Hornet(rewrite, do you remember?) | Operating System Development | Page 1

tardy mist Aug 31, 2023, 8:03 AM

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Hey im here on my main acc

hollow leaf Aug 31, 2023, 8:39 AM

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for what purpose do you have 166 bit gdt segments?

tight summit Aug 31, 2023, 8:44 AM

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166 bit?

tardy mist Aug 31, 2023, 8:45 AM

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tight summit 166 bit?

166 bit?????

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oops wront reply

tardy mist Aug 31, 2023, 8:46 AM

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hollow leaf for what purpose do you have 166 bit gdt segments?

166 bit?

hollow leaf Aug 31, 2023, 8:47 AM

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16bit************

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stupid keyboard repeat

tardy mist Aug 31, 2023, 8:48 AM

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what? thee is no 16 bit segment

hollow leaf Aug 31, 2023, 8:48 AM

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https://github.com/lolguy91/h0r.net/blob/main/src/kernel.cpp#L29C1-L30C80

GitHub

h0r.net/src/kernel.cpp at main · lolguy91/h0r.net

an open-source kernel. Contribute to lolguy91/h0r.net development by creating an account on GitHub.

tardy mist Aug 31, 2023, 8:48 AM

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long mode bit is set

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so its 64 bit

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wait

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I forgot

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Rewrite branch

tardy mist Aug 31, 2023, 8:49 AM

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hollow leaf https://github.com/lolguy91/h0r.net/blob/main/src/kernel.cpp#L29C1-L30C80

main branch is old

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rewrite branch is the new

hollow leaf Aug 31, 2023, 8:50 AM

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ah

tardy mist Aug 31, 2023, 9:35 AM

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here is how it looks

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hollow leaf Aug 31, 2023, 10:13 AM

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it looks nice ngl

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do you have a memory allocator?

tardy mist Aug 31, 2023, 10:14 AM

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I have a PFA, but it aint working

hollow leaf Aug 31, 2023, 10:17 AM

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eh the only hard part of it is the bitmap functions

tardy mist Aug 31, 2023, 10:44 AM

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maybe theese bitmap funcs are bad?

hollow leaf Aug 31, 2023, 10:59 AM

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I'd use a simpler aproach on set function

tardy mist Aug 31, 2023, 11:10 AM

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it works now

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it was one bitshift lol

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fuck

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I pasted the wrong thing

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so, now it works

proven horizon Aug 31, 2023, 12:23 PM

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tardy mist maybe theese bitmap funcs are bad?

That is... an interesting way to do it

tardy mist Aug 31, 2023, 12:28 PM

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proven horizon That is... an interesting way to do it

im branchless programming(kk .... kinda) 😎

proven horizon Aug 31, 2023, 12:29 PM

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Wait what exactly are you doing with the bitmap_set function

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Are you saving the bitmap[bit] except the bit you want to set into temp, and then ORing with the bit?

tardy mist Aug 31, 2023, 12:31 PM

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proven horizon Wait what exactly are you doing with the bitmap_set function

Im a monkey, I dont remember my thot process

hardy merlin Sep 2, 2023, 7:04 AM

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tardy mist maybe theese bitmap funcs are bad?

~~Well the set function cannot clear a bit~~

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Also the get function is just horribly broken

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1>>bitIndex ??

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Also clearing a bit is convoluted in your set function

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a & ~b clears all the bits in b from a

tardy mist Sep 2, 2023, 8:33 AM

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I added PCI device exploration, now it has most of the old kernel's features

barren sundial Sep 2, 2023, 11:09 AM

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Why are your commas like that

tardy mist Sep 5, 2023, 12:10 PM

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update: I got the IDT to work

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It still crashes

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but now not so quietly

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proven horizon Sep 5, 2023, 1:41 PM

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so now it crashes loudly?

tardy mist Sep 5, 2023, 1:44 PM

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no

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but its now visible

tardy mist Sep 5, 2023, 2:06 PM

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I added keyboard input but it does not really work?

hardy merlin Sep 5, 2023, 2:07 PM

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tardy mist

paging falut!

tardy mist Sep 5, 2023, 2:09 PM

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whats the problem with that?

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is page falut that much better?

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I can read ur mind lmao

proven horizon Sep 5, 2023, 2:11 PM

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paging falut ultrameme

hardy goblet Sep 5, 2023, 4:38 PM

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falut

tardy mist Sep 5, 2023, 5:17 PM

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umm, how do I make a stacktrace?

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for the err screen?

proven horizon Sep 5, 2023, 6:01 PM

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tardy mist umm, how do I make a stacktrace?

https://wiki.osdev.org/Stack_Trace

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walk the stack until you encounter 0, and print the rip values along the way

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(if you use limine, rbp is always 0 when calling the kernel entry point, hence rbp value of 0 can be considered the "end")

tardy mist Sep 6, 2023, 2:25 PM

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Hello, this is an OSDEV studying day for me, so can you please link resources related to ACPI and VMM?

hardy merlin Sep 6, 2023, 2:32 PM

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tardy mist Hello, this is an OSDEV studying day for me, so can you please link resources re...

ACPI: don't bother tbh

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VMM is not that complicated either

ebon fable Sep 6, 2023, 2:37 PM

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wdym either

barren sundial Sep 6, 2023, 2:46 PM

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for a vmm, I can recommend taking a look at the sunOS and vms vmms. There's plenty of write ups and papers online about them.

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for acpi it depends what you want to do. The tables give you some config details about the current machine, depends what you want to know. For anything beyond you're going into the deep end and will probably want something like lai/acpica. The acpi specs are freely available online, the tables are documented under the software interface iirc.

hardy merlin Sep 6, 2023, 4:03 PM

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ebon fable wdym either

that "either" was misplaced

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sorry

hardy merlin Sep 6, 2023, 4:04 PM

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barren sundial for a vmm, I can recommend taking a look at the sunOS and vms vmms. There's plen...

the gist of it is it manages the address space for the kernel and each process

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how it does that is up to the implementation

ebon fable Sep 6, 2023, 4:05 PM

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also you can make your VMM arbitrarily sophisticated

hardy merlin Sep 6, 2023, 4:06 PM

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that's the gist of it

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CoW, demand paging, swapping and compression are features implemented on top of your vmm

ebon fable Sep 6, 2023, 4:09 PM

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but at least a substantial part of their implementation is part of a VMM

worthy cradle Sep 6, 2023, 4:48 PM

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hardy merlin CoW, demand paging, swapping and compression are features implemented on top of ...

that's not on top of a vmm

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that is what a vmm is

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the "vmm = page table data structure implementation" thing is a big misnomer in hobby osdev

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it's such a tiny and trivial part of it that there are many kernels where it's not even a separate discrete component of any kind because all you're doing is setting pointers a few levels deep which you can easily do inline with the logic of the actual vmm

hardy merlin Sep 6, 2023, 4:52 PM

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worthy cradle that's not on top of a vmm

those are the VMM?

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or those are parts of the VMM

worthy cradle Sep 6, 2023, 4:53 PM

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those are commonly implemented features of vmms

hardy merlin Sep 6, 2023, 4:53 PM

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fair

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but the minimal VMM with no feature is page table management

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is it not?

worthy cradle Sep 6, 2023, 4:55 PM

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hardy merlin but the minimal VMM with no feature is page table management

u mean a page frame slapperer into page table style vmm like 1979 unix 32/v

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yea sure

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actually even that was more sophisticated since it still had swapping just of entire processes at a time

proven horizon Sep 6, 2023, 4:56 PM

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tardy mist Hello, this is an OSDEV studying day for me, so can you please link resources re...

reading this https://wiki.osdev.org/XSDT for ACPI is literally enough to get started, and surprisingly even the code to find SDT's isn't too bad or incomplete. The tables you might want for start are RSDT/XSDT, MADT and later on maybe even FADT. However please note that ACPI is not worth doing if you don't plan to do power management stuff or enabling APIC

hardy merlin Sep 6, 2023, 4:56 PM

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what do you think is the minimal VMM?

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like a vmm with no features of any kind to optimize memory usage for instance

worthy cradle Sep 6, 2023, 4:57 PM

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the only feature it then has is address space isolation

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and sparse allocation

hardy merlin Sep 6, 2023, 4:58 PM

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ah

tardy mist Sep 7, 2023, 1:45 PM

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I added a reg dump to the panic screen

proven horizon Sep 7, 2023, 3:11 PM

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the regs clobbed together without a space after the comma makes it hard to read

dawn spruce Sep 7, 2023, 4:49 PM

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FUCKING HALT!

tardy mist Sep 7, 2023, 5:13 PM

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dawn spruce FUCKING HALT!

it was @heady mulch 's idea lol

dawn spruce Sep 7, 2023, 5:17 PM

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yo chat is this rizz tho?

tardy mist Sep 7, 2023, 5:20 PM

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dawn spruce yo chat is this rizz tho?

?

tardy mist Sep 8, 2023, 2:45 PM

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do I need working ACPI for multiprocessing?

barren sundial Sep 8, 2023, 3:04 PM

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You'll need the lapic ids of the other cores to start them, which means parsing the madt. So yes, you'll need the tables, but not the other cruft.

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Not sure if you use limine, but the protocol can also start the APs for you.

tardy mist Sep 8, 2023, 3:09 PM

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I do use limine cuz its easy

proven horizon Sep 8, 2023, 3:51 PM

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barren sundial Not sure if you use limine, but the protocol can also start the APs for you.

but you still need to know the lapic ids to utilize them, no?

barren sundial Sep 8, 2023, 3:54 PM

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Limine tells you their ids in the feature response

tardy mist Sep 8, 2023, 3:54 PM

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proven horizon but you still need to know the lapic ids to utilize them, no?

no

barren sundial Sep 8, 2023, 3:54 PM

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But yes, you need them to talk to the lapics

proven horizon Sep 8, 2023, 3:54 PM

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ohh limine has everything i see

tardy mist Sep 8, 2023, 3:55 PM

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btw

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wtf is lapic

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local apic?

hardy merlin Sep 8, 2023, 3:57 PM

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tardy mist wtf is lapic

Local APIC.

tardy mist Sep 8, 2023, 3:57 PM

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oh cool

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also I added a PIT driver

hardy merlin Sep 8, 2023, 3:57 PM

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There's also the I/O APIC (IOAPIC) which allows you to communicate with legacy devices such as the keyboard and PIT

hardy merlin Sep 8, 2023, 3:57 PM

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tardy mist also I added a PIT driver

Please use the LAPIC timer for accuracy. If you can't use a different timer to calibrate it (such as HPET) or otherwise determine its frequency (as Linux does), you can fall back on the PIT to calibrate it in polled mode.

