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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 Jan 11
      • Report Tweet
      • Report NetzDG Violation

      How to boot an ARM64 Linux kernel: Put the binary in RAM and jump to it. How to boot an ARM64 Darwin kernel: Here's ASN.1 containing a mach-o containing two *different* styles of TLV just to find the entrypoint which is a VA then magically convert it to a PA somehow then papic.twitter.com/Fx2gSRaRFb

      6 replies 67 retweets 428 likes
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      Hector Martin‏ @marcan42 Jan 11
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      Who the hell decided that an array of tagged machine-dependent thread information structures within a (differently!) tagged list of linker commands was the correct way to encode the entrypoint of a binary in an executable format? Which is itself wrapped in ASN.1 of all things?

      8:29 AM - 11 Jan 2021
      • 3 Retweets
      • 75 Likes
      • Royce Williams Dinckel 🍉 (Jess’s) Jonathan Flusser Edu Renesto 🦀 Adrian Chadd Akhil Indurti SkyHunter Yrjänä Rankka @ghard@mastodon.social Cycletux 🇦🇶
      4 replies 3 retweets 75 likes
        1. Hector Martin‏ @marcan42 Jan 11
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          That's three *different* levels of *different* TLV styles, if you're keeping count.

          10 replies 1 retweet 62 likes
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        2. c0de‏ @c0degaf Jan 11
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          Replying to @marcan42

          ASN.1? 😂 But why?

          1 reply 0 retweets 0 likes
        3. Alexander Kyte‏ @ipvkyte Jan 11
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          Replying to @c0degaf @marcan42

          My developer senses say "string escaping". Someone will tell me I'm wrong but if I were to ask prying questions, at the bottom of it would be safer string escaping.

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. Alexander Kyte‏ @ipvkyte Jan 11
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          Replying to @marcan42

          This screams "a compiler made this". They're probably retiring handwritten code across their devices. Probably going to consolidate firmware or something. Generate all of this from configuration that is statically checked against LLVM.

          0 replies 0 retweets 1 like
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        2. Markus Läll‏ @markusparkus5 Jan 11
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          Replying to @marcan42

          Thought that ASN.1 was just for crypto stuff. Is it signed or something?

          1 reply 0 retweets 0 likes
        3. c0de‏ @c0degaf Jan 12
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          Replying to @markusparkus5 @marcan42

          It's also used in MIBs. https://en.m.wikipedia.org/wiki/Management_information_base …

          0 replies 0 retweets 0 likes
        4. End of conversation

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