How to get address of base stack pointer

Question

I am in the process of porting an application from x86 to x64. I am using Visual Studio 2009; most of the code is C++ and some portions are plain C. The __asm keyword is not

Answer 1

.code

PUBLIC getStackFrameADDR _getStackFrameADDR
getStackFrameADDR:
    mov RAX, RBP
    ret 0

END

Something like that could work for you.

Compile it with ml64 or jwasm and call it using this in your code extern "C" void getstackFrameADDR(void);