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the ioapic is only for legacy external hardware interrupts

tardy mist Sep 8, 2023, 3:58 PM

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ok, where can I read about it?

hardy merlin Sep 8, 2023, 3:58 PM

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the wiki?

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the SDM?

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whatever google tells you

tardy mist Sep 8, 2023, 4:00 PM

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hardy merlin whatever google tells you

if thats ur opinion, the optimal amount of words to say is 0

hardy merlin Sep 8, 2023, 4:00 PM

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what?

tardy mist Sep 8, 2023, 4:01 PM

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im tired of ppl saying "just google" or smth like that

hardy merlin Sep 8, 2023, 4:01 PM

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If you don't want to be constantly told to "just google" something, just ask Google what you need before asking the questions in the first place

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Will save a couple of headaches

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The "where can I read about it?" question is what google is designed to answer - linking you to webpages with the information

tardy mist Sep 8, 2023, 4:19 PM

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hardy merlin The "where can I read about it?" question is what google is designed to answer -...

oh, ye I found it instantly on google

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ty

tardy mist Sep 8, 2023, 4:39 PM

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hardy merlin Please use the LAPIC timer for accuracy. If you can't use a different timer to c...

should I remove the PIT or keep it?

hardy merlin Sep 8, 2023, 4:40 PM

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tardy mist should I remove the PIT or keep it?

I'd say remove support for it, except for calibrating the APIC in polled mode when you have nothing else.

tardy mist Sep 8, 2023, 5:20 PM

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proven horizon ohh limine has everything i see

uhh, how do I enable it? is there a non-osvev.org resource on it?

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or just about the lapic in general

proven horizon Sep 8, 2023, 5:22 PM

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tardy mist uhh, how do I enable it? is there a non-osvev.org resource on it?

what, apic?

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you write to the 11th bit of the IA32_APIC_BASE_MSR

tardy mist Sep 9, 2023, 8:28 AM

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new day, new things

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is setting the pic remap offset to 0 a bad thing?

proven horizon Sep 9, 2023, 8:54 AM

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tardy mist is setting the pic remap offset to 0 a bad thing?

set it to anything above 0x20

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i don't know what exactly happens when you set the offset at 0, but it could clash with exceptions

tardy mist Sep 9, 2023, 10:24 AM

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Im refactoring cuz the code quality is awful

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also, Im trying to make myself pay attention to warnings

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there was countless times I made stupid mistakes, that could have been easily combated by paying attention to the warnings

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they are warnings afterall

proven horizon Sep 9, 2023, 10:49 AM

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tardy mist also, Im trying to make myself pay attention to warnings

You can add -Wall -Wextra -Werror in your CFLAGS

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that way even if you don't see any error during compilation, GCC will just error out

tardy mist Sep 9, 2023, 10:50 AM

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is Weror needed?

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I would think its kinda annoying

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Ill give it a try anyways

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I keep accidentally closing vscode wtf?

tight summit Sep 9, 2023, 11:38 AM

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i would suggest keeping -Werror out in any circumstance but development

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it's bad practice to leave it in the default CFLAGS

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because compilers may add warnings in the future and your stuff will stop building

tardy mist Sep 9, 2023, 2:20 PM

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Im adding serial support

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for real HW debugging

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should I remove the port E9 trick?

proven horizon Sep 9, 2023, 2:43 PM

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tardy mist should I remove the port E9 trick?

you can leave it there for bochs

tardy mist Sep 9, 2023, 3:16 PM

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I fully integrated serial to the kernel

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now the debug log uses it

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this is how it looks:

📎 wIVb6Yb.txt

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I made a simple init system

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here is the game plan:

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the kernel will read /boot/kernel.cfg

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the init system will be baked into the kernel

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after the init system is done, it will start the login prompt

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of course the login prompt will be able to be replaced by any program

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then, the init system will initialize the enviroent, now logged in as a user

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so it will be fully customizable

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is this a good game plan?

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(for a general purpuse kernel)

tardy mist Sep 9, 2023, 4:46 PM

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anyway this is just the future

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rn, I dont have anything like that

tardy mist Sep 9, 2023, 5:03 PM

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how to write scheduler?

hardy merlin Sep 9, 2023, 5:21 PM

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tardy mist how to write scheduler?

round robin.

tardy mist Sep 9, 2023, 5:21 PM

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wut?

proven horizon Sep 9, 2023, 5:25 PM

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tardy mist wut?

A type of scheduling algorithm. https://en.m.wikipedia.org/wiki/Round-robin_scheduling

Round-robin scheduling

Round-robin (RR) is one of the algorithms employed by process and network schedulers in computing.
As the term is generally used, time slices (also known as time quanta) are assigned to each process in equal portions and in circular order, handling all processes without priority (also known as cyclic executive). Round-robin scheduling is simple,...

tardy mist Sep 9, 2023, 5:25 PM

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oh

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cool

proven horizon Sep 9, 2023, 5:26 PM

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It’s pretty easy to implement, there are some other articles you can find that will help with that

tardy mist Sep 9, 2023, 5:32 PM

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ty

hardy merlin Sep 9, 2023, 6:52 PM

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Actually task priority is usually implemented by having several queues, as is done in Windows NT

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So you only need a couple of round robin queues for your task's priority

hardy merlin Sep 9, 2023, 7:07 PM

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no I said that it has several queues, not that it uses round robin

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it might, but I can't say for sure yet

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as many queues as there are priority levels

hardy merlin Sep 9, 2023, 7:23 PM

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From top to bottom

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the highest priority tasks always go first

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if you make a CPU intensive process a "realtime" process, that core is nuked

tardy mist Sep 10, 2023, 9:10 AM

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Im doing the scheduler

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but first, I need a periodic interrupt

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Im thinking of leaving the APIC alone and using the Realtime Clock instead

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cuz acpi is hard

tardy mist Sep 10, 2023, 9:48 AM

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hmm, why isnt the XSTD there?

proven horizon Sep 10, 2023, 9:55 AM

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tardy mist hmm, why isnt the XSTD there?

QEMU only utilizes RSDT iirc

tardy mist Sep 10, 2023, 9:56 AM

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oh

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ty

proven horizon Sep 10, 2023, 9:57 AM

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wait no

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just checked and qemu does have xsdt

tardy mist Sep 10, 2023, 9:58 AM

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umm, then what the fuck?

proven horizon Sep 10, 2023, 9:58 AM

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how do you check for an XSDT?

tardy mist Sep 10, 2023, 9:58 AM

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RSDP revision is 0

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I check the revision

proven horizon Sep 10, 2023, 9:58 AM

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like this?

if (rsdp->revision == 0) {
    _xsdt_is_available = false;
    rsdt_init();
} else if (rsdp->revision >= 2) {
    _xsdt_is_available = true;
    rsdt_init();
}

tardy mist Sep 10, 2023, 9:59 AM

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no, I dont have the else if

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I have just else

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~~it says it found the RSDP on OVMF~~

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cuz I have a UEFI testenv too

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that uses OVMF

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nope, Im blind

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it crashes on the checksum test

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[INFO=]PCI Devices: 
[INFO=]VendorID: 0x8086 ,DeviceID: 0x1237
[INFO=]VendorID: 0x8086 ,DeviceID: 0x7000
[INFO=]VendorID: 0x8086 ,DeviceID: 0x7010
[INFO=]VendorID: 0x8086 ,DeviceID: 0x7113
[INFO=]VendorID: 0x1234 ,DeviceID: 0x1111
[INFO=]VendorID: 0x8086 ,DeviceID: 0x100e
[INFO=]RSDP found
[FATAL]Paging fault
[INFO=]RIP=0xffffffff800036dd ,RSP=0xffff80000e417fc0 ,CS =0x0000000000000008 ,SS =0x0000000000000010
[INFO=]RAX=0x000000000fb7d0e8 ,RBX=0x00000000000000f4 ,RCX=0x0000000000000100 ,RDX=0x00000000000003f8
[INFO=]RSI=0x000000000000000a ,RDI=0xffff80000fb7e014 ,RBP=0x0000000000000060 ,R9 =0x00000000ffffffff
[INFO=]R10=0x00000000ffffffff ,R11=0x00000000ffffffff ,R12=0x0000000000000057 ,R13=0x0000000000000000
[INFO=]R14=0x0000000000000000 ,R15=0x0000000000000000 ,ERROR_CODE=0x0000000000000000```

proven horizon Sep 10, 2023, 10:03 AM

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lolwut

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what could have you done wrong there?

tardy mist Sep 10, 2023, 10:03 AM

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    unsigned char sum = 0;

    for (uint32_t i = 0; i < table->h.Length; i++) {
        sum += ((char *)table)[i];
    }
 
    return sum == 0;
}```

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this is the checksum

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the page table is the stock limine one

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oh, I see you typing out exactly the right answer, in a complicated manner

proven horizon Sep 10, 2023, 10:07 AM

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sum += ((char *)table)[i];
converting the table to a char array and adding that might cause the issue maybe?

proven horizon Sep 10, 2023, 10:07 AM

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tardy mist oh, I see you typing out exactly the right answer, in a complicated manner

I was just trying to get my words together lol

tardy mist Sep 10, 2023, 10:08 AM

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thats why I use a hide typing plugin

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lol

proven horizon Sep 10, 2023, 10:08 AM

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you might want to retype it to uint8_t (sum is uint8_t as well)

tardy mist Sep 10, 2023, 10:08 AM

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proven horizon you might want to retype it to uint8_t (`sum` is uint8_t as well)

retype what?

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i?

proven horizon Sep 10, 2023, 10:09 AM

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sum += ((uint8_t *)rsdp_request.response->address)[i];

proven horizon Sep 10, 2023, 10:10 AM

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tardy mist retype what?

I meant cast ;-; Just in my native language we "retype" a variable haha

tardy mist Sep 10, 2023, 10:12 AM

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lol

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still bad 😦

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SCREW ACPI

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Im just gonna use the Realtime Clock as a periodic interrupt

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but what is the frequency of it?

proven horizon Sep 10, 2023, 10:16 AM

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uint8_t xsdp_checksum = 0;
uint8_t *xsdp_ptr = (uint8_t *)rsdp_request.response->address;

for (uintptr_t i = 0; i < sizeof(xsdp_t); i++) {
    xsdp_checksum += xsdp_ptr[i];
}

assert((xsdp_checksum & 0xFF) == 0);

taken from luxe

tardy mist Sep 10, 2023, 10:18 AM

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so like this:

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    uint8_t xsdp_checksum = 0;
    uint8_t *xsdp_ptr = (uint8_t *)table;

    for (uintptr_t i = 0; i < sizeof(struct XSDT); i++) {
        xsdp_checksum += xsdp_ptr[i];
    }

    return (xsdp_checksum & 0xFF) == 0;
}```

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right?

