[Interpreter] Pass context to interpreter bytecode handlers and add LoadConstextSlot

src/compiler/linkage.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_LINKAGE_H_
 #define V8_COMPILER_LINKAGE_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/frame.h"
 #include "src/compiler/machine-type.h"
@@ skipping 317 matching lines @@
   // A special {OsrValue} index to indicate the context spill slot.
   static const int kOsrContextSpillSlotIndex = -1;
 
   // Special parameter indices used to pass fixed register data through
   // interpreter dispatches.
   static const int kInterpreterAccumulatorParameter = 0;
   static const int kInterpreterRegisterFileParameter = 1;
   static const int kInterpreterBytecodeOffsetParameter = 2;
   static const int kInterpreterBytecodeArrayParameter = 3;
   static const int kInterpreterDispatchTableParameter = 4;
+  static const int kInterpreterContextParameter = 5;
 
  private:
   CallDescriptor* const incoming_;
 
   DISALLOW_COPY_AND_ASSIGN(Linkage);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LINKAGE_H_