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glibc/SOURCES/glibc-rh1659438-50.patch

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commit 8e87c1f6d45a63dc2175825c2dc5d66192a13aab
Author: Stefan Liebler <stli@linux.ibm.com>
Date: Tue Dec 18 13:57:23 2018 +0100
S390: Refactor wcspbrk ifunc handling.
The ifunc handling for wcspbrk is adjusted in order to omit ifunc
if the minimum architecture level already supports newer CPUs by default.
Unfortunately the c ifunc variant can't be omitted at all as it is used
by the z13 ifunc variant as fallback if the pointers are not 4-byte aligned.
Glibc internal calls will use the "newer" ifunc variant.
ChangeLog:
* sysdeps/s390/multiarch/Makefile
(sysdep_routines): Remove wcspbrk variants.
* sysdeps/s390/Makefile (sysdep_routines): Add wcspbrk variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Refactor ifunc handling for wcspbrk.
* sysdeps/s390/multiarch/wcspbrk-c.c: Move to ...
* sysdeps/s390/wcspbrk-c.c: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcspbrk-vx.S: Move to ...
* sysdeps/s390/wcspbrk-vx.S: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcspbrk.c: Move to ...
* sysdeps/s390/wcspbrk.c: ... here and adjust ifunc handling.
* sysdeps/s390/ifunc-wcspbrk.h: New file.
diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 38dbba8ccfd3cd66..af595050d43c63ed 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -73,5 +73,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
wcschr wcschr-vx wcschr-c \
wcschrnul wcschrnul-vx wcschrnul-c \
wcsrchr wcsrchr-vx wcsrchr-c \
- wcsspn wcsspn-vx wcsspn-c
+ wcsspn wcsspn-vx wcsspn-c \
+ wcspbrk wcspbrk-vx wcspbrk-c
endif
diff --git a/sysdeps/s390/ifunc-wcspbrk.h b/sysdeps/s390/ifunc-wcspbrk.h
new file mode 100644
index 0000000000000000..d3b9b7363a73fab0
--- /dev/null
+++ b/sysdeps/s390/ifunc-wcspbrk.h
@@ -0,0 +1,53 @@
+/* wcspbrk 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_WCSPBRK_IFUNC 1
+#else
+# define HAVE_WCSPBRK_IFUNC 0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_WCSPBRK_IFUNC_AND_VX_SUPPORT HAVE_WCSPBRK_IFUNC
+#else
+# define HAVE_WCSPBRK_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define WCSPBRK_DEFAULT WCSPBRK_Z13
+/* The z13 ifunc variant is using the common code variant as fallback! */
+# define HAVE_WCSPBRK_C 1
+# define HAVE_WCSPBRK_Z13 1
+#else
+# define WCSPBRK_DEFAULT WCSPBRK_C
+# define HAVE_WCSPBRK_C 1
+# define HAVE_WCSPBRK_Z13 HAVE_WCSPBRK_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_WCSPBRK_C
+# define WCSPBRK_C __wcspbrk_c
+#else
+# define WCSPBRK_C NULL
+#endif
+
+#if HAVE_WCSPBRK_Z13
+# define WCSPBRK_Z13 __wcspbrk_vx
+#else
+# define WCSPBRK_Z13 NULL
+#endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 091f5150847a404a..e1e2d9dc7495ebdc 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,6 +1,5 @@
ifeq ($(subdir),wcsmbs)
-sysdep_routines += wcspbrk wcspbrk-vx wcspbrk-c \
- wcscspn wcscspn-vx wcscspn-c \
+sysdep_routines += wcscspn wcscspn-vx wcscspn-c \
wmemchr wmemchr-vx wmemchr-c \
wmemset wmemset-vx wmemset-c \
wmemcmp wmemcmp-vx wmemcmp-c
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index 6f4de2845ba0a378..89d6e8ad7e323fec 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -60,6 +60,7 @@
#include <ifunc-wcschrnul.h>
#include <ifunc-wcsrchr.h>
#include <ifunc-wcsspn.h>
+#include <ifunc-wcspbrk.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
@@ -606,6 +607,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
)
#endif /* HAVE_WCSSPN_IFUNC */
+#if HAVE_WCSPBRK_IFUNC
+ IFUNC_IMPL (i, name, wcspbrk,
+# if HAVE_WCSPBRK_Z13
+ IFUNC_IMPL_ADD (array, i, wcspbrk,