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cant belive, it works...

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like this

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but it still crashes on OVMF???????????

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what the hell?

proven horizon Sep 10, 2023, 10:31 AM

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wait I just noticed that

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you're computing the XSDT checksum

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However the checksum is written for XSDP

tardy mist Sep 10, 2023, 10:32 AM

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what is the difference?

proven horizon Sep 10, 2023, 10:33 AM

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XSDP is a Pointer, while XSDT is the Table to say it simply

tardy mist Sep 10, 2023, 10:34 AM

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the pointer points to the table?

proven horizon Sep 10, 2023, 10:34 AM

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R/XSDP contains the address to the R/XSDT table

tardy mist Sep 10, 2023, 10:34 AM

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ohh

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this good?

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    if(rsdp->Revision != 0){
        xsdt = (struct XSDT *)PHYS_TO_VIRT(rsdp->XSDTAddress);
        if(do_checksum(xsdt)){
            log_info("XSDT found");
            xsdt_entries = (xsdt->h.Length - sizeof(xsdt)) / 8;
            use_xsdt = true;
        }else{
            log_error("XSDT corrupted ,falling back to RSDT");
        }
    }else{
        xsdt = (struct XSDT *)PHYS_TO_VIRT(rsdp->RSDTAddress);
        if(do_checksum(xsdt)){
            log_info("RSDT found");
            xsdt_entries = (xsdt->h.Length - sizeof(xsdt)) / 4;
            use_xsdt = false;
        }else{
            log_CRITICAL(NULL,HN_ERR_ACPI_FAULT,"RSDT corrupted, can not fall back to anything");
        }
    }```

tardy mist Sep 10, 2023, 10:40 AM

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proven horizon I meant cast ;-; Just in my native language we "retype" a variable haha

hmm

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this name sounds a bit Hungarian to me

proven horizon Sep 10, 2023, 10:40 AM

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because it is

tardy mist Sep 10, 2023, 10:40 AM

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ok

proven horizon Sep 10, 2023, 10:42 AM

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tardy mist ``` bool use_xsdt = false; if(rsdp->Revision != 0){ xsdt = (struc...

yeah looks good to me

tardy mist Sep 10, 2023, 10:45 AM

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proven horizon yeah looks good to me

????

proven horizon Sep 10, 2023, 10:46 AM

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do you map the virtual memory before doing that?

tardy mist Sep 10, 2023, 10:46 AM

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nope

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I cant

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I mtoo stupid for that

proven horizon Sep 10, 2023, 10:47 AM

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why did you then converted the addresses to virtual ones

tardy mist Sep 10, 2023, 10:47 AM

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gtg eat lunch

proven horizon Sep 10, 2023, 10:47 AM

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xsdt = (struct XSDT *)PHYS_TO_VIRT(rsdp->RSDTAddress);

should then be

xsdt = (struct XSDT *)rsdp->RSDTAddress;

hardy merlin Sep 10, 2023, 10:48 AM

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proven horizon why did you then converted the addresses to virtual ones

if it's a 64 bit limine based kernel.. no

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the HHDM maps all of physical memory

tardy mist Sep 10, 2023, 10:53 AM

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proven horizon ```c xsdt = (struct XSDT *)PHYS_TO_VIRT(rsdp->RSDTAddress); ``` should then be `...

doesnt limine install a page table by default?

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~~btw, why did you take down the luxe gh repo?~~

proven horizon Sep 10, 2023, 10:57 AM

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hardy merlin if it's a 64 bit limine based kernel.. no

interesting... that opens up even more stuff that could be/go wrong then

proven horizon Sep 10, 2023, 10:57 AM

#

tardy mist ????

try looking what's at the rip

tardy mist Sep 10, 2023, 10:58 AM

#

why do it manually, If I have GDB?

tardy mist Sep 10, 2023, 11:00 AM

#

proven horizon try looking what's at the rip

#

fuck ACPI

#

Im using the PIT instead

tardy mist Sep 10, 2023, 12:22 PM

#

intresting

#

the serial driver is getting fucked by the isr0 handler?

tardy mist Sep 10, 2023, 1:17 PM

#

lessgoo

#

the stack is now not fucking up

#

got the periodic interrupt

#

anyways

#

part 1

#

of scheduler done

#

part 2: write a queue

#

how the fuck do I do that?

#

@proven horizon how do I write queue for a schedualer?

#

screw it

#

ill try

proven horizon Sep 10, 2023, 1:52 PM

#

tardy mist <@456226577798135808> how do I write queue for a schedualer?

an array of tasks which the scheduler goes through

#

once the scheduler reaches the bottom of the array (the last task present) it goes back and executes the first task in the array (kind of "execution in a circle" - hence the name "round robin")

tardy mist Sep 10, 2023, 2:08 PM

#

the queue is done

#

lets test it!

#

but how?

#

I guess I cant test it

#

I will just wing it

#

and hope its not the queue

#

also, I didnt expect to make it this far into the project

#

I thot I would be hell burned out after a week

#

but no

#

https://tenor.com/view/undertale-frisk-gif-5124765

Tenor

proven horizon Sep 10, 2023, 2:13 PM

#

tardy mist I guess I cant test it

create a simple function that prints something

#

and pass the function pointer as an entry point for the scheduler

tardy mist Sep 10, 2023, 2:14 PM

#

nah, I have godbolt

#

*Compiler Explorer

proven horizon Sep 10, 2023, 2:17 PM

#

what

steady merlin Sep 10, 2023, 2:43 PM

#

tardy mist update: I got the IDT to work

yoo wait

#

you are in games with gabe server too right

tardy mist Sep 10, 2023, 2:43 PM

#

steady merlin you are in games with gabe server too right

yes

#

I used to watch him

steady merlin Sep 10, 2023, 2:43 PM

#

used to

#

sad that he is not currently uploading

tardy mist Sep 10, 2023, 2:43 PM

#

buth his newest project is boring as fuck

steady merlin Sep 10, 2023, 2:44 PM

#

The animation editor?

tardy mist Sep 10, 2023, 2:44 PM

#

steady merlin sad that he is not currently uploading

and you used to be part of my community, but you left cuz my server is ded

tardy mist Sep 10, 2023, 2:44 PM

#

steady merlin The animation editor?

yes

steady merlin Sep 10, 2023, 2:44 PM

#

tardy mist and you *used to* be part of my community, but you left cuz my server is ded

huh?

#

what

tardy mist Sep 10, 2023, 2:45 PM

#

I remember, you dnt?

steady merlin Sep 10, 2023, 2:45 PM

#

ohhhh

#

your server

#

I joined to check what it was gdtdoesntwork

tardy mist Sep 10, 2023, 2:46 PM

#

lol

#

anyways

tardy mist Sep 10, 2023, 2:46 PM

#

steady merlin I joined to check what it was <:gdtdoesntwork:815518338783641600>

waht is your project here?

steady merlin Sep 10, 2023, 2:46 PM

#

tardy mist waht is your project here?

https://github.com/pricter/jeff

tardy mist Sep 10, 2023, 2:46 PM

#

jeff? what kind of name is that?

steady merlin Sep 10, 2023, 2:47 PM

#

I really dont know

#

just decided on it for some reason

tardy mist Sep 10, 2023, 2:47 PM

#

and how is it?

steady merlin Sep 10, 2023, 2:47 PM

#

I also cant answer that

steady merlin Sep 10, 2023, 2:49 PM

#

tardy mist waht is your project here?

Can you send an ss of your os?

#

I want to see

tardy mist Sep 10, 2023, 2:49 PM

#

it just a kernel

#

no GUI stuff

#

just under thre hood stuff

steady merlin Sep 10, 2023, 2:50 PM

#

Your readme says you have audio support but no gdt lmao

tardy mist Sep 10, 2023, 2:53 PM

#

steady merlin Your readme says you have audio support but no gdt lmao

REWRITE BRANCH

#

holy shit

#

fuck capslock

steady merlin Sep 10, 2023, 2:54 PM

#

wait did you resend the message

#

lmao you sent "that is old, see rewrite branch", deleted it and sent "REWRITE BRANCH"

tardy mist Sep 10, 2023, 2:55 PM

#

oh, you have msg logger

steady merlin Sep 10, 2023, 2:55 PM

#

No, I literally remember you sending a message

tardy mist Sep 10, 2023, 2:56 PM

#

oh

#

is this OK or should I do it another way?

    Registers status;
    //TODO:add more stuff
} process_t;


static bool is_active;

queue(uint64_t,process_queue);
vector_static(process_t,processes);

void sched_enable()
{
    is_active = true;
    queue_init(process_queue,uint64_t,500);
    vector_init(&processes);
}

void kill_process(uint64_t ID)
{
    processes.data[ID].status.rip = 0;
}

uint64_t create_process(void (*process_main)())
{
    Registers newregs;
    newregs.rip = (uint64_t)process_main;
    vector_push_back(&processes,{newregs});
    queue_add(process_queue,processes.len);
}```

steady merlin Sep 10, 2023, 2:59 PM

#

tardy mist is this OK or should I do it another way? ```typedef struct { Registers stat...

for kill process you literally set rip to 0

#

.... just remove from queue

tardy mist Sep 10, 2023, 3:00 PM

#

I cen only remove it if its at the front

#

so Ill do the removing in the schedule function, that Im just about to write

tardy mist Sep 10, 2023, 3:37 PM

#

steady merlin .... just remove from queue

this should work right?```void schedule(Registers *regs){
if(!is_active)
return;
memcpy(&processes.data[current_process].status,regs,sizeof(Registers));

while(true){
    if(process_queue.fullness == 0){
        log_CRITICAL(NULL,HN_ERR_UNIMPLEMENTED,"No more processes to execute, ideally, we should shut down");
    }
    uint64_t next;
    queue_remove(process_queue,next);
    process_t nextproc = vector_at(&processes,next);
    if(nextproc.status.rip != 0){
        memcpy(regs,&nextproc.status,sizeof(Registers));
        current_process = next;
        queue_add(process_queue,next);
        break;
    }
}

}```

#

ok. wtf?

proven horizon Sep 10, 2023, 3:51 PM

#

what do you mean by escaping the scheduler?

tardy mist Sep 10, 2023, 3:51 PM

#

nothing

#

It was just me being stupid

#

but...

