bentobox | Operating System Development | Page 3

solemn axle Feb 16, 2026, 4:22 PM

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btw

craggy nacelle Feb 16, 2026, 4:22 PM

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true tho i dont swap to disk lol

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i don't really know if its the kernel's fault or rust being rust

solemn axle Feb 16, 2026, 4:25 PM

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nobody serious has yet to write a decent kernel where a big selling point was "it's rust"

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redox is junk

craggy nacelle Feb 16, 2026, 4:25 PM

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solemn axle redox is junk

oh yeah i forgot about that

craggy nacelle Feb 17, 2026, 7:05 PM

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hmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

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i've been considering doing a rewrite, but rewriting this again sounds like a huge PITA

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so i don't know what to do

next forum Feb 17, 2026, 7:14 PM

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craggy nacelle i've been considering doing a rewrite, but rewriting this again sounds like a hu...

i made an awful mess of my branches so i've been filtering keyronex code back into a fresh one and doing some refactoring (and i got dragged into some new feature work too) and i've found that a helpful process

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so rather than a rewrite, a sort of grand refactoring

craggy nacelle Feb 17, 2026, 7:15 PM

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maybe

next forum Feb 17, 2026, 7:18 PM

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i find it a satisfying process but it is irritating to go from running xorg and sketching the service manager and networking stuff back to putting the basics together again (i have no choice because the branch i took up work in, i stupidly simplified a lot of things vital to portability)

craggy nacelle Feb 17, 2026, 7:31 PM

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yeah it is

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my idea with this rewrite was to not rush userspace again as it will lead to bad design in some stuff (although it was way worse in my older kernel), and i may experiment with stuff like irq priorities etc

next forum Feb 17, 2026, 7:37 PM

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in terms of refamiliarising yourself with what you wrote it's certainly great for that

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i benefit from that since some things are 2-3 years old and long since out of my mental working set

craggy nacelle Feb 17, 2026, 7:51 PM

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next forum i benefit from that since some things are 2-3 years old and long since out of my...

yeah for me its only a few months but i still manage to forget what some parts of my code do

craggy nacelle Feb 17, 2026, 8:08 PM

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i wanted to experiment with a new build system (meson), but since i've never used it i will stick to what i know (makefiles), at least for the time being

craggy nacelle Feb 18, 2026, 3:03 PM

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in the meantime i stopped being lazy and finished my pty work for once

craggy nacelle Feb 18, 2026, 8:49 PM

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so fvwm3 failing to start when running with smp seems to be a race condition with my polling

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since even running single core but with tcg causes the same issue

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ah yes

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and when i add a shit ton of logging the issue happens with no smp on kvm too...

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fuck

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and after doing a clean build im getting shit tons of random crashes

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great

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oh wait this is tcg

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wait a minute...

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fuck i think i have some horrible race conditions

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specifically when i run with smp and tcg

craggy nacelle Feb 19, 2026, 6:55 PM

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this is like the 39485798345023478508234th polling issue i've had

craggy nacelle Feb 19, 2026, 7:14 PM

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oh wow it seems like closing windows in dwm works now

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i think one of my fixes for something else also made this work

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the only issue now is that if i close a terminal, i can't open any more

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oh

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that's not good

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oh no wtf

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what did i do

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oh shit

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i know what's happening

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my vfs will refuse to remove a node if it doesn't have a remove op

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i could either call vfs_remove_node instead of vfs_remove that doesn't have that check, or add an op

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i'll just call vfs_remove_node instead

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oh and my unix pipes have the same issue

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dwm should be fully usable now

crimson flame Feb 19, 2026, 8:47 PM

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solemn axle nobody serious has yet to write a decent kernel where a big selling point was "i...

What about maestro (ik this message is old asfk)

sullen crag Feb 19, 2026, 9:57 PM

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craggy nacelle dwm should be fully usable now

holy shit great work

craggy nacelle Feb 20, 2026, 1:38 PM

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dammit seems like i forgot to push the cmatrix diff on my other machine

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eyy not bad

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3.7mil ops

crimson flame Feb 20, 2026, 8:33 PM

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craggy nacelle 3.7mil ops

good work bro

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bentobox is peak

craggy nacelle Feb 20, 2026, 8:57 PM

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ty

floral wigeon Feb 21, 2026, 12:30 AM

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bent obos my beloved

craggy nacelle Feb 21, 2026, 12:41 AM

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yes

craggy nacelle Feb 21, 2026, 1:01 PM

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working on -smp 2!

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it takes a while to start but it runs

craggy nacelle Feb 21, 2026, 1:28 PM

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so i think that was the last major xorg issue i had

frail fog Feb 21, 2026, 1:36 PM

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craggy nacelle so i think that was the last major xorg issue i had

never say last issue and xorg together

craggy nacelle Feb 21, 2026, 1:40 PM

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lol

craggy nacelle Feb 21, 2026, 3:30 PM

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real hw

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holy shit fvwm loaded on real hw, although it took a while

rn_image_picker_lib_temp_2ea688d1-06d1-4de2-a27a-6086f065e8c6.jpg

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dude the nes emulator on my laptop is as smooth as on LINUX on my main

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its smoother than even in qemu

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how tf

next forum Feb 21, 2026, 6:03 PM

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craggy nacelle holy shit fvwm loaded on real hw, although it took a while

very cool

craggy nacelle Feb 22, 2026, 12:30 AM

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after this I went on a side quest and rewrote my website, looks much better now

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tomorrow I'll continue to work on this though, a few things I want to do:

proper error handling for some of my vfs functions
AHCI interrupts (will probably do legacy ones for now but I may look into MSI later)
make uACPI work on my laptop (I have a half-stubbed function that doesn't work on my laptop)

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some other things I may want to do:

write a page cache
port a better nes emulator

craggy nacelle Feb 22, 2026, 12:36 AM

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craggy nacelle so i think that was the last major xorg issue i had

(the issue being my polling race conditions, I finally used my brain for once and fixed it properly)

craggy nacelle Feb 22, 2026, 11:37 AM

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i think writing a vfs block cache would significantly reduce the time fvwm takes to load

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because it loads really fast with a ramdisk

floral wigeon Feb 22, 2026, 2:30 PM

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craggy nacelle i think writing a vfs block cache would significantly reduce the time fvwm takes...

implement page cache

craggy nacelle Feb 23, 2026, 7:19 PM

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bump

craggy nacelle Feb 23, 2026, 7:19 PM

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floral wigeon implement page cache

soon™

sullen crag Feb 24, 2026, 5:57 AM

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craggy nacelle i think writing a vfs block cache would significantly reduce the time fvwm takes...

Implement page cache

frail fog Feb 24, 2026, 8:12 AM

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craggy nacelle i think writing a vfs block cache would significantly reduce the time fvwm takes...

implement page cache

craggy nacelle Feb 24, 2026, 12:57 PM

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soon™

craggy nacelle Feb 24, 2026, 9:01 PM

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oops i left the vm running for 27 minutes in the background with -smp 12 and nyancat running in fvwm3 but it didn't crash at all, although there seems to be a small memory leak somewhere

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also yeah no page cache today

craggy nacelle Feb 24, 2026, 9:32 PM

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aaand it crashed after 45 minutes when i closed a second st window

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definitively a cleaner race condition that could've happened at any time, i need to fix that too

sullen crag Feb 25, 2026, 12:55 PM

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implement page cache

primal quest Feb 25, 2026, 1:41 PM

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sullen crag implement page cache

good commit message

sullen crag Feb 25, 2026, 1:51 PM

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primal quest good commit message

Trust the process

craggy nacelle Feb 25, 2026, 7:06 PM

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soon™

craggy nacelle Feb 25, 2026, 9:15 PM

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i should stop procastinating this

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today i made a struct that holds all memory usage info and a function in the pmm to get it including heap usage

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and i also fixed a few memory leaks in my syscalls

craggy nacelle Feb 25, 2026, 9:17 PM

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craggy nacelle so i think that was the last major xorg issue i had

but with this fix -smp 12 is finally stable in xorg

craggy nacelle Feb 26, 2026, 9:24 PM

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bump

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i implemented a line discipline for my pty layer today

sullen crag Feb 28, 2026, 8:03 AM

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Yo bro, i would recommend you to implement implement page cache

dapper patio Feb 28, 2026, 8:25 AM

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Good Morning , im happy to share this moment with my community

whole falcon Feb 28, 2026, 8:33 AM

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dapper patio Good Morning , im happy to share this moment with my community

this is the progress thread for bentobox, I suggest you start one for your project if you want to share your progress rather than use someone else's.

dapper patio Feb 28, 2026, 8:52 AM

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hey sorry , good luck for bentobox , this first time for me so don't know about this , any way , peace

craggy nacelle Feb 28, 2026, 10:26 AM

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time to work on this again

craggy nacelle Feb 28, 2026, 11:46 AM

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so even tho 3 of yall told me to implement a page cache, i'm going to ignore all of you and work on smth else trl

craggy nacelle Feb 28, 2026, 12:44 PM

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fixed a race condition in sched_sleep that made fvwm3 take way longer to start up than normal

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i thought i fixed all of my wakeup race conditions, but i forgot to fix it in sched_sleep

sullen crag Mar 1, 2026, 9:54 AM

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craggy nacelle so even tho 3 of yall told me to implement a page cache, i'm going to ignore all...

I have a banger idea tho

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Implement page cache

craggy nacelle Mar 1, 2026, 9:19 PM

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today i started implementing pci virtio drivers

craggy nacelle Mar 1, 2026, 10:41 PM

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I ended up getting sidetracked and built Minecraft CU0 in a Windows 10 VM

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windowsgun

craggy nacelle Mar 2, 2026, 10:17 AM

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me when Minecraft.Client.exe cannot find d3d11_x.dll when ran outside vs

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craggy nacelle Mar 2, 2026, 6:12 PM

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i only support xAPIC ;-;

obtuse glen Mar 2, 2026, 6:25 PM

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x2apic is easy

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especially if you already have xapic

dusk coyote Mar 2, 2026, 7:10 PM

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Yeah isnt it literally just reading a msr instead of a physical address

drifting spruce Mar 2, 2026, 7:23 PM

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pretty much, yes

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icr registers are gone in favor of a single msr

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and apic ids are 32-bit wide instead of 8 bit wide

dusk coyote Mar 2, 2026, 7:24 PM

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drifting spruce and apic ids are 32-bit wide instead of 8 bit wide

Shouldve made it 64 bit wide in anticipation of microtubule quantum vibration computing

drifting spruce Mar 2, 2026, 7:24 PM

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real

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unfortunately we can only address 4 million cpus

dusk coyote Mar 2, 2026, 7:25 PM

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But I made a board woth 4.0001 million cpus :(

craggy nacelle Mar 2, 2026, 7:38 PM

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dusk coyote Yeah isnt it literally just reading a msr instead of a physical address

oh lmao

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i never read into it so

primal quest Mar 2, 2026, 8:30 PM

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craggy nacelle

is XAPIC the regular APIC mode or is it in between regular APIC and X2APIC?

drifting spruce Mar 2, 2026, 8:33 PM

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pretty sure xAPIC is different from APIC

obtuse glen Mar 2, 2026, 8:52 PM

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its all the same function for me: https://github.com/brainboxdotcc/retro-rocket/blob/master/src/apic.c

