Commit-ID: 00d96180dc38ef872ac471c2d3e14b067cbd895d Gitweb: https://git.kernel.org/tip/00d96180dc38ef872ac471c2d3e14b067cbd895d Author: Josh Poimboeuf <[email protected]> AuthorDate: Mon, 18 Sep 2017 21:43:30 -0500 Committer: Ingo Molnar <[email protected]> CommitDate: Thu, 28 Sep 2017 09:39:02 +0200
objtool: Don't report end of section error after an empty unwind hint If asm code specifies an UNWIND_HINT_EMPTY hint, don't warn if the section ends unexpectedly. This can happen with the xen-head.S code because the hypercall_page is "text" but it's all zeros. Signed-off-by: Josh Poimboeuf <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Jiri Slaby <[email protected]> Cc: Juergen Gross <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/ddafe199dd8797e40e3c2777373347eba1d65572.1505764066.git.jpoim...@redhat.com Signed-off-by: Ingo Molnar <[email protected]> --- tools/objtool/check.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index a0c518e..83f370f 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1752,11 +1752,14 @@ static int validate_branch(struct objtool_file *file, struct instruction *first, if (insn->dead_end) return 0; - insn = next_insn; - if (!insn) { + if (!next_insn) { + if (state.cfa.base == CFI_UNDEFINED) + return 0; WARN("%s: unexpected end of section", sec->name); return 1; } + + insn = next_insn; } return 0;
