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Author SHA1 Message Date
Bananymous 3ca623349a BAN: Add {TRY,MUST}_REF for references 
It is annoying that we have to have separate macros for these but
I can't find a way to cleanly return lvalue reference from statement
expression. Currently we cast the reference to pointer and return
unreference the pointer outside of the expression.

This feature will probably not be used any time soon, but atleas
it is implemented if I need it one day
 2023-04-19 00:31:15 +03:00
Bananymous 121f4bc1dd BAN: TRY and MUST macros use rvalue references 2023-04-19 00:11:15 +03:00
Bananymous 8e31ef9905 BAN: Add specialization for ErrorOr<LValueReference> 
ErrorOr can now return a reference :)
 2023-04-18 22:02:47 +03:00
Bananymous 2c52e0aad8 BAN: Variant with reference now supports copy/assign 2023-04-18 20:21:23 +03:00
Bananymous 06916f56be BAN: Variant now works with references 
References can be assigned with the set() method. Construction nor
assigment operators cannot be used with references to avoid ambiguity
with what assignment to reference does.

You can set the underlying reference with the set() method and access
it with the get() method.

The references are stored as pointers to the object under the hood
which means that size of a reference is sizeof pointer.
 2023-04-18 19:53:34 +03:00
Bananymous c3df0bd15e BAN: Variant::set now copy/move assigns when possible 2023-04-18 19:10:22 +03:00
Bananymous b41a8e2829 BAN: Variant now has variadic template types 2023-04-18 18:29:48 +03:00
Bananymous 96ac072166 Kernel: Heap allows us to take free pages. 
The API is kinda weird and will probably be reworked in near future
but this will work for now :)
 2023-04-18 10:18:15 +03:00
Bananymous 295a27f16a Kernel: Panic wont print stacktrace if it has already paniced 
This prevents stack trace dump to panic and loop
 2023-04-18 10:18:15 +03:00
Bananymous 88f60b5e41 Kernel: Map all ACPI tables on initialization 
This makes their usage much easier and less error prone

They won't mapped be processes when we get to there, so this won't be
a problem
 2023-04-18 10:18:15 +03:00
Bananymous 1c22e90fa0 Scripts: remove disk build from install-usb.sh 
You can still use the install-usb.sh script from the build directory.
 2023-04-18 10:18:15 +03:00
Bananymous d23604b0d5 Kernel: Handle some Heap edge cases 2023-04-18 10:18:15 +03:00
Bananymous c5347e6707 Kernel: Reorder boot initialization 
We now create the TTY as soon as possible so we can show console
output without serial port.
 2023-04-18 10:18:15 +03:00
Bananymous bf0c7b9ae8 Kernel: Heap implementation can now give free pages from all of RAM 2023-04-18 10:18:15 +03:00
Bananymous 0374b68fa1 Kernel: Remove unused file 2023-04-18 10:18:15 +03:00
Bananymous 633929629c Kernel: Start working on heap 2023-04-18 10:18:15 +03:00
Bananymous 6a3b3213cf Kernel: Kmalloc now has its memory statically allocated 
We don't use the memory map given by bootloader since this automatically
maps the memory to a available space.
 2023-04-18 10:18:15 +03:00
Bananymous fdb4eb6042 Kernel: Move kmalloc and MMU to Memory directory 2023-04-18 10:18:15 +03:00
Bananymous 998ae511a3 LibELF: Start implementing elf library 2023-04-18 10:18:15 +03:00
Bananymous 3f9d6f0311 LibC: add needed stubs to build executables with our compiler 2023-04-12 17:53:02 +03:00
Bananymous 8ee63f8264 Kernel: We can create basic userspace processes 
These are still allocated on the kernel memory
 2023-04-12 17:52:36 +03:00
Bananymous 34358b8471 Kernel: Scheduler can now terminate processes threads 2023-04-12 17:49:04 +03:00
Bananymous 5b1af4ec47 Kernel: Debug::dump_stack_trace now 'detects' repeating function 2023-04-12 01:32:41 +03:00
Bananymous 071d7af58a Kernel: kmalloc does not check for corruptiong unless it cannot allocate 
We 'don't care' if kmalloc is corrupted unless it prevents us from
allocating memory. Scheduler should be catching stack overflows either
way and is much more efficient
 2023-04-12 00:24:02 +03:00
Bananymous 3201c3654e Kernel: Threads now use only 4 KiB stack :) 2023-04-12 00:22:08 +03:00
Bananymous 6ed3023725 Kernel: Fix TTY spinlock usage 2023-04-12 00:20:04 +03:00
Bananymous 892a63aec5 Kernel: Shell TTY_PRINT is now function instead of macro 
This makes functions uses way less stack
 2023-04-12 00:18:58 +03:00
Bananymous 3fe889d4a4 BuildSystem: GCC will now complain on functions with 1 KiB stack 2023-04-12 00:18:06 +03:00
Bananymous c35e7368f2 BAN: Variant now aligns its data properly 2023-04-12 00:17:45 +03:00
Bananymous cafd546ce8 Kernel: kmalloc now detects corruption 
Kmalloc checks if its nodes have corrupted. This was happening
because of stack overflow.
 2023-04-11 23:36:46 +03:00
Bananymous 5810a77cbf Kernel: Mark Scheduler::start() as noreturn as appropriate 2023-04-11 23:33:20 +03:00
Bananymous 6f7045ead2 Kernel: kernel doesn't allocate large blocks of data on stack 
We used to allocate 1 KiB blocks on multiple places on stack. This
is a problem, since kernel stack shouldn't have to be too big
 2023-04-11 23:31:58 +03:00
Bananymous 40f9a42c00 Kernel: Scheduler will panic if it encounters stack overflow 2023-04-11 23:29:21 +03:00
Bananymous 9abe1f27bb Kernel: Process now locks the mutex while modifying open files 
This allows processes to be actually removed from the list instead
of dead locking
 2023-04-11 23:28:16 +03:00
Bananymous aa2aee684b Kernel: remove message from BAN::Error 
We don't store the error message anymore in BAN::Error.
Instead we store a error code that can be mapped into a string.
This allows BAN::Error to only take 4 bytes instead of 128.

