139bb5c2a5
Kernel: Fix linker script
...
I have no idea why rodata was executable :D
2024-01-30 17:32:50 +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
b0ff2392a1
Kernel: Add some helpful debug prints
...
Log RIP when stack pointer is out of bounds.
Log all syscalls that return ENOTSUP
2024-01-03 02:08:01 +02:00
001e95f973
Kernel: Optimize sse saving/loading
...
Only save and load sse when new thread is trying to execute sse
instruction. There is no need to do that every time we enter kernel.
2024-01-03 02:06:49 +02:00
4307968182
All: Start work again on sse support
2023-12-28 19:14:42 +02:00
284a012509
Kernel: Add framebuffer information to kernel image
2023-12-09 17:33:58 +02:00
1c78671078
Kernel: Rework all signal code
...
Signal handling code was way too complex. Now everything is
simplified and there is no need for ThreadBlockers.
Only complication that this patch includes is that blocking syscalls
have to manually be made interruptable by signal. There might be some
clever solution to combat this is make this happen automatically.
2023-12-06 13:02:17 +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
71ecdd7245
Kernel: Canonicalize vaddr before using it
2023-10-30 19:20:17 +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
0c590821ed
Kernel: only map kernel from g_kernel_start onwards
2023-10-30 16:22:02 +02:00
6ef153b6ca
Kernel: Enable Write Protect. This seems to be good for security
2023-10-30 12:23:22 +02:00
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
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
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
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
128202a55a
Kernel: Cleanup GDT code
2023-10-13 16:18:22 +03:00
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
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
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
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
976114fde1
Kernel: Print more detailed output on ISR
2023-09-25 20:33:07 +03:00
Bananymous
7a7c5e433e
Kernel/LibC: add flag to enable/disable sse support
...
SSE support is very experimental and causes GP. I decided to make
SSE not default until I get to fixing it :)
2023-09-23 02:28:25 +03:00
Bananymous
dd0b8c4140
Kernel: Add pointer validation API to page table
2023-09-22 17:20:35 +03:00
Bananymous
7ec860a3d4
Kernel: Print stack trace on isr
2023-09-11 01:20:55 +03:00
Bananymous
921d95d18f
All: Clear lines with only whitspace in them
2023-09-10 00:31:42 +03:00
Bananymous
f75adab9d8
Kernel: Move structures in boot.S to .data section
2023-08-11 00:26:12 +03:00
Bananymous
0b8396b1a6
Kernel: IDT now sends EOI for every interrupt
...
EOI is sent before calling the interrupt handler. This should be fine
since all interrupts are processed with interrupts disabled
2023-08-09 09:57:02 +03:00
Bananymous
6fcb191ca0
Kernel: Add PageTable::Flags::CacheDisable
...
Also fix multiple places where we were using uint8_t as page table
flags instead of PageTable::flags_t which we promoted to uint16_t
while back.
2023-08-06 23:59:30 +03:00
Bananymous
659adb89a6
Kernel: Start work on abstracting Timers
2023-08-04 10:29:42 +03:00
Bananymous
643e87a076
Kernel: Threads are deleted sooner and cleaner
...
We now delete threads when
1. it is marked as Terminated and is the current thread
2. it tries to start execution in Terminated state
This allows us to never have thread executing in Terminated state
2023-08-04 10:29:42 +03:00
Bananymous
20eafb4cc4
Kernel: align userspace stacks
...
I was getting #GP on sse instructions
2023-08-03 18:09:48 +03:00
Bananymous
3139391e06
Kernel: Change PageTable API
...
Getting free pages not reserves them, so you don't have to hold
the page table lock :)
2023-08-02 22:09:14 +03:00
Bananymous
64ad752e73
Kernel: PageTable now supports reserved pages
...
You can now map pages as reserved, so that they will not be given
from get_free_page() or get_free_contiguous_pages().
2023-08-01 16:35:54 +03:00
Bananymous
a78a7ed156
Kernel: Cleanup returns from any kind on interrupts
2023-08-01 14:23:50 +03:00
Bananymous
b245a55ea0
Kernel: store/load sse/mmx/fpu state on isr/irq/syscall
...
I haven't tested this yet but should be fine. This will be optimized
to only save state from threads that are using it
2023-07-31 22:28:57 +03:00
Bananymous
c4f6c859c1
Kernel: Generally improve signals
2023-07-31 22:28:18 +03:00
Bananymous
1a6100f083
Kernel: Cleanup signal trampoline
2023-07-30 15:58:35 +03:00
Bananymous
de927b6b05
Kernel: Remove is_in_syscall from Thread
2023-07-30 14:49:51 +03:00
Bananymous
1d7795e22c
Kernel: Hardware exceptions now sends signals to userspace
2023-07-30 14:34:15 +03:00
Bananymous
9729e5a05b
Kernel: Change signal kernel API
...
return rsp and rip are now stored per thread
2023-07-23 18:33:10 +03:00
Bananymous
2dce0a0415
Kernel: Userspace signal handlers are now called one at a time
...
I added a syscall for telling the kernel when signal execution has
finished. We should send a random hash or id to the signal trampoline
that we would include in the syscall, so validity of signal exit can
be confirmed.
2023-07-23 13:34:53 +03:00
Bananymous
8063700d7b
Kernel: add default signal actions
2023-07-21 18:02:35 +03:00
Bananymous
c2cf98e32f
Kernel/LibC: Add bareboness signals
...
You can now call raise() to raise a signal. Signal handlers are
not yet supported, but the handling works :)
2023-07-21 15:45:02 +03:00
Bananymous
a1db032ba9
Kernel: kernel memory takes now full pml4e
...
This allows flags to work properly
2023-07-21 13:47:05 +03:00
Bananymous
5babd7b4f2
Kernel: remove PAGE_FLAGS_MASK as that was not correct anymore
...
After I added NXE bit, the flags mask is no longer valid
2023-07-21 12:01:50 +03:00
Bananymous
c0029a2fa2
Kernel: Don't map kernel executable memory as writable
2023-07-21 11:17:39 +03:00
Bananymous
4e35b8b49d
Kernel: Syscalls now get the interrupt stack
2023-07-21 11:04:16 +03:00
Bananymous
bf5d74b8bc
Kernel: fix memory leak in PageTable
...
PageTable used to leak 2 pages on creation and other two on deletion
2023-07-19 23:17:39 +03:00
