diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/vfork.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/arm/vfork.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/vfork.S b/sysdeps/unix/sysv/linux/arm/vfork.S new file mode 100644 index 0000000000..9ef5114b24 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arm/vfork.S @@ -0,0 +1,59 @@ +/* Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Philip Blundell <philb@gnu.org>. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#define _ERRNO_H 1 +#include <bits/errno.h> +#include <kernel-features.h> + +/* Clone the calling process, but without copying the whole address space. + The calling process is suspended until the new process exits or is + replaced by a call to `execve'. Return -1 for errors, 0 to the new process, + and the process ID of the new process to the old process. */ + +ENTRY (__vfork) + +#ifdef __NR_vfork + swi __NR_vfork + cmn a1, #4096 + RETINSTR(cc, lr) + +# ifdef __ASSUME_VFORK_SYSCALL + b PLTJMP(C_SYMBOL_NAME(__syscall_error)) +# else + /* Check if vfork syscall is known at all. */ + cmn a2, #ENOSYS + bne PLTJMP(C_SYMBOL_NAME(__syscall_error)) +# endif +#endif + +#ifndef __ASSUME_VFORK_SYSCALL + /* If we don't have vfork, fork is close enough. */ + swi __NR_fork + cmn a1, #4096 + RETINSTR(cc, lr) + b PLTJMP(C_SYMBOL_NAME(__syscall_error)) +#elif !defined __NR_vfork +# error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined" +#endif + +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) |