7e08f0fb66
Kernel: Start work on making inodes more thread safe
...
All inode operations are now locked and thread blocked
2023-09-10 00:31:42 +03:00
9e4a87021c
Kernel: Fix directory permissions
...
We did not care about X bit in directories and instead used only the
R bit for search/read.
2023-09-08 11:46:53 +03:00
5887f6bcaa
Kernel: Ext2 directories can allocate new blocks if needed
2023-09-08 10:29:26 +03:00
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
e631eb7a7a
Kernel: Fix possible out-of-bounds disk access in ext2
2023-09-08 02:42:53 +03:00
7c11ea3694
Kernel: Cleanup TTY::read()
2023-09-07 15:27:21 +03:00
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
0deab1be51
Kernel: Remove bitmap debug printing from ext2 inode allocation
2023-09-06 01:25:09 +03:00
5a623adaa6
Kernel: Correct inode links count
2023-09-05 14:46:56 +03:00
ddd36af0f1
Kernel: Add /dev/tty symlink that targets the current tty
2023-09-05 01:07:52 +03:00
35fd30ee29
Kernel: Implement basic RamSymlinkInode
2023-09-05 01:07:52 +03:00
4a0652684c
Kernel: You can now read serial output from the /dev/ttyS*
2023-09-05 01:07:52 +03:00
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
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
9b47603a1d
Kernel: Make serial devices to their own class
2023-09-04 14:57:05 +03:00
42b85dc33b
Kernel: Add ANSI support for hiding/showing cursor to TTY
2023-09-04 14:30:09 +03:00
044378cfa3
Kernel: Add basic nanosleep, only millisecond percision
2023-09-04 12:59:50 +03:00
f1d4d5f995
Kernel: Add basic support for O_NONBLOCK (only for tty)
2023-09-04 12:57:52 +03:00
19d0fb6fcd
Kernel: add basic fcntl() with couple of commands and no validation
2023-09-04 12:57:09 +03:00
7933265095
Kernel: Split ext2 implementation to multiple files
2023-09-01 15:10:23 +03:00
d810644018
Kernel: Start work on writable ext2 filesystem
2023-08-31 23:40:31 +03:00
a7bfc1c2ec
Kernel: Add missing ififo() to Inode::Mode
2023-08-31 21:38:31 +03:00
65501837b7
Kernel: Stack trace dumping validates pointers before using them
2023-08-31 21:36:23 +03:00
cbd2519b9a
Kernel: better handle kernel errors
2023-08-29 00:13:21 +03:00
e8a73f9696
BuildSystem: use -a with rsync
...
This allows cmake to not rebuild whole project every time
2023-08-28 11:38:17 +03:00
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
ef1077fd7b
Kernel: kill() with negative pid actually matches pgid
2023-08-22 14:54:15 +03:00
f1ba5c7e0f
Kernel: Process keeps track if forked process has called exec*()
2023-08-22 14:53:46 +03:00
97ea4986af
Kernel/LibC: implement proper getpgid and setpgid
2023-08-22 14:53:12 +03:00
25c021c15b
Kernel: Add function to enumerate processes in session
2023-08-22 14:52:28 +03:00
42b90ae76c
Kernel/LibC: Add {get,set}pgrp()
2023-08-22 11:36:33 +03:00
ccc61cb10c
Kernel: Barebones implementation sessions and process groups
2023-08-22 11:35:40 +03:00
8e4216215e
Kernel/LibC: add dup() syscall and function
2023-08-17 12:03:29 +03:00
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
8f3348cf2b
Kernel: open() now validates file access mode
2023-08-11 11:53:38 +03:00
38c0bc7bae
Kernel: Remove unused syscall
2023-08-11 11:43:48 +03:00
a7f37236bf
Kernel: Zero initialize threads sse_storage
2023-08-11 00:26:43 +03:00
51532336b0
Kernel: Move structures in boot.S to .data section
2023-08-11 00:26:12 +03:00
03d4b47f63
Kernel: HPET is now used in legacy mode when PIC is forced
2023-08-10 22:01:30 +03:00
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
778778fede
Kernel: HPET doesn't use the legacy mapping anymore
2023-08-10 21:08:32 +03:00
f7449c4ab9
Kernel: APIC now uses MMIO namespace functions for mmio
2023-08-10 21:07:23 +03:00
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
a5b1555725
Kernel: Validate HPET tick period
2023-08-09 09:50:38 +03:00
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
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
d8a9d4a24e
Kerne: SystemTimer can now output the current real time
2023-08-04 16:06:47 +03:00
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
17f1737c9a
Kernel: Add function to retrieve boot time as timespec
2023-08-04 16:06:47 +03:00
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
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
d4adcff958
Kernel: Move sleep() implementation to TimerHandler
2023-08-04 15:15:00 +03:00
2c59c9a3cc
Kernel: Add more structures to ACPI
2023-08-04 15:13:47 +03:00
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
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
198e6d7cf6
Kernel: Start work on abstracting Timers
2023-08-04 10:29:42 +03:00
07ee898f4f
Kernel: Remove unnecessary timer check from Scheduler
2023-08-04 10:29:42 +03:00
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
a11b5ae41f
Kernel: align userspace stacks
...
