Commit Graph

890 Commits

Author SHA1 Message Date
Bananymous abe8810d47 Kernel: raise() now force sends signal 2023-07-30 14:17:07 +03:00
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 9279bbbd19 Kernel: TTY now sends SIGINT on ^C to foreground process 2023-07-28 18:10:09 +03:00
Bananymous 9fd9a8b5b1 Kernel: Mark reading section from StorageDevice as terminate critical 2023-07-28 18:09:35 +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 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
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 7b4a2fe3d1 Kernel: Process::exit() unblocks the whole lock before blocking 2023-07-24 22:29:59 +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 d560137ae6 Kernel/LibC: add SYS_SIGNAL/signal() 2023-07-21 20:08:13 +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 70f89ed1fc BuildSystem: Strip kernel. We will add the map once we use it 2023-07-21 15:47:31 +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 a1db032ba9 Kernel: kernel memory takes now full pml4e
This allows flags to work properly
2023-07-21 13:47:05 +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 c0029a2fa2 Kernel: Don't map kernel executable memory as writable 2023-07-21 11:17:39 +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 94af856db0 Kernel: cleanup sys_exec()
We now scope everyting so desctructors get called
2023-07-19 23:20:39 +03:00
Bananymous 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
Bananymous fd9210ba9e Kernel: FixedWidthAllocator creation can now fail 2023-07-19 18:07:24 +03:00
Bananymous 66d9260257 Kernel: VirtualRange creation can fail 2023-07-19 17:56:26 +03:00
Bananymous 5d2bfc858e Kernel: SYS_FORK can now fail instead of panicing on error 2023-07-19 17:47:12 +03:00
Bananymous 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
Bananymous 98c698d9ec Kernel: Enable global bit on kernel pages 2023-07-13 15:23:25 +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 c3a71e94a9 Kernel: Fix ATA disk and partition numbering 2023-07-13 12:12:47 +03:00
Bananymous 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
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 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
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 46e1419e70 Kernel: O_APPEND is now supported 2023-07-10 15:11:27 +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 b6c4a2dbf1 Kernel: Edit lock scopes and make string copy able to fail 2023-07-07 23:12:19 +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 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
Bananymous a74422281f Kernel: Add O_CLOEXEC 2023-07-06 20:00:33 +03:00
Bananymous a45f9ee76b Kernel: Remove spammy process/thread exit printing 2023-07-06 10:34:46 +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
Bananymous 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
Bananymous 57e59d998f Kernel: Add enum for ISR name to number 2023-06-18 23:24:27 +03:00
Bananymous 44fb3945df Kernel: General allocator takes first valid vaddr as parameter 2023-06-17 22:23:34 +03:00
Bananymous 95c4e608de Kernel: Move print during boot 2023-06-12 23:45:36 +03:00
Bananymous 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
Bananymous 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
Bananymous 2253c45feb Kernel: Remove Shell from kernel
This is now obsolete since we have a userspace Shell.