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i could abstract further, but havent had the need

craggy nacelle Mar 2, 2026, 8:58 PM

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since i forgot to push my virtio changes to work on them here, i think i'll work on x2APIC support

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or maybe i can just watch youtube :P

whole falcon Mar 3, 2026, 12:03 PM

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primal quest is XAPIC the regular APIC mode or is it in between regular APIC and X2APIC?

xAPIC is original mode of the local apic (the mmio based one)

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primal quest Mar 3, 2026, 12:10 PM

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whole falcon xAPIC is original mode of the local apic (the mmio based one)

so why are they moving to something inferior in terms of access kind

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like

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why did they switch to MSRs with the x2APIC

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thats genuinely inferior imo

whole falcon Mar 3, 2026, 12:10 PM

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it has a lot of advantages

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like not needing to map them

primal quest Mar 3, 2026, 12:11 PM

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i understand the decision to increase the maximum CPU count

whole falcon Mar 3, 2026, 12:11 PM

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and ICR being a single register is nice

primal quest Mar 3, 2026, 12:11 PM

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wait, what's ICR?

daring tendon Mar 3, 2026, 12:11 PM

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two 32 bit registers you use to send ipis

primal quest Mar 3, 2026, 12:11 PM

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ah

whole falcon Mar 3, 2026, 12:11 PM

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interrupt command register, used for sending IPIs

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wow I was quite late

primal quest Mar 3, 2026, 12:12 PM

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ICR being a single 64-bit register I guess

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instead of ICR0 and ICR1 being two 32-bit parts for different purposes

craggy nacelle Mar 3, 2026, 7:05 PM

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i have pushed my virtio code to another branch as i will be taking a short break from that and work on the x2apic (shouldn't take long)

craggy nacelle Mar 4, 2026, 8:06 PM

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i should work on this again

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i haven't worked on this basically at all this week

craggy nacelle Mar 5, 2026, 7:07 PM

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i forgot to enable interrupts on other cores 😭

craggy nacelle Mar 5, 2026, 7:27 PM

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and now fvwm will deadlock in a spinlock in my scheduler on all cores when its starting up

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something's really weird

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but i cba debugging it now, i just ret in gdb and un-deadlock it trl

craggy nacelle Mar 5, 2026, 10:51 PM

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i mean, technically i don't really need to hold the tcb's lock in sched_exit

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as that mostly exists to avoid race conditions for missed wakeups, but this probably won't miss it

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oh waaaait i see the issue

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i acquire the lock twice in an irq

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ok so ig i'll just release it before calling sched_exit_group in signal_handle, as i don't want to make it take an extra argument to not take the lock

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or maybe i could add a check if i'm in an irq but that's more complicated

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yeah i'll just release the lock i think it'll be fine

craggy nacelle Mar 5, 2026, 11:03 PM

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frail fog never say last issue and xorg together

it wasn't the last issue kekw

craggy nacelle Mar 6, 2026, 1:29 AM

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so i've started playing aokana and it's 2:30am and i'm still playing it sooooo

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very productivity

craggy nacelle Mar 6, 2026, 11:49 AM

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wtf is wrong with my timer

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https://cdn.discordapp.com/attachments/1350438975386423296/1479445907325063249/2026-03-06_12-49-11.mkv?ex=69ac10df&is=69aabf5f&hm=ec5662614e2a28aa908845bb7e163ee46feab306abbb00b01c52dc251ead8b36&

▶ Play video

craggy nacelle Mar 6, 2026, 12:32 PM

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ah silly bug in sched_sleep

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fixed

craggy nacelle Mar 6, 2026, 2:10 PM

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so i think some libraries i built in my sysroot that xorg requires made gcc break and it's trying to include my system's headers when i build it

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so that's annoying

craggy nacelle Mar 7, 2026, 4:02 PM

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bump

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i basically can't work on this today at all

craggy nacelle Mar 8, 2026, 10:04 PM

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made it so my mmu preallocates the higher 256 pml4 entries on x86-64

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i could've made my code sync the higher entries better but this is a lot simpler even if it has a slight memory overhead (1mb)

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hopefully should get rid of some of my random crashes

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on aarch64 i don't need this as it has two separate pagemap registers

craggy nacelle Mar 8, 2026, 10:48 PM

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maybe I could blame it all on bit flips...

craggy nacelle Mar 9, 2026, 3:23 PM

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god i really need to fix this fucking mess

ls ports/
bash.sh           doomgeneric.sh  font-util.sh  grep.sh        libpthread-stubs.sh  libXext.sh         libxkbfile.sh  lua.sh      st.diff          xeyes.sh                  xorgproto.sh
binutils.sh       dwm.sh          freetype.sh   isl.diff       libSM.sh             libXfixes.sh       libxml2.sh     mpfr.diff   st.sh            xf86-input-keyboard.diff  xorg-server.diff
cmatrix.diff      expat.sh        fvwm3.sh      less.sh        libX11.sh            libXfont2.sh       libXmu.sh      ncurses.sh  ttf-ibm-plex.sh  xf86-input-keyboard.sh    xorg-server.sh
cmatrix.sh        fastfetch.diff  gcc.sh        libevent.sh    libXau.sh            libXft.sh          libXpm.sh      nes_emu.sh  twm.sh           xf86-input-mouse.diff     Xorg.sh
config.sub        fastfetch.sh    gettext.diff  libfontenc.sh  libXaw.sh            libXi.sh           libXrandr.sh   nettle.sh   vim.sh           xf86-input-mouse.sh       xorg-util-macros.sh
coreutils.diff    figlet.diff     gmp.diff      libICE.sh      libxcb.sh            libxkbcommon.diff  libXrender.sh  nyancat.sh  xcb-proto.sh     xf86-video-fbdev.diff     xtrans.sh
coreutils.sh      figlet.sh       gnulib.diff   libiconv.sh    libxcvt.sh           libxkbcommon.sh    libXt.sh       pixman.sh   xclock.sh        xf86-video-fbdev.sh       zlib.sh
doomgeneric.diff  fontconfig.sh   gnulib.sh     libpng.sh      libXdmcp.sh          libxkbcomp.sh      lua.diff       src         xev.sh           xkeyboard-config.sh

frail fog Mar 9, 2026, 3:24 PM

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craggy nacelle god i really need to fix this fucking mess ``` ls ports/ bash.sh doomg...

ICE

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https://tenor.com/view/edit-usa-donald-trump-trump-2024-gif-3951380921143495666

Tenor

craggy nacelle Mar 9, 2026, 3:28 PM

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lol

dusk coyote Mar 9, 2026, 3:44 PM

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craggy nacelle god i really need to fix this fucking mess ``` ls ports/ bash.sh doomg...

Jinx:

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https://tenor.com/view/mercy-overwatch-come-here-gif-14280244

Tenor

craggy nacelle Mar 9, 2026, 4:08 PM

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dusk coyote Jinx:

true

sullen crag Mar 9, 2026, 4:26 PM

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craggy nacelle god i really need to fix this fucking mess ``` ls ports/ bash.sh doomg...

I recommend making a seperate repository and putting each script into a folder that is categorized

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for example any xorg tool in x11/

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Then just make it link to the category

craggy nacelle Mar 9, 2026, 4:28 PM

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sullen crag for example any xorg tool in x11/

i guess but the mess rn is the over 1000loc of duplicate code in those shell scripts

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i also kinda wanna keep this as a monorepo but we'll see

sullen crag Mar 9, 2026, 4:33 PM

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Oh damn

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Well

dusk coyote Mar 9, 2026, 5:39 PM

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Get a clanker to rewrite that stuff as jinx recipes for you

craggy nacelle Mar 9, 2026, 7:03 PM

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github.com/AlDanial/cloc v 2.08  T=0.03 s (3061.0 files/s, 130828.9 lines/s)
-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
Bourne Shell                    68            398              3           1910
diff                            17             71            399            852
-------------------------------------------------------------------------------
SUM:                            85            469            402           2762
-------------------------------------------------------------------------------

🥀 almost 2000loc of shell script slop

craggy nacelle Mar 9, 2026, 9:38 PM

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i need to stop slacking off so much

craggy nacelle Mar 14, 2026, 3:50 PM

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finally got back to this

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haven't worked on this for almost a week

craggy nacelle Mar 16, 2026, 4:54 PM

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my friends at school like to refer to me as the procastinator pro max

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i think they're right

obtuse glen Mar 16, 2026, 5:26 PM

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or, youre not sure if theyre right but youll get around to asking them next week?

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kekeke

full leaf Mar 17, 2026, 1:20 AM

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@craggy nacelle what are you working on rn?

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im pretty curious

craggy nacelle Mar 17, 2026, 6:14 AM

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virtio drivers

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tho I forgot to push my changes on my other machine so I can't work on it for a day

craggy nacelle Mar 17, 2026, 5:52 PM

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obtuse glen or, youre not sure if theyre right but youll get around to asking them next week...

One of my friends today confirmed it KEKW

full leaf Mar 18, 2026, 12:21 AM

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ohh

craggy nacelle Mar 19, 2026, 1:29 PM

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bump

whole falcon Mar 20, 2026, 7:17 AM

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craggy nacelle bump

dont do that.

craggy nacelle Mar 20, 2026, 8:57 AM

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whole falcon dont do that.

I was gonna work on this and say something but I ended up not

craggy nacelle Mar 23, 2026, 12:34 PM

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maybe it's refactor time

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i want to do a better build system

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yk, use jink and alldat

full leaf Mar 23, 2026, 12:49 PM

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whats a jink

craggy nacelle Mar 23, 2026, 12:53 PM

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jinx*

craggy nacelle Mar 23, 2026, 12:53 PM

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full leaf whats a jink

https://codeberg.org/mintsuki/jinx

Codeberg.org

jinx

Meta-build-system for bootstrapping operating system distributions.

craggy nacelle Mar 26, 2026, 2:51 PM

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i swear i will work on this again soon™

craggy nacelle Mar 27, 2026, 4:17 PM

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today may be the day

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boy where do i start

hexed violet Mar 27, 2026, 4:38 PM

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port qemu

daring tendon Mar 27, 2026, 4:38 PM

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port kde

craggy nacelle Mar 27, 2026, 4:48 PM

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💀

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i may start by making a gcc 15 toolchain instead of 16 because surprise surprise it's half fucking broken

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actually i don't have the time for that

craggy nacelle Mar 27, 2026, 5:51 PM

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just pushed my first changes, doesn't build yet but it's close to

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i gotta go for a bit and i'll be on my other machine when i come back so that's why i pushed

craggy nacelle Mar 27, 2026, 5:51 PM

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craggy nacelle just pushed my first changes, doesn't build yet but it's close to

also as last time i'll keep what's good, except this time i have more stuff that's good lol

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i'll keep the scheduler but unlike last time i'll rewrite the vfs

craggy nacelle Mar 28, 2026, 11:08 AM

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or maybe i could just do a good refactor

craggy nacelle Mar 28, 2026, 5:09 PM

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yeah i'll do a good refactor instead lol my code actually isn't that shit

craggy nacelle Mar 28, 2026, 10:14 PM

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things i want to do soon:

redo my toolchain using gcc 15.2.1 instead of 16 from trunk
~~rewrite~~ make a clanker rewrite my ports scripts to jinx

