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331 Commits

Author SHA1 Message Date
Bananymous acf125c853 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 3c6be319b1 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 104894c0c7 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 2f52001c6d 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 9f75b04714 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 f6ee4b3496 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 1ef0534b69 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 b9dd1895bb Kernel: add Thread::queue_signal() 2023-07-24 22:26:10 +03:00
Bananymous be47743dfa Kernel: Scheduler can now block threads based on tid 2023-07-24 22:24:21 +03:00
Bananymous 57798e5d76 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 cd64c1cfec Kernel: add is_tty() to inode 2023-07-24 22:19:59 +03:00
Bananymous f76d921e25 Kernel: you can now ask process if it is userspace process 2023-07-23 18:54:10 +03:00
Bananymous a2bf474013 Kernel: OpenFileDesctiptor can now return inode of fd 2023-07-23 18:52:33 +03:00
Bananymous 9729e5a05b Kernel: Change signal kernel API 
return rsp and rip are now stored per thread
 2023-07-23 18:33:10 +03:00
Bananymous 2dce0a0415 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 c12f4fb40f Kernel: Make signals more POSIX 2023-07-21 20:01:12 +03:00
Bananymous 10169d773d Kernel/LibC: Add SYS_KILL/kill() 2023-07-21 19:27:38 +03:00
Bananymous b78596dcf4 Kernel: Scheduler now sends queued signals 2023-07-21 19:27:10 +03:00
Bananymous 40f7c6b8fa Kernel: Make signals thread specific 2023-07-21 19:00:59 +03:00
Bananymous 8063700d7b Kernel: add default signal actions 2023-07-21 18:02:35 +03:00
Bananymous c2cf98e32f 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 5babd7b4f2 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 4e35b8b49d Kernel: Syscalls now get the interrupt stack 2023-07-21 11:04:16 +03:00
Bananymous b02c486ad0 Kernel: add NullDevice to /dev/null 2023-07-20 00:06:22 +03:00
Bananymous 08cd285ca6 Kernel: move Device.h to its own directory 2023-07-19 23:55:38 +03:00
Bananymous fd9210ba9e Kernel: FixedWidthAllocator creation can now fail 2023-07-19 18:07:24 +03:00
Bananymous 5d2bfc858e Kernel: SYS_FORK can now fail instead of panicing on error 2023-07-19 17:47:12 +03:00
Bananymous 9ea2c1d932 Kernel: Support execute disable bit 
We will now map executable memory explicitly as executable.
 2023-07-13 14:28:53 +03:00
Bananymous 297e65f19a Kernel: CPUID can detect wether cpu supports nxe bit 2023-07-13 14:24:58 +03:00
Bananymous 65559a3e44 Kernel: Fix multiple bugs with terminal 2023-07-13 13:09:52 +03:00
Bananymous 9bcfb34524 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 ee4ef6638c Kenrel: RamInode now implements truncate() 2023-07-10 16:07:09 +03:00
Bananymous 0910958c04 Kernel: OpenFileDescriptors can now store more than 8 bits of flags 2023-07-10 16:06:36 +03:00
Bananymous d6408bcf17 Kernel: add O_TRUNC 
this is not supported by anything yet
 2023-07-10 15:48:18 +03:00
Bananymous 89d4fa4d9b Kernel: Ext2 fill now return ENOTSUP on write 
We used to crash the kernel
 2023-07-10 15:34:25 +03:00
Bananymous f7c4bc908e 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 a0ecbed726 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 74fc0aa308 Kernel: Inode::create_file() now takes uid and gid as parameters 2023-07-10 13:32:10 +03:00
Bananymous d5f0448e48 Kernel: start work on ram file system 2023-07-10 13:26:14 +03:00
Bananymous d713f252aa Kenrel: Fix inode comparison 
We should not compare rdevs
 2023-07-10 11:48:11 +03:00
Bananymous 5ec2d85081 Kernel: Inode rename directory functions 2023-07-10 11:48:11 +03:00
Bananymous 0d132ee518 Kernel: Mark Ext2 classes final 2023-07-10 11:48:11 +03:00
Bananymous 80c8d52dc5 Kernel: add more functionality to PCI 2023-07-09 23:04:11 +03:00
Bananymous a2f5ad7bed Kernel: Move open file descriptors to their own class 
This simplifies code a lot :)
 2023-07-07 23:11:37 +03:00
Bananymous 07fec6e211 Kernel/LibC: add basic dup2 2023-07-06 23:17:54 +03:00
Bananymous 4cd72992c8 Kernel/LibC: Add basic pipe() syscall and command 
You can now create pipes :)
 2023-07-06 22:16:26 +03:00
Bananymous 1fb305fa45 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 4086d7c3be 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 7d254c26bc 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 9a7b2587af 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