#

#

WHAT THE HELL IS THE THING THAT I GAVE YOU????

#

god damn

#

oh, my logic is bad

tardy mist Sep 10, 2023, 4:26 PM

#

HOLY SHIT IT FUCKING WORKS

#

LESSGOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

#

lets see how it does with multiple processes

#

what

#

wft?

#

the PIT stops sending the periodic interrupt wtf

#

after we enter the first process

#

https://cdn.discordapp.com/emojis/1085874106433548318.webp?size=48&name=what&quality=lossless

proven horizon Sep 10, 2023, 4:37 PM

#

tardy mist after we enter the first process

How are you setting up the rflags?

tardy mist Sep 10, 2023, 4:37 PM

#

proven horizon How are you setting up the rflags?

wtf does rflags has to do with interrupts?

proven horizon Sep 10, 2023, 4:38 PM

#

There is an interrupt enable bit there, if it is not set interrupts are blocked

#

I made that mistake when writing my scheduler

tardy mist Sep 10, 2023, 4:39 PM

#

oh

#

well

#

I dont initialize rflags for the initial process state

#

so thats the problem

proven horizon Sep 10, 2023, 4:39 PM

#

Should usually be set up to 0x202 to set IF and the reserved (must be on) bit

proven horizon Sep 10, 2023, 4:40 PM

#

tardy mist I dont initialize rflags for the initial process state

See this article: https://en.wikipedia.org/wiki/FLAGS_register#:~:text=their smaller predecessors.-,FLAGS,-[edit]

FLAGS register

The FLAGS register is the status register that contains the current state of an x86 CPU. The size and meanings of the flag bits are architecture dependent. It usually reflects the result of arithmetic operations as well as information about restrictions placed on the CPU operation at the current time. Some of those restrictions may include preve...

tardy mist Sep 10, 2023, 4:41 PM

#

ye now it worsk

hardy merlin Sep 10, 2023, 4:41 PM

#

tardy mist after we enter the first process

did you acknowledge the interrupt

tardy mist Sep 10, 2023, 4:41 PM

#

hardy merlin did you acknowledge the interrupt

bruh we just fixed it

#

it was rflags

hardy merlin Sep 10, 2023, 4:41 PM

#

oh ok

tardy mist Sep 10, 2023, 4:43 PM

#

tysm

#

imma list the still uninitialized varibles so you can make me aware if it can cause problems

#

lol, there are none

#

the rflags was the only one

proven horizon Sep 10, 2023, 4:45 PM

#

tardy mist imma list the still uninitialized varibles so you can make me aware if it can ca...

As long as IP, SP, CS, SS, and Flags are initialized and valid values you should be good

tardy mist Sep 10, 2023, 4:48 PM

#

I think this is the point where h0r.net isnt a toy kernel anymore

#

cuz now it doesnt just initialize hardware, but it actiually uses it

#

so yeah

proven horizon Sep 10, 2023, 4:49 PM

#

tardy mist cuz now it doesnt just initialize hardware, but it actiually uses it

Yeah, from that point on you can do whatever you want with your OS really

#

Are you going to do a unix-like design or something else?

tardy mist Sep 10, 2023, 4:50 PM

#

something else

proven horizon Sep 10, 2023, 4:51 PM

#

tardy mist something else

What kind of design?

tardy mist Sep 10, 2023, 4:51 PM

#

custom

proven horizon Sep 10, 2023, 4:51 PM

#

Oh ok. how do you plan on porting software?

tardy mist Sep 10, 2023, 4:51 PM

#

Frankenstein design

proven horizon Sep 10, 2023, 4:51 PM

#

Interesting

tardy mist Sep 10, 2023, 4:51 PM

#

proven horizon Oh ok. how do you plan on porting software?

it will lean twoards unix

proven horizon Sep 10, 2023, 4:51 PM

#

Do you have a ramdisk or other filesystem?

tardy mist Sep 10, 2023, 4:52 PM

#

nope

#

I dont yet

proven horizon Sep 10, 2023, 4:52 PM

#

I would recommend doing that next, ramdisk is really easy, especially tar format. You can start to actually parse ELF files

tardy mist Sep 10, 2023, 4:53 PM

#

tar?

#

isnt that juat an archive format?

proven horizon Sep 10, 2023, 4:53 PM

#

Tape Archive Format, yes. Most people think it's for compression but that's really just an extension

#

In reality it's a way of lumping files together into one file (or tape) which is super easy to parse.

tardy mist Sep 10, 2023, 4:54 PM

#

oh cool

#

I will implemant tar first, but will customize later

proven horizon Sep 10, 2023, 4:55 PM

#

You can implement it in an hour, max. Depending on if you can already load modules using your bootloader.

#

https://wiki.osdev.org/Tar

tardy mist Sep 10, 2023, 4:55 PM

#

I use limine so I can load modules

proven horizon Sep 10, 2023, 4:55 PM

#

Yeah, once you can do that tar is super easy

tardy mist Sep 10, 2023, 4:55 PM

#

(main branch is old )

#

Im updating the TODO

#

what is MSI?

proven horizon Sep 10, 2023, 5:05 PM

#

tardy mist what is MSI?

MSI/MSI-X = Message signaled interrupts
https://wiki.osdev.org/PCI#Message_Signaled_Interrupts:~:text=skip complicated ACPI.-,Message Signaled Interrupts,-Message Signaled Interrupts

#

It's something to do with PCI I guess

tardy mist Sep 10, 2023, 5:05 PM

#

ohh

tardy mist Sep 10, 2023, 5:40 PM

#

nice

#

got modules loading

#

well, mint is right, limine is really easy

steady merlin Sep 11, 2023, 1:00 AM

#

proven horizon As long as IP, SP, CS, SS, and Flags are initialized and valid values you should...

How do I know what these variables are in my kernel

#

I just copied the gdt from lyre because I thought it was a one time thing that I dont need to waste time on

#

Rip and rsp I understand

#

Do ip and ss also have to be set or can I just set rip and rsp?

proven horizon Sep 11, 2023, 2:25 AM

#

steady merlin How do I know what these variables are in my kernel

They are registers. IP is instruction pointer, it’s the same thing as RIP. SS is stack segment, which should be set to the data segment offset in your GDT

proven horizon Sep 11, 2023, 4:00 AM

#

steady merlin How do I know what these variables are in my kernel

i can safely say that the rip should point at the entry point of a program

tardy mist Sep 11, 2023, 12:12 PM

#

im adding hornet.conf

#

so it can be configured

#

but first, Im making a library

#

basically just kernel utils

#

so its easy to make kernels if ur new

#

also for me in the future

#

is there anything I missed?

#

proven horizon Sep 11, 2023, 12:36 PM

#

tardy mist

prob <limits.h>

#

im not sure if that's included in stdtypes or not though

tardy mist Sep 11, 2023, 1:44 PM

#

lessgoo

#

the lib is ready

#

Imma make a new post about it

#

okay, made new post

#

back to h0r.net

#

tar

#

first, I need an initramfs to load

tardy mist Sep 11, 2023, 3:48 PM

#

@proven horizon how can I make a tar file with the simple tar not USTAR?

proven horizon Sep 11, 2023, 3:49 PM

#

man tar

tardy mist Sep 11, 2023, 3:49 PM

#

oh

#

ok

#

actually tar --help did the job

tardy mist Sep 11, 2023, 4:15 PM

#

hmm

#

so if there is only one file

#

it crashes at the end

#

cuz there is no more at the end

#

HOW THE FUCK AM I SOPPOSED TO KNOW THAT IT ENDS

#

oh

#

file size

#

right

#

lessgooo

#

#

it works

#

@proven horizon Im done with tar

#

it works

#

now I have to figure out wtf happened to my pid 1

#

it now spams fsr

#

hmm, but the only thing I did is I removed 2 create process calls

#

hmm

#

WTF?

#

ooh

#

fixed

proven horizon Sep 11, 2023, 4:38 PM

#

tardy mist <@456226577798135808> Im done with tar

Congrats

#

You're making good progress

#

Are you going to do userland stuff next or something else?

tardy mist Sep 11, 2023, 4:39 PM

#

Im thinking of yaml and NBT parsers

#

but yaml looks hard

#

and I never looked at the NBT spec

proven horizon Sep 11, 2023, 4:41 PM

#

tardy mist Im thinking of yaml and NBT parsers

For your kernel config files?

tardy mist Sep 11, 2023, 4:41 PM

#

yaml for config , NBT for registery hives

proven horizon Sep 11, 2023, 4:43 PM

#

tardy mist but yaml looks hard

Why not just do INI or some other simple key value structure, you can parse it easier

tardy mist Sep 11, 2023, 4:43 PM

#

proven horizon Why not just do INI or some other simple key value structure, you can parse it e...

cuz its flexable

#

maybe Ill try json

proven horizon Sep 11, 2023, 4:43 PM

#

I would say for configs for a kernel, INI is probably better but JSON also works

tardy mist Sep 11, 2023, 4:49 PM

#

screw it, Ill do INI intead

tardy mist Sep 11, 2023, 5:06 PM

#

ini parser almost done 😉

tardy mist Sep 11, 2023, 5:31 PM

#

ini parser is done

#

but I have to go

steady merlin Sep 12, 2023, 12:04 PM

#

tardy mist ini parser is done

You were making a config file for your kernel right

#

Also add these configs to kernel args in limine

#

And allow the kernel args to override the config files

#

So when I forget a password or something I can just change the kernel to some password change mode in kernel args in limine and change the password

#

It's just an example

#

You can do other things

tardy mist Sep 12, 2023, 12:07 PM

#

ok ok

tardy mist Sep 12, 2023, 12:23 PM

#

the ini parser does not work

proven horizon Sep 12, 2023, 12:25 PM

#

tardy mist the ini parser does not work

Link the github I can take a look if you want

tardy mist Sep 12, 2023, 12:28 PM

#

proven horizon Link the github I can take a look if you want

https://github.com/lolguy91/libkrnl-essentials/commit/733935eab158f66c0876cce7c457d365acedfb1a

GitHub

ini parser · lolguy91/libkrnl-essentials@733935e

#

also this is in libkrnl so we want to move to https://discord.com/channels/440442961147199490/1150791486921777243

tardy mist Sep 12, 2023, 12:54 PM

#

so vfs

#

how the HELL do I do that?

proven horizon Sep 12, 2023, 12:58 PM

#

tardy mist how the HELL do I do that?

