1 | /* Check ISA level on dlopened shared object. |
2 | Copyright (C) 2020-2024 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 <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 (file: 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 (handle: h, symbol: "test" ); |
53 | |
54 | if (fp () != 0) |
55 | FAIL_EXIT1 ("test () != 0\n" ); |
56 | |
57 | dlclose (handle: 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 (modname: "tst-isa-level-mod-1-baseline.so" , true); |
77 | return EXIT_SUCCESS; |
78 | } |
79 | |
80 | do_test_1 (modname: "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 (modname: "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 (modname: "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 (modname: "tst-isa-level-mod-1-v2.so" , true); |
99 | |
100 | return EXIT_SUCCESS; |
101 | } |
102 | |
103 | #include <support/test-driver.c> |
104 | |