aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sh/kernel/hw_breakpoint.c
diff options
context:
space:
mode:
authorPaul Mundt <lethal@linux-sh.org>2009-12-22 12:40:38 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-12-22 12:40:38 +0900
commitb74ab703b1326aafadb5604ff6200da62c61df49 (patch)
tree82bd4c880526ba0f7ded0302f8926b65bd2ee16b /arch/sh/kernel/hw_breakpoint.c
parentsh: hw-breakpoint support requires perf events. (diff)
downloadlinux-dev-b74ab703b1326aafadb5604ff6200da62c61df49.tar.xz
linux-dev-b74ab703b1326aafadb5604ff6200da62c61df49.zip
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: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to '')
-rw-r--r--arch/sh/kernel/hw_breakpoint.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/sh/kernel/hw_breakpoint.c b/arch/sh/kernel/hw_breakpoint.c
index 75b8c471120f..022d8ed66bd6 100644
--- a/arch/sh/kernel/hw_breakpoint.c
+++ b/arch/sh/kernel/hw_breakpoint.c
@@ -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);
}