danielga / detouring Goto Github PK

Hello, I'm trying to detour virtual function GarrysMod::Lua::ILuaInterface::Cycle on windows by using Detouring::ClassProxy. On win32 build (main branch) everything successfully detours, but on x64 build (x86-64 branch) function not called (but Hook(...) returns true).

As I found in Detouring::GetVirtualAddress variable addr is 0xFF on win32 build, and 0xE9 on x64 build. Because of this check for jmp function fails, iterating over vtable also fails, then ClassProxy::Hook tries to hook function by using Detouring::Hook, and returns true, but function isn't called.

As I found myself, 0xFF is opcode for jump to absolute address, and 0xE9 is opcode for jump to relative address. Is there are solution fix detouring on x64 build? Thank you in advance.

So I'm just wanting clarification but would this repository be useful for modifying how a function behaves. for example modifying the Exported MsgC function of teir0 to instead return reveresed text, and have it where if any place in the engine called the MsgC() function it would always be reverse text, just for a simple example.

Would this tool be usefull for achieving that sort of stuff? or is it more for detouring lua functions inside c++? Or would it only work inside the module using this itself?

Can we have a way to call Disable/Enable on certain hooks in shared_state->hooks?