[PATCH 2/2] objtool: Ignore unwind hints for ignored functions

Josh Poimboeuf
2021-07-10T19:25:14Z

If a function is ignored, also ignore its hints. This is useful for the
case where the function ignore is conditional on frame pointers, e.g.
STACK_FRAME_NON_STANDARD_FP().

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
---
tools/objtool/check.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index e5947fbb9e7a..67cbdcfcabae 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2909,7 +2909,7 @@ static int validate_unwind_hints(struct objtool_file *file, struct section *sec)
}

while (&insn->list != &file->insn_list && (!sec || insn->sec = sec)) {
- if (insn->hint && !insn->visited) {
+ if (insn->hint && !insn->visited && !insn->ignore) {
ret = validate_branch(file, insn->func, insn, state);
if (ret && backtrace)
BT_FUNC("<== (hint)", insn);
--
2.31.1