de927b6b05
Kernel: Remove is_in_syscall from Thread
2023-07-30 14:49:51 +03:00
1d7795e22c
Kernel: Hardware exceptions now sends signals to userspace
2023-07-30 14:34:15 +03:00
abe8810d47
Kernel: raise() now force sends signal
2023-07-30 14:17:07 +03:00
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
9279bbbd19
Kernel: TTY now sends SIGINT on ^C to foreground process
2023-07-28 18:10:09 +03:00
9fd9a8b5b1
Kernel: Mark reading section from StorageDevice as terminate critical
2023-07-28 18:09:35 +03:00
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
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
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
f609170a6a
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
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
7b4a2fe3d1
Kernel: Process::exit() unblocks the whole lock before blocking
2023-07-24 22:29:59 +03:00
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
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
b9dd1895bb
Kernel: add Thread::queue_signal()
2023-07-24 22:26:10 +03:00
be47743dfa
Kernel: Scheduler can now block threads based on tid
2023-07-24 22:24:21 +03:00
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
cd64c1cfec
Kernel: add is_tty() to inode
2023-07-24 22:19:59 +03:00
f76d921e25
Kernel: you can now ask process if it is userspace process
2023-07-23 18:54:10 +03:00
a2bf474013
Kernel: OpenFileDesctiptor can now return inode of fd
2023-07-23 18:52:33 +03:00
9729e5a05b
Kernel: Change signal kernel API
...
return rsp and rip are now stored per thread
2023-07-23 18:33:10 +03:00
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
d560137ae6
Kernel/LibC: add SYS_SIGNAL/signal()
2023-07-21 20:08:13 +03:00
c12f4fb40f
Kernel: Make signals more POSIX
2023-07-21 20:01:12 +03:00
10169d773d
Kernel/LibC: Add SYS_KILL/kill()
2023-07-21 19:27:38 +03:00
b78596dcf4
Kernel: Scheduler now sends queued signals
2023-07-21 19:27:10 +03:00
40f7c6b8fa
Kernel: Make signals thread specific
2023-07-21 19:00:59 +03:00
8063700d7b
Kernel: add default signal actions
2023-07-21 18:02:35 +03:00
70f89ed1fc
BuildSystem: Strip kernel. We will add the map once we use it
2023-07-21 15:47:31 +03:00
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
a1db032ba9
Kernel: kernel memory takes now full pml4e
...
This allows flags to work properly
2023-07-21 13:47:05 +03:00
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
c0029a2fa2
Kernel: Don't map kernel executable memory as writable
2023-07-21 11:17:39 +03:00
4e35b8b49d
Kernel: Syscalls now get the interrupt stack
2023-07-21 11:04:16 +03:00
b02c486ad0
Kernel: add NullDevice to /dev/null
2023-07-20 00:06:22 +03:00
08cd285ca6
Kernel: move Device.h to its own directory
2023-07-19 23:55:38 +03:00
94af856db0
Kernel: cleanup sys_exec()
...
We now scope everyting so desctructors get called
2023-07-19 23:20:39 +03:00
bf5d74b8bc
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
fd9210ba9e
Kernel: FixedWidthAllocator creation can now fail
2023-07-19 18:07:24 +03:00
66d9260257
Kernel: VirtualRange creation can fail
2023-07-19 17:56:26 +03:00
5d2bfc858e
Kernel: SYS_FORK can now fail instead of panicing on error
2023-07-19 17:47:12 +03:00
8b34880064
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
98c698d9ec
Kernel: Enable global bit on kernel pages
2023-07-13 15:23:25 +03:00
9ea2c1d932
Kernel: Support execute disable bit
...
We will now map executable memory explicitly as executable.
