Bananymous/banan-os
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47d85eb2817c23f00a3fdeb278e11ed7f4c1d81a
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1850 Commits
Author SHA1 Message Date
Bananymous 47d85eb281 Kernel: Pass the actual vaddr range to reserve pages 2026-04-04 23:48:43 +03:00
Bananymous 3f55be638d Kernel: Allow reserve_free_page{,s} to fail 
Apparently I was asserting here before :D
 2026-04-04 23:48:43 +03:00
Bananymous 664c824bc0 Kernel: Keep fast page always reserved 
There was a bug where 32 bit target's reserve_free_page was allocating
the fast page address
 2026-04-04 23:48:43 +03:00
Bananymous 675c215e6a Kernel: Add CoW support to MemoryBackedRegion 
This speeds up fork by A LOT. Forking WindowServer took ~90 ms before
this and now its ~5 ms.
 2026-04-03 01:54:59 +03:00
Bananymous c09bca56f9 Kernel: Add fast write perm remove to page tables 2026-04-03 01:54:22 +03:00
Bananymous 7d8f7753d5 Kernel: Cleanup and fix page tables and better TLB shootdown 2026-04-03 01:53:30 +03:00
Bananymous f77aa65dc5 Kernel: Cleanup accessing userspace memory 
Instead of doing page validiation and loading manually we just do simple
memcpy and handle the possible page faults
 2026-04-02 16:36:33 +03:00
Bananymous 9589b5984d Kernel: Move USERSPACE_END to lower half 
This allows calculating distance to USERSPACE_END from lower half
address
 2026-04-02 16:34:47 +03:00
Bananymous 5647cf24d2 Kernel: Implement volume control to audio drivers 2026-04-02 15:14:27 +03:00
Bananymous 68506a789a Kernel: Add support for volume control keys 2026-04-02 05:02:05 +03:00
Bananymous 5c20d5e291 Kernel: HDAudio hide unusable pins and cleanup path finding 2026-03-24 01:16:47 +02:00
Bananymous f89d690716 Kernel: HDAudio only probe codecs in STATESTS 
This removes unnecessary probing that lead to timeouts. Also cap codec
address at 14 instead of 15. My test laptop was duplicating codec 0 at
address 15 leading to duplicate devices.
 2026-03-24 00:49:47 +02:00
Bananymous dedeebbfbe Kernel: Use ByteRingBuffer with audio buffers 2026-03-23 22:12:40 +02:00
Bananymous ccb4d13a82 Kernel: Compile EventFD file 2026-03-23 18:25:18 +02:00
Bananymous d18a0de879 Kernel: Fix mprotext for partial regions 
if mprotected are did not contain the start of the region, mprotect
would exit early
 2026-03-17 23:33:05 +02:00
Bananymous cdc45935b5 Kernel: Don't allow chdir into non-directories 2026-03-17 22:57:17 +02:00
Bananymous c1a424a635 Kernel: Implement linux's eventfd 2026-03-17 20:24:06 +02:00
Bananymous 1d07d8e08e LibC/DynamicLoader: Add support for dynamically loaded TLS 
Previously I failed to dlopen if any of the objects contained TLS
section
 2026-03-17 20:01:51 +02:00
Bananymous eeef945c25 Kernel: Make tty use the new byte ring buffer 2026-02-28 14:53:15 +02:00
Bananymous a602753bda Kernel: Add front/back/pop_back to ByteRingBuffer 2026-02-28 14:51:35 +02:00
Bananymous 812ae77cd7 Kernel: Make TCP sockets use the new ring buffer 
Also fix race condition that sometimes prevented window updates not
being sent after zero window effectively hanging the whole socket
 2026-02-28 14:22:08 +02:00
Bananymous 8b8af1a9d9 Kernel: Rewrite pipes using the new ring buffer 2026-02-28 14:20:52 +02:00
Bananymous 493b5cb9b1 Kernel: Implement byte ring buffer 
This maps the ring twice right next to each other so we don't have to
care about wrapping around when doing memcpy or accessing the data
 2026-02-28 14:18:23 +02:00
Bananymous 1ecd7cc2fe Kernel: Allow protocol specific socket options 
I had forgot to remove this condition on the syscall
 2026-02-27 19:20:22 +02:00
Bananymous 5c38832456 Kernel: use wake_with_waketime in epoll 
We already have the wake time so there is no reason to calculate the
timeout
 2026-02-27 19:14:35 +02:00
Bananymous d16f07a547 Kernel: Print thread id when writing to /dev/debug 2026-02-27 19:12:35 +02:00
Bananymous 54acb05131 Kernel: Don't print "./" prefix with debug functions 2026-02-27 19:10:51 +02:00
Bananymous 9ddf19f605 Kernel: Optimize networking code 
Remove buffering from network layer and rework loopback interface.
loopback now has a separate recieve thread to allow concurrent sends and
prevent deadlocks
 2026-02-27 19:08:08 +02:00
Bananymous ff378e4538 Kernel: Cleanup and optimize TCP 
We now only send enough data to fill other ends window, not past that.
Previous logic had a but that allowed sending too much data leading to
retransmissions.

