Remove frame pointer from StackHandler.

src/arm64/macro-assembler-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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
@@ skipping 3024 matching lines @@
   CEntryStub ces(isolate(), 1);
   DCHECK(AllowThisStubCall(&ces));
   Call(ces.GetCode(), RelocInfo::DEBUG_BREAK);
 }
 
 
 void MacroAssembler::PushTryHandler(StackHandler::Kind kind,
                                     int handler_index) {
   DCHECK(jssp.Is(StackPointer()));
   // Adjust this code if the asserts don't hold.
-  STATIC_ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize);
+  STATIC_ASSERT(StackHandlerConstants::kSize == 3 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kStateOffset == 1 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kContextOffset == 2 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kFPOffset == 3 * kPointerSize);
 
   // For the JSEntry handler, we must preserve the live registers x0-x4.
   // (See JSEntryStub::GenerateBody().)
 
   unsigned state =
       StackHandler::IndexField::encode(handler_index) |
       StackHandler::KindField::encode(kind);
 
   // Set up the state for pushing.
   Mov(x11, state);
 
-  // Push the frame pointer, context, and state.
+  // Push the context and state.
   if (kind == StackHandler::JS_ENTRY) {
     DCHECK(Smi::FromInt(0) == 0);
-    Push(xzr, xzr, x11);
+    Push(xzr, x11);
   } else {
-    Push(fp, cp, x11);
+    Push(cp, x11);
   }
 
   // Link the current handler as the next handler.
   Mov(x11, ExternalReference(Isolate::kHandlerAddress, isolate()));
   Ldr(x10, MemOperand(x11));
   Push(x10);
   // Set this new handler as the current one.
   Str(jssp, MemOperand(x11));
 }
 
@@ skipping 2087 matching lines @@
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64