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ANDROID: configs: GKI: disable ARMv8.3 PAC

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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
This commit is contained in:
Nick Desaulniers
2020-12-04 11:06:39 -08:00
parent c3c90101e2
commit 67e762efc7
1 changed files with 1 additions and 0 deletions
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arch/arm64/configs/gki_defconfig
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@@ -58,6 +58,7 @@ CONFIG_SWP_EMULATION=y
CONFIG_CP15_BARRIER_EMULATION=y
CONFIG_SETEND_EMULATION=y
# CONFIG_ARM64_VHE is not set
# CONFIG_ARM64_PTR_AUTH is not set
CONFIG_RANDOMIZE_BASE=y
# CONFIG_RANDOMIZE_MODULE_REGION_FULL is not set
# CONFIG_DMI is not set