bentobox

[icy wyvern]

i prefer x1b ngl

[faint knot]

they are the same thing

[icy wyvern]

i know that

i prefer the hex repr tho

rather than octal

[faint knot]

Fairs

https://tenor.com/view/cat-thumbs-up-thumbs-up-cat-thumbs-up-meme-gif-5676038700371371386

[craggy nacelle]

yea i'll do that

cause that works

[craggy nacelle]

its fun seeing all the abi breakages ive had in the past 7 months

(a LOT)

just a few linker errors

[frail fog]

a few linker error

47 kb log

[craggy nacelle]

i am astonished

this is the first run and it didn't fully explode, incredible

[craggy nacelle]

this is more like what i was expecting lol

[craggy nacelle]

oh my god it can't just be this easy

:(

but holy shit i can use the serial tty just fine

it actually works

[craggy nacelle]

so of course it had to have some issue

i can't run more than one command in bash before it will crash

not sure if this is aarch64 specific or what (probably is tho) but its calling sigaction with some funky arguments

and since i dont have a safe user copy fail i just panic

[    2.992875] EL1-EL1 fault: Data Abort (current EL) on CPU 0
[    2.993222] // System consumed all the paper for paging!
[    2.993492] x0:  0x0000000000000001 x1:  0x0000555555b80000 x2:  0x0000555555bbeec0 x3:  0x000000000003ff90
[    2.993924] x4:  0x0000000000000000 x5:  0x0000555555b3ef00 x6:  0x0000000000000000 x7:  0x0000000000518000
[    2.994380] x8:  0x000000000000001a x9:  0x0000000000000000 x10: 0x0000000000000000 x11: 0x0000000000000000
[    2.994809] x12: 0x000000000000002c x13: 0x0000000000000000 x14: 0x0000000000000000 x15: 0x0000000000000000
[    2.995247] x16: 0x000000000050e598 x17: 0x000000004126df48 x18: 0x000000000000002d x19: 0x0000555555bbeec0
[    2.995597] x20: 0x00000000413220a0 x21: 0x00000000ffffffff x22: 0x00000000ffffffff x23: 0x0000555555bbef20
[    2.995895] x24: 0x0000000000000000 x25: 0x0000555555bbeea0 x26: 0x0000555555bbef10 x27: 0x0000000000000001
[    2.996191] x28: 0x000000000051ec30 x29: 0x0000555555653ac0 x30: 0x000000000042eb4c PC:  0xffffffff8000d95c
[    2.996484] ESR_ELx:  0x0000000096000046
[    2.996643] FAR_ELx:  0x000000000003ff91
[    2.996796] SPSR_ELx: 0x0000000020000345
[    2.996950] Call Trace:
[    2.997085]  #0 0x000000000042eb4c in (userspace)
[    2.997269]  #1 0x000000000043207c in (userspace)
[    2.997434]  #2 0x0000000000432a2c in (userspace)
[    2.997595]  #3 0x00000000004186d4 in (userspace)
[    2.997754]  #4 0x00000000004166c4 in (userspace)
[    2.997911]  #5 0x0000000041217214 in (userspace)
[    2.998064]  #6 0x00000000004171d8 in (userspace)

[craggy nacelle]

i have no fucking clue what is going on

seems like a race where the context is saved incorrectly but i can't even fucking find who is calling memset

i mean memcpy

[clear warren]

memcpy is auto called when you do an =

or memset too

[craggy nacelle]

is it

either way

[clear warren]

yes

[craggy nacelle]

i have not been able to get a good backtrace

not even one frame

thanks arm

[clear warren]

XD

[craggy nacelle]

i should be sleeping for an hour

but fuck this

[craggy nacelle]

welp its the next day and i fixed it

i... forgot to set current_irq in fault handlers so interrupts were being enabled by some stuff and kaboom

[faint knot]

glad u fixed it

this is one of the most impressive projects tbh

[craggy nacelle]

specifically do_cow

ty

[faint knot]

i could never

[craggy nacelle]

-smp 8 also seems to work (gicv2 cpu limit)

(ignore the mangled output i don't have working virtio drivers on aarch64 yet, i got rid of the mmio one since it sucked and i haven't gotten my pci one working there yet)

[faint knot]

can i ask a question?

im curious but why is ur os named bentobox?

