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[v5,31/36] x86/build: Warn on orphan section placement

Message ID 20200731230820.1742553-32-keescook@chromium.org (mailing list archive)
State New, archived
Headers show
Series Warn on orphan section placement | expand

Commit Message

Kees Cook July 31, 2020, 11:08 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/Makefile | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 00e378de8bc0..f8a5b2333729 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -51,6 +51,10 @@  ifdef CONFIG_X86_NEED_RELOCS
         LDFLAGS_vmlinux := --emit-relocs --discard-none
 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 += --orphan-handling=warn
+
 #
 # Prevent GCC from generating any FP code by mistake.
 #