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Writing an operating system kernel from scratch – RISC-V/OpenSBI/Zig

news.ycombinator.com Uros Popovic 2025-09-25 06:36:23

Posted on: September 13, 2025 | at 09:30 AM Follow @popovicu94 I recently implemented a minimal proof of concept time-sharing operating system kernel on RISC-V. In this post, I’ll share the details of how this prototype works. The target audience is anyone looking to understand low-level system software, drivers, system calls, etc., and I hope this will be especially useful to students of system software and computer architecture. This is a redo of an exercise I did for my undergraduate cours

Topics: interrupt kernel sp stack thread

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Here’s How to Deflect a Dangerous Asteroid Without It Totally Backfiring

gizmodo.com Passant Rabie 2025-09-27 23:30:14

In September 2022, NASA deliberately crashed a spacecraft into an asteroid, successfully altering the space rock’s trajectory. The orbital shove demonstrated an asteroid deflection technique that could come in handy if a massive rock were headed in Earth’s direction. As it turns out, however, deflecting a potentially threatening asteroid is only half the battle. Striking an asteroid for deflection purposes could send it back on a collision course with Earth, merely delaying the planet-shatterin

Topics: asteroid earth impact rock trajectory

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Self-propagating supply chain attack hits 187 npm packages

bleepingcomputer.com Unknown 2025-09-28 03:46:43

Security researchers have identified at least 187 npm packages compromised in an ongoing supply chain attack, with a malicious self-propagating payload to infect other packages. The coordinated worm-style campaign dubbed 'Shai-Hulud' started yesterday with the compromise of the @ctrl/tinycolor npm package, which receives over 2 million weekly downloads. Since then, the campaign has expanded significantly and now includes packages published under CrowdStrike's npm namespace. From tinycolor to

Topics: attack chain compromised npm packages

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BlackBerry Passport getting set to follow Classic with a new life on Android

androidauthority.com Unknown 2025-09-28 11:28:53

Blackberry The original BlackBerry Passport TL;DR The team behind BlackBerry Classic’s Android revival is now working on a similar project for the BlackBerry Passport. Zinwa Technologies, the team behind the project, plans to sell DIY kits that will allow users to run Android on the Passport. The kits aren’t available immediately, but will be available sometime in 2026, which is slightly disappointing. Old, discarded BlackBerry phones are having a renaissance moment. We recently witnessed an

Topics: android blackberry classic passport zinwa

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Self-Replicating Worm Hits 180+ Software Packages

krebsonsecurity.com Unknown 2025-09-28 11:08:02

At least 187 code packages made available through the JavaScript repository NPM have been infected with a self-replicating worm that steals credentials from developers and publishes those secrets on GitHub, experts warn. The malware, which briefly infected multiple code packages from the security vendor CrowdStrike, steals and publishes even more credentials every time an infected package is installed. The novel malware strain is being dubbed Shai-Hulud — after the name for the giant sandworms

Topics: attack code npm packages said

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DuckDB 1.4.0 LTS

news.ycombinator.com The Duckdb Team 2025-09-28 13:01:06

Announcing DuckDB 1.4.0 The DuckDB team · 7 min TL;DR: We're releasing DuckDB version 1.4.0, codenamed “Andium”. This is an LTS release with one year of community support, and it packs several new features including database encryption, the MERGE statement and Iceberg writes. We are proud to release DuckDB v1.4.0, named “Andium” after the Andean teal (Anas andium), which lives in the Andean highlands of Colombia, Venezuela and Ecuador. In this blog post, we cover the most important updates f

Topics: duckdb iceberg release support using

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Trucker built a scale model of NYC over 21 years

news.ycombinator.com Https 2025-09-28 15:20:11

Reno may be “the biggest little city in the world,” but it's got some serious competition from the miniature New York City that hobbyist Joseph Macken built in his upstate New York basement over two decades. “I sat down in my basement, turned the camera on on my phone and just started talking about my first section, which was Downtown Manhattan,” the Clifton Park resident said on a recent Thursday about his viral TikToks on his roughly 50-by-30-foot scale model of the city. “It just took off.” T

Topics: building city macken model said

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One Vigilante, 22 Cell Tower Fires, and a World of Conspiracies

wired.com Brendan I. Koerner 2025-09-28 12:00:00

As dawn spread over San Antonio on September 9, 2021, almond-colored smoke began to fill the sky above the city’s Far West Side. The plumes were whorling off the top of a 132-foot-tall cell tower that overshadows an office park just north of SeaWorld. At a hotel a mile away, a paramedic snapped a photo of the spectacle and posted it to the r/sanantonio subreddit. “Cell tower on fire around 1604 and Culebra,” he wrote. In typical Reddit fashion, the comments section piled up with corny jokes. “B

