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-rw-r--r--sysdeps/s390/Makefile3
-rw-r--r--sysdeps/s390/ifunc-strncpy.h52
-rw-r--r--sysdeps/s390/multiarch/Makefile3
-rw-r--r--sysdeps/s390/multiarch/ifunc-impl-list.c15
-rw-r--r--sysdeps/s390/s390-32/multiarch/strncpy.c21
-rw-r--r--sysdeps/s390/s390-32/strncpy-z900.S (renamed from sysdeps/s390/s390-32/strncpy.S)16
-rw-r--r--sysdeps/s390/s390-64/multiarch/strncpy.c21
-rw-r--r--sysdeps/s390/s390-64/strncpy-z900.S (renamed from sysdeps/s390/s390-64/strncpy.S)16
-rw-r--r--sysdeps/s390/strncpy-vx.S (renamed from sysdeps/s390/multiarch/strncpy-vx.S)25
-rw-r--r--sysdeps/s390/strncpy.c (renamed from sysdeps/s390/multiarch/strncpy.c)17
10 files changed, 123 insertions, 66 deletions
diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 96f1538cfd..7cadf7ceba 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -63,5 +63,6 @@ sysdep_routines += bzero memset memset-z900 \
 		   strlen strlen-vx strlen-c \
 		   strnlen strnlen-vx strnlen-c \
 		   strcpy strcpy-vx strcpy-z900 \
-		   stpcpy stpcpy-vx stpcpy-c
+		   stpcpy stpcpy-vx stpcpy-c \
+		   strncpy strncpy-vx strncpy-z900
 endif
diff --git a/sysdeps/s390/ifunc-strncpy.h b/sysdeps/s390/ifunc-strncpy.h
new file mode 100644
index 0000000000..31e87e93c5
--- /dev/null
+++ b/sysdeps/s390/ifunc-strncpy.h
@@ -0,0 +1,52 @@
+/* strncpy variant information on S/390 version.
+   Copyright (C) 2018 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
+   <http://www.gnu.org/licenses/>.  */
+
+#if defined USE_MULTIARCH && IS_IN (libc)		\
+  && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define HAVE_STRNCPY_IFUNC	1
+#else
+# define HAVE_STRNCPY_IFUNC	0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_STRNCPY_IFUNC_AND_VX_SUPPORT HAVE_STRNCPY_IFUNC
+#else
+# define HAVE_STRNCPY_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define STRNCPY_DEFAULT	STRNCPY_Z13
+# define HAVE_STRNCPY_Z900_G5	0
+# define HAVE_STRNCPY_Z13	1
+#else
+# define STRNCPY_DEFAULT	STRNCPY_Z900_G5
+# define HAVE_STRNCPY_Z900_G5	1
+# define HAVE_STRNCPY_Z13	HAVE_STRNCPY_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_STRNCPY_Z900_G5
+# define STRNCPY_Z900_G5	__strncpy_default
+#else
+# define STRNCPY_Z900_G5	NULL
+#endif
+
+#if HAVE_STRNCPY_Z13
+# define STRNCPY_Z13		__strncpy_vx
+#else
+# define STRNCPY_Z13		NULL
+#endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 9517417dcb..c5189b556c 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,6 +1,5 @@
 ifeq ($(subdir),string)
-sysdep_routines += strncpy strncpy-vx \
-		   stpncpy stpncpy-vx stpncpy-c \
+sysdep_routines += stpncpy stpncpy-vx stpncpy-c \
 		   strcat strcat-vx strcat-c \
 		   strncat strncat-vx strncat-c \
 		   strcmp strcmp-vx \
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index 678ed13833..d598fc5c22 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -30,6 +30,7 @@
 #include <ifunc-strnlen.h>
 #include <ifunc-strcpy.h>
 #include <ifunc-stpcpy.h>
+#include <ifunc-strncpy.h>
 
 /* Maximum number of IFUNC implementations.  */
 #define MAX_IFUNC	3
@@ -216,6 +217,19 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 		)
 #endif /* HAVE_STPCPY_IFUNC  */
 
