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Simplify implementation and eliminate a register preservation problem.

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Reviewed by:	Bruce Evans <bde@zeta.org.au>
This commit is contained in:
Luoqi Chen 1998-09-18 05:50:52 +00:00
parent 7ecd7a42c5
commit ae45749a50
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39455
2 changed files with 20 additions and 48 deletions
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34
lib/libc/amd64/sys/vfork.S
View file

@ -33,12 +33,12 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: Ovfork.S,v 1.8 1998/09/12 22:03:08 dt Exp $
* $Id: Ovfork.S,v 1.9 1998/09/13 20:32:45 luoqi Exp $
*/
#if defined(SYSLIBC_RCS) && !defined(lint)
.text
.asciz "$Id: Ovfork.S,v 1.8 1998/09/12 22:03:08 dt Exp $"
.asciz "$Id: Ovfork.S,v 1.9 1998/09/13 20:32:45 luoqi Exp $"
#endif /* SYSLIBC_RCS and not lint */
#include "DEFS.h"
@ -60,27 +60,13 @@ ENTRY(vfork)
popl %ecx /* my rta into ecx */
lea SYS_vfork,%eax
KERNCALL
jb verror
vforkok:
cmpl $0,%edx /* child process? */
jne child /* yes */
jmp parent
.globl CNAME(__error)
.type CNAME(__error),@function
verror:
pushl %eax
#ifdef PIC
call PIC_PLT(CNAME(__error))
#else
call CNAME(__error)
#endif
popl %edx
movl %edx,(%eax)
movl $-1,%eax
movl $-1,%edx
jmp %ecx
child:
jb 2f
cmpl $0,%edx /* parent process? */
je 1f /* yes */
movl $0,%eax
parent:
1:
jmp %ecx
2:
pushl %ecx
PIC_PROLOGUE
jmp PIC_PLT(HIDENAME(cerror))

34
lib/libc/i386/sys/Ovfork.S
View file

@ -33,12 +33,12 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: Ovfork.S,v 1.8 1998/09/12 22:03:08 dt Exp $
* $Id: Ovfork.S,v 1.9 1998/09/13 20:32:45 luoqi Exp $
*/
#if defined(SYSLIBC_RCS) && !defined(lint)
.text
.asciz "$Id: Ovfork.S,v 1.8 1998/09/12 22:03:08 dt Exp $"
.asciz "$Id: Ovfork.S,v 1.9 1998/09/13 20:32:45 luoqi Exp $"
#endif /* SYSLIBC_RCS and not lint */
#include "DEFS.h"
@ -60,27 +60,13 @@ ENTRY(vfork)
popl %ecx /* my rta into ecx */
lea SYS_vfork,%eax
KERNCALL
jb verror
vforkok:
cmpl $0,%edx /* child process? */
jne child /* yes */
jmp parent
.globl CNAME(__error)
.type CNAME(__error),@function
verror:
pushl %eax
#ifdef PIC
call PIC_PLT(CNAME(__error))
#else
call CNAME(__error)
#endif
popl %edx
movl %edx,(%eax)
movl $-1,%eax
movl $-1,%edx
jmp %ecx
child:
jb 2f
cmpl $0,%edx /* parent process? */
je 1f /* yes */
movl $0,%eax
parent:
1:
jmp %ecx
2:
pushl %ecx
PIC_PROLOGUE
jmp PIC_PLT(HIDENAME(cerror))