2023-06-12 02:04:52 +03:00
Bananymous f09b82c4b5 Kernel/LibC: add SYS_{SET,GET}_PWD and chdir, getpwd 2023-06-12 02:02:52 +03:00
Bananymous 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
Bananymous 58ec4d6a31 Kernel: Fix bug in elf loading
We were allocating one extra page
2023-06-12 00:59:19 +03:00
Bananymous 11b68f6a53 Kernel: Add SYS_GET_{,E}{UID,GID} 2023-06-11 22:37:00 +03:00
Bananymous 3fe67e4882 Kernel: Add syscalls for set{,e,re}{uid,gid} 2023-06-11 22:37:00 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 83a6e6f637 LibC: Reorder some syscalls 2023-06-11 03:29:22 +03:00
Bananymous 64890bb640 Kernel: Add SYS_OPENAT 2023-06-11 03:29:22 +03:00
Bananymous 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
Bananymous aa86125f2b Kernel: Implement SYS_FSTAT 2023-06-11 03:29:22 +03:00
Bananymous 14aeb8de10 Kernel: we don't panic anymore on unrecognized syscall 2023-06-11 00:18:48 +03:00
Bananymous 691b17e0cc Kernel: allow open() call with O_SEARCH 2023-06-11 00:18:34 +03:00
Bananymous eae6119039 Kernel: Add syscall for reading directory entries 2023-06-11 00:18:08 +03:00
Bananymous 01311b470f Kernel: Rewrite directory listing so it can be integrated to libc 2023-06-11 00:17:18 +03:00
Bananymous 4cdeb98897 Kernel: We now store the processes exit code 2023-06-10 17:31:56 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous aec63081e2 Kenrel: Rename Scheduler::reschedule -> Scheduler::timer_reschedule 2023-06-09 00:41:43 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 24993f6020 LibC: implement setenv, unsetenv, putenv 2023-06-05 22:51:02 +03:00
Bananymous 55ea5c5488 Kernel: add basic support for environment variables
exec functions will search files from PATH
2023-06-05 22:51:02 +03:00
Bananymous c6b5cc1e07 Kernel: exec now has better posix errors 2023-06-05 21:12:08 +03:00
Bananymous 896b919c9d Kernel/LibC: pass environ pointer to process 2023-06-05 21:12:08 +03:00
Bananymous 6b73f4d187 Kernel: TTY now actually flushes on ^D 2023-06-05 20:21:46 +03:00
Bananymous 08a806e75d Kernel: verify that loaded elfs are executable 2023-06-05 19:29:32 +03:00
Bananymous 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
Bananymous d1ad38c8d4 Kernel/LibC: add SYS_STAT and stat(), lstat() 2023-06-05 14:37:14 +03:00
Bananymous 9fbb2b9369 Kernel: Add SYS_WAIT
This syscall waits for a given pid.
2023-06-04 18:00:52 +03:00
Bananymous a3aca67eef Kernel: fork() now clones current thread
This is how posix specifies thread cloning during fork
2023-06-04 17:40:37 +03:00
Bananymous 977652ad57 Kernel: Process FixedWidthAllocators come now in 4 sizes 2023-06-04 01:26:43 +03:00
Bananymous 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
Bananymous 1b1f22c35e Kernel: make load_elf() its own function 2023-06-04 01:24:11 +03:00
Bananymous 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
Bananymous e3c5477df4 Kernel: reorder process exit steps 2023-06-04 01:19:04 +03:00
Bananymous b403155ca9 Kernel: You can specify first vaddr for getting free pages 2023-06-04 01:15:48 +03:00
Bananymous 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
Bananymous b168462b43 Kernel: PageTable now has debug_dump
This dumps all the mapped pages and their flags
2023-06-03 20:08:13 +03:00
Bananymous 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
Bananymous 9228df0f23 Kernel: Inode/Device detection is done with overridden bool functions 2023-06-03 13:28:15 +03:00
Bananymous 402ad85583 Kernel: Heap will return 0 if no free page is available 2023-06-03 02:55:31 +03:00
Bananymous 53e91ba98a Kernel: DiskCache will try to shrink_to_fit after cache cleanup 2023-06-03 02:55:22 +03:00
Bananymous fd153f3762 Kernel: DiskCache won't crash when running out of kmalloc memory 2023-06-03 02:36:20 +03:00
Bananymous 813d0f1b5f Kernel: add basic disk cache
ATADevices now add disk cache to themselves
2023-06-03 02:23:14 +03:00