+#if HAVE_STRNCPY_IFUNC
+    IFUNC_IMPL (i, name, strncpy,
+# if HAVE_STRNCPY_Z13
+		IFUNC_IMPL_ADD (array, i, strncpy,
+				dl_hwcap & HWCAP_S390_VX, STRNCPY_Z13)
+# endif
+# if HAVE_STRNCPY_Z900_G5
+		IFUNC_IMPL_ADD (array, i, strncpy, 1, STRNCPY_Z900_G5)
+# endif
+		)
+#endif /* HAVE_STRNCPY_IFUNC  */
+
+
 #ifdef HAVE_S390_VX_ASM_SUPPORT
 
 # define IFUNC_VX_IMPL(FUNC)						\
@@ -232,7 +246,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 
   IFUNC_VX_IMPL (wcpcpy);
 
-  IFUNC_VX_IMPL (strncpy);
   IFUNC_VX_IMPL (wcsncpy);
 
   IFUNC_VX_IMPL (stpncpy);
diff --git a/sysdeps/s390/s390-32/multiarch/strncpy.c b/sysdeps/s390/s390-32/multiarch/strncpy.c
deleted file mode 100644
index 57f9df18d1..0000000000
--- a/sysdeps/s390/s390-32/multiarch/strncpy.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* Multiple versions of strncpy.
-   Copyright (C) 2015-2018 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
-   <http://www.gnu.org/licenses/>.  */
-
-/* This wrapper-file is needed, because otherwise file
-   sysdeps/s390/s390-[32|64]/strncpy.S will be used.  */
-#include <sysdeps/s390/multiarch/strncpy.c>
diff --git a/sysdeps/s390/s390-32/strncpy.S b/sysdeps/s390/s390-32/strncpy-z900.S
index 9086eb1c70..ebdaba0152 100644
--- a/sysdeps/s390/s390-32/strncpy.S
+++ b/sysdeps/s390/s390-32/strncpy-z900.S
@@ -24,10 +24,12 @@
  * R4 = max of bytes to copy
  */
 
+#include <ifunc-strncpy.h>
 #include "sysdep.h"
 #include "asm-syntax.h"
 
-ENTRY(strncpy)
+#if HAVE_STRNCPY_Z900_G5
+ENTRY(STRNCPY_Z900_G5)
 	.text
 	st    %r2,24(%r15)          # save dst pointer
 	slr   %r2,%r3               # %r3 points to src, %r2+%r3 to dst
@@ -75,5 +77,13 @@ ENTRY(strncpy)
 	jo    .L9
 .Lexit: l     %r2,24(%r15)          # return dst pointer
 	br    %r14
-END(strncpy)
-libc_hidden_builtin_def (strncpy)
+END(STRNCPY_Z900_G5)
+
+# if ! HAVE_STRNCPY_IFUNC
+strong_alias (STRNCPY_Z900_G5, strncpy)
+# endif
+
+# if defined SHARED && IS_IN (libc)
+strong_alias (STRNCPY_Z900_G5, __GI_strncpy)
+# endif
+#endif
diff --git a/sysdeps/s390/s390-64/multiarch/strncpy.c b/sysdeps/s390/s390-64/multiarch/strncpy.c
deleted file mode 100644
index 57f9df18d1..0000000000
--- a/sysdeps/s390/s390-64/multiarch/strncpy.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* Multiple versions of strncpy.
-   Copyright (C) 2015-2018 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
-   <http://www.gnu.org/licenses/>.  */
-
-/* This wrapper-file is needed, because otherwise file
-   sysdeps/s390/s390-[32|64]/strncpy.S will be used.  */
-#include <sysdeps/s390/multiarch/strncpy.c>
diff --git a/sysdeps/s390/s390-64/strncpy.S b/sysdeps/s390/s390-64/strncpy-z900.S
index be40aa32d5..5732e6d83b 100644
--- a/sysdeps/s390/s390-64/strncpy.S
+++ b/sysdeps/s390/s390-64/strncpy-z900.S
@@ -23,10 +23,12 @@
      %r3 = address of source (src)
      %r4 = max of bytes to copy.  */
 
+#include <ifunc-strncpy.h>
 #include "sysdep.h"
 #include "asm-syntax.h"
 
