Commit b3e5d80d authored Sep 01, 2020 by Kees Cook Committed by Ingo Molnar Sep 03, 2020

arm64/build: Warn on orphan section placement



We don't want to depend on the linker's orphan section placement
heuristics as these can vary between linkers, and may change between
versions. All sections need to be explicitly handled in the linker
script.

With all sections now handled, enable orphan section warnings.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20200902025347.2504702-2-keescook@chromium.org

parent 414d2ff5

arch/arm64/Makefile

+4 −0

Original line number	Diff line number	Diff line
		@@ -29,6 +29,10 @@ LDFLAGS_vmlinux += --fix-cortex-a53-843419
		endif
		endif

		# We never want expected sections to be placed heuristically by the
		# linker. All sections should be explicitly named in the linker script.
		LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)

		ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS), y)
		ifneq ($(CONFIG_ARM64_LSE_ATOMICS), y)
		$(warning LSE atomics not supported by binutils)

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