| 1 | /* x86-64 PLT trampoline register save macros. |
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| 2 | Copyright (C) 2024 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, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef DL_STACK_ALIGNMENT |
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| 20 | /* Due to GCC bug: |
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| 21 | |
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| 22 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066 |
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| 23 | |
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| 24 | __tls_get_addr may be called with 8-byte stack alignment. Although |
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| 25 | this bug has been fixed in GCC 4.9.4, 5.3 and 6, we can't assume |
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| 26 | that stack will be always aligned at 16 bytes. */ |
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| 27 | # define DL_STACK_ALIGNMENT 8 |
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| 28 | #endif |
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| 29 | |
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| 30 | /* True if _dl_runtime_resolve should align stack for STATE_SAVE or align |
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| 31 | stack to 16 bytes before calling _dl_fixup. */ |
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| 32 | #define DL_RUNTIME_RESOLVE_REALIGN_STACK \ |
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| 33 | (STATE_SAVE_ALIGNMENT > DL_STACK_ALIGNMENT \ |
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| 34 | || 16 > DL_STACK_ALIGNMENT) |
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| 35 | |
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