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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-02-15 08:18:15 -0600 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2022-02-18 18:20:39 -0800 |
| commit | fc133fcf491d2456f72ae888ae1aff9ffa384fdf (patch) | |
| tree | d765b435f68ef0447e8e1dd8650f6883dce89a14 /sysdeps/x86_64/multiarch/strncmp-avx2.S | |
| parent | 775c05b28c1883c5860f582cca68abf9036d9ace (diff) | |
| download | glibc-fc133fcf491d2456f72ae888ae1aff9ffa384fdf.tar.gz glibc-fc133fcf491d2456f72ae888ae1aff9ffa384fdf.tar.xz glibc-fc133fcf491d2456f72ae888ae1aff9ffa384fdf.zip | |
x86: Fallback {str|wcs}cmp RTM in the ncmp overflow case [BZ #28896]
In the overflow fallback strncmp-avx2-rtm and wcsncmp-avx2-rtm would call strcmp-avx2 and wcscmp-avx2 respectively. This would have not checks around vzeroupper and would trigger spurious aborts. This commit fixes that. test-strcmp, test-strncmp, test-wcscmp, and test-wcsncmp all pass on AVX2 machines with and without RTM. Co-authored-by: H.J. Lu <hjl.tools@gmail.com> (cherry picked from commit c6272098323153db373f2986c67786ea8c85f1cf)
Diffstat (limited to 'sysdeps/x86_64/multiarch/strncmp-avx2.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strncmp-avx2.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/strncmp-avx2.S b/sysdeps/x86_64/multiarch/strncmp-avx2.S index 1678bcc235..f138e9f1fd 100644 --- a/sysdeps/x86_64/multiarch/strncmp-avx2.S +++ b/sysdeps/x86_64/multiarch/strncmp-avx2.S @@ -1,3 +1,4 @@ #define STRCMP __strncmp_avx2 #define USE_AS_STRNCMP 1 +#define OVERFLOW_STRCMP __strcmp_avx2 #include "strcmp-avx2.S" |