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Thread: Jump analysis

  1. #1
    peterg70
    Guest

    Jump analysis

    Would like to see a plugin that scans slightly ahead for JE JNE statements while the current instruction is being analysed (CMP or TEST etc)

    Then it would turn on the jump path that the current test would result.

    i.e.
    instructions are
    mov eax,01
    test ax,ax
    JE +2 instructions

    When the EIP is a test command this would then scan forward for the next JE/JNE/etc and show in ollydbg where this would lead to.

    Currently ollydbg only shows the jump details when your actually on the jump.
    You might have to turn this option on in Options/CPU/Show Jump path.

    Any thoughts
    peterg70
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  2. #2

    Jump analysis

    peterg70: you are free to make one
    ::hint - use _ODBG_Pluginmainloop, but be aware that your code must be very quick or else it will slow down OD to a crawl.

    anyway, a nice ideea. a pitty that i dont have time to experiment

  3. #3
    peterg70
    Guest

    Jump analysis

    If we are single stepping through the code this shouldn't need to slow down Ollydbg at all as it is only performed if single stepping through code and once per instruction Or is some parameter is changed.

    Wish I had time to create one. Just offerred the idea to someone who has the time and effort to do it.
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  4. #4
    Anonymous
    Guest

    Jump analysis

    Ah yeah, and that olly crack program for you alone :-(
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  5. #5
    peterg70
    Guest

    Jump analysis

    Sorry what the hell do you mean by

    Olly Crack program ?????????

    How about using a nickname rather than anonymous

    peterg70
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  6. #6

    Jump analysis

    peterg70: he meant, that Olly plugin will crack the program for you

  7. #7
    peterg70
    Guest

    Jump analysis

    @TBD

    Did I miss something I said. I never mentioned cracking.

    I jsut have a hard time trying to predict the what the next jump instruction is going to do.

    so if I am on a CMP ax,01 and the next instruction is JLE x02 I thought that the plugin would look at the current instruction and work out what the answer will be and then go to the JLE and show where its going to branch too.

    Maybe using the internet has reduced the amount of typing I do but I still don't understand what he meant.

    The olly plugin is a display only plugin for analysis. I.e. On the fly analysis.

    My 2 cents worth
    peterg
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  8. #8

    Jump analysis

    peterg70: i think everyone becamed too lazy to write plugins (including me), it is better to wait for OD 2.0 and then complain that this features is not included, ...

    .zZ

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