int EngineInfo::vac_pe_approx( enginefuncs_t* _pFuncs )
{
if ( NULL == _pFuncs ) return INVALID_ARG;
// There is really no good and easy way to do this. Right now what
// we do is assume that Steam listenservers will normally be
// up-to-date and hence have all function pointers set correctly.
// So we just check for some anomality and then set some approximated
// values.
// The known addresses at the time of writing all start with 0x01D and
// this lie in the range between 0x01D00000 and 0x01E00000. What we do
// is check all functions pointers that are known to be good to start
// with 0x01D. If that is the case then we know that the loading address
// of the engine functions hasn't changed and we assume the above stated
// range to be the range of valid engine function addresses.
// If we find functions outside this range we can't determine a valid
// range and have to just give up.
unsigned long* pengfuncs = (unsigned long*)_pFuncs;
unsigned int i, invals = 0;
for ( i = 0, pengfuncs += i; i < 140; i++, pengfuncs++ ) {
if ( ((*pengfuncs) & c_VacDllEngineFuncsRangeMask) != c_VacDllEngineFuncsRangeMark ) {
invals++;
break;
}
}
if ( invals > 0 ) {
META_DEV( "Found %d engine functions out of range 0x%08lx. "
"Unable to determine valid engine code address range.",
invals, c_VacDllEngineFuncsRangeMark );
strncpy( m_type, "vacdll+?", c_EngineInfo__typeLen );
m_state = STATE_INVALID;
return STATE_INVALID;
}
m_codeStart = c_VacDllEngineFuncsRangeStart;
m_codeEnd = c_VacDllEngineFuncsRangeEnd;
strncpy( m_type, "vacdll", c_EngineInfo__typeLen );
m_state = STATE_VALID;
return 0;
}
void WINAPI GiveFnptrsToDll(enginefuncs_t *pengfuncsFromEngine,
globalvars_t *pGlobals)
{
gpGlobals = pGlobals;
Engine.funcs = &g_engfuncs;
Engine.globals = pGlobals;
Engine.info.initialise(pengfuncsFromEngine);
g_engfuncs.initialise_interface(pengfuncsFromEngine);
// NOTE! Have to call logging function _after_ initialising g_engfuncs, so
// that g_engfuncs.pfnAlertMessage() can be resolved properly, heh. :)
META_DEV("called: GiveFnptrsToDll");
// Load plugins, load game dll.
metamod_startup();
return;
}
// Receive engine function table from engine.
//
// This appears to be the _first_ DLL routine called by the engine, so this
// is where we hook to load all the other DLLs (game, plugins, etc), which
// is actually all done in meta_startup().
C_DLLEXPORT void WINAPI GiveFnptrsToDll(enginefuncs_t *pengfuncsFromEngine,
globalvars_t *pGlobals)
{
#ifdef linux
metamod_handle = get_module_handle_of_memptr((void*)&g_engfuncs);
#endif
gpGlobals = pGlobals;
Engine.funcs = &g_engfuncs;
Engine.globals = pGlobals;
Engine.info.initialise(pengfuncsFromEngine);
g_engfuncs.initialise_interface(pengfuncsFromEngine);
// NOTE! Have to call logging function _after_ initialising g_engfuncs, so
// that g_engfuncs.pfnAlertMessage() can be resolved properly, heh. :)
META_DEV("called: GiveFnptrsToDll");
// Load plugins, load game dll.
if(!metamod_startup()) {
metamod_not_loaded = 1;
}
return;
}