Topics: 5g attacks conspiracy smith violence

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Self Propagating NPM Malware Compromises over 40 Packages

news.ycombinator.com Unknown 2025-09-29 04:22:03

Executive Summary The NPM ecosystem is facing another critical supply chain attack. The popular @ctrl/tinycolor package, which receives over 2 million weekly downloads, has been compromised along with more than 40 other packages across multiple maintainers. This attack demonstrates a concerning evolution in supply chain threats - the malware includes a self-propagating mechanism that automatically infects downstream packages, creating a cascading compromise across the ecosystem. The compromised

Topics: aws github npm packages secrets

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One Vigilante, 22 Cell Towers, and a World of Conspiracies

wired.com Brendan I Koerner 2025-09-29 03:00:00

As dawn spread over San Antonio on September 9, 2021, almond-colored smoke began to fill the sky above the city’s Far West Side. The plumes were whorling off the top of a 132-foot-tall cell tower that overshadows an office park just north of SeaWorld. At a hotel a mile away, a paramedic snapped a photo of the spectacle and posted it to the r/sanantonio subreddit. “Cell tower on fire around 1604 and Culebra,” he wrote. In typical Reddit fashion, the comments section piled up with corny jokes. “B

Topics: 5g attacks conspiracy smith violence

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Experimental browser MMO with bots, boss fights and power-ups

news.ycombinator.com Unknown 2025-09-25 12:55:38

Instant Access No downloads, no waiting. Click and play immediately in your browser on any device.

Topics: access browser click device downloads

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Show HN: Pooshit – Sync local code to remote Docker containers

news.ycombinator.com Unknown 2025-09-29 00:46:19

Pronounced Push-It.... I'm a lazy developer for the most part, so this is for people like me. Sometimes I just want my local code running in live remote containers quickly, without building images and syncing to cloud docker repos or setting up git workflows or any of the other draining ways to get your code running remotely. With pooshit (and a simple config file), you can simply push your local dev files to a remote folder on a VM then automatically remove relevant running containers, then b

Topics: code containers docker like running

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Show HN: Pooshit – sync local code to remote Docker containers

news.ycombinator.com Unknown 2025-09-29 10:46:19

Pronounced Push-It.... I'm a lazy developer for the most part, so this is for people like me. Sometimes I just want my local code running in live remote containers quickly, without building images and syncing to cloud docker repos or setting up git workflows or any of the other draining ways to get your code running remotely. With pooshit (and a simple config file), you can simply push your local dev files to a remote folder on a VM then automatically remove relevant running containers, then b

Topics: code containers docker like running

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Company that owns Gucci, Balenciaga, other brands confirms hack

techcrunch.com Lorenzo Franceschi-Bicchierai 2025-09-29 19:03:09

In Brief Kering confirmed a data breach affecting customers of its luxury brands Gucci, Balenciaga, Alexander McQueen, Yves Saint Lauren, and others, on Monday. Hackers stole sensitive customer data such as names, email addresses, phone numbers, home addresses, and the total amount of money they spent in stores all over the world. The BBC first reported the breach. Kering said the hackers did not steal credit card numbers and that it has contacted the customers whose data is part of the breac

Topics: addresses breach customers data hackers

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Calif. construction worker unofficially broke a fabled world record

news.ycombinator.com Lester Black 2025-09-27 04:45:31

It was a muggy July day in Santa Cruz and life could not have been more mundane for Alessandro “Alo” Slebir. The 24-year-old was pounding wooden concrete forms into a missing section of sidewalk. Cars raced by on a suburban highway as a neighbor walked over, looked at Slebir and asked, “Should I move my car?” “Hey, no worries, you’re fine! You’re not in the way,” Slebir said, in his characteristically friendly demeanor before returning to his hammer. You wouldn’t know it from the work boots or

Topics: mavericks said slebir surf wave

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Fueled by AI Hype, Google Becomes Fourth Company to Pass $3 Trillion Market Cap

gizmodo.com Ece Yildirim 2025-09-29 23:25:38

On Monday, Google’s parent company, Alphabet, became the fourth company to reach a market value of $3 trillion, and every member of this exclusive club has something in common. All it took was a rather small 4% rise in shares for the tech giant to hit the coveted stock market benchmark. Rather unsurprisingly, the three previous winners of that title—Nvidia, Microsoft, and Apple—are all titans of the tech industry that have been riding the wave of investor interest in AI, as well. Alphabet stoc

Topics: ai company market stock trillion

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You can get Nvidia's CUDA on three popular enterprise Linux distros now - why it matters

zdnet.com Steven Vaughan-Nichols 2025-09-30 07:12:48

NurPhoto/NurPhoto via Getty Images Follow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways The CUDA toolkit is now packaged with Rocky Linux, SUSE Linux, and Ubuntu. This will make life easier for AI developers on these Linux distros. It will also speed up AI development and deployments on Nvidia hardware. AI developers use popular frameworks like TensorFlow, PyTorch, and JAX to work on their projects. All these frameworks, in turn, rely on Nvidia's CUDA AI toolkit and