Bananymous 2b901abfb1 Kernel: Shell 'memory' now prints heap memory usage 2023-06-03 02:22:18 +03:00
Bananymous 8645c4c653 Kernel: Shell ls and stat now properly show symlinks 2023-06-02 18:22:56 +03:00
Bananymous 7aea8c45f7 Kernel: VFS now has max link depth of 100 2023-06-02 12:50:40 +03:00
Bananymous 7bbdee6cc4 Kernel: Symlinks are now working
We still have to implement loop or depth detection
2023-06-02 11:43:46 +03:00
Bananymous ff548bd898 Kernel: Shell can now list symlinks 2023-06-01 00:25:53 +03:00
Bananymous 835d32814d Kernel: add basic support for symlinks 2023-06-01 00:24:45 +03:00
Bananymous 79d1f665f2 Kernel: Shell opens standard files 2023-05-31 23:14:15 +03:00
Bananymous 1daa1f5611 Kernel: Cleanup exec code 2023-05-31 22:36:05 +03:00
Bananymous 24a190d1f7 Kernel: Add SYS_EXEC syscall 2023-05-31 20:57:33 +03:00
Bananymous b48b239882 Kernel: Implement Process::exec() 2023-05-31 20:56:29 +03:00
Bananymous 5fb69300ca Kernel: Move userspace entry functions to Process instead of Thread 2023-05-31 19:31:10 +03:00
Bananymous dcb23f686f Kernel: boot.S maps GiB as single pdpte 2023-05-31 00:51:15 +03:00
Bananymous 650570e57d Kernel: Fix comment 2023-05-31 00:51:15 +03:00
Bananymous 1f5a36f074 Kernel: PageTable destructor works now
we are successfully booting higher half kernel now :)
2023-05-31 00:44:14 +03:00
Bananymous aeaf2cd3f1 Kernel: PageTable::create_userspace() now works 2023-05-31 00:44:14 +03:00
Bananymous 959c0fc572 Kernel: kmalloc free error prints the pointer 2023-05-31 00:34:56 +03:00
Bananymous e3d3788f28 Kernel: RSDP location is now done with virtual addresses 2023-05-31 00:34:21 +03:00
Bananymous 850b7f27a2 Kernel: Physical range now calculates RAM with physical addresses 2023-05-31 00:33:44 +03:00
Bananymous 0939f23b04 Kernel: Heap gets multiboot pointer with P2V 2023-05-30 23:57:44 +03:00
Bananymous 67886b0c5a Kernel: Move V2P and P2V to Memory/Types.h 2023-05-30 23:57:03 +03:00
Bananymous 56eb6fb4ce Kernel: PageTable::map_range_at maps correctly the last page 2023-05-30 23:56:07 +03:00
Bananymous 81cf389754 Kernel: Booting with higher half kernel gets to Heap initialization 2023-05-30 22:21:12 +03:00
Bananymous 0907965dc5 Kernel: start work on higher half kernel 2023-05-30 08:00:17 +03:00
Bananymous 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
Bananymous 8bea18a6f2 Kernel: Remove unused includes of CriticalScope 2023-05-29 21:15:55 +03:00
Bananymous 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
Bananymous 5bb1f2a48c Kernel: Rename MMU to PageTable
This is more descriptive name for what it actually represents
2023-05-29 21:06:09 +03:00
Bananymous fb17af4844 Kernel/LibC: opening standard files is done in libc 2023-05-29 20:21:19 +03:00
Bananymous 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
Bananymous ff83f967d8 Kernel: Make RecursiveSpinLock thread safe
also SpinLock is now implemented with gcc builtins
2023-05-29 19:38:09 +03:00
Bananymous 998999a755 Kernel: Add SYS_SLEEP 2023-05-28 22:34:48 +03:00
Bananymous 09666adc53 Kernel: fork() now copies allocations through FixedWidthAllocator 2023-05-28 21:34:35 +03:00
Bananymous ec73db0057 Kernel: Move page macros to Types.h 2023-05-28 21:03:08 +03:00
Bananymous 833642d405 Kernel: ISR will now crash userspace process instead of panicing kernel 2023-05-28 20:53:10 +03:00
Bananymous f04399c3a0 Kernel: fork() now copies allocation done through GeneralAllocator 2023-05-28 20:37:39 +03:00
Bananymous f2d767b799 Kernel: Add bareboness fork() function 2023-05-28 18:08:49 +03:00
Bananymous 3e93dae53c Kernel: Add invalidate() to MMU 2023-05-28 18:05:49 +03:00
Bananymous 187bb046aa Kernel: fix MMU::map_page_at()
We used to only reassign if flags changed
2023-05-28 17:57:05 +03:00
Bananymous b021d3eebd Kernel: Processes and Threads use VirtualRange memory allocations 2023-05-28 17:48:34 +03:00
Bananymous 15842db83e Kernel: Move PhysicalRange to its own file and add VirtualRange 2023-05-28 17:48:34 +03:00
