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[v6,29/29] x86/boot/compressed: Warn on orphan section placement

Message ID 20200821194310.3089815-30-keescook@chromium.org (mailing list archive)
State New, archived
Headers show
Series Warn on orphan section placement | expand

Commit Message

Kees Cook Aug. 21, 2020, 7:43 p.m. UTC 
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 <keescook@chromium.org>
---
 arch/x86/boot/compressed/Makefile | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 5b7f6e175b03..647e15837a28 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 += --orphan-handling=warn
 LDFLAGS_vmlinux += -T
 
 hostprogs	:= mkpiggy