Help! Game crashes when hooking Update() method

[Denka]

Hi. When i hook update method the game crashes. Here is my update and old update method:

void (*GoldHack_old)(void *instance);
void GoldHack(void *instance){
    if(instance != NULL && NM.isMajor){
        *(float *) ((uint64_t) instance + 0x300) = 999.5f;
    }
    return GoldHack_old(instance);
}

And here is my hook call: A64HookFunction((void *)getAbsoluteAddress("libil2cpp.so", 0x655D98), (void *)GoldHack, (void **)&GoldHack_old);
Help me pls

 

[Poison Modz]

void (*old_GoldHack)(void *instance);
void GoldHack(void *instance){
if(instance != NULL && NM.isMajor){
*(float *) ((uint64_t) instance + 0x300) = 999.5f;
}
return old_GoldHack(instance);
}

A64HookFunction((void *)getAbsoluteAddress("libil2cpp.so", 0x655D98), (void *)GoldHack, (void **)&old_GoldHack);

 

[Raebydett]

@Poison Modz rename the update old_ / _old doesnt change anything, u can use any random name still works lol

@Denka everything looks fine to me, maybe use other update method from another class that used on that instance

 

[Denka]

@Poison Modz rename the update old_ / _old doesnt change anything, u can use any random name still works lol

@Denka everything looks fine to me, maybe use other update method from another class that used on that instance

i've tried hook update method on another game, it didnt work

 

[Francois284Modz]

Why are you returning value in à void type ? Void does not return value
Replace this
return GoldHack_old(instance);

By juste
GoldHack_old(instance);

 

[Denka]

Why are you returning value in à void type ? Void does not return value
Replace this
return GoldHack_old(instance);

By juste
GoldHack_old(instance);

doesnt have any sense

 

[Francois284Modz]

doesnt have any sense

Yes it does h1ve since if you cant understand that void function does not return value you need to start learning programing

 

[Denka]

Yes it does h1ve since if you cant understand that void function does not return value you need to start learning programing

do not teach me, IT WORKS FINE with "return"

 

[Francois284Modz]

Game name

 

[Denka]

Game name

Dictators: No Peace

 

[Poison Modz]

I already make mod for dictator no peace

 

[NotALegitGuy]

You might wanna check that the field offset ( Basically the + 0x300 ) is correct as it could be a null pointer dereference.

 

[Denka]

I already make mod for dictator no peace

i wanna make it by mydelf, to learn modding

 

[GamerBoi2020]

i wanna make it by mydelf, to learn modding

Did you ever figure this out bro? I'm having the same problem. I tried just about every other update, lateupdate, fixedupdate without any success. Keeps crashing.

 

[GamerBoi2020]

NVM I got it working. FYI if someone else runs into this issue I am sharing what worked for me:

Say you want to hack ammo for example. In a lot of games you would have a getAmmo and/or setAmmo. But knowing my luck, in my game, the only thing "feasible" I was able to find in my dump.cs file with the word "Ammo" was AmmoInMag, and it's a field offset. There are no methods with the word "Ammo" whatsoever. I have an Update() method in this class but whenever I hook the AmmoInMag field offset to the Update() method the game crashes. I tried other Update/LateUpdate/FixedUpdate methods from other classes and I even tried Start() and Awake() methods with no success...kept crashing. In this case it's pretty evident that the field offset just isn't going to work for whatever reason. At least I don't know how to get it working. HOWEVER, I did spot a Void Refill() method in the same class. So I hooked it like this and it worked! I got infinite Ammo:

void (*Anyname)(void *instance,int value);
void (*_voidinthooking)(void *instance);
void Voidinthooking(void *instance) {
    if (instance != NULL) {
        if (VoidHookingint) {
            Anyname(instance, 999); //you can replace it with any number you want
            }
            }
            return _voidinthooking(instance);
            }



HOOK_LIB("libil2cpp.so","0xUpdateOFFSET",Voidinthooking,_voidinthooking);
Anyname = (void (*)(void *, int))getAbsoluteAddress("libil2cpp.so",0x(TheRefillOFFSET));

So in conclusion look for a method that has to do with whatever field offset you're trying to hook with an Update (which is crashing the game), even if it's not "worded" with what you think it should be. "Refill" has to do with "Ammo". So Voila!

 

[GamerBoi2020]

You might wanna check that the field offset ( Basically the + 0x300 ) is correct as it could be a null pointer dereference.

Thanks bro. This hint tipped me off and got me thinking in the right direction and I solved my issue.