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objtool: Stop UNRET validation on UD2

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In preparation for simplifying INSN_SYSCALL, make validate_unret()
terminate control flow on UD2 just like validate_branch() already does.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/ce841269e7e28c8b7f32064464a9821034d724ff.1744095216.git.jpoimboe@kernel.org
This commit is contained in:
Josh Poimboeuf 2025-04-08 00:02:15 -07:00 committed by Ingo Molnar
parent fe1042b1ef
commit 9f9cc012c2
1 changed files with 3 additions and 0 deletions
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3
tools/objtool/check.c
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@ -3902,6 +3902,9 @@ static int validate_unret(struct objtool_file *file, struct instruction *insn)
break;
}
if (insn->dead_end)
return 0;
if (!next) {
WARN_INSN(insn, "teh end!");
return 1;