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
b254ade69b
Kernel: Add SYS_GET_{,E}{UID,GID}
2023-06-11 22:37:00 +03:00
ef4ebaa969
Kernel: Add syscalls for set{,e,re}{uid,gid}
2023-06-11 22:37:00 +03:00
51eb44bf40
Kernel/Userspace: Add basic init process
...
This process parses /etc/passwd and promps login screen.
When an username is entered, it will launch that users shell
2023-06-11 22:37:00 +03:00
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
46c34db6cb
Kernel: GeneralAllocator and FixedWidth allocator invalidate TLB caches
...
We were getting random exceptions when reallocating same addressess and
this fixes that problem :)
2023-06-11 15:57:48 +03:00
8be28012ee
LibC: Reorder some syscalls
2023-06-11 03:29:22 +03:00
5aed186827
Kernel: Add SYS_OPENAT
2023-06-11 03:29:22 +03:00
91f812e17f
Kernel: Exceptions will now enable interrupts before calling exit()
...
this allows scheduler verification on reschedule() not panic
2023-06-11 03:29:22 +03:00
52c4eebd77
Kernel: Implement SYS_FSTAT
2023-06-11 03:29:22 +03:00
825ec221b7
Kernel: we don't panic anymore on unrecognized syscall
2023-06-11 00:18:48 +03:00
e31080bce3
Kernel: allow open() call with O_SEARCH
2023-06-11 00:18:34 +03:00
7a5d5cabad
Kernel: Add syscall for reading directory entries
2023-06-11 00:18:08 +03:00
e209ca7c82
Kernel: Rewrite directory listing so it can be integrated to libc
2023-06-11 00:17:18 +03:00
db49cbd6e2
Kernel: We now store the processes exit code
2023-06-10 17:31:56 +03:00
97c7fc42d1
Kernel: SpinLocks now reschedule if they cannot aquire the lock
...
This allows us to not actually spin doing nothing while waiting for
another (not executing) to release the lock. This api won't probably
work when we get to SMP
2023-06-09 00:53:32 +03:00
7da0627f8e
Kernel: Process::exit() now uses the new Scheduler::reschedule()
...
We use this new function while waiting for all blocking threads to
resume execution
2023-06-09 00:49:19 +03:00
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
b7fc2dc3d0
Kenrel: Rename Scheduler::reschedule -> Scheduler::timer_reschedule
2023-06-09 00:41:43 +03:00
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
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
2b9900e56e
Kernel: get_free_contiguous_pages works with non-page aligned addresses
...
also fix bug in ordering
2023-06-06 02:03:23 +03:00
86f58f60cb
LibC: implement setenv, unsetenv, putenv
2023-06-05 22:51:02 +03:00
064ce568c2
Kernel: add basic support for environment variables
...
exec functions will search files from PATH
2023-06-05 22:51:02 +03:00
0b1b4d8f7e
Kernel: exec now has better posix errors
2023-06-05 21:12:08 +03:00
b0e9ab0519
Kernel/LibC: pass environ pointer to process
2023-06-05 21:12:08 +03:00
668517a723
Kernel: TTY now actually flushes on ^D
2023-06-05 20:21:46 +03:00
649f08ec78
Kernel: verify that loaded elfs are executable
2023-06-05 19:29:32 +03:00
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
9d64dbd5c2
Kernel/LibC: add SYS_STAT and stat(), lstat()
2023-06-05 14:37:14 +03:00
b68d5a5833
Kernel: Add SYS_WAIT
...
This syscall waits for a given pid.
2023-06-04 18:00:52 +03:00
94d2090777
Kernel: fork() now clones current thread
...
This is how posix specifies thread cloning during fork
2023-06-04 17:40:37 +03:00
e97585daf9
Kernel: Process FixedWidthAllocators come now in 4 sizes
2023-06-04 01:26:43 +03:00
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
51f4c0c750
Kernel: make load_elf() its own function
2023-06-04 01:24:11 +03:00
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
35e739dcdd
Kernel: reorder process exit steps
2023-06-04 01:19:04 +03:00
8352392b38
Kernel: You can specify first vaddr for getting free pages
2023-06-04 01:15:48 +03:00
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
9f75d9cfe5
Kernel: PageTable now has debug_dump
...
