sysdeps/unix/sysv/linux/nios2/vfork.S

   1 /* vfork for Nios II Linux.
   2    Copyright (C) 2005-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include <tcb-offsets.h>
  21
  22 ENTRY(__vfork)
  23
  24         movi    r4, 0x4111 /* (CLONE_VM | CLONE_VFORK | SIGCHLD) */
  25         mov     r5, zero
  26         DO_CALL (clone, 2)
  27
  28         bne     r7, zero, SYSCALL_ERROR_LABEL
  29         ret
  30
  31 PSEUDO_END (__vfork)
  32 libc_hidden_def (__vfork)
  33
  34 weak_alias (__vfork, vfork)