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842 Commits

Author SHA1 Message Date
Bananymous a46b2f43d9 Kernel: Make ProcFS use the new TmpFS internally 2023-11-07 02:35:44 +02:00
Bananymous a20f8607de Kernel: Implement TmpFS Inode unlinking and deletion 2023-11-06 21:49:12 +02:00
Bananymous af330f7b8e Kernel: TmpFS directory inodes now iterate over only valid entries 2023-11-06 21:41:51 +02:00
Bananymous e33b3bcdff Kernel: Fix TmpFS directory entry enumeration early return 2023-11-06 21:06:10 +02:00
Bananymous 181d139c7d Kernel: Fix ext2 directory listing for big directories 2023-11-06 21:05:58 +02:00
Bananymous 639fd8804c Kernel: Implement TmpFS directory listing 2023-11-06 21:05:58 +02:00
Bananymous cbb2c37e00 Kernel: Implement TmpFS inode chmod 2023-11-06 20:11:34 +02:00
Bananymous ab4f033385 Kernel: Cleanup TmpFS code and block access doesn't require allocs 
TmpFS blocks are now accessed with a simple wrapper
 2023-11-06 20:07:09 +02:00
Bananymous 1ed08f62d3 Kernel: TmpInode blocks are on demand allocated 2023-11-06 10:44:37 +02:00
Bananymous 8164c15b6c Kernel: Implement read/write/truncate for TmpFileInode 2023-11-05 02:28:43 +02:00
Bananymous f9bf47ab30 Kernel: Start work on proper TmpFS in Heap instead of kmalloc memory 2023-11-04 18:18:45 +02:00
Bananymous e5ffadb109 Kernel: Add better APIs for fast page 2023-11-04 18:13:16 +02:00
Bananymous 6d899aa6ce BuildSystem: using sysroot doesn't need root privileges anymore! 
Sysroot is now created with fakeroot. This allows root access to be
only needed for disk image creation, since it uses loopback devices.
 2023-11-04 17:50:43 +02:00
Bananymous 120f7329b1 BAN: Update ASSERT api 
its now much harder to mix < with <= and > with >=
 2023-11-02 00:01:12 +02:00
Bananymous 4f25c20c97 Kernel: Canonicalize vaddr before using it 2023-10-30 19:20:17 +02:00
Bananymous 5e396851f4 Kernel: Remove unused externs in kernel.cpp 2023-10-30 19:09:31 +02:00
Bananymous a44482639d Kernel: Temporarily force FileBackedRegion mappings writable 
Now that write-protect bit is enabled this is neccessary.
 2023-10-30 19:08:33 +02:00
Bananymous 3bac19e518 Kernel: Add fast page to page table 
Add "fast page" to KERNEL_OFFSET. This is always present in page
tables and only requires changing the page table entry to map. This
requires no interrupts since it should only be for very operations
like memcpy.

I used to map all temporary mappings to vaddr 0, but this is much
better. C++ standard always says that nullptr access is undefined
and this gets rid of it.

Fixed some bugs I found along the way
 2023-10-30 19:02:09 +02:00
Bananymous 4dbe15aa0e Kernel: Remove GeneralAllocator since it was not used 2023-10-30 18:13:17 +02:00
Bananymous 1c5985148c Kernel: Allow offsetof with packed fields 
This is not standard C++ but should be fine with my toolchain.
 2023-10-30 17:51:18 +02:00
Bananymous ce2461d0e8 Kernel: panic takes arguments as rvalue references 2023-10-30 16:22:02 +02:00
Bananymous 4e785a133c Kernel: Fix ext2 small link deallocation 
Also fix deallocation bug
 2023-10-30 16:22:02 +02:00
Bananymous 26c7aee327 Kernel: only map kernel from g_kernel_start onwards 2023-10-30 16:22:02 +02:00
Bananymous 8a10853ba7 Kernel: Enable Write Protect. This seems to be good for security 2023-10-30 12:23:22 +02:00
Bananymous 5d34cebeca Kernel: Fix stack OOB detection 
I now check both interrupt and normal stack to detect OOB. Processes
are killed if they encouner stack over/under flow.
 2023-10-30 12:17:08 +02:00
Bananymous f05b9a6877 Kernel/LibC: Add crt* files to LibC and remove crt0 from kernel 
There was no reason for libc get crt0 from kernel.
 2023-10-30 11:06:13 +02:00
Bananymous f312c3a4d7 Kernel: Fix ACPI DSDT address 
Read x_dsdt address only if fadt's length contains it. Bochs seems
to have version 1 fadt without the x_* fields.
 2023-10-29 21:35:11 +02:00
Bananymous 0757834176 Kernel: Rewrite a lot of ext2 code 
This commit consists of multiple big changes

