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Commit b74ab703 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Don't NOTIFY_STOP for non-UBC breakpoint traps. 



Presently the hw_breakpoint code is the primary notifier dispatch for
breakpoint traps, although it's only UBC traps that are of particular
interest there. This patches in a check to allow non-UBC generated
breakpoints to pass through down the remainder of the notifier chain,
giving things like kgdb a chance at getting notified.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 6c0ee6a4

arch/sh/kernel/hw_breakpoint.c

+9 −0
Original line number Diff line number Diff line
@@ -398,9 +398,18 @@ BUILD_TRAP_HANDLER(breakpoint) 
int __kprobes hw_breakpoint_exceptions_notify(struct notifier_block *unused,

				    unsigned long val, void *data)

{

	struct die_args *args = data;



	if (val != DIE_BREAKPOINT)

		return NOTIFY_DONE;



	/*

	 * If the breakpoint hasn't been triggered by the UBC, it's

	 * probably from a debugger, so don't do anything more here.

	 */

	if (args->trapnr != 0x1e0)

		return NOTIFY_DONE;



	return hw_breakpoint_handler(data);

}