| 1 | /* Helpers for On-demand PLT fixup for shared objects. x86_64 version. |
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| 2 | Copyright (C) 2020-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, write to the Free |
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 18 | 02111-1307 USA. */ |
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| 19 | |
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| 20 | /* The ABI calls for the PLT stubs to pass the index of the relocation |
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| 21 | and not its offset. In _dl_profile_fixup and _dl_audit_pltexit we |
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| 22 | also use the index. Therefore it is wasteful to compute the offset |
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| 23 | in the trampoline just to reverse the operation immediately |
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| 24 | afterwards. */ |
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| 25 | static inline uintptr_t |
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| 26 | reloc_offset (uintptr_t plt0, uintptr_t pltn) |
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| 27 | { |
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| 28 | return pltn * sizeof (ElfW(Rela)); |
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| 29 | } |
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| 30 | |
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| 31 | static inline uintptr_t |
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| 32 | reloc_index (uintptr_t plt0, uintptr_t pltn, size_t size) |
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| 33 | { |
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| 34 | return pltn; |
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| 35 | } |
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| 36 | |
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