Thread: Help calling function is asm

Originally Posted by Salem

I still can't figure out why you're trying to call all these functions using asm?
It seems like hard work, and you often get it wrong.

If (and I stress "IF") you get the types right, and the address right, then there is no reason for the function pointer approach to fail.

For example, how do you know that ZPostShotMelee begins at 00480C70 ?
Is that address even in the same address space as your program?
Is it in a DLL, which may relocate to another address?
Do you have the correct calling convention. There are several on a win32 platform.

Another question is why don't you have the source code for all of these asm functions you keep posting.

Also, how do you know you're getting the right setup/teardown sequence? It seems to me you're just calling things at random. It's a bit like calling fread() without calling fopen() first kinda thing.

Are you trying to hack a game to give yourself some magic powers which normal people won't have? That's what I read into the snippets you've posted so far.

Because you can't call them without asm. And yes I'm sure the address is right.

Originally Posted by matsp

Why not?

--
Mats

Because I tried it and it didn't work.

Originally Posted by matsp

Ok, so why does it then NOT work when you do it in assembler? Perhaps there is something ELSE that is wrong?

I have used "creative use" of function pointers, like what is described in a previous post. It works. But of course, if you pass in the wrong value, or in the wrong way, then you will end up with any sort of "bad" result.

What is the actual crash you are seeing?

--
Mats

The game gives me an error report message.

Originally Posted by matsp

And the contents of that error report is?

And is that different from what happens when you make the call in C or Assembler? [E.g is the address the same, same register content, etc, etc or are the values/addresses different]?

--
Mats

The error report are strange character, and I get it by using C and Asm.
Addresses and values are same.