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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jiri Svoboda |
2 | * Copyright (c) 2008 Jiri Svoboda |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup rtld |
29 | /** @addtogroup rtld |
30 | * @brief Test dynamic linking capabilities. |
30 | * @brief Test dynamic linking capabilities. |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #include <stdio.h> |
37 | #include <stdio.h> |
38 | #include <stdlib.h> |
38 | #include <stdlib.h> |
39 | #include <dlfcn.h> |
39 | #include <dlfcn.h> |
40 | 40 | ||
41 | static void kputint(unsigned i) |
41 | static void kputint(unsigned i) |
42 | { |
42 | { |
43 | // unsigned dummy; |
43 | // unsigned dummy; |
44 | // asm volatile ( |
44 | // asm volatile ( |
45 | // "movl $30, %%eax;" |
45 | // "movl $30, %%eax;" |
46 | // "int $0x30" |
46 | // "int $0x30" |
47 | // : "=d" (dummy) /* output - %edx clobbered */ |
47 | // : "=d" (dummy) /* output - %edx clobbered */ |
48 | // : "d" (i) /* input */ |
48 | // : "d" (i) /* input */ |
49 | // : "%eax","%ecx" /* all scratch registers clobbered */ |
49 | // : "%eax","%ecx" /* all scratch registers clobbered */ |
50 | // ); |
50 | // ); |
51 | /* |
51 | /* |
52 | asm volatile ( |
52 | asm volatile ( |
53 | "mr %%r3, %0\n" |
53 | "mr %%r3, %0\n" |
54 | "li %%r9, 32\n" |
54 | "li %%r9, 32\n" |
55 | "sc\n" |
55 | "sc\n" |
56 | : |
56 | : |
57 | : "r" (i) |
57 | : "r" (i) |
58 | : "%r3","%r9" |
58 | : "%r3","%r9" |
59 | ); |
59 | ); |
60 | */ |
60 | */ |
61 | } |
61 | } |
62 | 62 | ||
63 | typedef void (*fptr_t)(void); |
63 | typedef int (*fptr_t)(void); |
64 | 64 | ||
65 | int main(int argc, char *argv[]) |
65 | int main(int argc, char *argv[]) |
66 | { |
66 | { |
67 | void *a; |
67 | void *a; |
68 | void *s; |
68 | void *s; |
69 | fptr_t fun; |
69 | fptr_t fun; |
- | 70 | int i; |
|
70 | 71 | ||
71 | char *lib_name; |
72 | char *lib_name; |
72 | char *sym_name; |
73 | char *sym_name; |
73 | 74 | ||
74 | // kputint(-1); |
75 | // kputint(-1); |
75 | printf("Hello from dltest!\n"); |
76 | printf("Hello from dltest!\n"); |
76 | 77 | ||
77 | lib_name = "libtest.so.0"; |
78 | lib_name = "libtest.so.0"; |
78 | sym_name = "test_func"; |
79 | sym_name = "test_func"; |
79 | 80 | ||
80 | a = dlopen(lib_name, 0); |
81 | a = dlopen(lib_name, 0); |
81 | if (a != NULL) { |
82 | if (a != NULL) { |
82 | s = dlsym(a, sym_name); |
83 | s = dlsym(a, sym_name); |
83 | printf("symbol '%s' = 0x%lx\n", sym_name, (long) s); |
84 | printf("symbol '%s' = 0x%lx\n", sym_name, (long) s); |
84 | } else { |
85 | } else { |
85 | printf("failed to dlopen() library '%s'\n", lib_name); |
86 | printf("failed to dlopen() library '%s'\n", lib_name); |
86 | } |
87 | } |
87 | 88 | ||
88 | printf("Run dynamically-resolved function '%s'...\n", sym_name); |
89 | printf("Run dynamically-resolved function '%s'...\n", sym_name); |
89 | fun = (fptr_t) s; |
90 | fun = (fptr_t) s; |
90 | (*fun)(); |
91 | i = (*fun)(); |
91 | printf("OK\n"); |
92 | printf("Done. (returned 0x%x)\n", i); |
92 | 93 | ||
93 | return 0; |
94 | return 0; |
94 | } |
95 | } |
95 | 96 | ||
96 | /** @} |
97 | /** @} |
97 | */ |
98 | */ |
98 | 99 | ||
99 | 100 |