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/* vfork for Linux, RISC-V version.
Copyright (C) 2005-2021 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/>. */
/* vfork() is just a special case of clone(). */
#include <sys/asm.h>
#include <sysdep.h>
#define __ASSEMBLY__
#include <asm/signal.h>
#define CLONE_VM 0x00000100 /* Set if VM shared between processes. */
#define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to
wake it up on mm_release. */
.text
LEAF (__libc_vfork)
li a0, (CLONE_VFORK | CLONE_VM | SIGCHLD)
mv a1, sp
li a7, __NR_clone
scall
bltz a0, 1f
ret
1: j __syscall_error
END (__libc_vfork)
weak_alias (__libc_vfork, vfork)
strong_alias (__libc_vfork, __vfork)
libc_hidden_def (__vfork)
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