__vfork14.S revision 1.3 
1/*	$NetBSD: __vfork14.S,v 1.3 1998/10/01 19:25:05 kleink Exp $	*/
2
3/*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 *	from: @(#)Ovfork.s	5.1 (Berkeley) 4/23/90
39 */
40
41#include <machine/asm.h>
42#if defined(SYSLIBC_SCCS) && !defined(lint)
43	RCSID("$NetBSD: __vfork14.S,v 1.3 1998/10/01 19:25:05 kleink Exp $")
44#endif /* SYSLIBC_SCCS and not lint */
45
46#include "SYS.h"
47
48#ifdef _REENTRANT
49	.globl	_C_LABEL(__errno)
50#else
51	.globl	_C_LABEL(errno)
52#endif
53
54/*
55 * pid = vfork();
56 *
57 * %edx == 0 in parent process, %edx == 1 in child process.
58 * %eax == pid of child in parent, %eax == pid of parent in child.
59 *
60 */
61ENTRY(__vfork14)
62	popl	%ecx		/* my rta into ecx */
63	movl	$(SYS___vfork14),%eax
64	int	$0x80
65	jc	err
66	decl	%edx
67	andl	%edx,%eax
68	jmp	%ecx
69err:
70#ifdef _REENTRANT
71	pushl	%ecx
72	pushl	%eax
73#ifdef PIC
74	PIC_PROLOGUE
75	call	PIC_PLT(_C_LABEL(__errno))
76	PIC_EPILOGUE
77#else
78	call	_C_LABEL(__errno)
79#endif /* PIC */
80	popl	%ecx
81	movl	%ecx,(%eax)
82	popl	%ecx
83#else
84#ifdef PIC
85	PIC_PROLOGUE
86	movl	PIC_GOT(_C_LABEL(errno)),%edx
87	PIC_EPILOGUE
88	movl	%eax,(%edx)
89#else
90	movl	%eax,_C_LABEL(errno)
91#endif /* PIC */
92#endif /* _REENTRANT */
93	movl	$-1,%eax
94	jmp	%ecx
95