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commit 970449311ded3cacb6058c96143dd4c057900589
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Author: Stefan Liebler <stli@linux.ibm.com>
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Date: Tue Dec 18 13:57:11 2018 +0100
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S390: Refactor stpcpy ifunc handling.
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The ifunc handling for stpcpy is adjusted in order to omit ifunc
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variants if those will never be used as the minimum architecture level
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already supports newer CPUs by default.
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Glibc internal calls will then also use the "newer" ifunc variant.
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ChangeLog:
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* sysdeps/s390/multiarch/Makefile
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(sysdep_routines): Remove stpcpy variants.
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* sysdeps/s390/Makefile (sysdep_routines): Add stpcpy variants.
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* sysdeps/s390/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list): Refactor ifunc handling for stpcpy.
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* sysdeps/s390/multiarch/stpcpy-c.c: Move to ...
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* sysdeps/s390/stpcpy-c.c: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/stpcpy-vx.S: Move to ...
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* sysdeps/s390/stpcpy-vx.S: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/stpcpy.c: Move to ...
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* sysdeps/s390/stpcpy.c: ... here and adjust ifunc handling.
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* sysdeps/s390/ifunc-stpcpy.h: New file.
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diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
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index e4191319531ecb01..b7e1bc8aecf2f8c9 100644
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--- a/sysdeps/s390/Makefile
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+++ b/sysdeps/s390/Makefile
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@@ -39,5 +39,6 @@ sysdep_routines += bzero memset memset-z900 \
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memmem memmem-vx memmem-c \
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strlen strlen-vx strlen-c \
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strnlen strnlen-vx strnlen-c \
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- strcpy strcpy-vx strcpy-z900
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+ strcpy strcpy-vx strcpy-z900 \
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+ stpcpy stpcpy-vx stpcpy-c
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endif
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diff --git a/sysdeps/s390/ifunc-stpcpy.h b/sysdeps/s390/ifunc-stpcpy.h
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new file mode 100644
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index 0000000000000000..9a70cd7c8c4f4582
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--- /dev/null
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+++ b/sysdeps/s390/ifunc-stpcpy.h
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@@ -0,0 +1,52 @@
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+/* stpcpy variant information on S/390 version.
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+ Copyright (C) 2018 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#if defined USE_MULTIARCH && IS_IN (libc) \
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+ && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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+# define HAVE_STPCPY_IFUNC 1
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+#else
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+# define HAVE_STPCPY_IFUNC 0
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+#endif
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+
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+#ifdef HAVE_S390_VX_ASM_SUPPORT
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+# define HAVE_STPCPY_IFUNC_AND_VX_SUPPORT HAVE_STPCPY_IFUNC
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+#else
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+# define HAVE_STPCPY_IFUNC_AND_VX_SUPPORT 0
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+#endif
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+
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+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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+# define STPCPY_DEFAULT STPCPY_Z13
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+# define HAVE_STPCPY_C 0
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+# define HAVE_STPCPY_Z13 1
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+#else
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+# define STPCPY_DEFAULT STPCPY_C
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+# define HAVE_STPCPY_C 1
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+# define HAVE_STPCPY_Z13 HAVE_STPCPY_IFUNC_AND_VX_SUPPORT
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+#endif
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+
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+#if HAVE_STPCPY_C
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+# define STPCPY_C __stpcpy_c
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+#else
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+# define STPCPY_C NULL
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+#endif
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+
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+#if HAVE_STPCPY_Z13
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+# define STPCPY_Z13 __stpcpy_vx
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+#else
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+# define STPCPY_Z13 NULL
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+#endif
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diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
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index 50f7f0b78df723bb..9517417dcbe1c701 100644
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--- a/sysdeps/s390/multiarch/Makefile
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+++ b/sysdeps/s390/multiarch/Makefile
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@@ -1,6 +1,5 @@
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ifeq ($(subdir),string)
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-sysdep_routines += stpcpy stpcpy-vx stpcpy-c \
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- strncpy strncpy-vx \
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+sysdep_routines += strncpy strncpy-vx \
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stpncpy stpncpy-vx stpncpy-c \
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strcat strcat-vx strcat-c \
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strncat strncat-vx strncat-c \
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diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
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index 1784372db9828463..678ed13833332f11 100644
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--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
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+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
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@@ -29,6 +29,7 @@
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#include <ifunc-strlen.h>
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#include <ifunc-strnlen.h>
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#include <ifunc-strcpy.h>
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+#include <ifunc-stpcpy.h>
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/* Maximum number of IFUNC implementations. */
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#define MAX_IFUNC 3
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@@ -203,6 +204,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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)
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#endif /* HAVE_STRCPY_IFUNC */
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+#if HAVE_STPCPY_IFUNC
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+ IFUNC_IMPL (i, name, stpcpy,
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+# if HAVE_STPCPY_Z13
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+ IFUNC_IMPL_ADD (array, i, stpcpy,
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+ dl_hwcap & HWCAP_S390_VX, STPCPY_Z13)
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+# endif
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+# if HAVE_STPCPY_C
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+ IFUNC_IMPL_ADD (array, i, stpcpy, 1, STPCPY_C)
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+# endif
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+ )
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+#endif /* HAVE_STPCPY_IFUNC */
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+
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define IFUNC_VX_IMPL(FUNC) \
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@@ -217,7 +230,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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IFUNC_VX_IMPL (wcscpy);
