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1632 Commits

Author SHA1 Message Date
Bananymous 8da4f80453 Kernel: Add custom stack to double fault handler 
This prevents triple faults!
 2025-07-02 23:14:52 +03:00
Bananymous 6084aae603 Kernel: Add guard pages to kernel and userspace stacks 2025-07-02 23:12:36 +03:00
Bananymous e1319a06f2 Kernel: Remove accidentally commited debug prints 2025-07-02 23:09:57 +03:00
Bananymous 51fd7a607d Kernel: Fix IDE controller waiting 
We did not correctly wait until controller is ready to receive data on
write command. Also remove possible kernel panic if controller sends
unexpected interrupts
 2025-07-02 22:04:41 +03:00
Bananymous 8a0269d29e Kernel: Remove kernel processes 
Kernel can just use raw threads, pretty muchs the only thing that
process provides is syscalls which kernel threads of course don't
need.

Also this makes init process have pid 1 :D
 2025-07-02 01:54:03 +03:00
Bananymous 892e16dfb1 Kernel: Increase PS2 timeout to 300 ms, load PS2 in separate thread 
PS/2 seems to hit command timeout sometimes on slow emulation so
increase the timeouts.

Also move PS/2 device initialization to a different thread because
device indentification waits for timeouts.
 2025-07-02 00:17:42 +03:00
Bananymous 92e4078287 Kernel: Rewrite ThreadBlocker 
This gets rid of a very old bug where kernel panics when thread is being
woken up and unblocked at the same time on different cores. This
required adding a new lock to SchedulerQueue::Node and adding a cap to
how many threads a threadblocker can simultaneously block. I don't think
I ever block more than five threads on the same ThreadBlocker so this
should be fine.
 2025-07-02 00:17:42 +03:00
Bananymous 41e1819072 Kernel: Align argv and envp to pointer boundary 
This bug was found with ubsan
 2025-07-02 00:17:42 +03:00
Bananymous fb7e9719a1 Kernel: Add fast fill method to framebuffer device 
This makes `clear` much faster when running without kvm!
 2025-07-02 00:17:42 +03:00
Bananymous c2d09b64ca Kernel: Drop 24 bpp support from double buffer 
I don't even know why this was supported, I am not planning on making
the fb anything other than 32 bpp
 2025-07-02 00:17:42 +03:00
Bananymous 1b2aa6c2da Kernel: Fix unaligned access in AML 
Found with ubsan
 2025-07-02 00:17:42 +03:00
Bananymous a5b4cee298 Kernel: Load USTAR from a boot module if loading root partition fails 
This allows banan-os to boot on hardware where we don't have working
storage driver or the storage driver fails (pretty common with my usb
mass storage drivers...)
 2025-07-02 00:17:42 +03:00
Bananymous 17f1ac10e3 Kernel: Don't ignore modules passed with multiboot2 2025-07-02 00:17:42 +03:00
Bananymous c67198032f Kernel: Rewrite TmpFS block and inode allocation 
This makes creating files and appending to then A LOT faster. Some code
I tested took 40 seconds in the previous implementation and less than a
second on the new one!

This code is really sketcy, I hope I'll never have to touch it again :)
 2025-07-02 00:17:42 +03:00
Bananymous 107b092982 Kernel: Allow arbitrary sized tmpfs files 
The 2 block limit started to get annoying :D
 2025-07-02 00:17:42 +03:00
Bananymous bac06e45a4 Kernel: Fix TmpSymlinkInode target getting/setting 2025-07-02 00:17:42 +03:00
Bananymous 0e8a68831c Kernel: Fix TmpInode chmod not preserving file type 2025-07-02 00:17:42 +03:00
Bananymous 5912abd541 Kernel: Add error reporting for readonly mounted filesystems 2025-07-02 00:17:42 +03:00
Bananymous 13d33995cb Kernel: Make sure PageTable::fast_page gets passed page aligned addr 2025-06-30 01:48:47 +03:00
Bananymous c8c05f62b4 Kernel: Remove unused FileSystem::dev 2025-06-29 00:29:03 +03:00
Bananymous ebf2b16d09 Kernel: Implement chown to ext2 and tmpfs 2025-06-28 21:28:54 +03:00
Bananymous 7314cf708c Kernel: Only restart certain syscalls with SA_RESTART 
SA_RESTART is not supposted to restart every function.
 2025-06-28 20:25:35 +03:00
Bananymous db571b4859 Kernel: Allow relockign mutex even when holding a spinlock 
Only reason mutex locking is now allowed with spinlocks is to prevent
yield.

