gnu-ifunc-lib.c revision 1.8 
1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2009-2019 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program 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
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18extern volatile int gnu_ifunc_initialized;
19extern volatile unsigned long resolver_hwcap;
20extern int init_stub (int arg);
21extern int final (int arg);
22
23typedef int (*final_t) (int arg);
24
25#ifndef IFUNC_RESOLVER_ATTR
26asm (".type gnu_ifunc, %gnu_indirect_function");
27final_t
28gnu_ifunc (unsigned long hwcap)
29#else
30final_t
31gnu_ifunc_resolver (unsigned long hwcap)
32#endif
33{
34  resolver_hwcap = hwcap;
35  if (! gnu_ifunc_initialized)
36    return init_stub;
37  else
38    return final;
39}
40
41#ifdef IFUNC_RESOLVER_ATTR
42extern int gnu_ifunc (int arg);
43
44__typeof (gnu_ifunc) gnu_ifunc __attribute__ ((ifunc ("gnu_ifunc_resolver")));
45#endif
46