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8dbb7a08 | 1 | /* Helpers for On-demand PLT fixup for shared objects. x86_64 version. |
2b778ceb | 2 | Copyright (C) 2020-2021 Free Software Foundation, Inc. |
8dbb7a08 VG |
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, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | /* The ABI calls for the PLT stubs to pass the index of the relocation | |
8c0664e2 | 21 | and not its offset. In _dl_profile_fixup and _dl_audit_pltexit we |
8dbb7a08 VG |
22 | also use the index. Therefore it is wasteful to compute the offset |
23 | in the trampoline just to reverse the operation immediately | |
24 | afterwards. */ | |
25 | static inline uintptr_t | |
26 | reloc_offset (uintptr_t plt0, uintptr_t pltn) | |
27 | { | |
28 | return pltn * sizeof (ElfW(Rela)); | |
29 | } | |
30 | ||
31 | static inline uintptr_t | |
32 | reloc_index (uintptr_t plt0, uintptr_t pltn, size_t size) | |
33 | { | |
34 | return pltn; | |
35 | } |