| 1 | /* Miscellaneous definitions for both glibc build and test. |
| 2 | Copyright (C) 2024-2026 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 | #ifndef _INCLUDE_MISC_H |
| 20 | #define _INCLUDE_MISC_H |
| 21 | |
| 22 | #include <config.h> |
| 23 | |
| 24 | /* Add the compiler optimization to inhibit loop transformation to library |
| 25 | calls. This is used to avoid recursive calls in memset and memmove |
| 26 | default implementations in tests. */ |
| 27 | #ifdef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL |
| 28 | # define inhibit_loop_to_libcall \ |
| 29 | __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) |
| 30 | #else |
| 31 | # define inhibit_loop_to_libcall |
| 32 | #endif |
| 33 | |
| 34 | #ifdef HAVE_TEST_CC_INHIBIT_LOOP_TO_LIBCALL |
| 35 | # define test_cc_inhibit_loop_to_libcall \ |
| 36 | __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) |
| 37 | #else |
| 38 | # define test_cc_inhibit_loop_to_libcall |
| 39 | #endif |
| 40 | |
| 41 | /* Used to disable stack protection in sensitive places, like ifunc |
| 42 | resolvers and early static TLS init. */ |
| 43 | #ifdef __clang__ |
| 44 | # define cc_inhibit_stack_protector \ |
| 45 | __attribute__((no_stack_protector)) |
| 46 | #else |
| 47 | # define cc_inhibit_stack_protector \ |
| 48 | __attribute__ ((__optimize__ ("-fno-stack-protector"))) |
| 49 | #endif |
| 50 | |
| 51 | #if IS_IN (testsuite) || IS_IN (testsuite_internal) |
| 52 | # ifdef HAVE_TEST_CC_NO_STACK_PROTECTOR |
| 53 | # define test_inhibit_stack_protector cc_inhibit_stack_protector |
| 54 | # define inhibit_stack_protector cc_inhibit_stack_protector |
| 55 | # else |
| 56 | # define test_inhibit_stack_protector |
| 57 | # define inhibit_stack_protector |
| 58 | # endif |
| 59 | #else |
| 60 | # ifdef HAVE_CC_NO_STACK_PROTECTOR |
| 61 | # define inhibit_stack_protector cc_inhibit_stack_protector |
| 62 | # else |
| 63 | # define inhibit_stack_protector |
| 64 | # endif |
| 65 | #endif |
| 66 | |
| 67 | #endif |