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1488 Commits

Author SHA1 Message Date
Bananymous d4c9f371a6 Kernel: make DMARegion::create static and fix mapping 2023-10-08 18:18:36 +03:00
Bananymous 2aabf43ace 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 a6ca9fd453 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 799aab02f5 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 0fae2c7309 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 7ba72b1507 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 f21d4e794c 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 27eb5af6f0 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 68a913c838 BuildSystem: Don't strip kernel 2023-10-05 18:52:44 +03:00
Bananymous a084db6817 BuildSystem: Try to set compiler only if it exists 2023-10-05 18:52:05 +03:00
Bananymous bc4d272c4f 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 57605c2b3e meminfo: Print allocated physical memory percentage 2023-10-03 10:39:27 +03:00
Bananymous 1cd99631e1 Shell: source $HOME/.shellrc if found on Shell startup 2023-10-03 10:39:27 +03:00
Bananymous f67ed9a66e Shell: Implement sourcing scripts 2023-10-03 10:24:10 +03:00
Bananymous 6c11dac113 meminfo: Add process command line to the output 2023-09-30 23:17:31 +03:00
Bananymous 39bc6c43dc Kernel: Expose command line and environment to /proc 2023-09-30 23:01:33 +03:00
Bananymous 5ee3506474 Kernel: Add physical memory info to /proc/{pid}/meminfo 2023-09-30 22:11:45 +03:00
Bananymous c5119cda97 Userspace: Add meminfo command that parses /proc/{pid}/meminfo 2023-09-30 21:20:53 +03:00
Bananymous 785de5f9b9 Kernel: /proc/{pid}/meminfo now reports per process memory usage 2023-09-30 21:20:18 +03:00
Bananymous 8f630a97df Kernel: Add procfs that contains only pids 2023-09-30 21:19:36 +03:00
Bananymous 56bb419884 Kernel: All process' memory areas can report their virtual mem usage 2023-09-30 21:15:46 +03:00
Bananymous d7a00e8cc2 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 9f0797047f Kernel/LibC: dirent now contains file type 2023-09-30 20:46:57 +03:00
Bananymous e8a0eeb0b4 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 3e5645d453 Kernel: Add API for RamDirectoryInodes to delete containing inodes 2023-09-30 19:22:30 +03:00
Bananymous 2301654c4e 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 0b93fce923 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 6304388100 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 96b1186c19 Userspace: Implement basic test for MAP_SHARED 2023-09-29 18:59:37 +03:00
Bananymous 43c23db4a6 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 8ff4e1f8c8 Kernel: Don't write to stat_loc on SYS_WAIT if it is null 2023-09-29 18:31:44 +03:00
Bananymous b57811b371 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 23f429e23b LibC: Fix mmap() 
mmap() did not pass fildes to the syscall structure.
 2023-09-29 17:24:21 +03:00
Bananymous 7b1c573ad0 Kernel: Implement MAP_PRIVATE file mappings 
mmap() now supports mapping files with MAP_PRIVATE.
 2023-09-29 17:23:42 +03:00
Bananymous 4ee759aa3b 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 48096b18c2 LibC: mmap returns MAP_FAILED instead of NULL 2023-09-29 10:38:08 +03:00
Bananymous 06af9f3187 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 16eb055737 Kernel: Add some sanity assertions/functions 2023-09-29 02:03:19 +03:00
Bananymous a34f2e6e0d 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 8357dd7b3d 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 5bdf7d313f LibELF: Add types for native executable 2023-09-29 01:56:57 +03:00
Bananymous 5b6569f2c9 Kernel: Fix off by one error when calculating pages in range 2023-09-29 01:56:15 +03:00
Bananymous 58f4ed22c4 Kernel: Don't map interrupt stack as userspace accessable 2023-09-28 21:58:24 +03:00
Bananymous 245f58cc3a 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 15cd59b8ce 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 d9a5e471f5 Kernel: Remove duplicate code in VirtualRange::create_to_vaddr_range 2023-09-28 13:59:49 +03:00
Bananymous d7ecf94347 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 6eda65eea6 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 d45bf363f1 Kernel: Enter ACPI mode with lai 2023-09-28 12:30:27 +03:00
Bananymous 1abf787596 LibC: Add errno for unknown error 2023-09-28 12:06:17 +03:00