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777 Commits

Author SHA1 Message Date
Bananymous b80b59ce24 Kernel: Remove unused externs in kernel.cpp 2023-10-30 19:09:31 +02:00
Bananymous 640d27748f 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 42772611ce 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 6e676ee8c5 Kernel: Remove GeneralAllocator since it was not used 2023-10-30 18:13:17 +02:00
Bananymous 066fb44105 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 3f638f125e Kernel: panic takes arguments as rvalue references 2023-10-30 16:22:02 +02:00
Bananymous 35f8f44510 Kernel: Fix ext2 small link deallocation 
Also fix deallocation bug
 2023-10-30 16:22:02 +02:00
Bananymous 0c590821ed Kernel: only map kernel from g_kernel_start onwards 2023-10-30 16:22:02 +02:00
Bananymous 6ef153b6ca Kernel: Enable Write Protect. This seems to be good for security 2023-10-30 12:23:22 +02:00
Bananymous 130a69bac6 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 0b5fcb3f88 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 18f61c5427 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 76f48f095c 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 240a687d8f Kernel: Fix ext2 inode block allocation with triply indirect blocks 2023-10-28 16:53:00 +03:00
Bananymous 35b46e37bb 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 38c267b4c8 Kernel: Fix ext2 inode deletion 
fsck now reports clean filesystem even after deleting files
 2023-10-26 02:05:05 +03:00
Bananymous 87ff38664a Kernel/LibC: Add syscall and wrapper for unlink 2023-10-25 21:45:04 +03:00
Bananymous b7007016c0 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 6ee4d10651 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 e9b7cf332d Kernel: Implement directory creation for RamFS 2023-10-25 19:41:34 +03:00
Bananymous 4ee2f0f789 Kernel: Implement Ext2 directory creation 2023-10-25 19:37:04 +03:00
Bananymous 18e90d305d Kernel: Add Inode API for creating directories 2023-10-25 19:36:04 +03:00
Bananymous fd1b331b86 Kernel: Ext2FS now uses Ext2Inodes as cached values 2023-10-25 19:34:00 +03:00
Bananymous 5c51d09309 Kernel: Fix read offset of RamFileInode 2023-10-25 02:53:20 +03:00
Bananymous 627b8cc140 Kernel/LibC: implement chmod syscall + libc wrapper 2023-10-25 02:35:37 +03:00
Bananymous 2d0da93ac4 Kernel: Add timeout to ACHI commands 
ACHI commands can now fail from timeouts.
 2023-10-24 11:56:25 +03:00
Bananymous f3d9da9549 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 c17cdb39d5 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 69a39b7077 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 19696bdad3 Kernel: TTY doesn't panic if it doesn't find input device 2023-10-16 16:58:39 +03:00
Bananymous 00dd7d85ce 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 0c88c74b76 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 c4a640bcb6 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 0fdf8b6f68 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 37bc52988c Kernel: Don't require framebuffer 
Initializes virtual tty only if framebuffer is initialized
 2023-10-16 01:44:54 +03:00
Bananymous 1312a9dad2 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 73b9c28457 Kernel: PCIDevice stores its vendor id and device id 2023-10-16 01:44:54 +03:00
Bananymous fc5bfa2cb3 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 f7e38ccfe4 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 128202a55a Kernel: Cleanup GDT code 2023-10-13 16:18:22 +03:00
Bananymous 89d74a9088 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 63f64619bc Kernel: add NEVER_INLINE and make Interruptable not constructable 2023-10-13 16:17:27 +03:00
Bananymous 518fd3fad0 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 74b77ba2ac Kernel: Debug temporary debug print just to beginning when full 2023-10-13 12:43:52 +03:00
Bananymous 888e44ce0b Kernel: Allow getting ACPI headers with same signature 2023-10-13 11:24:21 +03:00
Bananymous b3b8376cca Kernel: Fix PhysicalRange mapping size 2023-10-13 03:45:01 +03:00
Bananymous 9c143d18b9 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 9a6cc0dc2d 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 adc5ff9e99 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 bde9ff9319 Kernel: Generalize ATA device and cleanup code 2023-10-12 21:35:25 +03:00