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Help! rrosetta seedhollow template crashing problem

R

ReCheat

Platinian
I am trying to use the template from here

GitHub - seedhollow/IL2CppAndroid: Android Mod Menu Template based on LGL Mod Menu with auto update offsets

Android Mod Menu Template based on LGL Mod Menu with auto update offsets - seedhollow/IL2CppAndroid
github.com

this source has offsets and code for a previously modded game which is great for an example but I have removed or commented out everything I can see related to the game and it compiles fine but as soon as I add it to any game the game crashes when loading

I can use LGL mod menu with no issues but because it is no longer supported I wanted to switch to this updated template but I can't figure out what is causing the crash

does anyone have a bare bones version of this template I can use which does not crash or suggest what is wrong?
 
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@rrosetta
Amazing template but I have a few questions if you can help?

1. I have got hooks working but for some reason I can't get hooks working for get methods

C#: 
public int Coins
{
    [Token(Token = "0x6000FE3")]
    [Address(RVA = "0x20DF77A", Offset = "0x20DF77A", VA = "0x20DF77A")]
    get
    {
        return 0;
    }
}

This is what I am doing

C++: 
UnityResolve::Hook(OBFUSCATE("Player"), OBFUSCATE("get_Coins"), {}, (void *)new_Coins, (void **)&old_Coins);

int (*old_Coins)(void *instance);
int new_Coins(void *instance) {
    if (instance != NULL) {
        if (Vars::PlayerData.CoinsVar)
            return 1000;
    }
    return old_Coins(instance);
}

Class name is Player. I have tried get_Coins and Coins as the method name but neither is working. Is there a different syntax for get & set methods?

2. Is there a way to read & write field values by name directly or a way of getting the FieldOffset by name?

3. Does this template have a settings option or a way for the users settings to be remembered like LGL template 'Save feature preferences'
 
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Okay there, let me answer your question here

1.If you want to hijack a value, you’ll need to use a hooking method. Try logging the instance first to check if it’s null or not. To set the value, you can just use this code
C++: 
// invoke the method and pass the value to the parameter if there any
UnityResolve::Get("somedll.dll")->Get("Player")->Get<UnityResolve::Method>("set_Coins")->Invoke<void>(instance, 9999);

2 to read or write the fiels you can use this method
C++: 
auto pValue = UnityResolve::Get("somedll.dll")->Get("Player")->GetValue<int>(instance, "get_Coins"); // read field value
C++: 
UnityResolve::Get("somedll.dll")->Get("Player")->SetValue<void>(instance, "setCoins", 9999); // set field value

3. Yesn't, we have the preferences setting file but for now i'm not using it, maybe in the future :>

Feel free to ask anything related
 
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Thank you for your help and quick reply

In my example code above there is only a get and not a set
Is there no way to hook the get by name as LGL can hook by address so I could return a different value when the get is called?

If not then I could probably find an alternative class, method or field but would be good to know if hooking a get by name is possible or not?
 
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I'm getting an error when trying to compile on the set field example you posted above

C++: 
UnityResolve::Get("somedll.dll")->Get("Player")->SetValue<void>(instance, "setCoins", 9999); // set field value

no matching member function for call to 'SetValue'
Click to expand...
 
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That code’s basically showing how to hook a function by name, since it’ll auto find the right address for you


C++: 
// this is example how to hook by address
DobbyHook((void*) getAbsoluteAddress("libil2cpp.so",0xF00000), (void*)new_Coins, (void**)&old_Coins);
 
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ReCheat said:
I'm getting an error when trying to compile on the set field example you posted above

C++: 
UnityResolve::Get("somedll.dll")->Get("Player")->SetValue<void>(instance, "setCoins", 9999); // set field value
Click to expand...
ah yeah i forgot, because the field is not the void, you need to change the type data


C++: 
// SetValue<int>, change it the typedata, void is not supported for the field
UnityResolve::Get("somedll.dll")->Get("Player")->SetValue<int>(_this, "coins", 9999);
 
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Thank you, I should have spotted that

It now compiles ok but the only problem is, it crashes with no log if I try to use any of the 3 UnityResolve listed above (Invoke method, read field, write field

Does it matter if the hook is in the Update method or does it use it too often?

This is the write field line which is causing a crash which is hooked in Player Update
C++: 
UnityResolve::Get("UnityEngine.CoreModule.dll")->Get("Player")->SetValue<int>(instance, "Coins", 9999); // set field value

rrosetta said:
That code’s basically showing how to hook a function by name, since it’ll auto find the right address for you
Click to expand...

