1 files changed, 80 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/strncpy-or-cat-overflow-def.h b/sysdeps/x86_64/multiarch/strncpy-or-cat-overflow-def.h
new file mode 100644
index 0000000000..d4f4d6c82b
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/strncpy-or-cat-overflow-def.h
@@ -0,0 +1,80 @@
+/* Helper for getting proper name of overflow fallback function for
+   {wc|st}{p|r|s}n{cat|cpy}
+
+   All versions must be listed in ifunc-impl-list.c.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _STRNCPY_OR_CAT_OVERFLOW_DEF_H_
+#define _STRNCPY_OR_CAT_OVERFLOW_DEF_H_ 1
+
+#if defined USE_MULTIARCH && IS_IN(libc)
+#  define UNDERSCORES __
+#  ifdef USE_WITH_SSE2
+#    define ISA_EXT _sse2
+#  elif defined USE_WITH_AVX2
+#    ifdef USE_WITH_RTM
+#      define ISA_EXT _avx2_rtm
+#    else
+#      define ISA_EXT _avx2
+#    endif
+
+#  elif defined USE_WITH_EVEX256
+#    define ISA_EXT _evex
+#  elif defined USE_WITH_EVEX512
+#    define ISA_EXT _evex512
+#  endif
+#else
+#  define UNDERSCORES
+#  define ISA_EXT
+#endif
+
+#ifdef USE_AS_WCSCPY
+#  define STRCPY_PREFIX wc
+#  define STRCAT_PREFIX wcs
+#  ifdef USE_AS_STPCPY
+#    define STRCPY_POSTFIX pcpy
+#  else
+#    define STRCPY_POSTFIX scpy
+#  endif
+#else
+#  define STRCPY_PREFIX st
+#  define STRCAT_PREFIX str
+#  ifdef USE_AS_STPCPY
+#    define STRCPY_POSTFIX pcpy
+#  else
+#    define STRCPY_POSTFIX rcpy
+#  endif
+#endif
+#define STRCAT_POSTFIX cat
+
+#define PRIMITIVE_OF_NAMER(underscores, prefix, postfix, ext)                 \
+  underscores##prefix##postfix##ext
+
+#define OF_NAMER(...) PRIMITIVE_OF_NAMER (__VA_ARGS__)
+
+#ifndef OVERFLOW_STRCPY
+#  define OVERFLOW_STRCPY                                                     \
+    OF_NAMER (UNDERSCORES, STRCPY_PREFIX, STRCPY_POSTFIX, ISA_EXT)
+#endif
+
+#ifndef OVERFLOW_STRCAT
+#  define OVERFLOW_STRCAT                                                     \
+    OF_NAMER (UNDERSCORES, STRCAT_PREFIX, STRCAT_POSTFIX, ISA_EXT)
+#endif
+
+#endif