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On aarch64, if the processor doesn't have the Crypto instructions then OpenSSL will fall back onto the "bit-sliced" assembler routines. When branch protection (BTI) was enabled in OpenSSL these routines were missed, so if BTI is available libssl will immediately abort when it enters this assembler. Backport a patch submitted upstream to add the required call target annotations so that BTI doesn't believe the code is being exploited. (From OE-Core rev: ec555688dbdc87cc695db653201c8d9e20079d22) Signed-off-by: Ross Burton <ross.burton@arm.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>