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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Sera Tonin Brocious‏Verified account @daeken 25 May 2020
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      Replying to @ilfak @marcan42

      FWIW, I've been using IDA for over 15 years and there's a 0% chance I'd buy IDA Home. I have the IDA interface in my muscle memory, but that license is laughably bad. Ghidra and Hopper may not be as good as IDA, but I'm moving over to them fully.

      2 replies 0 retweets 43 likes
    2. Ilfak Guilfanov‏ @ilfak 25 May 2020
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      Replying to @daeken @marcan42

      Don't cut off your nose to spite your face. But seriously, use whatever tool you like and be happy. IDA Home is the most affordable of our licenses, and as the replacement of IDA Starter it is great.

      2 replies 0 retweets 0 likes
    3. Ender Cypher‏ @King4q1 25 May 2020
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      Replying to @ilfak @daeken @marcan42

      All of your licenses are horrific & overpriced af so either make them affordable again or maybe shut the entire thing down because ghidra is a thousand times better & that’s why I’m swapping.

      2 replies 1 retweet 2 likes
    4. Daax Rynd‏ @daax_rynd 25 May 2020
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      Replying to @King4q1 @ilfak and

      In what ways is Ghidra better? Genuinely curious what I'm missing here because I thoroughly enjoy IDA despite some annoying shortcomings that are typically associated with anti-RE strategies (so their mishandling makes sense).

      3 replies 0 retweets 0 likes
    5. Hector Martin‏ @marcan42 25 May 2020
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      Replying to @daax_rynd @King4q1 @daeken

      Well, IDA only has undo because Ghidra did and Hex-Rays went into panic mode to add that feature after decades of saying it was "too hard". So whether you use Ghidra or not, thank it for that :-) Really though, each one has its pros and cons.

      1 reply 0 retweets 1 like
    6. Daax Rynd‏ @daax_rynd 25 May 2020
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      Replying to @marcan42 @King4q1 @daeken

      No shit, everything comes with pros and cons. I've yet to see a comprehensive or even somewhat well constructed comparison of the two when I've asked why one is better than the other. I don't use Ghidra, but given this I'm tempted since I can never get a real answer out of users.

      1 reply 0 retweets 1 like
    7. Hector Martin‏ @marcan42 25 May 2020
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      Replying to @daax_rynd @King4q1 @daeken

      Personally, I haven't been doing a ton of RE lately so I can't point at little features, but what I find most interesting in Ghidra's design is the declarative processor definitions. It means you can write a spec for a processor's opcodes, and then it knows how to decompile it.

      2 replies 0 retweets 1 like
    8. Daax Rynd‏ @daax_rynd 25 May 2020
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      Replying to @marcan42 @King4q1 @daeken

      That's a great feature too. If that's unavailable in IDA as simply as it is in Ghidra then that would certainly be a +1 for Ghidra.

      1 reply 0 retweets 0 likes
    9. Hector Martin‏ @marcan42 25 May 2020
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      Replying to @daax_rynd @King4q1 @daeken

      As far as I know, for IDA you need to write actual code (e.g. most asm-only processor modules are IDAPython, and thus way slower than built-in or C ones), and I'm not sure if you can literally implement new backends for the decompiler that way. Certainly not in the past.

      1 reply 0 retweets 0 likes
    10. Hector Martin‏ @marcan42 25 May 2020
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      Replying to @marcan42 @daax_rynd and

      Example of how the declarativeness of Ghidra makes things easy: I ran into an issue with a Win32 stack check function being assumed to clobber the FP stack, breaking dataflow analysis for functions that return floats. Fixed by editing an XML file to add a new calling convention.

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 25 May 2020
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      Replying to @marcan42 @daax_rynd and

      (I also filed a bug, because it would be much more convenient if that were a configurable override in the per-function calling convention UI, which requires actual code changes to implement, but the point is I *could* fix it without touching the code and keep reversing.)

      10:25 PM - 25 May 2020
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Hector Martin‏ @marcan42 25 May 2020
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          Replying to @marcan42 @daax_rynd and

          On that note, I find Ghidra's UI experience for editing datatypes, calling conventions, and argument lists to be a lot nicer than IDA's. With IDA I was always stuck trying and failing to come up with a function prototype that was interpreted how I want. Ghidra has a nice editor.

          1 reply 0 retweets 0 likes
        3. Ender Cypher‏ @King4q1 25 May 2020
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          Replying to @marcan42 @daax_rynd @daeken

          It’s also extremely hard to write a constructed list whenever the licenses are so damn expensive I can’t even use one legally let alone a up to date one.

          0 replies 0 retweets 0 likes
        4. End of conversation

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