unwind-arm-vxworks.c revision 1.1.1.2 
1/* Support for ARM EABI unwinding in VxWorks Downloadable Kernel Modules.
2   Copyright (C) 2017-2019 Free Software Foundation, Inc.
3
4   This file is free software; you can redistribute it and/or modify it
5   under the terms of the GNU General Public License as published by the
6   Free Software Foundation; either version 3, or (at your option) any
7   later version.
8
9   This file is distributed in the hope that it will be useful, but
10   WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   General Public License for more details.
13
14   Under Section 7 of GPL version 3, you are granted additional
15   permissions described in the GCC Runtime Library Exception, version
16   3.1, as published by the Free Software Foundation.
17
18   You should have received a copy of the GNU General Public License and
19   a copy of the GCC Runtime Library Exception along with this program;
20   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
21   <http://www.gnu.org/licenses/>.  */
22
23#if defined(__vxworks) && !defined (__RTP__)
24/* Vxworks for ARM uses __gnu_Unwind_Find_exidx to retrieve the exception
25   table for downloadable kernel modules.  As those modules are only partially
26   linked, the linker won't generate __exidx_start|end, but the two symbols
27   are still used in alternate paths from unwind-arm-common.inc.
28
29   As we don't rely on them, but still need the symbols, we define dummy
30   values here.  */
31void *__exidx_start __attribute__((__visibility__ ("hidden")));
32void *__exidx_end __attribute__((__visibility__ ("hidden")));
33#endif
34