Bananymous/banan-os
1
1
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
865 Commits 1 Branch 0 Tags
cc8af25d73f34783e3ebae3f9807a7697eed5568
Commit Graph

576 Commits

Author SHA1 Message Date
Bananymous
4eb95c963d Kernel/LibC: Add basic pipe() syscall and command 
You can now create pipes :)
 2023-07-06 22:16:26 +03:00
Bananymous
af30d537da Kernel: TTY now unblocks semaphore after read 
This allows concurrent reads not fully reading the buffer not block
indefinately.
 2023-07-06 21:32:34 +03:00
Bananymous
f1bd26fb92 Kernel: Add O_CLOEXEC 2023-07-06 20:00:33 +03:00
Bananymous
5c6bbcb62f Kernel: Remove spammy process/thread exit printing 2023-07-06 10:34:46 +03:00
Bananymous
3c068aa0ae Kernel/LibC: add clock_gettime() for CLOCK_MONOTONIC 
This gets the number of milliseconds since boot
 2023-07-06 00:38:29 +03:00
Bananymous
86df258365 Kernel: rework the whole PageTable structure 
We now have page table structure for kernel memory which is shared
between all processes.
 2023-07-05 23:41:35 +03:00
Bananymous
0d620f3e0f Kernel: Rewrite and optimize DiskCache 
DiskCache now consists of PageCaches which are caches of contiguous
sectors. This allows the disk cache to be ordered and faster traversal.

We seem to have a problem somewhere during reading. The stack gets
corrupted.
 2023-06-19 10:31:47 +03:00
Bananymous
5e123031aa Kernel: kmalloc has now somewhat dynamic storage 
Allocations bigger than PAGE_SIZE and those not forced to be identity
mapped are now done on a GeneralAllocator. This allows us to use kmalloc
for big allocations; bigger than the fixed 1 MiB storage.

This is still a hack and the whole kmalloc will have to be rewritten at
some point, but for now this does the job :D
 2023-06-18 23:27:00 +03:00
Bananymous
388f530edd Kernel: Add GeneralAllocator::paddr_of 
Yoy can now query physical address of a virtual address for general
allocator allocation
 2023-06-18 23:25:51 +03:00
Bananymous
d354cccd37 Kernel: Add enum for ISR name to number 2023-06-18 23:24:27 +03:00
Bananymous
714305ef56 Kernel: General allocator takes first valid vaddr as parameter 2023-06-17 22:23:34 +03:00
Bananymous
f83ae1e9c6 Kernel: Move print during boot 2023-06-12 23:45:36 +03:00
Bananymous
32e1473c94 Kernel: Make disk IO blocking thread safe 
This was causing a lot of deadlocks on vms without kvm accel
 2023-06-12 18:57:47 +03:00
Bananymous
bf617036c7 Kernel: Rework syscall calling 
I removed the intermediate function when calling syscalls. Now syscall
handler calls the current process automatically. Only exception is
sys_fork, since it needs a assembly trampoline for the new thread.
 2023-06-12 14:16:48 +03:00
Bananymous
ce55422a24 Kernel: Remove Shell from kernel 
This is now obsolete since we have a userspace Shell.
 2023-06-12 02:04:52 +03:00
Bananymous
0f63cfa43f Kernel/LibC: add SYS_{SET,GET}_PWD and chdir, getpwd 2023-06-12 02:02:52 +03:00
Bananymous
537780ee1e Kernel: allocate thread stacks from 0x300000 onwards 
I had a problem where thread stack was overlapping with elf loading
 2023-06-12 01:02:19 +03:00
Bananymous
4ca99fcb4e Kernel: Fix bug in elf loading 
We were allocating one extra page
 2023-06-12 00:59:19 +03:00
Bananymous
b254ade69b Kernel: Add SYS_GET_{,E}{UID,GID} 2023-06-11 22:37:00 +03:00
Bananymous
ef4ebaa969 Kernel: Add syscalls for set{,e,re}{uid,gid} 2023-06-11 22:37:00 +03:00
Bananymous
51eb44bf40 Kernel/Userspace: Add basic init process 
This process parses /etc/passwd and promps login screen.
When an username is entered, it will launch that users shell
 2023-06-11 22:37:00 +03:00
Bananymous
c62e820bcf Kernel: Add basic Credentials for the system 
Now filesystem access/open, etc confirm that you have access for rwxs
 2023-06-11 20:06:06 +03:00
Bananymous
46c34db6cb Kernel: GeneralAllocator and FixedWidth allocator invalidate TLB caches 
We were getting random exceptions when reallocating same addressess and
this fixes that problem :)
 2023-06-11 15:57:48 +03:00
Bananymous
8be28012ee LibC: Reorder some syscalls 2023-06-11 03:29:22 +03:00
Bananymous
5aed186827 Kernel: Add SYS_OPENAT 2023-06-11 03:29:22 +03:00
Bananymous
91f812e17f Kernel: Exceptions will now enable interrupts before calling exit() 
this allows scheduler verification on reschedule() not panic
 2023-06-11 03:29:22 +03:00
Bananymous
52c4eebd77 Kernel: Implement SYS_FSTAT 2023-06-11 03:29:22 +03:00
Bananymous
825ec221b7 Kernel: we don't panic anymore on unrecognized syscall 2023-06-11 00:18:48 +03:00
Bananymous
e31080bce3 Kernel: allow open() call with O_SEARCH 2023-06-11 00:18:34 +03:00
Bananymous
7a5d5cabad Kernel: Add syscall for reading directory entries 2023-06-11 00:18:08 +03:00
Bananymous
e209ca7c82 Kernel: Rewrite directory listing so it can be integrated to libc 2023-06-11 00:17:18 +03:00
Bananymous
db49cbd6e2 Kernel: We now store the processes exit code 2023-06-10 17:31:56 +03:00
Bananymous
97c7fc42d1 Kernel: SpinLocks now reschedule if they cannot aquire the lock 
This allows us to not actually spin doing nothing while waiting for
another (not executing) to release the lock. This api won't probably
work when we get to SMP
 2023-06-09 00:53:32 +03:00
Bananymous
7da0627f8e Kernel: Process::exit() now uses the new Scheduler::reschedule() 
We use this new function while waiting for all blocking threads to
resume execution
 2023-06-09 00:49:19 +03:00
Bananymous
27cef23823 Kernel: Scheduler now has reschedule() 
This can be called from anywhere and just causes the scheduler to
schedule the next thread. This is more efficient and verbose version
of Scheduler::set_current_thread_sleeping(0), since we don't have
to wake other threads or do other verifications.
 2023-06-09 00:47:17 +03:00
Bananymous
b7fc2dc3d0 Kenrel: Rename Scheduler::reschedule -> Scheduler::timer_reschedule 2023-06-09 00:41:43 +03:00
Bananymous
8af390e0f6 Kernel: Big commit. Rewrite ELF loading code 
We now load ELF files to VirtualRanges instead of using kmalloc.
We have only a fixed 1 MiB kmalloc for big allocations and this
allows loading files even when they don't fit in there.

