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399 lines
13 KiB
399 lines
13 KiB
9 months ago
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commit 914a4e05572e108201d71dcd3e47da8aeeecd70d
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Author: Stefan Liebler <stli@linux.ibm.com>
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Date: Tue Dec 18 13:57:10 2018 +0100
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S390: Refactor strcpy ifunc handling.
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The ifunc handling for strcpy 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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Note: The fallback s390-32/s390-64 ifunc variants with mvst instruction
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are now moved to the unified strcpy-z900.S file which can be used for
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31/64bit. The s390-32/s390-64 files multiarch/strcpy.c and strcpy.S
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are deleted.
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ChangeLog:
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* sysdeps/s390/multiarch/Makefile
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(sysdep_routines): Remove strcpy variants.
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* sysdeps/s390/Makefile (sysdep_routines): Add strcpy variants.
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* sysdeps/s390/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list): Refactor ifunc handling for strcpy.
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* sysdeps/s390/multiarch/strcpy-vx.S: Move to ...
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* sysdeps/s390/strcpy-vx.S: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/strcpy.c: Move to ...
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* sysdeps/s390/strcpy.c: ... here and adjust ifunc handling.
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* sysdeps/s390/ifunc-strcpy.h: New file.
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* sysdeps/s390/s390-64/strcpy.S: Move to ...
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* sysdeps/s390/strcpy-z900.S: ... here and adjust to be usable
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for 31/64bit and ifunc handling.
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* sysdeps/s390/s390-32/multiarch/strcpy.c: Delete file.
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* sysdeps/s390/s390-64/multiarch/strcpy.c: Likewise.
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* sysdeps/s390/s390-32/strcpy.S: Likewise.
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diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
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index f092355743e3908f..e4191319531ecb01 100644
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--- a/sysdeps/s390/Makefile
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+++ b/sysdeps/s390/Makefile
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@@ -38,5 +38,6 @@ sysdep_routines += bzero memset memset-z900 \
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strstr strstr-vx strstr-c \
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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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+ strnlen strnlen-vx strnlen-c \
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+ strcpy strcpy-vx strcpy-z900
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endif
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diff --git a/sysdeps/s390/ifunc-strcpy.h b/sysdeps/s390/ifunc-strcpy.h
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new file mode 100644
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index 0000000000000000..85e45556e6a61dd5
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--- /dev/null
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+++ b/sysdeps/s390/ifunc-strcpy.h
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@@ -0,0 +1,52 @@
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+/* strcpy 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_STRCPY_IFUNC 1
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+#else
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+# define HAVE_STRCPY_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_STRCPY_IFUNC_AND_VX_SUPPORT HAVE_STRCPY_IFUNC
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+#else
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+# define HAVE_STRCPY_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 STRCPY_DEFAULT STRCPY_Z13
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+# define HAVE_STRCPY_Z900_G5 0
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+# define HAVE_STRCPY_Z13 1
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+#else
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+# define STRCPY_DEFAULT STRCPY_Z900_G5
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+# define HAVE_STRCPY_Z900_G5 1
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+# define HAVE_STRCPY_Z13 HAVE_STRCPY_IFUNC_AND_VX_SUPPORT
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+#endif
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+
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+#if HAVE_STRCPY_Z900_G5
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+# define STRCPY_Z900_G5 __strcpy_default
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+#else
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+# define STRCPY_Z900_G5 NULL
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+#endif
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+
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+#if HAVE_STRCPY_Z13
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+# define STRCPY_Z13 __strcpy_vx
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+#else
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+# define STRCPY_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 35ba223c5d4fb52f..50f7f0b78df723bb 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 += strcpy strcpy-vx \
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- stpcpy stpcpy-vx stpcpy-c \
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+sysdep_routines += stpcpy stpcpy-vx stpcpy-c \
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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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diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
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index 680e5b738bfb7f32..1784372db9828463 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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@@ -28,6 +28,7 @@
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#include <ifunc-memmem.h>
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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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/* Maximum number of IFUNC implementations. */
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#define MAX_IFUNC 3
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@@ -190,6 +191,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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)
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#endif /* HAVE_STRNLEN_IFUNC */
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+#if HAVE_STRCPY_IFUNC
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+ IFUNC_IMPL (i, name, strcpy,
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+# if HAVE_STRCPY_Z13
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+ IFUNC_IMPL_ADD (array, i, strcpy,
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+ dl_hwcap & HWCAP_S390_VX, STRCPY_Z13)
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+# endif
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+# if HAVE_STRCPY_Z900_G5
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+ IFUNC_IMPL_ADD (array, i, strcpy, 1, STRCPY_Z900_G5)
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+# endif
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+ )
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+#endif /* HAVE_STRCPY_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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@@ -202,7 +215,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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IFUNC_VX_IMPL (wcsnlen);
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- IFUNC_VX_IMPL (strcpy);
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IFUNC_VX_IMPL (wcscpy);
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IFUNC_VX_IMPL (stpcpy);
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diff --git a/sysdeps/s390/s390-32/multiarch/strcpy.c b/sysdeps/s390/s390-32/multiarch/strcpy.c
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deleted file mode 100644
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index 6a22e31a03c8c1c4..0000000000000000
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--- a/sysdeps/s390/s390-32/multiarch/strcpy.c
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+++ /dev/null
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@@ -1,21 +0,0 @@
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-/* Multiple versions of strcpy.
