136c0b3ae9
Scheduler: add a reset_task function
...
This can be used later to implement execve()
2022-10-12 17:08:45 +02:00
4e3ef9593d
Scheduler: Move ELF image freeing to ELFLoader
2022-10-12 17:08:17 +02:00
a6f0a7056f
Scheduler: Set the user_task field in a Task at creation time
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We were previously looking at its segment registers to see if they were user-like, but this method is bad.
What is the task was executing a system call?
So now, we store that value at creation time.
2022-10-12 17:07:39 +02:00
d3cb642e5f
Scheduler: add FIXME
2022-10-12 14:30:57 +02:00
0ee9bd7290
Scheduler: free a task's ELF image.
...
Now that we have support for larger pages, this works!!
2022-10-12 14:30:46 +02:00
cf160d1260
Scheduler: Use misc/utils.h instead of doing everything manually.
...
That way the code is cleaner + we have one single point of failure.
2022-10-12 13:18:35 +02:00
0131193379
ELFLoader, Scheduler: Transition to use VFS
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We should start to drop the old InitRD API, which only allows for files to be loaded from the initrd, and which forces pathnames to be relative (bin/init)
With VFS, we can load any kind of file from any kind of filesystem, and using paths that make sense (/bin/init)
2022-10-11 19:33:48 +02:00
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
309058888c
Bugfix: remove duplicate error check when loading a userspace ELF program
...
Also, remember to delete the allocated task, since we do not want memory leaks :)
2022-10-08 13:12:19 +00:00
abcf1b6118
Define PAGE_SIZE as 4096 and use it everywhere instead of using 4096 as a magic number
2022-10-08 14:52:28 +02:00
dc389da74e
Implement an ELFImage struct
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This struct allows us to keep track of what memory is used by the loaded executable. For some reason, freeing this memory when the task exits triggers a kernel page fault, so I'm not doing that right now.
2022-10-07 17:54:05 +02:00
594d79143e
Kernel: enable -Wconversion
2022-10-06 17:13:34 +02:00
38470724dc
Scheduler: adjust SSE saving conditions
2022-10-02 19:13:21 +02:00
1ecd24f5d6
Kernel: Add SSE support (enable SSE on boot and save context (user tasks only) on task switch)
2022-10-02 18:53:54 +02:00
03db57bbf9
Sanity checks
2022-10-01 12:32:09 +02:00
66bee86a8b
Scheduler: add a load_user_task function that directly loads a file from the initrd
2022-10-01 12:28:32 +02:00
9012ccc49e
Remove _userspace and move the idle task to assembly
2022-10-01 12:16:30 +02:00
f25014a8ed
refine syscalls
2022-09-29 19:17:43 +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
57bb1164e9
change 4 pages of stack per stack to a #define
2022-09-25 18:13:20 +02:00
d3527b8824
Use new and delete in Scheduler
2022-09-25 18:12:12 +02:00
19dff40ee2
Scheduler: track total CPU time of tasks
2022-09-25 17:49:51 +02:00
aee4e55fdd
add a proper kernel panic
2022-09-25 16:56:00 +02:00
059bf86ddf
Scheduler: use kmalloc and kfree
2022-09-24 23:18:33 +02:00
3891d0c52e
Rename KernelMemoryManager to MemoryManager
...
Kind of a more catchy name, isn't it?
2022-09-24 21:45:13 +02:00
c3e5251687
Some more userland and font failing
2022-09-23 16:41:43 +02:00
11dd165a8e
Scheduler: add proper support for user tasks (still faults though)
2022-09-22 08:14:04 +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
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
1dce3a0cf7
Give 1 tick of CPU time to the idle task
2022-09-20 20:48:49 +02:00
ddbe9b8b8b
Few small adjustments to the scheduler
2022-09-20 20:02:08 +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
245d5e514d
Optimizations in Spinlock.asm
2022-09-19 16:36:34 +02:00
99e681aeb4
Forgot to add volatile
...
Did I check to see if it compiled before making the previous commit? Yes, of course, why are you asking? ...
2022-09-18 20:16:46 +02:00
d4a982306f
Add spinlocks
2022-09-18 20:15:19 +02:00
