Bananymous
de927b6b05
Kernel: Remove is_in_syscall from Thread
2023-07-30 14:49:51 +03:00
Bananymous
1d7795e22c
Kernel: Hardware exceptions now sends signals to userspace
2023-07-30 14:34:15 +03:00
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