1/* $NetBSD: brk.S,v 1.16 2003/08/07 16:42:17 agc Exp $ */
2
3/*-
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell.

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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <machine/asm.h>
36__FBSDID("$FreeBSD: head/lib/libc/mips/sys/brk.S 201858 2010-01-08 23:59:04Z imp $");
37#include "SYS.h"
38
39#if defined(LIBC_SCCS) && !defined(lint)
40 ASMSTR("from: @(#)brk.s 8.1 (Berkeley) 6/4/93")
41 ASMSTR("$NetBSD: brk.S,v 1.16 2003/08/07 16:42:17 agc Exp $")
42#endif /* LIBC_SCCS and not lint */
43
44 .globl _C_LABEL(minbrk)
45 .globl _C_LABEL(__curbrk)
46 .globl _C_LABEL(_end)
47
48 .data
49_C_LABEL(minbrk):
50 .word _C_LABEL(_end)
51
52LEAF(__sys_brk)
53 WEAK_ALIAS(brk, __sys_brk)
54 WEAK_ALIAS(_brk, __sys_brk)
55#ifdef __ABICALLS__
56 .set noreorder
57 .cpload t9
58 .set reorder
59#endif
60 lw v0, _C_LABEL(minbrk)
61 bgeu a0, v0, 1f
62 move a0, v0 # dont allow break < minbrk
631:
64 li v0, SYS_break
65 syscall
66 bne a3, zero, 2f
67 sw a0, _C_LABEL(__curbrk)
68 move v0, zero
69 j ra
702:
71 la t9, _C_LABEL(__cerror)
72 jr t9
73END(__sys_brk)