We should also make some kernel initialization just panic instead
of returning errors since they are required for succesfull boot
anyway.
 2023-04-11 23:25:21 +03:00
Bananymous cfa025acae BAN: Move RefPtr to its own file and create New.h 
New.h contains definitions for placement new operators and
BAN::allocator and BAN::dealloctor
 2023-04-10 21:07:25 +03:00
Bananymous 781cc78a1f BuildSystem: Fix header copying to sysroot 
We used to copy all headers everytime to sysroot which caused
rebuild of the whole os. Now we use the cmake command
'copy_directory_if_different' which seemed to fix this issue :)
 2023-04-10 21:07:25 +03:00
Bananymous f924ac9265 Kernel: Threads can now be terminated mid execution 2023-04-10 21:07:25 +03:00
Bananymous df6e8a6562 Kernel: Add small wait in ATA driver before reading/writing 
This allows bochs to boot again
 2023-04-10 21:07:25 +03:00
Bananymous 3f01f936a1 Kernel: Fix framepointers on started threads 2023-04-10 21:07:25 +03:00
Bananymous 25ddc24754 BuildSystem: cmake can now build out libc 
I can't seem to get libc++ build to work...
 2023-04-10 21:07:25 +03:00
Bananymous 989f9ec5fe LibC: remove old unused files 2023-04-07 02:26:44 +03:00
Bananymous 3fbee2c835 BuildSystem: remove now obsolete include directories from kernel build 2023-04-07 02:25:47 +03:00
Bananymous 77e94e1d3b General: Write basic README 2023-04-06 20:59:45 +03:00
Bananymous 4a3bfaff90 Scripts: linecount does not count lines from toolchain/ 2023-04-06 20:31:10 +03:00
Bananymous 2a8dc58b6a BuildSystem: Cleanup cmake code 
The buildsystem is kind of a mess. I will be writingn build
instructions soon.
 2023-04-06 20:31:10 +03:00
Bananymous 8a8793fd2d BuildSystem: you can now build the toolchain with cmake 2023-04-06 00:23:02 +03:00
Bananymous 7ab9e420ac Update .gitignore 2023-04-06 00:02:47 +03:00
Bananymous 43ca62de47 BuildSystem: Create script for os specific toolchain 2023-04-06 00:02:13 +03:00
Bananymous a5830c5424 LibC: add stubs for a lot of functions 2023-04-05 23:58:40 +03:00
Bananymous b6896a6d85 LibC: sys/types uses 'typedef' instead of 'using' 2023-04-05 15:03:24 +03:00
Bananymous 9e0b4132ee Kernel: Shell now somewhat functions again 
I will not be fixing the shell implementation until I get to
userspace
 2023-04-05 11:37:41 +03:00
Bananymous 68158324f4 Kernel: Fix TTY echo and canonical flag behaviour 2023-04-05 11:35:19 +03:00
Bananymous a420be6b20 Kernel: Fix ansi control sequence cursor movement 2023-04-05 03:07:52 +03:00
Bananymous f281543255 Kernel: Add tty to process and make termios modifiable 2023-04-05 02:53:28 +03:00
Bananymous 67ff01e915 LibC: Add errno ENOTTY 2023-04-05 02:47:37 +03:00
Bananymous dcf0969e2d Kernel: TTY now supports clearing 2023-04-05 02:04:18 +03:00
Bananymous 4f522d337a Kernel: Add partial support for shell 
We don't handle arrow keys, and the tty does not know how to clear
the screeen :D
 2023-04-05 01:30:58 +03:00
Bananymous af0979ec32 Kernel: Process can now initialize stdio 
This allows the use of the fds STD{IN,OUT,ERR}_FILENO
 2023-04-05 01:10:25 +03:00
Bananymous 63e863ad35 LibC: Add unistd.h with STD{IN,OUT,ERR}_FILENO definitions 2023-04-05 00:59:48 +03:00
Bananymous 7f95444bb5 Kernel: Start work on making tty a file 
TTY is now a file that you can read from/write to. I still have
to port shell to use this new interface
 2023-04-05 00:56:09 +03:00
Bananymous 783842bac2 Kernel: add virtual write function to inode 2023-04-03 20:29:07 +03:00
Bananymous e1534ad25b Kernel: Fix keys in PS2Keymap 2023-04-03 20:25:23 +03:00
Bananymous ee1f3623ce Kernel: Fix typo 2023-04-03 19:56:55 +03:00
Bananymous dffdb51713 BuildSystem: remove non-existent file from kernel CMakeLists.txt 2023-04-03 19:02:25 +03:00
Bananymous daa35aaf7d BAN: Add data() member function to Array 2023-04-03 17:00:52 +03:00
Bananymous b87dae7e7c Kernel: Device dev and rdev number is done more properly 
Also hd* partitions are now 1 indexed instead of 0
 2023-04-03 11:43:16 +03:00
Bananymous 86d777e2eb LibC: add device macros in sys/sysmacros.h 2023-04-03 10:59:15 +03:00
Bananymous 2ffee63889 Kernel: Cleaner partition parsing errors 2023-04-03 09:55:49 +03:00
Bananymous c936aac777 Kernel: Optimize scheduler idling 
Now after each interrupt we will ask the scheduler to reschedule
if the current thread is the idle thread. This allows semaphore
unblocking to be practically instant when there is only one thread
executing.