This caused me to rewrite the whole ELF loading process since the
loaded ELF is not in memory mapped by every process.

Virtual ranges allow you to zero out the memory and to copy into
them from arbitary byte buffers.
 2023-06-09 00:37:43 +03:00
Bananymous
96d6453ea8 Kernel: PageTableScope locks the PageTable before disabling interrupts 
This allows replacing some PageTableScopes with PageTable::lock()
 2023-06-09 00:34:41 +03:00
Bananymous
2b9900e56e Kernel: get_free_contiguous_pages works with non-page aligned addresses 
also fix bug in ordering
 2023-06-06 02:03:23 +03:00
Bananymous
86f58f60cb LibC: implement setenv, unsetenv, putenv 2023-06-05 22:51:02 +03:00
Bananymous
064ce568c2 Kernel: add basic support for environment variables 
exec functions will search files from PATH
 2023-06-05 22:51:02 +03:00
Bananymous
0b1b4d8f7e Kernel: exec now has better posix errors 2023-06-05 21:12:08 +03:00
Bananymous
b0e9ab0519 Kernel/LibC: pass environ pointer to process 2023-06-05 21:12:08 +03:00
Bananymous
668517a723 Kernel: TTY now actually flushes on ^D 2023-06-05 20:21:46 +03:00
Bananymous
649f08ec78 Kernel: verify that loaded elfs are executable 2023-06-05 19:29:32 +03:00
Bananymous
5425394880 Kernel: TTY now supports CSI s and u 
These are commonly supported values to save and load cursor
position
 2023-06-05 18:19:13 +03:00
Bananymous
9d64dbd5c2 Kernel/LibC: add SYS_STAT and stat(), lstat() 2023-06-05 14:37:14 +03:00
Bananymous
b68d5a5833 Kernel: Add SYS_WAIT 
This syscall waits for a given pid.
 2023-06-04 18:00:52 +03:00
Bananymous
94d2090777 Kernel: fork() now clones current thread 
This is how posix specifies thread cloning during fork
 2023-06-04 17:40:37 +03:00
Bananymous
e97585daf9 Kernel: Process FixedWidthAllocators come now in 4 sizes 2023-06-04 01:26:43 +03:00