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3 Commits

Author SHA1 Message Date
Max Filippov
5fdf377d80 xtensa: move oprofile stack tracing to stacktrace.c 
Old oprofile interface will share user stack tracing with new perf
interface. Move oprofile user/kernel stack tracing to stacktrace.c to
make it possible.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
 2015-08-17 07:32:49 +03:00
Max Filippov
74f5bf029e xtensa: fix oprofile building as module 
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
 2013-05-09 01:07:09 -07:00
dann
e6ffe17ec4 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>
 2013-02-23 19:22:54 -08:00