When the target sends zero window and later updates window size,
immediately retransmit non-acknowledged bytes.

Don't validate packets through listeing socket twice. The actual socket
will already verify the checksum so the listening socket does not have
to.
 2026-02-24 16:20:23 +02:00
Bananymous 2ea0a24795 Kernel: Fix TCP SYN option propagation 
Listening socket now forwards TCP options to the newly created socket
 2026-02-23 23:00:47 +02:00
Bananymous acf28d8170 Kernel: Use ring buffers for TCP windows 
This speeds up TCP networkign a ton as it doesnt have to do unnecessary
memmoves for each send/receive
 2026-02-23 21:10:13 +02:00
Bananymous 666a7bb826 Kernel: Rework TCP window size reporting 
We now report actually available window size when sending packets. If
the available window size grows significantly we send an ACK to reflect
this to the remote.
 2026-02-23 21:10:13 +02:00
Bananymous 1ac20251cf Kernel: Fix TCP stack crash on retransmission 2026-02-23 17:48:16 +02:00
Bananymous 9445332499 Kernel: Remove unnecessary interface lookup 
This prevented connecting to local sockets listening on INADDR_ANY
 2026-02-23 16:06:48 +02:00
Bananymous 8edd63d115 Kernel: Cleanup {set,get}sockopt debug prints 2026-02-23 16:06:48 +02:00
Bananymous a0211d88e7 Kernel: Don't include TCP header in MSS 2026-02-08 19:44:30 +02:00
Bananymous e216fc7798 Kernel: Fix port allocation endianness 2026-02-08 19:43:08 +02:00
Bananymous c648ea12f2 Kernel: Cleanup and fix UNIX sockets 
EPOLLOUT is now sent to the correct socket and buffer is now a ring
buffer to avoid unnecessary memmove on every packet
 2026-02-08 19:38:28 +02:00
Bananymous 2e59373a1e Kernel: Fix non blocking sockets blocking :D 2026-02-08 19:33:28 +02:00
Bananymous a51a81b6cd Kernel: Move {set,get}sockopt to sockets 
Sockets can now actually implement socket options :D
 2026-02-08 19:27:16 +02:00
Bananymous aef536fff3 Kernel: Fix SharedMemoryObject cloning on deleted keys 2026-01-25 01:42:17 +02:00
Bananymous d472e1ac0e Kernel: Remove obsolete FIXMEs and null pointer checks 2026-01-24 22:42:18 +02:00
Bananymous 120c08fb75 Kernel: Implement fcntl based locks 2026-01-24 22:38:34 +02:00
Bananymous ba6229b92d Kernel: Fix TCP accept bind address 
I was accidentally binding the new socket to the target address instead
of the listening socket's address
 2026-01-24 00:33:05 +02:00
Bananymous a08b9b82a6 Kernel: Fix yield stack pointer value 
Stack pointer was pointing to value of return address on return instead
of past it. This did not affect anything as ig Processor::yield() didn't
use stack after calling the trampoline
 2026-01-19 00:47:00 +02:00
Bananymous 5d62fa3f10 Kernel: Clenup stacktrace printing on exception 
Start from current ip and bp. This removes kernel call stack to debug
printing function from the stack trace
 2026-01-16 16:31:35 +02:00
Bananymous d3df00f0ba Kernel: Make Processor structure default to zero 
This moves processor info to bss instead of having it in data section
 2026-01-16 16:24:47 +02:00
Bananymous 34e84f8b07 Kernel: Reduce the number of TLB invalidations 
Invalidations are not done if mapping or unmapping previously unmapped
page. TLB invalidate IPIs are now ignored if they don't affect the
currently mapped address space
 2026-01-16 16:22:29 +02:00
Bananymous 1143dc3cae Kernel: Rework syscall memory validation and locking 
Process's memory regions are now behind an rwlock instead of using the
full process lock. This allows most pointer validations to not block as
write operations to memory regions are rare.

Thread's userspace stack is now part of process's memory regions. This
simplifies code that explicitly looped over threads to see if the
accessed address was inside a thread's stack.

Only drawback of this is that MemoryRegions don't support guard pages,
so userspace stackoverflow will be handeled as cleanly as it was prior
to this.

This patch also fixes some unnecessary locking of the process lock and
moves locking to the internal helper functions instead of asserting that
the lock is held. Also we now make sure loaded ELF regions are in sorted
order as we previously expected.
 2026-01-16 16:09:38 +02:00
Bananymous 0299d4d44e Kernel/LibC: remove SYS_TERMID 
This syscall is not needed. /dev/tty is already a symlink to the
controlling terminal. Also this syscall did not handle pseudo terminals
 2026-01-16 15:57:36 +02:00