From: Kees Cook Date: Wed, 2 Sep 2020 02:53:47 +0000 (-0700) Subject: x86/boot/compressed: Warn on orphan section placement X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6e0bf0e0e55000742a53c5f3b58f8669e0091a11;p=linux.git x86/boot/compressed: 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/20200902025347.2504702-6-keescook@chromium.org --- diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index 5b7f6e175b03a..871cc071c925d 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -54,6 +54,7 @@ KBUILD_LDFLAGS += $(call ld-option,--no-ld-generated-unwind-info) # Compressed kernel should be built as PIE since it may be loaded at any # address by the bootloader. LDFLAGS_vmlinux := -pie $(call ld-option, --no-dynamic-linker) +LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn) LDFLAGS_vmlinux += -T hostprogs := mkpiggy