1/* Program with local IFUNC resolver which crashes, for testing bug 24214.
2 Copyright (C) 2019-2024 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 <https://www.gnu.org/licenses/>. */
18
19/* The construct below is expected to produce an IRELATIVE relocation
20 with an IFUNC resolver that crashes. ldd should not performs such
21 relocations. */
22
23#include <config.h>
24
25#ifdef HAVE_GCC_IFUNC
26
27# include <stddef.h>
28
29static void
30implementation (void)
31{
32 /* Produce a crash, without depending on any relocations. */
33 volatile char *volatile p = NULL;
34 *p = 0;
35}
36
37static __typeof__ (implementation) *
38resolver (void)
39{
40 /* Produce a crash, without depending on any relocations. */
41 volatile char *volatile p = NULL;
42 *p = 0;
43 return implementation;
44}
45
46static void magic (void) __attribute__ ((ifunc ("resolver")));
47
48void (*magic_ptr) (void) = magic;
49
50#endif /* HAVE_GCC_IFUNC */
51
52/* The program is expected not to run. */
53int
54main (void)
55{
56 return 1;
57}
58

source code of glibc/elf/tst-ifunc-fault-lazy.c