I was getting #GP on sse instructions
2023-08-03 18:09:48 +03:00
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
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
217dbca7b7
Kernel: Cleanup returns from any kind on interrupts
2023-08-01 14:23:50 +03:00
679d47131d
BuildSystem: Edit build flags regarding sse and warnings
2023-07-31 22:31:17 +03:00
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
e86e755c51
Kernel: Generally improve signals
2023-07-31 22:28:18 +03:00
08cdf88586
Kernel: Cleanup signal trampoline
2023-07-30 15:58:35 +03:00
6f7d97cf94
Kernel: Remove is_in_syscall from Thread
2023-07-30 14:49:51 +03:00
5e434f5131
Kernel: Hardware exceptions now sends signals to userspace
2023-07-30 14:34:15 +03:00
a152d0aac5
Kernel: raise() now force sends signal
2023-07-30 14:17:07 +03:00
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
a5813f9ba5
Kernel: TTY now sends SIGINT on ^C to foreground process
2023-07-28 18:10:09 +03:00
5652af3384
Kernel: Mark reading section from StorageDevice as terminate critical
2023-07-28 18:09:35 +03:00
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
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
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
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
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
642a6aa4ad
Kernel: Process::exit() unblocks the whole lock before blocking
2023-07-24 22:29:59 +03:00
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
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
522aa8e762
Kernel: add Thread::queue_signal()
2023-07-24 22:26:10 +03:00
146802fa4c
Kernel: Scheduler can now block threads based on tid
2023-07-24 22:24:21 +03:00
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
f5f4bf58ad
Kernel: add is_tty() to inode
2023-07-24 22:19:59 +03:00
3784da0d18
Kernel: you can now ask process if it is userspace process
2023-07-23 18:54:10 +03:00
9eb72f4392
Kernel: OpenFileDesctiptor can now return inode of fd
2023-07-23 18:52:33 +03:00
f7bf6d5e62
Kernel: Change signal kernel API
...
return rsp and rip are now stored per thread
2023-07-23 18:33:10 +03:00
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
7391d91317
Kernel/LibC: add SYS_SIGNAL/signal()
2023-07-21 20:08:13 +03:00
2149cec29f
Kernel: Make signals more POSIX
2023-07-21 20:01:12 +03:00
ad756c36fc
Kernel/LibC: Add SYS_KILL/kill()
2023-07-21 19:27:38 +03:00
b56316e9da
Kernel: Scheduler now sends queued signals
2023-07-21 19:27:10 +03:00
a989c44211
Kernel: Make signals thread specific
2023-07-21 19:00:59 +03:00
217e5f81cc
Kernel: add default signal actions
2023-07-21 18:02:35 +03:00
5f2549b198
BuildSystem: Strip kernel. We will add the map once we use it
2023-07-21 15:47:31 +03:00
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
faf4220b38
Kernel: kernel memory takes now full pml4e
...
This allows flags to work properly
2023-07-21 13:47:05 +03:00
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
46eb27883a
Kernel: Don't map kernel executable memory as writable
2023-07-21 11:17:39 +03:00
2db7cdb71e
Kernel: Syscalls now get the interrupt stack
2023-07-21 11:04:16 +03:00
f8a1a10897
Kernel: add NullDevice to /dev/null
2023-07-20 00:06:22 +03:00
adbe13938e
Kernel: move Device.h to its own directory
2023-07-19 23:55:38 +03:00
4d5b14753d
Kernel: cleanup sys_exec()
...
We now scope everyting so desctructors get called
2023-07-19 23:20:39 +03:00
ba9fa00947
Kernel: fix memory leak in PageTable
...
PageTable used to leak 2 pages on creation and other two on deletion
2023-07-19 23:17:39 +03:00
98cedf155c
Kernel: FixedWidthAllocator creation can now fail
2023-07-19 18:07:24 +03:00
88e3998664
Kernel: VirtualRange creation can fail
2023-07-19 17:56:26 +03:00
c0c0bbc1bf
Kernel: SYS_FORK can now fail instead of panicing on error
2023-07-19 17:47:12 +03:00
650e1b4fc5
Kernel: Fix bug which made bochs unbootable
...