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- IFUNC_VX_IMPL (stpcpy);
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IFUNC_VX_IMPL (wcpcpy);
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IFUNC_VX_IMPL (strncpy);
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diff --git a/sysdeps/s390/multiarch/stpcpy-c.c b/sysdeps/s390/stpcpy-c.c
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similarity index 74%
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rename from sysdeps/s390/multiarch/stpcpy-c.c
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rename to sysdeps/s390/stpcpy-c.c
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index 4a1c3e5832c9b544..76ec88462717799c 100644
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--- a/sysdeps/s390/multiarch/stpcpy-c.c
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+++ b/sysdeps/s390/stpcpy-c.c
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@@ -16,20 +16,25 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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-# define STPCPY __stpcpy_c
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-# undef weak_alias
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-# define weak_alias(a, b)
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-# ifdef SHARED
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-# undef libc_hidden_def
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-# define libc_hidden_def(name) \
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+#include <ifunc-stpcpy.h>
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+
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+#if HAVE_STPCPY_C
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+# if HAVE_STPCPY_IFUNC
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+# define STPCPY STPCPY_C
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+
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+# undef weak_alias
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+# define weak_alias(a, b)
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+
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+# if defined SHARED && IS_IN (libc)
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+# undef libc_hidden_def
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+# define libc_hidden_def(name) \
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__hidden_ver1 (__stpcpy_c, __GI___stpcpy, __stpcpy_c);
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-# undef libc_hidden_builtin_def
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-# define libc_hidden_builtin_def(name) \
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+# undef libc_hidden_builtin_def
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+# define libc_hidden_builtin_def(name) \
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strong_alias (__stpcpy_c, __stpcpy_c_1); \
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__hidden_ver1 (__stpcpy_c_1, __GI_stpcpy, __stpcpy_c_1);
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-# endif /* SHARED */
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-
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+# endif
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+# endif
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# include <string/stpcpy.c>
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-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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+#endif
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diff --git a/sysdeps/s390/multiarch/stpcpy-vx.S b/sysdeps/s390/stpcpy-vx.S
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similarity index 90%
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rename from sysdeps/s390/multiarch/stpcpy-vx.S
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rename to sysdeps/s390/stpcpy-vx.S
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index 6c17def0fc35d60d..d2db02d0cd714d27 100644
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--- a/sysdeps/s390/multiarch/stpcpy-vx.S
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+++ b/sysdeps/s390/stpcpy-vx.S
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@@ -16,7 +16,9 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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+#include <ifunc-stpcpy.h>
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+
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+#if HAVE_STPCPY_Z13
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# include "sysdep.h"
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# include "asm-syntax.h"
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@@ -36,7 +38,7 @@
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-v17=index of zero
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-v18=part of src
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*/
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-ENTRY(__stpcpy_vx)
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+ENTRY(STPCPY_Z13)
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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@@ -100,5 +102,15 @@ ENTRY(__stpcpy_vx)
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vstl %v16,%r5,0(%r2) /* Copy characters including zero. */
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la %r2,0(%r5,%r2) /* Return pointer to zero. */
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br %r14
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-END(__stpcpy_vx)
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-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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+END(STPCPY_Z13)
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+
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+# if ! HAVE_STPCPY_IFUNC
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+strong_alias (STPCPY_Z13, __stpcpy)
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+weak_alias (__stpcpy, stpcpy)
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+# endif
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+
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+# if ! HAVE_STPCPY_C && defined SHARED && IS_IN (libc)
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+strong_alias (STPCPY_Z13, __GI_stpcpy)
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+strong_alias (STPCPY_Z13, __GI___stpcpy)
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+# endif
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+#endif
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diff --git a/sysdeps/s390/multiarch/stpcpy.c b/sysdeps/s390/stpcpy.c
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similarity index 74%
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rename from sysdeps/s390/multiarch/stpcpy.c
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rename to sysdeps/s390/stpcpy.c
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index 654f9dfbef512e34..670604e2de3806b7 100644
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--- a/sysdeps/s390/multiarch/stpcpy.c
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+++ b/sysdeps/s390/stpcpy.c
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@@ -16,7 +16,9 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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+#include <ifunc-stpcpy.h>
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+
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+#if HAVE_STPCPY_IFUNC
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# define stpcpy __redirect_stpcpy
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# define __stpcpy __redirect___stpcpy
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/* Omit the stpcpy inline definitions because it would redefine stpcpy. */
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@@ -27,9 +29,18 @@
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# undef __stpcpy
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# include <ifunc-resolve.h>
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-s390_vx_libc_ifunc_redirected (__redirect___stpcpy, __stpcpy);
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-weak_alias (__stpcpy, stpcpy)
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+# if HAVE_STPCPY_C
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+extern __typeof (__redirect_stpcpy) STPCPY_C attribute_hidden;
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+# endif
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-#else
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-# include <string/stpcpy.c>
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-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
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+# if HAVE_STPCPY_Z13
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+extern __typeof (__redirect_stpcpy) STPCPY_Z13 attribute_hidden;
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+# endif
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+
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bdc76f |
+s390_libc_ifunc_expr (__redirect___stpcpy, __stpcpy,
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bdc76f |
+ (HAVE_STPCPY_Z13 && (hwcap & HWCAP_S390_VX))
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bdc76f |
+ ? STPCPY_Z13
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bdc76f |
+ : STPCPY_DEFAULT
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bdc76f |
+ )
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bdc76f |
+weak_alias (__stpcpy, stpcpy)
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bdc76f |
+#endif
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