This is the mail archive of the
glibc-cvs@sourceware.org
mailing list for the glibc project.
GNU C Library master sources branch hjl/ifunc/c created. glibc-2.25-375-ga89f56e
- From: hjl at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 30 May 2017 16:26:06 -0000
- Subject: GNU C Library master sources branch hjl/ifunc/c created. glibc-2.25-375-ga89f56e
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU C Library master sources".
The branch, hjl/ifunc/c has been created
at a89f56e004bd30a38248b44632628db9088a79da (commit)
- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=a89f56e004bd30a38248b44632628db9088a79da
commit a89f56e004bd30a38248b44632628db9088a79da
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue May 30 08:49:36 2017 -0700
x86-64: Add memmove.h
diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile
index 3736f54..8a6ff00 100644
--- a/sysdeps/x86_64/multiarch/Makefile
+++ b/sysdeps/x86_64/multiarch/Makefile
@@ -19,6 +19,7 @@ sysdep_routines += strncat-c stpncpy-c strncpy-c strcmp-ssse3 \
strchr-sse2-no-bsf memcmp-ssse3 strstr-sse2-unaligned \
strcspn-c strpbrk-c strspn-c varshift \
memset-avx512-no-vzeroupper \
+ memmove-sse2-unaligned-erms \
memmove-avx-unaligned-erms \
memmove-avx512-unaligned-erms \
memset-avx2-unaligned-erms \
diff --git a/sysdeps/x86_64/multiarch/memcpy.S b/sysdeps/x86_64/multiarch/memcpy.S
deleted file mode 100644
index af27703..0000000
--- a/sysdeps/x86_64/multiarch/memcpy.S
+++ /dev/null
@@ -1,75 +0,0 @@
-/* Multiple versions of memcpy
- All versions must be listed in ifunc-impl-list.c.
- Copyright (C) 2010-2017 Free Software Foundation, Inc.
- Contributed by Intel Corporation.
- 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 <sysdep.h>
-#include <init-arch.h>
-
-/* Define multiple versions only for the definition in lib and for
- DSO. In static binaries we need memcpy before the initialization
- happened. */
-#if defined SHARED && IS_IN (libc)
- .text
-ENTRY(__new_memcpy)
- .type __new_memcpy, @gnu_indirect_function
- LOAD_RTLD_GLOBAL_RO_RDX
- lea __memcpy_erms(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Prefer_ERMS)
- jnz 2f
- HAS_ARCH_FEATURE (Prefer_No_AVX512)
- jnz 1f
- HAS_ARCH_FEATURE (AVX512F_Usable)
- jz 1f
- lea __memcpy_avx512_no_vzeroupper(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
- jnz 2f
- lea __memcpy_avx512_unaligned_erms(%rip), %RAX_LP
- HAS_CPU_FEATURE (ERMS)
- jnz 2f
- lea __memcpy_avx512_unaligned(%rip), %RAX_LP
- ret
-1: lea __memcpy_avx_unaligned(%rip), %RAX_LP
- HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
- jz L(Fast_Unaligned_Load)
- HAS_CPU_FEATURE (ERMS)
- jz 2f
- lea __memcpy_avx_unaligned_erms(%rip), %RAX_LP
- ret
-L(Fast_Unaligned_Load):
- lea __memcpy_sse2_unaligned(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Fast_Unaligned_Copy)
- jz L(SSSE3)
- HAS_CPU_FEATURE (ERMS)
- jz 2f
- lea __memcpy_sse2_unaligned_erms(%rip), %RAX_LP
- ret
-L(SSSE3):
- HAS_CPU_FEATURE (SSSE3)
- jz 2f
- lea __memcpy_ssse3_back(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Fast_Copy_Backward)
- jnz 2f
- lea __memcpy_ssse3(%rip), %RAX_LP
-2: ret
-END(__new_memcpy)
-
-# undef memcpy
-# include <shlib-compat.h>
-versioned_symbol (libc, __new_memcpy, memcpy, GLIBC_2_14);
-#endif
diff --git a/sysdeps/x86_64/multiarch/memcpy.c b/sysdeps/x86_64/multiarch/memcpy.c
new file mode 100644
index 0000000..223be97
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/memcpy.c
@@ -0,0 +1,37 @@
+/* Multiple versions of memcpy.
+ All versions must be listed in ifunc-impl-list.c.
