From: Kees Cook Date: Wed, 2 Sep 2020 02:53:43 +0000 (-0700) Subject: arm64/build: Warn on orphan section placement X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b3e5d80d0c48c0cc7bce56473672f4e6e1210910;p=linux.git 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 Signed-off-by: Ingo Molnar Acked-by: Will Deacon Reviewed-by: Nick Desaulniers Link: https://lore.kernel.org/r/20200902025347.2504702-2-keescook@chromium.org --- diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 6de7f551b8211..081144fcc3da2 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)