Commit Graph

1168 Commits

Author SHA1 Message Date
Bananymous f88ad7efcd Kernel: All process' memory areas can report their virtual mem usage 2023-09-30 21:15:46 +03:00
Bananymous 38320018dc LibC: Implement stpcpy since gcc seems to need it
gcc seems to optimize some calls to strcpy to stpcpy
2023-09-30 20:58:19 +03:00
Bananymous d883d212b1 Kernel/LibC: dirent now contains file type 2023-09-30 20:46:57 +03:00
Bananymous dedb2a2399 Kernel: RamInode verifies that you have not specified mode type
This is kinda weird behaviour, but it ensures the user cannot
create e.g. CharacterDevice with mode having IFLNK.

The Inode overrider is the only one setting the mode.
2023-09-30 20:46:57 +03:00
Bananymous 8604c55de8 Kernel: Add API for RamDirectoryInodes to delete containing inodes 2023-09-30 19:22:30 +03:00
Bananymous e949e8550c Kernel: Rework RamInode API
RamInode is now a general RamInode with no data. RamFileInode is now
a inode for regular files. This is much cleaner and more intuitive
since there is no reason for most non-regular inodes to hold data
Vector.
2023-09-30 19:22:30 +03:00
Bananymous eb5c6cf736 BAN: Remove endianness functions from Math
There is now a Endianness.h for these. The functions were super slow.
2023-09-29 19:38:07 +03:00
Bananymous 94ce2c97be Shell: Quick fix to not freeze for multiple seconds
When sync is writing to disk, it reserves whole disk to itself.
This commit makes Shell to read username only once from getpwuid().
We used to get username every time prompt was printed.
2023-09-29 19:20:48 +03:00
Bananymous 3f164c6b82 Userspace: Implement basic test for MAP_SHARED 2023-09-29 18:59:37 +03:00
Bananymous f953f3d3ff Kernel: Implement MAP_SHARED for regular files
Every inode holds a weak pointer to shared file data. This contains
physical addresses of pages for inode file data. Physical addresses
are allocated and read on demand.

When last shared mapping is unmapped. The inodes shared data is freed
and written to the inode.
2023-09-29 18:59:20 +03:00
Bananymous 9fc75fe445 Kernel: Don't write to stat_loc on SYS_WAIT if it is null 2023-09-29 18:31:44 +03:00
Bananymous 7a5bb6a56b Userspace: Implement cat-mmap
This behaves exactly as cat, but uses mmap to read the file.
2023-09-29 17:24:55 +03:00
Bananymous d54c6b7f6b LibC: Fix mmap()
mmap() did not pass fildes to the syscall structure.
2023-09-29 17:24:21 +03:00
Bananymous db5d6a7f80 Kernel: Implement MAP_PRIVATE file mappings
mmap() now supports mapping files with MAP_PRIVATE.
2023-09-29 17:23:42 +03:00
Bananymous 4a92f44cf6 Kernel: Implement new abstract MemoryRegion
MemoryBackedRegion now inherits from this and is used for private
anonymous mappigs. This will make shared mappings and file backed
mappings much easier to implement.
2023-09-29 16:18:23 +03:00
Bananymous 376b9f7272 LibC: mmap returns MAP_FAILED instead of NULL 2023-09-29 10:38:08 +03:00
Bananymous 7e9e4c47ae LibELF: Optimize LoadableELF::clone() memory usage
We only clone mapped pages that have been marked as writeble.
Read/execute only pages will be exactly as in the file itself and
can be demand paged also :D
2023-09-29 02:05:12 +03:00
Bananymous 603fc200e6 Kernel: Add some sanity assertions/functions 2023-09-29 02:03:19 +03:00
Bananymous c11e84b248 Kernel: Use the new on demand ELF structure
All executable files are now read from disk and paged on demand.
This was a big rewrite of the old ELF library but in the end
everything seems much cleaner, since all the old functionality was
not actually needed for execution.

I have to do some measurements, but I feel like memory usage dropped
quite a bit after this change.
2023-09-29 02:00:10 +03:00
Bananymous be13120554 LibELF: Implement new ELF structure
This structure is used for demand pagable execution. It handles all
memory allocation and file reading.
2023-09-29 01:58:03 +03:00
Bananymous 9943edad5a LibELF: Add types for native executable 2023-09-29 01:56:57 +03:00
Bananymous f4049be975 Kernel: Fix off by one error when calculating pages in range 2023-09-29 01:56:15 +03:00
Bananymous 6cf7e01fe9 Kernel: Don't map interrupt stack as userspace accessable 2023-09-28 21:58:24 +03:00
Bananymous b51d2f5295 Kernel: mmap regions are now demand paged
mmap will not actually take any memory unless you use the given
memory.
2023-09-28 21:07:14 +03:00
Bananymous 49d941ad65 LibC: Fix a bug in malloc
You could not allocate with size equal to one of the pool sizes.
2023-09-28 21:05:27 +03:00
Bananymous a66c3bdae5 Kernel: Remove duplicate code in VirtualRange::create_to_vaddr_range 2023-09-28 13:59:49 +03:00
Bananymous 547eabb403 Kernel: Reboot will now always succeed
If acpi reset fails, we forcefully trigger a triple fault to restart
the system.
2023-09-28 13:53:03 +03:00
Bananymous 79851394b3 Kernel/LibC/Userspace: Add SYS_POWEROFF + cli tool
You can now shutdown/reboot banan-os with the poweroff cli tool.

