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glibc/glibc-rh1659438-46.patch

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commit cf3ccc31a3d76a9b4db410d3087055c3aff2b71b
Author: Stefan Liebler <stli@linux.ibm.com>
Date: Tue Dec 18 13:57:22 2018 +0100
S390: Refactor wcschr ifunc handling.
The ifunc handling for wcschr 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 wcschr variants.
* sysdeps/s390/Makefile (sysdep_routines): Add wcschr variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Refactor ifunc handling for wcschr.
* sysdeps/s390/multiarch/wcschr-c.c: Move to ...
* sysdeps/s390/wcschr-c.c: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcschr-vx.S: Move to ...
* sysdeps/s390/wcschr-vx.S: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcschr.c: Move to ...
* sysdeps/s390/wcschr.c: ... here and adjust ifunc handling.
* sysdeps/s390/ifunc-wcschr.h: New file.
diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 9146b32a939fd5bd..91ee84a54b713e4a 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -69,5 +69,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
wcscat wcscat-vx wcscat-c \
wcsncat wcsncat-vx wcsncat-c \
wcscmp wcscmp-vx wcscmp-c \
- wcsncmp wcsncmp-vx wcsncmp-c
+ wcsncmp wcsncmp-vx wcsncmp-c \
+ wcschr wcschr-vx wcschr-c
endif
diff --git a/sysdeps/s390/ifunc-wcschr.h b/sysdeps/s390/ifunc-wcschr.h
new file mode 100644
index 0000000000000000..2fe9110f7c9564d2
--- /dev/null
+++ b/sysdeps/s390/ifunc-wcschr.h
@@ -0,0 +1,53 @@
+/* wcschr 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_WCSCHR_IFUNC 1
+#else
+# define HAVE_WCSCHR_IFUNC 0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_WCSCHR_IFUNC_AND_VX_SUPPORT HAVE_WCSCHR_IFUNC
+#else
+# define HAVE_WCSCHR_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define WCSCHR_DEFAULT WCSCHR_Z13
+/* The z13 ifunc variant is using the common code variant as fallback! */
+# define HAVE_WCSCHR_C 1
+# define HAVE_WCSCHR_Z13 1
+#else
+# define WCSCHR_DEFAULT WCSCHR_C
+# define HAVE_WCSCHR_C 1
+# define HAVE_WCSCHR_Z13 HAVE_WCSCHR_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_WCSCHR_C
+# define WCSCHR_C __wcschr_c
+#else
+# define WCSCHR_C NULL
+#endif
+
+#if HAVE_WCSCHR_Z13
+# define WCSCHR_Z13 __wcschr_vx
+#else
+# define WCSCHR_Z13 NULL
+#endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index d1740fa8e4f5faa8..b282613b4705bb14 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,6 +1,5 @@
ifeq ($(subdir),wcsmbs)
-sysdep_routines += wcschr wcschr-vx wcschr-c \
- wcschrnul wcschrnul-vx wcschrnul-c \
+sysdep_routines += wcschrnul wcschrnul-vx wcschrnul-c \
wcsrchr wcsrchr-vx wcsrchr-c \
wcsspn wcsspn-vx wcsspn-c \
wcspbrk wcspbrk-vx wcspbrk-c \
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index 8c9e788ae5962e2a..c69165465dc97111 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -56,6 +56,7 @@
#include <ifunc-wcsncat.h>
#include <ifunc-wcscmp.h>
#include <ifunc-wcsncmp.h>
+#include <ifunc-wcschr.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
@@ -554,6 +555,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
)
#endif /* HAVE_WCSNCMP_IFUNC */
+#if HAVE_WCSCHR_IFUNC
+ IFUNC_IMPL (i, name, wcschr,
+# if HAVE_WCSCHR_Z13
+ IFUNC_IMPL_ADD (array, i, wcschr,
+ dl_hwcap & HWCAP_S390_VX, WCSCHR_Z13)
+# endif
+# if HAVE_WCSCHR_C
+ IFUNC_IMPL_ADD (array, i, wcschr, 1, WCSCHR_C)
+# endif
+ )
+#endif /* HAVE_WCSCHR_IFUNC */
+
#ifdef HAVE_S390_VX_ASM_SUPPORT
# define IFUNC_VX_IMPL(FUNC) \
@@ -562,8 +575,6 @@ __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 (wcschr);
-
IFUNC_VX_IMPL (wcschrnul);
IFUNC_VX_IMPL (wcsrchr);
diff --git a/sysdeps/s390/multiarch/wcschr-c.c b/sysdeps/s390/wcschr-c.c
