1 /* Multiple versions of memset. 2 Copyright (C) 2013-2022 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 /* Define multiple versions only for definition in libc. */ 20 #if defined SHARED && IS_IN (libc) 21 /* Redefine memset so that the compiler won't complain about the type 22 mismatch with the IFUNC selector in strong_alias, below. */ 23 # undef memset 24 # define memset __redirect_memset 25 # include <string.h> 26 # include <shlib-compat.h> 27 # include "init-arch.h" 28 29 extern __typeof (__redirect_memset) __libc_memset; 30 31 extern __typeof (__redirect_memset) __memset_ppc attribute_hidden; 32 extern __typeof (__redirect_memset) __memset_power4 attribute_hidden; 33 extern __typeof (__redirect_memset) __memset_power6 attribute_hidden; 34 extern __typeof (__redirect_memset) __memset_power7 attribute_hidden; 35 extern __typeof (__redirect_memset) __memset_power8 attribute_hidden; 36 # ifdef __LITTLE_ENDIAN__ 37 extern __typeof (__redirect_memset) __memset_power10 attribute_hidden; 38 # endif 39 40 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle 41 ifunc symbol properly. */ 42 libc_ifunc (__libc_memset, 43 # ifdef __LITTLE_ENDIAN__ 44 (hwcap2 & PPC_FEATURE2_ARCH_3_1 45 && hwcap2 & PPC_FEATURE2_HAS_ISEL 46 && hwcap & PPC_FEATURE_HAS_VSX 47 && GLRO(dl_cache_line_size) == 128) 48 ? __memset_power10 : 49 # endif 50 (hwcap2 & PPC_FEATURE2_ARCH_2_07 51 && hwcap & PPC_FEATURE_HAS_ALTIVEC 52 && GLRO(dl_cache_line_size) == 128) 53 ? __memset_power8 : 54 (hwcap & PPC_FEATURE_ARCH_2_06 55 && GLRO(dl_cache_line_size) == 128) 56 ? __memset_power7 : 57 (hwcap & PPC_FEATURE_ARCH_2_05 58 && GLRO(dl_cache_line_size) == 128) 59 ? __memset_power6 : 60 (hwcap & PPC_FEATURE_POWER4 61 && GLRO(dl_cache_line_size) == 128) 62 ? __memset_power4 63 : __memset_ppc); 64 65 #undef memset 66 strong_alias (__libc_memset, memset); 67 libc_hidden_ver (__libc_memset, memset); 68 #endif 69