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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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| 2969 | svoboda | 89 | |
| 90 | /* Assume for now that there's at most one needed library */ |
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| 91 | char *needed; |
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| 2968 | svoboda | 92 | } dyn_info_t; |
| 93 | |||
| 94 | void dynamic_parse(elf_dyn_t *dyn_ptr, size_t bias, dyn_info_t *info); |
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| 95 | |||
| 96 | #endif |
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| 97 | |||
| 98 | /** @} |
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| 99 | */ |