| Date | Thu, 17 Mar 2022 15:22:54 -0700 | From | Josh Poimboeuf <> | Subject | Re: [tip: x86/core] objtool: Find unused ENDBR instructions |
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On Tue, Mar 15, 2022 at 03:39:52PM +0000, David Laight wrote: > From: Peter Zijlstra > > > > objtool: Find unused ENDBR instructions > > > > Find all ENDBR instructions which are never referenced and stick them > > in a section such that the kernel can poison them, sealing the > > functions from ever being an indirect call target. > > Thought, what happens if the only indirect call is from > code in a module?
Then <boom>, I guess. Is it safe to assume in-tree modules don't need to do indirect calls to exported functions? I guess we'll find out :-)
-- Josh
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