sysdeps/x86/tst-isa-level-1.c

   1 /* Check ISA level on dlopened shared object.
   2    Copyright (C) 2020-2023 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 <stdlib.h>
  20 #include <stdbool.h>
  21 #include <string.h>
  22 #include <elf.h>
  23 #include <get-isa-level.h>
  24 #include <support/xdlfcn.h>
  25 #include <support/check.h>
  26 #include <support/test-driver.h>
  27
  28 static void
  29 do_test_1 (const char *modname, bool fail)
  30 {
  31   int (*fp) (void);
  32   void *h;
  33
  34   h = dlopen (modname, RTLD_LAZY);
  35   if (h == NULL)
  36     {
  37       const char *err = dlerror ();
  38       if (fail)
  39         {
  40           if (strstr (err, "CPU ISA level is lower than required") == NULL)
  41             FAIL_EXIT1 ("incorrect dlopen '%s' error: %s\n", modname, err);
  42
  43           return;
  44         }
  45
  46       FAIL_EXIT1 ("cannot open '%s': %s\n", modname, err);
  47     }
  48
  49   if (fail)
  50     FAIL_EXIT1 ("dlopen '%s' should have failed\n", modname);
  51
  52   fp = xdlsym (h, "test");
  53
  54   if (fp () != 0)
  55     FAIL_EXIT1 ("test () != 0\n");
  56
  57   dlclose (h);
  58 }
  59
  60 static int
  61 do_test (void)
  62 {
  63   const struct cpu_features *cpu_features = __get_cpu_features ();
  64   unsigned int isa_level = get_isa_level (cpu_features);
  65   bool has_isa_baseline = ((isa_level & GNU_PROPERTY_X86_ISA_1_BASELINE)
  66                            == GNU_PROPERTY_X86_ISA_1_BASELINE);
  67   bool has_isa_v2 = ((isa_level & GNU_PROPERTY_X86_ISA_1_V2)
  68                            == GNU_PROPERTY_X86_ISA_1_V2);
  69   bool has_isa_v3 = ((isa_level & GNU_PROPERTY_X86_ISA_1_V3)
  70                            == GNU_PROPERTY_X86_ISA_1_V3);
  71   bool has_isa_v4 = ((isa_level & GNU_PROPERTY_X86_ISA_1_V4)
  72                            == GNU_PROPERTY_X86_ISA_1_V4);
  73
  74   if (!has_isa_baseline)
  75     {
  76       do_test_1 ("tst-isa-level-mod-1-baseline.so", true);
  77       return EXIT_SUCCESS;
  78     }
  79
  80   do_test_1 ("tst-isa-level-mod-1-baseline.so", false);
  81
  82   /* Skip on x86-64-v4 platforms since dlopen v4 module always works.  */
  83   if (has_isa_v4)
  84     return EXIT_SUCCESS;
  85
  86   do_test_1 ("tst-isa-level-mod-1-v4.so", true);
  87
  88   /* Skip on x86-64-v3 platforms since dlopen v3 module always works.  */
  89   if (has_isa_v3)
  90     return EXIT_SUCCESS;
  91
  92   do_test_1 ("tst-isa-level-mod-1-v3.so", true);
  93
  94   /* Skip on x86-64-v2 platforms since dlopen v2 module always works.  */
  95   if (has_isa_v2)
  96     return EXIT_SUCCESS;
  97
  98   do_test_1 ("tst-isa-level-mod-1-v2.so", true);
  99
 100   return EXIT_SUCCESS;
 101 }
 102
 103 #include <support/test-driver.c>