From: Jason Wessel Date: Fri, 21 May 2010 02:04:26 +0000 (-0500) Subject: mips,kgdb: kdb low level trap catch and stack trace X-Git-Tag: v2.6.35-rc1~453^2~6 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5dd11d5d47d248850c58292513f0e164ba98b01e;p=pandora-kernel.git mips,kgdb: kdb low level trap catch and stack trace The only way the debugger can handle a trap in inside rcu_lock, notify_die, or atomic_notifier_call_chain without a recursive fault is to have a low level "first opportunity handler" do_trap_or_bp() handler. Generally this will be something the vast majority of folks will not need, but for those who need it, it is added as a kernel .config option called KGDB_LOW_LEVEL_TRAP. Also added was a die notification for oops such that kdb can catch an oops for analysis. There appeared to be no obvious way to pass the struct pt_regs from the original exception back to the stack back tracer, so a special case was added to show_stack() for when kdb is active because you generally desire to generally look at the back trace of the original exception. Signed-off-by: Jason Wessel Acked-by: Ralf Baechle --- Reading git-diff-tree failed