Bananymous 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
Bananymous eb24d32383 Kernel: Directory listing is working again 2023-05-26 22:31:21 +03:00
Bananymous 565e3db22d Kernel: kmalloc debug_dump is marked [[maybe_unused]] 2023-05-26 22:31:21 +03:00
Bananymous 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
Bananymous 27147790fd Userspace: Start work on shell 2023-05-26 22:31:21 +03:00
Bananymous 1658e925f2 Kernel: Add bareboness possibility to set termios 2023-05-26 22:31:21 +03:00
Bananymous 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
Bananymous e0a72defa2 Kernel: Add argc and argv to process entry 2023-05-16 00:27:49 +03:00
Bananymous 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
Bananymous 6acb86c14b Kernel: MMU keeps track of the current 2023-05-16 00:26:39 +03:00
Bananymous ec316391c5 Kernel: argc is passed as zero to userspace 2023-05-11 18:28:32 +03:00
Bananymous 177b205c48 BuildSystem: userspace has cmake target 2023-05-11 16:19:53 +03:00
Bananymous 729ff267d7 LibC: add function declarations to sys/stat.h 2023-05-11 15:11:33 +03:00
Bananymous 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
Bananymous 512be884ed Kernel: Add barebones GeneralAllocator for >4096B 2023-05-08 22:10:49 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 890aa9aa15 BuildSystem: linker -O2 doesn't do anything? hopefully 2023-05-06 19:58:08 +03:00
Bananymous 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
Bananymous 9c07add00f Kernel: Invalid physical addresses from heap are specified now by 0 2023-05-06 17:34:22 +03:00
Bananymous ab8aac7dcf Kernel: GDT tss selector is now 16 bit value 2023-05-06 17:34:22 +03:00
Bananymous f36b94d039 Kernel: MMU can now provide info about virtual address space 2023-05-06 17:34:22 +03:00
Bananymous 92daa831d1 Kernel: ISRs now print pid and tid 2023-05-06 00:10:15 +03:00
Bananymous e7a170c89f Kernel: 64 bit MMU now properly identity maps kernel 2023-05-05 14:19:28 +03:00
Bananymous 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
Bananymous 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
Bananymous acf5660090 Kernel: Add set_tss_stack() to 32 bit 2023-04-28 14:44:23 +03:00
Bananymous 9d7530662f Kernel: dprintln file name is now relative
This makes file names much shorter
2023-04-28 14:43:19 +03:00
Bananymous a22caa38d2 Kernel: Scheduler updates tss stack on thread execution 2023-04-25 14:49:50 +03:00
Bananymous dc0f8b383f Kernel: Usespace threads now have an interrupt stack 2023-04-25 14:49:18 +03:00
Bananymous f1a0625b61 Kernel: TSS stack can be set after initialization 2023-04-25 14:48:12 +03:00
Bananymous 02b961fd7e Kernel: Stack pointer out of bounds now panics with a message 2023-04-25 13:40:55 +03:00
Bananymous 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
Bananymous b7c2ea8d46 Kernel: Fix possible dead lock in Process::read() 2023-04-23 14:46:18 +03:00
Bananymous cd74b2167d LibC: Write mostly functioning stdio 2023-04-23 14:32:37 +03:00
Bananymous 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
Bananymous 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
Bananymous fb6add2b4a Kernel: Fix 32 bit MMU 2023-04-22 18:22:39 +03:00
Bananymous 48445f12ac Kernel: More proper paging in Elf loading 2023-04-22 18:17:44 +03:00
Bananymous 792fad2a03 Kernel: d{print,warn,error}ln(...) now has a spinlock 2023-04-22 17:58:51 +03:00
Bananymous cc04990ce3 Kernel: Process now frees up its pages on destruction 2023-04-22 16:54:46 +03:00
Bananymous 7530482cc2 Kernel: Cleanup process creation for userspace 2023-04-22 16:51:50 +03:00
Bananymous 33d8c518e9 Kernel: Fix some deadlocks in the Process 2023-04-22 16:19:57 +03:00
Bananymous e0ce2394fe Kernel: Remove obsolete userspace stuff from kernel 2023-04-22 15:38:45 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 35e949ef5e Kernel: Fix syscall return value in 32 bit 2023-04-21 11:08:02 +03:00
