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1632 Commits

Author SHA1 Message Date
Bananymous eecdad50a6 Kernel: Fix most of mutex + block race conditions 
All block functions now take an optional mutex parameter that is
atomically unlocked instead of having the user unlock it before hand.
This prevents a ton of race conditions everywhere in the code!
 2025-06-06 03:59:22 +03:00
Bananymous 96d5ed9cc7 Kernel: Fix E1000 driver interrupts 
I have no idea why, but E1000 seems to be missing interrupts frequently
when clearing ICR only at the end of the interrupt handler
 2025-06-06 03:45:35 +03:00
Bananymous 73090ecb37 Kernel: TTY set EPOLLOUT 2025-06-05 22:04:51 +03:00
Bananymous 8812704601 Kernel: Make sure IPv4 and ARP packets are not missed 
This is a really hacky solution but will do until i get atomic
unblocking with respect to locks
 2025-06-05 22:03:15 +03:00
Bananymous 0f189d410e Kernel: Fix unix socket recv from 
If connection on unix socket was closed and other end tries to recvfrom,
the thread would enter a fucked up state where it held the socket's
spinlock when returning to userspace.
 2025-06-05 22:02:53 +03:00
Bananymous cfeabc4580 Kernel/Terminal: Fix ANSI SGR 8 bit color parsing 2025-06-05 20:43:57 +03:00
Bananymous f79db874bf Kernel: Fix ANSI CSI 1J 
I was accidentally clearing the whole screen when I needed to clear from
cursor to the end of the screen
 2025-06-05 02:38:57 +03:00
Bananymous 8de19aff3c Kernel/Terminal: Fix 24 bit ANSI SGR color parsing 2025-06-05 02:38:07 +03:00
Bananymous bf41b448d6 Kernel: Fix TCP sending 
- Fix race condition when adding packet to send buffer before other end
  has acknowledged it
- Allow sending multiple packets before receiving ACK for previous ones
 2025-06-04 22:21:35 +03:00
Bananymous 448632cf11 Kernel: Add fast path to pselect and ppoll 
If events are available right away, don't create epoll object to wait
on. Also fix pselect return value to the number of bits set. Previously
return value could've been greater than that if epoll return EPOLLERR or
EPOLLHUP for events that were not listened to
 2025-06-04 17:51:22 +03:00
Bananymous 943069b2a3 Kernel: Socket EPIPE and send SIGPIPE on write after hang up 2025-06-03 10:24:44 +03:00
Bananymous e305698e6b Kernel: Fix epoll EPOLLHUP and EPOLLERR reporting 2025-06-03 10:23:53 +03:00
Bananymous 4c0b7d44b4 Kernel: Enable ECHOE and ECHOK, support VKILL, fix VEOF 2025-06-02 16:26:53 +03:00
Bananymous fb466b5af7 Kernel: use termios c_cc values instead of hardcoded characters 2025-06-02 15:54:11 +03:00
Bananymous 7a645b8555 Kernel: Add SMP message StackTrace 
This event is sent when user presses ctrl+{F1-F12} and it will dump the
corresponding processor's stack trace. This is really helpful for
detecting deadlocks in the system
 2025-06-02 11:39:18 +03:00
Bananymous c5b0d0235f Kenrel: Allow Processor::send_smp_message to send event to current CPU 2025-06-02 11:39:18 +03:00
Bananymous e109b5cff6 Kernel: Remove unnecessary locks from Pipe 
Inode already locks its own mutex when read/write is called there is no
need to explicitly lock them in read_impl/write_impl
 2025-06-02 11:39:18 +03:00
Bananymous 9883fb7bf6 Kernel: Rewrite epoll notifying system 
This removes the need to lock epoll's mutex when notifying epoll. This
prevents a ton of deadlocks when epoll is notified from an interrupt
handler or otherwise with interrupts disabled
 2025-06-02 11:39:18 +03:00
Bananymous b2e3aefa72 Kernel: Don't crash when terminating process with signal 2025-06-01 16:59:02 +03:00
Bananymous 31bcad2535 LibC: Implement truncate 2025-06-01 13:48:03 +03:00
Bananymous b75970958e Kernel/LibC: Implement unlinkat 2025-06-01 13:48:03 +03:00
Bananymous 91756c057e LibC: Add all of the missing POSIX definitions in unistd.h and limits.h 2025-06-01 13:48:03 +03:00
Bananymous dbdefa0f4a LibC: Implement pthread cancelation 
This code is not tested at all but it looks correct xD
 2025-06-01 13:48:03 +03:00
Bananymous 56fdf6002c Kernel/LibC: Implement pthread_kill 2025-06-01 13:48:03 +03:00
Bananymous c957f1ddca LibC: Cleanup pthread code and add some pthread_attr functions 
errno, pthread cleanup and pthread id are now stored in uthread. This
allows using these without TLS
 2025-06-01 13:48:03 +03:00
Bananymous b1065fa01d Kernel/LibC: Add ppoll syscall and fix poll 
poll is now using its own syscall instead of wrapping aroung pselect.