Topics: ai cuda linux nvidia rocky

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The Animated Origins of ‘Trick ‘r Treat’ Will Hit Theaters This Spooky Season in a New 4K Remaster

gizmodo.com Justin Carter 2025-09-30 07:00:37

After finally hitting the big screen for everyone for the first time a few years ago, Trick r’ Treat will be back in theaters October 14 and 16. According to a press release from Fathom Entertainment, the horror flick will get a 4K restoration and a little bonus in the form of a 4K restoration for director Mike Dougherty’s Season’s Greetings short. The 1996 video is an origin for the final film and will be part of a look back by Dougherty through several Halloween-specific memories that led to

Topics: 4k film horror treat trick

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The madness of SaaS chargebacks

news.ycombinator.com Mike Kulakov 2025-09-30 11:30:46

Press enter or click to view image in full size The $10 Payment That Cost Me $43.95 — The Madness of SaaS Chargebacks Mike Kulakov 5 min read · Just now Just now -- Listen Share We run several SaaS products at Everhour, all billed through Stripe. Majority of the time everything works fine, but sometimes we get chargebacks. Even thought we do everything possible to prevent them. We don’t ask for a credit card until the moment of subscription. A few days before each renewal, we send an email no

Topics: chargebacks customer dispute just time

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Meta bypassed Apple privacy protections, claims former employee

news.ycombinator.com Ben Lovejoy 2025-09-30 14:59:54

A former Meta product manager has claimed that the social network circumvented Apple’s privacy protections, as well as cheating advertisers, and fired him when he repeatedly raised the issue internally. Meta is said to have found ways to identify Apple users even after they refused consent for app tracking, in order to avoid an estimated $10 billion loss of revenue … App Tracking Transparency hit Meta hard Meta relied heavily on selling personalized advertising, which required it to be able t

Topics: apple meta purkayastha tracking users

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Show HN: I reverse engineered macOS to allow custom Lock Screen wallpapers

news.ycombinator.com Unknown 2025-09-30 13:28:09

Yes. Backdrop supports using custom video files and Rive animations to create a scene. You can import your own content via the Creator feature, and even submit it to the Community Platform for others to use.

Topics: animations backdrop community content create

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Samsung’s latest Good Lock module could supercharge the Gallery app

androidauthority.com Unknown 2025-09-30 23:22:39

TL;DR Samsung has started testing a new Good Lock app dubbed Gallery Assistant beta. The app brings a number of photo and video editing options under one umbrella. These features include advanced watermarks, media compression, and saving images as a PDF. Samsung has a ton of apps under its Good Lock umbrella, giving users a variety of extra options beyond the One UI platform. These Good Lock apps cover categories like the camera, home screen, audio, and notifications. Now, it looks like Samsu

Topics: app assistant good lock samsung

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Free Spotify users can finally listen to any track immediately

engadget.com Unknown 2025-09-30 23:00:13

There must be something in the water at Spotify HQ. Less than a week after delivering long-promised lossless audio, the company has another treat. Free listeners can finally listen to any track they want. After enhancing Premium, perhaps Spotify figured it could add a free perk without shedding subscribers. Spotify accounts on the free plan can now choose any track and immediately listen to it. Previously, that was paywalled for Premium subscribers. Non-paying ones had to shuffle through an alb

Topics: choose free playlist spotify track

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Battling for the lead at an IRL version of Mario Kart

theverge.com Tim Stevens 2025-09-30 23:01:24

When it comes to mainstream gaming appeal, it’s hard to beat Mario Kart. Break out some controllers at a party and you’ll likely get a grid full of eager racers. The game’s seamless way of balancing disparate levels of skill and aggression creates an addictive experience for just about everyone. Real-world karting, on the other hand, remains more of a niche affair. Sure, plenty of people race karts at theme parks and putt-putt parking lots, but this style of racing isn’t on the radar for your a

Topics: kart mario power rpm track

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The Apple Watch Series 11 is one feature away from making me ditch my Oura Ring

zdnet.com Nina Raemont 2025-10-01 03:03:10

Nina Raemont/ZDNET Follow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways Apple unveiled Sleep Scores on the Apple Watch. The feature is available with WatchOS 26 and on the new smartwatches. There's one health tracking feature I wish Apple had announced. Last year, Gallup surveyed Americans about their sleep habits. For the first time since polling began in 2001, it found that a majority of Americans said they'd feel better if they got more sleep. They aren't happy

