forked from mirrors/nixpkgs
24 lines
761 B
Diff
24 lines
761 B
Diff
Fix i686 memchr overflow calculation (BZ#21182)
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https://sourceware.org/git/?p=glibc.git;a=commit;h=3abeeec5f46ff03
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diff --git a/sysdeps/i386/i686/multiarch/memchr-sse2.S b/sysdeps/i386/i686/multiarch/memchr-sse2.S
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index 910679c..e41f324 100644
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--- a/sysdeps/i386/i686/multiarch/memchr-sse2.S
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+++ b/sysdeps/i386/i686/multiarch/memchr-sse2.S
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@@ -117,7 +117,6 @@ L(crosscache):
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# ifndef USE_AS_RAWMEMCHR
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jnz L(match_case2_prolog1)
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- lea -16(%edx), %edx
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/* Calculate the last acceptable address and check for possible
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addition overflow by using satured math:
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edx = ecx + edx
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@@ -125,6 +124,7 @@ L(crosscache):
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add %ecx, %edx
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sbb %eax, %eax
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or %eax, %edx
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+ sub $16, %edx
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jbe L(return_null)
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lea 16(%edi), %edi
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# else
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