[WASM] Implements catch for the wasm low level exception mechanism.

src/arm64/code-stubs-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/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 1071 matching lines @@
   // (except for the return address slot). However, we don't need to initialize
   // jssp because the throw method will immediately overwrite it when it
   // unwinds the stack.
   __ SetStackPointer(jssp);
 
   // Retrieve the handler context, SP and FP.
   __ Mov(cp, Operand(pending_handler_context_address));
   __ Ldr(cp, MemOperand(cp));
   __ Mov(jssp, Operand(pending_handler_sp_address));
   __ Ldr(jssp, MemOperand(jssp));
+  __ Mov(csp, jssp);
   __ Mov(fp, Operand(pending_handler_fp_address));
   __ Ldr(fp, MemOperand(fp));
 
   // If the handler is a JS frame, restore the context to the frame. Note that
   // the context will be set to (cp == 0) for non-JS frames.
   Label not_js_frame;
   __ Cbz(cp, &not_js_frame);
   __ Str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   __ Bind(&not_js_frame);
 
@@ skipping 4172 matching lines @@
                            kStackUnwindSpace, NULL, spill_offset,
                            return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64