similarity index 61%
rename from sysdeps/s390/multiarch/wcschr-c.c
rename to sysdeps/s390/wcschr-c.c
index 8d6679c7f2f89864..4908492a0a72ed28 100644
--- a/sysdeps/s390/multiarch/wcschr-c.c
+++ b/sysdeps/s390/wcschr-c.c
@@ -16,22 +16,29 @@
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 WCSCHR __wcschr_c
-
-# include <wchar.h>
-extern __typeof (__wcschr) __wcschr_c;
-# undef weak_alias
-# define weak_alias(name, alias)
-# ifdef SHARED
-# undef libc_hidden_def
-# define libc_hidden_def(name) \
- __hidden_ver1 (__wcschr_c, __GI_wcschr, __wcschr_c); \
- strong_alias (__wcschr_c, __wcschr_c_1); \
+#include <ifunc-wcschr.h>
+
+#if HAVE_WCSCHR_C
+# if HAVE_WCSCHR_IFUNC || HAVE_WCSCHR_Z13
+# define WCSCHR WCSCHR_C
+
+# undef weak_alias
+# define weak_alias(name, alias)
+
+# if defined SHARED && IS_IN (libc)
+# undef libc_hidden_weak
+# define libc_hidden_weak(name)
+# undef libc_hidden_def
+# if ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define libc_hidden_def(name) \
+ __hidden_ver1 (__wcschr_c, __GI_wcschr, __wcschr_c) __attribute__((weak)); \
+ strong_alias (__wcschr_c, __wcschr_c_1); \
__hidden_ver1 (__wcschr_c_1, __GI___wcschr, __wcschr_c_1);
-# undef libc_hidden_weak
-# define libc_hidden_weak(name)
-# endif /* SHARED */
+# else
+# define libc_hidden_def(name)
+# endif
+# endif
+# endif
# include <wcsmbs/wcschr.c>
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+#endif
diff --git a/sysdeps/s390/multiarch/wcschr-vx.S b/sysdeps/s390/wcschr-vx.S
similarity index 88%
rename from sysdeps/s390/multiarch/wcschr-vx.S
rename to sysdeps/s390/wcschr-vx.S
index 94e5df7f365aa361..dd24998390c7e2e6 100644
--- a/sysdeps/s390/multiarch/wcschr-vx.S
+++ b/sysdeps/s390/wcschr-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-wcschr.h>
+#if HAVE_WCSCHR_Z13
# include "sysdep.h"
# include "asm-syntax.h"
@@ -36,7 +37,7 @@
-v17=index of unequal
-v18=replicated c
*/
-ENTRY(__wcschr_vx)
+ENTRY(WCSCHR_Z13)
.machine "z13"
.machinemode "zarch_nohighgprs"
@@ -98,6 +99,17 @@ ENTRY(__wcschr_vx)
lghi %r2,0 /* Return null if character not found. */
br %r14
.Lfallback:
- jg __wcschr_c
-END(__wcschr_vx)
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+ jg WCSCHR_C
+END(WCSCHR_Z13)
+
+# if ! HAVE_WCSCHR_IFUNC
+strong_alias (WCSCHR_Z13, __wcschr)
+weak_alias (__wcschr, wcschr)
+# endif
+
+# if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT \
+ && defined SHARED && IS_IN (libc)
+strong_alias (WCSCHR_Z13, __GI___wcschr)
+weak_alias (WCSCHR_Z13, __GI_wcschr)
+# endif
+#endif
diff --git a/sysdeps/s390/multiarch/wcschr.c b/sysdeps/s390/wcschr.c
similarity index 71%
rename from sysdeps/s390/multiarch/wcschr.c
rename to sysdeps/s390/wcschr.c
index f44138f771f9f9cb..9923864ff8f5ef1f 100644
--- a/sysdeps/s390/multiarch/wcschr.c
+++ b/sysdeps/s390/wcschr.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-wcschr.h>
+
+#if HAVE_WCSCHR_IFUNC
# define wcschr __redirect_wcschr
# define __wcschr __redirect___wcschr
# include <wchar.h>
@@ -24,9 +26,18 @@
# undef __wcschr
# include <ifunc-resolve.h>
-s390_vx_libc_ifunc_redirected (__redirect___wcschr, __wcschr)
-weak_alias (__wcschr, wcschr)
+# if HAVE_WCSCHR_C
+extern __typeof (__redirect___wcschr) WCSCHR_C attribute_hidden;
+# endif
-#else
-# include <wcsmbs/wcschr.c>
-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
+# if HAVE_WCSCHR_Z13
+extern __typeof (__redirect___wcschr) WCSCHR_Z13 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__redirect___wcschr, __wcschr,
+ (HAVE_WCSCHR_Z13 && (hwcap & HWCAP_S390_VX))
+ ? WCSCHR_Z13
+ : WCSCHR_DEFAULT
+ )
+weak_alias (__wcschr, wcschr)
+#endif
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