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

   1 /* Copyright (C) 2004-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <sysdep.h>
  19 #include <tcb-offsets.h>
  20
  21 ENTRY(__libc_vfork)
  22         PSEUDO_PROLOGUE
  23
  24         /* Load the thread pointer value in A1 across the vfork.  */
  25         rduniq
  26         mov     v0, a1
  27
  28         lda     v0, SYS_ify(vfork)
  29         call_pal PAL_callsys
  30
  31         /* Normal error check and return.  */
  32         bne     a3, SYSCALL_ERROR_LABEL
  33         ret
  34
  35 PSEUDO_END (__libc_vfork)
  36
  37 #if IS_IN (libc)
  38 weak_alias (__libc_vfork, vfork)
  39 strong_alias (__libc_vfork, __vfork)
  40 libc_hidden_def (__vfork)
  41 #endif