2023-07-13 14:28:53 +03:00
297e65f19a
Kernel: CPUID can detect wether cpu supports nxe bit
2023-07-13 14:24:58 +03:00
65559a3e44
Kernel: Fix multiple bugs with terminal
2023-07-13 13:09:52 +03:00
c3a71e94a9
Kernel: Fix ATA disk and partition numbering
2023-07-13 12:12:47 +03:00
00409ffa60
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
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
ee4ef6638c
Kenrel: RamInode now implements truncate()
2023-07-10 16:07:09 +03:00
0910958c04
Kernel: OpenFileDescriptors can now store more than 8 bits of flags
2023-07-10 16:06:36 +03:00
d6408bcf17
Kernel: add O_TRUNC
...
this is not supported by anything yet
2023-07-10 15:48:18 +03:00
178fc00905
Kernel: creat() mode now has to be access mode
...
We provide the S_IFREG in creat
2023-07-10 15:34:41 +03:00
89d4fa4d9b
Kernel: Ext2 fill now return ENOTSUP on write
...
We used to crash the kernel
2023-07-10 15:34:25 +03:00
46e1419e70
Kernel: O_APPEND is now supported
2023-07-10 15:11:27 +03:00
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
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
74fc0aa308
Kernel: Inode::create_file() now takes uid and gid as parameters
2023-07-10 13:32:10 +03:00
d5f0448e48
Kernel: start work on ram file system
2023-07-10 13:26:14 +03:00
d713f252aa
Kenrel: Fix inode comparison
...
We should not compare rdevs
2023-07-10 11:48:11 +03:00
5ec2d85081
Kernel: Inode rename directory functions
2023-07-10 11:48:11 +03:00
0d132ee518
Kernel: Mark Ext2 classes final
2023-07-10 11:48:11 +03:00
80c8d52dc5
Kernel: add more functionality to PCI
2023-07-09 23:04:11 +03:00
b6c4a2dbf1
Kernel: Edit lock scopes and make string copy able to fail
2023-07-07 23:12:19 +03:00
a2f5ad7bed
Kernel: Move open file descriptors to their own class
...
This simplifies code a lot :)
2023-07-07 23:11:37 +03:00
07fec6e211
Kernel/LibC: add basic dup2
2023-07-06 23:17:54 +03:00
4cd72992c8
Kernel/LibC: Add basic pipe() syscall and command
...
You can now create pipes :)
2023-07-06 22:16:26 +03:00
5a8eb51968
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
a74422281f
Kernel: Add O_CLOEXEC
2023-07-06 20:00:33 +03:00
a45f9ee76b
Kernel: Remove spammy process/thread exit printing
2023-07-06 10:34:46 +03:00
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
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
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
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
09c824b90e
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
57e59d998f
Kernel: Add enum for ISR name to number
2023-06-18 23:24:27 +03:00
44fb3945df
Kernel: General allocator takes first valid vaddr as parameter
2023-06-17 22:23:34 +03:00
95c4e608de
Kernel: Move print during boot
2023-06-12 23:45:36 +03:00
5dcc53bcf2
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
23543b15ca
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
2253c45feb
Kernel: Remove Shell from kernel
...
This is now obsolete since we have a userspace Shell.
2023-06-12 02:04:52 +03:00
f09b82c4b5
Kernel/LibC: add SYS_{SET,GET}_PWD and chdir, getpwd
2023-06-12 02:02:52 +03:00
7aeb8e4d36
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
58ec4d6a31
Kernel: Fix bug in elf loading
...
