Bananymous/banan-os
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Commit Graph
2020 Commits
Author SHA1 Message Date
Bananymous 92d10f612e Kernel: Make sure PCIeInfo is zero initialized 2026-06-25 01:42:02 +03:00
Bananymous f3f40a465b Kernel: Fix HDA amplifier step size calculation 
step size is zero based, 0 means 250 mdB
 2026-06-25 01:41:41 +03:00
Bananymous d3130884b6 Kernel: Hack TTY to work as debug console 
debug printing takes the debug lock, but TTY uses mutex for its lock
 2026-06-25 01:41:41 +03:00
Bananymous 98fd86477a Kernel: Remove allocations from path lookup 
this bumped looped /usr/bin/ls stat performance from 750k->1100k/s
 2026-05-26 19:10:16 +03:00
Bananymous 16a442f473 Kernel: Fix Thread::will_exit_because_of_signal 
I was not checking whether the signal handler has been overwritten to
ignore the signal leading to infinite busy loops :)
 2026-05-26 03:31:20 +03:00
Bananymous becfa228fe Kernel: fix signal handler block mask restoration 2026-05-26 03:31:20 +03:00
Bananymous 585e021c7f Kernel: Don't panic when stack trace leads to GPF 
if there is was a uncanonical address in stack trace we ended up in an
infinite recursive loop trying to print stack trace
 2026-05-25 02:19:56 +03:00
Bananymous 954898b14d Kernel: Fix file backed mmap syncing, my if condition was inverted 2026-05-25 02:14:04 +03:00
Bananymous d266d2ca88 Kernel: Allow network interface ioctls on interfaces 
previously it was only on the sockets
 2026-05-25 02:14:04 +03:00
Bananymous 8fccb74542 Kernel: Add indirect block cache to ext2 inode 
This reduces indirect block lookup by a lot :)
 2026-05-25 02:14:04 +03:00
Bananymous bc8ecbd6fa Kernel: Add directory entry cache for ext2 inodes 2026-05-25 02:14:04 +03:00
Bananymous 60484b286f Kernel: Fix bugs in sys_pselect 
I was not validating nfds passed from userspace. Also invalid fds are
supposed to return EBADF instead of ignoring those entries
 2026-05-25 02:14:04 +03:00
Bananymous 12158d9208 Kernel: Add OpenFileDescriptorSet::get_max_open_fd 2026-05-21 14:59:35 +03:00
Bananymous 5c94c30e1b Kernel: Use spinlocks instead of mutexes for RWLock 
All the operations are super fast, just checking or changing few
integers, there is no need for a yielding mutex :^)
 2026-05-21 02:17:34 +03:00
Bananymous 81d8ab3d79 Kernel: Remove completely unnecessary lock on file lookup 
Mount point lookup already does locking internally, there is no need for
a lock for the whole duration of the lookup :D
 2026-05-21 01:59:36 +03:00
Bananymous 6a58c716bd Kernel: Make ext2 inode cache thread safe 2026-05-21 01:56:32 +03:00
Bananymous f6679eb4b5 Kernel: Expose CPU load information under /proc/cpu/<index> 2026-05-20 19:13:25 +03:00
Bananymous ed3924722e Kernel: Remove kernel CPU load printing 
We still keep track of processor loads but the hacky printing is no
longer done in kernel space :)
 2026-05-20 19:11:27 +03:00
Bananymous 4ef03eac97 Kernel: Allow ProcRO inode fail and pass arbitrary argument to it 2026-05-20 19:06:10 +03:00
DcraftBgandBananymous f1a72cc9da Kernel: Implemented banos - a WIP C driver API 
Banos is a stable WIP C driver API that is supposed to provide a simple
interface to interact with the kernel and load the modules dynamically.
It is WIP and atm this just implements module loading with a custom
banos_install syscall. Banos will not try to substitute parts of the
kernel instead it will just expose kernel functionality via a stable
BINARY API. Meaning binaries (should) remain forward and backward
compatible on a binary level.

Banos modules work similarly to those in linux, you expose symbols via
BANOS_EXPORT which allows you to export a name + addr paired symbol.
It puts it in the .banos-export section. Drivers provide metadata about
themselves in the REQUIRED .banos-driver section. Symbols are resolved
at runtime. The kernel exposes the driver functionality via the same
.banos-export export mechanism.

Banos modules are elf RELOCATABLE files (object files) which have
partial linking (only banos symbols should remain). Modules will
eventually define dependencies, will export symbols and will allow you
to build a complex object hierarchy.

This patch adds the banos_install syscall which takes in the driver
image to install and may only be executed by super users. The API
doesn't validate already loaded modules, as thats something the
userspace MAY choose to keep track of. Multi-instance functionality
shall be implemented via driver specific behaviuor (exposed in the dev
filesystem or some other means).

