@PetrBenes

upper-mid-low-level

 Brno, Czech Republic
github.com/wbenny
Joined September 2009
  • Tweets1.4K
  • Following398
  • Followers3.6K
67Media
Excited to share vmi-rs - a batteries-included, easy-to-use and fast framework for Virtual Machine Introspection in Rust! Built from scratch. Optimistically aiming to address some long-standing issues in the VMI space. github.com/vmi-rs/vmi 🧵

GitHub - vmi-rs/vmi: Modular and extensible library for Virtual Machine Introspection

Modular and extensible library for Virtual Machine Introspection - vmi-rs/vmi

github.com
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I had many reasons I liked and did participate in open-source and all of the reasons pretty much flopped. For better or worse.
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Most recent macOS 27 running in KVM/qemu. On non-Apple hardware (DGX Spark in this case). KVM wasn't patched at all.
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Who would've thunk that objdump and grep is all we ever needed.
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I gradually care less and less what tech stack someone uses. But if I see you wear Arcteryx, Imma judge u.
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Clear protein and creatine tablets are the best thing that I've discovered this year. What turned my stomach became a really pleasant ritual I look forward to.
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Someone renting my apartment isn't responding to emails and texts for weeks. Yet I see them active on github. Would it be too much if I opened a PR?
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Petr Beneš retweeted
Milánkovo@Milankovo001Aug 22
END THE OPPRESSION OF BAD UX! No reverse engineer shall dig through Options / General / OK to show opcode bytes. Nor again for stack deltas. Nor a third time because graph view keeps its own settings. Ctrl+Shift+B. Ctrl+Shift+S. ¡VIVA LA REVOLUCIÓN! github.com/milankovo/listing…
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haha
Petr Beneš@PetrBenes19 Sep 2023
I'm pretty much convinced that extensively (ab)using Copilot/GPT can eventually degrade one's ability to think on their own. Balancing the usage will be crucial to stay sharp. I wonder if we'll witness an "addiction epidemic" similar to that of socmedia.
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Are interview processes catching up with current trends or do they still mostly contain live coding? I'm seeing lots of "I didn't write a single line of code in X months" and I can't imagine going through live coding after that.
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OpenAI should sneak "you're an expert ophthalmologist" into the system prompt ASAP.
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I thought the watermarking was already there for a long time, with all the honest load-bearing smoking guns, and you're absolutely rights.
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impressive! bro must be swimmin in dopamine
NTDEV@NTDEV_Aug 9
I can declare: WINDOWS 10 ARM64 HAS SUCCESSFULLY BOOTED ON A SAMSUNG GALAXY S9+!
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If we don't see a completely new major OS on the market in the next 10 years (one that's not based on any existing kernel), I'll be really sad.
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Now that reasoning is outsourced, we can finally think about what's truly important. Our feelings.
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The analogy would work if your employer allowed you to use the compiler 200 times a month, you weren't able to run it on a consumer hardware and it had outage once in a while.
Antonio Sarosi
@antoniosarosiJul 13
Before C, someone writing assembly would say "hand-writing" assembly is fun. Before Java someone would say manually allocating memory in C is fun. Just accept that coding has been abstracted and it will not come back, the minimum building block now is architecture components.
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> Many people are there for money I've yet to meet a person who's in programming for money. I know people who tried, but everyone bailed. And, if you're after money, why choose programming, when there's plenty of other fields that pay more with far lower entry barrier.
AstraKernel 💫
@AstraKernelJul 14
> large % of programmers don’t actually like computers. True. Many people are there for money > I don’t get it, at ALL. Don’t you *LIKE* understanding the magic of the machine? Some of us still do but doesnt mean you have to do all the time "hand"-programming
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Was there any reason MS decided not to ship win32k types in PDBs after the driver split? Or they just felt like it?
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Petr Beneš retweeted
Yarden Shafir@yarden_shafirJul 9
First post in the series: a quick explanation of the PreviousMode mitigation added in 23H2: windows-internals.com/random…
Yarden Shafir@yarden_shafirJul 9
Gonna start a new blog series where I document small Windows features/changes/techniques that I couldn't find documented anywhere. I have a few ideas already but is there anything you'd like me to write about?
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Petr Beneš retweeted
Niklas Gögge
@dergoeggeJun 25
Is it possible to get a virtual machine to halt at a precise instruction count? Answering this question took some time, but I think the answer is yes (with minimal single stepping).
Brink@bitcoinbrinkJun 25
Replying to @bitcoinbrink
Niklas (@dergoegge) outlines an approach and a solution, bedrock, for this problem of determinism. He focuses on the challenge of emulating time and pausing a VM at an exact instruction count, something CPUs aren't designed to do. brink.dev/blog/2026/06/25/be…

Introducing Bedrock: A Deterministic Hypervisor

Bedrock: A general solution to achieving full determinism in software testing by building a deterministic hypervisor to emulate time and trigger virtual machines to exit at precise instruction counts.

brink.dev
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Why did ntdll!RtlRestoreContext start to call NtContinue somewhere around Win10, instead of using simple iret? I suspect it has something to do with security (XFG, possibly?), though it would be nice to have it confirmed from someone who knows more about it.
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