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874214db62
1. Remove _dl_runtime_resolve_shstk and _dl_runtime_profile_shstk. 2. Move CET offsets from x86 cpu-features-offsets.sym to x86-64 features-offsets.sym. 3. Rename x86 cet-control.h to x86-64 feature-control.h since it is only for x86-64 and also used for PLT rewrite. 4. Add x86-64 ldsodefs.h to include feature-control.h. 5. Change TUNABLE_CALLBACK (set_plt_rewrite) to x86-64 only. 6. Move x86 dl-procruntime.c to x86-64. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* x86-64 feature tuning.
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This file is part of the GNU C Library.
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Copyright (C) 2018-2024 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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#ifndef _X86_64_FEATURE_CONTROL_H
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#define _X86_64_FEATURE_CONTROL_H
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/* For each CET feature, IBT and SHSTK, valid control values. */
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enum dl_x86_cet_control
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{
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/* Enable CET features based on ELF property note. */
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cet_elf_property = 0,
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/* Always enable CET features. */
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cet_always_on,
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/* Always disable CET features. */
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cet_always_off,
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/* Enable CET features permissively. */
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cet_permissive
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};
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/* PLT rewrite control. */
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enum dl_plt_rewrite_control
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{
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/* No PLT rewrite. */
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plt_rewrite_none,
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/* Rewrite PLT with JMP at run-time. */
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plt_rewrite_jmp,
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/* Rewrite PLT with JMP and JMPABS at run-time. */
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plt_rewrite_jmpabs
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};
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struct dl_x86_feature_control
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{
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enum dl_x86_cet_control ibt : 2;
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enum dl_x86_cet_control shstk : 2;
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enum dl_plt_rewrite_control plt_rewrite : 2;
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};
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#endif /* feature-control.h */
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