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- Copyright (C) 2015-2018 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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-/* This wrapper-file is needed, because otherwise file
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- sysdeps/s390/s390-[32|64]/strcpy.S will be used. */
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-#include <sysdeps/s390/multiarch/strcpy.c>
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diff --git a/sysdeps/s390/s390-32/strcpy.S b/sysdeps/s390/s390-32/strcpy.S
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deleted file mode 100644
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index d49136ee92b83378..0000000000000000
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--- a/sysdeps/s390/s390-32/strcpy.S
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+++ /dev/null
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@@ -1,36 +0,0 @@
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-/* strcpy - copy a string from source to destination. For IBM S390
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- This file is part of the GNU C Library.
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- Copyright (C) 2000-2018 Free Software Foundation, Inc.
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- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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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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-/*
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- * R2 = address of destination
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- * R3 = address of source
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- */
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-
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-#include "sysdep.h"
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-#include "asm-syntax.h"
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-
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- .text
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-ENTRY(strcpy)
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- slr %r0,%r0
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- lr %r1,%r2
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-0: mvst %r1,%r3
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- jo 0b
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- br %r14
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-END(strcpy)
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-libc_hidden_builtin_def (strcpy)
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diff --git a/sysdeps/s390/s390-64/multiarch/strcpy.c b/sysdeps/s390/s390-64/multiarch/strcpy.c
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deleted file mode 100644
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index 6a22e31a03c8c1c4..0000000000000000
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--- a/sysdeps/s390/s390-64/multiarch/strcpy.c
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+++ /dev/null
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@@ -1,21 +0,0 @@
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-/* Multiple versions of strcpy.
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- Copyright (C) 2015-2018 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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-/* This wrapper-file is needed, because otherwise file
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- sysdeps/s390/s390-[32|64]/strcpy.S will be used. */
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-#include <sysdeps/s390/multiarch/strcpy.c>
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diff --git a/sysdeps/s390/multiarch/strcpy-vx.S b/sysdeps/s390/strcpy-vx.S
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similarity index 85%
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rename from sysdeps/s390/multiarch/strcpy-vx.S
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rename to sysdeps/s390/strcpy-vx.S
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index 52197f57f7b5d5cf..844d23e4fee32c9b 100644
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--- a/sysdeps/s390/multiarch/strcpy-vx.S
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+++ b/sysdeps/s390/strcpy-vx.S
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@@ -16,13 +16,13 @@
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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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-
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-# include "sysdep.h"
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-# include "asm-syntax.h"
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+#include <ifunc-strcpy.h>
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+#include "sysdep.h"
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+#include "asm-syntax.h"
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.text
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+#if HAVE_STRCPY_Z13
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/* char * strcpy (const char *dest, const char *src)
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Copy string src to dest.
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@@ -36,7 +36,7 @@
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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(__strcpy_vx)
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+ENTRY(STRCPY_Z13)
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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@@ -97,13 +97,13 @@ ENTRY(__strcpy_vx)
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.Lfound_align:
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vstl %v16,%r5,0(%r2) /* Copy characters including zero. */
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br %r14
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-END(__strcpy_vx)
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+END(STRCPY_Z13)
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-/* Use mvst-strcpy-implementation as default implementation. */
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-# define strcpy __strcpy_c
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-# undef libc_hidden_builtin_def
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-# define libc_hidden_builtin_def(name) strong_alias(__strcpy_c, __GI_strcpy)
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-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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+# if ! HAVE_STRCPY_IFUNC
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+strong_alias (STRCPY_Z13, strcpy)
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+# endif
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-/* Include mvst-strcpy-implementation in s390-32/s390-64 subdirectory. */
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-#include <strcpy.S>
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+# if ! HAVE_STRCPY_Z900_G5 && defined SHARED && IS_IN (libc)
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+strong_alias (STRCPY_Z13, __GI_strcpy)
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+# endif
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+#endif
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diff --git a/sysdeps/s390/s390-64/strcpy.S b/sysdeps/s390/strcpy-z900.S
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similarity index 66%
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rename from sysdeps/s390/s390-64/strcpy.S
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rename to sysdeps/s390/strcpy-z900.S
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index 203c73c905d0d86c..42798b1fd5c51187 100644
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||
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|
--- a/sysdeps/s390/s390-64/strcpy.S
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|
+++ b/sysdeps/s390/strcpy-z900.S
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|
@@ -1,4 +1,4 @@
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|
|
-/* strcpy - copy a string from source to destination. 64 bit S/390 version.
