tracing: ftrace events for user faults and undefined instructions
New ftrace events (user_fault and undef_instr) for data, prefetch
or undefined instruction aborts. The new ftrace events are under
events/exception.
Change-Id: Iea328b71a1f623861cac9b45d858c3bbe09e1b82
Signed-off-by: Pushkar Joshi <pushkarj@codeaurora.org>
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index ff5d873..12e6fcb 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -37,6 +37,8 @@
#include "signal.h"
+#include <trace/events/exception.h>
+
static const char *handler[]= { "prefetch abort", "data abort", "address exception", "interrupt" };
#ifdef CONFIG_LGE_CRASH_HANDLER
@@ -437,6 +439,8 @@
if (call_undef_hook(regs, instr) == 0)
return;
+ trace_undef_instr(regs, (void *)pc);
+
#ifdef CONFIG_DEBUG_USER
if (user_debug & UDBG_UNDEFINED) {
printk(KERN_INFO "%s (%d): undefined instruction: pc=%p\n",