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703f434108
1. Factor out some of the ISA level defines in isa-level.c to
standalone header isa-level.h
2. Add new headers with ISA level dependent macros for handling
ifuncs.
Note, this file does not change any code.
Tested with and without multiarch on x86_64 for ISA levels:
{generic, x86-64-v2, x86-64-v3, x86-64-v4}
And m32 with and without multiarch.
95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/* ELF program property for x86 ISA level.
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Copyright (C) 2020-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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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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#include <elf.h>
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#include <sysdeps/x86/isa-level.h>
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/* ELF program property for x86 ISA level. */
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#ifdef INCLUDE_X86_ISA_LEVEL
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# if MINIMUM_X86_ISA_LEVEL >= 1
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/* NB: ISAs, excluding MMX, in x86-64 ISA level baseline are used. */
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# define ISA_BASELINE GNU_PROPERTY_X86_ISA_1_BASELINE
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# else
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# define ISA_BASELINE 0
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# endif
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# if MINIMUM_X86_ISA_LEVEL >= 2
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/* NB: ISAs in x86-64 ISA level v2 are used. */
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# define ISA_V2 GNU_PROPERTY_X86_ISA_1_V2
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# else
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# define ISA_V2 0
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# endif
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# if MINIMUM_X86_ISA_LEVEL >= 3
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/* NB: ISAs in x86-64 ISA level v3 are used. */
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# define ISA_V3 GNU_PROPERTY_X86_ISA_1_V3
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# else
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# define ISA_V3 0
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# endif
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# if MINIMUM_X86_ISA_LEVEL >= 4
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/* NB: ISAs in x86-64 ISA level v4 are used. */
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# define ISA_V4 GNU_PROPERTY_X86_ISA_1_V4
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# else
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# define ISA_V4 0
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# endif
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# ifndef ISA_LEVEL
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# define ISA_LEVEL (ISA_BASELINE | ISA_V2 | ISA_V3 | ISA_V4)
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# endif
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# if ISA_LEVEL
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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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# define note_stringify(arg) note_stringify_1(arg)
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# define note_stringify_1(arg) #arg
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asm(".pushsection \".note.gnu.property\",\"a\",@note\n"
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" .p2align " note_stringify (PROPERTY_ALIGN)
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/* name length. */
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"\n .long 1f - 0f\n"
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/* data length. */
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" .long 4f - 1f\n"
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/* note type: NT_GNU_PROPERTY_TYPE_0. */
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" .long " note_stringify (NT_GNU_PROPERTY_TYPE_0)
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/* vendor name. */
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"\n0: .asciz \"GNU\"\n"
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"1: .p2align " note_stringify (PROPERTY_ALIGN)
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/* pr_type: GNU_PROPERTY_X86_ISA_1_NEEDED. */
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"\n .long " note_stringify (GNU_PROPERTY_X86_ISA_1_NEEDED)
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/* pr_datasz. */
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"\n .long 3f - 2f\n"
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/* GNU_PROPERTY_X86_ISA_1_V[234]. */
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"2:\n .long " note_stringify (ISA_LEVEL)
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"\n3:\n .p2align " note_stringify (PROPERTY_ALIGN)
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"\n4:\n .popsection");
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# endif /* ISA_LEVEL */
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#endif /* INCLUDE_X86_ISA_LEVEL */
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