1 /* Multiple versions of memmove. 2 Copyright (C) 2016-2021 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 #include <ifunc-memcpy.h> 20 21 #if HAVE_MEMMOVE_IFUNC 22 /* If we don't use ifunc, an alias is defined for memmove 23 in sysdeps/s390/memmove-c.c or sysdeps/s390/memcpy.S 24 depending on the used default implementation. */ 25 # undef memmove 26 # define memmove __redirect_memmove 27 # include <string.h> 28 # include <ifunc-resolve.h> 29 # undef memmove 30 31 # if HAVE_MEMMOVE_C 32 extern __typeof (__redirect_memmove) MEMMOVE_C attribute_hidden; 33 # endif 34 35 # if HAVE_MEMMOVE_Z13 36 extern __typeof (__redirect_memmove) MEMMOVE_Z13 attribute_hidden; 37 # endif 38 39 # if HAVE_MEMMOVE_ARCH13 40 extern __typeof (__redirect_memmove) MEMMOVE_ARCH13 attribute_hidden; 41 # endif 42 43 s390_libc_ifunc_expr (__redirect_memmove, memmove, 44 ({ 45 s390_libc_ifunc_expr_stfle_init (); 46 (HAVE_MEMMOVE_ARCH13 && (hwcap & HWCAP_S390_VXRS_EXT2) 47 && S390_IS_ARCH13_MIE3 (stfle_bits)) 48 ? MEMMOVE_ARCH13 49 : (HAVE_MEMMOVE_Z13 && (hwcap & HWCAP_S390_VX)) 50 ? MEMMOVE_Z13 51 : MEMMOVE_DEFAULT; 52 }) 53 ) 54 #endif 55