This adds less overhead on top of poll and adds support for POLLHUP
 2025-06-01 13:48:03 +03:00
Bananymous 8ff9c030bf Kernel: Add better termios support 
I'm not sure if this is correct but at least it's better than before :)
 2025-06-01 13:48:03 +03:00
Bananymous 9b875fb930 Kernel: Make epoll work with different fds pointing to same inode 2025-06-01 13:48:03 +03:00
Bananymous 857bac4b78 Kernel: Disable unused interrupt methods in PCI devices 2025-06-01 13:48:03 +03:00
Bananymous 30074c290d Kernel: Add more descriptive names to sockets types 2025-06-01 13:48:03 +03:00
Bananymous 60d1c26114 Kernel: Fix race condition in FileBackedRegion creation 2025-06-01 13:48:03 +03:00
Bananymous 692ba43182 Kernel: Fix spinlock bugs found by the new spinlock security 2025-06-01 13:48:03 +03:00
Bananymous 6542a037df Kernel: Make spinlocks more safe 
Kernel now makes sure thread is not holding any spinlocks when it tries
to lock a mutex or yield. Spinlocks are supposed to be only used for
short times without the possibility of yielding
 2025-06-01 13:48:03 +03:00
Bananymous 9f4b451501 Kernel: Fix epoll deadlock 
If epoll_wait and epoll_notify were called at the same time, there was a
possible deadlock when epoll was confirming the event from the inode
 2025-06-01 13:48:03 +03:00
Bananymous 1bd454b8fd Kernel/LibC: Implement utime* family functions 
This patch adds *working*
 - utime
 - utimes
 - utimensat
 - futimens
 2025-06-01 13:48:03 +03:00
Bananymous cd5b351ce4 Kernel: Fix fchmodat mode handling 
Ignore file type bits instead of returning EINVAL if they are set
 2025-05-29 03:24:31 +03:00
Bananymous 4d4fb3b6ec Kernel: Cleanup and fix pipe 
pipe now sends SIGPIPE and returns EPIPE when writing and no readers are
open
 2025-05-29 01:02:22 +03:00
Bananymous 89c9bfd052 Kernel/LibC: Implement `socketpair` for UNIX sockets 2025-05-28 03:10:01 +03:00
Bananymous 12b93567f7 Kernel/LibC: Implement `getpeername` 2025-05-28 03:10:01 +03:00
Bananymous 2f37776614 Kernel: Notify epoll on new TCP connections 2025-05-28 03:10:01 +03:00
Bananymous f778bca3f2 Kernel: Remove accidentally commited debug code :) 2025-05-28 03:10:01 +03:00
Bananymous a945d19750 Kernel: Partially fix PCI PIN interrupt routing 
Don't fail early if the first device is not the one we are looking for
 2025-05-28 03:10:01 +03:00
Bananymous 7f04b2c96c Kernel: Fix E1000 interrupt handling 
E1000 does not support MSI-X and thus does not generate RxQ0 interrupts.
 2025-05-28 03:10:01 +03:00
Bananymous 79a2b84c81 Kernel: Fix process exit when there are multiple threads 2025-05-28 03:10:01 +03:00
Bananymous 44b762f916 Kernel/LibC: Implement pwrite and make pread non-locking 2025-05-28 03:10:01 +03:00
Bananymous 6be3b1d7f2 commit from banan-os :D 2025-05-27 23:57:43 +00:00
Bananymous 0e0d7016b3 Kernel: Rename has_hangup -> has_hungup 2025-05-17 12:39:23 +03:00
Bananymous 553c76ab0f Kernel: Add locking to inode's epoll list 
This was prone to crashing :)
 2025-05-17 12:36:36 +03:00
Bananymous d1bb72f6fb Kernel: Don't allow CPU load printing underflow 2025-05-13 10:19:13 +03:00
Bananymous 1bcd1edbf5 Kernel/LibC: Implement basic epoll 
This implementation is on top of inodes instead of fds as linux does it.
If I start finding ports/software that relies on epoll allowing
duplicate inodes, I will do what linux does.

