sysdeps/unix/sysv/linux/x86_64/tst-glibc-hwcaps-2.c

   1 /* Check ISA level on shared object in glibc-hwcaps subdirectories.
   2    Copyright (C) 2021-2023 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 ("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>