We were allocating one extra page
2023-06-12 00:59:19 +03:00
11b68f6a53
Kernel: Add SYS_GET_{,E}{UID,GID}
2023-06-11 22:37:00 +03:00
3fe67e4882
Kernel: Add syscalls for set{,e,re}{uid,gid}
2023-06-11 22:37:00 +03:00
78536f9678
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
c7ec19c25c
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
3181ea7b4d
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
83a6e6f637
LibC: Reorder some syscalls
2023-06-11 03:29:22 +03:00
64890bb640
Kernel: Add SYS_OPENAT
2023-06-11 03:29:22 +03:00
caca6dc701
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
aa86125f2b
Kernel: Implement SYS_FSTAT
2023-06-11 03:29:22 +03:00
14aeb8de10
Kernel: we don't panic anymore on unrecognized syscall
2023-06-11 00:18:48 +03:00
691b17e0cc
Kernel: allow open() call with O_SEARCH
2023-06-11 00:18:34 +03:00
eae6119039
Kernel: Add syscall for reading directory entries
2023-06-11 00:18:08 +03:00
01311b470f
Kernel: Rewrite directory listing so it can be integrated to libc
2023-06-11 00:17:18 +03:00
4cdeb98897
Kernel: We now store the processes exit code
2023-06-10 17:31:56 +03:00
c0fe4756cb
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
5032e79be3
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
1aec3fcedd
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
aec63081e2
Kenrel: Rename Scheduler::reschedule -> Scheduler::timer_reschedule
2023-06-09 00:41:43 +03:00
801025ad7b
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
59b10c4d25
Kernel: PageTableScope locks the PageTable before disabling interrupts
...
This allows replacing some PageTableScopes with PageTable::lock()
2023-06-09 00:34:41 +03:00
841584ccbd
Kernel: get_free_contiguous_pages works with non-page aligned addresses
...
also fix bug in ordering
2023-06-06 02:03:23 +03:00
24993f6020
LibC: implement setenv, unsetenv, putenv
2023-06-05 22:51:02 +03:00
55ea5c5488
Kernel: add basic support for environment variables
...
exec functions will search files from PATH
2023-06-05 22:51:02 +03:00
c6b5cc1e07
Kernel: exec now has better posix errors
2023-06-05 21:12:08 +03:00
896b919c9d
Kernel/LibC: pass environ pointer to process
2023-06-05 21:12:08 +03:00
6b73f4d187
Kernel: TTY now actually flushes on ^D
2023-06-05 20:21:46 +03:00
08a806e75d
Kernel: verify that loaded elfs are executable
2023-06-05 19:29:32 +03:00
cf88142856
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
d1ad38c8d4
Kernel/LibC: add SYS_STAT and stat(), lstat()
2023-06-05 14:37:14 +03:00
9fbb2b9369
Kernel: Add SYS_WAIT
...
This syscall waits for a given pid.
2023-06-04 18:00:52 +03:00
a3aca67eef
Kernel: fork() now clones current thread
...
This is how posix specifies thread cloning during fork
2023-06-04 17:40:37 +03:00
977652ad57
Kernel: Process FixedWidthAllocators come now in 4 sizes
2023-06-04 01:26:43 +03:00
5bf7ca1c80
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
1b1f22c35e
Kernel: make load_elf() its own function
2023-06-04 01:24:11 +03:00
479817231a
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
e3c5477df4
Kernel: reorder process exit steps
2023-06-04 01:19:04 +03:00
b403155ca9
Kernel: You can specify first vaddr for getting free pages
2023-06-04 01:15:48 +03:00
5f339d585c
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
b168462b43
Kernel: PageTable now has debug_dump
...
This dumps all the mapped pages and their flags
2023-06-03 20:08:13 +03:00
68691faca1
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
9228df0f23
Kernel: Inode/Device detection is done with overridden bool functions
2023-06-03 13:28:15 +03:00
402ad85583
Kernel: Heap will return 0 if no free page is available
2023-06-03 02:55:31 +03:00
53e91ba98a
Kernel: DiskCache will try to shrink_to_fit after cache cleanup
2023-06-03 02:55:22 +03:00
fd153f3762
Kernel: DiskCache won't crash when running out of kmalloc memory
2023-06-03 02:36:20 +03:00
813d0f1b5f
Kernel: add basic disk cache
...
ATADevices now add disk cache to themselves
2023-06-03 02:23:14 +03:00
2b901abfb1
Kernel: Shell 'memory' now prints heap memory usage
2023-06-03 02:22:18 +03:00
8645c4c653
Kernel: Shell ls and stat now properly show symlinks
2023-06-02 18:22:56 +03:00
7aea8c45f7
Kernel: VFS now has max link depth of 100
2023-06-02 12:50:40 +03:00
7bbdee6cc4
Kernel: Symlinks are now working
...
