Rewrite to use clone.

diff --git a/sysdeps/unix/sysv/linux/i386/vfork.S b/sysdeps/unix/sysv/linux/i386/vfork.S
index 118fccb..1f6469a 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/vfork.S
+++ b/sysdeps/unix/sysv/linux/i386/vfork.S
@@ -1,6 +1,6 @@
 /* Copyright (C) 1999 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Andreas Schwab <schwab@gnu.org>.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public License as
@@ -28,37 +28,21 @@
 
 ENTRY (__vfork)
 
-#ifdef __NR_vfork
+       /* We have to use the clone() system call.  The flags to use are
+               CLONE_VFORK | CLONE_VM
+          and we send SIGCHLD on termination (i.e., flags = 0x4111).  */
 
-       /* Pop the return PC value into ECX.  */
-       popl    %ecx
-
-       /* Stuff the syscall number in EAX and enter into the kernel.  */
-       movl    $SYS_ify (vfork), %eax
-       int     $0x80
-       cmpl    $-4095, %eax
-       jae     .Lerror         /* Branch forward if it failed.  */
-
-       /* Jump to the return PC.  */
-       jmp     *%ecx
-
-.Lerror:
-       /* Push back the return PC.  */
-       pushl   %ecx
-
-       /* Check if vfork syscall is known at all.  */
-       cmpl    $-ENOSYS, %eax
-       jne     SYSCALL_ERROR_LABEL
-
-#endif
-
-       /* If we don't have vfork, fork is close enough.  */
-
-       movl    $SYS_ify (fork), %eax
+       popl    %edx            /* Pop return address.  */
+       pushl   %ebx
+       movl    %esp, %ecx
+       movl    $0x4111, %ebx
+       movl    $SYS_ify(clone), %eax
        int     $0x80
+       popl    %ebx
+       pushl   %edx
        cmpl    $-4095, %eax
        jae     SYSCALL_ERROR_LABEL
-.Lpseudo_end:
+L(pseudo_end):
        ret
 
 PSEUDO_END (__vfork)