[craggy nacelle]

no particular reason

just what i came up with

[craggy nacelle]

segfaults work

[craggy nacelle]

user copy is safe on arm now

(i had to borrow arm's own assembly memcpy implementation to be able to do this properly)

[frail fog]

just trust your userspace

[craggy nacelle]

https://tenor.com/view/plastic-man-real-real-powder-powder-that-makes-you-say-real-animated-comic-plastic-man-gif-7493651428267836743

[craggy nacelle]

virtio works

turns out i just forgot to add virtio-keyboard-pci to qemu 💀

[craggy nacelle]

just a few changes

[faint knot]

i had bigger changes on my os

like 3.5k lines added 500 lines removed

for a single commit

and i didnt even know what i added

so i just said "Big refactor (see diff)"

in the commit

😭😭

[craggy nacelle]

41 files changed, 524 insertions(+), 681 deletions(-)

[faint knot]

one time i switched to busybox userspace and deleted my own userspace

7k lines removed

😭

[craggy nacelle]

not bad

[craggy nacelle]

sdfjghskdlfjghskldfg

virtio tablet scaling is COMPLETELY fucked in xorg

not just in the y axis but also the x axis somehow??

[craggy nacelle]

it was pointer accel 😭

[craggy nacelle]

fvwm3 time

hmm the wallpaper doesn't work for some reason and opening st will just have it hang and after a bit it will crash

[faint knot]

i like the // messages in ur panics, is it randomized?

[craggy nacelle]

yes

[    9.156978] /usr/libexec/fvwm3/1.1.4/FvwmIconMan: Segmentation fault

hmm

might be missing something

[faint knot]

hmmm

[craggy nacelle]

and its only when i launch st where everything breaks

its specifically running bash that's fucking everything because i can open vim in st just fine

[faint knot]

bash is pretty difficult to get working perfectly

im still working on fixing my syscalls

so it works

😭

[craggy nacelle]

classic

my signals were implemented wrong for a looong time

[faint knot]

yeah no it dosent print unless i specifically press a key after i pressed enter

and pipe2 isnt implemented

😭

so it dosent really work

[craggy nacelle]

mmm

[faint knot]

gives ENOSYS

yeah no i have like over 100 syscalls but thats still not enough

for to run something properly

[craggy nacelle]

i have ~70

[faint knot]

and ur running xorg

wtf

😭

[craggy nacelle]

yea cause its my own syscalls

not linux's 345789 variants

for 1 syscall

[faint knot]

ahh its not posix, right?

[craggy nacelle]

anyway yeah its spamming shit with signals wtf

[craggy nacelle]

it is

but not linux

[faint knot]

i think it wants to setup the signal frame

[craggy nacelle]

yea it shouldnt be able to do that

[craggy nacelle]

the mouse cursor isn't feeling too good

i have absolutely no clue what would be causing this but its hilarious

[faint knot]

the mouse cursor turned to ash

[craggy nacelle]

this honestly feels about as stable as fvwm3 was on x86-64 when i first ported it

hmmm

i mean the arch-specific code is around from that time so idk

except that i've changed a bunch of it

i'm confused

at first it seems to be a heap address that's just big but that's unusally big no?

oh nvm it isn't actually

its only 21mb so seems like a not properly mapped page?

[faint knot]

which one is the instruction pointer

[craggy nacelle]

PC

[faint knot]

[faint knot]

thx

no that looks standard

are u using a static binary?

[craggy nacelle]

no its all dynamically linked

but i can tell you that's libc.so

[faint knot]

hmmm

thats sus

[craggy nacelle]

rtld links it there iirc

not really

[faint knot]

it should be at around 0x100000000, no?

[craggy nacelle]

not necessarily

if you look at rtld code its at around 0x41000000 iirc

and the fault is not at PC its at FAR_ELx

its a page fault reading from that address

maybe my cow code is fucked

[craggy nacelle]

so this is a flood of SIGSESVs

not sure why the handling is not working... but i should probably fix the reason why its doing this

the issue now is that its just good old memory corruption

[faint knot]

good news: i got bash to work ok!!

yay

[craggy nacelle]

so i think i have fixed one of the two issues

one was with signals and it was a mismatch between my arm and x86 code

and this one is still it trying to access something that's not mapped...

woah this is trippy

wtf happened to the background

[clear warren]

something touching your framebuffer?

