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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 25 Dec 2020
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      I was just reminded of this piece that I wrote ten years ago now. It is still just as relevant today as it was back then. If you are working on any kind of reverse engineered product for hardware, learn how to care about your users to keep them safe.https://marcan.st/2011/01/safe-hacking/ …

      2 replies 41 retweets 224 likes
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    2. Hector Martin‏ @marcan42 25 Dec 2020
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      That post speaks of 1.2 million installs of The Homebrew Channel, but I think these days we're closer to 10 million. Still zero bricks. We had one near miss, which was saved by the many layers of safety-in-depth I had built in, based on the principles I wrote about there.

      1 reply 3 retweets 68 likes
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    3. Hector Martin‏ @marcan42 25 Dec 2020
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      Thankfully the Apple Silicon macs are largely brick-proof*, though restoring them currently requires another Mac. Making this work from Linux is also a project goal. * I'm sure you can if you try hard enough, and I'll try hard to never go anywhere near there, of course.

      2 replies 0 retweets 40 likes
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    4. Asaf‏ @k3kh4x 25 Dec 2020
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      Replying to @marcan42

      You can probably brick those by deleting SysCFG (where the SN and stuff is stored, not sure if it works the same as on iThings)

      1 reply 0 retweets 1 like
      Hector Martin‏ @marcan42 25 Dec 2020
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      Replying to @k3kh4x

      I hope that stuff, if it's stored on the NVMe/SSD along with everything else, is hidden from the OS view (or at least read only)... I'm not sure how it works on the latest iDevices.

      4:40 AM - 25 Dec 2020
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      • Patrik Asaf
      1 reply 0 retweets 2 likes
        1. New conversation
        1. Longhorn‏ @never_released 25 Dec 2020
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          Replying to @marcan42 @k3kh4x

          You are protected from within macOS with SIP, which protects those system resources. From the shell in macOS Recovery or with SIP off, you’re expected to know what you are typing.

          1 reply 0 retweets 4 likes
        2. Siguza‏ @s1guza 26 Dec 2020
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          Replying to @never_released @marcan42 @k3kh4x

          I know on iOS it doesn't get the normal blockdev adapter, but some "diagnostics readonly" one. IIRC with Project Sandcastle you get it exported as a blockdev though... might be wise to force that to readonly in the kernel :|

          0 replies 0 retweets 2 likes
          3. End of conversation

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