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