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| Rev | Author | Line No. | Line |
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| 3869 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2008 Jiri Svoboda |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup rtld |
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| 30 | * @brief Test dynamic linking capabilities. |
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| 31 | * @{ |
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| 32 | */ |
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| 33 | /** |
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| 34 | * @file |
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| 35 | */ |
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| 36 | |||
| 37 | #include <stdio.h> |
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| 38 | #include <stdlib.h> |
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| 39 | #include <dlfcn.h> |
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| 40 | |||
| 41 | static void kputint(unsigned i) |
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| 42 | { |
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| 43 | // unsigned dummy; |
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| 44 | // asm volatile ( |
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| 45 | // "movl $30, %%eax;" |
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| 46 | // "int $0x30" |
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| 47 | // : "=d" (dummy) /* output - %edx clobbered */ |
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| 48 | // : "d" (i) /* input */ |
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| 49 | // : "%eax","%ecx" /* all scratch registers clobbered */ |
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| 50 | // ); |
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| 51 | /* |
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| 52 | asm volatile ( |
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| 53 | "mr %%r3, %0\n" |
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| 54 | "li %%r9, 32\n" |
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| 55 | "sc\n" |
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| 56 | : |
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| 57 | : "r" (i) |
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| 58 | : "%r3","%r9" |
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| 59 | ); |
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| 60 | */ |
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| 61 | } |
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| 62 | |||
| 63 | typedef int (*fptr_t)(void); |
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| 64 | |||
| 65 | int main(int argc, char *argv[]) |
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| 66 | { |
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| 67 | void *a; |
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| 68 | void *s; |
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| 69 | fptr_t fun; |
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| 70 | int i; |
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| 71 | |||
| 72 | char *lib_name; |
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| 73 | char *sym_name; |
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| 74 | |||
| 75 | // kputint(-1); |
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| 76 | printf("Hello from dltest!\n"); |
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| 77 | |||
| 78 | lib_name = "libtest.so.0"; |
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| 79 | sym_name = "test_func"; |
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| 80 | |||
| 81 | a = dlopen(lib_name, 0); |
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| 82 | if (a != NULL) { |
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| 83 | s = dlsym(a, sym_name); |
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| 84 | printf("symbol '%s' = 0x%lx\n", sym_name, (long) s); |
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| 85 | } else { |
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| 86 | printf("failed to dlopen() library '%s'\n", lib_name); |
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| 87 | } |
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| 88 | |||
| 89 | printf("Run dynamically-resolved function '%s'...\n", sym_name); |
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| 90 | fun = (fptr_t) s; |
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| 91 | i = (*fun)(); |
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| 92 | printf("Done. (returned 0x%x)\n", i); |
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| 93 | |||
| 94 | return 0; |
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| 95 | } |
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| 96 | |||
| 97 | /** @} |
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| 98 | */ |
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| 99 |