1. blocks for inodes are now allocated on demand
  - reading from non allocated block will just return zeroes
  - writing to non allocated block allocates it

2. code doesn't really use raw pointers anymore
  - all casts to uint32_t or structures are now replaced with
    spans. either as<T> or as_span<T> which both are bounds
	checked

3. code doesn't depend on random macros for accessing indirect blocks
  - i added some recursive functions which take care of this :)
 2023-10-28 22:13:28 +03:00
Bananymous 8d583c8b67 Kernel: Fix ext2 inode block allocation with triply indirect blocks 2023-10-28 16:53:00 +03:00
Bananymous 99bde9aa49 Kernel: Fix ext2 inode deletion cleanup 
I now cleanup all blocks (including direct) in i_block array
 2023-10-28 16:52:56 +03:00
Bananymous d09310f388 Kernel: Fix ext2 inode deletion 
fsck now reports clean filesystem even after deleting files
 2023-10-26 02:05:05 +03:00
Bananymous 74bfb930f2 Kernel/LibC: Add syscall and wrapper for unlink 2023-10-25 21:45:04 +03:00
Bananymous 091c5b6a66 BAN: Implement Ext2 file unlinking 
Ext2 inodes can now be unlinked from directories and after last
inode closes (destructor gets called) we check if link count is 0
and cleanup the inode from filesystem
 2023-10-25 21:43:36 +03:00
Bananymous 8bb47aee02 Kernel/LibC/Userspace: Implement mkdir and creat 
Touch now uses creat insteadd of open with O_CREAT flag
 2023-10-25 21:07:26 +03:00
Bananymous 1f794e4ac0 Kernel: Implement directory creation for RamFS 2023-10-25 19:41:34 +03:00
Bananymous e85f9ac6a1 Kernel: Implement Ext2 directory creation 2023-10-25 19:37:04 +03:00
Bananymous 6ee5576dcc Kernel: Add Inode API for creating directories 2023-10-25 19:36:04 +03:00
Bananymous b890e2fc14 Kernel: Ext2FS now uses Ext2Inodes as cached values 2023-10-25 19:34:00 +03:00
Bananymous 4f4b8ada8c Kernel: Fix read offset of RamFileInode 2023-10-25 02:53:20 +03:00
Bananymous 15bb1804ef Kernel/LibC: implement chmod syscall + libc wrapper 2023-10-25 02:35:37 +03:00
Bananymous 00ee86920a Kernel: Add timeout to ACHI commands 
ACHI commands can now fail from timeouts.
 2023-10-24 11:56:25 +03:00
Bananymous 5bfeb9f3ca Kernel: Rewrite all read/write functions to use BAN::ByteSpan 
This allows us to not work with raw pointers and use sized containers
for reading and writing.
 2023-10-24 11:56:00 +03:00
Bananymous e2e5c31d54 Kernel: Map multiboot2 memory in PageTable initialization 
It cannot be assumed that multiboot data lies between kernel_end
and 2 GiB mark, so I properly allocate virtual address space for it.
 2023-10-17 01:15:08 +03:00
Bananymous be3efb0b92 Kernel: Start using multiboot2 instead of multiboot 
This allows better compatibility with (U)EFI and gives RSDP location
instead of me having to scan ram to find it.
 2023-10-17 01:06:24 +03:00
Bananymous 792bb2df1c Kernel: TTY doesn't panic if it doesn't find input device 2023-10-16 16:58:39 +03:00
Bananymous e01928d186 Kernel: Fix device identification with all bits as ones 
If device identification sends all ones, don't initialize the device.
 2023-10-16 16:57:07 +03:00
Bananymous 48980b56ab Kernel: ATABuses are but to compatibility mode if possible 
I don't support native mode ata bus (irq sharing) so ata buses are
but to compatibility mode if possible.
 2023-10-16 16:56:12 +03:00
Bananymous b767317a7a Kernel: Fix ATADevice naming 
ATADevice now stores its name instead of using static buffer. Old
static buffer was changing on every name query. I just hadn't noticed
