freebsd-nq/lib/libc/mips/sys/Ovfork.S
Jayachandran C. a7c139c0af Merge jmallett@'s n64 work into HEAD - changeset 1.
Update libc assembly code to use macros that work on both o32 and n64.
Merge string functions from NetBSD.

The changes are from http://svn.freebsd.org/base/user/jmallett/octeon

Approved by:	rrs (mentor), jmallett
2010-06-16 12:55:14 +00:00

65 lines
2.5 KiB
ArmAsm

/* $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)