diff options
Diffstat (limited to 'sysdeps/unix/bsd/i386/vfork.S')
| -rw-r--r-- | sysdeps/unix/bsd/i386/vfork.S | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/sysdeps/unix/bsd/i386/vfork.S b/sysdeps/unix/bsd/i386/vfork.S deleted file mode 100644 index 69cbeedb99..0000000000 --- a/sysdeps/unix/bsd/i386/vfork.S +++ /dev/null @@ -1,39 +0,0 @@ -/* Copyright (C) 1993-2013 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -/* Since vfork shares the address space between the parent and child, - we must take care to avoid the child unwinding the stack frame and - clobbering it for the parent. */ - -.text -ENTRY (__vfork) - popl scratch /* Save the return PC in a register. */ - DO_CALL (vfork, 0) /* Do the system call. */ - pushl scratch /* Put the return PC back on the stack. */ - jb syscall_error /* Branch if error. */ - /* R1 is now 0 for the parent and 1 for the child. Decrement it to - make it -1 (all bits set) for the parent, and 0 (no bits set) - for the child. Then AND it with R0, so the parent gets - R0&-1==R0, and the child gets R0&0==0. */ - decl r1 - andl r1, r0 - ret -libc_hidden_def (__vfork) - -weak_alias (__vfork, vfork) |