diff options
Diffstat (limited to 'libc/ports/sysdeps/unix/sysv/linux/aarch64/vfork.S')
-rw-r--r-- | libc/ports/sysdeps/unix/sysv/linux/aarch64/vfork.S | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/libc/ports/sysdeps/unix/sysv/linux/aarch64/vfork.S b/libc/ports/sysdeps/unix/sysv/linux/aarch64/vfork.S new file mode 100644 index 000000000..f2dc49bd6 --- /dev/null +++ b/libc/ports/sysdeps/unix/sysv/linux/aarch64/vfork.S @@ -0,0 +1,49 @@ +/* Copyright (C) 1999-2012 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> +#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 SAVE_PID + SAVE_PID +#endif + mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ + mov x1, sp + DO_CALL (clone, 2) +#ifdef RESTORE_PID + RESTORE_PID +#endif + cmn x0, #4095 + b.cs 1f + RET +1: + b SYSCALL_ERROR + +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) |