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Index > Linux > Getting String Length from Scas

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donn



Joined: 05 Mar 2010
Posts: 180
donn
Hi just wondering how to be able to print a strings length to a console. Using scas and printf. I was able to print immediate values, but having a little difficulty passing rcx(?)'s value to printf. I attached some code that prints a value of '6293840'' to the screen. I tried setting up the trailing zero but this string length number is getting all garbled. Just trying to get familiar with using scas.

Ok everyone,
Denat


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Post 05 Dec 2010, 01:49
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Endre



Joined: 29 Dec 2003
Posts: 212
Location: Budapest, Hungary
Endre
There are multiple errors in your code, somewhere even the comment is wrong, but your main problem is that before calling to printf you load the address of 'Result' and not its content in esi (you know the rule: 'pass by value').
Post 07 Dec 2010, 18:49
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donn



Joined: 05 Mar 2010
Posts: 180
donn
Hi, I dont know at all if this is the file I was editing before (the newest version), but I definitely got some results I was hoping for. This file may not be up to date, but I attached some file that I think got it to work, according to what you pointed out. Have to pass rsi the address.. I havent gotten that rule completely figured out yet...

Thanks a lot,
Denat

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Post 10 Jan 2011, 22:59
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