tree 665a397bec53bba27a037d0e4d10bb067558a9e3
parent 5f41bf7bfe7d6447fa6dfb2287152aeabc01ca57
author Nick Desaulniers <ndesaulniers@google.com> 1607112270 -0800
committer Nick Desaulniers <ndesaulniers@google.com> 1607372218 -0800

ANDROID: configs: GKI: disable ARMv8.3 PAC

Moving to LLVM_IAS=1 allows for us to now emit instructions making use
of the ARMv8.3 extension Pointer Authentication (PAC), which is enabled
by default by Kconfig if the tooling supports it.

PAC has implications for DWARF based unwinders, see section 4.1.8 of
https://github.com/ARM-software/abi-aa/blob/master/aadwarf64/aadwarf64.rst#dwarf-register-names.

Disable PAC for now until all of our DWARF based unwinders support
unwinding kernels built with PAC, particularly third party utilties that
assist with ramdump parsing.

Bug: 173653853
Bug: 174803347
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Change-Id: I4c7d9f37da7e3901de27f20bbfad4722cdb8a423