This dumps all the mapped pages and their flags
2023-06-03 20:08:13 +03:00
a42af7e973
Kernel: boot.S is back to 2 MiB pages
...
bochs doesn't seem to support 1 GiB pages
2023-06-03 18:53:36 +03:00
a4cb5d8360
Kernel: Inode/Device detection is done with overridden bool functions
2023-06-03 13:28:15 +03:00
da7f09cf82
Kernel: Heap will return 0 if no free page is available
2023-06-03 02:55:31 +03:00
0166af472b
Kernel: DiskCache will try to shrink_to_fit after cache cleanup
2023-06-03 02:55:22 +03:00
884d986bd6
Kernel: DiskCache won't crash when running out of kmalloc memory
2023-06-03 02:36:20 +03:00
59b807189f
Kernel: add basic disk cache
...
ATADevices now add disk cache to themselves
2023-06-03 02:23:14 +03:00
fb1c7015b1
Kernel: Shell 'memory' now prints heap memory usage
2023-06-03 02:22:18 +03:00
9bd4d68f9c
Kernel: Shell ls and stat now properly show symlinks
2023-06-02 18:22:56 +03:00
633cb4f282
Kernel: VFS now has max link depth of 100
2023-06-02 12:50:40 +03:00
4d4d0e26a9
Kernel: Symlinks are now working
...
We still have to implement loop or depth detection
2023-06-02 11:43:46 +03:00
0ffd2a5c1d
Kernel: Shell can now list symlinks
2023-06-01 00:25:53 +03:00
232fdcb82c
Kernel: add basic support for symlinks
2023-06-01 00:24:45 +03:00
0ccc23d544
Kernel: Shell opens standard files
2023-05-31 23:14:15 +03:00
02f0239016
Kernel: Cleanup exec code
2023-05-31 22:36:05 +03:00
ab61b49aca
Kernel: Add SYS_EXEC syscall
2023-05-31 20:57:33 +03:00
4da1d6fd27
Kernel: Implement Process::exec()
2023-05-31 20:56:29 +03:00
909e847369
Kernel: Move userspace entry functions to Process instead of Thread
2023-05-31 19:31:10 +03:00
eafa09fecf
Kernel: boot.S maps GiB as single pdpte
2023-05-31 00:51:15 +03:00
8175348284
Kernel: Fix comment
2023-05-31 00:51:15 +03:00
b2832cb47a
Kernel: PageTable destructor works now
...
we are successfully booting higher half kernel now :)
2023-05-31 00:44:14 +03:00
9f499991c8
Kernel: PageTable::create_userspace() now works
2023-05-31 00:44:14 +03:00
9a416e8ae8
Kernel: kmalloc free error prints the pointer
2023-05-31 00:34:56 +03:00
911922c6a3
Kernel: RSDP location is now done with virtual addresses
2023-05-31 00:34:21 +03:00
1f2fd59ad5
Kernel: Physical range now calculates RAM with physical addresses
2023-05-31 00:33:44 +03:00
708d401d2c
Kernel: Heap gets multiboot pointer with P2V
2023-05-30 23:57:44 +03:00
ed0dcacab3
Kernel: Move V2P and P2V to Memory/Types.h
2023-05-30 23:57:03 +03:00
e86050f343
Kernel: PageTable::map_range_at maps correctly the last page
2023-05-30 23:56:07 +03:00
57f7da6ce1
Kernel: Booting with higher half kernel gets to Heap initialization
2023-05-30 22:21:12 +03:00
93e6455171
Kernel: start work on higher half kernel
2023-05-30 08:00:17 +03:00
265fe9c62e
Kernel: We now identity map full GiB in boot.S
...
The paging structure is pre-built so no unnecessary calculations are done
2023-05-30 00:08:52 +03:00
3b9d60d7cb
Kernel: Remove unused includes of CriticalScope
2023-05-29 21:15:55 +03:00
278b873e89
Kernel: Remove unnecessary usages of PageTableScope
...
