[Interpreter] Save and restore dispatch table pointer during calls.

src/arm64/builtins-arm64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 979 matching lines @@
 //
 // The function builds an interpreter frame.  See InterpreterFrameConstants in
 // frames.h for its layout.
 void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   // Open a frame scope to indicate that there is a frame on the stack.  The
   // MANUAL indicates that the scope shouldn't actually generate code to set up
   // the frame (that is done below).
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ Push(lr, fp, cp, x1);
   __ Add(fp, jssp, StandardFrameConstants::kFixedFrameSizeFromFp);
-  __ Push(x3);
 
-  // Push zero for bytecode array offset.
+  // Push dispatch table pointer.
   __ Mov(x0, Operand(0));
-  __ Push(x0);
+  __ Mov(x2, Operand(ExternalReference::interpreter_dispatch_table_address(
+                 masm->isolate())));
+  __ Push(x3, x2, x0);
 
   // Get the bytecode array from the function object and load the pointer to the
   // first entry into kInterpreterBytecodeRegister.
   __ Ldr(x0, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset));
   __ Ldr(kInterpreterBytecodeArrayRegister,
          FieldMemOperand(x0, SharedFunctionInfo::kFunctionDataOffset));
 
   if (FLAG_debug_code) {
     // Check function data field is actually a BytecodeArray object.
     __ AssertNotSmi(kInterpreterBytecodeArrayRegister,
@@ skipping 36 matching lines @@
   //  - Call ProfileEntryHookStub when isolate has a function_entry_hook.
   //  - Code aging of the BytecodeArray object.
 
   // Load accumulator, register file, bytecode offset, dispatch table into
   // registers.
   __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex);
   __ Add(kInterpreterRegisterFileRegister, fp,
          Operand(InterpreterFrameConstants::kRegisterFilePointerFromFp));
   __ Mov(kInterpreterBytecodeOffsetRegister,
          Operand(BytecodeArray::kHeaderSize - kHeapObjectTag));
-  __ Mov(kInterpreterDispatchTableRegister,
-         Operand(ExternalReference::interpreter_dispatch_table_address(
-             masm->isolate())));
+  __ Ldr(kInterpreterDispatchTableRegister,
+         MemOperand(fp, InterpreterFrameConstants::kDispatchTableFromFp));
 
   // Dispatch to the first bytecode handler for the function.
   __ Ldrb(x1, MemOperand(kInterpreterBytecodeArrayRegister,
                          kInterpreterBytecodeOffsetRegister));
   __ Mov(x1, Operand(x1, LSL, kPointerSizeLog2));
   __ Ldr(ip0, MemOperand(kInterpreterDispatchTableRegister, x1));
   // TODO(rmcilroy): Make dispatch table point to code entrys to avoid untagging
   // and header removal.
   __ Add(ip0, ip0, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ Call(ip0);
@@ skipping 1745 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM