Hey all,
My goal is to pass a function pointer to a function, and then do the
operation that is pointed to by the function pointer, like the following:
======in kernel.cpp===========
void show()
{
cout<<"a piece of mystery";
}
=======in wrapper.cpp=========
typedef void (*fpr)();
wrapper(fpr kernel)
{
(*kernel)();
Check_error();
}
Main()
{
...
fpr kernel = show;
wrapper(kernel);
...
}
=================================
Now, I need to achieve the same goal without using function calls(and
therefore no function pointers). So, I am thinking about indirect jumps. I
tend to define a unique code label within each kernel operator, and then I
can pass the indirect jump's target address to the mymain function, which
can then jump to the right instruction. But I don't know how to do it. It
can be something like the following:
============in kernel.cpp============
void show()
{
LABEL_SHOW:
cout<<"a piece of mystery";
goto END_MAIN;
}
=======in wrapper.cpp=========
wrapper(unsigned long target_address)
{
goto target_address;
END_MAIN:
Check_error();
}
Main()
{
...
unsigned long target_address = LEBEL_SHOW;
wrapper(target_address);
...
}
=================================
Can anyone help me? I appreciate it a lot!
Thanks!
Jiayuan