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|
+/* strcpy - copy a string from source to destination. 64/31 bit S/390 version.
|
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|
|
Copyright (C) 2001-2018 Free Software Foundation, Inc.
|
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|
|
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
|
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|
|
This file is part of the GNU C Library.
|
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|
|
@@ -21,15 +21,36 @@
|
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|
|
%r2 = address of destination
|
||
|
|
%r3 = address of source. */
|
||
|
|
|
||
|
|
+#include <ifunc-strcpy.h>
|
||
|
|
#include "sysdep.h"
|
||
|
|
#include "asm-syntax.h"
|
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|
|
|
||
|
|
+#if HAVE_STRCPY_Z900_G5
|
||
|
|
+# if defined __s390x__
|
||
|
|
+# define SLGR slgr
|
||
|
|
+# define LGR lgr
|
||
|
|
+# else
|
||
|
|
+# define SLGR slr
|
||
|
|
+# define LGR lr
|
||
|
|
+# endif /* ! defined __s390x__ */
|
||
|
|
+
|
||
|
|
.text
|
||
|
|
-ENTRY(strcpy)
|
||
|
|
- slgr %r0,%r0
|
||
|
|
- lgr %r1,%r2
|
||
|
|
+ENTRY(STRCPY_Z900_G5)
|
||
|
|
+ SLGR %r0,%r0
|
||
|
|
+ LGR %r1,%r2
|
||
|
|
0: mvst %r1,%r3
|
||
|
|
jo 0b
|
||
|
|
br %r14
|
||
|
|
-END(strcpy)
|
||
|
|
-libc_hidden_builtin_def (strcpy)
|
||
|
|
+END(STRCPY_Z900_G5)
|
||
|
|
+
|
||
|
|
+# undef SLGR
|
||
|
|
+# undef LGR
|
||
|
|
+
|
||
|
|
+# if ! HAVE_STRCPY_IFUNC
|
||
|
|
+strong_alias (STRCPY_Z900_G5, strcpy)
|
||
|
|
+# endif
|
||
|
|
+
|
||
|
|
+# if defined SHARED && IS_IN (libc)
|
||
|
|
+strong_alias (STRCPY_Z900_G5, __GI_strcpy)
|
||
|
|
+# endif
|
||
|
|
+#endif
|
||
|
|
diff --git a/sysdeps/s390/multiarch/strcpy.c b/sysdeps/s390/strcpy.c
|
||
|
|
similarity index 69%
|
||
|
|
rename from sysdeps/s390/multiarch/strcpy.c
|
||
|
|
rename to sysdeps/s390/strcpy.c
|
||
|
|
index 8f32a13f6730c427..f4e28e24c85b7162 100644
|
||
|
|
--- a/sysdeps/s390/multiarch/strcpy.c
|
||
|
|
+++ b/sysdeps/s390/strcpy.c
|
||
|
|
@@ -16,12 +16,25 @@
|
||
|
|
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-strcpy.h>
|
||
|
|
+
|
||
|
|
+#if HAVE_STRCPY_IFUNC
|
||
|
|
# define strcpy __redirect_strcpy
|
||
|
|
# include <string.h>
|
||
|
|
# undef strcpy
|
||
|
|
# include <ifunc-resolve.h>
|
||
|
|
|
||
|
|
-s390_vx_libc_ifunc2_redirected (__redirect_strcpy, __strcpy, strcpy)
|
||
|
|
+# if HAVE_STRCPY_Z900_G5
|
||
|
|
+extern __typeof (__redirect_strcpy) STRCPY_Z900_G5 attribute_hidden;
|
||
|
|
+# endif
|
||
|
|
+
|
||
|
|
+# if HAVE_STRCPY_Z13
|
||
|
|
+extern __typeof (__redirect_strcpy) STRCPY_Z13 attribute_hidden;
|
||
|
|
+# endif
|
||
|
|
|
||
|
|
+s390_libc_ifunc_expr (__redirect_strcpy, strcpy,
|
||
|
|
+ (HAVE_STRCPY_Z13 && (hwcap & HWCAP_S390_VX))
|
||
|
|
+ ? STRCPY_Z13
|
||
|
|
+ : STRCPY_DEFAULT
|
||
|
|
+ )
|
||
|
|
#endif
|