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2968 | 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 generic |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | #ifndef DYNAMIC_H_ |
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36 | #define DYNAMIC_H_ |
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37 | |||
38 | #include <bool.h> |
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39 | #include <elf_dyn.h> |
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40 | |||
41 | /** |
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42 | * Holds the data extracted from an ELF Dynamic section. |
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43 | * |
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44 | * The data is already pre-processed: Pointers are adjusted |
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45 | * to their final run-time values by adding the load bias |
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46 | * and indices into the symbol table are converted to pointers. |
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47 | */ |
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48 | typedef struct { |
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49 | /** Type of relocations used for the PLT, either DT_REL or DT_RELA */ |
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50 | int plt_rel; |
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51 | |||
52 | /** Relocation table without explicit addends */ |
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53 | void *rel; |
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54 | size_t rel_sz; |
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55 | size_t rel_ent; |
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56 | |||
57 | /** Relocation table with explicit addends */ |
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58 | void *rela; |
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59 | size_t rela_sz; |
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60 | size_t rela_ent; |
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61 | |||
62 | /** PLT relocation table */ |
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63 | void *jmp_rel; |
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64 | size_t plt_rel_sz; |
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65 | |||
66 | /** Pointer to PLT/GOT (processor-specific) */ |
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67 | void *plt_got; |
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68 | |||
69 | /** Hash table */ |
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70 | void *hash; |
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71 | |||
72 | /** String table */ |
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73 | char *str_tab; |
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74 | size_t str_sz; |
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75 | |||
76 | /** Symbol table */ |
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77 | void *sym_tab; |
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78 | size_t sym_ent; |
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79 | |||
80 | void *init; /**< Module initialization code */ |
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81 | void *fini; /**< Module cleanup code */ |
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82 | |||
83 | char *soname; /**< Library identifier */ |
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84 | char *rpath; /**< Library search path list */ |
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85 | |||
86 | bool symbolic; |
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87 | bool text_rel; |
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88 | bool bind_now; |
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89 | } dyn_info_t; |
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90 | |||
91 | void dynamic_parse(elf_dyn_t *dyn_ptr, size_t bias, dyn_info_t *info); |
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92 | |||
93 | #endif |
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94 | |||
95 | /** @} |
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96 | */ |