6084aae603
Kernel: Add guard pages to kernel and userspace stacks
2025-07-02 23:12:36 +03:00
17f1ac10e3
Kernel: Don't ignore modules passed with multiboot2
2025-07-02 00:17:42 +03:00
eecdad50a6
Kernel: Fix most of mutex + block race conditions
...
All block functions now take an optional mutex parameter that is
atomically unlocked instead of having the user unlock it before hand.
This prevents a ton of race conditions everywhere in the code!
2025-06-06 03:59:22 +03:00
60d1c26114
Kernel: Fix race condition in FileBackedRegion creation
2025-06-01 13:48:03 +03:00
d54489bbcb
Kernel: Implement MemoryRegion pinning
...
This allows process to pin a MemoryRegion into users memory space for
syscall duration without allowing user to munmap the region.
2025-04-22 04:30:07 +03:00
76bad31dd5
Kernel: Reorder locking with VirtualRange
2025-04-01 23:09:30 +03:00
e6a2f55a59
Kernel: Closing file backed mmap wont expand the file size
2024-12-03 16:12:26 +02:00
64c52012df
Kernel: Fix MemoryRegion overlap comparison
...
This made some calls to `munmap` unmap extra regions.
2024-11-13 17:26:42 +02:00
f0b18da881
Kernel: Add kmalloc helper APIs
2024-10-14 11:39:04 +03:00
2b43569927
Kernel: Use enums in boot info instead of magic values
2024-10-14 11:36:51 +03:00
55fbd09e45
Kernel: Rewrite physical memory allocation with PageTable::fast_pages
2024-10-14 11:32:54 +03:00
54732edff4
Kernel: Fix bugs in memory regions
...
MemoryRegion::initialize() required size to be page aligned, this is not
necessary.
MemoryBackedRegion::copy_data_to_region() required user-write
permissions for underlying data. This did not matter as memory backed
regions dont support COW memory, but it could lead to bugs later on.
2024-09-15 23:18:05 +03:00
c77ad5fb34
Kernel: Implement copy-on-write memory for file backed mmaps
2024-09-11 19:33:50 +03:00
de35cec2e1
Kernel: Allow private file mappings past file end
...
This is just to make memory mapping ELF files easier :D
2024-09-05 14:48:42 +03:00
2f241e1b61
Kernel: Implement FileBackedRegion::clone
2024-09-05 13:59:09 +03:00
1138ec77ca
Kernel: Fix MemoryBackedRegion cloning for non page aligned size
2024-09-04 21:14:26 +03:00
a134d16070
Kernel: Fix MemoryRegion test for contains_fully
2024-08-30 15:33:58 +03:00
fb35f06cf5
Kernel: Add better support for bootloaders loading the kernel
...
Before I assumed that bootloaders loaded the kernel at physical address
0, but this patch kinda allows loading to different addresses. This
still doesn't fully work as kernel bootstrap paging relies on kernel
being loaded at 0
2024-08-22 14:48:21 +03:00
9bc02c81f8
Kernel: Map DMA and PCI MMIO as uncached
2024-07-30 11:10:08 +03:00
96c7e9e29d
Kernel: Cleanup VirtualRange code
...
Virtual range does not need to look into the page table for mapped
physcial pages. It can (and should) just keep track of them itself.
2024-07-21 17:35:07 +03:00
0578d41500
Kernel: Implement WriteCombining memory
...
This makes framebuffer much faster on real hardware
2024-07-15 22:09:09 +03:00
bd1290706a
Kernel: Implement SharedMemoryObject cloning
2024-06-03 03:41:00 +03:00
8bfacb0091
Kernel: Implement deletion of SMO objects
2024-05-31 13:04:23 +03:00
6840a8983c
Kernel: Make sure MSB is not set on SMO keys
2024-05-29 20:01:12 +03:00
d4d530e6c8
Kernel: Implement basic shared memory objects
...
These can allocate memory that can be shared between processes using
a global key. There is currenly no safety checks meaning anyone can
map any shared memory object just by trying to map every possible key.
2024-05-29 15:58:46 +03:00
9c36d7c338
BAN/Kernel: Rework assertion/panic system
...
BAN/Assert.h does not need any includes meaning it can be included
anywhere without problems.
2024-03-04 11:41:54 +02:00
8141b9977d
Kernel: Per processor information is now stored in class Processor
...
This allows us to allocate processor stacks, and other per processor
structures dynamically in runtime. Giving processor stack to
ap_trampoline feels super hacky, but it works for now.
2024-03-03 22:30:06 +02:00
ec0cb5fd54
Kernel: Remove CriticalScopes from memory handing code
2024-02-29 19:16:41 +02:00
d94f6388b7
Kernel: Fix all broken locks from new mutexes
2024-02-28 22:45:34 +02:00
6d59a2b45d
Kernel: Remove VirtualRanges created in kmalloc memory
...
These were only used as stacks of kernel threads, but they can just
as well be allocated as full pages from Heap
2024-02-28 13:19:18 +02:00
09c24088a2
Kernel: Cleanup kmalloc VirtualRange creation
2024-02-28 13:19:18 +02:00
e26f360d93
Kernel: allow kmalloc of size 0
2024-02-07 22:36:24 +02:00
dfe5a2d665
All: Cleanup all files
...
Add newline to end of files and remove whitespace from end of lines
2024-01-24 15:53:38 +02:00
9b841cb823
BuildSystem/Kernel: Enable -Wextra and -Werror in kernel
...
Only needed to fix some unused variable bugs
2023-12-01 01:22:53 +02:00
60e755210c
Kernel/LibC: Implement very basic msync
2023-11-22 22:44:06 +02:00
84040e64b8
Kernel: Don't use multiboot2 explicitly. Parse it to common structure
...
This allows support of multiple different bootloaders
2023-11-17 18:54:59 +02:00
ca34ece8ef
BAN: Update ASSERT api
...
its now much harder to mix < with <= and > with >=
2023-11-02 00:01:12 +02:00
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
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
6e676ee8c5
Kernel: Remove GeneralAllocator since it was not used
2023-10-30 18:13:17 +02:00
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
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
b3b8376cca
Kernel: Fix PhysicalRange mapping size
2023-10-13 03:45:01 +03:00
d4c9f371a6
Kernel: make DMARegion::create static and fix mapping
2023-10-08 18:18:36 +03:00
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
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
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
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
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
5ee3506474
Kernel: Add physical memory info to /proc/{pid}/meminfo
2023-09-30 22:11:45 +03:00
