1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 *
| 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 *
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36 * $Id: Ovfork.S,v 1.2 1995/01/23 01:29:37 davidg Exp $
| 36 * $Id: Ovfork.S,v 1.3 1996/01/22 00:00:56 julian Exp $
|
37 */ 38 39#if defined(SYSLIBC_RCS) && !defined(lint) 40 .text
| 37 */ 38 39#if defined(SYSLIBC_RCS) && !defined(lint) 40 .text
|
41 .asciz "$Id: Ovfork.S,v 1.2 1995/01/23 01:29:37 davidg Exp $"
| 41 .asciz "$Id: Ovfork.S,v 1.3 1996/01/22 00:00:56 julian Exp $"
|
42#endif /* SYSLIBC_RCS and not lint */ 43
| 42#endif /* SYSLIBC_RCS and not lint */ 43
|
| 44#include "DEFS.h"
|
44#include "SYS.h" 45 46/* 47 * pid = vfork(); 48 * 49 * %edx == 0 in parent process, %edx == 1 in child process. 50 * %eax == pid of child in parent, %eax == pid of parent in child. 51 * 52 */
| 45#include "SYS.h" 46 47/* 48 * pid = vfork(); 49 * 50 * %edx == 0 in parent process, %edx == 1 in child process. 51 * %eax == pid of child in parent, %eax == pid of parent in child. 52 * 53 */
|
53 .set vfork,66 54.globl _vfork 55.type _vfork,@function
| |
56
| 54
|
57_vfork:
| 55ENTRY(vfork)
|
58 popl %ecx /* my rta into ecx */
| 56 popl %ecx /* my rta into ecx */
|
59 movl $vfork, %eax 60 LCALL(7,0)
| 57 lea SYS_vfork,%eax 58 KERNCALL
|
61 jb verror 62vforkok: 63 cmpl $0,%edx /* child process? */ 64 jne child /* yes */ 65 jmp parent 66#ifdef _THREAD_SAFE 67 /* 68 * Threaded version using __error(). 69 */
| 59 jb verror 60vforkok: 61 cmpl $0,%edx /* child process? */ 62 jne child /* yes */ 63 jmp parent 64#ifdef _THREAD_SAFE 65 /* 66 * Threaded version using __error(). 67 */
|
70 .globl ___error 71 .type ___error,@function
| 68 .globl CNAME(__error) 69 .type CNAME(__error),@function
|
72verror: 73 pushl %eax 74#ifdef PIC
| 70verror: 71 pushl %eax 72#ifdef PIC
|
75 call PIC_PLT(___error)
| 73 call PIC_PLT(CNAME(__error))
|
76#else
| 74#else
|
77 call ___error
| 75 call CNAME(__error)
|
78#endif 79 popl %ecx 80 movl %ecx,(%eax) 81 movl $-1,%eax 82 movl $-1,%edx 83#else /* !_THREAD_SAFE */ 84 /* 85 * Non-threaded version using global errno. 86 */
| 76#endif 77 popl %ecx 78 movl %ecx,(%eax) 79 movl $-1,%eax 80 movl $-1,%edx 81#else /* !_THREAD_SAFE */ 82 /* 83 * Non-threaded version using global errno. 84 */
|
87 .globl _errno
| 85 .globl CNAME(errno)
|
88verror: 89#ifdef PIC 90 PIC_PROLOGUE
| 86verror: 87#ifdef PIC 88 PIC_PROLOGUE
|
91 movl PIC_GOT(_errno), %edx
| 89 movl PIC_GOT(CNAME(errno)), %edx
|
92 movl %eax,(%edx) 93 PIC_EPILOGUE 94#else
| 90 movl %eax,(%edx) 91 PIC_EPILOGUE 92#else
|
95 movl %eax,_errno
| 93 movl %eax,CNAME(errno)
|
96#endif 97 movl $-1,%eax 98#endif /* !_THREAD_SAFE */ 99 jmp %ecx 100child: 101 movl $0,%eax 102parent: 103 jmp %ecx
| 94#endif 95 movl $-1,%eax 96#endif /* !_THREAD_SAFE */ 97 jmp %ecx 98child: 99 movl $0,%eax 100parent: 101 jmp %ecx
|