bool walkStack(CONTEXT& context, bool toInit = false)
{
  static STACKFRAME frame;
  if(toInit)
  {
    ZeroMemory(&frame, sizeof(STACKFRAME));
    frame.AddrPC.Offset = context.Eip;
    frame.AddrStack.Offset = context.Esp;
    frame.AddrFrame.Offset = context.Ebp;
    frame.AddrFrame.Mode = frame.AddrStack.Mode = frame.AddrPC.Mode = AddrModeFlat;
  }

  if( !StackWalk(IMAGE_FILE_MACHINE_I386, GetCurrentProcess(), GetCurrentThread(),
                 &frame, &context, NULL, SymFunctionTableAccess, SymGetModuleBase, NULL) ||
      !frame.AddrFrame.Offset )
    return false;

  return true;
}

void getCallStack()
{
  CONTEXT context = {0};
  context.ContextFlags = CONTEXT_FULL;
  __asm
  {
     call x
  x: pop eax
     mov context.Eip, eax
     mov context.Ebp, ebp
     mov context.Esp, esp
  }

  bool ret = walkStack(context, true);
  for( ; ret; )
    ret = walkStack(context);
}