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then maybe i can make my VFS properly etc etc

daring tendon Mar 28, 2026, 10:15 PM

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does clanker actually know how to do jinx stuff

drifting spruce Mar 28, 2026, 10:17 PM

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it can probably figure it out

craggy nacelle Mar 28, 2026, 10:45 PM

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daring tendon does clanker actually know how to do jinx stuff

i can give it the codeberg link and it'll figure it out

craggy nacelle Mar 28, 2026, 10:45 PM

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craggy nacelle things i want to do soon: - redo my toolchain using gcc 15.2.1 instead of 16 fro...

or write a driver for Wacom Serial Pen HID Tablet

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xorg in this on my tablet pc would be hilarious

drifting spruce Mar 28, 2026, 10:48 PM

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well.. for that you need usb

craggy nacelle Mar 28, 2026, 10:48 PM

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is it

drifting spruce Mar 28, 2026, 10:48 PM

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seems like you have neither an [xeuo]hci driver nor a usb stack

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well, yeah lol

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how do you plug it in

craggy nacelle Mar 28, 2026, 10:49 PM

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it looks like it's using serial

daring tendon Mar 28, 2026, 10:49 PM

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wait what

drifting spruce Mar 28, 2026, 10:49 PM

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oh sorry iread "wacom pen hid tablet"

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i glossed over serial

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but what the hell?

craggy nacelle Mar 28, 2026, 10:49 PM

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according to windows its on Intel 82801GBM (ICH7-M) LPC Interface

daring tendon Mar 28, 2026, 10:49 PM

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loool wait

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its a hid over i2c

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thats even harder

drifting spruce Mar 28, 2026, 10:49 PM

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lmfao what the hell

craggy nacelle Mar 28, 2026, 10:49 PM

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oh fuck

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LOL

daring tendon Mar 28, 2026, 10:49 PM

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its a proprietary driver probably

craggy nacelle Mar 28, 2026, 10:50 PM

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but it says its irq 4

drifting spruce Mar 28, 2026, 10:50 PM

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kitty

daring tendon Mar 28, 2026, 10:50 PM

#

yes

#

the i2c device probably uses a legacy irq

craggy nacelle Mar 28, 2026, 10:50 PM

#

ah

daring tendon Mar 28, 2026, 10:51 PM

#

this one? https://elixir.bootlin.com/linux/v6.19.10/source/drivers/input/tablet/wacom_serial4.c

craggy nacelle Mar 28, 2026, 10:52 PM

#

#

i thought this was serial?

daring tendon Mar 28, 2026, 10:52 PM

#

how old is this pc

craggy nacelle Mar 28, 2026, 10:52 PM

#

2008

daring tendon Mar 28, 2026, 10:52 PM

#

ohh then maybe its not i2c but literal serial

craggy nacelle Mar 28, 2026, 10:52 PM

#

yeah that's what im thinking

drifting spruce Mar 28, 2026, 10:52 PM

#

cursed

craggy nacelle Mar 28, 2026, 10:53 PM

#

its a fujitsu st5112

daring tendon Mar 28, 2026, 10:53 PM

#

i wonder how it even detects it

craggy nacelle Mar 28, 2026, 10:53 PM

#

no idea

daring tendon Mar 28, 2026, 10:54 PM

#

crazy stuff

craggy nacelle Mar 28, 2026, 10:54 PM

#

i'll see what linux says about this

daring tendon Mar 28, 2026, 10:56 PM

#

does that pc even have acpi?

#

maybe its listed in aml somehow

craggy nacelle Mar 28, 2026, 10:56 PM

#

yes

daring tendon Mar 28, 2026, 11:01 PM

#

u can check in details

craggy nacelle Mar 28, 2026, 11:01 PM

#

yeah i saw acpi stuff there

#

oooh yeah this is it

craggy nacelle Mar 28, 2026, 11:31 PM

#

aight so as I expected, no ttyS0 as it's on 0x220

#

(this screenshot was mostly me wanting to showcase it running on new hardware lol)

daring tendon Mar 28, 2026, 11:42 PM

#

new KEKW

craggy nacelle Mar 29, 2026, 1:05 AM

#

i just looked at my clock and saw 3am and i was so fucking confused

#

turns out its summer time now

craggy nacelle Mar 29, 2026, 11:49 AM

#

craggy nacelle aight so as I expected, no ttyS0 as it's on 0x220

wait wtf why am i getting a ttyS0 now

craggy nacelle Mar 29, 2026, 12:06 PM

#

fuck i know why 💀

craggy nacelle Mar 29, 2026, 1:17 PM

#

also the sad thing about this machine is that the ps2 emulation is horrible, if i type faster than like 1 character/sec it will bug out and spam it

drifting spruce Mar 29, 2026, 1:20 PM

#

just implement xhci + usb hid

#

sunglas

frail fog Mar 29, 2026, 1:20 PM

#

yes do xhci

craggy nacelle Mar 29, 2026, 1:27 PM

#

soon™

frail fog Mar 29, 2026, 1:29 PM

#

craggy nacelle soon™

now

craggy nacelle Mar 29, 2026, 1:29 PM

#

no

#

i'm fixing this driver

frail fog Mar 29, 2026, 1:30 PM

#

https://cdn.discordapp.com/attachments/734354115567812659/1471217554868408416/IMG_0921.gif

craggy nacelle Apr 1, 2026, 11:17 PM

#

hello everyone, this might be a bit sudden, but due to the complexity of maintaining a legacy codebase in C I'm announcing that I'll be rewriting this to Fortran to allow for a cleaner codebase and less scheduler crashes

#

I will be also targeting SPARC64 and loongarch64 instead of x86-64 and aarch64 as it allows the scheduler to be more efficient.

#

Intel however, is looking into hardware accelerating date acceleration with 512-bit timestamps powered by AVX-512. If this technology succeeds, I absolutely see everyone moving to this format.
I will be also moving to the AVX-512 accelerated timestamps for performance reasons.

#

and since SPARC doesn't have AVX-512 I will be implementing a compatibility layer in software to allow the optimisations to still work.

#

Hopefully everyone understands these changes in the philosophy bentobox is taking—I'm open to suggestions for improving this even further!

frail fog Apr 2, 2026, 3:57 AM

#

https://giphy.com/gifs/gabriel-ultrakill-he-made-a-statement-suiCUOj3g1slFuMtRv

Giphy

Bopcity

craggy nacelle Apr 2, 2026, 11:15 AM

#

wtf

coral ravine Apr 2, 2026, 3:52 PM

#

frail fog https://giphy.com/gifs/gabriel-ultrakill-he-made-a-statement-suiCUOj3g1slFuMtRv

full leaf Apr 3, 2026, 2:39 AM

#

craggy nacelle hello everyone, this might be a bit sudden, but due to the complexity of maintai...

um i think binary will be better

#

i feel like writing code in english is so stupid man

#

lets just use numbers to write them

craggy nacelle Apr 3, 2026, 10:40 AM

#

true

craggy nacelle Apr 15, 2026, 1:48 PM

#

dead os until i get motivation

craggy nacelle Apr 16, 2026, 5:30 PM

#

craggy nacelle aight so as I expected, no ttyS0 as it's on 0x220

so this thing will be on hold until i can get a better setup for trying out the driver, i almost had it there but i had to wait 3 MINUTES every time i tried a change as 1. my flash drive is slow (cheap usb 2.0 hp one), 2. the target pc is old and takes twice the time to read the image from the usb than my main to write it and 3. i have no initrd compression

#

so, here's a list of things i want to work on from what i can remember, mostly in order:

redo my toolchain
move my userspace scripts to jinx
???
initrd compression
ftruncate
finish the wacom driver
page cache (?)
virtio drivers
fix the arm port
logging backend (?)

#

my current toolchain is fine but it's always been giving me small issues as my dumbass though using the master branch of gcc to make my gcc was a good idea

clear warren Apr 16, 2026, 6:30 PM

#

craggy nacelle so this thing will be on hold until i can get a better setup for trying out the ...

why not just use PxE boot?

#

if you have it

craggy nacelle Apr 16, 2026, 6:31 PM

#

i'm lazy to set it up

clear warren Apr 16, 2026, 6:31 PM

#

ah

#

lol

craggy nacelle Apr 18, 2026, 4:40 PM

#

after fighting jinx for the past few hours, i've decided that instead of trying to use it i think i'll make my own tiny wrapper thingy

#

and clean up my ports folder a bit

#

what i was mostly annoyed by with my ports scripts is that 1. there was no dependency handling and 2. there is a SHIT ton of repetitive code

craggy nacelle Apr 18, 2026, 5:55 PM

#

actually nvm

craggy nacelle Apr 18, 2026, 9:51 PM

#

ok so i got jinx working and i'm fininshing setting up gcc and allat, but setting up jinx makes this even more generic (mlibc + unix like + limine os)

#

:(

craggy nacelle Apr 19, 2026, 8:45 PM

#

ok I almost got bash working today

#

from now on it should be pretty smooth sailing

craggy nacelle Apr 23, 2026, 11:52 AM

#

i got back to working on it, jinx works!

#

not sure why i'm getting the missing tcgetwinsize sysdeps now, it didn't use them before

craggy nacelle Apr 25, 2026, 4:09 PM

#

coreutils

#

i also fixed a use-after-free deadlock in the scheduler

mossy tiger Apr 25, 2026, 4:09 PM

#

Nice

left trellis Apr 25, 2026, 4:29 PM

#

craggy nacelle coreutils

Hi, are u using what for the writing? Like VGA?

craggy nacelle Apr 25, 2026, 4:41 PM

#

flanterm

left trellis Apr 25, 2026, 4:45 PM

#

craggy nacelle flanterm

Uhhhh

#

I have to search that

#

But thx

inland glen Apr 25, 2026, 4:46 PM

#

left trellis I have to search that

https://github.com/mintsuki/flanterm

GitHub

GitHub - Mintsuki/Flanterm: Fast and reasonably complete (framebuff...

Fast and reasonably complete (framebuffer) terminal emulator. - Mintsuki/Flanterm

#

It's very convenient

left trellis Apr 25, 2026, 4:47 PM

#

inland glen It's very convenient

I'll give a look, thx u so much

icy wyvern Apr 25, 2026, 5:44 PM

#

I love this rofl

craggy nacelle Apr 25, 2026, 8:02 PM

#

that's ancient lol

#

the current one is much better

craggy nacelle Apr 25, 2026, 9:33 PM

#

FUCK, this exact issue i had with the old bentobox when i compiled vim

#

seems like some linux-specific stuff is causing this to break on my os? but what could be fucking causing this 😭

icy wyvern Apr 26, 2026, 4:30 AM

#

craggy nacelle seems like some linux-specific stuff is causing this to break on my os? but what...

maybe so

#

like maybe some syscalls arent implemented

craggy nacelle Apr 26, 2026, 7:44 AM

#

probably not that

#

I had the same issue months ago when I was using musl

#

I guess I'll try disabling the Linux option in mlibc

craggy nacelle Apr 26, 2026, 2:10 PM

#

.

