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d5efd131 | 1 | /* Configuration of lookup functions. |
d614a753 | 2 | Copyright (C) 2000-2020 Free Software Foundation, Inc. |
d5efd131 MF |
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 | |
75efb018 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
d5efd131 MF |
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); | |
2a6ad814 | 31 | rtld_hidden_proto (_dl_symbol_address) |
d5efd131 MF |
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 | ||
6b96d6de | 39 | extern void attribute_hidden _dl_unmap (struct link_map *map); |
d5efd131 MF |
40 | |
41 | #define DL_UNMAP(map) _dl_unmap (map) | |
42 | ||
daf75146 GM |
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 | init_t init = (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 | ||
d5efd131 MF |
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)) |