[PATCH v7 1/5] arm64/build: Warn on orphan section placement
From: Kees Cook <hidden>
Date: 2020-09-02 02:54:28
Also in:
linux-arch, linux-efi, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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. Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Kees Cook <redacted> --- arch/arm64/Makefile | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 6de7f551b821..081144fcc3da 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile@@ -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)
--
2.25.1
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