#

seems like it wasn't exactly the same issue but very similar

craggy nacelle May 1, 2026, 10:21 AM

#

fixed

#

and my old kernel probably had the same bug

#

my tty fifos were too small

craggy nacelle May 1, 2026, 12:11 PM

#

fastfetch

obtuse glen May 1, 2026, 3:24 PM

#

do you also have slowfetch?

craggy nacelle May 1, 2026, 3:50 PM

#

obtuse glen do you also have slowfetch?

alias slowfetch="neofetch"

#

neofetch won't run lmao

dusk coyote May 1, 2026, 4:36 PM

#

neofetch is considerably more difficult to run than fastfetch

#

simply because it is a huge shell script and so it stress tests your shit meme

obtuse glen May 1, 2026, 4:52 PM

#

craggy nacelle ```sh alias slowfetch="neofetch" ```

not slow enough lmaoo

craggy nacelle May 1, 2026, 4:58 PM

#

dusk coyote simply because it is a huge shell script and so it stress tests your shit <:meme...

i got it running in old bentobox but my rewritten kernel probably has some bug making it not work

#

probably a race condition somewhere

craggy nacelle May 2, 2026, 11:43 AM

#

hell yeah

#

i'll build input drivers after lunch

craggy nacelle May 2, 2026, 2:54 PM

#

input works

#

time for twm

craggy nacelle May 2, 2026, 8:45 PM

#

so uh

#

the keyboard doesn't do anything in xorg for some reason

#

xorg's not even trying to read from it for some reason

craggy nacelle May 4, 2026, 3:14 PM

#

bruh the refcount is zero

#

because i forgot to increment it on fork

#

lol i'll drop the refcount i don't even need it

#

lol it works now

craggy nacelle May 4, 2026, 5:36 PM

#

i'm thinking of writing a logging backend

#

that's not just a ringbuffer and nothing else

#

cause i found a bug where if i have a low enough loglevel, the first 4 logs will get shown anyway cause when i initialize the framebuffer i just dump the whole ringbuffer onto it

#

although this could probably be fixed by treating the first logs as all LOG_INFO cause i don't see how i would make it store the loglevels without having some kind of data structure and that would require making a list and i need to dynamically allocate that before i even set up the mmu...

#

maybe i could get rid of gdt init... ok but ehh

craggy nacelle May 4, 2026, 6:06 PM

#

anyway, the new evdev driver should make it so i don't have to suffer writing abs support for my old keyboard and mouse xorg drivers

#

so i think i could already hook up the wacom driver, the only issue is that i don't have that pc here rn

left trellis May 4, 2026, 7:40 PM

#

craggy nacelle cause i found a bug where if i have a low enough loglevel, the first 4 logs will...

How do u do this cool screenshots?

craggy nacelle May 4, 2026, 7:42 PM

#

kde lets you do that

craggy nacelle May 5, 2026, 1:49 PM

#

xclock and xeyes ported again

#

it may be time this thing gets a logo of some kind

#

i'm open for ideas

deft ocean May 5, 2026, 2:37 PM

#

you could do a bento box with different OS/hardware components inside like a terminal or something lol

#

ik u never saw that one coming

craggy nacelle May 5, 2026, 7:18 PM

#

do you see me fitting that in a fastfetch ascii art

craggy nacelle May 5, 2026, 8:38 PM

#

bruh my tmpfs has a truncation bug

#

nvm i just never implemented ftruncate lmao

obtuse glen May 5, 2026, 9:23 PM

#

craggy nacelle it may be time this thing gets a logo of some kind

A meat pie

craggy nacelle May 9, 2026, 8:06 PM

#

trying to run openbox, it starts and the mouse cursor changes to the arrow, but when i try to launch anything or open the menu it will do nothing

#

i can't even launch apps from the serial tty, openbox is half broken here

#

and running openbox --debug also doesn't help much:

📎 message.txt

#

it may be some race condition somewhere but i have no idea where to start looking

obtuse glen May 9, 2026, 8:25 PM

#

hmmm of course I can't capture it

#

those x11 backgrounds cause weird moire patterns in my screen in the image

craggy nacelle May 9, 2026, 8:26 PM

#

yeah it happens on some screens

obtuse glen May 9, 2026, 8:29 PM

#

why does x11 default to such an ugly pattern

craggy nacelle May 9, 2026, 8:29 PM

#

i'm doing X -retro

obtuse glen May 9, 2026, 8:48 PM

#

xorg or oldschool x11r6?

craggy nacelle May 9, 2026, 8:54 PM

#

xorg

craggy nacelle May 10, 2026, 12:22 PM

#

fontconfig not working has been fixed

#

i was returning -EINVAL instead of -EOPNOTSUPP

icy wyvern May 10, 2026, 12:23 PM

#

craggy nacelle i was returning -EINVAL instead of -EOPNOTSUPP

😭

craggy nacelle May 10, 2026, 12:24 PM

#

now st starts up quick again

#

but openbox still doesn't work

craggy nacelle May 11, 2026, 10:58 AM

#

o

#

if i make it not block in futex it works

frail fog May 11, 2026, 10:58 AM

#

meow

craggy nacelle May 11, 2026, 11:12 AM

#

yeah it works just fine without futexes

#

weird

#

idk if its a race condition or what but

#

it looks like it gets stuck waiting in futexes in glib

drifting spruce May 11, 2026, 11:27 AM

#

classic glib

craggy nacelle May 11, 2026, 6:10 PM

#

i forgot to mention that i now support zstd compressed modules

obtuse glen May 11, 2026, 6:49 PM

#

hmmm that is a good idea

#

how much of a saving do you get?

daring tendon May 11, 2026, 6:50 PM

#

Code is generally not very well compressable

obtuse glen May 11, 2026, 6:50 PM

#

I compress filesystem images

obtuse glen May 11, 2026, 6:51 PM

#

daring tendon Code is generally not very well compressable

...upx called

craggy nacelle May 11, 2026, 7:09 PM

#

daring tendon Code is generally not very well compressable

i meant initrds lol

#

from ~250mb down to ~66mb

obtuse glen May 11, 2026, 8:10 PM

#

not bad, I just use zlib and I compress my esp partition image from 68mb to 600k

#

it is mostly nuls

craggy nacelle May 16, 2026, 1:39 PM

#

built the new userspace on my other machine

#

i only ran into 2 small issues:

freedesktop.org's libevdev mirror has bot protection and it wasn't letting it download on my network, switching to the gitlab mirror fixed it
st didn't have ttf-ibm-plex as a dependency so it couldn't find the font

#

i also rewrote the build instructions in the readme

craggy nacelle May 20, 2026, 10:22 AM

#

now the logging system thingy can store loglevels

#

so you can now silence gdt logs at startup

#

i also implemented truncate & ftruncate

craggy nacelle May 20, 2026, 2:09 PM

#

ok i tried porting i3 and it gets stuck in futexes too 😭

craggy nacelle May 20, 2026, 2:49 PM

#

ain't no fucking way

#

ig my futex code was shit after all

#

this works flawlessly now 😭

craggy nacelle May 20, 2026, 7:30 PM

#

fixed a deadlock in the scheduler's balancing

#

i forgot to acquire the thread's lock 😔

#

there is something spectacle is doing to my screenshots that makes them blurry for some reason

#

i use 125% scale in kde cause it looks better but my screenshots specifically when i do it in the screenshot window mode look weird

#

compared to

#

and it's been happening for a while

craggy nacelle May 20, 2026, 7:53 PM

#

craggy nacelle fixed a deadlock in the scheduler's balancing

it's been running for almost an hour with scheduling balancing disabled lmao so yeah that was it

craggy nacelle May 21, 2026, 6:21 AM

#

my spanish teacher lied to all of us lmao

#

she said there was an exam today and i went to school for nothing because all the teachers are on strike here

craggy nacelle May 21, 2026, 8:12 AM

#

forgot to build doom here

#

lol

craggy nacelle May 21, 2026, 8:57 AM

#

anyway, I still need to look into futexes I believe as openbox sometimes still won't start

full leaf May 22, 2026, 3:07 PM

#

why r u still using xorg retro?

#

looks really weird

#

(the background)

mossy tiger May 22, 2026, 3:35 PM

#

That's just the screen recording that makes it look weird

#

It looks fine IRL

craggy nacelle May 22, 2026, 11:57 PM

#

i spent all of this afternoon replacing my isp provided router with my mikrotik as my sfp ont finally arrived

#

the issue was that the firmware on the ont was broken and wouldn't make a connection so i had to try 3 different images until it finally fucking worked and that was a solid 3-4h

#

after that the mikrotik setup was pretty easy

obtuse glen May 23, 2026, 6:26 PM

#

whenever I see mikrotik I always think of it as necrotic

#

a rotting dead router /j

#

kekeke

clear warren May 23, 2026, 6:26 PM

#

why

#

they very good

obtuse glen May 23, 2026, 6:27 PM

#

because the words rhyme

#

I use a protectli fw-1

craggy nacelle May 25, 2026, 12:37 AM

#

I've been working on making spinlock usage in my lists consistent as half of my code just didn't use the locks

#

Tho now the scheduler deadlocks running fastfetch (even on single core lol)

#

If I sleep before doing anything in the cleaner I can get around it but I'll have to keep investigating

#

And hopefully this makes my scheduler more stable and not randomly crash from time to time

craggy nacelle May 25, 2026, 5:38 PM

#

No work today as I'm at a concert in Valencia

craggy nacelle May 26, 2026, 9:34 PM

#

okay the hopefully safer code has been pushed

#

i think it's time to implement a page cache

#

my io isn't that slow but it'll help anyway

craggy nacelle May 26, 2026, 11:59 PM

#

craggy nacelle i think it's time to implement a page cache

so uh that's for tomorrow

#

cause i'm lazy

craggy nacelle May 27, 2026, 12:24 AM

#

fvwm3 again

dusk coyote May 27, 2026, 12:39 AM

#

craggy nacelle fvwm3 again

U need the mlibc scanf patch

#

For sidebar

#

Smh

craggy nacelle May 27, 2026, 12:39 AM

#

dusk coyote U need the mlibc scanf patch

soon™

craggy nacelle May 27, 2026, 1:05 AM

#

oops i forgot i broke scheduler balancing (i nuked the old code out of existance)

#

so this is running all under one core

#

and quite well actually

#

its using 75-80% of this one core on my 5600x

#

its only a tiny bit laggy

#

i'm quite impressed at how well this is performing

craggy nacelle May 27, 2026, 1:29 AM

#

I find it funny how I never renamed the old main branch

#

That branch is stuck on bentobox 0.2.2 lmfao

#

things I wanna make work:

fix pty use after frees
stability
page cache
merge math's mlibc patch into my fork
more games
fix the scheduler running everything on the bsp
revive arm cause it's just dead

#

I literally haven't updated the arm code since like january

craggy nacelle May 27, 2026, 3:34 PM

#

i should also make my mmu safer

craggy nacelle May 27, 2026, 6:38 PM

#

okay maybe my scheduler lock fixes paid off after all? it's been running for 3 hours straight without any crashes (i had class and it's still running)

#

although the instabilities usually are when launching processes so idk

#

i have noticed that disk performance absolutely tanks when there is a lot of load from xorg from running a dozen xeyes

#

but it still works just very slowly

#

craggy nacelle May 28, 2026, 4:45 PM

#

craggy nacelle okay the hopefully safer code has been pushed

ok so the issue is actually just a use after free of struct process?

craggy nacelle May 28, 2026, 11:31 PM

#

so i realized that for the past few months i've been shooting myself in the foot as i was stiing in malloc which is called in irq contexts, and especially schedule()...

