VM: New calling convention for generated code.

runtime/vm/stack_frame_arm.h

Index: runtime/vm/stack_frame_arm.h
diff --git a/runtime/vm/stack_frame_arm.h b/runtime/vm/stack_frame_arm.h
index e391334fa1190a3e94fae5104cb921f326d1064e..8f22815048f24107ea06d7bcf289b4aeff6b9adb 100644
--- a/runtime/vm/stack_frame_arm.h
+++ b/runtime/vm/stack_frame_arm.h
@@ -12,16 +12,16 @@ namespace dart {
                |                    | <- TOS
 Callee frame   | ...                |
                | saved PP           |    (PP of current frame)
+               | code object        |
                | saved FP           |    (FP of current frame)
                | saved LR           |    (PC of current frame)
-               | callee's PC marker |
                +--------------------+
 Current frame  | ...               T| <- SP of current frame
                | first local       T|
                | caller's PP       T|
+               | code object       T|    (current frame's code object)
                | caller's FP        | <- FP of current frame
                | caller's LR        |    (PC of caller frame)
-               | PC marker          |    (current frame's code entry + offset)
                +--------------------+
 Caller frame   | last parameter     | <- SP of caller frame
                |  ...               |
@@ -30,20 +30,20 @@ Caller frame   | last parameter     | <- SP of caller frame
 */
 
 static const int kDartFrameFixedSize = 4;  // PP, FP, LR, PC marker.
-static const int kSavedPcSlotFromSp = -2;
+static const int kSavedPcSlotFromSp = -1;
 
 static const int kFirstObjectSlotFromFp = -1;  // Used by GC to traverse stack.
 
-static const int kFirstLocalSlotFromFp = -2;
-static const int kSavedCallerPpSlotFromFp = -1;
+static const int kFirstLocalSlotFromFp = -3;
+static const int kSavedCallerPpSlotFromFp = -2;
+static const int kPcMarkerSlotFromFp = -1;
 static const int kSavedCallerFpSlotFromFp = 0;
 static const int kSavedCallerPcSlotFromFp = 1;
-static const int kPcMarkerSlotFromFp = 2;
-static const int kParamEndSlotFromFp = 2;  // One slot past last parameter.
-static const int kCallerSpSlotFromFp = 3;
+static const int kParamEndSlotFromFp = 1;  // One slot past last parameter.
+static const int kCallerSpSlotFromFp = 2;
 
 // Entry and exit frame layout.
-static const int kExitLinkSlotFromEntryFp = -26;
+static const int kExitLinkSlotFromEntryFp = -27;
 
 }  // namespace dart