libgcc/config/rs6000/atexit.c

   1 /* Copyright (C) 1999-2019 Free Software Foundation, Inc.
   2
   3    NOTE: This source is derived from an old version taken from the GNU C
   4    Library (glibc).
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  22 You should have received a copy of the GNU General Public License and
  23 a copy of the GCC Runtime Library Exception along with this program;
  24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 <http://www.gnu.org/licenses/>.  */
  26
  27 #include <stdlib.h>
  28 #include "exit.h"
  29
  30
  31 /* This is defined by newer gcc version unique for each module.  */
  32 extern void *__dso_handle __attribute__ ((__weak__));
  33
  34
  35 /* Register FUNC to be executed by `exit'.  */
  36 int
  37 #ifndef atexit
  38 attribute_hidden
  39 #endif
  40 atexit (void (*func) (void))
  41 {
  42   return __cxa_atexit ((void (*) (void *)) func, NULL,
  43                        &__dso_handle == NULL ? NULL : __dso_handle);
  44 }