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433 Commits

Author SHA1 Message Date
Bananymous e86e755c51 Kernel: Generally improve signals 2023-07-31 22:28:18 +03:00
Bananymous 6f7d97cf94 Kernel: Remove is_in_syscall from Thread 2023-07-30 14:49:51 +03:00
Bananymous 879706e6e9 Kernel: Signals are not queued anymore 
Posix doesn't require signal queing if you don't use sigqueue() which
we don't support. Process also has its own pending signal mask.
 2023-07-29 16:54:31 +03:00
Bananymous 22cd9af8cc Kernel: Restructure process and thread termination 
When we want to kill a process, we mark its threads as Terminating
or Terminated. If the thread is in critical section that has to be
finished, it will be in Terminating state until done. Once Scheduler
is trying to execute Terminated thread it will instead delete it.

Once processes last thread is marked Terminated, the processes will
turn it into a cleanup thread, that will allow blocks and memory
cleanup to be done.
 2023-07-28 18:06:20 +03:00
Bananymous a9cf9bceef Kernel: Rewrite DiskCache 
We now cache only clean pages since I don't want to think about
syncing the disk later.
 2023-07-27 22:22:39 +03:00
Bananymous 6c0f864a6e Kernel: Locks allow locking after locker is invalid 
SpinLock and RecursiveSpinLock will now allow locking after the initial
locker is invalid. This allows us to kill threads even if they are holding
internal locks
 2023-07-27 18:52:51 +03:00
Bananymous 0f23e1f0f4 Kernel: Scheduler can now check if tid is valid 
Tid can become invalid if the thread is already terminated
 2023-07-27 18:34:06 +03:00
Bananymous 432c296b7b Kernel: Implement SYS_GET_PID and SYS_TCSETPGID 
we don't have consept of process groups yet
 2023-07-24 22:29:59 +03:00
Bananymous b576d373c4 Kernel: TTY now stores foreground process pid 
this will be process pgid when we have process groups
 2023-07-24 22:29:59 +03:00
Bananymous 522aa8e762 Kernel: add Thread::queue_signal() 2023-07-24 22:26:10 +03:00
Bananymous 146802fa4c Kernel: Scheduler can now block threads based on tid 2023-07-24 22:24:21 +03:00
Bananymous cc8af25d73 Kernel: remove Semaphore::is_blocked 
this will not mean anything after semaphores can spuriously wake up
 2023-07-24 22:23:13 +03:00
Bananymous f5f4bf58ad Kernel: add is_tty() to inode 2023-07-24 22:19:59 +03:00
Bananymous 3784da0d18 Kernel: you can now ask process if it is userspace process 2023-07-23 18:54:10 +03:00
Bananymous 9eb72f4392 Kernel: OpenFileDesctiptor can now return inode of fd 2023-07-23 18:52:33 +03:00
Bananymous f7bf6d5e62 Kernel: Change signal kernel API 
return rsp and rip are now stored per thread
 2023-07-23 18:33:10 +03:00
Bananymous adb14ba373 Kernel: Userspace signal handlers are now called one at a time 
I added a syscall for telling the kernel when signal execution has
finished. We should send a random hash or id to the signal trampoline
that we would include in the syscall, so validity of signal exit can
be confirmed.
 2023-07-23 13:34:53 +03:00
Bananymous 2149cec29f Kernel: Make signals more POSIX 2023-07-21 20:01:12 +03:00
Bananymous ad756c36fc Kernel/LibC: Add SYS_KILL/kill() 2023-07-21 19:27:38 +03:00
Bananymous b56316e9da Kernel: Scheduler now sends queued signals 2023-07-21 19:27:10 +03:00
Bananymous a989c44211 Kernel: Make signals thread specific 2023-07-21 19:00:59 +03:00
Bananymous 217e5f81cc Kernel: add default signal actions 2023-07-21 18:02:35 +03:00
Bananymous dcd4d0daeb Kernel/LibC: Add bareboness signals 
You can now call raise() to raise a signal. Signal handlers are
not yet supported, but the handling works :)
 2023-07-21 15:45:02 +03:00
Bananymous 193ddaa2f6 Kernel: remove PAGE_FLAGS_MASK as that was not correct anymore 
After I added NXE bit, the flags mask is no longer valid
