| vfork.S (13545) | vfork.S (15634) |
|---|---|
| 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 --- 19 unchanged lines hidden (view full) --- 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 --- 19 unchanged lines hidden (view full) --- 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 * |
| 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 |