+ Copyright (C) 2017 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/>. */
+
+/* Define multiple versions only for the definition in lib and for
+ DSO. In static binaries we need memcpy before the initialization
+ happened. */
+#if defined SHARED && IS_IN (libc)
+# define memcpy __redirect_memcpy
+# include <string.h>
+# undef memcpy
+
+# define SYMBOL_NAME memcpy
+# include "memmove.h"
+
+extern __typeof (__redirect_memcpy) __new_memcpy;
+
+libc_ifunc (__new_memcpy, IFUNC_SELECTOR ());
+
+# include <shlib-compat.h>
+versioned_symbol (libc, __new_memcpy, memcpy, GLIBC_2_14);
+#endif
diff --git a/sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S
new file mode 100644
index 0000000..9391580
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S
@@ -0,0 +1,48 @@
+/* memmove with SSE2.
+ Copyright (C) 2017 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 IS_IN (libc)
+# define MEMMOVE_SYMBOL(p,s) p##_sse2_##s
+
+# ifdef SHARED
+libc_hidden_ver (__memmove_sse2_unaligned, memmove)
+libc_hidden_ver (__memcpy_sse2_unaligned, memcpy)
+libc_hidden_ver (__mempcpy_sse2_unaligned, mempcpy)
+libc_hidden_ver (__mempcpy_sse2_unaligned, __mempcpy)
+
+# undef libc_hidden_builtin_def
+/* It doesn't make sense to send libc-internal memmove calls through a PLT.
+ The speedup we get from using SSE2 instructions is likely eaten away
+ by the indirect call in the PLT. */
+# define libc_hidden_builtin_def
+# endif
+#endif
+
+#if !defined SHARED || !IS_IN (libc)
+weak_alias (__mempcpy, mempcpy)
+#endif
+
+#include "../memmove.S"
+
+#if defined SHARED && IS_IN (libc)
+# include <shlib-compat.h>
+# if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
+/* Use __memmove_sse2_unaligned to support overlapping addresses. */
+compat_symbol (libc, __memmove_sse2_unaligned, memcpy, GLIBC_2_2_5);
+# endif
+#endif
diff --git a/sysdeps/x86_64/multiarch/memmove.S b/sysdeps/x86_64/multiarch/memmove.S
deleted file mode 100644
index 8c534e8..0000000
--- a/sysdeps/x86_64/multiarch/memmove.S
+++ /dev/null
@@ -1,101 +0,0 @@
-/* Multiple versions of memmove
- All versions must be listed in ifunc-impl-list.c.
- Copyright (C) 2016-2017 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 <sysdep.h>
-#include <init-arch.h>
-
-/* Define multiple versions only for the definition in lib and for
- DSO. */
-#if IS_IN (libc)
- .text
-ENTRY(__libc_memmove)
- .type __libc_memmove, @gnu_indirect_function
- LOAD_RTLD_GLOBAL_RO_RDX
- lea __memmove_erms(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Prefer_ERMS)
- jnz 2f
- HAS_ARCH_FEATURE (Prefer_No_AVX512)
- jnz 1f
- HAS_ARCH_FEATURE (AVX512F_Usable)
- jz 1f
- lea __memmove_avx512_no_vzeroupper(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
- jnz 2f
- lea __memmove_avx512_unaligned_erms(%rip), %RAX_LP
- HAS_CPU_FEATURE (ERMS)
- jnz 2f
- lea __memmove_avx512_unaligned(%rip), %RAX_LP
- ret
-1: lea __memmove_avx_unaligned(%rip), %RAX_LP
- HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
- jz L(Fast_Unaligned_Load)
- HAS_CPU_FEATURE (ERMS)
- jz 2f
- lea __memmove_avx_unaligned_erms(%rip), %RAX_LP
- ret
-L(Fast_Unaligned_Load):
- lea __memmove_sse2_unaligned(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Fast_Unaligned_Copy)
- jz L(SSSE3)
- HAS_CPU_FEATURE (ERMS)
- jz 2f
- lea __memmove_sse2_unaligned_erms(%rip), %RAX_LP
- ret
-L(SSSE3):
- HAS_CPU_FEATURE (SSSE3)
- jz 2f
- lea __memmove_ssse3_back(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Fast_Copy_Backward)
- jnz 2f
- lea __memmove_ssse3(%rip), %RAX_LP
-2: ret
-END(__libc_memmove)
-#endif
-
-#if IS_IN (libc)
-# define MEMMOVE_SYMBOL(p,s) p##_sse2_##s
-
-# ifdef SHARED
-libc_hidden_ver (__memmove_sse2_unaligned, memmove)
-libc_hidden_ver (__memcpy_sse2_unaligned, memcpy)
-libc_hidden_ver (__mempcpy_sse2_unaligned, mempcpy)
-libc_hidden_ver (__mempcpy_sse2_unaligned, __mempcpy)
-
-# undef libc_hidden_builtin_def
-/* It doesn't make sense to send libc-internal memmove calls through a PLT.