We still have to implement loop or depth detection
2023-06-02 11:43:46 +03:00
ff548bd898
Kernel: Shell can now list symlinks
2023-06-01 00:25:53 +03:00
835d32814d
Kernel: add basic support for symlinks
2023-06-01 00:24:45 +03:00
79d1f665f2
Kernel: Shell opens standard files
2023-05-31 23:14:15 +03:00
1daa1f5611
Kernel: Cleanup exec code
2023-05-31 22:36:05 +03:00
24a190d1f7
Kernel: Add SYS_EXEC syscall
2023-05-31 20:57:33 +03:00
b48b239882
Kernel: Implement Process::exec()
2023-05-31 20:56:29 +03:00
5fb69300ca
Kernel: Move userspace entry functions to Process instead of Thread
2023-05-31 19:31:10 +03:00
dcb23f686f
Kernel: boot.S maps GiB as single pdpte
2023-05-31 00:51:15 +03:00
650570e57d
Kernel: Fix comment
2023-05-31 00:51:15 +03:00
1f5a36f074
Kernel: PageTable destructor works now
...
we are successfully booting higher half kernel now :)
2023-05-31 00:44:14 +03:00
aeaf2cd3f1
Kernel: PageTable::create_userspace() now works
2023-05-31 00:44:14 +03:00
959c0fc572
Kernel: kmalloc free error prints the pointer
2023-05-31 00:34:56 +03:00
e3d3788f28
Kernel: RSDP location is now done with virtual addresses
2023-05-31 00:34:21 +03:00
850b7f27a2
Kernel: Physical range now calculates RAM with physical addresses
2023-05-31 00:33:44 +03:00
0939f23b04
Kernel: Heap gets multiboot pointer with P2V
2023-05-30 23:57:44 +03:00
67886b0c5a
Kernel: Move V2P and P2V to Memory/Types.h
2023-05-30 23:57:03 +03:00
56eb6fb4ce
Kernel: PageTable::map_range_at maps correctly the last page
2023-05-30 23:56:07 +03:00
81cf389754
Kernel: Booting with higher half kernel gets to Heap initialization
2023-05-30 22:21:12 +03:00
0907965dc5
Kernel: start work on higher half kernel
2023-05-30 08:00:17 +03:00
210d90ec79
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
8bea18a6f2
Kernel: Remove unused includes of CriticalScope
2023-05-29 21:15:55 +03:00
861966eed6
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
5bb1f2a48c
Kernel: Rename MMU to PageTable
...
This is more descriptive name for what it actually represents
2023-05-29 21:06:09 +03:00
fb17af4844
Kernel/LibC: opening standard files is done in libc
2023-05-29 20:21:19 +03:00
b8ec8918b7
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
ff83f967d8
Kernel: Make RecursiveSpinLock thread safe
...
also SpinLock is now implemented with gcc builtins
2023-05-29 19:38:09 +03:00
998999a755
Kernel: Add SYS_SLEEP
2023-05-28 22:34:48 +03:00
09666adc53
Kernel: fork() now copies allocations through FixedWidthAllocator
2023-05-28 21:34:35 +03:00
ec73db0057
Kernel: Move page macros to Types.h
2023-05-28 21:03:08 +03:00
833642d405
Kernel: ISR will now crash userspace process instead of panicing kernel
2023-05-28 20:53:10 +03:00
f04399c3a0
Kernel: fork() now copies allocation done through GeneralAllocator
2023-05-28 20:37:39 +03:00
f2d767b799
Kernel: Add bareboness fork() function
2023-05-28 18:08:49 +03:00
3e93dae53c
Kernel: Add invalidate() to MMU
2023-05-28 18:05:49 +03:00
187bb046aa
Kernel: fix MMU::map_page_at()
...
