Switch to new Morello TLS ABI instead of emutls

CTSRD-CHERI / cheribsd

FreeBSD adapted for CHERI-RISC-V and Arm Morello.

http://cheribsd.org

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Switch to new Morello TLS ABI instead of emutls #1250

Closed jrtc27 closed 2 years ago

jrtc27 commented 2 years ago

Blocked on https://github.com/ARM-software/abi-aa/pull/80 stabilising as some aspects of the ABI are dubious and have unresolved feedback, so switching before it's stabilised would risk having to have a second flag day.

Will need:

rtld relocation processing
rtld resolvers implementation
Dropping -femulated-tls (and removing emutls.c + Symbol.map traces)

jrtc27 commented 2 years ago

Duplicates #1102