I'm probably missing multiple epoll_notify's which may cause hangs but
the system seems to work fine :dd:
 2025-05-13 10:18:05 +03:00
Bananymous 143a00626b Kernel: Fix fork cmdline copying and copy environ 2025-05-13 10:16:21 +03:00
Bananymous 0eb981f51c Kernel: Fix Random.h includes 2025-05-13 10:16:21 +03:00
Bananymous 6cc01349f7 Kernel: Fix unblocking recv through read 2025-05-13 10:16:21 +03:00
Bananymous a7bd4acd46 Kernel: Remove static variables from virtual tty 2025-05-13 10:16:21 +03:00
Bananymous 8e0a56b49a Kernel: Implement loopback network interface 2025-05-13 10:16:21 +03:00
Bananymous 96496da0ab Kernel: Allow USB mouse to send extra2 button events 2025-05-05 22:32:26 +03:00
Bananymous 592675022e Kernel: Allow tcgetpgrp on pseudo terminal masters 2025-05-05 19:09:01 +03:00
Bananymous b2e10d7e6e Kernel: Remove unnecessary locks 2025-05-05 19:08:57 +03:00
Bananymous 9ff9d679e9 Kernel: Fix text mode cursor 
Apparently text mode renders cursor in the *foreground* color. My
current clear function used the same color for foreground and background
making the cursor effectively invisible.

Also cursor hiding is now done by moving the cursor off bounds (0, height)
some website I read said this to be valid even on VGA compatible cards
without disable bit.

http://www.osdever.net/FreeVGA/vga/textcur.htm
 2025-04-25 02:31:33 +03:00
Bananymous 9f3f8f950a Kernel: Add better panic message for failed shutdown 
ACPI shutdown does not work on the web emulator and running `poweroff`
crashes on `ASSERT_NOT_REACHED()`.
 2025-04-25 01:52:33 +03:00
Bananymous 418678466c Kernel: Fix text mode palette 
ANSI and text mode color indices are not in the same order
 2025-04-23 23:07:47 +03:00
Bananymous 9f4cb5c4dd Kernel: Make pseudo terminals not overwrite old data 
If pseudo terminal buffer was filled, old implementation would overwrite
old data. This is bad if producer is capable of producing more data than
consumer can handle.
 2025-04-23 22:03:53 +03:00
Bananymous a8edb8870e Kernel: Add support for 8bit and 24bit ANSI SGR 2025-04-23 22:03:53 +03:00
Bananymous dabc3c6cc4 Kernel: Don't wrap cursor immediatly at cols() 
This prevents unwanted scrolling when writing to bottom right cell
 2025-04-23 22:03:53 +03:00
Bananymous cc7c1ad30d Kernel: Add per terminal palette for TerminalDriver 
This allows better color approximation on text mode and in future will
allow user to possibly change the palette
 2025-04-23 18:44:37 +03:00
Bananymous 35b3c3c98c Kernel: Fix scheduler load balancing 
I was not updating the current queue of the thread which lead to blocked
threads think they were in run queue
 2025-04-23 08:09:51 +03:00
Bananymous 20e17a28cf Kernel: Fix \b handling 
Don't clear the character, only move cursor backwards
 2025-04-23 06:33:11 +03:00
Bananymous 28bf2d6374 Kernel/Terminal: Add support for ANSI DSR 2025-04-23 06:14:56 +03:00
Bananymous 8a00b53050 Kernel/Terminal: Fix ANSI SGR m for multiple values 2025-04-23 05:29:22 +03:00
Bananymous b853d29992 Kernel: Fix unix domain socket close detection 2025-04-22 08:36:44 +03:00
Bananymous f8e3ae0525 Kernel: Fix deadlock caused by multithreading 
This allows multiple threads to concurrently call the most common
blocking syscalls:
- read
- write
- accept
- connect
- sendto
- recv
- pselect

This prevents a dead lock when for example process is waiting on a pipe,
but unable to write to it since process is locked.

This is the beginning of starting to remove processes own lock from
syscall and locking only necessary parts.
 2025-04-22 04:51:53 +03:00
Bananymous c790bad667 Kernel: Make OpenFileDescriptorSet thread safe 
Also this allows concurrent calling of read/write/send/recv
 2025-04-22 04:31:18 +03:00
Bananymous d54489bbcb Kernel: Implement MemoryRegion pinning 
This allows process to pin a MemoryRegion into users memory space for
syscall duration without allowing user to munmap the region.