This should be used as few times as possible since it calls 'cli'
2023-05-29 21:11:29 +03:00
e640344d7a
Kernel: Rename MMU to PageTable
...
This is more descriptive name for what it actually represents
2023-05-29 21:06:09 +03:00
7151bb86a8
Kernel/LibC: opening standard files is done in libc
2023-05-29 20:21:19 +03:00
3d95cf02f3
Kernel: We can't lock the MMU lock in load()
...
It needs to be callable always by scheduler
2023-05-29 19:39:35 +03:00
dd3f34cb2c
Kernel: Make RecursiveSpinLock thread safe
...
also SpinLock is now implemented with gcc builtins
2023-05-29 19:38:09 +03:00
0c316ebfb2
Kernel: Add SYS_SLEEP
2023-05-28 22:34:48 +03:00
282bf24f65
Kernel: fork() now copies allocations through FixedWidthAllocator
2023-05-28 21:34:35 +03:00
f964f6be8d
Kernel: Move page macros to Types.h
2023-05-28 21:03:08 +03:00
0202ccec5f
Kernel: ISR will now crash userspace process instead of panicing kernel
2023-05-28 20:53:10 +03:00
636c308993
Kernel: fork() now copies allocation done through GeneralAllocator
2023-05-28 20:37:39 +03:00
6fdbe6f9c2
Kernel: Add bareboness fork() function
2023-05-28 18:08:49 +03:00
c19f4c019a
Kernel: Add invalidate() to MMU
2023-05-28 18:05:49 +03:00
83eb3dc0cb
Kernel: fix MMU::map_page_at()
...
We used to only reassign if flags changed
2023-05-28 17:57:05 +03:00
0129619d9a
Kernel: Processes and Threads use VirtualRange memory allocations
2023-05-28 17:48:34 +03:00
e0479b291d
Kernel: Move PhysicalRange to its own file and add VirtualRange
2023-05-28 17:48:34 +03:00
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
fed690a7f2
Kernel: Directory listing is working again
2023-05-26 22:31:21 +03:00
54d981120d
Kernel: kmalloc debug_dump is marked [[maybe_unused]]
2023-05-26 22:31:21 +03:00
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
0ab3332ad3
Userspace: Start work on shell
2023-05-26 22:31:21 +03:00
9e0abbc2f0
Kernel: Add bareboness possibility to set termios
2023-05-26 22:31:21 +03:00
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
f33e78882e
Kernel: Add argc and argv to process entry
2023-05-16 00:27:49 +03:00
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
31ac3260ed
Kernel: MMU keeps track of the current
2023-05-16 00:26:39 +03:00
85039020d3
Kernel: argc is passed as zero to userspace
2023-05-11 18:28:32 +03:00
7eb43990ad
BuildSystem: userspace has cmake target
2023-05-11 16:19:53 +03:00
53f4b5a9da
LibC: add function declarations to sys/stat.h
2023-05-11 15:11:33 +03:00
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
812e61ca70
Kernel: Add barebones GeneralAllocator for >4096B
2023-05-08 22:10:49 +03:00
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
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
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
0deda83d05
BuildSystem: linker -O2 doesn't do anything? hopefully
2023-05-06 19:58:08 +03:00
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
b65cd1d09b
Kernel: Invalid physical addresses from heap are specified now by 0
2023-05-06 17:34:22 +03:00
bc35a561d3
Kernel: GDT tss selector is now 16 bit value
2023-05-06 17:34:22 +03:00
06bc807e34
Kernel: MMU can now provide info about virtual address space
2023-05-06 17:34:22 +03:00
6262e41de1
Kernel: ISRs now print pid and tid
2023-05-06 00:10:15 +03:00
0cb53efa01
Kernel: 64 bit MMU now properly identity maps kernel
2023-05-05 14:19:28 +03:00
4e859bedbc
Kernel: TTY input process is now single instance
...
