94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
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/* ELF program property for Intel CET.
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Copyright (C) 2017-2023 Free Software Foundation, Inc.
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This file is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>.
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*/
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/* Add x86 feature with IBT and/or SHSTK bits to ELF program property
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if they are enabled. Otherwise, contents in this header file are
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unused. Define _CET_ENDBR for assembly codes. _CET_ENDBR should be
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placed unconditionally at the entrance of a function whose address
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may be taken. */
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#ifndef _CET_H_INCLUDED
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#define _CET_H_INCLUDED
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#ifdef __ASSEMBLER__
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# if defined __CET__ && (__CET__ & 1) != 0
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# ifdef __x86_64__
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# define _CET_ENDBR endbr64
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# else
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# define _CET_ENDBR endbr32
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# endif
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# else
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# define _CET_ENDBR
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# endif
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# ifdef __ELF__
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# ifdef __CET__
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# if (__CET__ & 1) != 0
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/* GNU_PROPERTY_X86_FEATURE_1_IBT. */
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# define __PROPERTY_IBT 0x1
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# else
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# define __PROPERTY_IBT 0x0
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# endif
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# if (__CET__ & 2) != 0
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/* GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
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# define __PROPERTY_SHSTK 0x2
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# else
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# define __PROPERTY_SHSTK 0x0
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# endif
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# define __PROPERTY_BITS (__PROPERTY_IBT | __PROPERTY_SHSTK)
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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 __PROPERTY_BITS
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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 /* __CET__ */
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# endif /* __ELF__ */
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#endif /* __ASSEMBLER__ */
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#endif /* _CET_H_INCLUDED */
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