1 /* Check ISA level on shared object in glibc-hwcaps subdirectories. 2 Copyright (C) 2021-2022 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 do_test(void)30do_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 ("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 ("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 ("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