Peter Zijlstra 89bc853eae 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

2022-03-15 10:32:47 +01:00

..

arch.h

objtool: Add IBT/ENDBR decoding

2022-03-15 10:32:46 +01:00

builtin.h

objtool: Validate IBT assumptions

2022-03-15 10:32:46 +01:00

cfi.h

objtool: Introduce CFI hash

2021-09-15 15:51:45 +02:00

check.h

objtool: Read the NOENDBR annotation

2022-03-15 10:32:46 +01:00

elf.h

objtool: Ignore extra-symbol code

2022-03-15 10:32:43 +01:00

endianness.h

…

objtool.h

objtool: Find unused ENDBR instructions

2022-03-15 10:32:47 +01:00

special.h

objtool: Decode jump_entry::key addend

2021-05-12 14:54:55 +02:00

warn.h

objtool: Have WARN_FUNC fall back to sym+off

2022-03-15 10:32:32 +01:00