We used to only reassign if flags changed
2023-05-28 17:57:05 +03:00
b021d3eebd
Kernel: Processes and Threads use VirtualRange memory allocations
2023-05-28 17:48:34 +03:00
15842db83e
Kernel: Move PhysicalRange to its own file and add VirtualRange
2023-05-28 17:48:34 +03:00
869de7283f
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
eb24d32383
Kernel: Directory listing is working again
2023-05-26 22:31:21 +03:00
565e3db22d
Kernel: kmalloc debug_dump is marked [[maybe_unused]]
2023-05-26 22:31:21 +03:00
faf14b880e
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
27147790fd
Userspace: Start work on shell
2023-05-26 22:31:21 +03:00
1658e925f2
Kernel: Add bareboness possibility to set termios
2023-05-26 22:31:21 +03:00
80d9f6131b
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
e0a72defa2
Kernel: Add argc and argv to process entry
2023-05-16 00:27:49 +03:00
e0a7e242f8
Kernel: Add MMUScope
...
This disables interrupts and loads specified mmu for the
scope it lives in
2023-05-16 00:26:39 +03:00
6acb86c14b
Kernel: MMU keeps track of the current
2023-05-16 00:26:39 +03:00
ec316391c5
Kernel: argc is passed as zero to userspace
2023-05-11 18:28:32 +03:00
177b205c48
BuildSystem: userspace has cmake target
2023-05-11 16:19:53 +03:00
729ff267d7
LibC: add function declarations to sys/stat.h
2023-05-11 15:11:33 +03:00
ff2e2937a5
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
512be884ed
Kernel: Add barebones GeneralAllocator for >4096B
2023-05-08 22:10:49 +03:00
f1667b398a
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
b0ec0f1a1a
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
12e42f40c5
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
890aa9aa15
BuildSystem: linker -O2 doesn't do anything? hopefully
2023-05-06 19:58:08 +03:00
bcfd838131
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
9c07add00f
Kernel: Invalid physical addresses from heap are specified now by 0
2023-05-06 17:34:22 +03:00
ab8aac7dcf
Kernel: GDT tss selector is now 16 bit value
2023-05-06 17:34:22 +03:00
f36b94d039
Kernel: MMU can now provide info about virtual address space
2023-05-06 17:34:22 +03:00
92daa831d1
Kernel: ISRs now print pid and tid
2023-05-06 00:10:15 +03:00
e7a170c89f
Kernel: 64 bit MMU now properly identity maps kernel
2023-05-05 14:19:28 +03:00
3c5d3eb8ad
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
55bb0084aa
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
acf5660090
Kernel: Add set_tss_stack() to 32 bit
2023-04-28 14:44:23 +03:00
9d7530662f
Kernel: dprintln file name is now relative
...
This makes file names much shorter
2023-04-28 14:43:19 +03:00
a22caa38d2
Kernel: Scheduler updates tss stack on thread execution
2023-04-25 14:49:50 +03:00
dc0f8b383f
Kernel: Usespace threads now have an interrupt stack
2023-04-25 14:49:18 +03:00
f1a0625b61
Kernel: TSS stack can be set after initialization
2023-04-25 14:48:12 +03:00
02b961fd7e
Kernel: Stack pointer out of bounds now panics with a message
2023-04-25 13:40:55 +03:00
6e01e04922
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
b7c2ea8d46
Kernel: Fix possible dead lock in Process::read()
2023-04-23 14:46:18 +03:00
cd74b2167d
LibC: Write mostly functioning stdio
2023-04-23 14:32:37 +03:00
9b2a577fc3
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
2dd09163e6
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
fb6add2b4a
Kernel: Fix 32 bit MMU
2023-04-22 18:22:39 +03:00
48445f12ac
Kernel: More proper paging in Elf loading
2023-04-22 18:17:44 +03:00
792fad2a03
Kernel: d{print,warn,error}ln(...) now has a spinlock
2023-04-22 17:58:51 +03:00
cc04990ce3
Kernel: Process now frees up its pages on destruction
2023-04-22 16:54:46 +03:00
7530482cc2
Kernel: Cleanup process creation for userspace
2023-04-22 16:51:50 +03:00
33d8c518e9
Kernel: Fix some deadlocks in the Process
2023-04-22 16:19:57 +03:00
e0ce2394fe
Kernel: Remove obsolete userspace stuff from kernel
2023-04-22 15:38:45 +03:00
fadce063a7
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
26fe6ad898
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
fc71d2f7c4
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
35e949ef5e
Kernel: Fix syscall return value in 32 bit
2023-04-21 11:08:02 +03:00
9c506ef85b
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
b1c7af38d0
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
ea0c9b639f
Kernel: Add some bareboness functionality to map virtual addresses
2023-04-19 23:51:36 +03:00
0030f035be
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
c26529ae86
Kernel: kmalloc will always print debug on failed alloc
2023-04-19 18:05:01 +03:00
e8a0df54b1
Kernel: ATAController will fail to initialize in native mode
2023-04-19 17:29:36 +03:00
33393335c8
Kernel: PCI devices now report their prog_if
2023-04-19 16:43:05 +03:00
c5b02bb9f5
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
a1047918d2
Kernel: Shell now has exit() command
2023-04-19 12:53:09 +03:00
fd81e31050
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
dcce18799f
Kernel: We now launch Shell again on boot
...
