1/* $NetBSD: compat_Ovfork.S,v 1.1 2005/09/17 11:49:39 tsutsui 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/Ovfork.S 209231 2010-06-16 12:55:14Z jchandra $");
37#include "SYS.h"
38
39#if defined(LIBC_SCCS) && !defined(lint)
40 ASMSTR("from: @(#)Ovfork.s 8.1 (Berkeley) 6/4/93")
41 ASMSTR("$NetBSD: compat_Ovfork.S,v 1.1 2005/09/17 11:49:39 tsutsui Exp $")
42#endif /* LIBC_SCCS and not lint */
43
44/*
45 * pid = vfork();
46 *
47 * v1 == 0 in parent process, v1 == 1 in child process.
48 * v0 == pid of child in parent, v0 == pid of parent in child.
49 */
50
51LEAF(__sys_vfork)
52 WEAK_ALIAS(vfork, __sys_vfork)
53 WEAK_ALIAS(_vfork, __sys_vfork)
54 PIC_PROLOGUE(__sys_vfork)
55 li v0, SYS_vfork # system call number for vfork
56 syscall
57 beq a3, zero, 1f # jump if no errors
58 PIC_TAILCALL(__cerror)
591:
60 beq v1, zero, 2f # parent process ?
61 move v0, zero # return zero in child
622:
63 PIC_RETURN()
64END(__sys_vfork)
2
3/*-
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell.
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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <machine/asm.h>
36__FBSDID("$FreeBSD: head/lib/libc/mips/sys/Ovfork.S 209231 2010-06-16 12:55:14Z jchandra $");
37#include "SYS.h"
38
39#if defined(LIBC_SCCS) && !defined(lint)
40 ASMSTR("from: @(#)Ovfork.s 8.1 (Berkeley) 6/4/93")
41 ASMSTR("$NetBSD: compat_Ovfork.S,v 1.1 2005/09/17 11:49:39 tsutsui Exp $")
42#endif /* LIBC_SCCS and not lint */
43
44/*
45 * pid = vfork();
46 *
47 * v1 == 0 in parent process, v1 == 1 in child process.
48 * v0 == pid of child in parent, v0 == pid of parent in child.
49 */
50
51LEAF(__sys_vfork)
52 WEAK_ALIAS(vfork, __sys_vfork)
53 WEAK_ALIAS(_vfork, __sys_vfork)
54 PIC_PROLOGUE(__sys_vfork)
55 li v0, SYS_vfork # system call number for vfork
56 syscall
57 beq a3, zero, 1f # jump if no errors
58 PIC_TAILCALL(__cerror)
591:
60 beq v1, zero, 2f # parent process ?
61 move v0, zero # return zero in child
622:
63 PIC_RETURN()
64END(__sys_vfork)