#

so that's been fixed

#

i also fixed some other things here and there

#

oh yeah i fixed init not reaping shit properly lmao

solemn axle May 28, 2026, 11:35 PM

#

craggy nacelle so i realized that for the past few months i've been shooting myself in the foot...

how come schedule calls malloc

craggy nacelle May 28, 2026, 11:35 PM

#

since it does more than it should, it migrates threads to the zombie threads list for the cleaner to clean them and that move between lists allocates and frees memory

solemn axle May 28, 2026, 11:36 PM

#

why do lists allocate and free memory

craggy nacelle May 28, 2026, 11:36 PM

#

because they're dynamic? i need to allocate the nodes

#

i use generic lists for everything

solemn axle May 28, 2026, 11:36 PM

#

what happens on oom

craggy nacelle May 28, 2026, 11:36 PM

#

instead of keeping next and prev pointers in every structure i use

craggy nacelle May 28, 2026, 11:36 PM

#

solemn axle what happens on oom

panic

#

since i cba to handle it better

solemn axle May 28, 2026, 11:37 PM

#

are you worried about your scheduler's performance

craggy nacelle May 28, 2026, 11:38 PM

#

in the form that i'd like it to be better but most of the time i just make it work and don't give it more thought

#

it could be much better if i wasn't lazy, the optimizations are coming soon™

solemn axle May 28, 2026, 11:39 PM

#

idk if you care at all but in "real kernel" schedulers they make it a point to never call the heap because it causes layer ordering problems with the memory manager that lead to deadlocks later on and whatnot

#

its also a performance issue

#

so they use intrusive list links in the thread structure and whatever

craggy nacelle May 28, 2026, 11:39 PM

#

ah makes sense

solemn axle May 28, 2026, 11:39 PM

#

often they use circularly linked lists bc then its branchless to add and remove an item to it

craggy nacelle May 28, 2026, 11:40 PM

#

the only reason i use generic lists is because i couldn't be bothered manually managing it in the scheduler

#

but i absolutely could make schedule not allocate anything and move what i need to a thread, i just did it this way for now

craggy nacelle May 29, 2026, 12:42 AM

#

#

cc @dusk coyote

dusk coyote May 29, 2026, 12:42 AM

#

very nice

craggy nacelle May 29, 2026, 2:05 AM

#

augh dammit i wanted to run this on real hardware and it's just crashing starting the scheduler now

#

it's jumping to NULL somewhere and the backtrace is not useful at all

#

it doesn't even get to init

#

ah wait i fixed it

#

oh okay i fixed it entirely

#

#

i just kinda guessed what was wrong

#

#

this works flawlessly

#

openbox works awesome too

craggy nacelle May 29, 2026, 10:43 AM

#

Xorg was still running when I woke up

#

But nyancat and doom were frozen after 5h of runtime

#

And when I tried minimizing something in the fvwm3 sidebar if deadlocked

#

I tried getting a pick but discord fucking deleted it

craggy nacelle May 29, 2026, 3:31 PM

#

wow compiling with -O0 makes zstd take half a minute to decompress my initrd 💀

#

at -O2 it takes 4 seconds under tcg

#

why the fuck

#

thanks i3

#

wow init is killing itself

#

my code is very good™

craggy nacelle May 29, 2026, 4:16 PM

#

ok i broke xorg when i boot with a hdd yesterday nooo

#

fuck me man

craggy nacelle May 30, 2026, 12:00 PM

#

i spent the whole fucking night trying to make movistar's iptv work on my mikrotik only to realize that the tv in the living room is connected behind a unmanaged fucking switch and that my vlan isolation would've broken the smart tv

#

so i have to get a fucking managed switch

#

i hate this house's wiring

obtuse glen May 30, 2026, 12:57 PM

#

craggy nacelle wow compiling with -O0 makes zstd take half a minute to decompress my initrd 💀

how big is your initrd

#

that sounds.... wrong

#

by default I build my kernel with -O0 and my rootfs on usb is about 70mb and that doesn't take anywhere near so long to decompress, like fractions of a second

craggy nacelle May 30, 2026, 1:12 PM

#

obtuse glen how big is your initrd

123mib compressed, 423mib uncompressed

#

maybe meta's zstd decompressor is just terrible at -O0

obtuse glen May 30, 2026, 1:16 PM

#

maybe

#

what do you have in initrd that it needs to be 423mb

#

this is 10x the size of windows 95

craggy nacelle May 30, 2026, 1:17 PM

#

obtuse glen what do you have in initrd that it needs to be 423mb

i think it's so big because i dont strip binaries when building the userspace

#

plus i do have like 4 wms built, ~90 packages

obtuse glen May 30, 2026, 1:20 PM

#

in the initrd?

#

that isn't what initrd is for surely

craggy nacelle May 30, 2026, 1:20 PM

#

obtuse glen that isn't what initrd is for surely

ah well, its more of a live system than initrd

obtuse glen May 30, 2026, 1:21 PM

#

that explains the size

craggy nacelle May 30, 2026, 1:21 PM

#

i don't have an initrd in the traditional sense, i can opt to either make an ext2 hdd image or a "live cd"

obtuse glen May 30, 2026, 1:21 PM

#

I only use an image type system like that when booting from usb

#

the usb has a gzipped iso that limine loads as a module, decompresses to ram and mounts

#

else I just read direct from the fs with no need for any initrd style system

craggy nacelle May 30, 2026, 1:23 PM

#

yeah same

craggy nacelle Jun 1, 2026, 1:01 AM

#

i've been working on making this crash less for the past few days

#

it's a bit more stable i think but

#

not as much as i'd want it to be after working on it for this long

#

but i guess stuff goes like this sometimes

#

i also have to fix ptys now

craggy nacelle Jun 1, 2026, 11:53 AM

#

okay okay yeah i think the scheduler fixes made my broken pty cleanup code finally show lmao

#

actually maybe it isn't? commenting it out did nothing

#

weeeird

craggy nacelle Jun 2, 2026, 7:34 PM

#

so uh me from like 4 months ago forgot to properly implement pty cleanup if the master is killed instead of exiting cleanly

#

but its all fixed now

#

i need to get a wallpaper for this

craggy nacelle Jun 2, 2026, 9:29 PM

#

how did i break this even

#

oops i broke some shit i shouldn't have touched in the first place

#

fixed

#

now we're talking

#

(yes i did go to openbox and use fvwm-root but fvwm works too)

craggy nacelle Jun 2, 2026, 11:34 PM

#

noooo

#

it was running so good lmao

#

except that when i moved my mouse cursor even a little bit half of the dooms would start running at <1fps but i think that's because i removed my old scheduler balancing code

#

i'll rewrite it soon™ but it was causing issues from what i could see

craggy nacelle Jun 2, 2026, 11:36 PM

#

craggy nacelle it was running so good lmao

-smp 16 btw

#

i think there's also quite a bit of slowdown from tlb shootdowns maybe?

#

that's for later

faint knot Jun 3, 2026, 4:51 PM

#

craggy nacelle noooo

too many dooms

craggy nacelle Jun 3, 2026, 8:31 PM

#

so every time i've started up fvwm in this i've always moved my mouse cursor around because when i first ported it iirc there was a race condition or something that made xorg not wake up when fvwm finished loading and all, but moving the mouse cursor aggressively in xorg makes it load waaay slower than if i don't do anything

#

so i thought that it loaded ultra slow on the ext2 disk but no it takes 12s which is not bad compared to like the >30s it took when i first ported it back in february iirc

#

on an initrd it takes 4s

#

but yeah that bug that made me move the cursor so it didn't lock up seems to be gone and i have NO idea when it might've disappeared

craggy nacelle Jun 3, 2026, 9:16 PM

#

i finally fixed the mouse in xorg moving 3px at a time always

#

i was using an if instead of a while in my ps2 driver.

#

i'm so disappointed

sullen crag Jun 4, 2026, 11:35 AM

#

Smartest OsDever:

#

/jk

craggy nacelle Jun 4, 2026, 12:00 PM

#

to be fair, i have no idea how a triple wakeup would happen since the only place i wake it up is in my irq handler and that's only when i finish a packet

craggy nacelle Jun 4, 2026, 1:34 PM

#

fixed shutting down and rebooting deadlocking

#

nevermind fuck me

#

i forgot to test in xorg and it deadlocked 😔

frail fog Jun 4, 2026, 1:35 PM

#

craggy nacelle nevermind fuck me

ok

craggy nacelle Jun 4, 2026, 1:44 PM

#

fixed

#

and now the "temporary" cli/sti i had in malloc for like 4 months is gone now (it was only there because i had nasty race conditions back then) and that should help a lot with performance

#

and it deadlocked starting fvwm3 on 16 cores 💀

#

oh well i'll actually fix it later

craggy nacelle Jun 4, 2026, 9:08 PM

#

so i fixed 2 deadlocks and one use after free in the process but all the 16 cores are really hammering this single heap

#

so i'll prolly have to write a per-cpu slab or smth sometime

#

that's for later

craggy nacelle Jun 6, 2026, 1:02 AM

#

gcc runs again

#

pls ignore wtf is going on with tarfs

craggy nacelle Jun 6, 2026, 1:22 AM

#

and the compiler seems to be able to compile

craggy nacelle Jun 6, 2026, 4:56 PM

#

holy shit how did i procrastinate this so much

soft charm Jun 6, 2026, 4:56 PM

#

craggy nacelle holy shit how did i procrastinate this so much

lowk me w anything

craggy nacelle Jun 6, 2026, 4:57 PM

#

i made my kernel use gs for kernel gls instead of whatever i was using before (using cpuid for every this_cpu() call...) and the kernel legit runs so much better now

#

haven't done a benchmark but

#

xorg is noticeably smoother smh

#

i mean this is how every kernel does it but

#

i was lazy as fuck when i wrote my smp code

#

oh holy shit this is -O0 too??

#

oh my god fvwm3 starts instantly now

primal quest Jun 6, 2026, 5:34 PM

#

craggy nacelle i made my kernel use gs for kernel gls instead of whatever i was using before (u...

why would you use cpuid for that

craggy nacelle Jun 6, 2026, 5:34 PM

#

primal quest why would you use cpuid for that

what past me was probably thinking is that i could use the bspid to index into my cpu array to get the current cpu

#

but that's slow as fuck

primal quest Jun 6, 2026, 5:34 PM

#

no... just use gsbase

craggy nacelle Jun 6, 2026, 5:35 PM

#

that's what i do now

primal quest Jun 6, 2026, 5:35 PM

#

on x86_64 you don't even need to check its presence as it's always there (i'm pretty sure)

craggy nacelle Jun 6, 2026, 5:35 PM

#

yeah i think so too

#

i think gcc doubled in speed

craggy nacelle Jun 6, 2026, 7:10 PM

#

this finally runs well

#

(-smp 2 and kvm)

mossy tiger Jun 6, 2026, 8:33 PM

#

craggy nacelle

https://tenor.com/view/elisttm-snow-leopard-eyes-lets-take-a-look-gif-17708647060006114487

Tenor

craggy nacelle Jun 6, 2026, 10:22 PM

#

this went from taking ~4s today to like under 750ms

#

46 frames in kdenlive @ 60fps so 766.66ms

craggy nacelle Jun 7, 2026, 12:35 AM

#

make

craggy nacelle Jun 7, 2026, 1:01 AM

#

it's doing shit

craggy nacelle Jun 7, 2026, 1:20 AM

#

so i had to compile nasm as well

#

and it got so close to finishing

#

it locked up when it had 3 files left

craggy nacelle Jun 7, 2026, 2:08 PM

#

on my sandy bridge laptop

#

i5-2450M

#

oh what the heck it ran out of memory

daring tendon Jun 7, 2026, 2:08 PM

#

Gg

craggy nacelle Jun 7, 2026, 2:09 PM

#

i think something was memory leaking for some reason

#

after a reboot

#

it has heaps of memory so idk how it memory leaked so hard it crashed

craggy nacelle Jun 7, 2026, 9:25 PM

#

oh wow on tmpfs it actually compiled the kernel

#

i didn't make it make an iso because i haven't compiled xorriso and that stuff but

#

hmm and on smp with a livecd it crashes or deadlocks

craggy nacelle Jun 7, 2026, 9:50 PM

#

so i fixed the crashes

#

i wasn't swapping gs on isr entry

#

hmm i can't get it to deadlock like before on tcg tho

#

the system is suffering a lot tho because i only have one heap for the whole system

#

and the way i have it rn is just a huge bottleneck for everything

craggy nacelle Jun 7, 2026, 10:22 PM

#

ok i finally found the deadlock

#

nvm i didn't

#

oh wait i forgot to also fix sched_find_next

craggy nacelle Jun 7, 2026, 10:51 PM

#

well now i'm getting memory corruption so i'll put it back where it was for now...

