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705 Commits

Author SHA1 Message Date
Bananymous 5d67559e33 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 e631eb7a7a Kernel: Fix possible out-of-bounds disk access in ext2 2023-09-08 02:42:53 +03:00
Bananymous 7c11ea3694 Kernel: Cleanup TTY::read() 2023-09-07 15:27:21 +03:00
Bananymous c1fd341698 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 0deab1be51 Kernel: Remove bitmap debug printing from ext2 inode allocation 2023-09-06 01:25:09 +03:00
Bananymous 5a623adaa6 Kernel: Correct inode links count 2023-09-05 14:46:56 +03:00
Bananymous ddd36af0f1 Kernel: Add /dev/tty symlink that targets the current tty 2023-09-05 01:07:52 +03:00
Bananymous 35fd30ee29 Kernel: Implement basic RamSymlinkInode 2023-09-05 01:07:52 +03:00
Bananymous 4a0652684c Kernel: You can now read serial output from the /dev/ttyS* 2023-09-05 01:07:52 +03:00
Bananymous 33c81f00b7 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 55714b90cd 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 9b47603a1d Kernel: Make serial devices to their own class 2023-09-04 14:57:05 +03:00
Bananymous 42b85dc33b Kernel: Add ANSI support for hiding/showing cursor to TTY 2023-09-04 14:30:09 +03:00
Bananymous 044378cfa3 Kernel: Add basic nanosleep, only millisecond percision 2023-09-04 12:59:50 +03:00
Bananymous f1d4d5f995 Kernel: Add basic support for O_NONBLOCK (only for tty) 2023-09-04 12:57:52 +03:00
Bananymous 19d0fb6fcd Kernel: add basic fcntl() with couple of commands and no validation 2023-09-04 12:57:09 +03:00
Bananymous 7933265095 Kernel: Split ext2 implementation to multiple files 2023-09-01 15:10:23 +03:00
Bananymous d810644018 Kernel: Start work on writable ext2 filesystem 2023-08-31 23:40:31 +03:00
Bananymous a7bfc1c2ec Kernel: Add missing ififo() to Inode::Mode 2023-08-31 21:38:31 +03:00
Bananymous 65501837b7 Kernel: Stack trace dumping validates pointers before using them 2023-08-31 21:36:23 +03:00
Bananymous cbd2519b9a Kernel: better handle kernel errors 2023-08-29 00:13:21 +03:00
Bananymous e8a73f9696 BuildSystem: use -a with rsync 
This allows cmake to not rebuild whole project every time
 2023-08-28 11:38:17 +03:00
Bananymous b05cf9ef09 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 ef1077fd7b Kernel: kill() with negative pid actually matches pgid 2023-08-22 14:54:15 +03:00
Bananymous f1ba5c7e0f Kernel: Process keeps track if forked process has called exec*() 2023-08-22 14:53:46 +03:00
Bananymous 97ea4986af Kernel/LibC: implement proper getpgid and setpgid 2023-08-22 14:53:12 +03:00
Bananymous 25c021c15b Kernel: Add function to enumerate processes in session 2023-08-22 14:52:28 +03:00
Bananymous 42b90ae76c Kernel/LibC: Add {get,set}pgrp() 2023-08-22 11:36:33 +03:00
Bananymous ccc61cb10c Kernel: Barebones implementation sessions and process groups 2023-08-22 11:35:40 +03:00
Bananymous 8e4216215e Kernel/LibC: add dup() syscall and function 2023-08-17 12:03:29 +03:00
Bananymous 8c282a5d83 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 8f3348cf2b Kernel: open() now validates file access mode 2023-08-11 11:53:38 +03:00
Bananymous 38c0bc7bae Kernel: Remove unused syscall 2023-08-11 11:43:48 +03:00
Bananymous a7f37236bf Kernel: Zero initialize threads sse_storage 2023-08-11 00:26:43 +03:00
Bananymous 51532336b0 Kernel: Move structures in boot.S to .data section 2023-08-11 00:26:12 +03:00
Bananymous 03d4b47f63 Kernel: HPET is now used in legacy mode when PIC is forced 2023-08-10 22:01:30 +03:00
Bananymous 8b57edde6b 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 778778fede Kernel: HPET doesn't use the legacy mapping anymore 2023-08-10 21:08:32 +03:00
Bananymous f7449c4ab9 Kernel: APIC now uses MMIO namespace functions for mmio 2023-08-10 21:07:23 +03:00
Bananymous fd2bcc9156 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 a5b1555725 Kernel: Validate HPET tick period 2023-08-09 09:50:38 +03:00
Bananymous e74fdbc55b 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 008c777a9f 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 d8a9d4a24e Kerne: SystemTimer can now output the current real time 2023-08-04 16:06:47 +03:00
Bananymous bc0e1fa898 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 17f1737c9a Kernel: Add function to retrieve boot time as timespec 2023-08-04 16:06:47 +03:00
Bananymous 868444f043 Kernel: F11 now prints current time to debug output 
This allows better timer percision and system freeze checks
 2023-08-04 15:22:51 +03:00
Bananymous fdae253695 Kernel: Add basic HPET support to replace PIT if exists 
This works same way as the PIT implementation; calls Scheduler every
milli second.
