diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arc/vfork.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/arc/vfork.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arc/vfork.S b/sysdeps/unix/sysv/linux/arc/vfork.S new file mode 100644 index 0000000000..4f12b9fccf --- /dev/null +++ b/sysdeps/unix/sysv/linux/arc/vfork.S @@ -0,0 +1,42 @@ +/* vfork for ARC Linux. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <sys/syscall.h> +#include <sysdep.h> +#include <tcb-offsets.h> +#define _SIGNAL_H +#include <bits/signum-arch.h> /* For SIGCHLD */ + +#define CLONE_VM 0x00000100 +#define CLONE_VFORK 0x00004000 +#define CLONE_FLAGS_FOR_VFORK (CLONE_VM|CLONE_VFORK|SIGCHLD) + +ENTRY (__vfork) + mov r0, CLONE_FLAGS_FOR_VFORK + mov_s r1, sp + mov r8, __NR_clone + ARC_TRAP_INSN + + cmp r0, 0 + jge [blink] ; child continues + + b __syscall_error +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) |