x64 parameter passing

Note these for reversing x64 binary.

1. Windows x64 parameter passing registers

RCX - RDX - R8 - R9

2. Linux x64 parameter passing registers

RDI - RSI - RDX - RCX - R8 - R9

86-64	Microsoft x64 calling convention[9]	Windows (Microsoft Visual C++, GCC,Intel C++ Compiler, Embarcadero compiler), UEFI	RCX/XMM0, RDX/XMM1, R8/XMM2, R9/XMM3	RTL (C)	Caller	Stack aligned on 16 bytes. 32 bytes shadow space on stack. The specified 8 registers can only be used for parameters 1 through 4.
	System V AMD64 ABI[11]	GNU/Linux, BSD, Mac OS X (GCC, Intel C++ Compiler)	RDI, RSI, RDX, RCX, R8, R9, XMM0–7	RTL (C)	Caller	Stack aligned on 16 bytes boundary. Red zone below stack.