Yes sorry, I didn't explain myself very well

I have no problem when hooking by address but am now trying to hook by name

All hooks are working ok apart from when I try to hook a get_ method
Hooking a get_ method works fine by address but not by name

I see quite a few games that only have get_ methods and not set_ because the set is sometimes wrapped up in obscured variables so hooking get_ and returning a new value is easier and my preferred method in these cases

Example code:
C#: 
public int Coins
{
    [Token(Token = "0x6000FE3")]
    [Address(RVA = "0x20DF77A", Offset = "0x20DF77A", VA = "0x20DF77A")]
    get
    {
        return 0;
    }
}

if I hook by 0x20DF77A then I can intercept and return new value
In DnSpy the method name is shown as get_Coins but If I try and hook by name ( get_Coins ) then it doesn't work

Can a get_ method be hooked by name or do I have to find an alternative method?

Sorry for all the questions and thanks again for all your help
 
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rrosetta said:
aww man sorry for late reply, i've bussy days and the paid sucks, you can check this issue for the question you ask
How to instantiate a class?
Click to expand...
Thanks but I did find this and I tried already and failed

This is what I tried

C++: 
            const auto assembly = UnityResolve::Get("Assembly-CSharp.dll"); // get dll
            const auto pClass = assembly->Get("Player"); // get classname
            const auto pGame = pClass->New<Player*>(); // create instance?

            UnityResolve::Get("Assembly-CSharp.dll")->Get("Player")->Get<UnityResolve::Method>("AddCoins")->Invoke<void>(pGame,9999);

but I get this error when I try to compile

error: use of undeclared identifier 'Player'
Click to expand...

I'm confused what to use instead of <Game*> because the classname is already used in the previous line?
 
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you need to create the struct named Player if that case, then you can use that struct as instance, try this one

C++: 
typedef struct CPlayerLocal CPlayerLocal;

struct CPlayerLocal {
    auto set_DecreaseAmmo(int pWeaponId, int pAmount = 1) -> void {
        static UnityResolve::Method *method;
        if (!method) method = UnityResolve::Get(OBFUSCATE("Scripts.dll"))->Get(OBFUSCATE("CPlayerLocal"))->Get<UnityResolve::Method>(OBFUSCATE("DecreaseAmmo"));
        if (method) method->Invoke<void>(this, pWeaponId, pAmount);
    }
};


// on somewhere
auto m_PlayerLocal = UnityResolve::Get("Scripts.dll")->Get("CPlayerLocal")->New<CPlayerLocal>(); // create new instance
// and use it like this
m_PlayerLocal->set_DecreaseAmmo(0,0); // the param is dummy


CMIIW :>
 
Last edited:
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rrosetta said:
Feel free to ask in the future and happy modding
Click to expand...
Hello, sorry to tag, but please Help whenever you have the time.... So I am trying to hook and force set the value of "value" in parameters of method set_DefaultPlayerWeaponAmmoSize to 100,
it does not work, or do I have.
I have tested the Method with mismanXP's IL2CPP Tool, and with it work..

// Assembly-CSharp.dll
public class PlayerWeaponBase : System.Object
{
// Fields
private static System.Int32 <SquadLobbyLockedUntilPlayerWeaponRank>k__BackingField; // 0x0
private static System.Int32 <MaximumRankInDataCocooningStage>k__BackingField; // 0x4
private static System.Boolean <EnableForceDownloadNonDcsGunSkin>k__BackingField; // 0x8
...

// Methods
public static System.Int32 get_DefaultPlayerWeaponAmmoSize(); // 0x2cefa20
private static System.Void set_DefaultPlayerWeaponAmmoSize(System.Int32 value); // 0x2cefa78
public System.Void .ctor(); // 0x2cfd0b8
private static System.Void .cctor(); // 0x2cfd0c0
...
}

namespace Var {
struct {
bool isHighMagSize = false;

} MyMods;
}

void (*old_set_DefaultPlayerWeaponAmmoSize)(int value);
void new_set_DefaultPlayerWeaponAmmoSize(int value) {
if (Var::MyMods.isHighMagSize){
value = 100;
}
old_set_DefaultPlayerWeaponAmmoSize(value);
}


In my featNum...
case 1:
Var::MyMods.isHighMagSize = boolean;
break;


My Hook in //void hook_thread()...

UnityResolve::Hook(
OBFUSCATE("PlayerWeaponBase"),
OBFUSCATE("set_DefaultPlayerWeaponAmmoSize"),
{ "System.Int32" },
(void*)new_set_DefaultPlayerWeaponAmmoSize,
(void**)&old_set_DefaultPlayerWeaponAmmoSize);
 
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