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674ea88294
1. Include <dl-procruntime.c> to get architecture specific initializer in rtld_global. 2. Change _dl_x86_feature_1[2] to _dl_x86_feature_1. 3. Add _dl_x86_feature_control after _dl_x86_feature_1, which is a struct of 2 bitfields for IBT and SHSTK control This fixes [BZ #25887].
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* Initialize CPU feature data for Linux/x86.
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This file is part of the GNU C Library.
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Copyright (C) 2018-2020 Free Software Foundation, Inc.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#if CET_ENABLED
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# include <sys/prctl.h>
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# include <asm/prctl.h>
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static inline int __attribute__ ((always_inline))
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get_cet_status (void)
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{
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unsigned long long cet_status[3];
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if (INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_CET_STATUS, cet_status) == 0)
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return cet_status[0];
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return 0;
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}
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# ifndef SHARED
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static inline void
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x86_setup_tls (void)
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{
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__libc_setup_tls ();
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THREAD_SETMEM (THREAD_SELF, header.feature_1, GL(dl_x86_feature_1));
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}
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# define ARCH_SETUP_TLS() x86_setup_tls ()
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# endif
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#endif
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#include <sysdeps/x86/cpu-features.c>
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