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Commit bfaeb591 authored by Gabor Kertesz's avatar Gabor Kertesz Committed by Szabolcs Nagy
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ARMv8.5 MTE: Add MTE compatible version of strrchr. 

Reading outside the range of the string is only allowed within
16 byte aligned granules when MTE is enabled.

This implementation is based on string/aarch64/strrchr.S.

Testing done:
optimized-routines/string/test/strrchr.c
Booted nanodroid with MTE enabled.
Bionic string tests with MTE enabled.
Big endian with Qemu: qemu-aarch64_be
parent 878eb93f
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