1 /* Multiple versions of strstr. 2 All versions must be listed in ifunc-impl-list.c. 3 Copyright (C) 2012-2021 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, see 18 <https://www.gnu.org/licenses/>. */ 19 20 /* Redefine strstr so that the compiler won't complain about the type 21 mismatch with the IFUNC selector in strong_alias, below. */ 22 #undef strstr 23 #define strstr __redirect_strstr 24 #include <string.h> 25 #undef strstr 26 27 #define STRSTR __strstr_sse2 28 #ifdef SHARED 29 # undef libc_hidden_builtin_def 30 # define libc_hidden_builtin_def(name) \ 31 __hidden_ver1 (__strstr_sse2, __GI_strstr, __strstr_sse2); 32 #endif 33 34 #include "string/strstr.c" 35 36 extern __typeof (__redirect_strstr) __strstr_sse2_unaligned attribute_hidden; 37 extern __typeof (__redirect_strstr) __strstr_sse2 attribute_hidden; 38 39 #include "init-arch.h" 40 41 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle 42 ifunc symbol properly. */ 43 extern __typeof (__redirect_strstr) __libc_strstr; 44 libc_ifunc (__libc_strstr, 45 HAS_ARCH_FEATURE (Fast_Unaligned_Load) 46 ? __strstr_sse2_unaligned 47 : __strstr_sse2) 48 49 #undef strstr 50 strong_alias (__libc_strstr, strstr) 51