| 1 | /* ELF program property for x86 ISA level. |
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| 2 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | In addition to the permissions in the GNU Lesser General Public |
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| 11 | License, the Free Software Foundation gives you unlimited |
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| 12 | permission to link the compiled version of this file with other |
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| 13 | programs, and to distribute those programs without any restriction |
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| 14 | coming from the use of this file. (The Lesser General Public |
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| 15 | License restrictions do apply in other respects; for example, they |
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| 16 | cover modification of the file, and distribution when not linked |
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| 17 | into another program.) |
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| 18 | |
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| 19 | The GNU C Library is distributed in the hope that it will be useful, |
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| 20 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 22 | Lesser General Public License for more details. |
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| 23 | |
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| 24 | You should have received a copy of the GNU Lesser General Public |
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| 25 | License along with the GNU C Library; if not, see |
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| 26 | <https://www.gnu.org/licenses/>. */ |
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| 27 | |
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| 28 | #include <elf.h> |
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| 29 | #include <sysdeps/x86/isa-level.h> |
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| 30 | /* ELF program property for x86 ISA level. */ |
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| 31 | #ifdef INCLUDE_X86_ISA_LEVEL |
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| 32 | # if MINIMUM_X86_ISA_LEVEL >= 1 |
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| 33 | /* NB: ISAs, excluding MMX, in x86-64 ISA level baseline are used. */ |
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| 34 | # define ISA_BASELINE GNU_PROPERTY_X86_ISA_1_BASELINE |
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| 35 | # else |
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| 36 | # define ISA_BASELINE 0 |
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| 37 | # endif |
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| 38 | |
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| 39 | # if MINIMUM_X86_ISA_LEVEL >= 2 |
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| 40 | /* NB: ISAs in x86-64 ISA level v2 are used. */ |
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| 41 | # define ISA_V2 GNU_PROPERTY_X86_ISA_1_V2 |
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| 42 | # else |
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| 43 | # define ISA_V2 0 |
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| 44 | # endif |
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| 45 | |
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| 46 | # if MINIMUM_X86_ISA_LEVEL >= 3 |
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| 47 | /* NB: ISAs in x86-64 ISA level v3 are used. */ |
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| 48 | # define ISA_V3 GNU_PROPERTY_X86_ISA_1_V3 |
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| 49 | # else |
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| 50 | # define ISA_V3 0 |
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| 51 | # endif |
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| 52 | |
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| 53 | # if MINIMUM_X86_ISA_LEVEL >= 4 |
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| 54 | /* NB: ISAs in x86-64 ISA level v4 are used. */ |
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| 55 | # define ISA_V4 GNU_PROPERTY_X86_ISA_1_V4 |
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| 56 | # else |
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| 57 | # define ISA_V4 0 |
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| 58 | # endif |
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| 59 | |
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| 60 | # ifndef ISA_LEVEL |
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| 61 | # define ISA_LEVEL (ISA_BASELINE | ISA_V2 | ISA_V3 | ISA_V4) |
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| 62 | # endif |
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| 63 | |
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| 64 | # if ISA_LEVEL |
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| 65 | # ifdef __LP64__ |
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| 66 | # define PROPERTY_ALIGN 3 |
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| 67 | # else |
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| 68 | # define PROPERTY_ALIGN 2 |
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| 69 | # endif |
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| 70 | |
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| 71 | # define note_stringify(arg) note_stringify_1(arg) |
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| 72 | # define note_stringify_1(arg) #arg |
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| 73 | |
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| 74 | asm(".pushsection \".note.gnu.property\",\"a\",@note\n" |
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| 75 | " .p2align " note_stringify (PROPERTY_ALIGN) |
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| 76 | /* name length. */ |
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| 77 | "\n .long 1f - 0f\n" |
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| 78 | /* data length. */ |
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| 79 | " .long 4f - 1f\n" |
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| 80 | /* note type: NT_GNU_PROPERTY_TYPE_0. */ |
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| 81 | " .long " note_stringify (NT_GNU_PROPERTY_TYPE_0) |
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| 82 | /* vendor name. */ |
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| 83 | "\n0: .asciz \"GNU\"\n" |
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| 84 | "1: .p2align " note_stringify (PROPERTY_ALIGN) |
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| 85 | /* pr_type: GNU_PROPERTY_X86_ISA_1_NEEDED. */ |
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| 86 | "\n .long " note_stringify (GNU_PROPERTY_X86_ISA_1_NEEDED) |
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| 87 | /* pr_datasz. */ |
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| 88 | "\n .long 3f - 2f\n" |
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| 89 | /* GNU_PROPERTY_X86_ISA_1_V[234]. */ |
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| 90 | "2:\n .long " note_stringify (ISA_LEVEL) |
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| 91 | "\n3:\n .p2align " note_stringify (PROPERTY_ALIGN) |
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| 92 | "\n4:\n .popsection" ); |
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| 93 | # endif /* ISA_LEVEL */ |
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| 94 | #endif /* INCLUDE_X86_ISA_LEVEL */ |
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| 95 | |
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