Now disk reading is back to ~3 MB/s for single threaded process
 2023-04-03 01:51:05 +03:00
Bananymous 46d65471d9 Kernel: ATA now uses irqs instead of polling 
Reading is now much slower at ~500 kB/s it was around 3 MB/s.
This is probably mostly due semaphore blocking taking atleast
until next reschedule (1 ms itervals). This will be a problem
as long as we are using only single processor.

I could try to use {READ/WRITE}_MULTIPLE commands, but since
most of the disk reads are 2 sectors (inode block size) this
will at most double the speed.

Most efficient speed up would of course be caching disk access
data and inodes overall.
 2023-04-03 00:03:38 +03:00
Bananymous dcc174b62e Kernel: Move ATADevice to its own file from ATAController 
The API is kinda weird since device reads/writes go from
ATADevice -> ATAController -> ATADevice
but this is for now atleast necessary since ATAController has(?)
to keep all devices from using the disks at the same time
 2023-04-02 18:26:19 +03:00
Bananymous bdc7a99c59 Kernel: ATA controller waits now before read/write until disk is ready 
Qemu used to freeze on disk writes but now it seems fine
 2023-04-02 05:37:17 +03:00
Bananymous 2aad357c18 BuildSystem: building for 32-bit works now 2023-04-02 05:03:17 +03:00
Bananymous ccf51cec5c Scipts: linecount doesn't count lines in build/ 2023-04-02 04:09:54 +03:00
Bananymous 4c5176f751 BuildSystem: We are now using cmake instead of plain make 
I have been annoyed for a while since I had to build everything
when running the os since the buildsystem was really bad.

