Add a level of indirection to exception handler addresses.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 8f6803eabc941fd79eb6846a5173f9cb443714d8..a3c8b02453dbce4078af19122fb59a573df9182b 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -549,9 +549,9 @@ class MacroAssembler: public Assembler {
   // Exception handling
 
   // Push a new try handler and link into try handler chain.
-  // The return address must be passed in register lr.
-  // On exit, r0 contains TOS (code slot).
-  void PushTryHandler(CodeLocation try_location, HandlerType type);
+  void PushTryHandler(CodeLocation try_location,
+                      HandlerType type,
+                      int handler_index);
 
   // Unlink the stack handler on top of the stack from the try handler chain.
   // Must preserve the result register.