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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. Hector Martin‏ @marcan42 5 Mar 2019
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      Okay, this *desperately* needs IDA's 'highlight everything that matches whatever the cursor is over' thing though. If this isn't implemented (and I just haven't found it yet), this is the very first feature I'd add.pic.twitter.com/dWi6Lsr3Hz

      3 replies 3 retweets 20 likes
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    2. Hector Martin‏ @marcan42 5 Mar 2019
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      Ah, you can *manually* trigger it to do backwards or forwards data flow analysis, which is really cool. But I still kind of would rather it do a dumb text match by default without any additional clicks.pic.twitter.com/XbRdgX3NaW

      1 reply 3 retweets 12 likes
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    3. Hector Martin‏ @marcan42 5 Mar 2019
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      You can map them to hotkeys though. I could get used to this workflow, but it's too strict (e.g. doesn't work for globals). I just want a dumb "highlight all the same symbol/text" thing...

      2 replies 1 retweet 4 likes
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    4. Hector Martin‏ @marcan42 5 Mar 2019
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      Very cool that it has this "project" concept with a bunch of associated files, and you can link them together (e.g. follow refs from one DLL to another).pic.twitter.com/4H9itAtJ8V

      1 reply 0 retweets 8 likes
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    5. Hector Martin‏ @marcan42 5 Mar 2019
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      And it's not just an ugly hack that loads another file; the history is seamless, you can go back to where you came from. Cool.

      1 reply 0 retweets 6 likes
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    6. Hector Martin‏ @marcan42 5 Mar 2019
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      All the keybindings are configurable, and some of the defaults are just dumb (this used to be Ctrl-Shift-F), so let's fix that.pic.twitter.com/BAAoSaWDVc

      2 replies 1 retweet 9 likes
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    7. Hector Martin‏ @marcan42 5 Mar 2019
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      Hector Martin Retweeted Ekho

      Hah, figures it had to be in there somewhere. Honestly it should just do this by default, but I'm cool with middle mouse.https://twitter.com/0Ekho/status/1103191269029736448 …

      Hector Martin added,

      Ekho @0Ekho
      Replying to @marcan42
      I've seen the same complaint a few other places, apparently you just have to click middle mouse?
      2 replies 0 retweets 10 likes
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    8. Hector Martin‏ @marcan42 5 Mar 2019
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      The dark theme is... questionable, mostly because Java. It makes the menu bar unreadable. Oh well, I guess I can live with a light theme for now. Someone will probably get annoyed enough to fix this at some point.

      2 replies 0 retweets 11 likes
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    9. Hector Martin‏ @marcan42 6 Mar 2019
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      Ah, this is a bit sad. It doesn't know that __chkesp() does not touch ST0, which breaks dataflow analysis of float return values. I can't find a sane way to override it that doesn't involve declaring it as taking a float and returning a float, which would affect *every* call.pic.twitter.com/3IQPnlWFKE

      1 reply 1 retweet 6 likes
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    10. Hector Martin‏ @marcan42 6 Mar 2019
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      I wonder if there's a way of customizing clobbers... if it knew __chkesp() does not clobber ST0 it would work. I can make it take an arg at ST0 and return in ST0 and at least get the dataflow, but then that gunks up every function that *doesn't* return a float...

      3 replies 0 retweets 7 likes
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      Hector Martin‏ @marcan42 6 Mar 2019
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      Fixed it. You can define your own calling conventions easily enough by editing Ghidra/Processors/x86/data/languages/x86win.cspec. I just defined a __fastcall_nofloat that doesn't kill float regs, and it works now.pic.twitter.com/FbwgyQ4dqC

      12:35 AM - 6 Mar 2019
      • 5 Retweets
      • 39 Likes
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      3 replies 5 retweets 39 likes
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        1. Anisse‏ @Aissn 6 Mar 2019
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          Replying to @marcan42

          What's the link between __checkesp and __fastcall_nofloat ?

          1 reply 0 retweets 0 likes
        2. Hector Martin‏ @marcan42 6 Mar 2019
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          Replying to @Aissn

          You just go to Edit Function Signature on __checkesp and set it to __fastcall_nofloat (after adding that XML to the config file, it's just a copy of __fastcall with all mentions of ST0 removed).

          1 reply 0 retweets 2 likes
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        1. Daniel Bilar‏ @daniel_bilar 6 Mar 2019
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          Replying to @marcan42

          @threadreaderapp kindly unroll

          1 reply 0 retweets 0 likes
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        1. Jeremy Mill‏ @living_syn 6 Mar 2019
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          Replying to @marcan42

          Gonna submit a PR when it's open sourced?

          0 replies 0 retweets 0 likes
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