- The speedup we get from using SSE2 instructions is likely eaten away
- by the indirect call in the PLT. */
-# define libc_hidden_builtin_def
-# endif
-strong_alias (__libc_memmove, memmove)
-#endif
-
-#if !defined SHARED || !IS_IN (libc)
-weak_alias (__mempcpy, mempcpy)
-#endif
-
-#include "../memmove.S"
-
-#if defined SHARED && IS_IN (libc)
-# include <shlib-compat.h>
-# if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
-/* Use __memmove_sse2_unaligned to support overlapping addresses. */
-compat_symbol (libc, __memmove_sse2_unaligned, memcpy, GLIBC_2_2_5);
-# endif
-#endif
diff --git a/sysdeps/x86_64/multiarch/memmove.c b/sysdeps/x86_64/multiarch/memmove.c
new file mode 100644
index 0000000..e408d38
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/memmove.c
@@ -0,0 +1,34 @@
+/* Multiple versions of memmmove.
+ All versions must be listed in ifunc-impl-list.c.
+ Copyright (C) 2016-2017 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/>. */
+
+/* Define multiple versions only for the definition in lib and for
+ DSO. */
+#if IS_IN (libc)
+# define memmove __redirect_memmove
+# include <string.h>
+# undef memmove
+
+# define SYMBOL_NAME memmove
+# include "memmove.h"
+
+extern __typeof (__redirect_memmove) __libc_memmove;
+
+libc_ifunc (__libc_memmove, IFUNC_SELECTOR ());
+strong_alias (__libc_memmove, memmove);
+#endif
diff --git a/sysdeps/x86_64/multiarch/memmove.h b/sysdeps/x86_64/multiarch/memmove.h
new file mode 100644
index 0000000..0ef979b
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/memmove.h
@@ -0,0 +1,95 @@
+/* Common definition for memcpy, mempcpy, and memmove implementation.
+ All versions must be listed in ifunc-impl-list.c.
+ Copyright (C) 2016-2017 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/>. */
+
+/* memcpy, mempcpy, and memmove share the same logic for ifunc selection. */
+
+#include <cpu-features.h>
+#include <ldsodefs.h>
+
+#define PASTER1(x,y) x##_##y
+#define EVALUATOR1(x,y) PASTER1 (x,y)
+#define PASTER2(x,y) __##x##_##y
+#define EVALUATOR2(x,y) PASTER2 (x,y)
+
+/* Basically set '__redirect_<symbol>' to use as type definition,
+ '__<symbol>_<variant>' as the optimized implementation and
+ '<symbol>_ifunc_selector' as the IFUNC selector. */
+#define REDIRECT_NAME EVALUATOR1 (__redirect, SYMBOL_NAME)
+#define OPTIMIZE(name) EVALUATOR2 (SYMBOL_NAME, name)
+#define IFUNC_SELECTOR EVALUATOR1 (SYMBOL_NAME, ifunc_selector)
+
+extern __typeof (REDIRECT_NAME) OPTIMIZE (erms) attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned)
+ attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned_erms)
+ attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3_back) attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (avx_unaligned) attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (avx_unaligned_erms)
+ attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned)
+ attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned_erms)
+ attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_no_vzeroupper)
+ attribute_hidden;
+
+static inline void *
+IFUNC_SELECTOR (void)
+{
+ const struct cpu_features* cpu_features = __get_cpu_features ();
+
+ if (CPU_FEATURES_ARCH_P (cpu_features, Prefer_ERMS))
+ return OPTIMIZE (erms);
+
+ if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable)
+ && !CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_AVX512))
+ {
+ if (CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER))
+ return OPTIMIZE (avx512_no_vzeroupper);
+
+ if (CPU_FEATURES_CPU_P (cpu_features, ERMS))
+ return OPTIMIZE (avx512_unaligned_erms);
+
+ return OPTIMIZE (avx512_unaligned);
+ }
+
+ if (CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load))
+ {
+ if (CPU_FEATURES_CPU_P (cpu_features, ERMS))
+ return OPTIMIZE (avx_unaligned_erms);
+
+ return OPTIMIZE (avx_unaligned);
+ }
+
+ if (!CPU_FEATURES_CPU_P (cpu_features, SSSE3)
+ || CPU_FEATURES_ARCH_P (cpu_features, Fast_Unaligned_Copy))
+ {
+ if (CPU_FEATURES_CPU_P (cpu_features, ERMS))
+ return OPTIMIZE (sse2_unaligned_erms);
+
+ return OPTIMIZE (sse2_unaligned);
+ }
+
+ if (CPU_FEATURES_ARCH_P (cpu_features, Fast_Copy_Backward))
+ return OPTIMIZE (ssse3_back);
+
+ return OPTIMIZE (ssse3);
+}
diff --git a/sysdeps/x86_64/multiarch/mempcpy.S b/sysdeps/x86_64/multiarch/mempcpy.S
deleted file mode 100644
index b8b2b28..0000000
--- a/sysdeps/x86_64/multiarch/mempcpy.S
+++ /dev/null
@@ -1,73 +0,0 @@
-/* Multiple versions of mempcpy
- All versions must be listed in ifunc-impl-list.c.
