x86/build: Add asserts for unwanted sections (5354e845) · Commits · 戴 / test

In preparation for warning on orphan sections, enforce other expected-to-be-zero-sized sections (since discarding them might hide problems with them suddenly gaining unexpected entries). Signed-off-by:

Kees Cook <keescook@chromium.org> Signed-off-by:

Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20200821194310.3089815-25-keescook@chromium.org

arch/x86/kernel/vmlinux.lds.S

+24 −0

Original line number	Diff line number	Diff line
		@@ -427,6 +427,30 @@ SECTIONS
		SIZEOF(.got.plt) == 0xc,
		#endif
		"Unexpected GOT/PLT entries detected!")

		/*
		* Sections that should stay zero sized, which is safer to
		* explicitly check instead of blindly discarding.
		*/
		.got : {
		(.got) (.igot.*)
		}
		ASSERT(SIZEOF(.got) == 0, "Unexpected GOT entries detected!")

		.plt : {
		(.plt) (.plt.) (.iplt)
		}
		ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")

		.rel.dyn : {
		(.rel.) (.rel_)
		}
		ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) detected!")

		.rela.dyn : {
		(.rela.) (.rela_)
		}
		ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
		}

		#ifdef CONFIG_X86_32

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