Process sends key events to the active (currently only) tty
2023-04-30 16:11:14 +03:00
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
e48acbb03b
Kernel: Add set_tss_stack() to 32 bit
2023-04-28 14:44:23 +03:00
d1155c968e
Kernel: dprintln file name is now relative
...
This makes file names much shorter
2023-04-28 14:43:19 +03:00
46dcf98fc1
Kernel: Scheduler updates tss stack on thread execution
2023-04-25 14:49:50 +03:00
58ce907327
Kernel: Usespace threads now have an interrupt stack
2023-04-25 14:49:18 +03:00
6ecc8cac0e
Kernel: TSS stack can be set after initialization
2023-04-25 14:48:12 +03:00
bd95f17426
Kernel: Stack pointer out of bounds now panics with a message
2023-04-25 13:40:55 +03:00
175f07cd2f
Kernel: Fix bug in Process::create_userspace()
...
We used to write more than we needed to. This could lead to unwanted
page faults
2023-04-25 13:21:28 +03:00
77c83e5552
Kernel: Fix possible dead lock in Process::read()
2023-04-23 14:46:18 +03:00
b15deb420f
LibC: Write mostly functioning stdio
2023-04-23 14:32:37 +03:00
b38989d594
Kernel: Add ASSERTion to Process::exit()
...
This is just so I don't forget that exit can currently only
be called on the executing thread itself
2023-04-22 19:05:27 +03:00
79e6de325f
Kernel: Process can now load 32 bit elf files on i386
...
We are page faulting on process exit but I'm investigating
the reason.
2023-04-22 19:03:30 +03:00
4f8f3ddc29
Kernel: Fix 32 bit MMU
2023-04-22 18:22:39 +03:00
82a1a29260
Kernel: More proper paging in Elf loading
2023-04-22 18:17:44 +03:00
8a5608df91
Kernel: d{print,warn,error}ln(...) now has a spinlock
2023-04-22 17:58:51 +03:00
3f1c0ec91b
Kernel: Process now frees up its pages on destruction
2023-04-22 16:54:46 +03:00
1406a75a92
Kernel: Cleanup process creation for userspace
2023-04-22 16:51:50 +03:00
8001493df3
Kernel: Fix some deadlocks in the Process
2023-04-22 16:19:57 +03:00
8c1f5bfe1e
Kernel: Remove obsolete userspace stuff from kernel
2023-04-22 15:38:45 +03:00
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
d9068eebb5
Kernel: kmalloc does not dump stack trace
...
dump_stack_trace() page faults and i dont feel like debugging this
now :)
2023-04-21 13:45:13 +03:00
3ad0d2328d
Kernel: Don't call 'cli' on interrupt
...
This is automatically done because we are using interrupt gates
in the IDT
2023-04-21 11:18:08 +03:00
3f2beb4547
Kernel: Fix syscall return value in 32 bit
2023-04-21 11:08:02 +03:00
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
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
b3eeb6412f
Kernel: Add some bareboness functionality to map virtual addresses
2023-04-19 23:51:36 +03:00
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
a159c980ee
Kernel: kmalloc will always print debug on failed alloc
2023-04-19 18:05:01 +03:00
4475e3e184
Kernel: ATAController will fail to initialize in native mode
2023-04-19 17:29:36 +03:00
cf0320e47d
Kernel: PCI devices now report their prog_if
2023-04-19 16:43:05 +03:00
cd03a95128
Kernel: Shell fix file reading
...
We were reading 8 bytes at a time instead of the 1024 we were
supposed to :DD
2023-04-19 14:09:23 +03:00
51e299c7e3
Kernel: Shell now has exit() command
2023-04-19 12:53:09 +03:00
6f65453fd4
Kernel: Fix Process::exit() and where it is called from
...
cksum doesn't seem to work anymore on big files. I have to look
into this. It locks up after couple of seconds...
2023-04-19 12:52:21 +03:00
d74ce4950c
Kernel: We now launch Shell again on boot
...
Adding this just before push :D
2023-04-19 00:41:24 +03:00
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
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
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
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
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