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      1  1.1  joerg /*===------ cet.h -Control-flow Enforcement Technology  feature ------------===
      2  1.1  joerg  * Add x86 feature with IBT and/or SHSTK bits to ELF program property if they
      3  1.1  joerg  * are enabled. Otherwise, contents in this header file are unused. This file
      4  1.1  joerg  * is mainly design for assembly source code which want to enable CET.
      5  1.1  joerg  *
      6  1.1  joerg  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      7  1.1  joerg  * See https://llvm.org/LICENSE.txt for license information.
      8  1.1  joerg  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      9  1.1  joerg  *
     10  1.1  joerg  *===-----------------------------------------------------------------------===
     11  1.1  joerg  */
     12  1.1  joerg #ifndef __CET_H
     13  1.1  joerg #define __CET_H
     14  1.1  joerg 
     15  1.1  joerg #ifdef __ASSEMBLER__
     16  1.1  joerg 
     17  1.1  joerg #ifndef __CET__
     18  1.1  joerg # define _CET_ENDBR
     19  1.1  joerg #endif
     20  1.1  joerg 
     21  1.1  joerg #ifdef __CET__
     22  1.1  joerg 
     23  1.1  joerg # ifdef __LP64__
     24  1.1  joerg #  if __CET__ & 0x1
     25  1.1  joerg #    define _CET_ENDBR endbr64
     26  1.1  joerg #  else
     27  1.1  joerg #    define _CET_ENDBR
     28  1.1  joerg #  endif
     29  1.1  joerg # else
     30  1.1  joerg #  if __CET__ & 0x1
     31  1.1  joerg #    define _CET_ENDBR endbr32
     32  1.1  joerg #  else
     33  1.1  joerg #    define _CET_ENDBR
     34  1.1  joerg #  endif
     35  1.1  joerg # endif
     36  1.1  joerg 
     37  1.1  joerg 
     38  1.1  joerg #  ifdef __LP64__
     39  1.1  joerg #   define __PROPERTY_ALIGN 3
     40  1.1  joerg #  else
     41  1.1  joerg #   define __PROPERTY_ALIGN 2
     42  1.1  joerg #  endif
     43  1.1  joerg 
     44  1.1  joerg 	.pushsection ".note.gnu.property", "a"
     45  1.1  joerg 	.p2align __PROPERTY_ALIGN
     46  1.1  joerg 	.long 1f - 0f		/* name length.  */
     47  1.1  joerg 	.long 4f - 1f		/* data length.  */
     48  1.1  joerg 	/* NT_GNU_PROPERTY_TYPE_0.   */
     49  1.1  joerg 	.long 5			/* note type.  */
     50  1.1  joerg 0:
     51  1.1  joerg 	.asciz "GNU"		/* vendor name.  */
     52  1.1  joerg 1:
     53  1.1  joerg 	.p2align __PROPERTY_ALIGN
     54  1.1  joerg 	/* GNU_PROPERTY_X86_FEATURE_1_AND.  */
     55  1.1  joerg 	.long 0xc0000002	/* pr_type.  */
     56  1.1  joerg 	.long 3f - 2f		/* pr_datasz.  */
     57  1.1  joerg 2:
     58  1.1  joerg 	/* GNU_PROPERTY_X86_FEATURE_1_XXX.  */
     59  1.1  joerg 	.long __CET__
     60  1.1  joerg 3:
     61  1.1  joerg 	.p2align __PROPERTY_ALIGN
     62  1.1  joerg 4:
     63  1.1  joerg 	.popsection
     64  1.1  joerg #endif
     65  1.1  joerg #endif
     66  1.1  joerg #endif
     67