[Disassembly] Cannot find offset of function that exists

th7nder · **Author**

Hi guys! I want to make no-recoil, i've already handled client-side, it's perfect but i want to make server-side quite accurate to client, so i looked up some source code of cs go, and all i need to do is block function from class CBaseEntity -> ViewPunch, but i cannot find it's offset on newest linux binary of cs go. Function exists but when i dumped vtables of CBaseEntity and CBasePlayer offset was not there.

I'll be very grateful for help,
Best Regards,
th7nder

Miu · *Last edited by Miu; 08-01-2015 at 09:11.*

it's non-virtual hun

edit: i'm guessing there are already easy methods to do no recoil so idk what point is anyway

th7nder · *Last edited by th7nder; 08-01-2015 at 09:35.*

I haven't found that easy methods yet, believe me i tried some, if you know about them, i am more than willing to find out about them (;

// edit, also found these but dunno how to hook them

Miu · 08-01-2015 , 16:39 Re: [Disassembly] Cannot find offset of function that exists

you hook non-virtual methods by getting the first bytes in a function and constructing a signature

th7nder · 08-01-2015 , 17:15 Re: [Disassembly] Cannot find offset of function that exists

Could u gave any example of this? I found csgo_movement_unlocker which uses signatures, but it only patches bytes on 'em not hook and supercede.

Miu · 08-01-2015 , 17:26 Re: [Disassembly] Cannot find offset of function that exists

you look at the numerical instructions at the start of the function (i think ida has like byte view if you're using that), and write like, 10-20 bytes down

th7nder · 08-01-2015 , 20:13 Re: [Disassembly] Cannot find offset of function that exists

Yeah it's possible, but i want to do it for player individually, not for whole server

Miu · 08-01-2015 , 20:57 Re: [Disassembly] Cannot find offset of function that exists

so while it's possible to construct a new hooked vtable for a specific player or however you intended that to work, you can't do that for non-virtual methods since they're statically called. you need to just hook it normally and check if the CBaseEntity (the this pointer) in the hook is your player.

psychonic · 08-01-2015 , 21:03 Re: [Disassembly] Cannot find offset of function that exists

Use the SendProxy extension to hook changes to m_viewPunchAngle and reset it in the cases that you want.

th7nder · *Last edited by th7nder; 08-01-2015 at 21:44.*

Ok I figured out no-recoil while standing, but when moving it totally doesn't work cause m_viewPunchAngle's csgo version doesn't make a difference while moving, so i think need to hook CCSWeaponInfo::GetInaccuracyMove, but i don't think that it contains m_hOwnerEntity in itself, cause InaccuracyMove is taken from weapon scripts

@Miu, you're very helpful (;