 2023-07-21 12:01:50 +03:00
Bananymous 2db7cdb71e Kernel: Syscalls now get the interrupt stack 2023-07-21 11:04:16 +03:00
Bananymous f8a1a10897 Kernel: add NullDevice to /dev/null 2023-07-20 00:06:22 +03:00
Bananymous adbe13938e Kernel: move Device.h to its own directory 2023-07-19 23:55:38 +03:00
Bananymous 98cedf155c Kernel: FixedWidthAllocator creation can now fail 2023-07-19 18:07:24 +03:00
Bananymous c0c0bbc1bf Kernel: SYS_FORK can now fail instead of panicing on error 2023-07-19 17:47:12 +03:00
Bananymous 7d00c2670f Kernel: Support execute disable bit 
We will now map executable memory explicitly as executable.
 2023-07-13 14:28:53 +03:00
Bananymous bca7e9a1e8 Kernel: CPUID can detect wether cpu supports nxe bit 2023-07-13 14:24:58 +03:00
Bananymous 3748f0304f Kernel: Fix multiple bugs with terminal 2023-07-13 13:09:52 +03:00
Bananymous 74c79c7eff Kernel: Rewrite whole device structure 
We now have DevFileSystem which is derived from RamFileSystem. All
devices are RamInodes. We don't have separate DeviceManager anymore.
To iterate over devices, you can loop througn every inode in devfs.
 2023-07-10 23:17:14 +03:00
Bananymous 5a5656b2d3 Kenrel: RamInode now implements truncate() 2023-07-10 16:07:09 +03:00
Bananymous 1a1e584cba Kernel: OpenFileDescriptors can now store more than 8 bits of flags 2023-07-10 16:06:36 +03:00
Bananymous 65fa05f998 Kernel: add O_TRUNC 
this is not supported by anything yet
 2023-07-10 15:48:18 +03:00
Bananymous 1e173c178d Kernel: Ext2 fill now return ENOTSUP on write 
We used to crash the kernel
 2023-07-10 15:34:25 +03:00
Bananymous 4972284dde Kernel: open() and openat() now take mode as parameter 
O_CREAT now tries to create file if O_CREAT is specified
 2023-07-10 15:08:54 +03:00
Bananymous 45789fda08 Kernel: You can now read/write to RamInodes 
RamFS should be stored on physical pages and not in kmalloc, but
that will be implemented later :)
 2023-07-10 14:09:35 +03:00
Bananymous 3b5bc63d1b Kernel: Inode::create_file() now takes uid and gid as parameters 2023-07-10 13:32:10 +03:00
Bananymous f1089e2b8a Kernel: start work on ram file system 2023-07-10 13:26:14 +03:00
Bananymous 363c325c79 Kenrel: Fix inode comparison 
We should not compare rdevs
 2023-07-10 11:48:11 +03:00
Bananymous 583504ebe0 Kernel: Inode rename directory functions 2023-07-10 11:48:11 +03:00
Bananymous b354b77f8b Kernel: Mark Ext2 classes final 2023-07-10 11:48:11 +03:00
Bananymous 19dab08275 Kernel: add more functionality to PCI 2023-07-09 23:04:11 +03:00
Bananymous 78c091f7f8 Kernel: Move open file descriptors to their own class 
This simplifies code a lot :)
 2023-07-07 23:11:37 +03:00
Bananymous a549336530 Kernel/LibC: add basic dup2 2023-07-06 23:17:54 +03:00
Bananymous 4eb95c963d Kernel/LibC: Add basic pipe() syscall and command 
You can now create pipes :)
 2023-07-06 22:16:26 +03:00
Bananymous 3c068aa0ae Kernel/LibC: add clock_gettime() for CLOCK_MONOTONIC 
This gets the number of milliseconds since boot
 2023-07-06 00:38:29 +03:00
Bananymous 86df258365 Kernel: rework the whole PageTable structure 
We now have page table structure for kernel memory which is shared
between all processes.
 2023-07-05 23:41:35 +03:00
Bananymous 0d620f3e0f Kernel: Rewrite and optimize DiskCache 
DiskCache now consists of PageCaches which are caches of contiguous
sectors. This allows the disk cache to be ordered and faster traversal.

We seem to have a problem somewhere during reading. The stack gets
corrupted.
 2023-06-19 10:31:47 +03:00
Bananymous 5e123031aa Kernel: kmalloc has now somewhat dynamic storage 
Allocations bigger than PAGE_SIZE and those not forced to be identity
mapped are now done on a GeneralAllocator. This allows us to use kmalloc
for big allocations; bigger than the fixed 1 MiB storage.

