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916 Commits

Author SHA1 Message Date
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 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 44b762f916 Kernel/LibC: Implement pwrite and make pread non-locking 2025-05-28 03:10:01 +03:00
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 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 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 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 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 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 6f9dc2a9b8 Kernel/LibC: Implement `fchdir`, cleanup `chdir` and `getcwd` 2025-04-19 21:28:31 +03:00
Bananymous 85505b0482 Kernel: Fix ANSI SGR color invert 2025-04-18 17:31:46 +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 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 cef8779bf7 Kernel: Improve error handling when setting TTY font 2025-04-18 02:42:24 +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 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 00015285ab Kernel: Add vaddr->paddr getter to VirtualRange 2025-04-15 21:25:15 +03:00
Bananymous 15045cc486 Kernel: Make nonblocking sockets unblocking :) 2025-04-05 18:42:02 +03:00
Bananymous c9132d984b Kernel: Fix TCP window scaling 2025-04-05 18:40:23 +03:00
Bananymous be786be67d Kernel/LibC: Implement pthread_join 2025-04-02 12:58:39 +03:00
Bananymous 9066e62a97 Kernel/LibC: Implement sched_yield 2025-04-02 12:58:39 +03:00
Bananymous 5549696c3a Kernel/LibC: Implement pthread_self 2025-04-02 02:39:29 +03:00
Bananymous c1618e2b5d Kernel/LibC: Add basic support for pthread_{create,exit} 2025-04-01 23:26:13 +03:00
Bananymous 36026d4ec6 Kernel: Cleanup TCP and add basic window scaling support 2025-04-01 23:09:30 +03:00
Bananymous 96767f5ca8 Kernel: Implement PCI interrupt routing 
This does not really work but I have no idea what I'm doing wrong
 2025-04-01 23:09:30 +03:00
Bananymous 27613da5ea Kernel: Route PCI Interrupt Link Device interrupts 2025-04-01 23:09:30 +03:00
Bananymous 1c1fc65c7c Kernel: Add API to reserve GSI instead of irq 
This also fixes a bug with IOAPIC gsi_base != 0
 2025-04-01 23:09:30 +03:00
Bananymous 0474ac4262 Kernel: Expose ACPI resolve_package_element to outside 2025-04-01 23:09:30 +03:00
Bananymous aba49cc93f Kernel: Add API to get ACPI reference paths 2025-04-01 23:09:30 +03:00
Bananymous 0e085b30cc Kernel: ACPI add easier API for calling methods with arguments 2025-04-01 23:09:30 +03:00