46 lines
1.8 KiB
Diff
46 lines
1.8 KiB
Diff
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Index: glibc-2.13/sysdeps/x86_64/multiarch/Makefile
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===================================================================
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--- glibc-2.13.orig/sysdeps/x86_64/multiarch/Makefile
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+++ glibc-2.13/sysdeps/x86_64/multiarch/Makefile
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@@ -6,7 +6,7 @@ endif
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ifeq ($(subdir),string)
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sysdep_routines += stpncpy-c strncpy-c strcmp-ssse3 strncmp-ssse3 \
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strend-sse4 memcmp-sse4 memcpy-ssse3 mempcpy-ssse3 \
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- memmove-ssse3 memcpy-ssse3-back mempcpy-ssse3-back \
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+ memmove-ssse3 mempcpy-ssse3-back \
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memmove-ssse3-back strcasestr-nonascii strcasecmp_l-ssse3 \
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strncase_l-ssse3 strlen-sse4 strlen-no-bsf \
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memset-x86-64
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Index: glibc-2.13/sysdeps/x86_64/multiarch/memcpy.S
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===================================================================
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--- glibc-2.13.orig/sysdeps/x86_64/multiarch/memcpy.S
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+++ glibc-2.13/sysdeps/x86_64/multiarch/memcpy.S
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@@ -35,9 +35,11 @@ ENTRY(memcpy)
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testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
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jz 2f
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leaq __memcpy_ssse3(%rip), %rax
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+ /* disable backward memcpy for glibc 2.13
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testl $bit_Fast_Copy_Backward, __cpu_features+FEATURE_OFFSET+index_Fast_Copy_Backward(%rip)
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jz 2f
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leaq __memcpy_ssse3_back(%rip), %rax
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+ */
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2: ret
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END(memcpy)
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Index: glibc-2.13/sysdeps/x86_64/multiarch/memcpy_chk.S
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===================================================================
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--- glibc-2.13.orig/sysdeps/x86_64/multiarch/memcpy_chk.S
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+++ glibc-2.13/sysdeps/x86_64/multiarch/memcpy_chk.S
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@@ -36,9 +36,11 @@ ENTRY(__memcpy_chk)
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testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
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jz 2f
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leaq __memcpy_chk_ssse3(%rip), %rax
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+ /* disable backwards memcpy until glibc 2.14
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testl $bit_Fast_Copy_Backward, __cpu_features+FEATURE_OFFSET+index_Fast_Copy_Backward(%rip)
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jz 2f
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leaq __memcpy_chk_ssse3_back(%rip), %rax
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+ */
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2: ret
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END(__memcpy_chk)
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# else
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