diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/vfork.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/vfork.S | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S b/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S new file mode 100644 index 0000000000..7de1bb07ad --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S @@ -0,0 +1,60 @@ +/* Copyright (C) 2004-2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. + + 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> +#define _ERRNO_H 1 +#include <bits/errno.h> +#include <bits/wordsize.h> +#include <tcb-offsets.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 (__libc_vfork) + ear %r4,%a0 + sllg %r4,%r4,32 + ear %r4,%a1 + icm %r3,15,PID(%r4) + llilh %r1,32768 + je 1f + lcr %r1,%r3 +1: st %r1,PID(%r4) + + /* Do vfork system call. */ + svc SYS_ify (vfork) + + ltgr %r2,%r2 + je 1f + st %r3,PID(%r4) +1: + /* Check for error. */ + lghi %r4,-4095 + clgr %r2,%r4 + jgnl SYSCALL_ERROR_LABEL + + /* Normal return. */ + br %r14 +PSEUDO_END (__libc_vfork) + +#if !NOT_IN_libc +weak_alias (__libc_vfork, vfork) +strong_alias (__libc_vfork, __vfork) +libc_hidden_def (__vfork) +#endif |