Commit Graph

1207 Commits

Author SHA1 Message Date
Bananymous ed325b4a45 Kernel: Fix typo in userspace address validation 2024-08-09 16:52:57 +03:00
Bananymous 1c67b5e812 Kernel: Fix wait syscall to report status of exited children 2024-08-09 16:52:35 +03:00
Bananymous b6c964c444 Kernel: Rewrite pipes
Pipes have now a fixed size buffer and pipe clone and close is working
again.
2024-08-09 16:50:19 +03:00
Bananymous 44f0ec601f Kernel: Expose /proc/meminfo and fix /proc/<pid>/meminfo
Thread was unconditionally calling <stack>->size() without validating
that the stack actually exists
2024-08-09 15:58:56 +03:00
Bananymous 2a659a9d03 BuildSystem: Fix enable sse definition
__enable_sse was never actually defined for any targets. This also adds
__arch definition for libc (so `utsname` works).
2024-08-09 15:52:42 +03:00
Bananymous 7e7c3a1bb3 Kernel: VirtualTTY now handles dark colors
I have seemingly forgot to add these before
2024-08-09 15:52:42 +03:00
Bananymous 7afdfb150f LibC: Rewrite sigprocmask in terms of pthread_sigmask
Also don't fail SYS_SIGPROCMASK if how is invalid and set is NULL.
2024-08-07 17:01:35 +03:00
Bananymous 0a7c316ffb Kernel: Fix race condition when blocking threads
If thread was blocked, but had not reached block queue, you might
already get an unblock request which would fail on an assertion.

If blocked thread was load balanced to another processor and unblocked
simultaneously, there was a race condition.
2024-08-05 20:14:13 +03:00
Bananymous e72424e01a Kernel: Implement ANSI CSI M and fix ANSI CSI L
There are not maybe not correct, but work much better than the old ones
2024-08-05 15:53:01 +03:00
Bananymous a578527012 Kernel/LibC: Implement ioctl(TIOCGWINSZ)
This allows ncurses to get the window size!
2024-08-01 22:56:26 +03:00
Bananymous af78a2d080 Kernel: Implement ANSI CSI L for TTY
vim seems to be using this, so I decided its needed
2024-08-01 22:08:46 +03:00
Bananymous 840000d02b Kernel: Make sure null signal is not send with kill() 2024-08-01 21:41:54 +03:00
Bananymous 9ea4c777ad Kernel: TTY now handles ESC key presses
This allows exiting vim :D
2024-08-01 21:41:11 +03:00
Bananymous a33b63d066 Kernel/LibC: Implement alarm() and setitimer()
This makes vim able to start!
2024-08-01 21:09:56 +03:00
Bananymous da3b30cd94 Kernel: Add macro to dump all syscalls and their return values 2024-08-01 18:21:49 +03:00
Bananymous 4599e1dec5 Kernel: Make schedler not crash when unblocking active thread
This was happening when sending signals to processes that were currently
running.
2024-08-01 18:21:49 +03:00
Bananymous 6de350ce9d Kernel/LibC: Cleanup, fix and implement a lot of signal code
This patch implements sigsets and some of their usages
2024-08-01 17:01:18 +03:00
Bananymous 838d31fa41 Kernel: Implement more POSIX compliant open() and openat() syscalls 2024-08-01 15:35:02 +03:00
Bananymous 7c3b6307d9 Kernel: Cleanup USB initialization code 2024-07-31 23:23:44 +03:00
Bananymous f0be4f86a6 LibC/Kernel: Implement access 2024-07-30 11:51:07 +03:00
Bananymous e5bb843059 LibC/Kernel: Implement ttyname 2024-07-30 11:41:18 +03:00
Bananymous 681d8327f5 LibC/Kernel: Cleanup termios code
This is still not correct, but much better than it used to be
2024-07-30 11:10:43 +03:00
Bananymous 9bc02c81f8 Kernel: Map DMA and PCI MMIO as uncached 2024-07-30 11:10:08 +03:00
Bananymous bb1738db8c Kernel: Make thread unblocking O(1)
This is still bit broken. VirtualBox seems to freeze sometimes, but I
could not recreate this on qemu (with and without kvm) or real hardware.
2024-07-24 00:31:01 +03:00
Bananymous 9548c592a3 Kernel: Always print basic info about xHCI controller
Its nice to see that the controller is getting initalized
2024-07-23 09:09:08 +03:00
Bananymous cda0276d39 Kernel: Force PCI irq line usage when not using APIC
afaik PIC does not support MSI
2024-07-23 09:08:00 +03:00
Bananymous 539afb329a Kernel: All processors use LAPIC timer when running with APIC
This makes scheduler preemption much cleaner as bsb does not have to
send smp messages to notify other processes about timer interrupt.

Also PIT percision is now "full" 0.8 us instead of 1 ms that I was using
before.
2024-07-23 02:28:52 +03:00
Bananymous 3e0150f847 Kernel: Pressing F1 now toggles rendering of CPU loads to the terminal
This can be nice for seeing the performance and problems on the load
balancing algorithm.
2024-07-22 00:43:13 +03:00
Bananymous f8261c60c0 Kernel: Rewrite the whole scheduler and re-architecture SMP handling
Change Semaphore -> ThreadBlocker
  This was not a semaphore, I just named it one because I didn't know
  what semaphore was. I have meant to change this sooner, but it was in
  no way urgent :D

Implement SMP events. Processors can now be sent SMP events through
IPIs. SMP events can be sent either to a single processor or broadcasted
to every processor.