I wanted to rewrite the whole build system and changed to using cmake

:)
 2023-04-02 04:07:27 +03:00
Bananymous d71f1f24e4 LibC: Combine string.h functions definitions to single file 2023-04-02 00:00:29 +03:00
Bananymous cbb0f6be9a Kernel: cleanup includes 
I went quickly went through all files since I found some weird
includes :D
 2023-04-01 02:14:49 +03:00
Bananymous a60f8098ee Kernel: Fix traversing back from mount points 2023-04-01 01:54:35 +03:00
Bananymous 8bffbf64b9 Kernel: Add inodes '.' and '..' to device manager 2023-04-01 01:33:04 +03:00
Bananymous d91a5bccf4 Kernel: Reads return 0 bytes read at the end of device 
We used to not have any idea if we where already at the end of device.
Also fixed couple of copy-paste errors from read->write
 2023-04-01 00:55:07 +03:00
Bananymous 1ca0d3a3c1 Kernel: Shell cleanup cat command 2023-04-01 00:54:39 +03:00
Bananymous 653f688567 Kernel: Shell 'time' prints the time even if command fails 2023-04-01 00:30:33 +03:00
Bananymous 8b5d8d9f8a Kernel: Process gets absolute paths for mount 2023-04-01 00:30:11 +03:00
Bananymous c45ada6ccb Kernel: fix ext2 failed creation memory leak 2023-04-01 00:22:03 +03:00
Bananymous db65cfeb8a Kernel: Cleanup ATA device initialization 2023-03-31 00:58:57 +03:00
Bananymous a3ba6da6f3 Kernel: Move DeviceManager to its own file 2023-03-30 22:39:45 +03:00
Bananymous b048630e5b Kernel: Improve locking in Process, VFS and ATAController 
We used to block on all process access. This meant that shell
reading the keyboard input would block all VFS access making disk
accesses practically impossible. We now block only when it is
necessary :)
 2023-03-30 22:02:16 +03:00
Bananymous dcee92a6bc Kernel: Thread is no longer RefCounted 
This makes developement with Scheduler much easier against compiler
optimizations. I could now remove the pragma GCC optimize stuff.
 2023-03-30 19:16:51 +03:00
Bananymous c2e3b422cc Kernel: Add Semaphore to block threads 2023-03-30 18:46:33 +03:00
Bananymous 7b7f4eb141 BAN: LinkedList::remove now returns iterator to the element after 2023-03-30 18:46:19 +03:00
Bananymous d4c03d3939 Kernel: root partition is now passed from the commandline 2023-03-30 18:46:19 +03:00
Bananymous 5d459130a7 BAN: StringView::split(char, bool) is now thread safe 
I had to duplicate some code, but this is better since I would like
to not use BAN::Function for something like this
 2023-03-30 16:35:38 +03:00
Bananymous 8e68d2e3ea Kernel: Shell can now mount partitions 2023-03-30 15:06:41 +03:00
Bananymous 30c33b55e3 Kernel: Inode::Mode is now a struct so we can have functions in it 2023-03-30 14:41:15 +03:00
Bananymous e2791e5260 Kernel: StorageDevices and Controllers are now devices 2023-03-30 14:22:15 +03:00
Bananymous 88a8bd659d Kernel: Add IFBLK, IFLNK, IFSOCK to Inode::Mode 2023-03-30 13:15:46 +03:00
Bananymous f9cc114907 Kernel: All devices have atime, mtime, ctime at their creation 2023-03-30 13:15:46 +03:00
Bananymous 9a4d603a62 Kernel: Remove the mount test from VFS 2023-03-30 11:43:24 +03:00
Bananymous 78ea4b2207 Kernel: fix stat command and device numbers 2023-03-30 10:43:08 +03:00