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958 Commits

Author SHA1 Message Date
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 6feb8a99d2 BAN: UniqPtr can now be constructed from other convertible UniqPtr 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 c67a7cec5b LibC: fix typo 2023-08-02 22:10:12 +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 9fe878bbec Shell: Print if the process exited because of a signal 2023-08-01 14:24:36 +03:00
Bananymous 217dbca7b7 Kernel: Cleanup returns from any kind on interrupts 2023-08-01 14:23:50 +03:00
Bananymous 13852e865c LibC: sys/wait.h now has proper exit status macros 
We use the same format as basically every implementation
 2023-08-01 10:32:04 +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 8ec6d4c9fc LibC: we don't parse syscall arguments in unistd 
We just call Kernel::syscall() with 5 arguments from the variadic function.

This was a necessary addition since the syscall() function
used over 2 KiB of stack space.
 2023-07-31 22:24:11 +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 00f1f30a08 Kernel: Userspace sets the foreground process and Shell handles ^C 2023-07-28 18:10:36 +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