Hacker News: dezgeg

New comment by dezgeg in "Iterating Backwards in C"

dezgeg — Fri, 30 Oct 2026 11:04:12 +0000

Isn't decrementing pos beyond start of haystack technically undefined behaviour?

Correcting a 2400 dpi A3 Scanner in Software

dezgeg — Wed, 21 Oct 2026 10:26:18 +0000

Article URL: https://www.pagetable.com/302

Comments URL: https://news.ycombinator.com/item?id=50178581

Points: 2

# Comments: 0

New comment by dezgeg in "Who Is Planting Backdoors in Ledger Crypto Wallets?"

dezgeg — Wed, 14 Oct 2026 12:46:43 +0000

Well it doesn't need to be a generic purpose OCR, just one that works for this single UI layout and font.

New comment by dezgeg in "500B tokens later: Letting AI agents decompile a first-person shooter"

dezgeg — Sun, 11 Oct 2026 12:07:14 +0000

How do you know the original code didn't use some undefined variable on stack, but happened to consistently work because something else spilled a register containing "suitable" value?

New comment by dezgeg in "WSL3 Performance is about 5-60% faster than WSL2 depending on the workload"

dezgeg — Sat, 10 Oct 2026 20:33:15 +0000

I've generally found it better to do it other way around - keep all the stuff in Linux partition and from Windows side access that over the virtual network share \\wsl.localhost\\home\me\whatever

New comment by dezgeg in "WSL3 Performance is about 5-60% faster than WSL2 depending on the workload"

dezgeg — Sat, 10 Oct 2026 20:29:49 +0000

On top of the performance issue you mentioned, /mnt/c will be case-insensitive and trip up lots of Linux software!

New comment by dezgeg in "If somebody tries to hot-patch an already-hot-patched function"

dezgeg — Thu, 08 Oct 2026 07:59:24 +0000

Doesn't the Microsoft implementation work by having nop instruction as the first instruction of the function, which can then be patched to a jump to the patched code, that finally jumps back to the original function past the NOP?

Naive implementation of this scheme doesn't allow stacking.

New comment by dezgeg in "What Meta got right with Muse"

dezgeg — Sat, 03 Oct 2026 23:32:03 +0000

> YouTube, Google, Google Maps, and Chrome

You listed products that have been around for ~20 years. Keeping up already entrenched products running doesn't correlate with being able to launch new products.

New comment by dezgeg in "NTSB Preliminary Report: Prime Air 767 Runway Overrun [pdf]"

dezgeg — Sat, 03 Oct 2026 09:46:29 +0000

I'm gonna guess that the crew have been regularly landing while ignoring similar automated warnings in the past

New comment by dezgeg in "The systems that no one will test"

dezgeg — Tue, 29 Sep 2026 15:11:17 +0000

Not to mention how any sort of TLS key exchange is supposed to happen with an unidirectional network.

New comment by dezgeg in "On caring for user data: NeoVim caused Vim undo files to be deleted"

dezgeg — Sun, 27 Sep 2026 16:41:36 +0000

If your session / computer crashes, for one.

New comment by dezgeg in "From Thin Air to Bootable Images: The Tine Build System"

dezgeg — Sat, 26 Sep 2026 13:53:32 +0000

Yes, most of this is all supported. There is a existing recipe for building an image that you just dd to and SD card and can boot in a Raspberry Pi (and other devices supported by mainline kernel + u-boot).

Kernel is a package just like another; so you just write your own recipe. Patching kernel recipe works just like patching any Nix recipe.

Not sure about the rockchip-proprietary boot parts; you may be on your own.

New comment by dezgeg in "Linux support is coming to Snapdragon X2 series"

dezgeg — Fri, 25 Sep 2026 07:44:54 +0000

In theory device trees are supposed to be a OS-neutral stable ABI. Being able to put a device tree into unchangeable mask ROM is an often mentioned design goal.

However, there is a fatal flaw in the process that makes this a pipe dream in reality. In Linux, these rules only apply to reviewed and merged drivers. And during review any new DT interface will almost certainly be bikeshedded in some way.

So unless your chip vendor has upstreamed ALL their drivers before a device is manufactured, the device's firmware-provided DT will very likely work only against a vendor kernel and requires updating.

New comment by dezgeg in "Linux support is coming to Snapdragon X2 series"

dezgeg — Thu, 24 Sep 2026 11:00:05 +0000

It probably will help you maintain a better local fork, but getting all things upstreamed is the bottleneck and won't help too much here.

New comment by dezgeg in "Resident Evil 4 (GameCube) – complete byte-identical decompilation to C/C++"

dezgeg — Mon, 21 Sep 2026 07:51:59 +0000

Correct, N64 and PS1 era projects can essentially always be strictly tackled one function at a time. There are very minor things (like string literal sharing) where some earlier function can affect later function, but the workarounds are comparatively simple.

On the other hand, I have heard even old MSVC is a nightmare. Various things are affected by hash table ordering (so the names of variables matter in some situations), stuff like order of #includes mattering, etc.

New comment by dezgeg in "Ogre Battle 64 Recompiled Project at 99.05%"

dezgeg — Mon, 21 Sep 2026 07:38:34 +0000

The term for that is byte-matching decompilation. This is not such project.

New comment by dezgeg in "Why MCP Was Always a Bad Idea?"

dezgeg — Sun, 20 Sep 2026 20:17:07 +0000

Don't most harnesses already do that for bash commands?

New comment by dezgeg in "Resident Evil 4 (GameCube) – complete byte-identical decompilation to C/C++"

dezgeg — Sun, 20 Sep 2026 20:12:21 +0000

There is more normal looking code in other files. It sounds like the original game had animation data (or similar) embedded in the C code.

New comment by dezgeg in "The scourge of x86 emulation"

dezgeg — Fri, 18 Sep 2026 08:58:04 +0000

Games use plenty of native code; so much in fact that when Intel tried to enter the Android tablet market with x86 they had to write an ARM emulator.

New comment by dezgeg in "Reverse engineering my e-scooter and rewriting the firmware in Rust"

dezgeg — Mon, 14 Sep 2026 11:14:19 +0000

4G/5G Telco equipment (ab)use HDMI connectors/cables in a similar way.