Also try_lock can be now safely used while holding a spinlock
 2025-06-28 19:40:54 +03:00
Bananymous e8491b34b8 Kernel/LibC: Rework TIOC{G,S}WINSZ more linux like 
Userspace can freely set terminal size, kernel just updates it when for
example new font is loaded. Also SIGWINCH is now sent by kernel instead
of userspace.
 2025-06-28 19:40:54 +03:00
Bananymous f73bb242f3 Kernel: Save fpu state and flags in signal handler 
This was causing some weird crashes :D
 2025-06-28 16:55:13 +03:00
Bananymous 9e895e5286 Kernel: Use fxsave64 and fxrstor64 on 64 bit target 2025-06-28 16:55:13 +03:00
Bananymous 5b0e5512a8 Kernel: Don't block in send until full message is sent 
Only block until some data was sent. This allows select + send to be
actually non blocking if used correctly.

Also fixes a bug with non blocking sockets that could not send the full
message is one try.
 2025-06-28 16:55:13 +03:00
Bananymous 05a727979a Kernel: Make sse initialization thread safe 2025-06-28 16:55:13 +03:00
Bananymous fe62ce4bae Kernel: Fix spurious wakeup from SYS_SLEEP 2025-06-28 16:55:13 +03:00
Bananymous 4695fa061d Kernel: Don't panic if UNIX socket is already bound but deleted 2025-06-28 16:55:13 +03:00
Bananymous 83c0ef3514 Kernel: Implement CLOCK_{PROCESS,THREAD}_CPUTIME_ID 2025-06-28 16:55:13 +03:00
Bananymous 93e5d09a63 Kernel/LibC: Implement flock 2025-06-28 16:55:13 +03:00
Bananymous 6d3d41abe2 Kernel: Fix possible division by zero in scheduler 2025-06-28 16:55:13 +03:00
Bananymous 3283359ac8 Kernel: Cleanup ANSI DSR 2025-06-19 19:05:49 +03:00
Bananymous fff16f6b8c Kernel: don't directly access user memory in mmap 2025-06-19 19:04:20 +03:00
Bananymous a347ceba74 Kernel: Cleanup sys_wait sleep/signal handling 2025-06-19 19:03:42 +03:00
Bananymous 05836fab4c Kernel: Allow accessing fd's inode without having read/search access 
I have no idea what the point of this was. VFS is already verifying
read and search access
 2025-06-19 19:02:28 +03:00
Bananymous 32c35a822b BuildSystem: binutils1.39->1.44, gcc12.2.0->15.1.0 2025-06-19 19:00:50 +03:00
Bananymous 9c86e5e54d Kernel: Add ANSI SGR 39 and 49 
Also debug log unimplemented ANSI SRGs, this makes finding missing
commonly used ANSI SGR codes more easy
 2025-06-18 20:34:55 +03:00
Bananymous 125f8b591d Kernel: Don't crash if socket tries to reconnect 
:D
 2025-06-11 01:54:41 +03:00
Bananymous e92f039a17 Kernel: Fix tcp sending with already sent unacknowledged bytes 2025-06-06 11:55:44 +03:00
Bananymous ef76ffa1c1 Kernel: Remove unnecessary hack 
This is no longer needed as thread unlocks its spinlock before calling
Process::exit() on terminating signal
 2025-06-06 11:13:55 +03:00
Bananymous 652eb2346c Kernel: Fix syscall interrupt disabling 
If thread had a terminating signal, syscall leaving would try to lock
process's mutex while not having interrupts enabled
 2025-06-06 11:12:48 +03:00
Bananymous 66726090ec Kenrel: Fix TCP connection closing 
If TCP socket was connected with connect() instead of accept() it would
never send FIN to other end when it was closed.
 2025-06-06 11:10:29 +03:00
Bananymous b668173cba Kernel: Fix pseudo terminal writability 2025-06-06 11:09:50 +03:00
Bananymous c6ded82406 Kernel: Fix a deadlock when thread is executing terminating signal 2025-06-06 06:52:27 +03:00
Bananymous a76c6faffc Kernel: Fix a deadlock when process is exiting 2025-06-06 06:52:02 +03:00
Bananymous 81ff71a97f Kernel: Track the number of recursive spinlocks a thread is holding 2025-06-06 06:51:15 +03:00
Bananymous 56db0efe58 Kernel: Add missing file for race condition fixes :) 2025-06-06 04:03:37 +03:00
Bananymous 5eefd98e1b Kernel: Add debugging macro to dump syscalls that take a long time 2025-06-06 04:00:57 +03:00