1/* $NetBSD: sbrk.S,v 1.16 2005/04/22 06:58:01 simonb 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/sbrk.S 178580 2008-04-26 12:08:02Z imp $");
37#include "SYS.h"
38
39#if defined(LIBC_SCCS) && !defined(lint)
40 ASMSTR("from: @(#)sbrk.s 8.1 (Berkeley) 6/4/93")
41 ASMSTR("$NetBSD: sbrk.S,v 1.16 2005/04/22 06:58:01 simonb Exp $")
42#endif /* LIBC_SCCS and not lint */
43
44 .globl _C_LABEL(__curbrk)
45 .globl _C_LABEL(_end)
46
47 .data
48_C_LABEL(__curbrk):
49 .word _C_LABEL(_end)
50 .text
51
52LEAF(__sys_sbrk)
53 WEAK_ALIAS(sbrk, __sys_sbrk)
54 WEAK_ALIAS(_sbrk, __sys_sbrk)
55#ifdef __ABICALLS__
56 .set noreorder
57 .cpload t9
58 .set reorder
59#endif
60 addu sp, sp, -16
61 sw s0, 0(sp) # Preserve s0 value in stack
62 # it should be the same on return
63 # We can't use v1 as temporary
64 # register since syscall uses it
65 # to return 64-bit values
66 lw s0, _C_LABEL(__curbrk)
67 li v0, SYS_break
68 addu a0, a0, s0 # compute current break
69
70 syscall
71
72 bne a3, zero, 1f
73 nop
74 move v0, s0 # return old val of curbrk from above
75 lw s0, 0(sp)
76 addu sp, sp, 16
77 sw a0, _C_LABEL(__curbrk) # save current val of curbrk from above
78 j ra
79
801:
81 lw s0, 0(sp)
82 addu sp, sp, 16
83 la t9, _C_LABEL(__cerror)
84 jr t9
85END(__sys_sbrk)
2
3/*-
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell.
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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <machine/asm.h>
36__FBSDID("$FreeBSD: head/lib/libc/mips/sys/sbrk.S 178580 2008-04-26 12:08:02Z imp $");
37#include "SYS.h"
38
39#if defined(LIBC_SCCS) && !defined(lint)
40 ASMSTR("from: @(#)sbrk.s 8.1 (Berkeley) 6/4/93")
41 ASMSTR("$NetBSD: sbrk.S,v 1.16 2005/04/22 06:58:01 simonb Exp $")
42#endif /* LIBC_SCCS and not lint */
43
44 .globl _C_LABEL(__curbrk)
45 .globl _C_LABEL(_end)
46
47 .data
48_C_LABEL(__curbrk):
49 .word _C_LABEL(_end)
50 .text
51
52LEAF(__sys_sbrk)
53 WEAK_ALIAS(sbrk, __sys_sbrk)
54 WEAK_ALIAS(_sbrk, __sys_sbrk)
55#ifdef __ABICALLS__
56 .set noreorder
57 .cpload t9
58 .set reorder
59#endif
60 addu sp, sp, -16
61 sw s0, 0(sp) # Preserve s0 value in stack
62 # it should be the same on return
63 # We can't use v1 as temporary
64 # register since syscall uses it
65 # to return 64-bit values
66 lw s0, _C_LABEL(__curbrk)
67 li v0, SYS_break
68 addu a0, a0, s0 # compute current break
69
70 syscall
71
72 bne a3, zero, 1f
73 nop
74 move v0, s0 # return old val of curbrk from above
75 lw s0, 0(sp)
76 addu sp, sp, 16
77 sw a0, _C_LABEL(__curbrk) # save current val of curbrk from above
78 j ra
79
801:
81 lw s0, 0(sp)
82 addu sp, sp, 16
83 la t9, _C_LABEL(__cerror)
84 jr t9
85END(__sys_sbrk)