From: Kees Cook Date: Wed, 2 Sep 2020 02:53:46 +0000 (-0700) Subject: x86/build: Warn on orphan section placement X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=83109d5d5fba7abf362f5a443c9f4c4ea10bbc8d;p=linux.git x86/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. Now that all sections are explicitly handled, enable orphan section warnings. Signed-off-by: Kees Cook Signed-off-by: Ingo Molnar Reviewed-by: Nick Desaulniers Link: https://lore.kernel.org/r/20200902025347.2504702-5-keescook@chromium.org --- diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 4346ffb2e39f0..154259f18b8b9 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -209,6 +209,10 @@ ifdef CONFIG_X86_64 LDFLAGS_vmlinux += -z max-page-size=0x200000 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) + archscripts: scripts_basic $(Q)$(MAKE) $(build)=arch/x86/tools relocs