X64: Create test JS-function and call it.

src/x64/codegen-x64.cc

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@@ skipping 553 matching lines @@
   // from an external reference instead of inlining the call target address
   // directly in the code, because the builtin stubs may not have been
   // generated yet at the time this code is generated.
   if (is_construct) {
     ExternalReference construct_entry(Builtins::JSConstructEntryTrampoline);
     __ load_rax(construct_entry);
   } else {
     ExternalReference entry(Builtins::JSEntryTrampoline);
     __ load_rax(entry);
   }
-  __ call(FieldOperand(rax, Code::kHeaderSize));
+  __ lea(kScratchRegister, FieldOperand(rax, Code::kHeaderSize));

[William Hesse, 2009/06/11 13:04:24]

Can you use a Call() from MacroAssembler, that includes the load to
kScratchRegister?  Otherwise, add one to MacroAssembler.

[Lasse Reichstein, 2009/06/11 13:16:05]

I would rather not.
The expected meaning of a Call(Operand) would be to read the memory value
pointed to by Operand and call that. This is really just using
lea(...,Operand(rax. kHeaderSzie)) as a shorthand for adding kHeaderSize to rax.

+  __ call(kScratchRegister);
 
   // Unlink this frame from the handler chain.
   __ movq(kScratchRegister, ExternalReference(Top::k_handler_address));
   __ pop(Operand(kScratchRegister, 0));
   // Pop next_sp.
   __ addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize));
 
   // Restore the top frame descriptor from the stack.
   __ bind(&exit);
   __ movq(kScratchRegister, ExternalReference(Top::k_c_entry_fp_address));
@@ skipping 11 matching lines @@
 
   // Restore frame pointer and return.
   __ pop(rbp);
   __ ret(0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal