how do I pass by reference to a function using __asm

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Hi,

I am using VS2008, Windows7 64bit, and MFC dialog base app.

C++

void _stdcall FuncA(int & a)
{
  a += 3;  // get error: access violation
}
void CMfcAsmTestDlg::OnBnClickedButton1()
{
  int var = 8;
   __asm
   {
    push var
    call FuncA
   }
}

Help please?

Posted 9-Aug-11 2:06am

Mizan Rahman

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వేంకటనారాయణ(venkatmakam) · Answer 1 · 2011-08-09T02:45:00

Solution 1

Like this,

CSS

int var = 8;
__asm
{
    lea eax, [var]
    push eax
    call FuncA
}

[Edited]
You can write a small code by calling FuncA normally and start debugger and go to dissambler, there you can see the assembly code.

Posted 9-Aug-11 2:45am

వేంకటనారాయణ(venkatmakam)

Updated 9-Aug-11 2:47am

v2