Reboot doesn't seem to work on qemu.
2023-09-28 12:36:47 +03:00
Bananymous fcdc922343 Kernel: Enter ACPI mode with lai 2023-09-28 12:30:27 +03:00
Bananymous 0b11d76576 LibC: Add errno for unknown error 2023-09-28 12:06:17 +03:00
Bananymous f7097398ca Kernel: Make tty overload correct has_data() function
This allows snake game to work again :)
2023-09-28 11:54:12 +03:00
Bananymous 85b1252b9e Userspace: Use printf length modifiers when printing 2023-09-28 11:49:31 +03:00
Bananymous 1cd12b5f16 LibC: Implement length modifiers to printf 2023-09-28 11:42:57 +03:00
Bananymous c84b66d078 Shell: String leading and trailing whitespace from commands
This fixes a bug of inserting empty argument if command had trailing
whitespace
2023-09-28 10:28:49 +03:00
Bananymous 27adb9486b BAN: Update Endiannes API
Add functions to swap endiannes or convert host to big/little endian

This code should be very compiler friendly and should be optimized to
single bswap instruction on x86.
2023-09-28 01:22:14 +03:00
Bananymous 8d5369fafe Kernel: Add some functionality to disable TTY input/output
Userspace programs can call tty_ctrl() to disable/enable tty from
handling input and displaying output.

This API is probably going to change in the future to ioctl calls
but I'm not sure how ioctl is used and what functionality should it
have. I decided to create whole new function and syscall for now.

Next I will expose framebuffer in /dev/fb0 and then I can start work
on graphical environment! :D
2023-09-27 15:44:05 +03:00
Bananymous feafc57b63 Kernel: Disable DiskCache sync messages 2023-09-27 14:12:21 +03:00
Bananymous f9b347f9d9 BuildSystem: Rework calling qemu
I change always manually the serial/graphical. When running cmake
you can define variable QEMU_ACCEL that will be used as accelerator.

Also ninja has the following targets for running qemu
  1. qemu:            Run graphical qemu environment
  2. qemu-nographic:  Run qemu without graphical screen. You should
                      select 'serial only' from grub menu.
  3. qemu-debug:      Run qemu without accelerator and interrupt
                      debugger.
2023-09-27 13:49:01 +03:00
Bananymous 6e1825d6b4 Kernel: Add missing TRY() to font loading 2023-09-27 00:49:53 +03:00
Bananymous ec2baeb276 Sync: Add some argument parsing to sync(1)
You can specify --block to make the program wait until sync is
complete.
2023-09-27 00:37:23 +03:00
Bananymous 6cb8bda6e1 LibC: add syncsync() to unistd.h
This is my own WELL NAMED (:D) function that takes a paramemeter
to make the sync operation synchronous.
2023-09-27 00:35:36 +03:00
Bananymous 05e57801e7 Kernel: SYS_SYNC now schedules sync to happen soon
You can pass non-zero argument to the syscall to block until the
sync has finished.
2023-09-27 00:34:00 +03:00
Bananymous b924c85669 Kernel: DiskCache now requires sync to be called from kernel thread
This disables the scenario where user interrupts sync operation
possibly leaving the syncing in invalid state.
2023-09-27 00:32:13 +03:00
Bananymous 09c1aa44d8 Kernel: Allow creationg of empty processes and manual registration
You can now create kernel processes without any threads, add the
needed threads and only then register the process and its threads
to the scheduler.
2023-09-27 00:29:45 +03:00
Bananymous 1d470fb5ba Kernel: All syscalls now validate users pointers
We now validate pointers passed by the user, to forbid arbitary
memory read/write. Now the user is only allowed to pass in pointers
in their own mapped memory space (or null).
2023-09-25 22:07:12 +03:00
Bananymous b4e4f7a6cc Kernel: Print more detailed output on ISR 2023-09-25 20:33:07 +03:00
Bananymous 55d30a7cc3 Kernel: Ext2 inodes are now stored in cache
This allows faster inode access and ensures working inodes when
opened in multiple places.
2023-09-25 20:31:40 +03:00
Bananymous b62186441b BAN: Implement basic WeakPtr
This can be constructed from classes that inherit from Weakable
2023-09-25 19:43:10 +03:00
Bananymous 8caba1e774 Kernel: Ext2 filesystem now holds 10 preallocated block buffers
Inodes can query blocks from this buffer. This allows allocation of
blocks to not fail during normal operations. Also less stress on
kmalloc.
2023-09-25 14:32:25 +03:00
Bananymous 7bdb428938 Kernel: Fix ext2 block allocation
Redo ext2 block allocation. This is now much "cleaner" although
I'm not too fond of the macros.
2023-09-25 13:17:44 +03:00