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

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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: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-12-22 12:40:38 +09:00
parent 6c0ee6a4bb
commit b74ab703b1
1 changed files with 9 additions and 0 deletions
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9
arch/sh/kernel/hw_breakpoint.c
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@ -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);
}