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759 Commits

Author SHA1 Message Date
Bananymous 9f0797047f Kernel/LibC: dirent now contains file type 2023-09-30 20:46:57 +03:00
Bananymous e8a0eeb0b4 Kernel: RamInode verifies that you have not specified mode type 
This is kinda weird behaviour, but it ensures the user cannot
create e.g. CharacterDevice with mode having IFLNK.

The Inode overrider is the only one setting the mode.
 2023-09-30 20:46:57 +03:00
Bananymous 3e5645d453 Kernel: Add API for RamDirectoryInodes to delete containing inodes 2023-09-30 19:22:30 +03:00
Bananymous 2301654c4e Kernel: Rework RamInode API 
RamInode is now a general RamInode with no data. RamFileInode is now
a inode for regular files. This is much cleaner and more intuitive
since there is no reason for most non-regular inodes to hold data
Vector.
 2023-09-30 19:22:30 +03:00
Bananymous 43c23db4a6 Kernel: Implement MAP_SHARED for regular files 
Every inode holds a weak pointer to shared file data. This contains
physical addresses of pages for inode file data. Physical addresses
are allocated and read on demand.

When last shared mapping is unmapped. The inodes shared data is freed
and written to the inode.
 2023-09-29 18:59:20 +03:00
Bananymous 8ff4e1f8c8 Kernel: Don't write to stat_loc on SYS_WAIT if it is null 2023-09-29 18:31:44 +03:00
Bananymous 7b1c573ad0 Kernel: Implement MAP_PRIVATE file mappings 
mmap() now supports mapping files with MAP_PRIVATE.
 2023-09-29 17:23:42 +03:00
Bananymous 4ee759aa3b Kernel: Implement new abstract MemoryRegion 
MemoryBackedRegion now inherits from this and is used for private
anonymous mappigs. This will make shared mappings and file backed
mappings much easier to implement.
 2023-09-29 16:18:23 +03:00
Bananymous 16eb055737 Kernel: Add some sanity assertions/functions 2023-09-29 02:03:19 +03:00
Bananymous a34f2e6e0d Kernel: Use the new on demand ELF structure 
All executable files are now read from disk and paged on demand.
This was a big rewrite of the old ELF library but in the end
everything seems much cleaner, since all the old functionality was
not actually needed for execution.

I have to do some measurements, but I feel like memory usage dropped
quite a bit after this change.
 2023-09-29 02:00:10 +03:00
Bananymous 5b6569f2c9 Kernel: Fix off by one error when calculating pages in range 2023-09-29 01:56:15 +03:00
Bananymous 58f4ed22c4 Kernel: Don't map interrupt stack as userspace accessable 2023-09-28 21:58:24 +03:00
Bananymous 245f58cc3a Kernel: mmap regions are now demand paged 
mmap will not actually take any memory unless you use the given
memory.
 2023-09-28 21:07:14 +03:00
Bananymous d9a5e471f5 Kernel: Remove duplicate code in VirtualRange::create_to_vaddr_range 2023-09-28 13:59:49 +03:00
Bananymous d7ecf94347 Kernel: Reboot will now always succeed 
If acpi reset fails, we forcefully trigger a triple fault to restart
the system.
 2023-09-28 13:53:03 +03:00
Bananymous 6eda65eea6 Kernel/LibC/Userspace: Add SYS_POWEROFF + cli tool 
You can now shutdown/reboot banan-os with the poweroff cli tool.

Reboot doesn't seem to work on qemu.
 2023-09-28 12:36:47 +03:00
Bananymous d45bf363f1 Kernel: Enter ACPI mode with lai 2023-09-28 12:30:27 +03:00
Bananymous 3b283cb860 Kernel: Make tty overload correct has_data() function 
This allows snake game to work again :)
 2023-09-28 11:54:12 +03:00
Bananymous cb76f1ea75 Kernel: Add some functionality to disable TTY input/output 
Userspace programs can call tty_ctrl() to disable/enable tty from
handling input and displaying output.

This API is probably going to change in the future to ioctl calls
but I'm not sure how ioctl is used and what functionality should it
have. I decided to create whole new function and syscall for now.