Adding this just before push :D
2023-04-19 00:41:24 +03:00
a9a15ea2c0
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
d63716db96
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
96ac072166
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
295a27f16a
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
88f60b5e41
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
d23604b0d5
Kernel: Handle some Heap edge cases
2023-04-18 10:18:15 +03:00
c5347e6707
Kernel: Reorder boot initialization
...
We now create the TTY as soon as possible so we can show console
output without serial port.
2023-04-18 10:18:15 +03:00
bf0c7b9ae8
Kernel: Heap implementation can now give free pages from all of RAM
2023-04-18 10:18:15 +03:00
0374b68fa1
Kernel: Remove unused file
2023-04-18 10:18:15 +03:00
633929629c
Kernel: Start working on heap
2023-04-18 10:18:15 +03:00
6a3b3213cf
Kernel: Kmalloc now has its memory statically allocated
...
We don't use the memory map given by bootloader since this automatically
maps the memory to a available space.
2023-04-18 10:18:15 +03:00
fdb4eb6042
Kernel: Move kmalloc and MMU to Memory directory
2023-04-18 10:18:15 +03:00
998ae511a3
LibELF: Start implementing elf library
2023-04-18 10:18:15 +03:00
3f9d6f0311
LibC: add needed stubs to build executables with our compiler
2023-04-12 17:53:02 +03:00
8ee63f8264
Kernel: We can create basic userspace processes
...
These are still allocated on the kernel memory
2023-04-12 17:52:36 +03:00
34358b8471
Kernel: Scheduler can now terminate processes threads
2023-04-12 17:49:04 +03:00
5b1af4ec47
Kernel: Debug::dump_stack_trace now 'detects' repeating function
2023-04-12 01:32:41 +03:00
071d7af58a
Kernel: kmalloc does not check for corruptiong unless it cannot allocate
...
We 'don't care' if kmalloc is corrupted unless it prevents us from
allocating memory. Scheduler should be catching stack overflows either
way and is much more efficient
2023-04-12 00:24:02 +03:00
3201c3654e
Kernel: Threads now use only 4 KiB stack :)
2023-04-12 00:22:08 +03:00
6ed3023725
Kernel: Fix TTY spinlock usage
2023-04-12 00:20:04 +03:00
892a63aec5
Kernel: Shell TTY_PRINT is now function instead of macro
...
This makes functions uses way less stack
2023-04-12 00:18:58 +03:00
3fe889d4a4
BuildSystem: GCC will now complain on functions with 1 KiB stack
2023-04-12 00:18:06 +03:00
cafd546ce8
Kernel: kmalloc now detects corruption
...
Kmalloc checks if its nodes have corrupted. This was happening
because of stack overflow.
2023-04-11 23:36:46 +03:00
5810a77cbf
Kernel: Mark Scheduler::start() as noreturn as appropriate
2023-04-11 23:33:20 +03:00
6f7045ead2
Kernel: kernel doesn't allocate large blocks of data on stack
...