#

but yeah all of these deadlocks are probably gonna be solved when i write my own heap

#

so i can have per-core allocators

craggy nacelle Jun 7, 2026, 11:07 PM

#

craggy nacelle i wasn't swapping gs on isr entry

yeaaaah so uh right after i pushed the fix it started crashing the same way

#

so thats great

craggy nacelle Jun 8, 2026, 2:19 AM

#

imma buy a usb3 flash drive tomorrow cause the fastest I have is a 20mb/s 128gb micro SD card from my gopro

#

I finally realized that new flash drives are actually quick

#

And that I probably wasted an hour of my time implementing zstd into my kernel

craggy nacelle Jun 8, 2026, 11:04 PM

#

craggy nacelle hmm and on smp with a livecd it crashes or deadlocks

this is so annoying to debug

#

cause on kvm i can kinda get it to do that quite often if i try hard enough, but on tcg where i can actually hook up gdb i can't

#

wait

#

since when can you hook up gdb to kvm

#

omg

#

bruh this makes my life so much easier 😭

#

istfg this wasn't possible a while back

clear warren Jun 8, 2026, 11:06 PM

#

craggy nacelle since when can you hook up gdb to kvm

huuh forever?

#

you just have to use hb and awatch instead of b and watch

craggy nacelle Jun 8, 2026, 11:07 PM

#

damn

#

i've always used tcg to debug with gdb in qemu before

#

this is so so useful

clear warren Jun 8, 2026, 11:13 PM

#

craggy nacelle this is so so useful

there is a downside with kvm tho

#

you are limited to 10 breakpoints active in total

craggy nacelle Jun 8, 2026, 11:13 PM

#

that's fine

#

i don't use them that much anyway

#

printf debugging ftw

#

nah but this is so useful for catching deadlocks that only happen on kvm for example

clear warren Jun 8, 2026, 11:14 PM

#

also, you running in wsl or linux?

craggy nacelle Jun 8, 2026, 11:14 PM

#

uh arch linux

clear warren Jun 8, 2026, 11:15 PM

#

bc those deadlocks normally mean race conditions

craggy nacelle Jun 8, 2026, 11:15 PM

#

i know

clear warren Jun 8, 2026, 11:15 PM

#

and i found out that wsl is far slower than linux

#

but

#

that can be a good thing

#

some deadlocks will only show up in wsl XD

#

not on tcg or linux

craggy nacelle Jun 8, 2026, 11:15 PM

#

eh

#

usually for me as long as it works in kvm and tcg it's good

clear warren Jun 8, 2026, 11:16 PM

#

💀

craggy nacelle Jun 8, 2026, 11:16 PM

#

i test on real hw anyway and on potato core 2 duos at 1.2ghz sometimes

craggy nacelle Jun 9, 2026, 11:27 AM

#

i finally found the deadlock last night and it was... me doing cli/sti in malloc again

#

yeah so that was a bad idea from the beggining and i had to get rid of it and actually fix what it was masking

#

and then i had to fix exec not blocking all signals while it execs cause if i get signals delivered mid-exec we're fucked

#

along with a few other fixes

#

it seems to compile my kernel reliably now without crashing

clear warren Jun 9, 2026, 11:49 AM

#

craggy nacelle i finally found the deadlock last night and it was... me doing cli/sti in malloc...

lol

craggy nacelle Jun 9, 2026, 12:16 PM

#

i added scrolling to the ps2 driver

#

it was like 5loc

#

i also made the pty send sigwinch when the window size changes and that was also 5loc

craggy nacelle Jun 9, 2026, 1:47 PM

#

ok this isn't very stable with -smp 12 :(

clear warren Jun 9, 2026, 1:48 PM

#

lol

#

i'm testing my os at smp 10

craggy nacelle Jun 9, 2026, 1:48 PM

#

ok wtf even with -smp 2 i'm crashing more than i should

craggy nacelle Jun 9, 2026, 3:11 PM

#

ah yes i love it when doom just keeps running even after the system ran out of memory

craggy nacelle Jun 9, 2026, 3:41 PM

#

mhhhh ok i thought that the 5 commits i've done in the past few days have made it more stable

#

ig not enough

#

seems like i've got some memory corruption going on in the vfs?

craggy nacelle Jun 9, 2026, 8:41 PM

#

after coming back at this after a few hours with a fresh mind and debugging again, i finally 100% found the cause of the deadlocks and crashes i think

#

ayyyyy it finished both compiles without crashing

#

it triple faulted with 4 copies of bentobox compiling at the same time :(

#

at least my deadlock fix worked tho

craggy nacelle Jun 9, 2026, 9:12 PM

#

bruh

#

seems like some random bot account

#

and this is claiming a case that never happens

#

sched_setup_stack always takes a kernel argv and envp it never takes arguments from userspace and the fix this shit provided is just stupid and wouldn't help anyway

obtuse glen Jun 9, 2026, 9:25 PM

#

craggy nacelle bruh

ban it ban it

#

it's the most stupid AI security pr bot ever

craggy nacelle Jun 9, 2026, 9:25 PM

#

obtuse glen ban it ban it

you can do that?

obtuse glen Jun 9, 2026, 9:26 PM

#

it tried to say my os had a bug and it turned out the value it said could overflow was fed by qemu not the end user

#

and then I pointed it out, it force pushed irrelevant docs changes to its pr

#

tried to change auto generated html files

#

added unit tests when I don't have a unit test framework

#

it's just dumb af

craggy nacelle Jun 9, 2026, 9:27 PM

#

obtuse glen added unit tests when I don't have a unit test framework

same here

obtuse glen Jun 9, 2026, 9:27 PM

#

I reported it as spam

obtuse glen Jun 9, 2026, 9:27 PM

#

craggy nacelle you can do that?

click 3 dots next to the pr

#

choose block user iirc

#

you can ban it from your org

craggy nacelle Jun 9, 2026, 9:28 PM

#

ah you go to the profile of the account and then block it from there

#

ty

obtuse glen Jun 9, 2026, 9:29 PM

#

yw 🙂 burn it with fire

craggy nacelle Jun 9, 2026, 9:58 PM

#

so apparently the amount of tlb invalidations im sending on -smp 12 is enough to overflow my 64k kernel stacks and triple fault

#

really weird as it should be enough...

craggy nacelle Jun 10, 2026, 12:35 AM

#

hmm so i left this running on my laptop for 5h and like last time, at around 5h of uptime nyancat and doom froze for some reason

#

and it isn't even an smp issue since i've been running this with nosmp to see if it would make a difference compared to last time

#

maybe i have some timer overflow fucking everything up?

#

Absolutely

#

(this is meant to be at least 19600s in)

craggy nacelle Jun 10, 2026, 1:15 AM

#

obtuse glen yw 🙂 burn it with fire

i was curious and discovered all of their footer links redirect to the homepage

#

so so fake

mossy tiger Jun 10, 2026, 1:54 AM

#

craggy nacelle bruh

This kind of shi is why curl closed their bug bounties btw

craggy nacelle Jun 10, 2026, 12:52 PM

#

so the bug i know of rn with smp is that if i'm compiling 4 copies of my kernel on -smp 12, there will be so much irq overhead that one of my 64kb kernel stacks will overflow and make that cpu triple fault and take the whole machine down

#

but that's not worrying me too much rn

craggy nacelle Jun 10, 2026, 12:54 PM

#

craggy nacelle noooo

and maybe this

#

actually, on -smp 12 (since my 5600x i'm using rn has 4 fewer threads) and with 12 dooms open and 6 sts open instead of 9 and 3, it's not crashing at all

#

i had to use 2 fvwm desktops since i couldn't fit that many of them on my 1080p screen but it's running just fine

craggy nacelle Jun 10, 2026, 1:03 PM

#

craggy nacelle except that when i moved my mouse cursor even a little bit half of the dooms wou...

and moving the mouse also works just fine (probably because i also made sched_wake wake up idling cpus if the thread i'm trying to wake is on there, but i still don't do balancing)

#

i had to do that to achieve fast fvwm3 startups

craggy nacelle Jun 10, 2026, 1:58 PM

#

craggy nacelle actually, on -smp 12 (since my 5600x i'm using rn has 4 fewer threads) and with ...

it crashed after a while and while it seems like a weird ass crash, on another core i could see that it tried to panic because it ran out of memory

#

so i may have a memory leak somewhere...

solemn axle Jun 10, 2026, 4:26 PM

#

craggy nacelle so the bug i know of rn with smp is that if i'm compiling 4 copies of my kernel ...

How

#

64KB is GIGANTIC

coral ravine Jun 10, 2026, 4:27 PM

#

craggy nacelle so the bug i know of rn with smp is that if i'm compiling 4 copies of my kernel ...

this feels weirdly specific

craggy nacelle Jun 10, 2026, 4:27 PM

#

solemn axle 64KB is GIGANTIC

absolutely no clue

#

i'll have to debug further but increasing the stack size to 256kb seemed to work

solemn axle Jun 10, 2026, 4:28 PM

#

How could "IRQ overhead" possibly be causing that

#

Do you even have nested interrupts

craggy nacelle Jun 10, 2026, 4:28 PM

#

no i don't that's why i'm confused too

#

but that's what i assumed it could've been

solemn axle Jun 10, 2026, 4:29 PM

#

It's almost certainly not just from an ISR stack frame

#

Unless you're allocating a like 60KB buffer on the stack somewhere

craggy nacelle Jun 10, 2026, 4:29 PM

#

well yeah and no i don't allocate huge stack buffers

solemn axle Jun 10, 2026, 4:30 PM

#

craggy nacelle i'll have to debug further but increasing the stack size to 256kb seemed to work

This is probably masking something rather than fixing an overflow

#

If it is an overflow then you're being really egregious with stack usage somewhere

#

Like many levels of recursion or something

craggy nacelle Jun 10, 2026, 4:31 PM

#

solemn axle This is probably masking something rather than fixing an overflow

mmm yeah i should try -d int and see what it says

solemn axle Jun 10, 2026, 4:31 PM

#

Keep in mind the Windows kernel probably has 3x as many levels of nesting as you and they get away with an 8K kernel stack

craggy nacelle Jun 10, 2026, 4:31 PM

#

only 8k?

solemn axle Jun 10, 2026, 4:31 PM

#

Yes that's a pretty typical kernel stack size

#

For a modern kernel

craggy nacelle Jun 10, 2026, 4:31 PM

#

i used to do 16k in my old kernel but i bumped it to 64k when i rewrote it since that's what limine did and it seemed reasonable enough

solemn axle Jun 10, 2026, 4:32 PM

#

16k is too big

#

You're highly unlikely to need more than 4K in your hobby kernel

craggy nacelle Jun 10, 2026, 4:32 PM

#

hm oh well

craggy nacelle Jun 11, 2026, 11:16 PM

#

my serial driver has a scheduler wakeup deadlock i cba to fix rn

#

just noting it

craggy nacelle Jun 12, 2026, 3:06 PM

#

I'm tired

#

Not of working on this but because I've stayed up to 5am again trying to get iptv working

#

Seems like iptv in my house uses dynamic NAT-PAT but if I go to the HGU's advanced settings and go to vlan2 it uses a static ip?

