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glibc/SOURCES/glibc-rh1659438-14.patch
CentOS Sources 0d6119401b import glibc-2.28-66.el8
2021-10-08 11:23:06 +00:00

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commit 8c25dddd2e32bce47dfe01ca51c8aab535dbe23d
Author: Stefan Liebler <stli@linux.ibm.com>
Date: Tue Dec 18 13:57:09 2018 +0100
S390: Add z13 strstr ifunc variant.
The new vector variant of strstr is using the common code
implementation, but instead of calling the default
str* / mem* functions, the vector variants are called.
ChangeLog:
* sysdeps/s390/Makefile (sysdep_routines): Add strstr variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc variants for strstr.
* sysdeps/s390/ifunc-strstr.h: New file.
* sysdeps/s390/strstr.c: Likewise.
* sysdeps/s390/strstr-c.c: Likewise.
* sysdeps/s390/strstr-vx.c: Likewise.
diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 3a7cccdf8f147398..4441e7a5cf6fa167 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -34,5 +34,6 @@ ifeq ($(subdir),string)
sysdep_routines += bzero memset memset-z900 \
memcmp memcmp-z900 \
mempcpy memcpy memcpy-z900 \
- memmove memmove-c
+ memmove memmove-c \
+ strstr strstr-vx strstr-c
endif
diff --git a/sysdeps/s390/ifunc-strstr.h b/sysdeps/s390/ifunc-strstr.h
new file mode 100644
index 0000000000000000..e6ccfd4e44a1a790
--- /dev/null
+++ b/sysdeps/s390/ifunc-strstr.h
@@ -0,0 +1,52 @@
+/* strstr 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_STRSTR_IFUNC 1
+#else
+# define HAVE_STRSTR_IFUNC 0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_STRSTR_IFUNC_AND_VX_SUPPORT HAVE_STRSTR_IFUNC
+#else
+# define HAVE_STRSTR_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define STRSTR_DEFAULT STRSTR_Z13
+# define HAVE_STRSTR_C 0
+# define HAVE_STRSTR_Z13 1
+#else
+# define STRSTR_DEFAULT STRSTR_C
+# define HAVE_STRSTR_C 1
+# define HAVE_STRSTR_Z13 HAVE_STRSTR_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_STRSTR_C
+# define STRSTR_C __strstr_c
+#else
+# define STRSTR_C NULL
+#endif
+
+#if HAVE_STRSTR_Z13
+# define STRSTR_Z13 __strstr_vx
+#else
+# define STRSTR_Z13 NULL
+#endif
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index c05c63e00608dcd7..14727f8fef5431dd 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -24,6 +24,7 @@
#include <ifunc-memset.h>
#include <ifunc-memcmp.h>
#include <ifunc-memcpy.h>
+#include <ifunc-strstr.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
@@ -138,6 +139,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
)
#endif /* HAVE_MEMMOVE_IFUNC */
+#if HAVE_STRSTR_IFUNC
+ IFUNC_IMPL (i, name, strstr,
+# if HAVE_STRSTR_Z13
+ IFUNC_IMPL_ADD (array, i, strstr,
+ dl_hwcap & HWCAP_S390_VX, STRSTR_Z13)
+# endif
+# if HAVE_STRSTR_C
+ IFUNC_IMPL_ADD (array, i, strstr, 1, STRSTR_C)
+# endif
+ )
+#endif /* HAVE_STRSTR_IFUNC */
+
#ifdef HAVE_S390_VX_ASM_SUPPORT
# define IFUNC_VX_IMPL(FUNC) \
diff --git a/sysdeps/s390/strstr-c.c b/sysdeps/s390/strstr-c.c
new file mode 100644
index 0000000000000000..53717bfb276fed3d
--- /dev/null
+++ b/sysdeps/s390/strstr-c.c
@@ -0,0 +1,32 @@
+/* Default strstr implementation for S/390.
+ 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/>. */
+
+#include <ifunc-strstr.h>
+
+#if HAVE_STRSTR_C
+# if HAVE_STRSTR_IFUNC
+# define STRSTR STRSTR_C
+# if defined SHARED && IS_IN (libc)
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name) \
+ __hidden_ver1 (__strstr_c, __GI_strstr, __strstr_c);
+# endif
+# endif
+
+# include <string/strstr.c>
+#endif
diff --git a/sysdeps/s390/strstr-vx.c b/sysdeps/s390/strstr-vx.c
new file mode 100644
index 0000000000000000..effae9d5eb7d2fb1
--- /dev/null
+++ b/sysdeps/s390/strstr-vx.c
@@ -0,0 +1,52 @@
+/* Default strstr implementation with vector string functions for S/390.
+ 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/>. */
+
+#include <ifunc-strstr.h>
+
+#if HAVE_STRSTR_Z13
+# if HAVE_STRSTR_IFUNC
+# define STRSTR STRSTR_Z13
+# if defined SHARED && IS_IN (libc)
+# undef libc_hidden_builtin_def
+# if HAVE_STRSTR_C
+# define libc_hidden_builtin_def(name)
+# else
+# define libc_hidden_builtin_def(name) \
+ __hidden_ver1 (__strstr_vx, __GI_strstr, __strstr_vx);
+# endif
+# endif
+# endif
+
+# include <string.h>
+
+# ifdef USE_MULTIARCH
+extern __typeof (strchr) __strchr_vx attribute_hidden;
+# define strchr __strchr_vx
+
+extern __typeof (strlen) __strlen_vx attribute_hidden;
+# define strlen __strlen_vx
+
+extern __typeof (__strnlen) __strnlen_vx attribute_hidden;
+# define __strnlen __strnlen_vx
+
+extern __typeof (memcmp) __memcmp_z196 attribute_hidden;
+# define memcmp __memcmp_z196
+# endif
+
+# include <string/strstr.c>
+#endif
diff --git a/sysdeps/s390/strstr.c b/sysdeps/s390/strstr.c
new file mode 100644
index 0000000000000000..f8432349a7254cc6
--- /dev/null
+++ b/sysdeps/s390/strstr.c
@@ -0,0 +1,40 @@
+/* Multiple versions of strstr.
+ 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/>. */
+
+#include <ifunc-strstr.h>
+
+#if HAVE_STRSTR_IFUNC
+# define strstr __redirect_strstr
+# include <string.h>
+# include <ifunc-resolve.h>
+# undef strstr
+
+# if HAVE_STRSTR_C
+extern __typeof (__redirect_strstr) STRSTR_C attribute_hidden;
+# endif
+
+# if HAVE_STRSTR_Z13
+extern __typeof (__redirect_strstr) STRSTR_Z13 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__redirect_strstr, strstr,
+ (HAVE_STRSTR_Z13 && (hwcap & HWCAP_S390_VX))
+ ? STRSTR_Z13
+ : STRSTR_DEFAULT
+ )
+#endif
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