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
a1146a5ce2
Panic: show panic message on screen
2022-10-16 18:23:33 +02:00
d2e2883a79
Kernel: Make mkdir() accessible to userspace
2022-10-16 17:22:12 +02:00
18fbccafb7
VFS: add an exists() function
2022-10-16 16:58:18 +02:00
f8154ce230
Kernel: Implement mkdir() from a single path
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This is done using dirname() and basename() :)
2022-10-16 14:45:25 +02:00
8c0a57f0c2
Kernel: Copy strrchr, dirname and basename over from libc
2022-10-16 14:36:25 +02:00
68403dc029
Kernel: Make AddressSpaces reference-counted
2022-10-15 17:40:33 +02:00
aca1367158
Kernel: Switch to strlcpy() as well
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Surprisingly, most uses of strncpy() are in places where strncpy() is actually a better choice.
For example, copying to a fixed-length char array in a structure.
2022-10-15 17:30:34 +02:00
4bad782aad
Kernel: Increment the maximum number of file descriptors a task can have
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Doesn't use up more space in the Task structure, and now we are above the Minimum Acceptable Value as defined by POSIX (20), I think.
2022-10-15 14:20:29 +02:00
62a2bcf2ff
Kernel: Add a clock() system call
2022-10-15 13:17:26 +02:00
3a9dddaa57
Kernel, libc: Remove the rand() system call
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That's why we now have a VFS and a /dev pseudo-filesystem. To provide that kind of things.
Remember, everything is a file!!
The new way to ask the kernel for random numbers is to read from /dev/random.
2022-10-15 13:04:48 +02:00
613f8170b6
Kernel, libc: Implement mprotect() and use proper PROT_* values
2022-10-15 12:57:14 +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
36bb1cab5c
FileDescriptor: add operator=() so that the fcntl(F_DUPFD syscall compiles :)
2022-10-15 11:16:18 +02:00
5c61252061
Kernel: Add a new fcntl() system call
2022-10-15 10:56:06 +02:00
3eb1bff2e9
Task: add an alloc_fd() function
2022-10-15 10:45:12 +02:00
91d76a2ee4
Devices: Add a new RandomDevice :)
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This new device uses the seeded Mersenne PRNG we use in the kernel.
This device is not meant for regular userspace use, but more for userspace to seed their own PRNGs from.
If the DeviceFS is mounted at /dev, this device can be found at /dev/random.
2022-10-14 20:14:49 +02:00
e0aa552fae
Kernel: Add a move() function
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The standard C++ move() function.
2022-10-14 19:04:56 +02:00
1c3377fc98
Prepare for cloning address spaces, not there yet
2022-10-14 18:17:57 +02:00
177282d79c
Use the more appropriate size_t
2022-10-14 17:33:06 +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
26211bd49f
It (almost) works now
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The only thing doing weird stuff is exec(), so that's commented out and throws ENOSYS right now.
But we have two user tasks running in parallel, isolated from each other!
2022-10-14 16:46:00 +02:00
5d41b4b113
Almost there...
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exec() is not working yet. But the rest are!!
2022-10-13 22:13:04 +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
229b06c63b
Add basic address space infrastructure
2022-10-13 19:19:51 +02:00
83e6b8cd21
VMM: Fix naming convention
2022-10-13 18:42:53 +02:00
57482e4e93
VMM: Make it even nicer
2022-10-13 18:15:52 +02:00
b360307f41
VMM: Make it so much gooder
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There are still some fixes to be made, but I think this is already way cleaner than before.
2022-10-13 17:58:13 +02:00
9f2c9fb190
Kernel: Make Utilities be inline
2022-10-13 17:17:28 +02:00
69a9f7f06a
Kernel: Move VMM from a class to a namespace
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Also, rename the ugly Paging::VirtualMemoryManager name to just 'VMM'. Which is now used instead of kernelVMM.
2022-10-12 20:02:25 +02:00
5f8376409d
Kernel, libc: Implement EFAULT
2022-10-12 19:25:35 +02:00
9cddf9485d
ELFLoader: Make check_elf_image return how much memory the executable will use on success
2022-10-12 19:20:14 +02:00
4091799701
Kernel, libc: Add ENOEXEC (Exec format error)
2022-10-12 19:15:44 +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
261fc73146
ELFLoader: Read the ELF file header by header using the VFS
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Instead of just allocating one big redundant blob of memory and reading into it, then having to free it...
2022-10-12 18:23:52 +02:00
bcbf43e55c
Kernel/std: Add strdup()
2022-10-12 18:03:54 +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
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
854f585e1a
Kernel: Add a seek() system call
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Now, time for libc support!!
2022-10-12 15:28:52 +02:00
97b7572933
VFS: Implement a new type of Node, VFS_DEVICE
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This is used to differentiate normal files from devices.
2022-10-12 15:22:34 +02:00
0f5910add7
Kernel/Utilities: Add new round_{up,down}_to_nearest_page functions
2022-10-12 14:51:04 +02:00
66add380cf
Kernel/Utilities: add a new get_top_of_stack convenience function
2022-10-12 13:17:58 +02:00
97eacc027e
Kernel: Use PAGE_SIZE in more places
2022-10-12 13:05:57 +02:00
f5deb1048a
Kernel: Add functions to push and pop the interrupt state
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This can be useful when you want to disable interrupts, but then only enable them back if they were previously enabled.
2022-10-12 12:58:56 +02:00
b3e16068ef
Kernel: Add Utilities::get_rflags(), and thus Interrupts::are_enabled()
2022-10-12 12:56:55 +02:00