This is still a hack and the whole kmalloc will have to be rewritten at
some point, but for now this does the job :D
 2023-06-18 23:27:00 +03:00
Bananymous 388f530edd Kernel: Add GeneralAllocator::paddr_of 
Yoy can now query physical address of a virtual address for general
allocator allocation
 2023-06-18 23:25:51 +03:00
Bananymous 714305ef56 Kernel: General allocator takes first valid vaddr as parameter 2023-06-17 22:23:34 +03:00
Bananymous 32e1473c94 Kernel: Make disk IO blocking thread safe 
This was causing a lot of deadlocks on vms without kvm accel
 2023-06-12 18:57:47 +03:00
Bananymous bf617036c7 Kernel: Rework syscall calling 
I removed the intermediate function when calling syscalls. Now syscall
handler calls the current process automatically. Only exception is
sys_fork, since it needs a assembly trampoline for the new thread.
 2023-06-12 14:16:48 +03:00
Bananymous ce55422a24 Kernel: Remove Shell from kernel 
This is now obsolete since we have a userspace Shell.
 2023-06-12 02:04:52 +03:00
Bananymous 0f63cfa43f Kernel/LibC: add SYS_{SET,GET}_PWD and chdir, getpwd 2023-06-12 02:02:52 +03:00
Bananymous b254ade69b Kernel: Add SYS_GET_{,E}{UID,GID} 2023-06-11 22:37:00 +03:00
Bananymous ef4ebaa969 Kernel: Add syscalls for set{,e,re}{uid,gid} 2023-06-11 22:37:00 +03:00
Bananymous c62e820bcf Kernel: Add basic Credentials for the system 
Now filesystem access/open, etc confirm that you have access for rwxs
 2023-06-11 20:06:06 +03:00
Bananymous 5aed186827 Kernel: Add SYS_OPENAT 2023-06-11 03:29:22 +03:00
Bananymous e209ca7c82 Kernel: Rewrite directory listing so it can be integrated to libc 2023-06-11 00:17:18 +03:00
Bananymous db49cbd6e2 Kernel: We now store the processes exit code 2023-06-10 17:31:56 +03:00
Bananymous 27cef23823 Kernel: Scheduler now has reschedule() 
This can be called from anywhere and just causes the scheduler to
schedule the next thread. This is more efficient and verbose version
of Scheduler::set_current_thread_sleeping(0), since we don't have
to wake other threads or do other verifications.
 2023-06-09 00:47:17 +03:00
Bananymous b7fc2dc3d0 Kenrel: Rename Scheduler::reschedule -> Scheduler::timer_reschedule 2023-06-09 00:41:43 +03:00
Bananymous 8af390e0f6 Kernel: Big commit. Rewrite ELF loading code 
We now load ELF files to VirtualRanges instead of using kmalloc.
We have only a fixed 1 MiB kmalloc for big allocations and this
allows loading files even when they don't fit in there.

This caused me to rewrite the whole ELF loading process since the
loaded ELF is not in memory mapped by every process.