Bananymous 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
Bananymous 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
Bananymous ea0c9b639f Kernel: Add some bareboness functionality to map virtual addresses 2023-04-19 23:51:36 +03:00
Bananymous 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
Bananymous c26529ae86 Kernel: kmalloc will always print debug on failed alloc 2023-04-19 18:05:01 +03:00
Bananymous e8a0df54b1 Kernel: ATAController will fail to initialize in native mode 2023-04-19 17:29:36 +03:00
Bananymous 33393335c8 Kernel: PCI devices now report their prog_if 2023-04-19 16:43:05 +03:00
Bananymous 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
Bananymous a1047918d2 Kernel: Shell now has exit() command 2023-04-19 12:53:09 +03:00
Bananymous 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
Bananymous dcce18799f Kernel: We now launch Shell again on boot
Adding this just before push :D
2023-04-19 00:41:24 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous d23604b0d5 Kernel: Handle some Heap edge cases 2023-04-18 10:18:15 +03:00
Bananymous 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
Bananymous bf0c7b9ae8 Kernel: Heap implementation can now give free pages from all of RAM 2023-04-18 10:18:15 +03:00
Bananymous 0374b68fa1 Kernel: Remove unused file 2023-04-18 10:18:15 +03:00
Bananymous 633929629c Kernel: Start working on heap 2023-04-18 10:18:15 +03:00
Bananymous 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
Bananymous fdb4eb6042 Kernel: Move kmalloc and MMU to Memory directory 2023-04-18 10:18:15 +03:00
Bananymous 998ae511a3 LibELF: Start implementing elf library 2023-04-18 10:18:15 +03:00
Bananymous 3f9d6f0311 LibC: add needed stubs to build executables with our compiler 2023-04-12 17:53:02 +03:00
Bananymous 8ee63f8264 Kernel: We can create basic userspace processes
These are still allocated on the kernel memory
2023-04-12 17:52:36 +03:00
Bananymous 34358b8471 Kernel: Scheduler can now terminate processes threads 2023-04-12 17:49:04 +03:00
Bananymous 5b1af4ec47 Kernel: Debug::dump_stack_trace now 'detects' repeating function 2023-04-12 01:32:41 +03:00
Bananymous 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
Bananymous 3201c3654e Kernel: Threads now use only 4 KiB stack :) 2023-04-12 00:22:08 +03:00
Bananymous 6ed3023725 Kernel: Fix TTY spinlock usage 2023-04-12 00:20:04 +03:00
Bananymous 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
Bananymous 3fe889d4a4 BuildSystem: GCC will now complain on functions with 1 KiB stack 2023-04-12 00:18:06 +03:00
Bananymous 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
Bananymous 5810a77cbf Kernel: Mark Scheduler::start() as noreturn as appropriate 2023-04-11 23:33:20 +03:00
Bananymous 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
Bananymous 40f9a42c00 Kernel: Scheduler will panic if it encounters stack overflow 2023-04-11 23:29:21 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous f924ac9265 Kernel: Threads can now be terminated mid execution 2023-04-10 21:07:25 +03:00
Bananymous 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
Bananymous 3f01f936a1 Kernel: Fix framepointers on started threads 2023-04-10 21:07:25 +03:00
Bananymous 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
Bananymous 3fbee2c835 BuildSystem: remove now obsolete include directories from kernel build 2023-04-07 02:25:47 +03:00
Bananymous 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
Bananymous 8a8793fd2d BuildSystem: you can now build the toolchain with cmake 2023-04-06 00:23:02 +03:00
Bananymous 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
Bananymous 68158324f4 Kernel: Fix TTY echo and canonical flag behaviour 2023-04-05 11:35:19 +03:00
Bananymous a420be6b20 Kernel: Fix ansi control sequence cursor movement 2023-04-05 03:07:52 +03:00