+ dl_hwcap & HWCAP_S390_VX, WCSPBRK_Z13)
+# endif
+# if HAVE_WCSPBRK_C
+ IFUNC_IMPL_ADD (array, i, wcspbrk, 1, WCSPBRK_C)
+# endif
+ )
+#endif /* HAVE_WCSPBRK_IFUNC */
+
#ifdef HAVE_S390_VX_ASM_SUPPORT
# define IFUNC_VX_IMPL(FUNC) \
@@ -614,8 +627,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
__##FUNC##_vx) \
IFUNC_IMPL_ADD (array, i, FUNC, 1, __##FUNC##_c))
- IFUNC_VX_IMPL (wcspbrk);
-
IFUNC_VX_IMPL (wcscspn);
IFUNC_VX_IMPL (wmemchr);
diff --git a/sysdeps/s390/multiarch/wcspbrk-c.c b/sysdeps/s390/wcspbrk-c.c
similarity index 72%
rename from sysdeps/s390/multiarch/wcspbrk-c.c
rename to sysdeps/s390/wcspbrk-c.c
index 6b6e7aade46942ed..e79c6a85503dc32b 100644
--- a/sysdeps/s390/multiarch/wcspbrk-c.c
+++ b/sysdeps/s390/wcspbrk-c.c
@@ -16,16 +16,22 @@
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)
-# define WCSPBRK __wcspbrk_c
+#include <ifunc-wcspbrk.h>
-# include <wchar.h>
-extern __typeof (wcspbrk) __wcspbrk_c;
-# ifdef SHARED
-# undef libc_hidden_def
-# define libc_hidden_def(name) \
+#if HAVE_WCSPBRK_C
+# if HAVE_WCSPBRK_IFUNC || HAVE_WCSPBRK_Z13
+# define WCSPBRK WCSPBRK_C
+
+# if defined SHARED && IS_IN (libc)
+# undef libc_hidden_def
+# if ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define libc_hidden_def(name) \
__hidden_ver1 (__wcspbrk_c, __GI_wcspbrk, __wcspbrk_c);
-# endif /* SHARED */
+# else
+# define libc_hidden_def(name)
+# endif
+# endif
+# endif
# include <wcsmbs/wcspbrk.c>
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+#endif
diff --git a/sysdeps/s390/multiarch/wcspbrk-vx.S b/sysdeps/s390/wcspbrk-vx.S
similarity index 97%
rename from sysdeps/s390/multiarch/wcspbrk-vx.S
rename to sysdeps/s390/wcspbrk-vx.S
index 5c89ec5d336c1acd..5870c4684d140ab0 100644
--- a/sysdeps/s390/multiarch/wcspbrk-vx.S
+++ b/sysdeps/s390/wcspbrk-vx.S
@@ -16,7 +16,8 @@
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-wcspbrk.h>
+#if HAVE_WCSPBRK_Z13
# include "sysdep.h"
# include "asm-syntax.h"
@@ -59,7 +60,7 @@
otherwise =0;
r9: loaded byte count of vlbb accept-string
*/
-ENTRY(__wcspbrk_vx)
+ENTRY(WCSPBRK_Z13)
.machine "z13"
.machinemode "zarch_nohighgprs"
@@ -310,6 +311,15 @@ ENTRY(__wcspbrk_vx)
lgr %r2,%r1
br %r14
.Lfallback:
- jg __wcspbrk_c
-END(__wcspbrk_vx)
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+ jg WCSPBRK_C
+END(WCSPBRK_Z13)
+
+# if ! HAVE_WCSPBRK_IFUNC
+strong_alias (WCSPBRK_Z13, wcspbrk)
+# endif
+
+# if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT \
+ && defined SHARED && IS_IN (libc)
+strong_alias (WCSPBRK_Z13, __GI_wcspbrk)
+# endif
+#endif
diff --git a/sysdeps/s390/multiarch/wcspbrk.c b/sysdeps/s390/wcspbrk.c
similarity index 69%
rename from sysdeps/s390/multiarch/wcspbrk.c
rename to sysdeps/s390/wcspbrk.c
index 97876328b5ad9425..84ab911a24fba3c4 100644
--- a/sysdeps/s390/multiarch/wcspbrk.c
+++ b/sysdeps/s390/wcspbrk.c
@@ -16,14 +16,24 @@
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-wcspbrk.h>
+
+#if HAVE_WCSPBRK_IFUNC
# define wcspbrk __redirect_wcspbrk
# include <wchar.h>
# undef wcspbrk
# include <ifunc-resolve.h>
+# if HAVE_WCSPBRK_C
+extern __typeof (__redirect_wcspbrk) WCSPBRK_C attribute_hidden;
+# endif
-s390_vx_libc_ifunc2_redirected (__redirect_wcspbrk, __wcspbrk, wcspbrk)
+# if HAVE_WCSPBRK_Z13
+extern __typeof (__redirect_wcspbrk) WCSPBRK_Z13 attribute_hidden;
+# endif
-#else
-# include <wcsmbs/wcspbrk.c>
-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
+s390_libc_ifunc_expr (__redirect_wcspbrk, wcspbrk,
+ (HAVE_WCSPBRK_Z13 && (hwcap & HWCAP_S390_VX))
+ ? WCSPBRK_Z13
+ : WCSPBRK_DEFAULT
+ )
+#endif
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