X64: Create test JS-function and call it.

src/x64/codegen-x64.cc

Index: src/x64/codegen-x64.cc
diff --git a/src/x64/codegen-x64.cc b/src/x64/codegen-x64.cc
index 06bc9d7a440747f47a2d2e2197b14dafb2fe09a1..ad186068afe471d9ab3ebbc68defb63d682f564c 100644
--- a/src/x64/codegen-x64.cc
+++ b/src/x64/codegen-x64.cc
@@ -571,7 +571,8 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
     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));