-ENTRY(strncpy)
+#if HAVE_STRNCPY_Z900_G5
+ENTRY(STRNCPY_Z900_G5)
 	.text
 	stg   %r2,48(%r15)	    # save dst pointer
 	slgr  %r2,%r3		    # %r3 points to src, %r2+%r3 to dst
@@ -86,5 +88,13 @@ ENTRY(strncpy)
 	jo    .L13
 .Lexit: lg    %r2,48(%r15)	    # return dst pointer
 	br    %r14
-END(strncpy)
-libc_hidden_builtin_def (strncpy)
+END(STRNCPY_Z900_G5)
+
+# if ! HAVE_STRNCPY_IFUNC
+strong_alias (STRNCPY_Z900_G5, strncpy)
+# endif
+
+# if defined SHARED && IS_IN (libc)
+strong_alias (STRNCPY_Z900_G5, __GI_strncpy)
+# endif
+#endif
diff --git a/sysdeps/s390/multiarch/strncpy-vx.S b/sysdeps/s390/strncpy-vx.S
index 2a37b7b84e..be09ddf092 100644
--- a/sysdeps/s390/multiarch/strncpy-vx.S
+++ b/sysdeps/s390/strncpy-vx.S
@@ -16,13 +16,13 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
-
-# include "sysdep.h"
-# include "asm-syntax.h"
+#include <ifunc-strncpy.h>
+#include "sysdep.h"
+#include "asm-syntax.h"
 
 	.text
 
+#if HAVE_STRNCPY_Z13
 /* char * strncpy (const char *dest, const char *src, size_t n)
    Copy at most n characters of string  src to dest.
 
@@ -40,7 +40,7 @@
    -v18=part of src
    -v31=register save area for r6, r7
 */
-ENTRY(__strncpy_vx)
+ENTRY(STRNCPY_Z13)
 	.machine "z13"
 	.machinemode "zarch_nohighgprs"
 
@@ -196,12 +196,13 @@ ENTRY(__strncpy_vx)
 
 	vl	%v16,0(%r5,%r3)	/* Load s.  */
 	j	.Llt64
-END(__strncpy_vx)
+END(STRNCPY_Z13)
 
-# define strncpy __strncpy_c
-# undef libc_hidden_builtin_def
-# define libc_hidden_builtin_def(name) strong_alias(__strncpy_c, __GI_strncpy)
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+# if ! HAVE_STRNCPY_IFUNC
+strong_alias (STRNCPY_Z13, strncpy)
+# endif
 
-/* Include strncpy-implementation in s390-32/s390-64 subdirectory.  */
-#include <strncpy.S>
+# if ! HAVE_STRNCPY_Z900_G5 && defined SHARED && IS_IN (libc)
+strong_alias (STRNCPY_Z13, __GI_strncpy)
+# endif
+#endif
diff --git a/sysdeps/s390/multiarch/strncpy.c b/sysdeps/s390/strncpy.c
index 2d4c456d96..ec8a26471b 100644
--- a/sysdeps/s390/multiarch/strncpy.c
+++ b/sysdeps/s390/strncpy.c
@@ -16,7 +16,9 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+#include <ifunc-strncpy.h>
+
+#if HAVE_STRNCPY_IFUNC
 # define strncpy __redirect_strncpy
 /* Omit the strncpy inline definitions because it would redefine strncpy.  */
 # define __NO_STRING_INLINES
@@ -24,6 +26,17 @@
 # undef strncpy
 # include <ifunc-resolve.h>
 
-s390_vx_libc_ifunc2_redirected (__redirect_strncpy, __strncpy, strncpy);
+# if HAVE_STRNCPY_Z900_G5
+extern __typeof (__redirect_strncpy) STRNCPY_Z900_G5 attribute_hidden;
+# endif
+
+# if HAVE_STRNCPY_Z13
+extern __typeof (__redirect_strncpy) STRNCPY_Z13 attribute_hidden;
+# endif
 
+s390_libc_ifunc_expr (__redirect_strncpy, strncpy,
+		      (HAVE_STRNCPY_Z13 && (hwcap & HWCAP_S390_VX))
+		      ? STRNCPY_Z13
+		      : STRNCPY_DEFAULT
+		      )
 #endif
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