Bananymous f281543255 Kernel: Add tty to process and make termios modifiable 2023-04-05 02:53:28 +03:00
Bananymous dcf0969e2d Kernel: TTY now supports clearing 2023-04-05 02:04:18 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 783842bac2 Kernel: add virtual write function to inode 2023-04-03 20:29:07 +03:00
Bananymous e1534ad25b Kernel: Fix keys in PS2Keymap 2023-04-03 20:25:23 +03:00
Bananymous ee1f3623ce Kernel: Fix typo 2023-04-03 19:56:55 +03:00
Bananymous dffdb51713 BuildSystem: remove non-existent file from kernel CMakeLists.txt 2023-04-03 19:02:25 +03:00
Bananymous 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
Bananymous 2ffee63889 Kernel: Cleaner partition parsing errors 2023-04-03 09:55:49 +03:00
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 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
Bananymous 2aad357c18 BuildSystem: building for 32-bit works now 2023-04-02 05:03:17 +03:00
Bananymous 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
Bananymous 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
Bananymous a60f8098ee Kernel: Fix traversing back from mount points 2023-04-01 01:54:35 +03:00
Bananymous 8bffbf64b9 Kernel: Add inodes '.' and '..' to device manager 2023-04-01 01:33:04 +03:00
Bananymous 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
Bananymous 1ca0d3a3c1 Kernel: Shell cleanup cat command 2023-04-01 00:54:39 +03:00
Bananymous 653f688567 Kernel: Shell 'time' prints the time even if command fails 2023-04-01 00:30:33 +03:00
Bananymous 8b5d8d9f8a Kernel: Process gets absolute paths for mount 2023-04-01 00:30:11 +03:00
Bananymous c45ada6ccb Kernel: fix ext2 failed creation memory leak 2023-04-01 00:22:03 +03:00
Bananymous db65cfeb8a Kernel: Cleanup ATA device initialization 2023-03-31 00:58:57 +03:00
Bananymous a3ba6da6f3 Kernel: Move DeviceManager to its own file 2023-03-30 22:39:45 +03:00
Bananymous 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
Bananymous 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
Bananymous c2e3b422cc Kernel: Add Semaphore to block threads 2023-03-30 18:46:33 +03:00
Bananymous d4c03d3939 Kernel: root partition is now passed from the commandline 2023-03-30 18:46:19 +03:00
Bananymous 8e68d2e3ea Kernel: Shell can now mount partitions 2023-03-30 15:06:41 +03:00
Bananymous 30c33b55e3 Kernel: Inode::Mode is now a struct so we can have functions in it 2023-03-30 14:41:15 +03:00
Bananymous e2791e5260 Kernel: StorageDevices and Controllers are now devices 2023-03-30 14:22:15 +03:00
Bananymous 88a8bd659d Kernel: Add IFBLK, IFLNK, IFSOCK to Inode::Mode 2023-03-30 13:15:46 +03:00
Bananymous f9cc114907 Kernel: All devices have atime, mtime, ctime at their creation 2023-03-30 13:15:46 +03:00
Bananymous 9a4d603a62 Kernel: Remove the mount test from VFS 2023-03-30 11:43:24 +03:00
Bananymous 78ea4b2207 Kernel: fix stat command and device numbers 2023-03-30 10:43:08 +03:00
Bananymous ab3cdea548 Kernel: Rewrite mounting code 2023-03-29 21:34:48 +03:00
Bananymous dd84a2175f Kernel: Move Partition out of StorageDevice and rename functions 2023-03-29 13:23:01 +03:00
Bananymous ae05ad3f38 Kernel: Shell commands 'ls' and 'stat' recognize character devices 2023-03-29 11:56:33 +03:00
Bananymous 62fb233eb1 Kernel: DeviceManager is now a 'FileSystem' so it can expose devices
Shell reads keyboard through /dev/input :)
2023-03-29 11:50:46 +03:00
Bananymous 426b1482dd Kernel: Fix keymap numlock behaviour 2023-03-29 03:18:22 +03:00
Bananymous 16d9d29971 Kernel: Remove obsolete KeyboardLayout/
This was used by the old input system. Currently keyboard layout is
hardcoded to finnish. But it will be reworked as something read from
the filesystem
2023-03-29 03:09:14 +03:00
Bananymous fa8e921ee8 Kernel: Rework the whole input system
We now use Device abstraction that will allow us to provide devices
to userspace through /dev. Currently Shell reads from first and only
device (it being PS/2 Keyboard).
