Ring3 Circus
12-05-2007, 04:45 PM
I was recently somewhat surprised to find that there is really no C++ way to resolve a virtual function to its address at run-time. Admittedly, there is no good reason why anybody would morally need to do this, but when you’ve already lowered yourself to patching another process’s own code without consent, it seems like a very small crime.
Pioneers of such hackery have already established concrete methods for calling virtual functions from inline assembly (http://www.codeproject.com/cpp/InvokeCPPMemberOps.asp), but these methods don’t quite stretch to getting the address in pointer form. So, if for no reason other than to convince you that it’s a lot of hassle, I present a miserable bit-chop hack to do just this.
(more…
(http://www.ring3circus.com/gameprogramming/run-time-determination-of-vc-2005-virtual-member-function-addresses/#more-33)
http://www.ring3circus.com/gameprogramming/run-time-determination-of-vc-2005-virtual-member-function-addresses/
Pioneers of such hackery have already established concrete methods for calling virtual functions from inline assembly (http://www.codeproject.com/cpp/InvokeCPPMemberOps.asp), but these methods don’t quite stretch to getting the address in pointer form. So, if for no reason other than to convince you that it’s a lot of hassle, I present a miserable bit-chop hack to do just this.
(more…
(http://www.ring3circus.com/gameprogramming/run-time-determination-of-vc-2005-virtual-member-function-addresses/#more-33)http://www.ring3circus.com/gameprogramming/run-time-determination-of-vc-2005-virtual-member-function-addresses/