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[v7,3/5] arm/boot: Warn on orphan section placement

Message ID 20200902025347.2504702-4-keescook@chromium.org (mailing list archive)
State New, archived
Headers show
Series Warn on orphan section placement | expand

Commit Message

Kees Cook Sept. 2, 2020, 2:53 a.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.

With all sections now handled, enable orphan section warning.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
 arch/arm/boot/compressed/Makefile | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index b1147b7f2c8d..58028abd05d9 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -123,6 +123,8 @@  endif
 LDFLAGS_vmlinux += --no-undefined
 # Delete all temporary local symbols
 LDFLAGS_vmlinux += -X
+# Report orphan sections
+LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
 # Next argument is a linker script
 LDFLAGS_vmlinux += -T