[Despirator]

Can somebody point me out on how to patch a value



I want to thange the value below the gray line

[asherkin]

Address gamedata to find where to patch and then StoreToAddress with your patch.

[Despirator]

Originally Posted by asherkin Address gamedata to find where to patch and then StoreToAddress with your patch.

I have already found the address and I need to find out the offset. I pointed to push eax offset and have changed it. But the lower value crashes the server and the higher value set to unexpected result

[asherkin]

I think what you are trying to do is a lot more complex than you think it is, you'll need to learn the ins and outs of x86 assembly and calling conventions - even more so than most because you are trying to patch the middle of a function call. I feel this may be a bit of an XY problem, your post made it sound like you knew what to change just not how to do it.

[Robotex]

Messing with the push opcodes is almost never a good idea unless you know what you're doing, you will end up screwing the stack which means a sure crash sooner or later.

[Despirator]

Originally Posted by asherkin I think what you are trying to do is a lot more complex than you think it is, you'll need to learn the ins and outs of x86 assembly and calling conventions - even more so than most because you are trying to patch the middle of a function call. I feel this may be a bit of an XY problem, your post made it sound like you knew what to change just not how to do it.

I've just started to learn memory patching so I'm new there
I'm trying to change players count always showing 0 or at least 1 in the A2S_INFO queries (I now that Valve legacy master servers avoids this. But it is not for it though). I've succeded on the windows (I may be wrong on patching there anyway) but not linux.

Attached the test plugins I've used to. I'll be pleased if you point me out on how to patch the correct offset so it should show always 0.

Also this thread maybe as a tutorial for other people on the forum like me

[Despirator]

Originally Posted by Robotex Messing with the push opcodes is almost never a good idea unless you know what you're doing, you will end up screwing the stack which means a sure crash sooner or later.

yep. I did it. And changed the patch offset to previous bytes to mov