Next I will expose framebuffer in /dev/fb0 and then I can start work
on graphical environment! :D
 2023-09-27 15:44:05 +03:00
Bananymous 459afef89e Kernel: Disable DiskCache sync messages 2023-09-27 14:12:21 +03:00
Bananymous 1c26a402b0 Kernel: Add missing TRY() to font loading 2023-09-27 00:49:53 +03:00
Bananymous 1e6930a3bc Kernel: SYS_SYNC now schedules sync to happen soon 
You can pass non-zero argument to the syscall to block until the
sync has finished.
 2023-09-27 00:34:00 +03:00
Bananymous 11db49e2d3 Kernel: DiskCache now requires sync to be called from kernel thread 
This disables the scenario where user interrupts sync operation
possibly leaving the syncing in invalid state.
 2023-09-27 00:32:13 +03:00
Bananymous c33e658f98 Kernel: Allow creationg of empty processes and manual registration 
You can now create kernel processes without any threads, add the
needed threads and only then register the process and its threads
to the scheduler.
 2023-09-27 00:29:45 +03:00
Bananymous 22252cfcf0 Kernel: All syscalls now validate users pointers 
We now validate pointers passed by the user, to forbid arbitary
memory read/write. Now the user is only allowed to pass in pointers
in their own mapped memory space (or null).
 2023-09-25 22:07:12 +03:00
Bananymous 976114fde1 Kernel: Print more detailed output on ISR 2023-09-25 20:33:07 +03:00
Bananymous 9d55cf1d80 Kernel: Ext2 inodes are now stored in cache 
This allows faster inode access and ensures working inodes when
opened in multiple places.
 2023-09-25 20:31:40 +03:00
Bananymous 669b2ace4e Kernel: Ext2 filesystem now holds 10 preallocated block buffers 
Inodes can query blocks from this buffer. This allows allocation of
blocks to not fail during normal operations. Also less stress on
kmalloc.
 2023-09-25 14:32:25 +03:00
Bananymous 0e67c6318b Kernel: Fix ext2 block allocation 
Redo ext2 block allocation. This is now much "cleaner" although
I'm not too fond of the macros.
 2023-09-25 13:17:44 +03:00
Bananymous ffa80d0466 Kernel: Hacky kmalloc quick fix 
Remove GeneralAllocator from kmalloc as it is not CriticalScope safe.
This requires increasing kmalloc memory.
 2023-09-25 13:13:57 +03:00
Bananymous e7ca83ecb2 Kernel: VirtualRange doesn't store physical addresses of pages 
This was unnecessarry allocation, since the page table allready
contains virtual address -> physical address mappings.
 2023-09-24 01:29:34 +03:00
Bananymous f6261e5dc9 Kernel: all mapped ranges are now stored in one container 
We just now have a flag if a mapping is unmappable
 2023-09-23 23:45:26 +03:00
Bananymous d1bbbf48f6 Kernel: Fully remove sys_alloc and sys_free 
I could delete the whole FixedWidthAllocator as it was now obsolete.
GeneralAllocator is still used by kmalloc. Kmalloc cannot actually
use it since, GeneralAllocator depends on SpinLock and kmalloc runs
without interrupts.
 2023-09-23 03:53:30 +03:00
Bananymous 3ba15b41a3 Kernel/LibC: remove PATH resoltion from kernel 
I have no idea why I had made PATH environment variable parsing
to be part of the kernel. Now the shell does the parsing and
environment syscall is no longer needed.
 2023-09-23 03:08:14 +03:00
Bananymous 7a7c5e433e Kernel/LibC: add flag to enable/disable sse support 
SSE support is very experimental and causes GP. I decided to make
SSE not default until I get to fixing it :)
 2023-09-23 02:28:25 +03:00
Bananymous 6bb2c80bdd Kernel/LibC: userspace malloc now uses mmap to get memory 
We could remove syscalls to allocate more memory. This was not
something the kernel should have done.
 2023-09-23 02:26:23 +03:00
Bananymous af4af1cae9 Kernel/LibC: add mmap for private anonymous mappings 
This will be used by the userspace to get more memory. Currently
kernel handles all allocations, which is not preferable.
 2023-09-22 23:01:14 +03:00
Bananymous 83b165ebb0 Kernel: Add constexpr conditional debug prints 2023-09-22 17:20:35 +03:00
Bananymous c5f9f0c307 Kernel: Add LAI as a dependency 
I did not feel like implementing AML interpreter now, and wanted
everything AML has to offer. I will be writing my own AML interperter
at some point.
 2023-09-22 17:20:35 +03:00
Bananymous 9d827037ca Kernel: Fix timer includes 2023-09-22 17:20:35 +03:00
Bananymous 58506c5bd1 Kernel: Add config read/write api to PCI 2023-09-22 17:20:35 +03:00
Bananymous dd0b8c4140 Kernel: Add pointer validation API to page table 2023-09-22 17:20:35 +03:00
Bananymous 11717f90c1 Kernel: PCI devices can now create region for BAR 
This creates either MEM or IO region for read/write access to PCI