#

Honestly fuck Movistar

craggy nacelle Jun 12, 2026, 6:12 PM

#

after leaving this idling for ~50 minutes (i had to do shit irl) and trying to run the 4 compilations at the same time it hasn't triple faulted

#

i can't replicate the triple fault with -smp 2 anymore? wtf

craggy nacelle Jun 14, 2026, 12:37 PM

#

took a small break from this because debugging this shit is tiring

#

i can probably fix it if i debug enough but i'd rather do something else like

#

implementing tsc timing would make boot decently faster (~200ms) since my root filesystem is 1gb

#

well, technically i don't need to for that exact case but it would be better anyway

craggy nacelle Jun 14, 2026, 1:33 PM

#

gdb is not cooperating

craggy nacelle Jun 16, 2026, 3:37 PM

#

so another 2 days have passed

#

might work on smth

craggy nacelle Jun 16, 2026, 4:05 PM

#

or i could try reviving my silly bios bootloader

craggy nacelle Jun 16, 2026, 6:25 PM

#

holy shit the perf has gotten a lot better

craggy nacelle Jun 16, 2026, 7:32 PM

#

great and on my other pc its fucking deadlocking acquiring a spinlock in the vfs

#

this is with the default qemu flags i use that always work too

#

what the fuck

solemn axle Jun 16, 2026, 7:37 PM

#

Why's there a spinlock in the vfs

craggy nacelle Jun 16, 2026, 7:38 PM

#

my polling code uses it for the waiters list

solemn axle Jun 16, 2026, 7:39 PM

#

why can't it be a blocking mutex

craggy nacelle Jun 16, 2026, 7:39 PM

#

because its meant to only acquire it for a short period of time

#

which is why im confused as to why its leaving it held and making it deadlock

dusk coyote Jun 16, 2026, 7:45 PM

#

funnily enough in the magazines paper it is stated that disabling interrupts is more expensive than just taking a mutex

#

and that was 25 years ago, I wouldn't put it behind intel and amd engineers to have made atomics much faster than changing interrupt state

solemn axle Jun 16, 2026, 7:49 PM

#

Maybe their mutex isn't optimized

#

It's cool how with software IPL you don't need to disable or enable interrupts on almost any spinlock

craggy nacelle Jun 16, 2026, 9:58 PM

#

ok i found the deadlock

#

major skill issue on my side

solemn axle Jun 16, 2026, 10:06 PM

#

craggy nacelle ok i found the deadlock

what was it

craggy nacelle Jun 16, 2026, 10:06 PM

#

so my dumb fuck thought it was a good idea to cli/sti in my pmm to avoid the case where my cow handler tries to allocate a page, but whoever is allocating pages rn got preempted and deadlocks

#

i think i can make it atomic

#

oh wait no i can't

daring tendon Jun 16, 2026, 10:08 PM

#

how did they get preempted if u have a cli

craggy nacelle Jun 16, 2026, 10:08 PM

#

wait you have a point 💀

#

ok nvm then i didn't find the deadlock

#

but when i remove cli/sti from my pmm i don't get the deadlock anymore

#

so maybe its related to that somehow

daring tendon Jun 16, 2026, 10:13 PM

#

do u literally cli sti or do u understand the concept of nested cli

craggy nacelle Jun 16, 2026, 10:14 PM

#

i don't nest them in the first place

daring tendon Jun 16, 2026, 10:14 PM

#

u cant possibly know that

#

anything that calls that function from an irq handler already nests that

craggy nacelle Jun 16, 2026, 10:15 PM

#

my cli/sti are macros and if its in an irq context they won't run

daring tendon Jun 16, 2026, 10:15 PM

#

easy to check, just add a

void cli()
{
    BUG_ON(!(rflags() & IF));
    cli();
}

craggy nacelle Jun 16, 2026, 10:15 PM

#

will try

craggy nacelle Jun 16, 2026, 10:16 PM

#

daring tendon u cant possibly know that

but anyway i only have 13 cli calls in my kernel so i kinda doubt that

daring tendon Jun 16, 2026, 10:16 PM

#

you're not counting irq handlers indirectly reaching that code like i mentioned

craggy nacelle Jun 16, 2026, 10:17 PM

#

i said my macros won't run the instruction if it's in an irq context...

#

i have check for that

daring tendon Jun 16, 2026, 10:17 PM

#

show

craggy nacelle Jun 16, 2026, 10:17 PM

#

#define cli() if (this_cpu->current_irq == 0xff) asm ("cli");
#define sti() if (this_cpu->current_irq == 0xff) asm ("sti");

#

0xff = not in an irq context

daring tendon Jun 16, 2026, 10:17 PM

#

well never hurts to check either way

craggy nacelle Jun 16, 2026, 10:17 PM

#

yeah i will

daring tendon Jun 16, 2026, 10:17 PM

#

to enforce your invariant

craggy nacelle Jun 16, 2026, 10:23 PM

#

nope

#

its not triggering

daring tendon Jun 16, 2026, 10:28 PM

#

nooo

craggy nacelle Jun 16, 2026, 10:29 PM

#

seems like if i just return from acquire in gdb in the deadlocking spinlock it runs just fine?

#

like it doesn't deadlock again

#

hmm

#

maybe the thread that is holding node->waiters_lock is getting blocked by someone else on another thread and not waking up?

#

cause i don't protect against that

#

and maybe removing cli/sti just changes the timing enough or something that it doesn't deadlock

craggy nacelle Jun 16, 2026, 11:20 PM

#

so uh

#

i'll just cli when i acquire the lock

#

i only acquire it for a very short time anyway

#

can't think of a better solution that would make my kernel not triple fault at boot

#

(pls don't make me explain that)

#

actually, i got away without adding extra cli/sti

#

seems like i just had to make it so i don't allocate memory while holding that lock that was deadlocking

#

is it a good approach? no, am i lazy too lazy to fix the pmm instead? yes

solemn axle Jun 17, 2026, 12:09 AM

#

craggy nacelle can't think of a better solution that would make my kernel not triple fault at b...

Explain that

craggy nacelle Jun 17, 2026, 12:12 AM

#

solemn axle Explain that

well, there is a small gap while i'm starting the scheduler where this is just null, and when that happens anything that will try to read it will immediately fault

#

and why the triple fault and not just a normal exception? im not sure, but i dont think it really matters anyway

craggy nacelle Jun 17, 2026, 12:12 AM

#

craggy nacelle well, there is a small gap while i'm starting the scheduler where `this` is just...

since spinlocks are used in quite a few places then i think its just that

#

i could've made it work but its 2am and yeah

craggy nacelle Jun 17, 2026, 12:42 AM

#

well that's great

#

i spent a while porting sdl2 just for this to be complaining about audio when i already patched it and deadlocking my system for no reason?? (its not even deadlocking on a spinlock, something weird is happening)

#

and its supposed to be the "good" emulator
https://github.com/ObaraEmmanuel/NES

GitHub

GitHub - ObaraEmmanuel/NES: NES emulator written in C

NES emulator written in C. Contribute to ObaraEmmanuel/NES development by creating an account on GitHub.

#

ok i can't figure this out nooo

craggy nacelle Jun 17, 2026, 4:37 PM

#

craggy nacelle

apparently this thing actually has pen support in the bios setup??

#

vga text mode touchscreen is truly cursed

craggy nacelle Jun 17, 2026, 6:25 PM

#

welp, i finally finished the wacom driver

#

i had some small issues in it and all but it works with xorg and it works awesome

#

sorry for the terrible video lmao my phone wasn't cooperating

dusk coyote Jun 17, 2026, 6:33 PM

#

Wtf they done make qemu usb-tablet irl

daring tendon Jun 17, 2026, 6:34 PM

#

craggy nacelle

Thats pretty cool

craggy nacelle Jun 17, 2026, 6:35 PM

#

the next step would be to detect if its present using acpi as rn i just try to initialize the serial port and return if it fails

daring tendon Jun 17, 2026, 6:42 PM

#

Do u handle it via a special line discipline?

craggy nacelle Jun 17, 2026, 6:47 PM

#

nope, i just register the irq to my own handler and read it that way

#

i could reuse the one in my serial driver but i just didn't when i implemented the logic for this like 2mo ago

craggy nacelle Jun 17, 2026, 6:50 PM

#

daring tendon Do u handle it via a special line discipline?

it could be interesting to do it that way tho

daring tendon Jun 17, 2026, 6:52 PM

#

technically thats how you're supposed to ™ do it

craggy nacelle Jun 17, 2026, 6:54 PM

#

yea makes sense

#

tho the linux driver actually does the same thing i do lmao

#

they just

static irqreturn_t w8001_interrupt(struct serio *serio,
                   unsigned char data, unsigned int flags)
{
    struct w8001 *w8001 = serio_get_drvdata(serio);
    struct w8001_coord coord;
    unsigned char tmp;

    w8001->data[w8001->idx] = data;
    switch (w8001->idx++) {
        (...)

#

well hmm but they do use serio_get_drvdata

#

idk im no expert in linux internals

daring tendon Jun 17, 2026, 7:00 PM

#

https://elixir.bootlin.com/linux/v7.1/source/drivers/input/serio/serport.c this is the line discipline driver

#

config SERIO_SERPORT
    tristate "Serial port line discipline"
    default y
    depends on TTY
    help
      Say Y here if you plan to use an input device (mouse, joystick,
      tablet, 6dof) that communicates over the RS232 serial (COM) port.

      More information is available: <file:Documentation/input/input.rst>

      If unsure, say Y.

      To compile this driver as a module, choose M here: the
      module will be called serport.

#

Is this wacom actually exposed over a com port?

craggy nacelle Jun 17, 2026, 7:01 PM

#

its on port 0x220

#

so not a standard serial port but it is serial

craggy nacelle Jun 17, 2026, 7:01 PM

#

daring tendon https://elixir.bootlin.com/linux/v7.1/source/drivers/input/serio/serport.c this ...

ah i see

daring tendon Jun 17, 2026, 7:02 PM

#

It's N_MOUSE apparently

dusk coyote Jun 17, 2026, 7:36 PM

#

Broke: propriterary shit
Woke: hid over serial troll

obtuse glen Jun 17, 2026, 9:56 PM

#

if it is in sleep mode you have to WOKE it up?

craggy nacelle Jun 18, 2026, 7:00 PM

#

apparently i somehow fixed xclock not ticking?

