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456 Commits

Author SHA1 Message Date
Bananymous 12e42f40c5 Kernel/LibC: add free function for FixedWidthAllocator 
I have to rework the syscall API and allocators in process. For
now this works well enough :)
 2023-05-07 01:21:50 +03:00
Bananymous 890aa9aa15 BuildSystem: linker -O2 doesn't do anything? hopefully 2023-05-06 19:58:08 +03:00
Bananymous bcfd838131 Kernel: Add basic fixed width allocator for userspace 
We have to move process stacks to the general heap and maybe map
kernel to higher half.
 2023-05-06 19:58:08 +03:00
Bananymous 9c07add00f Kernel: Invalid physical addresses from heap are specified now by 0 2023-05-06 17:34:22 +03:00
Bananymous ab8aac7dcf Kernel: GDT tss selector is now 16 bit value 2023-05-06 17:34:22 +03:00
Bananymous f36b94d039 Kernel: MMU can now provide info about virtual address space 2023-05-06 17:34:22 +03:00
Bananymous 92daa831d1 Kernel: ISRs now print pid and tid 2023-05-06 00:10:15 +03:00
Bananymous e7a170c89f Kernel: 64 bit MMU now properly identity maps kernel 2023-05-05 14:19:28 +03:00
Bananymous 3c5d3eb8ad Kernel: TTY input process is now single instance 
Process sends key events to the active (currently only) tty
 2023-04-30 16:11:14 +03:00
Bananymous 55bb0084aa Kernel: namespace and function renames 
MMU moved to namespace kernel
Kernel::Memory::Heap moved to just Kernel
MMU::map_{page,range} renamed to identity_map_{page,range}

Add MMU::get_page_flags
 2023-04-28 14:48:38 +03:00
Bananymous acf5660090 Kernel: Add set_tss_stack() to 32 bit 2023-04-28 14:44:23 +03:00
Bananymous 9d7530662f Kernel: dprintln file name is now relative 
This makes file names much shorter
 2023-04-28 14:43:19 +03:00
Bananymous a22caa38d2 Kernel: Scheduler updates tss stack on thread execution 2023-04-25 14:49:50 +03:00
Bananymous dc0f8b383f Kernel: Usespace threads now have an interrupt stack 2023-04-25 14:49:18 +03:00
Bananymous f1a0625b61 Kernel: TSS stack can be set after initialization 2023-04-25 14:48:12 +03:00
Bananymous 02b961fd7e Kernel: Stack pointer out of bounds now panics with a message 2023-04-25 13:40:55 +03:00
Bananymous 6e01e04922 Kernel: Fix bug in Process::create_userspace() 
We used to write more than we needed to. This could lead to unwanted
page faults
 2023-04-25 13:21:28 +03:00
Bananymous b7c2ea8d46 Kernel: Fix possible dead lock in Process::read() 2023-04-23 14:46:18 +03:00
Bananymous cd74b2167d LibC: Write mostly functioning stdio 2023-04-23 14:32:37 +03:00
Bananymous 9b2a577fc3 Kernel: Add ASSERTion to Process::exit() 
This is just so I don't forget that exit can currently only
be called on the executing thread itself
 2023-04-22 19:05:27 +03:00
Bananymous 2dd09163e6 Kernel: Process can now load 32 bit elf files on i386 
We are page faulting on process exit but I'm investigating
the reason.
 2023-04-22 19:03:30 +03:00
Bananymous fb6add2b4a Kernel: Fix 32 bit MMU 2023-04-22 18:22:39 +03:00
Bananymous 48445f12ac Kernel: More proper paging in Elf loading 2023-04-22 18:17:44 +03:00
Bananymous 792fad2a03 Kernel: d{print,warn,error}ln(...) now has a spinlock 2023-04-22 17:58:51 +03:00
Bananymous cc04990ce3 Kernel: Process now frees up its pages on destruction 2023-04-22 16:54:46 +03:00
Bananymous 7530482cc2 Kernel: Cleanup process creation for userspace 2023-04-22 16:51:50 +03:00
Bananymous 33d8c518e9 Kernel: Fix some deadlocks in the Process 2023-04-22 16:19:57 +03:00
Bananymous e0ce2394fe Kernel: Remove obsolete userspace stuff from kernel 2023-04-22 15:38:45 +03:00
Bananymous fadce063a7 Kernel: Usespace programs are now ran through ELF files 
only 64 bit elf files are supported for now.
 2023-04-22 15:35:32 +03:00
Bananymous 26fe6ad898 Kernel: kmalloc does not dump stack trace 
dump_stack_trace() page faults and i dont feel like debugging this
now :)
 2023-04-21 13:45:13 +03:00
Bananymous fc71d2f7c4 Kernel: Don't call 'cli' on interrupt 
This is automatically done because we are using interrupt gates
in the IDT
 2023-04-21 11:18:08 +03:00
Bananymous 35e949ef5e Kernel: Fix syscall return value in 32 bit 2023-04-21 11:08:02 +03:00
Bananymous 9c506ef85b Kernel: Stack pointer is validated when updated 
This allows us not to fail stack pointer when in syscall since
interrupts use their own stack
 2023-04-21 10:40:24 +03:00
Bananymous b1c7af38d0 Kernel: Add barebones per process virtual addresses 
We now assign every (userspace) process its own MMU which we load
in scheduler. This allows every process to have separate virtual
address space.

This is very hackish implementations but it works for now
 2023-04-20 00:45:41 +03:00
Bananymous ea0c9b639f Kernel: Add some bareboness functionality to map virtual addresses 2023-04-19 23:51:36 +03:00
Bananymous 0030f035be Kernel: Rename MMU::{un,}allocate... to MMU::{un,}map 
This is more appropriate name for the behaviour :D
 2023-04-19 21:50:30 +03:00
Bananymous c26529ae86 Kernel: kmalloc will always print debug on failed alloc 2023-04-19 18:05:01 +03:00
Bananymous e8a0df54b1 Kernel: ATAController will fail to initialize in native mode 2023-04-19 17:29:36 +03:00
Bananymous 33393335c8 Kernel: PCI devices now report their prog_if 2023-04-19 16:43:05 +03:00
Bananymous c5b02bb9f5 Kernel: Shell fix file reading 
We were reading 8 bytes at a time instead of the 1024 we were
supposed to :DD
 2023-04-19 14:09:23 +03:00
Bananymous a1047918d2 Kernel: Shell now has exit() command 2023-04-19 12:53:09 +03:00
Bananymous fd81e31050 Kernel: Fix Process::exit() and where it is called from 
cksum doesn't seem to work anymore on big files. I have to look
into this. It locks up after couple of seconds...
 2023-04-19 12:52:21 +03:00
Bananymous dcce18799f Kernel: We now launch Shell again on boot 
Adding this just before push :D
 2023-04-19 00:41:24 +03:00
Bananymous a9a15ea2c0 Kernel: init2 is now launched as a process instead of thread 
Also only process can now add threads to scheduler. Nobody should
have raw access to scheduler and everything should be through
Process::current() or irqs (reschedules)
 2023-04-19 00:39:06 +03:00
Bananymous d63716db96 Kernel: Process is not reference counted any more 
This was not necessary and it made things needlessly complicated
 2023-04-19 00:34:18 +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 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 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 3fbee2c835 BuildSystem: remove now obsolete include directories from kernel build 2023-04-07 02:25:47 +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 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 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 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 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 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 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