| 1 | /* Initialize CPU feature data for Linux/x86. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
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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 | #if CET_ENABLED |
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| 20 | # include <sys/prctl.h> |
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| 21 | # include <asm/prctl.h> |
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| 22 | |
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| 23 | static inline int __attribute__ ((always_inline)) |
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| 24 | get_cet_status (void) |
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| 25 | { |
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| 26 | unsigned long long cet_status[3]; |
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| 27 | if (INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_CET_STATUS, cet_status) == 0) |
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| 28 | return cet_status[0]; |
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| 29 | return 0; |
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| 30 | } |
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| 31 | |
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| 32 | # ifndef SHARED |
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| 33 | static inline void |
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| 34 | x86_setup_tls (void) |
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| 35 | { |
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| 36 | __libc_setup_tls (); |
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| 37 | THREAD_SETMEM (THREAD_SELF, header.feature_1, GL(dl_x86_feature_1)); |
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| 38 | } |
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| 39 | |
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| 40 | # define ARCH_SETUP_TLS() x86_setup_tls () |
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| 41 | # endif |
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| 42 | #endif |
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| 43 | |
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| 44 | #include <sysdeps/x86/cpu-features.c> |
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| 45 | |
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