bool CDetour::Remove ( BYTE *orig, BYTE *jmp, int iPatchType, int len )
{
int iMinLen = 0;
DWORD dwBack = 0;
if ( !(iMinLen = GetDetourLen(iPatchType)) )
return false;
if ( len != 0 && len < iMinLen )
return false;
// Try and find the end of the instruction automatically
if ( len == 0 )
{
len = GetDetourLenAuto( jmp, iMinLen );
if ( len == 0 )
len = GetDetourLen( iPatchType );
if ( len == 0 || iMinLen == 0 )
return false;
if ( len < iMinLen )
return false;
}
// Write the bytes @ the jmp back to the orig
MEMORY_BASIC_INFORMATION mbi;
VirtualQuery( (void *)orig, &mbi, sizeof(mbi) );
VirtualProtect( mbi.BaseAddress, mbi.RegionSize, PAGE_EXECUTE_READWRITE, &mbi.Protect );
memcpy( orig, jmp, len );
VirtualProtect( mbi.BaseAddress, mbi.RegionSize, mbi.Protect, &mbi.Protect );
FlushInstructionCache( GetCurrentProcess(), (void *)orig, len );
return true;
}
void *CDetour::Create ( char *dllName, char *apiName, const BYTE *det, int iPatchType, int len )
{
BYTE *jmp = NULL;
BYTE *orig = NULL;
int iMinLen = 0;
if ( !(iMinLen = GetDetourLen(iPatchType)) )
return 0;
if ( len != 0 && len < iMinLen )
return 0;
// Get the API address
m_hModule = GetModuleHandle( dllName );
m_dwAddress = ( DWORD ) GetProcAddress( m_hModule, apiName );
if ( !m_dwAddress || !det )
return 0;
orig = (BYTE *)m_dwAddress;
// Try and find the end of the instruction automatically
if ( len == 0 )
{
len = GetDetourLenAuto( orig, iMinLen );
if ( len < iMinLen )
return 0;
}
if ( !Detour(jmp, orig, det, iPatchType, len) )
return 0;
return jmp - len;
}
void *CDetour::Create ( BYTE *orig, const BYTE *det, int iPatchType, int len )
{
BYTE *jmp = NULL;
int iMinLen = 0;
if ( !(iMinLen = GetDetourLen(iPatchType)) )
return 0;
if ( len != 0 && len < iMinLen )
return 0;
// Try and find the end of the instruction automatically
if ( len == 0 )
{
len = GetDetourLenAuto( orig, iMinLen );
if ( len < iMinLen )
return 0;
}
if ( !Detour(jmp, orig, det, iPatchType, len) )
return 0;
return jmp - len;
}
void *CDetour::Create(BYTE *orig, const BYTE *det, int iPatchType, int len)
{
BYTE *jmp = NULL;
int iMinLen = 0;
// Get minimum bytes to overwrite
if(iPatchType == DETOUR_TYPE_OBS_RAND)
iPatchType = (rand() % (DetourRandTypeHigh - DetourRandTypeLow + 1) + DetourRandTypeLow);
if(!(iMinLen = GetDetourLen(iPatchType)))
return 0;
if(len != 0 && len < iMinLen)
return 0;
// Try and find the end of the instruction automatically
if(len == 0)
{
len = GetDetourLenAuto(orig, iMinLen);
if(len < iMinLen)
return 0;
}
if(!Detour(jmp, orig, det, iPatchType, len))
return 0;
IsHooked = true;
return (jmp-len);
}
bool CDetour::Remove ( char *dllName, char *apiName, BYTE *jmp, int iPatchType, int len )
{
DWORD dwBack = 0;
BYTE *orig = NULL;
int iMinLen = 0;
// Get the API address
m_hModule = GetModuleHandle( dllName );
m_dwAddress = ( DWORD ) GetProcAddress( m_hModule, apiName );
if ( !m_dwAddress || !jmp )
return false;
orig = (BYTE *)m_dwAddress;
if ( !(iMinLen = GetDetourLen(iPatchType)) )
return false;
if ( len != 0 && len < iMinLen )
return false;
// Try and find the end of the instruction automatically
if ( len == 0 )
{
len = GetDetourLenAuto( jmp, iMinLen );
if ( len < iMinLen )
return 0;
}
// Write the bytes @ the jmp back to the orig
VirtualProtect( orig, len, PAGE_READWRITE, &dwBack );
memcpy( orig, jmp, len );
VirtualProtect( orig, len, dwBack, &dwBack );
return true;
}
