| 1 | /* Program with local IFUNC resolver which crashes, for testing bug 24214. |
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| 2 | Copyright (C) 2019-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | /* The construct below is expected to produce an IRELATIVE relocation |
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| 20 | with an IFUNC resolver that crashes. ldd should not performs such |
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| 21 | relocations. */ |
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| 22 | |
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| 23 | #include <config.h> |
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| 24 | |
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| 25 | #ifdef HAVE_GCC_IFUNC |
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| 26 | |
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| 27 | # include <stddef.h> |
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| 28 | |
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| 29 | static void |
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| 30 | implementation (void) |
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| 31 | { |
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| 32 | /* Produce a crash, without depending on any relocations. */ |
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| 33 | volatile char *volatile p = NULL; |
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| 34 | *p = 0; |
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| 35 | } |
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| 36 | |
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| 37 | static __typeof__ (implementation) * |
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| 38 | resolver (void) |
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| 39 | { |
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| 40 | /* Produce a crash, without depending on any relocations. */ |
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| 41 | volatile char *volatile p = NULL; |
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| 42 | *p = 0; |
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| 43 | return implementation; |
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| 44 | } |
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| 45 | |
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| 46 | static void magic (void) __attribute__ ((ifunc ("resolver" ))); |
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| 47 | |
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| 48 | void (*magic_ptr) (void) = magic; |
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| 49 | |
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| 50 | #endif /* HAVE_GCC_IFUNC */ |
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| 51 | |
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| 52 | /* The program is expected not to run. */ |
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| 53 | int |
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| 54 | main (void) |
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| 55 | { |
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| 56 | return 1; |
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| 57 | } |
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| 58 | |
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