[craggy nacelle]

no shit

[craggy nacelle]

i think i have to rebuild my entire toolchain yay

oh and the userspace too

yeah i think that'll be the easiest solution

because i have zero fucking scrap registers to do what i want to do in arm

i cant just msr TPIDR_EL1, sp

but if i have x18 then i can do what i wanna do

(x18 is reserved in some abis from what i could find)

[craggy nacelle]

oops

[faint knot]

kernel is overpanicking

[craggy nacelle]

yay i got it working without reserving a register

[craggy nacelle]

and yayyy it doesn't crash like this anymore

so yeah it was it using x16 which i was also using 💀

i call that fully working

[craggy nacelle]

so yeah my instincts were right

i still need to get virtio interrupts working but the system works and im happy

[craggy nacelle]

of course it couldn't be the last issue of course... not sure why this happens from time to time

but other than that seems pretty stable

[craggy nacelle]

bruh i just realized gcc 16 released like a month after this 💀

[craggy nacelle]

the temptation to write an esoteric kernel...

i want to experiment with some real mode multitasking

but tomorrow

its literally 4am

[mossy tiger]

Real mode multiprocessing seems more interesting

[craggy nacelle]

that'd be ultra cursed

i'd have to use unreal mode to be able to set up the apic tho

which is even more cursed

[craggy nacelle]

got back to work on the sdl2 port

https://github.com/ObaraEmmanuel/NES works but it runs slow at 52fps

the issue is that my scheduler has quite a bit of latency if you sleep

[sullen crag]

Good job tho

[craggy nacelle]

if i reduce the timeslice from 5ms to 1ms it does 58fps but i think i can fix it without doing that hack

but yeah i had my sdl2 port stashed for a while cause i couldn't get the emulator running

turns it was just really picky about wanting audio support

and i had to dig through the source code to remove the bail

but now it works

[craggy nacelle]

i think my terminal is fucked

ok reset fixed it

not bad

still a little bit of latency

i don't think i can do much about it, i reckon on real hardware it'll be fully smooth

[daring tendon]

are you doing hda?

[craggy nacelle]

not yet

but it would be cool to

[daring tendon]

which one are you doing?

[craggy nacelle]

no clue yet

i have nothing audio related implemented

[daring tendon]

What was that thing measuring then lmao

[craggy nacelle]

oh lmfao

sdl's dummy audio driver sample rate ig

[daring tendon]

ah

[craggy nacelle]

i didn't even notice it was reporting audio stuff

lol

[daring tendon]

lol

[craggy nacelle]

i just realized how outdated this post's first message is

bentobox is a 64-bit SMP-enabled operating system targeting x86_64.
It can do cool stuff like running bash, busybox, doomgeneric and figlet

dang i can't make it embed the github link after removing the old screenshot

oh well

slightly better but i don't have an embed anymore :(

[craggy nacelle]

tried booting it on my main rig and ps2 emulation does work if i boot with csm

but for some reason the mouse is broken and if i move it then the keyboard stops working

[craggy nacelle]

quake soon

[craggy nacelle]

it works

[craggy nacelle]

next time i work on this maybe i will do msix

and maybe nvme or virtioblk

cause polling virtio drivers aint too good 💤

[craggy nacelle]

so uh i tried running it on my laptop and my other rig and its freezing on both machines initializing the idt 💀

not sure how i'll fix this

apparently acquiring the vma's lock in vma->expand was causing a deadlock???

what the fuck man

im so confused

because i swear the crash was before mmu_initialize

whatever

i rearanged some code so i could remove that lock and it boots again

oh my i think i know why

maybe it was the vma calling itself recursively? idfk man ive been trying to get this to boot for an hour 💀

[craggy nacelle]

havent worked on this at all in the past few days

while i want to work on more virtio drivers i do want to write nvme and xhci drivers as well and they defeat the point of doing that

so yeah i may be writing an nvme driver soon or something

also why is gcc being mean to me again 😭

i literally fixed this in my latest patch

[craggy nacelle]

i fucking love debian

im trying to bootstrap aarch64 on my laptop to see if it works instead and every fucking time i run jinx init some random package will fail to download

and i have to make it download everything fucking again only for it to give me some other random package that failed to download

thanks jinx

literally unusable

i guess i wont be working on this today either

[craggy nacelle]

its my fucking internet

movistar is absolute hot garbage

[craggy nacelle]

maybe today i can actually fucking work on this?

[sullen crag]

Good boy

[craggy nacelle]

nope

[sullen crag]

Yes

[craggy nacelle]

it failed to download libcap-ng0

and now the whole jinx bootstrap will fail

thank you movistar

[sullen crag]

Lmao

Just make it work

[craggy nacelle]

i dont control this shit 😭

i cant use my mikrotik because i still havent figured out how to get iptv fully working

since the mikrotik seems to fix everything

(i tried to ssh into my other desktop and cloned my repo there and it bootstraps just fine)

and increasing the apt timeout to 3 minutes doesnt fucking fix it

[craggy nacelle]

:(

[whole falcon]

:)

[craggy nacelle]

wip c64 emulator a friend and i have been working on

[frail fog]

when ps5 emulator

[daring tendon]

ps5 emulator
looks inside, libc and gfx api hooks

[primal quest]

do you NEED any more?

ps5 is an x86_64 machine