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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 rtld |
29 | /** @addtogroup rtld rtld |
30 | * @brief |
30 | * @brief |
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 <string.h> |
39 | #include <string.h> |
40 | 40 | ||
41 | #include <rtld.h> |
41 | #include <rtld.h> |
42 | #include <symbol.h> |
42 | #include <symbol.h> |
43 | #include <elf.h> |
43 | #include <elf.h> |
44 | 44 | ||
45 | elf_symbol_t *symbol_def_find(module_t *m, char *name) |
45 | static elf_symbol_t *def_find_in_module(char *name, module_t *m) |
46 | { |
46 | { |
47 | elf_symbol_t *sym_table; |
47 | elf_symbol_t *sym_table; |
48 | elf_symbol_t *sym; |
48 | elf_symbol_t *sym; |
49 | elf_word nchain; |
49 | elf_word nchain; |
50 | size_t i; |
50 | size_t i; |
51 | char *s_name; |
51 | char *s_name; |
- | 52 | char *module_name; |
|
52 | 53 | ||
- | 54 | module_name = m->dyn.soname; |
|
53 | printf("symbol_def_find(m, '%s')\n", name); |
55 | printf("def_find_in_module('%s', %s)\n", name, module_name); |
54 | 56 | ||
55 | sym_table = m->dyn.sym_tab; |
57 | sym_table = m->dyn.sym_tab; |
56 | nchain = m->dyn.hash[1]; |
58 | nchain = m->dyn.hash[1]; |
57 | 59 | ||
58 | for (i = 0; i < nchain; ++i) { |
60 | for (i = 0; i < nchain; ++i) { |
59 | sym = &sym_table[i]; |
61 | sym = &sym_table[i]; |
60 | s_name = m->dyn.str_tab + sym->st_name; |
62 | s_name = m->dyn.str_tab + sym->st_name; |
61 | printf("cmp sym '%s'\n", s_name); |
63 | printf("cmp sym '%s'\n", s_name); |
62 | if (strcmp(name, s_name) == 0) { |
64 | if (strcmp(name, s_name) == 0) { |
- | 65 | printf("name match\n"); |
|
- | 66 | if (sym->st_shndx != SHN_UNDEF) { |
|
63 | printf("found. idx=%d\n", i); |
67 | printf("definition found. idx=%d\n", i); |
64 | return sym; |
68 | return sym; |
- | 69 | } else { |
|
- | 70 | printf("not a definition\n"); |
|
- | 71 | } |
|
65 | } |
72 | } |
66 | } |
73 | } |
67 | 74 | ||
68 | printf("not found\n"); |
75 | printf("not found\n"); |
69 | return NULL; |
76 | return NULL; |
- | 77 | } |
|
- | 78 | ||
- | 79 | ||
- | 80 | elf_symbol_t *symbol_def_find(char *name, module_t **m) |
|
- | 81 | { |
|
- | 82 | elf_symbol_t *sym; |
|
- | 83 | ||
- | 84 | sym = def_find_in_module(name, runtime_env.program); |
|
- | 85 | if (sym != NULL) { *m = runtime_env.program; return sym; } |
|
- | 86 | ||
- | 87 | sym = def_find_in_module(name, runtime_env.libc); |
|
- | 88 | if (sym != NULL) { *m = runtime_env.libc; return sym; } |
|
- | 89 | ||
- | 90 | /* sym = def_find_in_module(name, runtime_env.rtld); |
|
- | 91 | if (sym != NULL) { *m = runtime_env.rtld; return sym; }*/ |
|
- | 92 | ||
- | 93 | printf("symbol found nowhere\n"); |
|
- | 94 | *m = NULL; |
|
- | 95 | return NULL; |
|
70 | } |
96 | } |
71 | 97 | ||
72 | /** @} |
98 | /** @} |
73 | */ |
99 | */ |
74 | 100 |