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