Modules are supposed to allow you to alter kernel behavior and extend
it, allowing you to create filesystems, drivers, networking
modifications, schedulers, probers, and more (hopefully) whilst
remaining binary compatible with any version of the kernel (again,
hopefully).
 2026-05-20 17:52:19 +03:00
DcraftBgandBananymous 718379ce3b Kernel: moved read/write_from_user out of Process 2026-05-20 17:52:19 +03:00
Bananymous 14aa28b043 Kernel: Handle TTY ioctls on all inodes not implementing it 
This reduces debug spam while compiling software
 2026-05-20 16:57:24 +03:00
Bananymous 6045726e41 Kernel: Optimize PageTable::unmap_range on x86_64 2026-05-20 16:16:44 +03:00
Bananymous a19e6938eb Kernel: Remove TTY keyboard thread 
This was really hacky as it had no idea when the keyboard had events
and the blocking was just one millisecond sleeps :D

Now keyboard device checks if current tty is receiving input and if so
it forwards the events to the TTY.
 2026-05-20 04:17:03 +03:00
Bananymous 32206069bc Kernel: Use per cpu fast page for {Memory,File}BackedRegion 2026-05-20 02:51:48 +03:00
Bananymous 46a1903f8d Kernel: Use per cpu fast page for PMM 2026-05-20 02:46:50 +03:00
Bananymous a3ca49ff1f Kernel: Don't sync ext2 inode on read 
This is the most common operation and we don't even update any fields
during read (although we should update atime). The disk read+write is a
bit too heavy with the current cache system
 2026-05-20 02:14:40 +03:00
Bananymous 94f92d982c Kernel: Optimize PageTable address space reservation 
I only did this for the 64 bit target.
 2026-05-20 02:01:16 +03:00
Bananymous 4f5f84bb5b Kernel: Speed up mmap address space reservation by a lot 
Instead of scanning the page table for free range, we not use the
process's mapped regions to find a slot. This speeds up mmap by a lot!
 2026-05-20 01:08:08 +03:00
Bananymous 5cb5ae2dfe Kernel: Use per cpu fast pages for DiskCache 
This makes accessing disk cache a lot faster
 2026-05-20 00:17:51 +03:00
Bananymous 7704e3c5c0 Kernel: Implement per cpu fast pages 
Basically every fast page usage should be converted into this but I'll
do them one by one when they show up in profiles
 2026-05-20 00:16:56 +03:00
Bananymous 376e4b4c45 Kernel: Reduce the number of sent IPIs 
Only send an IPI when the target processors don't have pending messages.
This basically gets rid of TLB shootdowns from showing up in profiles.
Before they were taking maybe >10% kernel time :^D
 2026-05-19 23:52:38 +03:00
Bananymous 24c37e7381 Kernel: Move TLB invalidation out of standard SMPMessages 
This makes accessing TLB messages much faster as TLB flushes are very
frequent in comparison to other messages
 2026-05-19 23:51:01 +03:00
Bananymous fb9c67ab15 Kernel: Add PageTable API to invalidate full address space 2026-05-19 23:46:56 +03:00
Bananymous 1dc26d3c06 Kernel: Cleanup inode stat updating 
Inode now handles stat upates itself and calls sync function to make
updates visible on the underlying filesystem
 2026-05-19 13:00:05 +03:00
Bananymous a05fcdde8c Kernel: Move UTIME_OMIT handling to the syscall from inode 2026-05-19 11:56:12 +03:00
Bananymous deb2f52a35 Kernel: Add support for named pipes 
These only copy inodes stat when created, if you fchmod/fchown a named
pipe, the change will not be visible on the filesystem
 2026-05-19 00:15:25 +03:00
Bananymous 8224659c48 Kernel: Allow creating FIFOs in tmpfs 2026-05-19 00:05:22 +03:00
Bananymous 1922d78661 Kernel: Add support for mkfifo{,at} mkdir at 
Opening FIFOs still dont work as expected but at least you can create
them now :D
 2026-05-18 23:53:09 +03:00
Bananymous 6d1ecc2388 Kernel: Clean up file creation 2026-05-18 15:26:59 +03:00
Bananymous 5cf658c175 Kernel: Fix 2 memory pinning bugs 
If pinning a region succeeded but pushing the region to a vector failed,
we would leak the pin preventing the process from cleaning up
 2026-05-17 03:38:18 +03:00
Bananymous ef2738bfb7 Kernel: Disable devfs device add/remove logging 2026-05-17 03:38:18 +03:00
Bananymous d7865b2929 Kernel: Don't msync file backed pages that were never mapped writable 2026-05-17 03:21:08 +03:00
Bananymous 9c79971bdc LibC/Kernel: Add support for detached pthreads 2026-05-17 00:40:56 +03:00
Bananymous ff75c15ba3 LibC: Move pthread keys to TCB 
This removes all TLS relocations from libc which may become handy ;)
 2026-05-17 00:29:20 +03:00
Bananymous 9e6fa0a1ba Kernel: Add fast path for invalid address during region pin 
Before I was falling through to the write lock which does allocation,
but as the read loop already saw, specified address was not mapped.
 2026-05-17 00:29:20 +03:00
Bananymous 6e95519acc Kernel: Make TTY write lock a mutex instead of a spinlock 
The mutex could not be locked while processing ANSI DGR in VTTY
 2026-05-17 00:29:20 +03:00
Bananymous d081655913 Kernel: Add API for mutex to check if it is locked by current thread 
Also add assertion that you have interrupts enabled :^)
 2026-05-17 00:29:20 +03:00
Bananymous d528314ae3 Kernel: Make SYS_FUTEX restartable 2026-05-17 00:29:20 +03:00
Bananymous 4ef7b8e71c Kernel: AFG reset return value 2026-05-15 21:38:23 +03:00