Flag: Tornado! Hurricane!

 Forums >>  IDA Pro  >>  How to create data structure which contains x86 instruction in it?

Topic created on: December 30, 2011 02:19 CST by Pinczakko .

Is it possible to create data structure which contains  instructions in IDA Pro? In this case the particular data structure contains a relative jump. I've tried several combinations,mostly playing with IDA Pro structure offset-type. But, none of the works. Google doesn't yield anything useful either.

  prot0man   March 5, 2012 19:04.35 CST
It depends on how you're wanting to represent the instructions. Since assembly instructions are really just range from 1 to 8 byte long sequences of numbers called op codes, it should be natural to represent each instruction as a number. It might be best to make a structure called Instruction which contains an array of integers of MAX_INT size (let's say MAX_INT is 12 bytes to account for prefix instructions like rep) and then a second field to represent how many opcodes are actually used in this array. This probably isn't the most efficient approach, but it should be simple enough. Anyway I'm not sure what you're hoping to do with this structure, but what I've provided you with is one way of representing insturctions.

  Pinczakko     March 11, 2012 13:28.00 CDT
Hi, thanks prot0man. It's a good idea. Actually, I was working with BIOS structures which sometimes contain instruction in them. Last time I decided to split the structure into two (between the instruction part), because the instruction contains a jump into the real code.

Note: Registration is required to post to the forums.

There are 28,631 total registered users.


Recently Created Topics
windbg - olly/immunity
May/14
Reverse a WinRAR pac...
May/13
Add comments to resu...
May/10
can we code script ...
May/09
Type Casting Structu...
May/07
How to Reverse Engin...
May/03
Sulley on OS X (10.7)
May/01
Help me guys
May/01
IDA Resource Viewer ...
Apr/28
How do i use plugins...
Apr/27


Recent Forum Posts
windbg - olly/immunity
blowcheck
Help me guys
Olivier
Reverse a WinRAR pac...
NirIzr
windbg - olly/immunity
anonymouse
Reverse a WinRAR pac...
DriEm
Add comments to resu...
phn1x
IDA Resource Viewer ...
DriEm
Add comments to resu...
qiuhan
IDA Resource Viewer ...
waleeda...
IDA Resource Viewer ...
DriEm


Recent Blog Entries
waleedassar
Apr/20
OllyDbg NumberOfSections Crash

icegood
Apr/13
Advanced labels plugin for ...

waleedassar
Mar/31
GetModuleFileNameEx And Inf...

waleedassar
Mar/31
OllyDbg v1.10 And Wow64

waleedassar
Mar/29
OllyDbg Resource Table Pars...

More ...


Recent Blog Comments
raxen on:
Mar/27
Anti-Dumping

Dallas on:
Mar/22
ChapljaVM Code Obfuscator

Dallas on:
Mar/22
Hack stuff, get paid

Dallas on:
Mar/22
Exe Packer TAGGANT system f...

Dallas on:
Mar/22
Olly2 SystemTray Plugin

More ...


Imagery
SoySauce Blueprint
Jun 6, 2008

[+] expand

View Gallery (11) / Submit