#

i thought it needed itimers but i suppose it must've been some kernel bug i fixed recently

#

(yes they are still stubs in my mlibc fork)

craggy nacelle Jun 18, 2026, 9:01 PM

#

should i brag about this running with touch support in r/osdev

#

or nah

daring tendon Jun 18, 2026, 9:13 PM

#

Yeah the video was pretty cool imo

craggy nacelle Jun 19, 2026, 11:09 AM

#

i think i finally managed one of my gs bugs

#

i had a race condition where there could be a smp shootdown irq while i was restoring the user context in my syscall assembly stub

#

and i forgot to cli in that stub before restoring the registers 💀

craggy nacelle Jun 19, 2026, 11:26 AM

#

craggy nacelle seems like i've got some memory corruption going on in the vfs?

seems like some vmas are corrupting when i run the kernel with -smp 16

#

im not quite sure why

craggy nacelle Jun 19, 2026, 6:13 PM

#

On the tablet PC

#

Running at 800x600@60hz since it's the highest this thing will take before not syncing

dusk coyote Jun 19, 2026, 6:14 PM

#

CDE must go hard on that screen

craggy nacelle Jun 19, 2026, 6:16 PM

#

Only if I had it ported 😔

#

I should do that

#

But in the meantime I'll enjoy doom in b&w

craggy nacelle Jun 19, 2026, 11:19 PM

#

I think my code has gotten a bit better

#

(old bentobox, might have sent this clip a long time ago here already but here it is again)

craggy nacelle Jun 20, 2026, 4:05 PM

#

i am lazy

craggy nacelle Jun 21, 2026, 2:08 AM

#

I want to write a proper IRQ subsystem instead of manually registering to the IDT and IOAPIC as that opens me up to modern devices that use MSI/-X

#

But uhh it's 4am so I should sleep first

#

I'm also considering writing an NVMe driver although I'm not sure if I should do vio-blk first or not

#

And obviously having XHCI would be nice but I know I'll be too lazy to implement it in a long time

#

But I'll probably bring Bach aarch64 before that

#

Ah yes Johann Sebastian Bach

craggy nacelle Jun 22, 2026, 1:25 AM

#

I did no work yesterday KEKW

#

I only debugged a bit why bash bails out when I SIGINT it and I think it's because I'm missing syscall interruption

craggy nacelle Jun 24, 2026, 3:38 PM

#

holy shit my signals are COMPLETELY broken

#

what's happening:

bash runs a syscall
get preempted
signal code saves the USER context instead of the kernel context
userspace signal handler runs
sigreturn restores the old USER context instead of the old KERNEL context
suddenly ppoll gets cut off mid-execution and bash is confused as fuck as to what happened
bash bails out and exits

#

and i didn't catch this when writing my signal code 6 months ago since my test code would work fine as it wouldn't really check the output of the syscall

#

yay i have to write more assembly...

#

(i don't mind it)

solemn axle Jun 24, 2026, 4:27 PM

#

craggy nacelle what's happening: 1. bash runs a syscall 2. get preempted 3. signal code saves t...

U know it's not supposed to restore kernel context ever right

craggy nacelle Jun 24, 2026, 4:27 PM

#

solemn axle U know it's not supposed to restore kernel context ever right

yeaaa but what do i do instead

#

cause if i don't do that i'll memory leak if a syscall allocates memory (they do)

solemn axle Jun 24, 2026, 4:28 PM

#

Signals cause the syscall to abort

#

If it's in a wait you wake the wait with a status indicating to the caller of the wait function (your syscall impl) that a signal interrupted it

#

You see this status and clean up and exit from the syscall

craggy nacelle Jun 24, 2026, 4:29 PM

#

oh yeah i see now 😭

solemn axle Jun 24, 2026, 4:29 PM

#

Then the signal is dispatched upon return to usermode

craggy nacelle Jun 24, 2026, 4:29 PM

#

yea yea makes sense

#

my assembly code was triple faulting anyway

craggy nacelle Jun 25, 2026, 9:52 AM

#

yay i fixed everything

craggy nacelle Jun 25, 2026, 11:10 AM

#

and that also made the kernel leak zero memory!

#

damn

craggy nacelle Jun 25, 2026, 12:23 PM

#

1000th commit pushed

craggy nacelle Jun 25, 2026, 5:06 PM

#

imlib2 needs mmap for files nooo

#

otherwise it will refuse to load any images

craggy nacelle Jun 25, 2026, 6:02 PM

#

just implemented it hackily

craggy nacelle Jun 25, 2026, 7:08 PM

#

some nice screenshots i'll upload to the readme

craggy nacelle Jun 25, 2026, 7:32 PM

#

i'll have to come find my own and make a new package

craggy nacelle Jun 25, 2026, 9:58 PM

#

why do absolutely none of my machines have good ps2 emulation

#

my tablet pc's ps2 emulation is very funky and a lot of the times keys get stuck and its infurriating to type on

#

and if i type specific stuff it works

#

on my sempron le-1250 machine it doesn't emulate a ps2 mouse (i tried different keyboards, no luck)

#

and on everything else i have it claims it has emul but it doesn't

craggy nacelle Jun 26, 2026, 3:02 PM

#

#

probably will be useful on my tablet pc :p

#

it is

frail fog Jun 26, 2026, 6:30 PM

#

craggy nacelle why do absolutely none of my machines have good ps2 emulation

just

#

do

#

xhci

craggy nacelle Jun 26, 2026, 6:36 PM

#

yeaaa but im lazy

craggy nacelle Jun 28, 2026, 8:04 PM

#

working on a proper irq subsystem

#

i want to bring back aarch64 soon

sullen crag Jun 28, 2026, 8:15 PM

#

Port riscv64 instead trust trl

#

I mean the architecture is a lot simpler and easier than aarch or x86 and requires less to be fully implemented

craggy nacelle Jun 28, 2026, 8:16 PM

#

yeaaaa but you forgot that i already ported aarch64 over 6 months ago

#

it just bitrotted

#

and i also want proper irq shit on x86 so i can have irq allocation and msi easily etc etc

craggy nacelle Jun 28, 2026, 9:12 PM

#

sullen crag I mean the architecture is a lot simpler and easier than aarch or x86 and requir...

also my aarch64 specific code is like 1000loc and will get smaller meme

craggy nacelle Jun 30, 2026, 5:51 PM

#

time to try to bring back aarch64

#

this is gonna be fun

#

i also found out that if i use LTO and -O3 in my kernel i get 5.4M uacpi ops/s instead of 3.7M

#

so idk what to do with the benchmark score in the uacpi readme

#

man where do i even start with this

#

i guess building an aarch64 bare toolchain

#

and now its where i regret making the kernel source outside the jinx bootstrap folder cause now i can't use the same toolchain to build the userspace as the one to build the kernel

#

since the one in it builds weirdly iirc

#

or not

#

oh i can reuse it cool

#

i thought the paths would be all messed up but apparently not

#

ok this is what i feared

 xrc2  ~  src  bentobox  bootstrap  build-aarch64  jinx  host-pkgs/binutils/usr/local/bin/aarch64-pc-bentobox-as
host-pkgs/binutils/usr/local/bin/aarch64-pc-bentobox-as: error while loading shared libraries: libopcodes-2.46.0.20260210.so: cannot open shared object file: No such file or directory
 xrc2  ~  src  bentobox  bootstrap  build-aarch64  jinx 

frail fog Jun 30, 2026, 6:13 PM

#

craggy nacelle ok this is what i feared ``` xrc2  ~  src  bentobox  bootstrap  build-aarc...

tf is libopcodes

faint knot Jun 30, 2026, 6:13 PM

#

frail fog tf is libopcodes

library for opcodes trl

frail fog Jun 30, 2026, 6:14 PM

#

craggy nacelle ok this is what i feared ``` xrc2  ~  src  bentobox  bootstrap  build-aarc...

also it looks like you need to add your prefix lib dir to library dirs with env

#

like force glibc to use your prefix libdir

craggy nacelle Jun 30, 2026, 6:18 PM

#

frail fog tf is libopcodes

no clue

craggy nacelle Jun 30, 2026, 6:19 PM

#

frail fog also it looks like you need to add your prefix lib dir to library dirs with env

i think i found the issue

 xrc2  ~  src  bentobox  bootstrap  build-aarch64  jinx  cd host-pkgs/binutils/usr/local/
aarch64-pc-bentobox/ bin/                 include/             lib/                 share/               x86_64-pc-linux-gnu/ 
 xrc2  ~  src  bentobox  bootstrap  build-aarch64  jinx  cd host-pkgs/binutils/usr/local/
 xrc2  ~  src  …  binutils  usr  local  jinx  find . -name libopcodes*
./x86_64-pc-linux-gnu/aarch64-pc-bentobox/lib/libopcodes.so
./x86_64-pc-linux-gnu/aarch64-pc-bentobox/lib/libopcodes.a
./x86_64-pc-linux-gnu/aarch64-pc-bentobox/lib/libopcodes-2.46.0.20260210.so
 xrc2  ~  src  …  binutils  usr  local  jinx 

yup both libs are in there

icy wyvern Jun 30, 2026, 6:20 PM

#

craggy nacelle ok this is what i feared ``` xrc2  ~  src  bentobox  bootstrap  build-aarc...

imagine using powerline in prompt smh \j

craggy nacelle Jun 30, 2026, 6:21 PM

#

icy wyvern imagine using powerline in prompt smh \j

nothing wrong with it

icy wyvern Jun 30, 2026, 6:21 PM

#

craggy nacelle nothing wrong with it

yeah i was joking xD

#

heres mine btw, it also shows errs but i forgot to scrot

#

heres that

faint knot Jun 30, 2026, 6:24 PM

#

icy wyvern heres that

belu? like beluga?

#

no

icy wyvern Jun 30, 2026, 6:25 PM

#

faint knot belu? like beluga?

exactly

#

like the plane

faint knot Jun 30, 2026, 6:25 PM

#

i just do PS1="\w $ " nuke3

#

its plain but i like it

icy wyvern Jun 30, 2026, 6:25 PM

#

faint knot i just do ``PS1="\w $ "`` <:nuke3:1493462060565270569>

i have PS1=: lol

#

the rest is a PROMPT_CMD

#

PROMPT_CMD(){
    local exit_stat=$?
    local user="\x1b[48;2;58;58;58m $USER \x1b[0m"
    local os="\x1b[48;2;78;78;78m $HOSTNAME \x1b[0m"
    local file="\x1b[48;2;38;38;38m $PWD \x1b[0m"
    local err="\x1b[0m"
    (($exit_stat != 0)) &&\
        err="\x1b[48;2;255;175;95m\x1b[38;2;28;28;28m $exit_stat \x1b[0m"
    local chr=""
    chr="\x1b[48;2;58;58;58m${debian_chroot:+($debian_chroot)}\x1b[0m"
    local all="$user$os$file$err$chr\x1b[0m"
    printf "$all\n"
}

faint knot Jun 30, 2026, 6:27 PM

#

icy wyvern ```sh PROMPT_CMD(){ local exit_stat=$? local user="\x1b[48;2;58;58;58m $...

that is LONG

icy wyvern Jun 30, 2026, 6:27 PM

#

faint knot that is LONG

its not too bad

#

mostly colors

faint knot Jun 30, 2026, 6:28 PM

#

\033 > \x1b tho

#

trl

#bentobox