bcc0c894f3
Summary: Add x86 feature with IBT and/or SHSTK bits to ELF program property if they are enabled. Otherwise, contents in this header file are unused. This file is mainly design for assembly source code which want to enable CET Reviewers: hjl.tools, annita.zhang, LuoYuanke, craig.topper, tstellar, pengfei, rsmith Reviewed By: LuoYuanke Subscribers: cfe-commits, mgorny Tags: #clang Differential Revision: https://reviews.llvm.org/D79617
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*===------ cet.h -Control-flow Enforcement Technology feature ------------===
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* Add x86 feature with IBT and/or SHSTK bits to ELF program property if they
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* are enabled. Otherwise, contents in this header file are unused. This file
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* is mainly design for assembly source code which want to enable CET.
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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*===-----------------------------------------------------------------------===
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*/
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#ifndef __CET_H
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#define __CET_H
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#ifdef __ASSEMBLER__
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#ifndef __CET__
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# define _CET_ENDBR
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#endif
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#ifdef __CET__
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# ifdef __LP64__
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# if __CET__ & 0x1
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# define _CET_ENDBR endbr64
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# else
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# define _CET_ENDBR
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# endif
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# else
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# if __CET__ & 0x1
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# define _CET_ENDBR endbr32
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# else
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# define _CET_ENDBR
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# endif
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# endif
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# ifdef __LP64__
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# define __PROPERTY_ALIGN 3
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# else
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# define __PROPERTY_ALIGN 2
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# endif
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.pushsection ".note.gnu.property", "a"
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.p2align __PROPERTY_ALIGN
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.long 1f - 0f /* name length. */
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.long 4f - 1f /* data length. */
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/* NT_GNU_PROPERTY_TYPE_0. */
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.long 5 /* note type. */
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0:
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.asciz "GNU" /* vendor name. */
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1:
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.p2align __PROPERTY_ALIGN
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/* GNU_PROPERTY_X86_FEATURE_1_AND. */
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.long 0xc0000002 /* pr_type. */
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.long 3f - 2f /* pr_datasz. */
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2:
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/* GNU_PROPERTY_X86_FEATURE_1_XXX. */
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.long __CET__
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3:
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.p2align __PROPERTY_ALIGN
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4:
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.popsection
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#endif
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#endif
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#endif
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