device.
 2023-09-22 17:20:35 +03:00
Bananymous a740bf8df4 1000th COMMIT: Kernel: Add basic E1000 driver 
This driver is only capable to read mac address and enable and read
link status
 2023-09-22 17:20:28 +03:00
Bananymous 63dc2b6aa6 Kernel: Implement SYS_SYNC and add sync executable to userspace 
You can (and have to) manually sync disk after writes to it.
 2023-09-11 01:26:27 +03:00
Bananymous eee0537053 Kernel: Writes to disk are not synchronous anymore 
Implement "proper" DiskCache syncing
 2023-09-11 01:25:16 +03:00
Bananymous 7ec860a3d4 Kernel: Print stack trace on isr 2023-09-11 01:20:55 +03:00
Bananymous 9b9a6b2cfc Kernel: Fix ext2 file write 2023-09-11 01:20:39 +03:00
Bananymous 8fb5f97a18 Kernel: Improve open() POSIX compatability 
Also rename Process::sys_creat -> create_file since it is not
actually a syscall and only used by open as a healper.
 2023-09-10 00:31:42 +03:00
Bananymous 921d95d18f All: Clear lines with only whitspace in them 2023-09-10 00:31:42 +03:00
Bananymous 1fcf122c50 Kernel: Add basic ZeroDevice to /dev/zero 2023-09-10 00:31:42 +03:00
Bananymous dd9af56e21 Kernel: Start work on making inodes more thread safe 
All inode operations are now locked and thread blocked
 2023-09-10 00:31:42 +03:00
Bananymous 39a5c52088 Kernel: Fix directory permissions 
We did not care about X bit in directories and instead used only the
R bit for search/read.
 2023-09-08 11:46:53 +03:00
Bananymous 660f7cbfeb Kernel: Ext2 directories can allocate new blocks if needed 2023-09-08 10:29:26 +03:00
Bananymous 1abf54d652 Kernel: Fix bug in disk writing 
I have used two weeks in locating a bug in my ext2 implementation
while the bug was actually in disk write. If you called write_sectors
on disk it would write the first sector_size bytes repeatedly to all
asked sectors and this corrupted the disk...
 2023-09-08 02:43:08 +03:00
Bananymous 3750d29b2b Kernel: Fix possible out-of-bounds disk access in ext2 2023-09-08 02:42:53 +03:00
Bananymous 4648f6718e Kernel: Cleanup TTY::read() 2023-09-07 15:27:21 +03:00
Bananymous b30af0edca Kernel: TTY now reads input byte by byte 
This allows correct behaviour for character streams / keyboard
handling. Serial input can now send working ^C :D
 2023-09-07 15:06:27 +03:00
Bananymous 5e1725abb2 Kernel: Remove bitmap debug printing from ext2 inode allocation 2023-09-06 01:25:09 +03:00
Bananymous 6ad2f23259 Kernel: Correct inode links count 2023-09-05 14:46:56 +03:00
Bananymous ba7e1b9ca5 Kernel: Add /dev/tty symlink that targets the current tty 2023-09-05 01:07:52 +03:00
Bananymous f0772e385c Kernel: Implement basic RamSymlinkInode 2023-09-05 01:07:52 +03:00
Bananymous 3fd94b1acb Kernel: You can now read serial output from the /dev/ttyS* 2023-09-05 01:07:52 +03:00
Bananymous 93c5755012 Kernel: Receive interrupts for COM1 and COM2 input 
The input has to still be attached to terminal
 2023-09-04 22:07:40 +03:00
Bananymous 323de3c866 Kernel: Rework whole Terminal structure 
Serial monitors can now be used as a output. This requires editing
init code for the stdio opening. Serial input is not supported, so qemu
still needs graphical window for ps/2 keyboard.
 2023-09-04 19:34:18 +03:00
Bananymous 52b9fddfd7 Kernel: Make serial devices to their own class 2023-09-04 14:57:05 +03:00
Bananymous 04cfbca336 Kernel: Add ANSI support for hiding/showing cursor to TTY 2023-09-04 14:30:09 +03:00
Bananymous 9901f95d78 Kernel: Add basic nanosleep, only millisecond percision 2023-09-04 12:59:50 +03:00
Bananymous b2139c0b1e Kernel: Add basic support for O_NONBLOCK (only for tty) 2023-09-04 12:57:52 +03:00
Bananymous 6f002c926a Kernel: add basic fcntl() with couple of commands and no validation 2023-09-04 12:57:09 +03:00
Bananymous a711462ef4 Kernel: Split ext2 implementation to multiple files 2023-09-01 15:10:23 +03:00
Bananymous f31c6b847f Kernel: Start work on writable ext2 filesystem 2023-08-31 23:40:31 +03:00
Bananymous 195ccf4f53 Kernel: Add missing ififo() to Inode::Mode 2023-08-31 21:38:31 +03:00
Bananymous 073edd0b8e Kernel: Stack trace dumping validates pointers before using them 2023-08-31 21:36:23 +03:00
Bananymous 250789aa20 Kernel: better handle kernel errors 2023-08-29 00:13:21 +03:00
Bananymous 8032824054 BuildSystem: use -a with rsync 
This allows cmake to not rebuild whole project every time
 2023-08-28 11:38:17 +03:00
Bananymous 80e7a89f67 BuildSystem: Base sysroot is now distributed as a tar ball 
This allows file and directory permissions work as intended.

