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1093 Commits

Author SHA1 Message Date
Bananymous f4b901a646 Kernel: Add Timer::ns_since_boot() 2023-10-12 21:16:39 +03:00
Bananymous 790064d248 Kernel: Add vaddr/paddr conversion functions to DMARegion 2023-10-12 15:20:05 +03:00
Bananymous ab8b77406d Kernel: PCI can now get interrupts for devices 2023-10-11 22:18:58 +03:00
Bananymous 1b9e14a53b Kernel: PCI cleanup PCI::Device API 2023-10-11 21:52:08 +03:00
Bananymous d2cfc843e4 BAN: Optional can now be constructed from another Optional 
Also fix bug in release_value() where we did not call the
destructor.
 2023-10-11 20:10:06 +03:00
Bananymous 521513bed2 Kernel: make DMARegion::create static and fix mapping 2023-10-08 18:18:36 +03:00
Bananymous 400db176d1 Kernel: fix some math in physical ranges 
I allocated 1 bitmap page per 8 data pages. Bitmap page can actually
store 8*PAGE_SIZE data pages.

Also properly set last bits in bitmap. I did not care about endianness
but now we set the bits on unsigned long longs instead of bytes.
 2023-10-08 13:25:34 +03:00
Bananymous 211cad03ff Kernel: Implement bare boness DMA Region 
This does nothing but allocate contiguous physical and virtual memory
and map it as CacheDisable. Also memory is automatically freed RAII style.
 2023-10-08 02:57:22 +03:00
Bananymous 8a9816d6e0 Kernel: Add API for getting contiguous physcial pages 
This will be used to create DMA regions.
 2023-10-08 02:57:22 +03:00
Bananymous 03d2bf4002 Kernel: Rework physical memory allocation 
PhysicalRange is now much simpler bitmap. This makes expanding
PhysicalRange API much easier.
 2023-10-08 02:50:23 +03:00
Bananymous f071240b33 Kernel: Fix PCI BarRegion offsets 
Calculations accidentally assumed bar registers are 8 byte instead
of 4.
 2023-10-08 02:50:23 +03:00
Bananymous 27364f64a6 Kernel: Rework whole ATA driver structure 
Make ATA driver more compatible when we are adding SATA support
 2023-10-08 02:50:23 +03:00
Bananymous bcf62c5f2e Kernel: Rework interrupt mechanism 
All interruptrable classes now inherit from Interruptable which
has methdo handle_irq which is called on a interrupt.
 2023-10-05 18:53:45 +03:00
Bananymous 4d6322ff9c BuildSystem: Don't strip kernel 2023-10-05 18:52:44 +03:00
Bananymous 2eef581737 BuildSystem: Try to set compiler only if it exists 2023-10-05 18:52:05 +03:00
Bananymous 7ce8e2d57b cat: Use write() instead of puts to print file contents 
This allows printing files that contain null bytes behave more like
you would expect
 2023-10-04 22:16:19 +03:00
Bananymous e780eaa45f meminfo: Print allocated physical memory percentage 2023-10-03 10:39:27 +03:00
Bananymous 44cb0af64f Shell: source $HOME/.shellrc if found on Shell startup 2023-10-03 10:39:27 +03:00
Bananymous bb0989fdef Shell: Implement sourcing scripts 2023-10-03 10:24:10 +03:00
Bananymous f0b6844feb meminfo: Add process command line to the output 2023-09-30 23:17:31 +03:00
Bananymous b712c70c75 Kernel: Expose command line and environment to /proc 2023-09-30 23:01:33 +03:00
Bananymous 797ca65c66 Kernel: Add physical memory info to /proc/{pid}/meminfo 2023-09-30 22:11:45 +03:00
Bananymous 762b7a4276 Userspace: Add meminfo command that parses /proc/{pid}/meminfo 2023-09-30 21:20:53 +03:00
Bananymous a511441f7e Kernel: /proc/{pid}/meminfo now reports per process memory usage 2023-09-30 21:20:18 +03:00
Bananymous cd61d710df Kernel: Add procfs that contains only pids 2023-09-30 21:19:36 +03:00
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