[tip: x86/core] objtool: Have WARN_FUNC fall back to sym+off

[tip-bot2 for Peter Zijlstra]

The following commit has been merged into the x86/core branch of tip:

Commit-ID:     5cff2086b01526b8c7deacc86473ffbab0cddfa9
Gitweb:        https://git.kernel.org/tip/5cff2086b01526b8c7deacc86473ffbab0cddfa9
Author:        Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate:    Tue, 08 Mar 2022 16:30:16 +01:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Tue, 15 Mar 2022 10:32:32 +01:00

objtool: Have WARN_FUNC fall back to sym+off

Currently WARN_FUNC() either prints func+off and failing that prints
sec+off, add an intermediate sym+off. This is useful when playing
around with entry code.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220308154317.461283840@xxxxxxxxxxxxx
---
 tools/objtool/include/objtool/warn.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/objtool/include/objtool/warn.h b/tools/objtool/include/objtool/warn.h
index d99c467..802cfda 100644
--- a/tools/objtool/include/objtool/warn.h
+++ b/tools/objtool/include/objtool/warn.h
@@ -22,6 +22,8 @@ static inline char *offstr(struct section *sec, unsigned long offset)
 	unsigned long name_off;
 
 	func = find_func_containing(sec, offset);
+	if (!func)
+		func = find_symbol_containing(sec, offset);
 	if (func) {
 		name = func->name;
 		name_off = offset - func->offset;