• 297 Posts
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Joined 2 years ago
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Cake day: September 2nd, 2023

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  • Microcode is used to „patch” a CPU in case bugs are found and allows tweaks to very low level logic. From the original research paper it looks like understanding microcode is a challenge, let alone writing new microcode. In all likelihood this will be used for more research and reverse engineering of things that are trade secrets closed from public knowledge.

    Now that we have examined the vulnerability that enables arbitrary microcode patches to be installed on all (un-patched) Zen 1 through Zen 4 CPUs, let’s discuss how you can use and expand our tools to author your own patches. We have been working on developing a collection of tools combined into a single project we’re calling zentool. The long-term goal is to provide a suite of capabilities similar to binutils, but targeting AMD microcode instead of CPU machine code. You can find the project source code here along with documentation on how to use the tools.

    The zentool suite consists of tools for microcode patch examination including limited disassembly, microcode patch authoring using a limited amount of reverse engineered assembly, microcode patch signing, and microcode patch loading. We plan to also release details on how to decrypt and encrypt microcode patches in the future. A significant portion of the ongoing research is focused on building an accurate understanding of the AMD microcode instruction set – the current disassembly and assembly are not always accurate due to this challenge.




  • I was head mod of a national sub for 2 years so I’ll offer their perspective.

    Big subreddits are constantly attacked by clever ways to self promote. Your trust was broken so many times you were forced into cynicism. Your rules need to be simple and treat everyone equally. You don’t want to make too many judgment calls because they’re always controversial. You don’t want to spend that much time moderating because you’re not getting paid. You don’t have a way to increase your headcount because people who can mod are a precious resource. You have to maintain cohesion within moderation team because you’ll end up squabbling rather than gardening.

    But there are also mods that are just scared of losing power.




























  • It’s not about boosting anti-EU parties, I’m saying neither PiS nor KO led government did what’s necessary to unlock the funds. KO didn’t change any laws that are the issue, because it would be vetoed by the president. All that was done was essentially executive orders by minister of justice and various legal tricks that could be undone immediately if KO lost power. Things working on a whim of a single person without any checks and balances is not exactly rule of law.

    EU critics accused commission of withholding those funds based on sympathies alone and now they have very reasonable proof for just that. It’s not good long term, especially for deeper integration.


  • misk@sopuli.xyzOPtoEurope@feddit.deEU unblocks frozen funding for Poland
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    1 year ago

    It’s nice that we’ll be getting this money but…

    This is not a great look for the EU since we have not reached barely any of the milestones. We pinky promised to do so and are likely to achieve them in 2 years (after current presidential term), which is likely but not guaranteed. EU commission president and our prime minister (both EPP coincidentally) are supporting each other’s personal political goals which will be brought up by anti-EU crowd for sure. This screams lack of long term vision, again.






  • misk@sopuli.xyzOPtoEurope@feddit.deGermany legalises cannabis, but makes it hard to buy
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    1 year ago

    I think this is fine because while people should be allowed to do light drugs I don’t mind making them jump through some hoops so that it’s not that convenient. Alcohol and nicotine are definitely way too accessible and it affects perception of this law.

    I use cannabis in Poland where we accidentally legalized it by allowing doctors to prescribe it online which combined with corruption means anyone who wants it can get it but it’s not so obvious unless you’re interested. It’s a surprisingly OK compromise.