diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/clone.S | 47 |
1 files changed, 20 insertions, 27 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S index 7e02f76dfe..541ae10f6a 100644 --- 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 |