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/* vfork for Nios II Linux.
Copyright (C) 2005-2016 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>
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
#include <tcb-offsets.h>
#endif
ENTRY(__vfork)
#ifdef RESET_PID
ldw r6, PID_OFFSET(r23)
sub r7, zero, r6
bne r7, zero, 2f
movhi r7, %hi(0x80000000)
2:
stw r7, PID_OFFSET(r23)
#endif
movi r4, 0x4111 /* (CLONE_VM | CLONE_VFORK | SIGCHLD) */
mov r5, zero
/* Do the system call. */
movi r2, SYS_ify(clone)
trap
beq r2, zero, 1f
#ifdef RESET_PID
stw r6, PID_OFFSET(r23)
#endif
1:
ret
END(__vfork)
weak_alias(__vfork, vfork)
libc_hidden_def(vfork)
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