diff options
Diffstat (limited to 'gmod/vmt.hpp')
| -rw-r--r-- | gmod/vmt.hpp | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/gmod/vmt.hpp b/gmod/vmt.hpp deleted file mode 100644 index 0665e17..0000000 --- a/gmod/vmt.hpp +++ /dev/null @@ -1,94 +0,0 @@ -#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;
- }
- };
-}
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