51665a04b7
Kernel: Restart if init exits
2022-10-19 20:33:41 +02:00
7e9744419e
sh: Improve it
2022-10-19 20:16:21 +02:00
b035795eb3
Kernel: Move errno.h and (k)assert.h out of the main include directory
...
This is mostly so IDEs don't pick them up instead of the userspace headers :)
2022-10-19 17:41:23 +02:00
f3af3e252b
Kernel: refresh task_misbehave()
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That function was severely outdated.
2022-10-19 17:26:36 +02:00
656667812a
Kernel: reparent child processes to PID 1 when their parent exits
2022-10-19 17:16:01 +02:00
a29f7f8df2
Kernel: waitpid: support -1 as PID (wait for any child)
2022-10-19 17:15:30 +02:00
671f2a2de3
Kernel, libc: Implement waitpid()
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FIXME: exec() is now doing weird page table stuff. But at least it works, no panics :)
2022-10-18 21:30:52 +02:00
59506b8852
Kernel: Show current_task's name in the log
2022-10-18 18:41:17 +02:00
a9d3bdba6f
Kernel: Keep track of a task's PPID
2022-10-18 17:18:37 +02:00
4f41b9ed37
Scheduler: Implement a find_by_pid function
2022-10-17 20:40:38 +02:00
ea8a42b8c0
Kernel: Add a name field to the Task structure
2022-10-17 19:12:47 +02:00
64f5078494
Kernel, libc: Implement fork()
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This time for real.
Also, add a new per-user-task virtual address allocator (UserHeap), so that mmap'ed pages are in user range and can be copied.
2022-10-17 18:43:35 +02:00
966fdc76d7
Move userspace task to userspace memory
2022-10-17 17:30:05 +02:00
250db2c90f
Scheduler: add an append_task() function
2022-10-17 17:14:22 +02:00
c2fa4f380d
Kernel: Use the new Task member functions
2022-10-17 17:07:25 +02:00
891651f2d6
Task: Move functions operating on Task to member functions
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Also, add an alloc_fd_greater_than_or_equal() function, for use in fcntl(F_DUPFD)
2022-10-17 17:00:07 +02:00
9b39d618de
Kernel, libc: Implement spawn()
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This function is a Luna alternative to fork() and exec().
Why? Simply because I can't figure out for the life of me how to implement a working fork().
So meanwhile, we have spawn() as a replacement. exec() still exists, though.
2022-10-16 18:48:35 +02:00
62d631f1b4
Kernel: Rename assert.h to kassert.h so IDEs pickup the kernel header instead of the userspace one
2022-10-15 12:56:48 +02:00
3eb1bff2e9
Task: add an alloc_fd() function
2022-10-15 10:45:12 +02:00
c8a92af4d2
Whoops! bugfix
2022-10-14 18:21:09 +02:00
1c3377fc98
Prepare for cloning address spaces, not there yet
2022-10-14 18:17:57 +02:00
e43777bd31
Apparently, it just works now.
2022-10-14 18:00:33 +02:00
81f56083c5
Almost there!
2022-10-14 17:38:29 +02:00
5abd8814e3
Kernel: Continue moving utilities to a separate subdirectory
2022-10-14 17:33:06 +02:00
e21b608af4
Utilities: Start moving utilities into specific headers in a utils/ subdirectory
2022-10-14 17:31:47 +02:00
9b3c7816a3
Scheduler: pop the interrupt state when returning early from load_user_task()
2022-10-14 16:54:52 +02:00
0c7c249935
exec is still doing some weird stuff, totally corrupting the page tables
2022-10-13 22:20:24 +02:00
24272c57ef
Almost there!
2022-10-13 21:55:51 +02:00
ee712432bd
Some more multiple address space stuff
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This page-faults. This is because the memory where the ELF should be is all zeroes, which the CPU tries to interpret.
2022-10-13 21:14:39 +02:00
1a54342454
Sanity check
2022-10-12 18:38:18 +02:00
3ac9fed23a
ELFLoader: Add check_elf_image() and check_elf_image_from_filesystem()
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These two functions validate an image, without actually loading it. Very useful for exec!
2022-10-12 18:37:00 +02:00
f8b3567042
Kernel: Add an exec() syscall
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Very bare-bones for now. Doesn't support arguments or environment (we don't have that stuff right now), and the executable is not a valid ELF, it terminates the task.
But it's a start!
2022-10-12 17:42:01 +02:00
25a460e3c6
Scheduler: clear user tasks' registers
2022-10-12 17:12:06 +02:00
136c0b3ae9
Scheduler: add a reset_task function
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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
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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