We used to allocate 1 KiB blocks on multiple places on stack. This
is a problem, since kernel stack shouldn't have to be too big
2023-04-11 23:31:58 +03:00
40f9a42c00
Kernel: Scheduler will panic if it encounters stack overflow
2023-04-11 23:29:21 +03:00
9abe1f27bb
Kernel: Process now locks the mutex while modifying open files
...
This allows processes to be actually removed from the list instead
of dead locking
2023-04-11 23:28:16 +03:00
aa2aee684b
Kernel: remove message from BAN::Error
...
We don't store the error message anymore in BAN::Error.
Instead we store a error code that can be mapped into a string.
This allows BAN::Error to only take 4 bytes instead of 128.
We should also make some kernel initialization just panic instead
of returning errors since they are required for succesfull boot
anyway.
2023-04-11 23:25:21 +03:00
cfa025acae
BAN: Move RefPtr to its own file and create New.h
...
New.h contains definitions for placement new operators and
BAN::allocator and BAN::dealloctor
2023-04-10 21:07:25 +03:00
781cc78a1f
BuildSystem: Fix header copying to sysroot
...
We used to copy all headers everytime to sysroot which caused
rebuild of the whole os. Now we use the cmake command
'copy_directory_if_different' which seemed to fix this issue :)
2023-04-10 21:07:25 +03:00
f924ac9265
Kernel: Threads can now be terminated mid execution
2023-04-10 21:07:25 +03:00
df6e8a6562
Kernel: Add small wait in ATA driver before reading/writing
...
This allows bochs to boot again
2023-04-10 21:07:25 +03:00
3f01f936a1
Kernel: Fix framepointers on started threads
2023-04-10 21:07:25 +03:00
25ddc24754
BuildSystem: cmake can now build out libc
...
I can't seem to get libc++ build to work...
2023-04-10 21:07:25 +03:00
3fbee2c835
BuildSystem: remove now obsolete include directories from kernel build
2023-04-07 02:25:47 +03:00
2a8dc58b6a
BuildSystem: Cleanup cmake code
...
The buildsystem is kind of a mess. I will be writingn build
instructions soon.
2023-04-06 20:31:10 +03:00
8a8793fd2d
BuildSystem: you can now build the toolchain with cmake
2023-04-06 00:23:02 +03:00
9e0b4132ee
Kernel: Shell now somewhat functions again
...
I will not be fixing the shell implementation until I get to
userspace
2023-04-05 11:37:41 +03:00
68158324f4
Kernel: Fix TTY echo and canonical flag behaviour
2023-04-05 11:35:19 +03:00
a420be6b20
Kernel: Fix ansi control sequence cursor movement
2023-04-05 03:07:52 +03:00
f281543255
Kernel: Add tty to process and make termios modifiable
2023-04-05 02:53:28 +03:00
dcf0969e2d
Kernel: TTY now supports clearing
2023-04-05 02:04:18 +03:00
4f522d337a
Kernel: Add partial support for shell
...
We don't handle arrow keys, and the tty does not know how to clear
the screeen :D
2023-04-05 01:30:58 +03:00
af0979ec32
Kernel: Process can now initialize stdio
...
This allows the use of the fds STD{IN,OUT,ERR}_FILENO
2023-04-05 01:10:25 +03:00
7f95444bb5
Kernel: Start work on making tty a file
...
TTY is now a file that you can read from/write to. I still have
to port shell to use this new interface
2023-04-05 00:56:09 +03:00
783842bac2
Kernel: add virtual write function to inode
2023-04-03 20:29:07 +03:00
e1534ad25b
Kernel: Fix keys in PS2Keymap
2023-04-03 20:25:23 +03:00
ee1f3623ce
Kernel: Fix typo
2023-04-03 19:56:55 +03:00
dffdb51713
BuildSystem: remove non-existent file from kernel CMakeLists.txt
2023-04-03 19:02:25 +03:00
b87dae7e7c
Kernel: Device dev and rdev number is done more properly
...