cmake is now filled with 'sudo' but with sudo timeout this should be
fine.
 2023-08-23 10:38:21 +03:00
Bananymous 38e72019c7 Kernel: kill() with negative pid actually matches pgid 2023-08-22 14:54:15 +03:00
Bananymous d745fca86a Kernel: Process keeps track if forked process has called exec*() 2023-08-22 14:53:46 +03:00
Bananymous 60a2185ee6 Kernel/LibC: implement proper getpgid and setpgid 2023-08-22 14:53:12 +03:00
Bananymous d634fec8dc Kernel: Add function to enumerate processes in session 2023-08-22 14:52:28 +03:00
Bananymous c9243f0d1e Kernel/LibC: Add {get,set}pgrp() 2023-08-22 11:36:33 +03:00
Bananymous 0f6c19a1b7 Kernel: Barebones implementation sessions and process groups 2023-08-22 11:35:40 +03:00
Bananymous 79f3aa5419 Kernel/LibC: add dup() syscall and function 2023-08-17 12:03:29 +03:00
Bananymous 871c792976 Kernel: O_SEARCH doesn't require any permissions 
Except read permissions for all directories in the path

This allows us to stat e.g. device files for which we don't have
the permissions.
 2023-08-11 12:26:07 +03:00
Bananymous 8480ffe108 Kernel: open() now validates file access mode 2023-08-11 11:53:38 +03:00
Bananymous e1400f9680 Kernel: Remove unused syscall 2023-08-11 11:43:48 +03:00
Bananymous 6e5bce3c57 Kernel: Zero initialize threads sse_storage 2023-08-11 00:26:43 +03:00
Bananymous f75adab9d8 Kernel: Move structures in boot.S to .data section 2023-08-11 00:26:12 +03:00
Bananymous 5d0a6e7b08 Kernel: HPET is now used in legacy mode when PIC is forced 2023-08-10 22:01:30 +03:00
Bananymous b0c8a9cdc4 Kernel: Fix slave PIC 
we dont mask interrupt 2 in PIC since it corresponds to the
slave PIC. Also cleanup PIC code :)
 2023-08-10 21:52:31 +03:00
Bananymous ebe0adb3b5 Kernel: HPET doesn't use the legacy mapping anymore 2023-08-10 21:08:32 +03:00
Bananymous 4842d5e2b9 Kernel: APIC now uses MMIO namespace functions for mmio 2023-08-10 21:07:23 +03:00
Bananymous 0b8396b1a6 Kernel: IDT now sends EOI for every interrupt 
EOI is sent before calling the interrupt handler. This should be fine
since all interrupts are processed with interrupts disabled
 2023-08-09 09:57:02 +03:00
Bananymous 55ef793a74 Kernel: Validate HPET tick period 2023-08-09 09:50:38 +03:00
Bananymous 96c0ad0d3d Kernel: Remove get_unix_timestamp from SystemTimer 
Kernel now uses the percise real_time() and time_since_boot()
 2023-08-09 08:57:50 +03:00
Bananymous 6fcb191ca0 Kernel: Add PageTable::Flags::CacheDisable 
Also fix multiple places where we were using uint8_t as page table
flags instead of PageTable::flags_t which we promoted to uint16_t
while back.
 2023-08-06 23:59:30 +03:00
Bananymous 3df97c36e6 Kerne: SystemTimer can now output the current real time 2023-08-04 16:06:47 +03:00
Bananymous c732297623 Kernel: Rename TimerHandler to SystemTimer 
I changed SystemTimer to only handle the "best" supported timer
it can initialize.
 2023-08-04 16:06:47 +03:00
Bananymous ca5a097ef5 Kernel: Add function to retrieve boot time as timespec 2023-08-04 16:06:47 +03:00