update from main arhive 970119

[jlayton/glibc.git] / sysdeps / unix / sysv / linux / i386 / clone.S

diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S
index 7e02f76dfe759c2f21ca3ee2ba0ac7fc4b746a8f..541ae10f6ae76d8a978f5f0b70a57d47d6723fb5 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/clone.S
+++ b/sysdeps/unix/sysv/linux/i386/clone.S
@@ -1,20 +1,21 @@
-/* Copyright (C) 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
    Contributed by Richard Henderson (rth@tamu.edu)
 
-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
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+   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
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
 
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Library General Public License for more details.
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
 
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
 
 /* clone() is even more special than fork() as it mucks with stacks
    and invokes a function in the right context after its all over.  */
@@ -23,7 +24,7 @@ Cambridge, MA 02139, USA.  */
 #define _ERRNO_H       1
 #include <errnos.h>
 
-/* int clone(int (*fn)(), void *child_stack, int flags, int nargs, ...) */
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
 
         .text
 ENTRY(__clone)
@@ -35,20 +36,12 @@ ENTRY(__clone)
        movl    8(%esp),%ecx            /* no NULL stack pointers */
        testl   %ecx,%ecx
        jz      syscall_error
-       movl    16(%esp),%edx           /* no negative argument counts */
-       testl   %edx,%edx
-       js      syscall_error
 
-       /* Allocate space on the new stack and copy args over */
-       movl    %edx,%eax
-       negl    %eax
-       lea     -4(%ecx,%eax,4),%ecx
-       jz      2f
-1:     movl    16(%esp,%edx,4),%eax
-       movl    %eax,0(%ecx,%edx,4)
-       dec     %edx
-       jnz     1b
-2:
+       /* Insert the argument onto the new stack.  */
+       subl    $-8,%ecx
+       movl    16(%esp),%eax           /* no negative argument counts */
+       movl    %eax,4(%ecx)
+
        /* Save the function pointer as the zeroth argument.
           It will be popped off in the child in the ebx frobbing below.  */
        movl    4(%esp),%eax