| 1 | /* Check ISA level on shared object in glibc-hwcaps subdirectories. |
|---|---|
| 2 | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <stdbool.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <stdio.h> |
| 22 | #include <elf.h> |
| 23 | #include <get-isa-level.h> |
| 24 | #include <support/check.h> |
| 25 | #include <support/test-driver.h> |
| 26 | |
| 27 | extern int dso_isa_level (void); |
| 28 | |
| 29 | static int |
| 30 | do_test (void) |
| 31 | { |
| 32 | const struct cpu_features *cpu_features = __get_cpu_features (); |
| 33 | unsigned int isa_level = get_isa_level (cpu_features); |
| 34 | bool has_isa_baseline = ((isa_level & GNU_PROPERTY_X86_ISA_1_BASELINE) |
| 35 | == GNU_PROPERTY_X86_ISA_1_BASELINE); |
| 36 | bool has_isa_v2 = ((isa_level & GNU_PROPERTY_X86_ISA_1_V2) |
| 37 | == GNU_PROPERTY_X86_ISA_1_V2); |
| 38 | bool has_isa_v3 = ((isa_level & GNU_PROPERTY_X86_ISA_1_V3) |
| 39 | == GNU_PROPERTY_X86_ISA_1_V3); |
| 40 | bool has_isa_v4 = ((isa_level & GNU_PROPERTY_X86_ISA_1_V4) |
| 41 | == GNU_PROPERTY_X86_ISA_1_V4); |
| 42 | |
| 43 | if (!has_isa_baseline) |
| 44 | return EXIT_FAILURE; |
| 45 | |
| 46 | int level = dso_isa_level (); |
| 47 | int ret; |
| 48 | switch (level) |
| 49 | { |
| 50 | case 1: |
| 51 | case 2: |
| 52 | /* The default libx86-64-isa-level.so is used. */ |
| 53 | printf (format: "The default shared library is used.\n"); |
| 54 | if (has_isa_v3 || has_isa_v4 || (!has_isa_v2 && level == 2)) |
| 55 | ret = EXIT_FAILURE; |
| 56 | else |
| 57 | ret = EXIT_SUCCESS; |
| 58 | break; |
| 59 | case 3: |
| 60 | /* libx86-64-isa-level.so marked as x86-64 ISA level 3 needed in |
| 61 | x86-64-v2 should be ignored on lesser CPU. */ |
| 62 | printf (format: "x86-64 ISA level 3 shared library is used.\n"); |
| 63 | if (has_isa_v4 || !has_isa_v3) |
| 64 | ret = EXIT_FAILURE; |
| 65 | else |
| 66 | ret = EXIT_SUCCESS; |
| 67 | break; |
| 68 | case 4: |
| 69 | /* libx86-64-isa-level.so marked as x86-64 ISA level 4 needed in |
| 70 | x86-64-v3 should be ignored on lesser CPU. */ |
| 71 | printf (format: "x86-64 ISA level 4 shared library is used.\n"); |
| 72 | if (has_isa_v4) |
| 73 | ret = EXIT_SUCCESS; |
| 74 | else |
| 75 | ret = EXIT_FAILURE; |
| 76 | break; |
| 77 | default: |
| 78 | abort (); |
| 79 | } |
| 80 | return ret; |
| 81 | } |
| 82 | |
| 83 | #include <support/test-driver.c> |
| 84 |