ARM kprobes: prevent some functions involved with kprobes from being probed

Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/asm-arm/traps.h b/include/asm-arm/traps.h
index d4f34dc83eb0..f1541afcf85c 100644
--- a/include/asm-arm/traps.h
+++ b/include/asm-arm/traps.h
@@ -15,4 +15,13 @@ struct undef_hook {
 void register_undef_hook(struct undef_hook *hook);
 void unregister_undef_hook(struct undef_hook *hook);
 
+static inline int in_exception_text(unsigned long ptr)
+{
+        extern char __exception_text_start[];
+        extern char __exception_text_end[];
+
+        return ptr >= (unsigned long)&__exception_text_start &&
+               ptr < (unsigned long)&__exception_text_end;
+}
+
 #endif