1 | /* Test getauxval from a dynamic library after static dlopen. |
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 <dlfcn.h> |
20 | #include <errno.h> |
21 | #include <stdio.h> |
22 | #include <support/check.h> |
23 | #include <support/xdlfcn.h> |
24 | #include <sys/auxv.h> |
25 | |
26 | unsigned long getauxval_wrapper (unsigned long type, int *errnop); |
27 | |
28 | static int |
29 | do_test (void) |
30 | { |
31 | unsigned long outer_random = getauxval (AT_RANDOM); |
32 | if (outer_random == 0) |
33 | FAIL_UNSUPPORTED ("getauxval does not support AT_RANDOM" ); |
34 | |
35 | unsigned long missing_auxv_type; |
36 | for (missing_auxv_type = AT_RANDOM + 1; ; ++missing_auxv_type) |
37 | { |
38 | errno = 0; |
39 | if (getauxval (type: missing_auxv_type) == 0 && errno != 0) |
40 | { |
41 | TEST_COMPARE (errno, ENOENT); |
42 | break; |
43 | } |
44 | } |
45 | printf (format: "info: first missing type: %lu\n" , missing_auxv_type); |
46 | |
47 | void *handle = xdlopen (filename: "tst-auxvalmod.so" , RTLD_LAZY); |
48 | void *ptr = xdlsym (handle, symbol: "getauxval_wrapper" ); |
49 | |
50 | __typeof__ (getauxval_wrapper) *wrapper = ptr; |
51 | int inner_errno = 0; |
52 | unsigned long inner_random = wrapper (AT_RANDOM, &inner_errno); |
53 | TEST_COMPARE (outer_random, inner_random); |
54 | |
55 | inner_errno = 0; |
56 | TEST_COMPARE (wrapper (missing_auxv_type, &inner_errno), 0); |
57 | TEST_COMPARE (inner_errno, ENOENT); |
58 | |
59 | TEST_COMPARE (getauxval (AT_HWCAP), wrapper (AT_HWCAP, &inner_errno)); |
60 | TEST_COMPARE (getauxval (AT_HWCAP2), wrapper (AT_HWCAP2, &inner_errno)); |
61 | |
62 | xdlclose (handle); |
63 | return 0; |
64 | } |
65 | |
66 | #include <support/test-driver.c> |
67 | |