Bananymous
9781cc5d16
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
6ed6fb6f78
Kernel: Make Inodes use the new lock
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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
39170a437e
Kernel: Implement RecursivePrioritySpinLock
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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
fee9ee0f16
Kernel: Add API to block on semaphore until unblock or EINTR
2023-12-06 16:13:07 +02:00
Bananymous
4a5b38ca07
Kernel: Scheduler::unblock_thread() wakes sleeping threads
2023-12-06 16:12:37 +02:00
Bananymous
b334904427
Kernel: Rework all signal code
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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
afa1f07fd2
Kernel: Remove unnecessary raise syscall
2023-12-06 13:00:45 +02:00
Bananymous
bb831bcdaa
Kernel: Add helper for checking whether segment is from userspace
2023-12-06 12:57:13 +02:00
Bananymous
58be87ba3c
Kernel: Implement mmaping for framebuffer device
2023-11-28 23:51:56 +02:00
Bananymous
eb69fc477b
Kernel: Add API for implementing mmappable devices
2023-11-28 23:50:49 +02:00
Bananymous
4a0bfd08e0
Kernel/LibC: Implement pread()
2023-11-28 23:47:30 +02:00
Bananymous
46ad4f2818
Kernel/LibC: Implement very basic msync
2023-11-22 22:44:06 +02:00
Bananymous
0adb28e23f
Kernel: Delete the now obsolete VesaTerminalDriver
2023-11-22 21:59:11 +02:00
Bananymous
d4aa33b18b
Kernel: Implement TerminalDriver for Framebuffer device
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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
4ba3a17af3
Kernel: Add more APIs to FramebufferDevice
2023-11-22 21:56:27 +02:00
Bananymous
e9d762892c
Kernel: Implement basic framebuffer device
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This allows exposing framebuffer to userspace
2023-11-22 20:34:41 +02:00
Bananymous
52807366bf
Kernel: Make Ext2 filesystem use BlockDevice instead of Partition
2023-11-21 15:20:24 +02:00
Bananymous
b437d4eb41
Kernel: TmpFS doesn't mark any functions as final
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I didn't think these would be overloaded, but they are
2023-11-21 15:19:34 +02:00
Bananymous
8b7f3f1fb2
Kernel: Add common {read,write}_blocks() api to BlockDevice
2023-11-21 15:19:07 +02:00
Bananymous
c607f5385e
Kernel: Move Partition to its own file
2023-11-21 15:16:04 +02:00
Bananymous
5293ae070d
Kernel: ProcFS inodes reflect processes ruid/rgid
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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
a312d75bb2
Bootloader: Implement VESA video mode query and pass it to kernel
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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
065eec430e
Kernel/Bootloader: banan-os can now be booted with my bootloader :D
2023-11-17 20:33:02 +02:00
Bananymous
ec56e9c6f1
Kernel: Don't use multiboot2 explicitly. Parse it to common structure
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This allows support of multiple different bootloaders
2023-11-17 18:54:59 +02:00
Bananymous
447da99f0b
Kernel/LibC: Implement readlink and readlinkat
2023-11-11 23:16:52 +02:00
Bananymous
2191ca46bb
Kernel: Make TmpFS enforce max page count.
2023-11-07 16:13:21 +02:00
Bananymous
cec04a2858
Kernel: Remove now obsolete RamFS
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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
b87351f6d5
Kernel: Make DevFS use the new and better TmpFS instead of RamFS
2023-11-07 16:05:05 +02:00
Bananymous
464737fbe9
Kernel: Add method to TmpFS for looping over all (cached) inodes
2023-11-07 16:04:34 +02:00
Bananymous
8b4f661acb
Kernel: Lock TmpFS in all its methods
2023-11-07 16:03:52 +02:00
Bananymous
27963febc0
Kernel: Implement symlinks to TmpFS
2023-11-07 15:59:50 +02:00
Bananymous
6d4b684219
Kernel: Make PS/2 keyboard wait until interrupts are enabled
2023-11-07 15:58:50 +02:00
Bananymous
1acc0abf2e
Kernel: Make unlinking from /proc always fail with EPERM
2023-11-07 02:40:27 +02:00
Bananymous
a46b2f43d9
Kernel: Make ProcFS use the new TmpFS internally
2023-11-07 02:35:44 +02:00
Bananymous
a20f8607de
Kernel: Implement TmpFS Inode unlinking and deletion
2023-11-06 21:49:12 +02:00
Bananymous
af330f7b8e
Kernel: TmpFS directory inodes now iterate over only valid entries
2023-11-06 21:41:51 +02:00
Bananymous
cbb2c37e00
Kernel: Implement TmpFS inode chmod
2023-11-06 20:11:34 +02:00
Bananymous
ab4f033385
Kernel: Cleanup TmpFS code and block access doesn't require allocs
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TmpFS blocks are now accessed with a simple wrapper
2023-11-06 20:07:09 +02:00
Bananymous
1ed08f62d3
Kernel: TmpInode blocks are on demand allocated
2023-11-06 10:44:37 +02:00
Bananymous
8164c15b6c
Kernel: Implement read/write/truncate for TmpFileInode
2023-11-05 02:28:43 +02:00
Bananymous
f9bf47ab30
Kernel: Start work on proper TmpFS in Heap instead of kmalloc memory
2023-11-04 18:18:45 +02:00
Bananymous
e5ffadb109
Kernel: Add better APIs for fast page
2023-11-04 18:13:16 +02:00
Bananymous
3bac19e518
Kernel: Add fast page to page table
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Add "fast page" to KERNEL_OFFSET. This is always present in page
tables and only requires changing the page table entry to map. This
requires no interrupts since it should only be for very operations
like memcpy.
I used to map all temporary mappings to vaddr 0, but this is much
better. C++ standard always says that nullptr access is undefined
and this gets rid of it.
Fixed some bugs I found along the way
2023-10-30 19:02:09 +02:00
Bananymous
4dbe15aa0e
Kernel: Remove GeneralAllocator since it was not used
2023-10-30 18:13:17 +02:00
Bananymous
ce2461d0e8
Kernel: panic takes arguments as rvalue references
2023-10-30 16:22:02 +02:00
Bananymous
5d34cebeca
Kernel: Fix stack OOB detection
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I now check both interrupt and normal stack to detect OOB. Processes
are killed if they encouner stack over/under flow.
2023-10-30 12:17:08 +02:00
Bananymous
0757834176
Kernel: Rewrite a lot of ext2 code
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This commit consists of multiple big changes
1. blocks for inodes are now allocated on demand
- reading from non allocated block will just return zeroes
- writing to non allocated block allocates it
2. code doesn't really use raw pointers anymore
- all casts to uint32_t or structures are now replaced with
spans. either as<T> or as_span<T> which both are bounds
checked
3. code doesn't depend on random macros for accessing indirect blocks
- i added some recursive functions which take care of this :)
2023-10-28 22:13:28 +03:00
Bananymous
99bde9aa49
Kernel: Fix ext2 inode deletion cleanup
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I now cleanup all blocks (including direct) in i_block array
2023-10-28 16:52:56 +03:00
Bananymous
d09310f388
Kernel: Fix ext2 inode deletion
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fsck now reports clean filesystem even after deleting files
2023-10-26 02:05:05 +03:00
Bananymous
74bfb930f2
Kernel/LibC: Add syscall and wrapper for unlink
2023-10-25 21:45:04 +03:00