f83a6ace51
Kernel, libc: Add support for providing a status code to exit()
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The exit() libc function already accepted an integer, but didn't pass it on to the kernel since we had no mechanism for it to do that.
Now, the kernel stores a task's exit status to display it later (and in the future, return it to userspace via wait()/waitpid())
2022-10-08 17:56:40 +02:00
594d79143e
Kernel: enable -Wconversion
2022-10-06 17:13:34 +02:00
7a998dda4d
Kernel: Do not stop interrupts by default in the interrupt handler
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I always knew you can choose if interrupts are enabled for a specific ISR in the IDT entry, but at some moment there was a bug and I thought maybe that fixed it. Now reverting that doesn't break anything, so... let's do it :)
2022-10-04 18:45:46 +02:00
1c4383dea4
Add an apps/ folder and build-system to build userspace apps which can now be loaded from the initrd
2022-10-01 12:17:16 +02:00
f25014a8ed
refine syscalls
2022-09-29 19:17:43 +02:00
46f459337c
Interrupts: Remove ensure_handler and use a more reliable way of detecting if we are in a handler
2022-09-29 18:35:51 +02:00
f1a7138568
User mode (with a few syscalls)
...
IT ACTUALLY WORKS NOW.
Why wasn't it working? Oh, because I was not setting already present page tables's permissions to user mode. Just a little bug. THAT I SPENT DAYS TRYING TO FIND
Anyways, it works now. Such a relief...
2022-09-25 20:35:05 +02:00
aee4e55fdd
add a proper kernel panic
2022-09-25 16:56:00 +02:00
c3e5251687
Some more userland and font failing
2022-09-23 16:41:43 +02:00
ec01dc2927
Scheduler: Change fixed Task array for (highly inefficient) memory allocation, add userspace task support (which as memory is mapped kernel-only instantly crashes), and support for exiting a task (marking it as exited and reaping it later)
2022-09-21 21:06:00 +02:00
ee49caa6d3
Interrupts: ensure is_in_handler is true if we know we are in a handler
2022-09-21 21:03:49 +02:00
4401b31440
Remove ds from context, no need for it in x86_64, use ss instead
2022-09-21 21:03:24 +02:00
49ddb47ad4
Reorganize structure
2022-09-21 17:56:53 +02:00
4f360693bd
Make the demo reboot when you press a key
2022-09-20 20:51:59 +02:00
1c12cf016e
Add a Scheduler.
...
Finally.
Just Round Robin with sleeping, but it's still awesome. I think this can finish v0.3, with a few adjustments.
2022-09-20 19:58:04 +02:00
e6c6a1677a
Rename "SavedContext" to "Context"
...
Seemed like a more appropriate name.
2022-09-20 19:56:43 +02:00
5ee8e17b76
Ensure we are in an interrupt in the interrupt handler
2022-09-20 17:16:23 +02:00
d0d2d4381c
Add a is_in_handler function to validate being in an interrupt handler
2022-09-20 17:16:07 +02:00
ee8c2759a6
Got a stack tracer working!!
2022-09-19 21:11:43 +02:00
183c3236d4
Fix terminology in keyboard IRQ
2022-09-18 09:47:58 +02:00
f7e7a6661d
Use kernel logging in interrupts instead of plain old printf()
2022-09-18 09:43:58 +02:00
efb28d3258
Randomness and stack protection!!
2022-09-14 18:54:40 +02:00
0cb59ee17f
please work please
2022-09-11 08:23:32 +02:00
fe672e6a18
Use appropriate logging functions
2022-09-08 17:03:17 +02:00
b4484e951d
LOTS MORE LOGGING. which is great, of course.
2022-09-07 19:41:08 +02:00
97aef95daa
Fix format specifiers
2022-09-06 18:31:27 +02:00
bd0a24097f
Add a KernelMemoryManager namespace to wrap PMM + VMM
2022-09-06 18:08:15 +02:00
78fe37ddb3
Move declaration of IDTR to header
2022-09-06 11:44:37 +02:00
1367e88d88
Finally implement %l and %z format modifiers
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Finally, we can use %zx with a 64-bit number instead of %x%x with 2 32-bit values split from a 64-bit number!
2022-09-05 16:59:45 +02:00
1b727a66ea
Ready. Set. Go!
2022-09-05 16:13:51 +02:00