Virtual ranges allow you to zero out the memory and to copy into
them from arbitary byte buffers.
 2023-06-09 00:37:43 +03:00
Bananymous 96d6453ea8 Kernel: PageTableScope locks the PageTable before disabling interrupts 
This allows replacing some PageTableScopes with PageTable::lock()
 2023-06-09 00:34:41 +03:00
Bananymous 86f58f60cb LibC: implement setenv, unsetenv, putenv 2023-06-05 22:51:02 +03:00
Bananymous 064ce568c2 Kernel: add basic support for environment variables 
exec functions will search files from PATH
 2023-06-05 22:51:02 +03:00
Bananymous 0b1b4d8f7e Kernel: exec now has better posix errors 2023-06-05 21:12:08 +03:00
Bananymous b0e9ab0519 Kernel/LibC: pass environ pointer to process 2023-06-05 21:12:08 +03:00
Bananymous 5425394880 Kernel: TTY now supports CSI s and u 
These are commonly supported values to save and load cursor
position
 2023-06-05 18:19:13 +03:00
Bananymous 9d64dbd5c2 Kernel/LibC: add SYS_STAT and stat(), lstat() 2023-06-05 14:37:14 +03:00
Bananymous b68d5a5833 Kernel: Add SYS_WAIT 
This syscall waits for a given pid.
 2023-06-04 18:00:52 +03:00
Bananymous 924fc2118c Kernel: Allocators are now stored in UniqPtr 
This allows proper memory management, we had some memory leak
 2023-06-04 01:25:57 +03:00
Bananymous 51f4c0c750 Kernel: make load_elf() its own function 2023-06-04 01:24:11 +03:00
Bananymous 37b93da650 Kernel: PhysicalRange maps its nodes to kernel vaddr space 
This keeps the lower half of address space cleaner
 2023-06-04 01:20:47 +03:00
Bananymous 8352392b38 Kernel: You can specify first vaddr for getting free pages 2023-06-04 01:15:48 +03:00
Bananymous dc1aff58ed Kernel: PAGE_FLAG_MASK is now only 0xF 
We don't care currenly about anything but the last few bits
 2023-06-03 20:08:13 +03:00
Bananymous 9f75d9cfe5 Kernel: PageTable now has debug_dump 
This dumps all the mapped pages and their flags
 2023-06-03 20:08:13 +03:00
Bananymous a4cb5d8360 Kernel: Inode/Device detection is done with overridden bool functions 2023-06-03 13:28:15 +03:00
Bananymous 59b807189f Kernel: add basic disk cache 
ATADevices now add disk cache to themselves
 2023-06-03 02:23:14 +03:00
Bananymous fb1c7015b1 Kernel: Shell 'memory' now prints heap memory usage 2023-06-03 02:22:18 +03:00
Bananymous 4d4d0e26a9 Kernel: Symlinks are now working 
We still have to implement loop or depth detection
 2023-06-02 11:43:46 +03:00
Bananymous 232fdcb82c Kernel: add basic support for symlinks 2023-06-01 00:24:45 +03:00
Bananymous 4da1d6fd27 Kernel: Implement Process::exec() 2023-05-31 20:56:29 +03:00
Bananymous 909e847369 Kernel: Move userspace entry functions to Process instead of Thread 2023-05-31 19:31:10 +03:00
Bananymous ed0dcacab3 Kernel: Move V2P and P2V to Memory/Types.h 2023-05-30 23:57:03 +03:00
Bananymous 57f7da6ce1 Kernel: Booting with higher half kernel gets to Heap initialization 2023-05-30 22:21:12 +03:00
Bananymous e640344d7a Kernel: Rename MMU to PageTable 
This is more descriptive name for what it actually represents
 2023-05-29 21:06:09 +03:00
Bananymous 7151bb86a8 Kernel/LibC: opening standard files is done in libc 2023-05-29 20:21:19 +03:00
Bananymous dd3f34cb2c Kernel: Make RecursiveSpinLock thread safe 
also SpinLock is now implemented with gcc builtins
 2023-05-29 19:38:09 +03:00
Bananymous 282bf24f65 Kernel: fork() now copies allocations through FixedWidthAllocator 2023-05-28 21:34:35 +03:00
Bananymous f964f6be8d Kernel: Move page macros to Types.h 2023-05-28 21:03:08 +03:00
Bananymous 0202ccec5f Kernel: ISR will now crash userspace process instead of panicing kernel 2023-05-28 20:53:10 +03:00
Bananymous 636c308993 Kernel: fork() now copies allocation done through GeneralAllocator 2023-05-28 20:37:39 +03:00
Bananymous 6fdbe6f9c2 Kernel: Add bareboness fork() function 2023-05-28 18:08:49 +03:00
Bananymous c19f4c019a Kernel: Add invalidate() to MMU 2023-05-28 18:05:49 +03:00
Bananymous 0129619d9a Kernel: Processes and Threads use VirtualRange memory allocations 2023-05-28 17:48:34 +03:00
Bananymous e0479b291d Kernel: Move PhysicalRange to its own file and add VirtualRange 2023-05-28 17:48:34 +03:00
Bananymous b847d7dfd5 Kernel: MMU::get() is now MMU::kernel 
MMU is can now be locked with RecursiveSpinLock.

Scheduler now has get_current_tid() that works before the Scheduler
is initialized. This allows RecursiveSpinLock usage early on.
 2023-05-28 16:18:18 +03:00
Bananymous f79250c4d4 LibC: Rewrite all the headers. 
We now have more or less posix issue 2018 conforming libc headers.

This was a really time consuming and boring operation but it had to
be done.

