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840 Commits

Author SHA1 Message Date
Bananymous 2e858fddb5 Kernel: Remove obsolete Scheduler::is_valid_tid() 
This function was used when processes could die at any point in time.
Now that processes can only die in known spots, we can be sure they
are not holding any locks. This allows much more performant locking.
 2023-12-07 13:26:42 +02:00
Bananymous 12474addda Kernel: Make Inodes use the new lock 
Also remove old lock from TTY since it can just use the one Inode
already has.
 2023-12-07 13:19:12 +02:00
Bananymous 7c25e4ce5a Kernel: Implement RecursivePrioritySpinLock 
This locks won't allow locking from userspace thread if there is
kernel thread waiting to lock this.
 2023-12-07 13:18:21 +02:00
Bananymous 24b71d1170 Kernel: Appreciate setuid and setgid bits executables 2023-12-06 18:14:27 +02:00
Bananymous 393ac33e3c Kernel: Make sys_nanosleep interruptable by signals 2023-12-06 16:22:24 +02:00
Bananymous deeb6d2756 Kernel: Cleanup sys_sleep() and TTY::read_impl 2023-12-06 16:21:22 +02:00
Bananymous 1ac831d4b1 Kernel: Add API to block on semaphore until unblock or EINTR 2023-12-06 16:13:07 +02:00
Bananymous 534969df32 Kernel: Scheduler::unblock_thread() wakes sleeping threads 2023-12-06 16:12:37 +02:00
Bananymous a12ffaa8a2 Kernel: Make sleep syscall interruptable 2023-12-06 13:13:37 +02:00
Bananymous 1c78671078 Kernel: Rework all signal code 
Signal handling code was way too complex. Now everything is
simplified and there is no need for ThreadBlockers.

Only complication that this patch includes is that blocking syscalls
have to manually be made interruptable by signal. There might be some
clever solution to combat this is make this happen automatically.
 2023-12-06 13:02:17 +02:00
Bananymous cdcc36efde Kernel: Remove unnecessary raise syscall 2023-12-06 13:00:45 +02:00
Bananymous 336daa2cc5 Kernel: Add helper for checking whether segment is from userspace 2023-12-06 12:57:13 +02:00
Bananymous c140dd2a65 Kernel: Fix keyboard layout for underscore 2023-12-01 12:31:16 +02:00
Bananymous 9b841cb823 BuildSystem/Kernel: Enable -Wextra and -Werror in kernel 
Only needed to fix some unused variable bugs
 2023-12-01 01:22:53 +02:00
Bananymous c1cac43f28 BuildSystem: Don't build lai with -Wstack-usage 
Lai has two functions that trigger warnings on gcc. There isn't
really anything I can do about it, so just disable the warning
 2023-12-01 01:22:53 +02:00
Bananymous fdb6dc94ba Kernel: cast between inheritance with static_cast 
using reinterpret_cast is not a good idea. preferably we would use
dynamic_cast, but that is not possible since kernel is compiled with
-fno-rtti.
 2023-11-29 20:50:57 +02:00
Bananymous 327b330338 Kernel: Make internal framebuffer bpp constexpr defined in libc 2023-11-29 20:07:33 +02:00
Bananymous d7a3aca5d4 Kernel: Use the correct bpp when writing to framebuffer 2023-11-29 00:31:24 +02:00
Bananymous cc572af390 Kernel: Implement mmaping for framebuffer device 2023-11-28 23:51:56 +02:00
Bananymous 4275d2ce48 Kernel: Add framebuffer device to devfs 2023-11-28 23:51:28 +02:00
Bananymous 4a87d6052b Kernel: Add API for implementing mmappable devices 2023-11-28 23:50:49 +02:00
Bananymous d86ecf4f61 Kernel: Reading from negative offset in fb dev gives out info 2023-11-28 23:50:11 +02:00
Bananymous 09b7cb2f33 Kernel/LibC: Implement pread() 2023-11-28 23:47:30 +02:00
Bananymous 60e755210c Kernel/LibC: Implement very basic msync 2023-11-22 22:44:06 +02:00
Bananymous ab9954fe73 Kernel: Delete the now obsolete VesaTerminalDriver 2023-11-22 21:59:11 +02:00
Bananymous fd18071975 Kernel: Implement TerminalDriver for Framebuffer device 
Use this new FramebufferTerminalDriver for terminal instead of the
old VesaTerminalDriver. Only drawback with this is that framebuffer
device can only be intialized after DevFS is initialized.
