503dc72686
kernel: Set kernel threads' initial active directories to avoid taking the first directory they use
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This ends up being init's directory, which is fine when init's directory doesn't change...
but a little less fine when the init process calls exec()...
which is what it does in the new configuration I'm testing...
2023-07-10 13:04:00 +02:00
c599251d2a
kernel: Rename UserVM to AddressSpace
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continuous-integration/drone/push Build is passing
This is a more appropriate name now that it does more stuff than allocate virtual memory.
To be fair, the name was a bit awkward anyway. Should have been UserVMAllocator I guess.
2023-07-09 20:38:04 +02:00
5e564e9ae3
kernel: Move Thread::self_directory to UserVM
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Since this is only used by user threads, UserVM is a convenient/related place to store the PageDirectory in a RAII manner.
2023-07-09 20:32:42 +02:00
e9e7b22323
kernel: Separate a thread's page directory into two
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continuous-integration/drone/pr Build is passing
The self directory, and the active directory. The active directory is the one the thread is currently using,
and the self directory is the one the thread owns.
This lets us keep track of both, which fixes ext2 executables crashing the system.
2023-06-25 20:35:40 +02:00
5f4103251a
kernel: Preserve the new page directory while exec() is running
2023-06-25 20:35:40 +02:00
3d157b760c
kernel: Make the stack and loaded program code regions persistent
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continuous-integration/drone/push Build is passing
This way, they can't be modified by mmap() or munmap().
2023-06-19 12:44:49 +02:00
54a1998d42
kernel: Also move children's parent to PID 1 in the common thread exit function
continuous-integration/drone/push Build is passing
2023-06-19 12:35:31 +02:00
e60b2a3d2f
kernel: Move thread exit code into a separate common function
continuous-integration/drone/push Build is passing
2023-06-19 12:33:25 +02:00
ae01a31104
kernel: Make sure the stack is 16-byte aligned on program startup
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This is required by the System V ABI and fixes some movaps-related GPFs in ndisasm.
2023-06-19 10:41:32 +02:00
b7bdec9ece
kernel: Add a bunch more config definitions and hide debug messages behind them
2023-06-18 20:18:00 +02:00
67ed18629d
kernel: Update the VM allocator for userspace to use a linked list
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continuous-integration/drone/push Build is passing
This can cover the entire address space at once in a more memory-efficient way.
Stress-tested using 'base64 /bin/ls' which allocates enough contiguous
virtual memory to store the entirety of /bin/ls :)
A couple of bugs and fixes later, here we are!
2023-06-18 01:48:48 +02:00
7cace9a0d7
kernel: Provide more meaningful panic messages for critical failures
2023-06-17 19:43:25 +02:00
7a78609a85
kernel: Preserve kernel threads' page directories when they differ from the regular kernel page directory
continuous-integration/drone/push Build is passing
2023-06-17 00:49:31 +02:00
d0b65674e6
kernel: Fix 0-delay sleeps blocking the thread forever
2023-06-08 19:57:38 +02:00
b0506bf88f
kernel: Add umask
continuous-integration/drone/push Build is passing
2023-05-26 22:27:49 +02:00
67a9d130e2
kernel: Add initial support for symbolic links :D
2023-05-20 21:49:24 +02:00
01111442d3
kernel: Add the getrusage() system call
2023-05-20 12:48:07 +02:00
8f6bd29da3
kernel: Make file system reference counting work for current directories
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continuous-integration/drone/push Build is passing
Also, make pipes usable again.
