diff options
| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2017-09-18 21:43:37 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-09-28 09:39:04 +0200 |
| commit | 2704fbb672d0d9a19414907fda7949283dcef6a1 (patch) | |
| tree | ace300ec47e25c9884e8c8d2391c3a20cc43b3a2 /tools/objtool | |
| parent | abbe1cac6214d81d2f4e149aba64a8760703144e (diff) | |
x86/head: Add unwind hint annotations
Jiri Slaby reported an ORC issue when unwinding from an idle task. The
stack was:
ffffffff811083c2 do_idle+0x142/0x1e0
ffffffff8110861d cpu_startup_entry+0x5d/0x60
ffffffff82715f58 start_kernel+0x3ff/0x407
ffffffff827153e8 x86_64_start_kernel+0x14e/0x15d
ffffffff810001bf secondary_startup_64+0x9f/0xa0
The ORC unwinder errored out at secondary_startup_64 because the head
code isn't annotated yet so there wasn't a corresponding ORC entry.
Fix that and any other head-related unwinding issues by adding unwind
hints to the head code.
Reported-by: Jiri Slaby <jslaby@suse.cz>
Tested-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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/78ef000a2f68f545d6eef44ee912edceaad82ccf.1505764066.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/objtool')
0 files changed, 0 insertions, 0 deletions