Rev 3689 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 3686 | 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 rtld |
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| 30 | * @brief |
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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 | /* From librtld. */ |
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| 42 | #include <module.h> |
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| 43 | #include <symbol.h> |
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| 44 | |||
| 45 | void *dlopen(const char *path, int flag) |
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| 46 | { |
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| 47 | module_t *m; |
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| 48 | |||
| 3869 | svoboda | 49 | if (runtime_env == NULL) { |
| 50 | printf("Dynamic linker not set up -- initializing.\n"); |
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| 51 | rtld_init_static(); |
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| 52 | } |
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| 53 | |||
| 3686 | svoboda | 54 | printf("dlopen(\"%s\", %d)\n", path, flag); |
| 55 | |||
| 56 | printf("module_find('%s')\n", path); |
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| 57 | m = module_find(path); |
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| 58 | if (m == NULL) { |
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| 59 | printf("NULL. module_load('%s')\n", path); |
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| 60 | m = module_load(path); |
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| 61 | printf("module_load_deps(m)\n"); |
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| 62 | module_load_deps(m); |
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| 3689 | svoboda | 63 | /* Now relocate. */ |
| 64 | printf("module_process_relocs(m)\n"); |
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| 65 | module_process_relocs(m); |
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| 3686 | svoboda | 66 | } else { |
| 67 | printf("not NULL\n"); |
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| 68 | } |
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| 69 | |||
| 70 | return (void *) m; |
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| 71 | } |
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| 72 | |||
| 73 | /* |
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| 74 | * @note Symbols with NULL values are not accounted for. |
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| 75 | */ |
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| 76 | void *dlsym(void *mod, const char *sym_name) |
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| 77 | { |
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| 78 | elf_symbol_t *sd; |
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| 79 | module_t *sm; |
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| 80 | |||
| 81 | printf("dlsym(0x%lx, \"%s\")\n", (long)mod, sym_name); |
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| 3689 | svoboda | 82 | sd = symbol_bfs_find(sym_name, (module_t *) mod, &sm); |
| 3686 | svoboda | 83 | if (sd != NULL) { |
| 84 | return symbol_get_addr(sd, sm); |
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| 85 | } |
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| 86 | |||
| 87 | return NULL; |
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| 88 | } |
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| 89 | |||
| 90 | /** @} |
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| 91 | */ |