diff options
Diffstat (limited to 'lib/libc/mips/sys/Ovfork.S')
| -rw-r--r-- | lib/libc/mips/sys/Ovfork.S | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/libc/mips/sys/Ovfork.S b/lib/libc/mips/sys/Ovfork.S new file mode 100644 index 0000000..9df93ea --- /dev/null +++ b/lib/libc/mips/sys/Ovfork.S @@ -0,0 +1,64 @@ +/* $NetBSD: compat_Ovfork.S,v 1.1 2005/09/17 11:49:39 tsutsui Exp $ */ + +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Ralph Campbell. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); +#include "SYS.h" + +#if defined(LIBC_SCCS) && !defined(lint) + ASMSTR("from: @(#)Ovfork.s 8.1 (Berkeley) 6/4/93") + ASMSTR("$NetBSD: compat_Ovfork.S,v 1.1 2005/09/17 11:49:39 tsutsui Exp $") +#endif /* LIBC_SCCS and not lint */ + +/* + * pid = vfork(); + * + * v1 == 0 in parent process, v1 == 1 in child process. + * v0 == pid of child in parent, v0 == pid of parent in child. + */ + +LEAF(__sys_vfork) + WEAK_ALIAS(vfork, __sys_vfork) + WEAK_ALIAS(_vfork, __sys_vfork) + PIC_PROLOGUE(__sys_vfork) + li v0, SYS_vfork # system call number for vfork + syscall + beq a3, zero, 1f # jump if no errors + PIC_TAILCALL(__cerror) +1: + beq v1, zero, 2f # parent process ? + move v0, zero # return zero in child +2: + PIC_RETURN() +END(__sys_vfork) |
