| 1 | /* Test CET property note parser. |
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| 2 | Copyright (C) 2018-2022 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 | #include <stdio.h> |
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| 20 | #include <elf.h> |
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| 21 | #include <tcb-offsets.h> |
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| 22 | |
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| 23 | /* This test prints out "IBT" if Intel indirect branch tracking (IBT) |
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| 24 | is enabled at run-time, which is checked by tst-cet-property-2 to |
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| 25 | verify that the IBT violation is caught on IBT machines. */ |
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| 26 | |
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| 27 | static int |
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| 28 | do_test (void) |
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| 29 | { |
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| 30 | unsigned int feature_1; |
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| 31 | #ifdef __x86_64__ |
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| 32 | # define SEG_REG "fs" |
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| 33 | #else |
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| 34 | # define SEG_REG "gs" |
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| 35 | #endif |
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| 36 | asm ("movl %%" SEG_REG ":%P1, %0" |
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| 37 | : "=r" (feature_1) : "i" (FEATURE_1_OFFSET)); |
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| 38 | if ((feature_1 & GNU_PROPERTY_X86_FEATURE_1_IBT) != 0) |
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| 39 | printf (format: "IBT\n" ); |
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| 40 | |
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| 41 | return 0; |
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| 42 | } |
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| 43 | |
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| 44 | #include <support/test-driver.c> |
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| 45 | |
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