2023-05-17 20:37:01 +02:00
1f4c4928cc
kernel+libc+apps: Add mount and umount syscalls, libc wrappers, and utilities
continuous-integration/drone/push Build is passing
2023-05-17 20:30:15 +02:00
29174ca228
kernel/VFS: Add a way to unmount file systems
2023-05-17 19:52:26 +02:00
293a992133
kernel: Add a kernel_wait_for_event() function to avoid weird calls to kernel_wait in kthreads
continuous-integration/drone/push Build is passing
2023-05-04 23:43:00 +02:00
4a7f68b989
kernel: Add a convenience wake_up() function
2023-05-04 23:35:54 +02:00
3a1c22bb93
kernel: Add keyboard combinations for debug information dumps
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Ctrl+Alt+E: Dump threads
Ctrl+Alt+M: Dump memory usage
Ctrl+Alt+H: Dump heap state
2023-05-04 23:32:48 +02:00
96f3d29d37
kernel: Tell the reap thread to run when it's needed, instead of checking every 200 ms
2023-05-04 23:06:00 +02:00
42eb0a1d74
kernel: Freeze waitpid()'s calling thread until a child tells us it's done, instead of polling it every 10 ms
2023-05-04 23:03:31 +02:00
4616997f5b
kernel: Store a thread's parent directly instead of its parent's PID
2023-05-04 22:58:04 +02:00
44e4ca804a
kernel: Make sure argument vectors passed to execve() are not too big
2023-05-04 16:36:24 +02:00
abaf24d0da
kernel/CPU: Move some stuff to StringView
2023-05-03 17:35:46 +02:00
0c1d33f2ec
kernel: Move some files into subdirectories
continuous-integration/drone/push Build is passing
2023-04-28 15:55:06 +02:00
52ce4b28aa
Scheduler: Remove redundant check in for_each_child
continuous-integration/drone/push Build is passing
2023-04-28 15:22:16 +02:00
7b4cfd52cd
Scheduler: Don't search threads spawned before the current thread to find children
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continuous-integration/drone/push Build is passing
Children will always be spawned later (and thus have a higher PID) than their parent.
2023-04-28 15:19:01 +02:00
bcdec62f51
kernel: Allow returning early from Scheduler::for_each_child
2023-04-28 15:13:53 +02:00
77dcfab5ef
kernel: Run the initialization process in a thread
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continuous-integration/drone/push Build is passing
This way we can give it more stack and also reclaim it later!
2023-04-28 13:23:07 +02:00
95659639e5
kernel: Zero out allocated memory for userspace to avoid leaking sensitive data
continuous-integration/drone/push Build is passing
2023-04-17 20:11:07 +02:00
82e7b0e860
kernel: Introduce *at() syscall framework, add openat() and fstatat()
continuous-integration/drone/push Build is passing
2023-04-15 20:26:15 +02:00
df95126ccd
kernel: Remove unneeded debug logs & random cleanups
continuous-integration/drone/push Build is passing
2023-04-14 21:10:38 +02:00
2d30935fdb
kernel: Give each thread a working directory
2023-04-11 22:14:57 +02:00
f6f9254eb4
kernel: Add process and filesystem UIDs and GIDs
2023-04-08 13:12:49 +02:00
3a28771520
kernel+libc+apps: Add support for environment variables
2023-04-07 15:03:38 +02:00
3ef484b3f3
kernel: Add missing include
2023-04-07 14:37:06 +02:00
3a70accdeb
kernel: Move copy_string_vector_to_userspace to ThreadImage
2023-04-07 14:36:24 +02:00
d48d0efb07
kernel: Add names to threads
continuous-integration/drone/push Build is passing
2023-03-24 21:05:38 +01:00
7efcc06090
kernel+init+sh: Implement parent processes and waitpid(-1, ...)
continuous-integration/drone/push Build is passing
2023-03-24 17:37:04 +01:00
b6fb5f3dfe
kernel+libc: Implement waitpid()
continuous-integration/drone/push Build is passing
2023-03-23 22:42:24 +01:00
41c7e3780d
kernel: Add support for exit codes and start preparing for waitpid()
2023-03-23 22:25:56 +01:00
937802964c
kernel: Invert O_NONBLOCK to check whether a thread should block
2023-03-23 21:34:38 +01:00
51f0bdff0e
kernel+libc: Add O_NONBLOCK
continuous-integration/drone/push Build is passing
2023-03-19 11:25:14 +01:00
54f2d35416
kernel: Add the fork() system call
2023-03-18 23:45:48 +01:00
a4ac3c85ed
kernel+libc: Copy argv to userspace
continuous-integration/drone/push Build is passing
2023-03-18 22:25:19 +01:00
8c72e9a49a
kernel: Add an exec() system call
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continuous-integration/drone/push Build is passing
Doesn't support arguments or environment for now.
2023-03-16 22:44:58 +01:00