 2023-08-04 15:22:51 +03:00
Bananymous d4adcff958 Kernel: Move sleep() implementation to TimerHandler 2023-08-04 15:15:00 +03:00
Bananymous 2c59c9a3cc Kernel: Add more structures to ACPI 2023-08-04 15:13:47 +03:00
Bananymous 3a59a64355 Kernel: Implement basic MMIO functions 
This is equivalent to IO.h except for memory mapped io instead of
IO ports
 2023-08-04 15:12:29 +03:00
Bananymous 9363c1cdaf Kernel: Move RTC to Timer directory 
PIT ms counter seems to be off by multiple seconds/minute. I will
be probably changing to HPET for system time
 2023-08-04 11:12:16 +03:00
Bananymous 198e6d7cf6 Kernel: Start work on abstracting Timers 2023-08-04 10:29:42 +03:00
Bananymous 07ee898f4f Kernel: Remove unnecessary timer check from Scheduler 2023-08-04 10:29:42 +03:00
Bananymous e57c1fc9fc Kernel: Threads are deleted sooner and cleaner 
We now delete threads when
    1. it is marked as Terminated and is the current thread
    2. it tries to start execution in Terminated state

This allows us to never have thread executing in Terminated state
 2023-08-04 10:29:42 +03:00
Bananymous a11b5ae41f Kernel: align userspace stacks 
I was getting #GP on sse instructions
 2023-08-03 18:09:48 +03:00
Bananymous 91f04ce250 Kernel: Change PageTable API 
Getting free pages not reserves them, so you don't have to hold
the page table lock :)
 2023-08-02 22:09:14 +03:00
Bananymous 926df2b276 Kernel: PageTable now supports reserved pages 
You can now map pages as reserved, so that they will not be given
from get_free_page() or get_free_contiguous_pages().
 2023-08-01 16:35:54 +03:00
Bananymous 217dbca7b7 Kernel: Cleanup returns from any kind on interrupts 2023-08-01 14:23:50 +03:00
Bananymous 679d47131d BuildSystem: Edit build flags regarding sse and warnings 2023-07-31 22:31:17 +03:00
Bananymous 8b1bccb79b Kernel: store/load sse/mmx/fpu state on isr/irq/syscall 
I haven't tested this yet but should be fine. This will be optimized
to only save state from threads that are using it
 2023-07-31 22:28:57 +03:00
Bananymous e86e755c51 Kernel: Generally improve signals 2023-07-31 22:28:18 +03:00
Bananymous 08cdf88586 Kernel: Cleanup signal trampoline 2023-07-30 15:58:35 +03:00
Bananymous 6f7d97cf94 Kernel: Remove is_in_syscall from Thread 2023-07-30 14:49:51 +03:00
Bananymous 5e434f5131 Kernel: Hardware exceptions now sends signals to userspace 2023-07-30 14:34:15 +03:00
Bananymous a152d0aac5 Kernel: raise() now force sends signal 2023-07-30 14:17:07 +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 a5813f9ba5 Kernel: TTY now sends SIGINT on ^C to foreground process 2023-07-28 18:10:09 +03:00
Bananymous 5652af3384 Kernel: Mark reading section from StorageDevice as terminate critical 2023-07-28 18:09:35 +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 e4509d9482 Kernel: DiskCache uses are now done without interrupts 
This allows disk cache to not be invalid state after partial read/write
 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 642a6aa4ad Kernel: Process::exit() unblocks the whole lock before blocking 2023-07-24 22:29:59 +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 7391d91317 Kernel/LibC: add SYS_SIGNAL/signal() 2023-07-21 20:08:13 +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 5f2549b198 BuildSystem: Strip kernel. We will add the map once we use it 2023-07-21 15:47:31 +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 faf4220b38 Kernel: kernel memory takes now full pml4e 
This allows flags to work properly
 2023-07-21 13:47:05 +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 46eb27883a Kernel: Don't map kernel executable memory as writable 2023-07-21 11:17:39 +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 4d5b14753d Kernel: cleanup sys_exec() 
We now scope everyting so desctructors get called
 2023-07-19 23:20:39 +03:00