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3 Commits

Author SHA1 Message Date
Atsushi Nemoto 1924600cdb [MIPS] Make unwind_stack() can dig into interrupted context 
If the PC was ret_from_irq or ret_from_exception, there will be no
more normal stackframe.  Instead of stopping the unwinding, use PC and
RA saved by an exception handler to continue unwinding into the
interrupted context.  This also simplifies the CONFIG_STACKTRACE code.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2006-10-01 23:16:59 +01:00
Atsushi Nemoto 23126692e3 [MIPS] Stacktrace build-fix and improvement 
Fix build error due to stacktrace API change.  Now save_stack_trace()
tries to save all kernel context, including interrupts and exception.
Also some asm code are changed a bit so that we can detect the end of
current context easily.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2006-10-01 23:16:58 +01:00
Atsushi Nemoto 1df0f0ff7e [MIPS] lockdep: Add STACKTRACE_SUPPORT and enable LOCKDEP_SUPPORT 
Implement stacktrace interface by using unwind_stack() and enable lockdep
support in Kconfig.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2006-10-01 23:16:57 +01:00