2023-03-29 03:05:16 +03:00
Bananymous ea900ad744 Kernel: ACPI unmap_header does not do anything
We have to work with MMU mapping/unmapping to be user friendly
2023-03-28 02:56:44 +03:00
Bananymous c7286396d8 Kernel: Move ACPI to its own file 2023-03-27 17:30:45 +03:00
Bananymous 666051fd34 Kernel/BAN: move unix time conversion to BAN and add stat to Shell 2023-03-27 00:49:58 +03:00
Bananymous e55860eb6b Kernel: Rework processes and VFS so we don't expose inodes
Everything is now done through a file descriptor.
2023-03-26 04:30:57 +03:00
Bananymous 1fade1aa9e Kernel: Process::working_directory() is now thread safe
I realized you cannot return a stirng view and it to be thread safe
2023-03-24 01:46:25 +02:00
Bananymous 814f0b215d Kernel: Create RecursiveSpinLock and add it to Process
We now lock every function within Proccess, just to be sure.
Recursive lock allows us to use lock from the same thread even if
we already have the spinlock locked
2023-03-24 01:32:35 +02:00
Bananymous 5fd26b4ea8 Kernel: Lock process functions instead of the ata controller
Process has to use locks at least on some functions so multithreaded
disk io is safe. This seemed to fix corrupted reads from disk
2023-03-24 01:17:39 +02:00
Bananymous e5eab8bae4 Kernel: Ext2FS now does allocations better
We only have to allocate at the beginning of the all functions and
can properly exit before any disk reads if we run out of memory.

This makes development little bit 'harder' since the {read,write}_block
user must allocate a buffer of atleast block_size bytes.

I also made disk access to cause kernel panic on error since the error
handling during file write is something I don't want to think now.
The filesystem can easily corrupt so, I feel like when disk io starts
to fail I'll come back to this.
2023-03-23 23:22:31 +02:00
Bananymous 75c4f35e85 Kernel: Add possibiliity to create empty files on Ext2
Big rewrite for Ext2 for more easy and optimized code
2023-03-23 22:26:06 +02:00
Bananymous 633414bd20 Kernel: Remove block group descriptor cache from ext2fs
This will make improving the fs easier since we need to only update
the values on the disk
2023-03-23 18:52:58 +02:00
Bananymous 7ca6cd61be Kernel: Move get_unix_time to RTC namespace 2023-03-23 18:14:51 +02:00
Bananymous 3ef72e8a7b BAN: Modify Span constructors to keep constness correctly 2023-03-23 14:26:03 +02:00
Bananymous 9b56801c3d Kernel: StorageDevice and Ext2 "support" writing 2023-03-23 13:04:13 +02:00
Bananymous 5f6c58ffd2 Kernel: Shell now prints unix time with 'date' command 2023-03-23 11:13:51 +02:00
Bananymous 74949401bd Kernel: Cleanup GPT parsing code 2023-03-23 11:13:14 +02:00
Bananymous 4ffc69a6e4 Kernel: TTY buffer is resized on font size change
Shell also has better line wrapping. You still can't visually go
back to previous line, but atleas we now write from the beginning
of the line
2023-03-22 02:09:22 +02:00
Bananymous 61ac9833be Kernel: Reading from fd verifies that file is opened for reading 2023-03-22 01:55:58 +02:00
Bananymous dbf7d9f19e Kernel: Ext2 directory functions now fail on invalid blocks
Invalid blocks should only happen while writing to a file and
I think in that case we should just bail out instead of giving
you incomlete inode list or search result.
