tree 7f3aa0f233858f04ee61872e4ae3a795433b4fa4
parent 08f87a93c8ec709698edba66a5167077181fc978
author Peter Zijlstra <peterz@infradead.org> 1646753455 +0100
committer Peter Zijlstra <peterz@infradead.org> 1647336767 +0100

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.

This removes about 1-in-4 ENDBR instructions.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154319.763643193@infradead.org