Topics: apple feature heart sleep tracking

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Your Pixel Watch could soon offer unprecedented control over your Pixel phone

androidauthority.com Unknown 2025-10-01 09:02:25

Rita El Khoury / Android Authority TL;DR Google is testing new functionality as part of the Pixel Watch Unlock feature, which allows you to unlock your Pixel phone using the Watch. The upgrade could enable you to not only unlock your Pixel phone using a Pixel Watch but also launch a specific section of the app. The feature is intended to work with a set of specific “Authorized” apps that you will be able to manage from the phone’s Settings. The Watch Unlock feature offers a convenient approa

Topics: apps google pixel unlock watch

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The $10 Payment That Cost Me $43.95 – The Madness of SaaS Chargebacks

news.ycombinator.com Mike Kulakov 2025-10-01 12:30:46

Press enter or click to view image in full size The $10 Payment That Cost Me $43.95 — The Madness of SaaS Chargebacks Mike Kulakov 5 min read · Just now Just now -- Listen Share We run several SaaS products at Everhour, all billed through Stripe. Majority of the time everything works fine, but sometimes we get chargebacks. Even thought we do everything possible to prevent them. We don’t ask for a credit card until the moment of subscription. A few days before each renewal, we send an email no

Topics: chargebacks customer dispute just time

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Which NPM package has the largest version number?

news.ycombinator.com Unknown 2025-10-01 09:03:18

Which npm package has the largest version number? I spent way too much time on this I was recently working on a project that uses the AWS SDK for JavaScript. When updating the dependencies in said project, I noticed that the version of that dependency was v3.888.0 . Eight hundred eighty eight. That’s a big number as far as versions go. That got me thinking: I wonder what package in the npm registry has the largest number in its version. It could be a major, minor, or patch version, and it doe

Topics: const number package packages versions

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'How to Train Your Dragon' Remake: Release Date and Time on Peacock

cnet.com See Full Bio 2025-10-01 03:37:26

Need a live-action Night Fury in your life? The recent How to Train Your Dragon remake is hitting Peacock, so animated film fans can spend more time with the franchise's Vikings and dragons. The new version from Universal Pictures stars Mason Thames as the misfit Viking teen Hiccup, and Gerard Butler as Hiccup's dragon-loathing dad, Stoick the Vast (Butler also voices the character in the animated movie). Nico Parker plays Astrid, the tough girl Hiccup has a crush on, and Nick Frost plays the v

Topics: action dragon peacock premium train

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Accelerated Game of Life with CUDA / Triton

news.ycombinator.com Unknown 2025-09-28 07:46:02

Let’s look at implementing Conway’s Game of Life using a graphics card. I want to experiment with different libraries and techniques, to see how to get the best performance. I’m going to start simple, and get increasingly complex as we dive in. The Game Of Life is a simple cellular automata, so should be really amenable to GPU acceleration. The rules are simple: Each cell in the 2d grid is either alive or dead. At each step, count the alive neighbours of the cell (including diagonals). If the c

Topics: block_size_row int8_t rowstride tl x_ptr

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Latest Tech News

Writing an operating system kernel from scratch – RISC-V/OpenSBI/Zig

Here’s How to Deflect a Dangerous Asteroid Without It Totally Backfiring

Self-propagating supply chain attack hits 187 npm packages

BlackBerry Passport getting set to follow Classic with a new life on Android

Self-Replicating Worm Hits 180+ Software Packages

DuckDB 1.4.0 LTS

Trucker built a scale model of NYC over 21 years

One Vigilante, 22 Cell Tower Fires, and a World of Conspiracies

Self Propagating NPM Malware Compromises over 40 Packages

One Vigilante, 22 Cell Towers, and a World of Conspiracies

Experimental browser MMO with bots, boss fights and power-ups

Show HN: Pooshit – Sync local code to remote Docker containers

Show HN: Pooshit – sync local code to remote Docker containers

Company that owns Gucci, Balenciaga, other brands confirms hack

Calif. construction worker unofficially broke a fabled world record

Fueled by AI Hype, Google Becomes Fourth Company to Pass $3 Trillion Market Cap

You can get Nvidia's CUDA on three popular enterprise Linux distros now - why it matters

The Animated Origins of ‘Trick ‘r Treat’ Will Hit Theaters This Spooky Season in a New 4K Remaster

The madness of SaaS chargebacks

Meta bypassed Apple privacy protections, claims former employee

Show HN: I reverse engineered macOS to allow custom Lock Screen wallpapers

Samsung’s latest Good Lock module could supercharge the Gallery app

Free Spotify users can finally listen to any track immediately

Battling for the lead at an IRL version of Mario Kart

The Apple Watch Series 11 is one feature away from making me ditch my Oura Ring

Your Pixel Watch could soon offer unprecedented control over your Pixel phone

The $10 Payment That Cost Me $43.95 – The Madness of SaaS Chargebacks

Which NPM package has the largest version number?

'How to Train Your Dragon' Remake: Release Date and Time on Peacock

Accelerated Game of Life with CUDA / Triton

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