1 | /* GLRO(dl_pagesize) initialization DSO test with a static executable. |
2 | Copyright (C) 2013-2022 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 <stddef.h> |
21 | #include <stdio.h> |
22 | #include <unistd.h> |
23 | |
24 | /* Check that the same page size is reported both directly and by a DSO |
25 | mapped from a static executable. |
26 | |
27 | On targets that support different page sizes, the kernel communicates |
28 | the size currently in use via the auxiliary vector. The auxiliary |
29 | vector and HWCAP/HWCAP2 bits are copied across the static dlopen |
30 | boundary in __rtld_static_init. */ |
31 | static int |
32 | do_test (void) |
33 | { |
34 | int pagesize = getpagesize (); |
35 | int (*my_getpagesize) (void); |
36 | int my_pagesize; |
37 | void *handle; |
38 | |
39 | /* Try to map a module. */ |
40 | handle = dlopen (file: "modstatic5.so" , RTLD_LAZY | RTLD_LOCAL); |
41 | if (handle == NULL) |
42 | { |
43 | printf (format: "dlopen (modstatic5.so): %s\n" , dlerror ()); |
44 | return 1; |
45 | } |
46 | |
47 | /* Get at its symbol. */ |
48 | my_getpagesize = dlsym (handle: handle, name: "my_getpagesize" ); |
49 | if (my_getpagesize == NULL) |
50 | { |
51 | printf (format: "dlsym (my_getpagesize): %s\n" , dlerror ()); |
52 | return 1; |
53 | } |
54 | |
55 | /* Make sure the page size reported is the same either way. */ |
56 | my_pagesize = my_getpagesize (); |
57 | if (my_pagesize != pagesize) |
58 | { |
59 | printf (format: "my_getpagesize: got %i, expected %i\n" , my_pagesize, pagesize); |
60 | return 1; |
61 | } |
62 | |
63 | /* All done, clean up. */ |
64 | my_getpagesize = NULL; |
65 | dlclose (handle: handle); |
66 | |
67 | return 0; |
68 | } |
69 | |
70 | #define TEST_FUNCTION do_test () |
71 | #include "../test-skeleton.c" |
72 | |