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x86/build: Warn on orphan section placement

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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>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20200902025347.2504702-5-keescook@chromium.org
This commit is contained in:
Kees Cook 2020-09-01 19:53:46 -07:00 committed by Ingo Molnar
parent 4409d2f8df
commit 83109d5d5f
1 changed files with 4 additions and 0 deletions
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4
arch/x86/Makefile
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@ -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