diff options
| author | dann <dann@xtensa-linux.org> | 2008-05-21 20:43:50 -0400 |
|---|---|---|
| committer | Chris Zankel <chris@zankel.net> | 2013-02-23 22:22:54 -0500 |
| commit | e6ffe17ec45dd763ee8278246a112562f64a4ef2 (patch) | |
| tree | 3efe66a318764e0aeab4385eb407ec597f1f9f9b /arch/xtensa/kernel/entry.S | |
| parent | 2d6f82fee45a52359012948306587eba704cf35b (diff) | |
xtensa: add support for oprofile
Support call graph profiling.
Keep upper two bits of PC unchanged through backtrace rather than take
them from sp (a1). The stack pointer is usually in the same GB (same
upper 2 bits) as PC, but technically doesn't always have to be (and
might not in the future, when taking full advantage of MMU v3).
Signed-off-by: Dan Nicolaescu <dann@xtensa-linux.org>
Signed-off-by: Pete Delaney <piet@tensilica.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/kernel/entry.S')
| -rw-r--r-- | arch/xtensa/kernel/entry.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index 0ace2acbbad0..70d5a9e33573 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S | |||
| @@ -399,7 +399,7 @@ common_exception: | |||
| 399 | callx4 a4 | 399 | callx4 a4 |
| 400 | 400 | ||
| 401 | /* Jump here for exception exit */ | 401 | /* Jump here for exception exit */ |
| 402 | 402 | .global common_exception_return | |
| 403 | common_exception_return: | 403 | common_exception_return: |
| 404 | 404 | ||
| 405 | /* Jump if we are returning from kernel exceptions. */ | 405 | /* Jump if we are returning from kernel exceptions. */ |