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GNU C Library master sources branch release/2.23/master updated. glibc-2.23-14-gb445647
- From: hjl at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 11 Mar 2016 16:13:49 -0000
- Subject: GNU C Library master sources branch release/2.23/master updated. glibc-2.23-14-gb445647
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=b4456470a64a1e4e466a98dca3b51bf63fb5a13c
commit b4456470a64a1e4e466a98dca3b51bf63fb5a13c
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Mar 8 10:57:31 2016 -0800
Define _HAVE_STRING_ARCH_mempcpy to 1 for x86
Since x86 has an optimized mempcpy and GCC can inline mempcpy on x86,
define _HAVE_STRING_ARCH_mempcpy to 1 for x86.
[BZ #19759]
* sysdeps/x86/bits/string.h (_HAVE_STRING_ARCH_mempcpy): New.
(cherry picked from commit 2b35e48c0c547b3f6f81996ce7ad7d67e24c7329)
diff --git a/ChangeLog b/ChangeLog
index 1417e38..a539098 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-03-11 H.J. Lu <hongjiu.lu@intel.com>
+
+ [BZ #19759]
+ * sysdeps/x86/bits/string.h (_HAVE_STRING_ARCH_mempcpy): New.
+
2016-03-10 H.J. Lu <hongjiu.lu@intel.com>
[BZ #19762]
diff --git a/NEWS b/NEWS
index 1b67919..663c716 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,7 @@ Security related changes:
The following bugs are resolved with this release:
[19679] gcc-4.9.3 C++ exception handling broken due to unaligned stack
+ [19759] Don't inline mempcpy for x86
[19762] Use HAS_ARCH_FEATURE with Fast_Rep_String
[19792] MIPS: backtrace yields infinite backtrace with makecontext
diff --git a/sysdeps/x86/bits/string.h b/sysdeps/x86/bits/string.h
index e4e019f..8dfce05 100644
--- a/sysdeps/x86/bits/string.h
+++ b/sysdeps/x86/bits/string.h
@@ -23,6 +23,9 @@
/* Use the unaligned string inline ABI. */
#define _STRING_INLINE_unaligned 1
+/* Don't inline mempcpy into memcpy as x86 has an optimized mempcpy. */
+#define _HAVE_STRING_ARCH_mempcpy 1
+
/* Enable inline functions only for i486 or better when compiling for
ia32. */
#if !defined __x86_64__ && (defined __i486__ || defined __pentium__ \
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 5 +++++
NEWS | 1 +
sysdeps/x86/bits/string.h | 3 +++
3 files changed, 9 insertions(+), 0 deletions(-)
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