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| 1 | /* Configuration of lookup functions. |
|---|---|
| 2 | Copyright (C) 2000-2022 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #define ELF_FUNCTION_PTR_IS_SPECIAL |
| 20 | #define DL_UNMAP_IS_SPECIAL |
| 21 | |
| 22 | #include <dl-fptr.h> |
| 23 | |
| 24 | /* We do not support copy relocations for IA-64. */ |
| 25 | #define DL_NO_COPY_RELOCS |
| 26 | |
| 27 | /* Forward declaration. */ |
| 28 | struct link_map; |
| 29 | |
| 30 | extern void *_dl_symbol_address (struct link_map *map, const Elf64_Sym *ref); |
| 31 | rtld_hidden_proto (_dl_symbol_address) |
| 32 | |
| 33 | #define DL_SYMBOL_ADDRESS(map, ref) _dl_symbol_address(map, ref) |
| 34 | |
| 35 | extern Elf64_Addr _dl_lookup_address (const void *address); |
| 36 | |
| 37 | #define DL_LOOKUP_ADDRESS(addr) _dl_lookup_address (addr) |
| 38 | |
| 39 | extern void attribute_hidden _dl_unmap (struct link_map *map); |
| 40 | |
| 41 | #define DL_UNMAP(map) _dl_unmap (map) |
| 42 | |
| 43 | #define DL_DT_FUNCTION_ADDRESS(map, start, attr, addr) \ |
| 44 | attr volatile unsigned long int fptr[2]; \ |
| 45 | fptr[0] = (unsigned long int) (start); \ |
| 46 | fptr[1] = (map)->l_info[DT_PLTGOT]->d_un.d_ptr; \ |
| 47 | addr = (ElfW(Addr)) fptr; \ |
| 48 | |
| 49 | #define DL_CALL_DT_INIT(map, start, argc, argv, env) \ |
| 50 | { \ |
| 51 | ElfW(Addr) addr; \ |
| 52 | DL_DT_FUNCTION_ADDRESS(map, start, , addr) \ |
| 53 | dl_init_t init = (dl_init_t) addr; \ |
| 54 | init (argc, argv, env); \ |
| 55 | } |
| 56 | |
| 57 | #define DL_CALL_DT_FINI(map, start) \ |
| 58 | { \ |
| 59 | ElfW(Addr) addr; \ |
| 60 | DL_DT_FUNCTION_ADDRESS(map, start, , addr) \ |
| 61 | fini_t fini = (fini_t) addr; \ |
| 62 | fini (); \ |
| 63 | } |
| 64 | |
| 65 | /* The type of the return value of fixup/profile_fixup. */ |
| 66 | #define DL_FIXUP_VALUE_TYPE struct fdesc |
| 67 | /* Construct a value of type DL_FIXUP_VALUE_TYPE from a code address |
| 68 | and a link map. */ |
| 69 | #define DL_FIXUP_MAKE_VALUE(map, addr) \ |
| 70 | ((struct fdesc) { (addr), (map)->l_info[DT_PLTGOT]->d_un.d_ptr }) |
| 71 | /* Extract the code address from a value of type DL_FIXUP_MAKE_VALUE. |
| 72 | */ |
| 73 | #define DL_FIXUP_VALUE_CODE_ADDR(value) (value).ip |
| 74 | |
| 75 | #define DL_FIXUP_VALUE_ADDR(value) ((uintptr_t) &(value)) |
| 76 | #define DL_FIXUP_ADDR_VALUE(addr) (*(struct fdesc *) (addr)) |
| 77 | #define DL_FIXUP_BINDNOW_ADDR_VALUE(addr) (addr) |
| 78 | #define DL_FIXUP_BINDNOW_RELOC(value, new_value, st_value) \ |
| 79 | (*value) = *(struct fdesc *) (st_value) |
| 80 |
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