
44	ldw	0(t1), t2
45#else
46	ldil	L%__curbrk, t1
47	ldw	R%__curbrk(t1), t2
48#endif
49	add	arg0, t2, arg0
50	stw	arg0, HPPA_FRAME_ARG(0)(sp)
51
52	SYSCALL(break)
53
54#ifdef __PIC__
55	addil	LT%__curbrk, r19
56	ldw	RT%__curbrk(r1), t1
57#else
58	ldil	L%__curbrk, t1
59	ldo	R%__curbrk(t1), t1
60#endif
61	ldw	HPPA_FRAME_ARG(0)(sp), arg0
62	ldw	0(t1), ret0
63	bv	r0(rp)
64	stw	arg0, 0(t1)
65
66EXIT(sbrk)
67
68	.end
69
70