Dynamic Vtable Index Recover

[Stephen Eckels]

Hey, your vtable hooks have hardcoded indices, you can recover these dynamically using this:

https://gist.github.com/stevemk14ebr/12d70ae90175e71194520e9bb0c5e1e5

Example of what I mean:

UniversalHookX/UniversalHookX/src/hooks/backend/dx12/hook_directx12.cpp

Lines 214 to 226 in 1e54967

 void* fnCreateSwapChain = pFactoryVTable[10]; 
 void* fnCreateSwapChainForHwndChain = pFactoryVTable[15]; 
 void* fnCreateSwapChainForCWindowChain = pFactoryVTable[16]; 
 void* fnCreateSwapChainForCompChain = pFactoryVTable[24]; 
  
 void* fnPresent = pVTable[8]; 
 void* fnPresent1 = pVTable[22]; 
  
 void* fnResizeBuffers = pVTable[13]; 
 void* fnResizeBuffers1 = pVTable[39]; 
  
 void* fnExecuteCommandLists = pCommandQueueVTable[10]; 
  

[Marius]

i don't think windows will ever change the indexes but this is a good addition

[Stephen Eckels]

I agree with you, you could use it to unify parts of the directx hooks across versions though.