However you want. Here are some design models for a VFS https://wiki.osdev.org/VFS#:~:text=Database file systems.-,VFS Models,-Indexed (*%2DDOS/NT

tardy mist Sep 12, 2023, 1:09 PM

#

actually, Imma just upgrade the tty, cuz its really not usable

#

(Imagine mint jumping in and saying "Just use flanterm")

tight summit Sep 12, 2023, 1:17 PM

#

Just use flanterm

tardy mist Sep 12, 2023, 1:17 PM

#

tight summit Just use flanterm

and you did it looooooooooooool

proven horizon Sep 12, 2023, 1:22 PM

#

tardy mist and you did it looooooooooooool

Flanterm actually is pretty good, I use it. Supports all of the escape codes and all of that which makes it quite easy

tardy mist Sep 12, 2023, 1:22 PM

#

oh

proven horizon Sep 12, 2023, 1:22 PM

#

I would recommend it

tardy mist Sep 12, 2023, 1:23 PM

#

just that the owner loves to self advertize

#

that was the meme

proven horizon Sep 12, 2023, 1:23 PM

#

This server does advertise Limine a lot I guess

tardy mist Sep 12, 2023, 1:25 PM

#

tight summit Just use flanterm

hey btw, have you heard of relying on mint too much syndrome?

#

like Im afraid Im gonna catch it by putting flanterm into h0r.net

#

screw it, flanterm time

proven horizon Sep 12, 2023, 1:28 PM

#

You could also try SSFN (https://wiki.osdev.org/Scalable_Screen_Font) but Flanterm is easier to set up

#

The main benefit of SSFN is it supports unicode so foreign languages display correctly

tardy mist Sep 12, 2023, 1:31 PM

#

proven horizon The main benefit of SSFN is it supports unicode so foreign languages display cor...

so, should I do it?

proven horizon Sep 12, 2023, 1:32 PM

#

tardy mist so, should I do it?

Sure

tardy mist Sep 12, 2023, 1:42 PM

#

wtf is a framebuffer's pitch?

#

uhhh

#

how do I do this?

#

wait, I can just copy from halihacker

#

he uses this same config

tight summit Sep 12, 2023, 1:47 PM

#

tardy mist hey btw, have you heard of `relying on mint too much syndrome`?

sorry

#

that sounds terrible

tight summit Sep 12, 2023, 1:48 PM

#

tardy mist uhhh

i would assume just flanterm_write(&character, 1);

tardy mist Sep 12, 2023, 1:49 PM

#

tight summit i would assume just `flanterm_write(&character, 1);`

oh, ty

#

is there a way to clear the sreen?

#

is this how flanterm sopposed to look?

#

just asking

tight summit Sep 12, 2023, 1:57 PM

#

yes

tardy mist Sep 12, 2023, 1:57 PM

#

cuz it looks great actually

tight summit Sep 12, 2023, 1:57 PM

#

you can change the font if you want, or colour palette, etc

tardy mist Sep 12, 2023, 1:58 PM

#

does it scroll?

tight summit Sep 12, 2023, 1:58 PM

#

yeah of course

#

hell, it runs like

#

80% of what the average Linux terminal emulator runs

#

including nano, vim, nyancat, etc

#

and it is quite performant

#

without weird hacks

tardy mist Sep 12, 2023, 1:59 PM

#

unicode?

tight summit Sep 12, 2023, 2:00 PM

#

it supports a subset of unicode

#

it understands unicode but most characters will result in tofu if they are not part of codepage 437

tardy mist Sep 12, 2023, 2:03 PM

#

oh hell no

#

I hate projects that dont have the proper gitignore

tight summit Sep 12, 2023, 2:05 PM

#

hm?

#

flanterm does not have a gitignore because it doesn't have a build system

#

limine-barebones has proper gitignores

tardy mist Sep 12, 2023, 2:06 PM

#

oh ok

tight summit Sep 12, 2023, 2:06 PM

#

if you dropped the flanterm C files in a repo with proper gitignores and build systems, it won't be an issue

#

well i assume your editor shows it that way because you cloned the flanterm repo into your repo

tardy mist Sep 12, 2023, 2:06 PM

#

I submoduled it

tight summit Sep 12, 2023, 2:07 PM

#

alright, same thing

#

though git adding in your base repo shouldn't affect the flanterm directory

#

even if it shows like that in your editor

#

one way to fix this is by doing out of tree builds

#

but that is beyond the scope of limine-barebones

proven horizon Sep 12, 2023, 2:08 PM

#

tight summit yeah of course

I've had serious issues with flanterm's scrolling in QEMU though

tight summit Sep 12, 2023, 2:09 PM

#

which issues?

proven horizon Sep 12, 2023, 2:09 PM

#

after the screen fills up, you could literally see each line getting pushed upwards which slowed down the entire thing

#

but it does work just fine on real hardware so I just disabled flanterm when running in QEMU

tight summit Sep 12, 2023, 2:16 PM

#

proven horizon after the screen fills up, you could literally see each line getting pushed upwa...

idk, it's quite fast for me in qemu, like virtually faster than anywhere i tried it on real hardware

#

so i am not sure what's going on there

#

if you want to double check, go get the lai test image and see if it's slow there as well

tardy mist Sep 12, 2023, 2:20 PM

#

my keyboard driver seems to be bad

#

cuz, I press a on my custom prompt and nothing happens, digging deeperthis is how a keypress looks like(the right number is the output of KEY_IS_PRESS)

#

this is my code:https://github.com/lolguy91/h0r.net/blob/rewrite/src/drivers/hid/keyboard.c

GitHub

h0r.net/src/drivers/hid/keyboard.c at rewrite · lolguy91/h0r.net

an open-source kernel. Contribute to lolguy91/h0r.net development by creating an account on GitHub.

#

lol

#

I forgot about this custom banner

#

I think its just KEY_IS_PRESS

#

really?

#

the relase KEYBOARD_RELASE value was wrong

#

now I need a sleep func to make typing not be impossible

#

I have the PIT sleep func now

#

@tight summit how do I do backspace with flanterm?

tight summit Sep 12, 2023, 2:54 PM

#

\b

tardy mist Sep 12, 2023, 2:54 PM

#

oh

#

theres a char

tight summit Sep 12, 2023, 2:55 PM

#

if you want to clear as well, then \b \b

#

that's the standard way to do that

tardy mist Sep 12, 2023, 2:55 PM

#

so 2 backspaces in a row clears screen?

tight summit Sep 12, 2023, 2:55 PM

#

space in the middle, and no

#

i mean to clear a character

#

like pressing backspace in a terminal

#

if you want to clear the screen there is another escape sequence for that

tardy mist Sep 12, 2023, 2:56 PM

#

oh

tight summit Sep 12, 2023, 2:56 PM

#

\e[2J\e[H

tardy mist Sep 12, 2023, 2:57 PM

#

what the FUCK?

tight summit Sep 12, 2023, 2:57 PM

#

hm?

hardy merlin Sep 12, 2023, 3:01 PM

#

tardy mist what the FUCK?

Is this your first contact with these?

tardy mist Sep 12, 2023, 3:01 PM

#

yes

hardy merlin Sep 12, 2023, 3:02 PM

#

tbh I had fun implementing them in my terminal emulator

tardy mist Sep 12, 2023, 3:30 PM

#

I got a little experimental kernel shell running

#

here are all features

#

#

this interactive env will help me make the VFS

hardy merlin Sep 12, 2023, 3:53 PM

#

tardy mist

I'd load an executable from a module first and then use that

tardy mist Sep 12, 2023, 3:54 PM

#

hardy merlin I'd load an executable from a module first and then use that

this is temporary

#

and I alredy hade the code for it

#

anyways

#

lets actually make a proper VFS

tardy mist Sep 12, 2023, 4:16 PM

#

shis should be good right?

#

thats it for now

#

Imma call it a day

tardy mist Sep 13, 2023, 3:16 PM

#

Im taking a break from h0r.net

#

I have been developing for 2 weeks straight

#

also fuck paging

#

Imma just act like its 2001

hardy merlin Sep 13, 2023, 3:37 PM

#

tardy mist also fuck paging

not that difficult

tight summit Sep 13, 2023, 3:37 PM

#

we had paging in 2001

#

btw

tardy mist Sep 13, 2023, 3:38 PM

#

tight summit we had paging in 2001

when was paging implemented then?

tight summit Sep 13, 2023, 3:38 PM

#

like

#

the 70s or so?

#

ask will he'll give you a 5000 word essay about it

ebon fable Sep 13, 2023, 3:39 PM

#

tardy mist when was paging implemented then?

Depends, you can probably go back to the 60s.

#

But basically every 32-bit PC ever made has it.

ebon fable Sep 13, 2023, 3:46 PM

#

tardy mist Imma just act like its 2001

By 2001, I'm pretty sure 99.9% of people moved on from 8088 and 286 PCs.
The 386, the first x86 processor to support paging, was released in 1985, and was first used in commercially available PCs in 1987.
In the early 90s, 8088s and 286s became increasingly rare.
Windows dropped support for 8088 with the release of Windows 3.1 in 1992, and Windows NT always required at least a 386.
Windows for Workgroups 3.11, introduced in 1993, and every subsequent PC version of Windows required a 386 or higher and made heavy use of paging.

#

Anyways

#

Paging makes a lot of things easier, not harder.

tardy mist Sep 13, 2023, 3:50 PM

#

maybe I should het off the Poncho drugs and read something actually useful

tardy mist Sep 13, 2023, 3:55 PM

#

hardy merlin not that difficult

okay. any resources? so I can actually understand it?

hardy merlin Sep 13, 2023, 3:59 PM

#

tardy mist okay. any resources? so I can actually understand it?

osdev wiki, the intel sdm...

#

the page tables simply map each page of the virtual address space to physical pages... or don't (if the present bit isn't set)

#

also https://media.discordapp.net/attachments/577560777049767957/942934642028339220/paging.png

#

but instead of pml4, pdpt, pd and pt (names used by the SDM) you can use pml4, pml3, pml2 and pml1 so it is a little less mind numbing

proven horizon Sep 15, 2023, 8:16 AM

#

@tardy mist what the fuck is this log

tardy mist Sep 15, 2023, 10:57 AM

#

proven horizon <@936986830543413310> what the fuck is this log

ini test

#

"testicles" starts with test yk

proven horizon Sep 15, 2023, 11:24 AM

#

🤣🤣🤣🤣🤣

tardy mist Sep 15, 2023, 11:39 AM

#

I implemented a get_file func

proven horizon Sep 15, 2023, 12:42 PM

#

by the way how fast you implement stuff I'm starting to get worried about the code quality tbh

tardy mist Sep 15, 2023, 1:04 PM

#

proven horizon by the way how fast you implement stuff I'm starting to get worried about the co...

you can see for yourself

#

its on the github

proven horizon Sep 15, 2023, 1:30 PM

#

it's... inconsistent

#

i hope that's the right word

tardy mist Sep 15, 2023, 1:30 PM

#

wdym?

proven horizon Sep 15, 2023, 1:32 PM

#

as in: some functions named in snake_case, some combine capital letters (snake_CASE), and then some functions are PascalCase

#

also the coding style varies from file to file:
one has

if(cond){
  expr
}

another one

if (cond) {
  expr
}

and

if (cond)
{
  expr
}

tardy mist Sep 15, 2023, 1:34 PM

#

wtf?

