diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/nios2/vfork.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/nios2/vfork.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/nios2/vfork.S b/sysdeps/unix/sysv/linux/nios2/vfork.S new file mode 100644 index 0000000000..67a06520d0 --- /dev/null +++ b/sysdeps/unix/sysv/linux/nios2/vfork.S @@ -0,0 +1,44 @@ +/* vfork for Nios II Linux. + Copyright (C) 2005-2015 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> +#include <tcb-offsets.h> + +ENTRY(__vfork) + + ldw r6, PID_OFFSET(r23) + sub r7, zero, r6 + bne r7, zero, 2f + movhi r7, %hi(0x80000000) +2: + stw r7, PID_OFFSET(r23) + + movi r4, 0x4111 /* (CLONE_VM | CLONE_VFORK | SIGCHLD) */ + mov r5, zero + DO_CALL (clone, 2) + + beq r2, zero, 1f + stw r6, PID_OFFSET(r23) +1: + bne r7, zero, SYSCALL_ERROR_LABEL + ret + +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) |