 2025-04-22 04:30:07 +03:00
Bananymous 808c97020a Kernel/LibC: Implement SA_RESTART 
I have been thinking how to do this for a long time but I finally
figured out a semi-clean way
 2025-04-22 02:42:44 +03:00
Bananymous 107b31a0b5 Kernel: Fix E1000{,E} driver for older qemu versions 
This patch adds clearing of *Interrupt Cause Registers*, which allows
older qemu versions to send new interrupts. Apparently this is not
needed on newer releases.
 2025-04-22 00:31:13 +03:00
Bananymous 1c44d24b76 Kernel: Fix TCP closing state machine 2025-04-21 20:02:32 +03:00
Bananymous 99fc7817c6 Kernel: Cleanup stack alignment assembly 2025-04-20 16:55:18 +03:00
Bananymous 252784ff5b Kernel: Preserve kernel command line on fork 2025-04-19 21:29:52 +03:00
Bananymous 6f9dc2a9b8 Kernel/LibC: Implement `fchdir`, cleanup `chdir` and `getcwd` 2025-04-19 21:28:31 +03:00
Bananymous 201d752850 Kernel: Allow pipe to write partial data 
This allows potential blocking
 2025-04-19 00:39:42 +03:00
Bananymous 63b3d9875d Kernel: Fix `Thread::block_with_eintr*` functions 
I was using wrong block function, `block_with_timeout` instead of
`block_with_wake_time`. This caused functions to block way too long and
caused a lot of hangs.
 2025-04-19 00:39:42 +03:00
Bananymous 85505b0482 Kernel: Fix ANSI SGR color invert 2025-04-18 17:31:46 +03:00
Bananymous 703c1a485c Kernel: Fix Ext2 bug for big files 
My ext2 implementation was reading wrong blocks for very big block
indices.
 2025-04-18 04:17:31 +03:00
Bananymous 9258c73484 Kernel: Optimize VTTY cursor rendering 
cursor is now only updated once after all consecutive `putchar`s are
handled.
 2025-04-18 03:55:56 +03:00
Bananymous 6858546ce9 Kernel: Fix rendering bugs with framebuffer cursor 2025-04-18 03:54:17 +03:00
Bananymous 7c6966a9c4 Kernel: Add support for text mode terminal 
This probably won't be used at all but it was so simple and made me do
really nice refactorings so i decided to add it :)
 2025-04-18 02:45:06 +03:00
Bananymous 40d1d20cd6 Kernel: Move cursor handling from TTY -> TerminalDriver 2025-04-18 02:43:41 +03:00
Bananymous c0942d78cb Kernel: Fix TTY ANSI ? handling 2025-04-18 02:42:49 +03:00
Bananymous cef8779bf7 Kernel: Improve error handling when setting TTY font 2025-04-18 02:42:24 +03:00
Bananymous d6667844de Kernel: Fix fcntl F_SETFL and masking 2025-04-18 02:37:44 +03:00
Bananymous 4cdf218145 Kernel: Don't allow opening file with path "" 2025-04-18 02:37:16 +03:00
Bananymous 994713d04c Kernel: Implement FramebufferDevice::get_pixel() 2025-04-18 02:35:28 +03:00
Bananymous 554b13ac50 Kernel: Restructure terminal initialization 
This is still very ugly and will be rewritten in the future :D
 2025-04-18 01:19:59 +03:00
Bananymous 439fb57d88 Kernel: Fix ANSI CSI @ and b for VirtualTTY 2025-04-17 23:24:17 +03:00
Bananymous ac90800c3c Kernel/LibC/DynamicLoader: Implement thread local storage 
For some reason this does not work on 32 bit version, so it is disabled
on that platform. I'll have to look into it later to find the bug :)
 2025-04-15 23:33:39 +03:00
Bananymous 08f5833ca8 Kernel/LibC: Implement pthread_attr_init 2025-04-15 23:31:17 +03:00
Bananymous 4bcd3ed86f Kernel: Start working on TLS, add SYS_{SET,GET}_TLS 2025-04-15 23:31:17 +03:00
Bananymous a933fabb86 Kernel: Define constant USERSPACE_END 
This should be used for userspace generic allocations. Currently I used
KERNEL_OFFSET, but I want to limit userspace to the actual lower half of
the address space
 2025-04-15 23:31:17 +03:00
Bananymous 36baf7b0af Kernel/LibC/DynamicLoader: Update process start ABI 
We now use SysV abi for process startup
 2025-04-15 23:05:52 +03:00
Bananymous 4b1c20fa36 Kernel: Make SYS_{,P}READ work with count == 0 2025-04-15 21:36:00 +03:00