#

that is just nit picking

proven horizon Sep 15, 2023, 1:35 PM

#

well it still is something that might raise questions (especially if the code really is yours, and not just a frankenstein of different projects)

tardy mist Sep 15, 2023, 1:36 PM

#

what is wrong with being inconcistant?

proven horizon Sep 15, 2023, 1:37 PM

#

nothing in terms of functioning - it all gets compiled to the same instructions regardless

#

the thing is code readability: it's a lot easier to maintain a large repository with a clean, set coding style

#

and don't take this the wrong way, it's going to help you (and others interested in contributing, like me) get oriented in the code easily

tardy mist Sep 15, 2023, 1:45 PM

#

but how does the if case one help?

#

that one specifically

#

is stupid

proven horizon Sep 15, 2023, 1:48 PM

#

I mean code style is very subjective (as to where do you like to place braces etc.), in the if() case I meant mostly consistency

tardy mist Sep 15, 2023, 2:12 PM

#

proven horizon I mean code style is very subjective (as to where do you like to place braces et...

how do I finish this?(tar header to vfs node conversion)

proven horizon Sep 15, 2023, 2:14 PM

#

idk, never got to vfs stuff in the first place and i haven't studied your impl enough

#

but I'd say that tar_get_file_header should actually read the file, and get the file's header (and not the metadata)

tardy mist Sep 15, 2023, 4:25 PM

#

the

#

VFS

#

is

#

complete

#

Im not gonna hook it up yet

#

ill do it tomorroe

#

its enugh work alredy

#

so

#

https://www.youtube.com/watch?v=4eM7J52Yp1U

YouTube

Palpe

Deltarune Chapter 2 OST: 45 - Until Next Time

Listen to all soundtrack: https://materia.to/deltarune2ID
Deltarune is another game made by Toby Fox who also made Undertale

Get the game here
https://www.deltarune.com/
https://store.steampowered.com/app/1671210/DELTARUNE/

Get the soundtrack on Toby Fox bandcamp
https://tobyfox.bandcamp.com/

▶ Play video

proven horizon Sep 15, 2023, 6:05 PM

#

becauseeee I want to

tardy mist Sep 22, 2023, 12:42 PM

#

I got a simple VFS working, but Im still debugging

tardy mist Sep 22, 2023, 1:18 PM

#

anyways I committed the changes

#

I hate debugging

#

does anyone know some background noise or music that makes me not want k*ll myself while debugging?

proven horizon Sep 22, 2023, 1:44 PM

#

tardy mist does anyone know some background noise or music that makes me not want k*ll myse...

https://www.youtube.com/watch?v=Axeqsb5Q4pY

#

https://github.com/lolguy91/h0r.net/blob/1e4b8678219d676b154ad114bd7beebd2ffe8f3f/src/VFS/vfs.c#L54C80-L54C80 what is this supposed to mean? @tardy mist

tardy mist Sep 22, 2023, 1:49 PM

#

proven horizon <https://github.com/lolguy91/h0r.net/blob/1e4b8678219d676b154ad114bd7beebd2ffe8f...

it looks for the next part of the path in the folder

proven horizon Sep 22, 2023, 1:50 PM

#

like "if this string is the same as the other string, do this"?

tardy mist Sep 22, 2023, 1:50 PM

#

yes

proven horizon Sep 22, 2023, 1:51 PM

#

that would need to be if (!strcmp(...)) then

tardy mist Sep 22, 2023, 1:52 PM

#

why?

proven horizon Sep 22, 2023, 1:52 PM

#

wait no, you're using your own implementation

tardy mist Sep 22, 2023, 1:52 PM

#

yeah

proven horizon Sep 22, 2023, 1:55 PM

#

a really weird implementation tbh but yeah

#

what are you debugging? i've got some time so i could also take a look at it

tardy mist Sep 22, 2023, 1:57 PM

#

Im noöt adebugging anything rn but the tar parser cuz it stops at the bin folder fsr

#

its inb vendor/libkrnl-essentials/parsing/tar.c

#

(the lib is made by me)

tardy mist Sep 22, 2023, 4:12 PM

#

proven horizon what are you debugging? i've got some time so i could also take a look at it

so what did you find? did you even look at it? did you lie?

proven horizon Sep 22, 2023, 4:14 PM

#

i didn't really find anything wrong

tardy mist Sep 22, 2023, 4:15 PM

#

oh ok

proven horizon Sep 22, 2023, 4:15 PM

#

just curious, is this supposed to align the size to 512 bytes?

if (size % 512)
            _header += 512;

#

(it's in the parse_tar function)

tardy mist Sep 22, 2023, 4:18 PM

#

yes

hardy merlin Sep 22, 2023, 4:18 PM

#

(_header + 511) % 512

proven horizon Sep 22, 2023, 4:18 PM

#

that would not align it properly however

#

if you had a size of, say 513, adding 512 would result in 1025, which again isn't aligned

hollow leaf Sep 22, 2023, 4:19 PM

#

tardy mist yes

_header += 512 - (size % 512)

#

if you want to align to next 512

tardy mist Sep 22, 2023, 4:20 PM

#

ty

#

the problem is that the parser only sees the first header

proven horizon Sep 22, 2023, 4:28 PM

#

if (!((struct ext_dir*)folder_contents->ext)->files[i].flags)
{
  break;
}

this is failing

#

soo there's something wrong with setting the flags for files when they are detected

#

also the cd command is broken

Snimek_obrazovky_2023-09-22_v_18.35.38.png

tardy mist Sep 22, 2023, 4:36 PM

#

ye, ik, but idk what

#

um wtf?

tardy mist Sep 22, 2023, 4:41 PM

#

proven horizon also the `cd` command is broken

what passed?

#

in the pic?

proven horizon Sep 22, 2023, 5:10 PM

#

proven horizon ```c if (!((struct ext_dir*)folder_contents->ext)->files[i].flags) { break; } ...

it was just a quick sanity check for this

tardy mist Sep 22, 2023, 5:16 PM

#

oh ok

tardy mist Sep 23, 2023, 1:51 PM

#

hmmmmm

#

I added event system

#

its not very important rn

#

but I want my kernel to be event based

#

event BASED lol

fallow pilot Sep 23, 2023, 6:38 PM

#

Subscribers? Isn't that like, YouTube???

hardy merlin Sep 23, 2023, 6:39 PM

#

fallow pilot Subscribers? Isn't that like, YouTube???

Well on YouTube you subscribe to a channel and get notifications everytime they post

#

which is an event

#

so... I guess yeah?!

fallow pilot Sep 23, 2023, 6:39 PM

#

Yeah I know lol

dawn spruce Sep 23, 2023, 8:03 PM

#

fallow pilot Yeah I know lol

don't forget to subscribe, hit the bell and smash that like button, it helps the channel a lot, thank you and let's continue with the video

fallow pilot Sep 23, 2023, 8:04 PM

#

dawn spruce don't forget to subscribe, hit the bell and smash that like button, it helps the...

you forgot to put the "This is so sad" at the start

dawn spruce Sep 23, 2023, 8:05 PM

#

forgot to put the "gone wrong" after that

fallow pilot Sep 23, 2023, 8:05 PM

#

yes

tardy mist Sep 24, 2023, 8:01 AM

#

fallow pilot Subscribers? Isn't that like, YouTube???

its basically youtube yeah, but the subscribers are function pointers no account IDs

fallow pilot Sep 24, 2023, 8:04 AM

#

Oh alright

uneven fox Sep 24, 2023, 10:16 AM

#

forgot to put the OMG COPS CALLED flobsh

old sapphire Sep 24, 2023, 1:58 PM

#

and if it was 2017, also a clickbait thumbnail and a title with the "so i did (something not even related to the video)..." (the three dots at the end are important)

#

but in 2023 it's just some words are written with caps, also if you can put an arrow and a question mark, then do it

dawn spruce Sep 25, 2023, 7:08 PM

#

old sapphire but in 2023 it's just some words are written with caps, also if you can put an a...

"DON'T CALL AMONG US AT 3 AM... (gone wrong)"

tardy mist Oct 1, 2023, 1:59 PM

#

I hate debugging

#

that stupid tar parser isnt working right fsr

#

why???

#

why????????????????????????????????????????????????????????

#

what the hell??

#

it was the pointer arith

#

me = stupid

#

very stupid

hollow leaf Oct 1, 2023, 2:29 PM

#

gdb

tardy mist Oct 1, 2023, 2:30 PM

#

hollow leaf gdb

Does the visual studio code plugin native debugger cout as gdb? if yes, then Im alredy using it

hollow leaf Oct 1, 2023, 2:30 PM

#

good job

#

follow the spec to the word

#

and it should work properly

fallow pilot Oct 1, 2023, 2:31 PM

#

at least it didnt take you 3 weeks to debug 😢

#

oh you didnt fix it yet

#

alright

tardy mist Oct 1, 2023, 2:31 PM

#

I fixed it

fallow pilot Oct 1, 2023, 2:31 PM

#

oh nice

tardy mist Oct 1, 2023, 2:31 PM

#

but there is another bug

#

*2 more bugs

#

first

#

why is this true when path is bin/cum and filename is bin/?

#

strncmp(path, (char*)hdr->filename, strlen(path)) && !strcmp(path,(char*)hdr->filename

hollow leaf Oct 1, 2023, 2:35 PM

#

check for strncmp to be 0

tardy mist Oct 1, 2023, 2:35 PM

#

my impl doesnt follow the spec

#

it just returns true if they match and false if they dont

hollow leaf Oct 1, 2023, 2:37 PM

#

tardy mist `strncmp(path, (char*)hdr->filename, strlen(path)) && !strcmp(path,(char*)hdr->f...

that strncmp's return value should be checked to be zero

#

if it is then it's a full match

tardy mist Oct 1, 2023, 2:38 PM

#

hollow leaf that strncmp's return value should be checked to be zero

bruv

proven horizon Oct 1, 2023, 2:39 PM

#

hollow leaf check for strncmp to be 0

his implementation does not follow the specs though

hollow leaf Oct 1, 2023, 2:39 PM

#

I thought the tar isn't to spec

#

mb

fallow pilot Oct 1, 2023, 2:39 PM

#

tardy mist bruv

shouldnt it be i < n in your while loop?