Also hd* partitions are now 1 indexed instead of 0
2023-04-03 11:43:16 +03:00
2ffee63889
Kernel: Cleaner partition parsing errors
2023-04-03 09:55:49 +03:00
c936aac777
Kernel: Optimize scheduler idling
...
Now after each interrupt we will ask the scheduler to reschedule
if the current thread is the idle thread. This allows semaphore
unblocking to be practically instant when there is only one thread
executing.
Now disk reading is back to ~3 MB/s for single threaded process
2023-04-03 01:51:05 +03:00
46d65471d9
Kernel: ATA now uses irqs instead of polling
...
Reading is now much slower at ~500 kB/s it was around 3 MB/s.
This is probably mostly due semaphore blocking taking atleast
until next reschedule (1 ms itervals). This will be a problem
as long as we are using only single processor.
I could try to use {READ/WRITE}_MULTIPLE commands, but since
most of the disk reads are 2 sectors (inode block size) this
will at most double the speed.
Most efficient speed up would of course be caching disk access
data and inodes overall.
2023-04-03 00:03:38 +03:00
dcc174b62e
Kernel: Move ATADevice to its own file from ATAController
...
The API is kinda weird since device reads/writes go from
ATADevice -> ATAController -> ATADevice
but this is for now atleast necessary since ATAController has(?)
to keep all devices from using the disks at the same time
2023-04-02 18:26:19 +03:00
bdc7a99c59
Kernel: ATA controller waits now before read/write until disk is ready
...
Qemu used to freeze on disk writes but now it seems fine
2023-04-02 05:37:17 +03:00
2aad357c18
BuildSystem: building for 32-bit works now
2023-04-02 05:03:17 +03:00
4c5176f751
BuildSystem: We are now using cmake instead of plain make
...
I have been annoyed for a while since I had to build everything
when running the os since the buildsystem was really bad.
I wanted to rewrite the whole build system and changed to using cmake
:)
2023-04-02 04:07:27 +03:00
cbb0f6be9a
Kernel: cleanup includes
...
I went quickly went through all files since I found some weird
includes :D
2023-04-01 02:14:49 +03:00
a60f8098ee
Kernel: Fix traversing back from mount points
2023-04-01 01:54:35 +03:00
8bffbf64b9
Kernel: Add inodes '.' and '..' to device manager
2023-04-01 01:33:04 +03:00
d91a5bccf4
Kernel: Reads return 0 bytes read at the end of device
...
We used to not have any idea if we where already at the end of device.
Also fixed couple of copy-paste errors from read->write
2023-04-01 00:55:07 +03:00
1ca0d3a3c1
Kernel: Shell cleanup cat command
2023-04-01 00:54:39 +03:00
653f688567
Kernel: Shell 'time' prints the time even if command fails
2023-04-01 00:30:33 +03:00
8b5d8d9f8a
Kernel: Process gets absolute paths for mount
2023-04-01 00:30:11 +03:00
c45ada6ccb
Kernel: fix ext2 failed creation memory leak
2023-04-01 00:22:03 +03:00
db65cfeb8a
Kernel: Cleanup ATA device initialization
2023-03-31 00:58:57 +03:00
a3ba6da6f3
Kernel: Move DeviceManager to its own file
2023-03-30 22:39:45 +03:00
b048630e5b
Kernel: Improve locking in Process, VFS and ATAController
...
We used to block on all process access. This meant that shell
reading the keyboard input would block all VFS access making disk
accesses practically impossible. We now block only when it is
necessary :)
2023-03-30 22:02:16 +03:00
dcee92a6bc
Kernel: Thread is no longer RefCounted
...
This makes developement with Scheduler much easier against compiler
optimizations. I could now remove the pragma GCC optimize stuff.
2023-03-30 19:16:51 +03:00
c2e3b422cc
Kernel: Add Semaphore to block threads
2023-03-30 18:46:33 +03:00
d4c03d3939
Kernel: root partition is now passed from the commandline
2023-03-30 18:46:19 +03:00
Bananymous