1/*	$NetBSD: brk.S,v 1.4 1996/10/17 03:08:15 cgd Exp $	*/
2
3/*
4 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22 *  School of Computer Science
23 *  Carnegie Mellon University
24 *  Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30#include <machine/asm.h>
31__FBSDID("$FreeBSD$");
32
33#include "SYS.h"
34
35	.globl	_end
36IMPORT(curbrk, 8)
37
38	.data
39EXPORT(minbrk)
40	.quad	_end
41
42	.text
43ENTRY(brk, 1)
44	add	r14=@ltoff(minbrk),gp ;;
45	ld8	r14=[r14] ;;
46	ld8	r14=[r14] ;;
47	cmp.ltu	p6,p0=r32,r14 ;;
48(p6)	mov	r32=r14 ;;
49	st8	[sp]=r32
50	CALLSYS_ERROR(break)
51	ld8	r15=[sp]
52	add	r14=@ltoff(curbrk),gp ;;
53	ld8	r14=[r14] ;;
54	st8	[r14]=r15
55	mov	ret0=0
56	br.ret.sptk.few rp
57END(brk)
58