Now we get to actually start implementing libc :)
 2023-05-26 22:31:21 +03:00
Bananymous 9e0abbc2f0 Kernel: Add bareboness possibility to set termios 2023-05-26 22:31:21 +03:00
Bananymous 4a4a3bf184 Kernel/LibC: move file offset back to kernel 
This makes keeping track of offsets easier and more proper
 2023-05-26 22:31:21 +03:00
Bananymous f33e78882e Kernel: Add argc and argv to process entry 2023-05-16 00:27:49 +03:00
Bananymous 0ff067bdb7 Kernel: Add MMUScope 
This disables interrupts and loads specified mmu for the
scope it lives in
 2023-05-16 00:26:39 +03:00
Bananymous 31ac3260ed Kernel: MMU keeps track of the current 2023-05-16 00:26:39 +03:00
Bananymous 53f4b5a9da LibC: add function declarations to sys/stat.h 2023-05-11 15:11:33 +03:00
Bananymous 1cf7ef3de6 Kernel: Remove offset from OpenFileDescriptor 
This is now handled on the libc side. There might be reasons to
have it in kernel side, but for simplicity's sake I'm moving it
to libc for now :)
 2023-05-09 20:31:22 +03:00
Bananymous 812e61ca70 Kernel: Add barebones GeneralAllocator for >4096B 2023-05-08 22:10:49 +03:00
Bananymous 2d0a5a9e15 Kernel: FixedWidthAllocator operates on MMU 
Instead of Process* we use MMU& in FixedWidthAllocator since it is
everything it actually needs :)
 2023-05-08 00:06:56 +03:00
Bananymous f32d594879 Kernel: We add FixedWidthAllocators on demand 
On SYS_ALLOC we will add a new FixedWidthAllocator if the old ones
are already full or we don't have one with proper size. This allows
arbitary number of allocations as long as you have enough memory
available :)

Next I will be writing a general allocator for allocations larger
than 4096 bytes which should make SYS_ALLOC syscall complete :)
 2023-05-07 23:57:01 +03:00
Bananymous 2fe9af7165 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 ff5bcd4416 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 b65cd1d09b Kernel: Invalid physical addresses from heap are specified now by 0 2023-05-06 17:34:22 +03:00
Bananymous 06bc807e34 Kernel: MMU can now provide info about virtual address space 2023-05-06 17:34:22 +03:00
Bananymous 0cb53efa01 Kernel: 64 bit MMU now properly identity maps kernel 2023-05-05 14:19:28 +03:00
Bananymous f139fc2229 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 58ce907327 Kernel: Usespace threads now have an interrupt stack 2023-04-25 14:49:18 +03:00
Bananymous 6ecc8cac0e Kernel: TSS stack can be set after initialization 2023-04-25 14:48:12 +03:00
Bananymous bd95f17426 Kernel: Stack pointer out of bounds now panics with a message 2023-04-25 13:40:55 +03:00
Bananymous b15deb420f LibC: Write mostly functioning stdio 2023-04-23 14:32:37 +03:00
Bananymous 8a5608df91 Kernel: d{print,warn,error}ln(...) now has a spinlock 2023-04-22 17:58:51 +03:00
Bananymous 3f1c0ec91b Kernel: Process now frees up its pages on destruction 2023-04-22 16:54:46 +03:00
Bananymous 1406a75a92 Kernel: Cleanup process creation for userspace 2023-04-22 16:51:50 +03:00
Bananymous ec8b9640e2 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 be14a6c239 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 3aa0eeb4a3 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 b3eeb6412f Kernel: Add some bareboness functionality to map virtual addresses 2023-04-19 23:51:36 +03:00
Bananymous d38470c8e2 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 4475e3e184 Kernel: ATAController will fail to initialize in native mode 2023-04-19 17:29:36 +03:00
Bananymous cf0320e47d Kernel: PCI devices now report their prog_if 2023-04-19 16:43:05 +03:00
Bananymous 59a682c720 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 7bd4593748 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 5494e2c125 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 aba82564f5 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 93abee9c7c 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 2614437ba0 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 1aac3a0425 Kernel: Heap implementation can now give free pages from all of RAM 2023-04-18 10:18:15 +03:00
Bananymous a180e72b6f Kernel: Start working on heap 2023-04-18 10:18:15 +03:00
Bananymous 9c0f3dd996 Kernel: Move kmalloc and MMU to Memory directory 2023-04-18 10:18:15 +03:00
Bananymous 8637959289 Kernel: We can create basic userspace processes 
These are still allocated on the kernel memory
 2023-04-12 17:52:36 +03:00
Bananymous 6be53668b9 Kernel: Scheduler can now terminate processes threads 2023-04-12 17:49:04 +03:00
Bananymous 12779cdef8 Kernel: Threads now use only 4 KiB stack :) 2023-04-12 00:22:08 +03:00
Bananymous 809eb2fe3e Kernel: Mark Scheduler::start() as noreturn as appropriate 2023-04-11 23:33:20 +03:00
Bananymous 8d6db168d6 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 2fabe1949c 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 e704968f96 Kernel: Threads can now be terminated mid execution 2023-04-10 21:07:25 +03:00
Bananymous abbbf7ec15 Kernel: Add tty to process and make termios modifiable 2023-04-05 02:53:28 +03:00