#

😅

#

that might be it

hollow leaf Oct 1, 2023, 2:40 PM

#

probably :)

#

it looks nice everywhere else

fallow pilot Oct 1, 2023, 2:40 PM

#

yeah

tardy mist Oct 1, 2023, 2:40 PM

#

that is the error yeah

#

2nd new bug: mistery kernel panic

proven horizon Oct 1, 2023, 2:41 PM

#

@tardy mist do you support APIC yet?

tardy mist Oct 1, 2023, 2:41 PM

#

I am clueless

tardy mist Oct 1, 2023, 2:41 PM

#

proven horizon <@936986830543413310> do you support APIC yet?

I gave up on ACPI

hollow leaf Oct 1, 2023, 2:41 PM

#

tardy mist I am clueless

check the qemu logs for interrupts

#

and use addr2line

#

on the offending address

proven horizon Oct 1, 2023, 2:42 PM

#

tardy mist I gave up on ACPI

not ACPI, I mean APIC (replacement for the legacy 8259 PIC)

tardy mist Oct 1, 2023, 2:42 PM

#

proven horizon not ACPI, I mean APIC (replacement for the legacy 8259 PIC)

but that needs ACPI, so no

proven horizon Oct 1, 2023, 2:43 PM

#

oh wait right I forgot nooo

tardy mist Oct 1, 2023, 2:43 PM

#

or is there a PIO method too?

fallow pilot Oct 1, 2023, 2:43 PM

#

The stupid ioapic, I am implementing it right now and it SUCKS

proven horizon Oct 1, 2023, 2:44 PM

#

parsing the MADT isn't hard though, shouldn't take you more than 1-2 hours to read the spec and implement it

proven horizon Oct 1, 2023, 2:44 PM

#

tardy mist but that needs ACPI, so no

I think it's a misconception that ACPI for the APIC is really difficult. Unless you do the AML stuff, which APIC doesn't involve.

#

MADT is just some simple structs and minimal parsing work

#

The spec is your best friend here even if it seems intimidating at first

tardy mist Oct 1, 2023, 2:45 PM

#

proven horizon I think it's a misconception that ACPI for the APIC is really difficult. Unless ...

try to do that without understanding paging(its enabled by default on limine)

hardy merlin Oct 1, 2023, 2:46 PM

#

tardy mist or is there a PIO method too?

No

#

Actually the local APIC is accessible via an MSR

#

or you are talking about the IOAPIC?

#

but that just involves going through the ACPI headers.. which is NOT complicated

#

it's just a struct

proven horizon Oct 1, 2023, 2:46 PM

#

tardy mist try to do that without understanding paging(its enabled by default on limine)

I don’t understand, what does paging have to do with the MADT?

hardy merlin Oct 1, 2023, 2:47 PM

#

running AML is complicated (for whatever reason)

proven horizon Oct 1, 2023, 2:47 PM

#

proven horizon The spec is your best friend here even if it seems intimidating at first

It's even doable with the one page on the osdev wiki

hardy merlin Oct 1, 2023, 2:47 PM

#

tardy mist try to do that without understanding paging(its enabled by default on limine)

add the HHDM offset to each physical address

#

boom

proven horizon Oct 1, 2023, 2:47 PM

#

literally the MADT parsing is just a switch-case inside of a for loop

tardy mist Oct 1, 2023, 2:47 PM

#

proven horizon I don’t understand, what does paging have to do with the MADT?

I get random page faluts when tryin to parse the fucking tables

proven horizon Oct 1, 2023, 2:47 PM

#

tardy mist I get random page faluts when tryin to parse the fucking tables

Yeah you need to map it

#

You can’t access a random pointer you get from an ACPI table without ensuring it is mapped

tardy mist Oct 1, 2023, 2:48 PM

#

does limine not map the tables for you?

#

rsdp is mapped if you request it

#

but IG nothing else is

proven horizon Oct 1, 2023, 2:50 PM

#

tardy mist rsdp is mapped if you request it

I believe it maps the whole HHDM which includes the tables. But it is mapped to a high virtual address so you need to add the offset to it

tardy mist Oct 1, 2023, 2:51 PM

#

proven horizon I believe it maps the whole HHDM which includes the tables. But it is mapped to ...

offset? the one in my link.ld?

#

this:

    /* We wanna be placed in the topmost 2GiB of the address space, for optimisations */
    /* and because that is what the Limine spec mandates. */
    /* Any address in this region will do, but often 0xffffffff80000000 is chosen as */
    /* that is the beginning of the region. */
    . = 0xffffffff80000000;

proven horizon Oct 1, 2023, 2:52 PM

#

tardy mist offset? the one in my link.ld?

No that’s the kernel offset. You get the HHDM offset from Limine requests

fallow pilot Oct 1, 2023, 2:52 PM

#

proven horizon literally the MADT parsing is just a switch-case inside of a for loop

you are spot on

tardy mist Oct 1, 2023, 2:54 PM

#

proven horizon No that’s the kernel offset. You get the HHDM offset from Limine requests

that is when you realised, you are stupid (litterally me rn)

tardy mist Oct 1, 2023, 3:20 PM

#

wierd, it still loops

#

it loops until it runs out of stack

#

it works now

#

listing directory contents is still wierd tho

#

#

it does not like empty folders fsr

#

I need to add cat...

#

why does it think everything is a directory?

proven horizon Oct 1, 2023, 3:45 PM

#

probably wrong flags set?

tardy mist Oct 1, 2023, 3:46 PM

#

proven horizon probably wrong flags set?

nope, gdb'd it, and it initializes it like a directory

proven horizon Oct 1, 2023, 3:47 PM

#

aaand does cat check for the flag correctly?

tardy mist Oct 1, 2023, 3:49 PM

#

yes it does

#

{
    struct node* fileinq = get_file(path); 
    if (fileinq == NULL) return false;
    return (fileinq->flags & FLAGS_ISDIR) >> 1;
}```

fallow pilot Oct 3, 2023, 11:23 PM

#

Any updates?

proven horizon Oct 4, 2023, 6:56 AM

#

tardy mist it looks for the next part of the path in the folder

how you input when ps/2 keyboard isnt realizated

proven horizon Oct 4, 2023, 7:04 AM

#

proven horizon how you input when ps/2 keyboard isnt realizated

ps/2 kbd driver is there though

proven horizon Oct 4, 2023, 7:05 AM

#

proven horizon ps/2 kbd driver is there though

in readme

proven horizon Oct 4, 2023, 7:06 AM

#

proven horizon in readme

https://github.com/lolguy91/h0r.net/blob/rewrite/src/drivers/hid/keyboard.c

GitHub

h0r.net/src/drivers/hid/keyboard.c at rewrite · lolguy91/h0r.net

an open-source kernel. Contribute to lolguy91/h0r.net development by creating an account on GitHub.

#

readmes tend to be outdated

#

uhoj

#

uhok*

hardy merlin Oct 4, 2023, 7:20 AM

#

Will it beat linux though?

proven horizon Oct 4, 2023, 7:21 AM

#

hardy merlin Will it beat linux though?

i think to beat linux its must have more features

#

hornet isnt complete >:D

proven horizon Oct 4, 2023, 12:09 PM

#

proven horizon i think to beat linux its must have more features

no hobby OS will realistically come as close as Linux's amount of features

#

but you can come close to (or even beat) Linux in terms of security, functionality and speed

tardy mist Oct 4, 2023, 3:47 PM

#

proven horizon but you can come close to (or even beat) Linux in terms of security, functionali...

are they mutually exclusive? thinkong

proven horizon Oct 4, 2023, 3:48 PM

#

what do you mean by that exactly?

tardy mist Oct 4, 2023, 3:51 PM

#

I want it all

proven horizon Oct 4, 2023, 3:52 PM

#

well that is definitely doable

#

(doable does not mean easy though)

tardy mist Oct 4, 2023, 3:53 PM

#

Imma focus on functionality first cuz that sounds the easiest

proven horizon Oct 4, 2023, 3:54 PM

#

and the most important imho

tardy mist Oct 4, 2023, 4:18 PM

#

why is there no XSDT?

fallow pilot Oct 4, 2023, 4:18 PM

#

Qemu?

tardy mist Oct 4, 2023, 4:19 PM

#

its seabios

#

it does exist on TianoCore

fallow pilot Oct 4, 2023, 4:28 PM

#

Idk then

tardy mist Oct 4, 2023, 4:32 PM

#

lessgo, I just had to replaxe the checksum with a signature chack and now it works

#

nooooooooooo

#

trying to access one of the tables page faluts

#

@tight summit does limine not (page) map the ACPI tables for you?

#

IK it does RSDP and RSDT/XSDT

#

but what about the other ones?

tight summit Oct 4, 2023, 4:37 PM

#

tardy mist <@379163868364275712> does limine not (page) map the ACPI tables for you?

depends

#

it doesn't say anything about the ACPI tables, but it always maps the first 4GiB where usually most tables are, and it also maps all other memory map entries, which usually also includes ACPI entries

tardy mist Oct 4, 2023, 4:38 PM

#

https://tenor.com/view/god-damn-it-rouxls-kaard-rouxls-kaard-damnit-gif-23440867

Tenor

tight summit Oct 4, 2023, 4:38 PM

#

if the address is <4GiB and you get a page fault, it isn't Limine's fault, assuming you're using Limine's page tables

tardy mist Oct 4, 2023, 4:39 PM

#

tight summit if the address is <4GiB and you get a page fault, it isn't Limine's fault, assum...

I add the HHDM offset to the address

tight summit Oct 4, 2023, 4:39 PM

#

i mean physically

tardy mist Oct 4, 2023, 4:41 PM

#

hmm. faluting address(cr2) is 16????