 2023-11-22 21:57:17 +02:00
Bananymous b88a7e0c6b Kernel: Add more APIs to FramebufferDevice 2023-11-22 21:56:27 +02:00
Bananymous cdf53f33f6 Kernel: Implement basic framebuffer device 
This allows exposing framebuffer to userspace
 2023-11-22 20:34:41 +02:00
Bananymous bc5e8add19 Kernel: Make Ext2 filesystem use BlockDevice instead of Partition 2023-11-21 15:20:24 +02:00
Bananymous 7a8fd6d04a Kernel: TmpFS doesn't mark any functions as final 
I didn't think these would be overloaded, but they are
 2023-11-21 15:19:34 +02:00
Bananymous b749963b62 Kernel: Add common {read,write}_blocks() api to BlockDevice 2023-11-21 15:19:07 +02:00
Bananymous 6a068fb9f9 Kernel: Move Partition to its own file 2023-11-21 15:16:04 +02:00
Bananymous cadb56d8ba Kernel: ProcFS inodes reflect processes ruid/rgid 
setgid/setuid did not change the permissions of procfs inodes. This
made Shell launched by init not appear in meminfo.
 2023-11-18 14:26:44 +02:00
Bananymous c9e9cfd361 Bootloader: Implement VESA video mode query and pass it to kernel 
Kernel now gets framebuffer from bootloader. Framebuffer dimensions
and bpp are hardcoded in bootloader, but will probably be read from
config file at some point.
 2023-11-17 22:45:35 +02:00
Bananymous cb5a5d3ed1 Kernel/Bootloader: banan-os can now be booted with my bootloader :D 2023-11-17 20:33:02 +02:00
Bananymous 95af728e39 Kernel: Don't calculate divisor in a for loop in ext2 inodes 2023-11-17 19:02:01 +02:00
Bananymous 24d87acec4 Kernel: Serial now uses random size for some serial ports 
If the serial port doesn't repond with a size, just use a random
one. There is no reason to ditch the whole output if you cannot
determine its size.
 2023-11-17 18:56:02 +02:00
Bananymous 84040e64b8 Kernel: Don't use multiboot2 explicitly. Parse it to common structure 
This allows support of multiple different bootloaders
 2023-11-17 18:54:59 +02:00
Bananymous c084ce8b01 Kernel/LibC: Implement readlink and readlinkat 2023-11-11 23:16:52 +02:00
Bananymous fda0dfec30 Kernel: Make TmpFS enforce max page count. 2023-11-07 16:13:21 +02:00
Bananymous d6ae1bcf36 Kernel: Remove now obsolete RamFS 
Everything is using now the better TmpFS which uses physical pages
for page allocation instead of the static kmalloc memory.
 2023-11-07 16:07:11 +02:00
Bananymous 5044810451 Kernel: Make DevFS use the new and better TmpFS instead of RamFS 2023-11-07 16:05:05 +02:00
Bananymous 147cd93ed3 Kernel: Add method to TmpFS for looping over all (cached) inodes 2023-11-07 16:04:34 +02:00
Bananymous 07b5920f3f Kernel: Lock TmpFS in all its methods 2023-11-07 16:03:52 +02:00
Bananymous 2bcf934389 Kernel: Implement symlinks to TmpFS 2023-11-07 15:59:50 +02:00
Bananymous 1405712f26 Kernel: Make PS/2 keyboard wait until interrupts are enabled 2023-11-07 15:58:50 +02:00
Bananymous 885ed218fa Kernel: Make unlinking from /proc always fail with EPERM 2023-11-07 02:40:27 +02:00
Bananymous b1f431d962 Kernel: /tmp is now TmpFS instead of RamFS 2023-11-07 02:36:22 +02:00
Bananymous 06e176e6b9 Kernel: Make ProcFS use the new TmpFS internally 2023-11-07 02:35:44 +02:00
Bananymous b7771e95ac Kernel: Implement TmpFS Inode unlinking and deletion 2023-11-06 21:49:12 +02:00