| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 002/159] objtool: Dont report end of section error after an empty unwind hint | Date | Fri, 22 Dec 2017 09:44:47 +0100 |
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4.14-stable review patch. If anyone has any objections, please let me know.
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From: Josh Poimboeuf <jpoimboe@redhat.com>
commit 00d96180dc38ef872ac471c2d3e14b067cbd895d upstream.
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 <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/ddafe199dd8797e40e3c2777373347eba1d65572.1505764066.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- tools/objtool/check.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
--- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1757,11 +1757,14 @@ static int validate_branch(struct objtoo 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;
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