- Copyright (C) 2010-2017 Free Software Foundation, Inc.
- Contributed by Intel Corporation.
- 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 <sysdep.h>
-#include <init-arch.h>
-
-/* Define multiple versions only for the definition in lib and for
- DSO. In static binaries we need mempcpy before the initialization
- happened. */
-#if defined SHARED && IS_IN (libc)
- .text
-ENTRY(__mempcpy)
- .type __mempcpy, @gnu_indirect_function
- LOAD_RTLD_GLOBAL_RO_RDX
- lea __mempcpy_erms(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Prefer_ERMS)
- jnz 2f
- HAS_ARCH_FEATURE (Prefer_No_AVX512)
- jnz 1f
- HAS_ARCH_FEATURE (AVX512F_Usable)
- jz 1f
- lea __mempcpy_avx512_no_vzeroupper(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
- jnz 2f
- lea __mempcpy_avx512_unaligned_erms(%rip), %RAX_LP
- HAS_CPU_FEATURE (ERMS)
- jnz 2f
- lea __mempcpy_avx512_unaligned(%rip), %RAX_LP
- ret
-1: lea __mempcpy_avx_unaligned(%rip), %RAX_LP
- HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
- jz L(Fast_Unaligned_Load)
- HAS_CPU_FEATURE (ERMS)
- jz 2f
- lea __mempcpy_avx_unaligned_erms(%rip), %RAX_LP
- ret
-L(Fast_Unaligned_Load):
- lea __mempcpy_sse2_unaligned(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Fast_Unaligned_Copy)
- jz L(SSSE3)
- HAS_CPU_FEATURE (ERMS)
- jz 2f
- lea __mempcpy_sse2_unaligned_erms(%rip), %RAX_LP
- ret
-L(SSSE3):
- HAS_CPU_FEATURE (SSSE3)
- jz 2f
- lea __mempcpy_ssse3_back(%rip), %RAX_LP
- HAS_ARCH_FEATURE (Fast_Copy_Backward)
- jnz 2f
- lea __mempcpy_ssse3(%rip), %RAX_LP
-2: ret
-END(__mempcpy)
-
-weak_alias (__mempcpy, mempcpy)
-#endif
diff --git a/sysdeps/x86_64/multiarch/mempcpy.c b/sysdeps/x86_64/multiarch/mempcpy.c
new file mode 100644
index 0000000..12422bf
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/mempcpy.c
@@ -0,0 +1,35 @@
+/* Multiple versions of mempcpy.
+ All versions must be listed in ifunc-impl-list.c.
+ Copyright (C) 2017 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/>. */
+
+/* Define multiple versions only for the definition in lib and for
+ DSO. In static binaries we need mempcpy before the initialization
+ happened. */
+#if defined SHARED && IS_IN (libc)
+# define mempcpy __redirect_mempcpy
+# define __mempcpy __redirect___mempcpy
+# include <string.h>
+# undef mempcpy
+# undef __mempcpy
+
+# define SYMBOL_NAME mempcpy
+# include "memmove.h"
+
+libc_ifunc_redirected (__redirect_mempcpy, __mempcpy, IFUNC_SELECTOR ());
+weak_alias (__mempcpy, mempcpy)
+#endif
-----------------------------------------------------------------------
hooks/post-receive
--
GNU C Library master sources