We could not boot if ATABus did not have valid primary device.
2023-07-13 15:53:09 +03:00
6c1ada8d0a
Kernel: Enable global bit on kernel pages
2023-07-13 15:23:25 +03:00
7d00c2670f
Kernel: Support execute disable bit
...
We will now map executable memory explicitly as executable.
2023-07-13 14:28:53 +03:00
bca7e9a1e8
Kernel: CPUID can detect wether cpu supports nxe bit
2023-07-13 14:24:58 +03:00
3748f0304f
Kernel: Fix multiple bugs with terminal
2023-07-13 13:09:52 +03:00
2576bdbd14
Kernel: Fix ATA disk and partition numbering
2023-07-13 12:12:47 +03:00
72041a52e8
Kernel: Ext2Inode::create_file actually sets the inode data
...
We used to just create inode without touching its memory.
2023-07-13 10:20:56 +03:00
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
5a5656b2d3
Kenrel: RamInode now implements truncate()
2023-07-10 16:07:09 +03:00
1a1e584cba
Kernel: OpenFileDescriptors can now store more than 8 bits of flags
2023-07-10 16:06:36 +03:00
65fa05f998
Kernel: add O_TRUNC
...
this is not supported by anything yet
2023-07-10 15:48:18 +03:00
2276fc95b8
Kernel: creat() mode now has to be access mode
...
We provide the S_IFREG in creat
2023-07-10 15:34:41 +03:00
1e173c178d
Kernel: Ext2 fill now return ENOTSUP on write
...
We used to crash the kernel
2023-07-10 15:34:25 +03:00
773747cf9c
Kernel: O_APPEND is now supported
2023-07-10 15:11:27 +03:00
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
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
3b5bc63d1b
Kernel: Inode::create_file() now takes uid and gid as parameters
2023-07-10 13:32:10 +03:00
f1089e2b8a
Kernel: start work on ram file system
2023-07-10 13:26:14 +03:00
363c325c79
Kenrel: Fix inode comparison
...
We should not compare rdevs
2023-07-10 11:48:11 +03:00
583504ebe0
Kernel: Inode rename directory functions
2023-07-10 11:48:11 +03:00
b354b77f8b
Kernel: Mark Ext2 classes final
2023-07-10 11:48:11 +03:00
19dab08275
Kernel: add more functionality to PCI
2023-07-09 23:04:11 +03:00
3840fbf957
Kernel: Edit lock scopes and make string copy able to fail
2023-07-07 23:12:19 +03:00
78c091f7f8
Kernel: Move open file descriptors to their own class
...
This simplifies code a lot :)
2023-07-07 23:11:37 +03:00
a549336530
Kernel/LibC: add basic dup2
2023-07-06 23:17:54 +03:00
4eb95c963d
Kernel/LibC: Add basic pipe() syscall and command
...
You can now create pipes :)
2023-07-06 22:16:26 +03:00
af30d537da
Kernel: TTY now unblocks semaphore after read
...
This allows concurrent reads not fully reading the buffer not block
indefinately.
2023-07-06 21:32:34 +03:00
f1bd26fb92
Kernel: Add O_CLOEXEC
2023-07-06 20:00:33 +03:00
5c6bbcb62f
Kernel: Remove spammy process/thread exit printing
2023-07-06 10:34:46 +03:00
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
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
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
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
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
d354cccd37
Kernel: Add enum for ISR name to number
2023-06-18 23:24:27 +03:00
714305ef56
Kernel: General allocator takes first valid vaddr as parameter
2023-06-17 22:23:34 +03:00
f83ae1e9c6
Kernel: Move print during boot
2023-06-12 23:45:36 +03:00
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
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
ce55422a24
Kernel: Remove Shell from kernel
...
This is now obsolete since we have a userspace Shell.
2023-06-12 02:04:52 +03:00
0f63cfa43f
Kernel/LibC: add SYS_{SET,GET}_PWD and chdir, getpwd
2023-06-12 02:02:52 +03:00
537780ee1e
Kernel: allocate thread stacks from 0x300000 onwards
...
I had a problem where thread stack was overlapping with elf loading
2023-06-12 01:02:19 +03:00
4ca99fcb4e
Kernel: Fix bug in elf loading
...
We were allocating one extra page
2023-06-12 00:59:19 +03:00
Bananymous