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| author | H.J. Lu <hjl.tools@gmail.com> | 2016-03-08 10:57:31 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-03-11 07:47:11 -0800 |
| commit | b4456470a64a1e4e466a98dca3b51bf63fb5a13c (patch) | |
| tree | 7f28578a5876eb172efffdd6aba45e69c33a6488 | |
| parent | 3ac64b00b596d9a7f1ab0ff8d7e191d6e01b2de7 (diff) | |
| download | glibc-b4456470a64a1e4e466a98dca3b51bf63fb5a13c.tar.gz | |
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)
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | NEWS | 1 | ||||
| -rw-r--r-- | sysdeps/x86/bits/string.h | 3 |
3 files changed, 9 insertions, 0 deletions
@@ -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] @@ -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 e4e019f1fc..8dfce052a6 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__ \ |