#

is this address good?

tight summit Oct 4, 2023, 4:50 PM

#

that looks non canonical

tardy mist Oct 4, 2023, 4:51 PM

#

wdym?

tight summit Oct 4, 2023, 4:51 PM

#

it's an invalid address

tardy mist Oct 4, 2023, 4:52 PM

#

oooh

proven horizon Oct 5, 2023, 6:59 PM

#

Lyre

#

it's my number one choice when I don't understand something

tight summit Oct 5, 2023, 10:53 PM

#

just you wait for the rewrite :p

proven horizon Oct 6, 2023, 5:56 AM

#

i have fucking fat fingers

#

fixed it lol

tardy mist Oct 6, 2023, 1:24 PM

#

I have moved development of the VFS into a test enviroment(standard userspace ""application"") for convenience

#

almost works..

hardy merlin Oct 6, 2023, 1:26 PM

#

tardy mist I have moved development of the VFS into a test enviroment(standard userspace ""...

tip: use AddressSanitizer while in user space

#

that, or Valgrind

tardy mist Oct 6, 2023, 1:39 PM

#

hardy merlin tip: use AddressSanitizer while in user space

what is AddressSanitizer

hardy merlin Oct 6, 2023, 1:47 PM

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tardy mist what is AddressSanitizer

sanitizes addresses

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basically ensures you don't have any memory bugs

tardy mist Oct 6, 2023, 1:57 PM

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nice

tardy mist Oct 6, 2023, 4:15 PM

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I got mounting ro work

tardy mist Oct 6, 2023, 5:18 PM

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finally

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the VFS works

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steady merlin Oct 7, 2023, 11:47 AM

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hello

tardy mist Oct 7, 2023, 12:26 PM

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hellohacker

proven horizon Oct 8, 2023, 7:58 AM

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With a VFS working you might also want to implement a real FS on top of it

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so you can test your OS (including FS stuff/file loading later on) on real hardware

proven horizon Oct 9, 2023, 2:47 PM

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@tardy mist Are you still looking to implement ACPI one day?

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I might write something and send you a PR if you want

tardy mist Oct 9, 2023, 3:51 PM

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proven horizon I might write something and send you a PR if you want

that would be lovely actually

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jusm make sure to add a lot of comments, so I can learn from it

proven horizon Oct 9, 2023, 3:55 PM

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tardy mist jusm make sure to add a lot of comments, so I can learn from it

sure, np

proven horizon Oct 9, 2023, 5:46 PM

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@tardy mist https://github.com/lolguy91/h0r.net/pull/17 Ready to merge now

GitHub

Implement basic ACPI support by schkwve · Pull Request #17 · lolguy...

This PR enabled quick and easy SDT lookup thanks to find_sdt().
RSDT and XSDT is automatically found and used if present;
In the find_sdt() function, the return value is guaranteed to point to eith...

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So with this you should easily be able to write code for HPET, MADT and friends

tardy mist Oct 10, 2023, 12:43 PM

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finally got the VFS to work in the kernel

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it still uses the test drive

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but Ill write a tar driver soon

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maybe even mount some ACPI info to /sys/acpi

tardy mist Oct 10, 2023, 1:30 PM

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proven horizon <@936986830543413310> https://github.com/lolguy91/h0r.net/pull/17 Ready to merge...

btw, you noted the log_fatal bug

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turns out, I just forgot to initialize my bitmap font renderer 🤦🏼‍♂️

proven horizon Oct 10, 2023, 2:00 PM

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tardy mist turns out, I just forgot to initialize my bitmap font renderer 🤦🏼‍♂️

Haha, might want to add a simple check if it is initialized to prevent this bug😁

tardy mist Oct 10, 2023, 2:04 PM

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I just learned how to use unions in C for type specific stuff

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how did my head not explode trying to debug my VFS without this?

tardy mist Oct 10, 2023, 2:20 PM

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finally got cat to work

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this thing shows all current shell features

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(note: this is the kernel test shell)

tardy mist Oct 10, 2023, 3:41 PM

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bruh, tar vfs driver going well...

tardy mist Oct 11, 2023, 12:38 PM

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ok, now its only **semi-**broken

proven horizon Oct 11, 2023, 12:39 PM

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i like how everything you name refers to dicks, balls and cum

tardy mist Oct 11, 2023, 12:39 PM

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Sex humor

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Im in that age group

proven horizon Oct 11, 2023, 12:41 PM

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12-13?

tardy mist Oct 11, 2023, 12:41 PM

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13-16

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maybe thats not it

proven horizon Oct 11, 2023, 12:42 PM

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seems legit

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it's kinda cool to see such young people make an OS tbh

tardy mist Oct 11, 2023, 12:44 PM

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am I just stupid or do you really need a fully developed frontal cortex for wrapping your head around the MMU?

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because there is always smth I cant explain

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maybe its Limine, and If I was to make my own mappings it would be better

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but Im too lazy to do that

proven horizon Oct 11, 2023, 1:04 PM

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well it's just a translation unit

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(along other things of course)

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so you have the kernel loaded in memory at address, say, 0x123456, but it makes it seem like the kernel is actually loaded at 0xfffff8000 something

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also it ensures that other processes cannot see the memory of other processes

tardy mist Oct 11, 2023, 2:18 PM

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fucking

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finally

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it works

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LESSGOO

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969th message

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now

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I have to fix up the VMM

steady merlin Oct 11, 2023, 3:33 PM

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tardy mist

Did you implement sleep() to work with scheduler?

tardy mist Oct 11, 2023, 3:34 PM

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steady merlin Did you implement sleep() to work with scheduler?

I didnt, it just does, but I only have one thread so it wont soon

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I have a barebones scheduler

steady merlin Oct 11, 2023, 3:35 PM

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tardy mist I have a barebones scheduler

better make it now

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than do it after everything on top of it is complete

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then you would have to change a lot

steady merlin Oct 11, 2023, 3:36 PM

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tardy mist I didnt, it just does, but I only have one thread so it wont soon

it just does?

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like rescheduling if sleep?

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and adding to sleeping list and that?

tardy mist Oct 11, 2023, 3:58 PM

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steady merlin it just does?

I said, it is imlemented in a way, that does not break when I just have one thread

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for multiple thereads, its a bit moer komplikated

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but I know how

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cuz my sleep is just a spinlock with a milisecond counter

proven horizon Oct 11, 2023, 4:01 PM

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tardy mist cuz my sleep is just a spinlock with a milisecond counter

what

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why the spinlock?

tardy mist Oct 11, 2023, 4:02 PM

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proven horizon what

the counter counts down, and the spinlock spins until it reaches zero

proven horizon Oct 11, 2023, 5:24 PM

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oh you have a global counter?

hardy goblet Oct 11, 2023, 7:55 PM

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tardy mist cuz my sleep is just a spinlock with a milisecond counter

You could try and use interrupts

steady merlin Oct 12, 2023, 4:51 AM

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Wait why are u the op, isnt lolguy making this os

hardy goblet Oct 12, 2023, 4:56 AM

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steady merlin Wait why are u the op, isnt lolguy making this os

theyre the same i think (alt account?)

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well you are using a spinlock and millisecond counter, whatever

steady merlin Oct 12, 2023, 4:57 AM

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Hotnet os conspiracy

dawn spruce Oct 12, 2023, 5:01 AM

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isn't irq 1 keyboard tho

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until you're talking about IRQ 0 (PIT)

proven horizon Oct 12, 2023, 7:51 AM

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but why the lock?

proven horizon Oct 12, 2023, 1:30 PM

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i was hoping for a more... descriptive answer

steady merlin Oct 12, 2023, 1:31 PM

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proven horizon i was hoping for a more... descriptive answer

his answer reminds of a twitter post of french prime minister

"We do not want war" and in the reply of the tweet he writes
"However, ..."

tardy mist Oct 12, 2023, 1:46 PM

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proven horizon i was hoping for a more... descriptive answer

Poncho tutorial

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I know its horrible and wastes cycles, but it works

proven horizon Oct 12, 2023, 1:59 PM

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tardy mist Poncho tutorial

the sleep itself isn't really bad as a starting point

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but i'm not seeing the spinlock either

tardy mist Oct 12, 2023, 2:01 PM

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the while loop

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isnt it technically a spinlock

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__asm__ volatile("movq %0, %%cr3\r\n" : "=r"(nextproc.pml4) :);

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~~is this good?~~

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why does it not work

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is the asm the issue?

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oops wrong channel lmao

proven horizon Oct 12, 2023, 2:08 PM

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tardy mist isnt it technically a spinlock

a spinlock protects a resource from being used by another process (or processor) by testing if it is already set (and setting it if it isn't) at one time

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so no

tardy mist Oct 13, 2023, 4:21 PM

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I didnt work on hornet today

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Because I went to an open day, and won a high end USB pendrive on an IT knowlage contest

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and what I did with it?

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well, I noticed that it is much faster than my HDD

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so I made it my boot drive

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Im still using the HDD, but soon, the portable GeekUSB™ will be done!

tardy mist Oct 14, 2023, 8:21 AM

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This is how the system looks

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its all on a USB drive

tardy mist Oct 15, 2023, 12:36 PM

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I redone the error screen again, now its using flanterm

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so I got rid of that 2nd font renderer

proven horizon Oct 15, 2023, 12:51 PM

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looks good👍

proven horizon Oct 18, 2023, 4:02 PM

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any updates?

tardy mist Oct 19, 2023, 4:41 PM

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proven horizon any updates?

nope lmao

proven horizon Oct 20, 2023, 10:36 AM

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proven horizon any updates?

i eat updates

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it was delicious

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wait what

proven horizon Oct 20, 2023, 11:07 AM

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isn't that my vmm code?

tardy mist Oct 20, 2023, 11:23 AM

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proven horizon wait what

how did you not fucking notice?

hardy merlin Oct 20, 2023, 11:27 AM

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tardy mist how did you not fucking notice?

maybe he didn't look before?

tardy mist Oct 20, 2023, 11:28 AM

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okay

tardy mist Oct 20, 2023, 11:28 AM

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proven horizon any updates?

the reason for no update is TSS

proven horizon Oct 20, 2023, 12:44 PM

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tardy mist the reason for no update is TSS

working on SMP?

tardy mist Oct 20, 2023, 12:51 PM

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yep

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wait

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nvm

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im just stupid

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Im not doing anyting rn

tardy mist Oct 21, 2023, 8:00 AM

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Sorry for the ded-looking project

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I just run out of motivation quick

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I wil get back to it later

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I promise

tardy mist Oct 27, 2023, 2:57 PM

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this is a normal non- ‫ message ‫

tardy mist Oct 28, 2023, 9:05 AM

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Im diving head-first into ELF parsing!!

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rn, the hornet test playground is just inspecting itself

tardy mist Oct 28, 2023, 10:10 AM

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some progress:

hardy merlin Oct 28, 2023, 10:17 AM

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tardy mist Im diving head-first into ELF parsing!!

what are you trying to do ?

#Hornet(rewrite, do you remember?)