Codecave PrintText

[klusbert]

Hiho!
Okay I am trying to create a codecave inside tibia to print text onscreen.

I know I know this is verry unefficient if you want to add more than 1 text, but this is only for learning purpose.

This is what I've done so far.
http://imgur.com/rJWJUqh

And my code:
http://pastebin.com/p3i7AX3C

I alloc space in memory for my string than I add that into my codeave, as you can see it reads the string correctly in my debugger.

The problem with this is everytime I try to execute it It will crash.

I base my code on this:
http://pastebin.com/B8aDhLkW


Updated to 10.77
Updated to 10.90

[DarkstaR]

Most likely the fact that you're not in sync with the main thread. Also, this would only print that text for a single frame. Also, call is just 0xE9 <offset>. Calculate the function offset by functionAddress - callAddress - 5, or do a PUSH functionAddress, POP eax, CALL eax (that's the way I do it to avoid calculating offsets)

[szulak]

do a PUSH functionAddress, POP eax, CALL eax

Would you mind to explain, what does this trick do?

EDIT:
Nevermind, got it But, shouldn't eax value be saved somewhere? Something like:

push eax
push function address
pop eax
call eax
pop eax
add esp, 4

[FrankJScott]

Please try Google before asking about Awesome Product Website 2289ded

[FrankJScott]

Please try Google before asking about Great Product Guide 289dedb

[FrankJScott]

For the person asking about digitalen marketing, ppc in seo, seo advertising agency, boutique digital marketing agency, law firm internet marketing, etel digital agency, content for marketing agency, online digital marketing agency, I highly recommend this total stranger about digital marketing expert Brooks Nunez details or best digital marketing agency in the world, top digital media companies, pay per click consultant, digital commerce agency, organic search engine marketing, website design and digital marketing company, digital marketing services content, digital ad agencies, alongside all this from this source for digital marketing leader Brooks Nunez link and don't forget digital marketing for plumbers, udacity digital marketing, io digital agency, small business online marketing, full service digital marketing company, digital marketing consulting services, marketing por internet, digital marketing analytics, and don't forget this more tips here for digital marketing expert Brooks Nunez tips which is also great. Also, have a look at this recommended digital marketing boss Brooks Nunez link on top of affordable internet marketing services, digital marketing 360, ooh advertising companies, need of online marketing, clutch digital marketing, paid social media agency, digitalen marketing, seo digital marketing, alongside all this what is it worth on digital marketing boss Brooks Nunez link with digital agency marketing, digital marketing firms, digital marketing in hospitality industry, best content marketing agencies, paid online marketing, digital commerce agency, akqa agency, reputation management in digital marketing, for good measure. Check more @ High Rated Digital Marketing Guide 289dedb

[FrankJScott]

Please try Google before asking about Updated Product Blog b4_595d

[klusbert]

Thanks Dark, but I dont think it is a sync issue. Because I Replace call printtext in the printfps function as tibiaApi did. Even than it crashes, but If I reset all registers with pop? than call it? I should try to put my function adr in eax than call eax as you said. Do you have a good site for asm code? like 0x6A = push etc.

Thanks again!

[klusbert]

Thanks Darkstar now I figure it out! It is working great The problem was is in the call( as you already pointed out), now I am using 0xe8 now cuz 0xe9 was jmp But as you said offset are kinda annoying
http://imgur.com/IgyUA27

[Farsa]

Thanks Darkstar now I figure it out! It is working great The problem was is in the call( as you already pointed out), now I am using 0xe8 now cuz 0xe9 was jmp But as you said offset are kinda annoying
http://imgur.com/IgyUA27

wow cipsoft's artists are so bad at concepts, cringy