arm64: asm: Override SYM_FUNC_START when building the kernel with BTI

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When the kernel is built for BTI override SYM_FUNC_START and related macros
to add a BTI landing pad to the start of all global functions, ensuring that
they are BTI safe. The ; at the end of the BTI_x macros is for the
benefit of the macro-generated functions in xen-hypercall.S.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20200506195138.22086-4-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

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Mark Brown 2020-05-06 20:51:30 +01:00 • committed by Will Deacon

parent 92e2294d87

commit 714a8d02ca

1 changed files with 46 additions and 0 deletions

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arch/arm64/include/asm/linkage.h

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