| 1 | /*
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| 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 |
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| 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 |
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| 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 |
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| 41 | #include <rtld/module.h>
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| 42 | #include <rtld/symbol.h>
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| 43 |
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| 44 | void *dlopen(const char *path, int flag)
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| 45 | {
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| 46 | module_t *m;
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| 47 |
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| 48 | if (runtime_env == NULL) {
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| 49 | printf("Dynamic linker not set up -- initializing.\n");
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| 50 | rtld_init_static();
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| 51 | }
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| 52 |
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| 53 | printf("dlopen(\"%s\", %d)\n", path, flag);
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| 54 |
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| 55 | printf("module_find('%s')\n", path);
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| 56 | m = module_find(path);
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| 57 | if (m == NULL) {
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| 58 | printf("NULL. module_load('%s')\n", path);
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| 59 | m = module_load(path);
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| 60 | printf("module_load_deps(m)\n");
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| 61 | module_load_deps(m);
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| 62 | /* Now relocate. */
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| 63 | printf("module_process_relocs(m)\n");
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| 64 | module_process_relocs(m);
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| 65 | } else {
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| 66 | printf("not NULL\n");
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| 67 | }
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| 68 |
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| 69 | return (void *) m;
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| 70 | }
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| 71 |
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| 72 | /*
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| 73 | * @note Symbols with NULL values are not accounted for.
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| 74 | */
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| 75 | void *dlsym(void *mod, const char *sym_name)
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| 76 | {
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| 77 | elf_symbol_t *sd;
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| 78 | module_t *sm;
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| 79 |
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| 80 | printf("dlsym(0x%lx, \"%s\")\n", (long)mod, sym_name);
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| 81 | sd = symbol_bfs_find(sym_name, (module_t *) mod, &sm);
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| 82 | if (sd != NULL) {
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| 83 | return symbol_get_addr(sd, sm);
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| 84 | }
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| 85 |
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| 86 | return NULL;
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| 87 | }
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| 88 |
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| 89 | /** @}
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| 90 | */
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