2023-03-22 01:55:57 +02:00
Bananymous a6e5a0b704 Kernel: cksum uses now a different crc32_table to match linux 'cksum' 2023-03-22 01:55:21 +02:00
Bananymous 337463ec16 Kernel: Ext2 can now read from non-block-size aligned offsets 2023-03-21 19:19:17 +02:00
Bananymous 072954480d Kernel: Remove obsolete Ext2FS::ext2_root_inode()
This was not used by anyone and the cast was wrong anyway
2023-03-21 18:19:48 +02:00
Bananymous 3652d11059 Kernel: Remove for_each_block from Ext2 2023-03-21 18:14:02 +02:00
Bananymous 54824aec74 Kernel: Cleanup font parsing
We use now the LittleEndian<> wrapper for PSF2 header and no more
magic constants in code
2023-03-20 19:48:08 +02:00
Bananymous 75e85def83 Kernel: prefs font does not allocate extra buffer 2023-03-20 19:48:01 +02:00
Bananymous f9ae1f0023 Kernel: Fix PC Screen font parsing
I had misread the format and the parsing code was incorrect. I also
changed fonts to store unicode codepoints as 32 bit integers, so
every character can be represented
2023-03-20 14:52:42 +02:00
Bananymous 896b4c280c Kernel: Font parsing uses Spans now 2023-03-20 13:35:54 +02:00
Bananymous e4bcd98904 Kernel: Add basic mounting to VFS. 2023-03-19 05:51:25 +02:00
Bananymous 3570764448 Kernel: Add comparison operator for inodes 2023-03-19 03:34:23 +02:00
Bananymous b41491e205 Kernel: Add cksum to Shell for file read testing
I also removed the 'using namespace BAN'
2023-03-18 03:50:24 +02:00
Bananymous 8236598f9d Kernel: Optimize Ext2 disk reads
We used to read whole file until we reached the asked offset.
Now we can calculate the appropriate block and read just the asked data.
2023-03-18 03:47:59 +02:00
Bananymous 1a26a318a4 Kernel: Rework filesystem reading
We now read from a filesystem to user provided buffer.

Read sizes are determined by read call.

You should now get file descriptors and do reading through Process::current()
2023-03-17 21:18:41 +02:00
Bananymous 1f2ceeb329 Kernel: VFS caches currently open inodes 2023-03-16 15:31:33 +02:00
Bananymous 1b7625581d Kernel: Add basic concept of Processes
We now create Shell as a process that has its own threads
2023-03-16 12:17:04 +02:00
Bananymous c012822d49 BAN: Rename StringView suffix from _sv to sv 2023-03-16 12:15:16 +02:00
Bananymous 8b8e3cbbf0 Kernel/Userspace: Start initial work on userspace and syscalls 2023-03-13 15:32:46 +02:00
Bananymous af854ec9e1 Kernel: Thread creation now takes void(*)() as entry and void* as data
This simplifies threading for the future and gets rid of (undefined?)
cast of member function pointer to address
2023-03-09 15:33:42 +02:00
Bananymous 8dbece9119 Kernel: kmalloc minimum align is forced to s_kmalloc_min_align 2023-03-09 14:37:25 +02:00
Bananymous 8940ff8002 Kernel: You don't have to check whether VFS is initialized or not
VFS now returns Error when attempting to traverse inodes if it did
not find root partition
2023-03-09 02:31:24 +02:00