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 Forums >>  IDA Pro  >>  Problem with analyis - call near ptr

Topic created on: December 5, 2006 10:58 CST by oscarjones .

I have a binary that I am trying to analyze. IDA seems to interpret some of the instructions as "call [near|far] ptr XX" with a bogus address. My solution so far has been to undefine, which leaves something like this:

                db ABh
unk_00000001    db CDh
                db EFh


And so on.  Moving the cursor down one row and choosing "code" seems to analyze it correctly. All throughout the code there are little bits like this that need fixing.

Is this the correct way to fix the incorrect analysis, or should I be doing something different?

  winroot   December 7, 2006 10:33.19 CST
at unk_00000001  keydown"A"

  Nevar     December 10, 2006 04:17.09 CST
Chances are that you're dealing with obfuscated code, where various constructs are being used which IDA auto-analysis often gets wrong.  Typically, unless you have appropriate scripts or plugins you'll have to correct what IDA does manually.

Without more contextual information it's difficult to make any other suggestions.

-nevar

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