Direct call api functions (arm implementation)

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
===================================================================
--- src/arm/macro-assembler-arm.h	(revision 6213)
+++ src/arm/macro-assembler-arm.h	(working copy)
@@ -256,7 +256,8 @@
   // Expects the number of arguments in register r0 and
   // the builtin function to call in register r1. Exits with argc in
   // r4, argv in r6, and and the builtin function to call in r5.
-  void EnterExitFrame(bool save_doubles);
+  // |stack_space| pending pushes, used for alignment before  call to C.
+  void EnterExitFrame(bool save_doubles, int stack_space);
 
   // Leave the current exit frame. Expects the return value in r0.
   void LeaveExitFrame(bool save_doubles);
@@ -588,6 +589,12 @@
   // Call a code stub.
   void TailCallStub(CodeStub* stub, Condition cond = al);
 
+  // Tail call a code stub (jump) and return the code object called.  Try to
+  // generate the code if necessary.  Do not perform a GC but instead return
+  // a retry after GC failure.
+  MUST_USE_RESULT MaybeObject* TryTailCallStub(CodeStub* stub,
+                                               Condition cond = al);
+
   // Call a runtime routine.
   void CallRuntime(Runtime::Function* f, int num_arguments);
   void CallRuntimeSaveDoubles(Runtime::FunctionId id);
@@ -606,6 +613,12 @@
                                  int num_arguments,
                                  int result_size);
 
+  // Tail call of a runtime routine (jump). Try to generate the code if
+  // necessary. Do not perform a GC but instead return a retry after GC
+  // failure.
+  MUST_USE_RESULT MaybeObject* TryTailCallExternalReference(
+      const ExternalReference& ext, int num_arguments, int result_size);
+
   // Convenience function: tail call a runtime routine (jump).
   void TailCallRuntime(Runtime::FunctionId fid,
                        int num_arguments,
@@ -629,9 +642,25 @@
   void CallCFunction(ExternalReference function, int num_arguments);
   void CallCFunction(Register function, int num_arguments);
 
+  // Creates the exit frame, pushes the arguments and aligns the stack
+  // for the C call. saves the fp and context in top.
+  // |arg_stack_space| - space allocated for the structure (e.g.
+  // v8::arguments in a direct call) on top of the exit frame.
+  // |unwind_space| - space to be unwound on exit (includes the call js
+  // arguments space and the additonal space allocated for the fast call).
+  void PrepareCallApiFunction(int arg_stack_space,
+                              int unwind_space);
+
+  // Calls an API function. Allocates HandleScope, extracts
+  // returned value from handle and propagates exceptions.
+  // Restores context.
+  MaybeObject* TryCallApiFunctionAndReturn(ApiFunction* function);
+
   // Jump to a runtime routine.
   void JumpToExternalReference(const ExternalReference& builtin);
 
+  MaybeObject* TryJumpToExternalReference(const ExternalReference& ext);
+
   // Invoke specified builtin JavaScript function. Adds an entry to
   // the unresolved list if the name does not resolve.
   void InvokeBuiltin(Builtins::JavaScript id, InvokeJSFlags flags);