From 3d412a4b30a9f7c7f51ea6562e694315948bd3da Mon Sep 17 00:00:00 2001
From: boris <wzn@moneybot.cc>
Date: Wed, 28 Nov 2018 16:00:02 +1300
Subject: cleaned up

in short, the cheat and loader are now separate solutions. unused stuff was moved into the legacy solution in case anyone wants to compile it or whatever.
i can change this back if you want to. also, i configured the loader to compile in x64, and have separate build types for linux and win64
---
 cheat/gmod/vmt.hpp | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 cheat/gmod/vmt.hpp

(limited to 'cheat/gmod/vmt.hpp')

diff --git a/cheat/gmod/vmt.hpp b/cheat/gmod/vmt.hpp
new file mode 100644
index 0000000..0665e17
--- /dev/null
+++ b/cheat/gmod/vmt.hpp
@@ -0,0 +1,94 @@
+#pragma once
+#include <vector>
+#include "util.hpp"
+
+// todo - dex; rewrite this, VirtualQuery (except for custom codeptr / readptr) and VirtualProtect shouldnt be used 
+//             and we need to copy rtti over too or stuff will break later on
+
+//             correct me if im wrong, but the vtable isnt replaced, instead the original is edited during hooking, rtti should be intact and accessable by game
+//             class could definetly do with a rewrite tho!
+
+//             ^ you're corrct, but changing page rights and replacing ptrs direclty in rdata (or usually the heap, since thats where vmts go) is not a safe solution
+//             copying table + aligning it to compensate for rtti is safer
+//             vac loves scanning memory regions but it doesnt really do much outside of game servers (only loads some shit for checking DEP and stuff)
+
+// trash
+
+//llama is a fucking nigger
+//true
+
+namespace hooks
+{
+	class c_vmt {
+		uintptr_t* m_table;
+		uintptr_t* m_original;
+		std::vector< uintptr_t > m_new;
+	public:
+		int count( ) {
+			int vfunc_count{ };
+
+			while ( m_original[ vfunc_count ] ) {
+				vfunc_count++;
+			};
+
+			return vfunc_count;
+		}
+
+		c_vmt( void* table ) {
+			if ( !table ) {
+				return;
+			}
+
+			this->m_table = reinterpret_cast< uintptr_t* >( table );
+			this->m_original = *reinterpret_cast< uintptr_t** >( this->m_table );
+
+			for ( int i = -1; i < this->count( ); ++i ) {
+				this->m_new.push_back( this->m_original[ i ] );
+			}
+
+			auto data = this->m_new.data( );
+			*this->m_table = uintptr_t( &data[ 1 ] );
+		}
+
+		~c_vmt( ) { }
+
+		template< typename T = uintptr_t > T get_function( int index ) {
+			return( ( T )( this->m_new.at( index + 1 ) ) );
+		}
+
+		template< typename T = uintptr_t > T get_old_function( int index ) {
+			return( ( T )( this->m_original[ index ] ) );
+		}
+
+		void hook( int index, uintptr_t new_func ) {
+			this->m_new.at( index + 1 ) = new_func;
+		}
+
+		void unhook( int index ) {
+			this->m_new.at( index + 1 ) = this->m_original[ index ];
+		}
+
+		void hook( int index, void* new_func ) {
+			hook( index, reinterpret_cast< uintptr_t >( new_func ) );
+		}
+
+		void restore( ) const {
+			*this->m_table = uintptr_t( m_original );
+		}
+
+		static void* hook_method( void* instance, int index, void* function ) {
+			// edits the vtable itself
+			// i cannot be bothered re-hooking stuff on every instance creation
+			// so this should fix this problem, (should be fine on gmod cuz no AC)
+			void** vfunc = *( void*** )instance + index;
+			void* oldvf = *vfunc;
+
+			unsigned long prot;
+			::VirtualProtect( vfunc, 4, 0x40, &prot );
+			*vfunc = function;
+			::VirtualProtect( vfunc, 4, prot, &prot );
+
+			return oldvf;
+		}
+	};
+}
\ No newline at end of file
-- 
cgit v1.2.3