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| Rev | Author | Line No. | Line |
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| 2978 | 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 <string.h> |
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| 40 | |||
| 41 | #include <rtld.h> |
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| 42 | #include <symbol.h> |
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| 43 | #include <elf.h> |
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| 44 | |||
| 2980 | svoboda | 45 | static elf_symbol_t *def_find_in_module(char *name, module_t *m) |
| 2978 | svoboda | 46 | { |
| 47 | elf_symbol_t *sym_table; |
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| 48 | elf_symbol_t *sym; |
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| 49 | elf_word nchain; |
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| 50 | size_t i; |
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| 51 | char *s_name; |
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| 2980 | svoboda | 52 | char *module_name; |
| 2978 | svoboda | 53 | |
| 2980 | svoboda | 54 | module_name = m->dyn.soname; |
| 55 | printf("def_find_in_module('%s', %s)\n", name, module_name); |
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| 2978 | svoboda | 56 | |
| 57 | sym_table = m->dyn.sym_tab; |
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| 58 | nchain = m->dyn.hash[1]; |
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| 59 | |||
| 60 | for (i = 0; i < nchain; ++i) { |
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| 61 | sym = &sym_table[i]; |
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| 62 | s_name = m->dyn.str_tab + sym->st_name; |
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| 63 | printf("cmp sym '%s'\n", s_name); |
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| 64 | if (strcmp(name, s_name) == 0) { |
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| 2980 | svoboda | 65 | printf("name match\n"); |
| 66 | if (sym->st_shndx != SHN_UNDEF) { |
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| 67 | printf("definition found. idx=%d\n", i); |
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| 68 | return sym; |
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| 69 | } else { |
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| 70 | printf("not a definition\n"); |
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| 71 | } |
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| 2978 | svoboda | 72 | } |
| 73 | } |
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| 74 | |||
| 75 | printf("not found\n"); |
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| 76 | return NULL; |
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| 77 | } |
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| 78 | |||
| 2980 | svoboda | 79 | |
| 80 | elf_symbol_t *symbol_def_find(char *name, module_t **m) |
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| 81 | { |
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| 82 | elf_symbol_t *sym; |
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| 83 | |||
| 84 | sym = def_find_in_module(name, runtime_env.program); |
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| 85 | if (sym != NULL) { *m = runtime_env.program; return sym; } |
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| 86 | |||
| 87 | sym = def_find_in_module(name, runtime_env.libc); |
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| 88 | if (sym != NULL) { *m = runtime_env.libc; return sym; } |
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| 89 | |||
| 90 | /* sym = def_find_in_module(name, runtime_env.rtld); |
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| 91 | if (sym != NULL) { *m = runtime_env.rtld; return sym; }*/ |
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| 92 | |||
| 93 | printf("symbol found nowhere\n"); |
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| 94 | *m = NULL; |
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| 95 | return NULL; |
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| 96 | } |
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| 97 | |||
| 2978 | svoboda | 98 | /** @} |
| 99 | */ |