since virtual machine disks were always sda.
 2023-10-16 16:52:15 +03:00
Bananymous 6f8fce94a0 Kernel: Fix PCI bugs 
IO BarRegion used vaddr instead of the correct paddr. Add API for
memory region iobase query.
 2023-10-16 16:50:49 +03:00
Bananymous 31aa157201 Kernel: Don't require framebuffer 
Initializes virtual tty only if framebuffer is initialized
 2023-10-16 01:44:54 +03:00
Bananymous 5977341610 Kernel: PCI checks if ethernet device is E1000 before initialization 
I used to treat all ethernet deivices as E1000 but now it is actually
verified before initialization
 2023-10-16 01:44:54 +03:00
Bananymous 76f17bd569 Kernel: PCIDevice stores its vendor id and device id 2023-10-16 01:44:54 +03:00
Bananymous dafc016293 Kernel: Clear TTY when setting as current 
Actually this should replace from old buffer, but this works
for now.
 2023-10-13 17:20:26 +03:00
Bananymous c7b6fc950a Kernel: Don't crash if header type != 0 in bar region creation 
Also remove spammy debug printing
 2023-10-13 16:32:32 +03:00
Bananymous 45a6783c3d Kernel: Cleanup GDT code 2023-10-13 16:18:22 +03:00
Bananymous 6b180da4e8 Kernel: Separate scheduler execution and stack loading 
Not sure if this is actually needed, but this allows actual
executing function to be in clean environment
 2023-10-13 16:17:27 +03:00
Bananymous cf4f5f64a5 Kernel: add NEVER_INLINE and make Interruptable not constructable 2023-10-13 16:17:27 +03:00
Bananymous 5630f64175 Kernel: Add 16 more irq handlers 
IDT will now panic if trying to assing handler for non supported
irq.
 2023-10-13 16:17:27 +03:00
Bananymous 1d61bccfc3 Kernel: Debug temporary debug print just to beginning when full 2023-10-13 12:43:52 +03:00
Bananymous f842a9255f Kernel: Allow getting ACPI headers with same signature 2023-10-13 11:24:21 +03:00
Bananymous 72f3c378dd Kernel: Fix PhysicalRange mapping size 2023-10-13 03:45:01 +03:00
Bananymous 39be6ab099 Kernel: Add temporary terminal output before controlling terminal 
Starting work on getting this boot on real hardware.
 2023-10-13 03:31:36 +03:00
Bananymous 773dcdd3a2 Kernel: Check whether ELF address space can be loaded 
Before reserving address space in SYS_EXEC verify that ELF address
space is actually loadable. For example when trying to execute the
kernel binary in userspace, binarys address space would overlap with
current kernel address space. Now kernel won't crash anymore and
will just send SIGKILL to the process calling exec*().
 2023-10-12 22:59:36 +03:00
Bananymous a2b5e71654 Kernel: Implement AHCI driver 
SATA drives can now be used with banan-os. This allows much faster
disk access (writing 10 MiB from 30s to 1.5s). This can definitely
be optimized but the main slow down is probably the whole disk
structure in the os.

AHCI drive is now the default when running qemu.
 2023-10-12 21:53:48 +03:00
Bananymous d3e5c8e0aa Kernel: Generalize ATA device and cleanup code 2023-10-12 21:35:25 +03:00
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 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 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 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 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 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 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 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 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 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