PageTable::{map_page,map_range,unmap_page,unmap_range}() now send SMP
event to invalidate TLB caches for the changed pages.

Scheduler no longer uses a global run queue. Each processor has its own
scheduler that keeps track of the load on the processor. Once every
second schedulers do load balancing. Schedulers have no access to other
processors' schedulers, they just see approximate loads. If scheduler
decides that it has too much load, it will send a thread to another
processor through a SMP event.

Schedulers are currently run using the timer interrupt on BSB. This
should be not the case, and each processor should use its LAPIC timer
for interrupts. There is no reason to broadcast SMP event to all
processors when BSB gets timer interrupt.

Old scheduler only achieved 20% idle load on qemu. That was probably a
very inefficient implementation. This new scheduler seems to average
around 1% idle load. This is much closer to what I would expect. On my
own laptop idle load seems to be only around 0.5% on each processor.
2024-07-22 00:33:50 +03:00
Bananymous 9f90eeab05 Kernel: Fix stack pointer OOB check
i686 does not push the stack pointer on interrupt when no CPL change
happens.
2024-07-22 00:27:08 +03:00
Bananymous 1ee37cb671 Kernel: Make sure stack is aligned on interrupts for i686 target
I just realized that only x86_64 aligns stack pointer when interrupt is
triggered.
2024-07-22 00:10:42 +03:00
Bananymous 8fe798de6d Kernel: Make PIT counter atomic with spinlock 2024-07-21 18:56:41 +03:00
Bananymous 86b6714777 Kernel: Add command line option to boot without smp 2024-07-21 17:40:57 +03:00
Bananymous 77b5e6d44a Kernel: Make ATABus use BAN::Atomic<> instead of gcc builtin atomics 2024-07-21 17:39:26 +03:00
Bananymous ffe73165f9 Kernel: Fix PCI typo serail -> serial 2024-07-21 17:36:29 +03:00
Bananymous 96c7e9e29d Kernel: Cleanup VirtualRange code
Virtual range does not need to look into the page table for mapped
physcial pages. It can (and should) just keep track of them itself.
2024-07-21 17:35:07 +03:00
Bananymous 02051ed60f Kernel: Move keyboard kernel panic to the general input device
This will allow command to work without requiring it per keyboard driver
2024-07-21 17:33:38 +03:00
Bananymous f49689caac Kernel: Implement API for sending IPIs for only one processor
Also move the spin wait to check for pending IPI sends to the start of
ipi sending function. There is no need to wait for IPI send succeeding
right after it. It is enough to make sure there are not multiple IPIs
being sent at the same time.
2024-07-21 17:30:59 +03:00
Bananymous 974b9b992d Kernel: Fix process exiting infinite loop
If process was exiting and had a process waiting for it and that waiting
process got interrupted, the exiting process could never exit.
2024-07-18 21:40:44 +03:00
Bananymous 4b917390ac Kernel: Fix sse state saving
This was broken when I added SMP support. This patch makes sse kind of
dumb as it is saved and restored on every interrupt, but now it at least
works properly... I'll have to look into how sse can get optimized
nicely with SMP. Simple way would be pinning each thread to a specific
processor and doing pretty much what I had before, but sse thread saved
in processor rather than static global.
2024-07-16 23:15:11 +03:00
Bananymous 7a0fb9a57f Kernel: Fix TTY scroll clearing first and/or last characters from line 2024-07-16 22:49:49 +03:00
Bananymous 58fcd2b2fe Kernel: Fix multi-interface USB device initialization 2024-07-16 22:29:18 +03:00
Bananymous e30952efee Kernel: Implement key repeating for USB keyboard
USB keyboards don't send repeating keys automatically, so it has to be
emulated in software.
2024-07-16 11:54:57 +03:00
Bananymous 1337758660 Kernel: Make USB HID interfaces configure all endpoints 2024-07-16 00:23:26 +03:00
Bananymous 339e8a7910 Kernel: Fix USB keyboard state updating with variable reports 2024-07-16 00:03:00 +03:00
Bananymous a60b460701 Kernel: Update USB HID code to support multiple top-level collections
This allows me to use my laptops own keyboard!
2024-07-16 00:01:53 +03:00
Bananymous a5cb4057f9 Kernel: Implement unified input files for device hot-plugging support
/dev/keyboard and /dev/mouse can be read for events from any attached
keyboard or mouse respectively. This makes device hot-plugging support
pretty much automatic for TTY, GUI, and whatever takes input.
2024-07-15 22:11:15 +03:00
Bananymous 9d7f97ccd5 Kernel: Implement DevFileSystem::remove_device
This function cleanly removes the devices from the whole filesystem.

USB devices are now removed from the filesystem as soon as they are
destroyed.
2024-07-15 22:10:42 +03:00
Bananymous 0578d41500 Kernel: Implement WriteCombining memory
This makes framebuffer much faster on real hardware
2024-07-15 22:09:09 +03:00
Bananymous 42c3fa24f0 Kernel: Add support for HID Report ID and parsing all collections
Only the first top-level collection is used for the device, but that
seems to generally be what keyboard and mouse use for input.
2024-07-15 15:51:07 +03:00