e9df5fd663
exec: Copy pathname into kernel memory, since the user memory where it resides is going to be freed
2022-10-12 18:04:20 +02:00
bcbf43e55c
Kernel/std: Add strdup()
2022-10-12 18:03:54 +02:00
531afc3d6f
libc: Add support for the new exec() system call
...
execv() is a temporary wrapper that ignores the second parameter, while execve() and execvp() still error out.
2022-10-12 17:45:58 +02:00
f8b3567042
Kernel: Add an exec() syscall
...
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
34c35163e4
libc: use the normal names that everybody uses for stdout and stderr
2022-10-12 17:15:57 +02:00
dfdc3b2d11
libc: close fds 0 and 1 before opening stdout and stderr
2022-10-12 17:14:49 +02:00
25a460e3c6
Scheduler: clear user tasks' registers
2022-10-12 17:12:06 +02:00
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
...
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
edda41a7bb
libc: Implement fseek(), ftell() and rewind()
...
All three use the new syscall seek() (with its lseek() wrapper in unistd.h)!!
2022-10-12 15:56:03 +02:00
4a5db1dca7
libc: Add lseek()
2022-10-12 15:37:29 +02:00
928ade123c
libc: Add support for the new seek() system call
2022-10-12 15:32:09 +02:00
e40304f2f1
libc: Add off_t to sys/types.h
2022-10-12 15:30:41 +02:00
854f585e1a
Kernel: Add a seek() system call
...
Now, time for libc support!!
2022-10-12 15:28:52 +02:00
97b7572933
VFS: Implement a new type of Node, VFS_DEVICE
...
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
baa71b09cc
Kernel: Build with -fstack-protector-strong instead of -fstack-protector-all
...
We lose a LITTLE bit of security, while allowing the compiler to optimize MUCH more.
Very simple functions, like most functions in misc/utils.cpp, were being made very big when some of them can just be "jmp thingy" or "and rax, something" and waste much less space.
This change makes more sense, I think.
2022-10-12 14:50:31 +02:00
4768d5fc12
ELFLoader: Consider the offset when calculating how many pages to map
...
If a section needs to be mapped at 0x50f50 and its size is 0x200, then that address space exceeds one page.
But since 0x200 is less than one page, we only map one page.
If we count the offset, 0xf50 + 0x200 need two pages. So we can map the right amount of memory.
2022-10-12 14:40:06 +02:00
bbd9f1d187
VMM: Add FIXME
2022-10-12 14:35:34 +02:00
15f340dbbe
VMM: Do not map recursively
2022-10-12 14:34:12 +02:00
8daffa876c
Make some shell scripts executable
2022-10-12 14:31:50 +02:00
28469497e9
Change build system to accept arbitrary CFLAGS during the build process
...
For the kernel, at least.
2022-10-12 14:31:41 +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
eaea4603c6
MemoryManager: Fix logging when built with debug logging
...
That is to say, -DMM_DEBUG
2022-10-12 14:29:30 +02:00
4021cb3ac0
KernelHeap: do not crash the entire system
...
Previously, calling free_virtual_page(s) would cause an assertion fail if the address was not in the kernel heap range.
Now, we just return.
2022-10-12 14:28:48 +02:00
ad9c7af0bf
VMM: add FIXME
2022-10-12 14:27:47 +02:00
950f4ef608
VMM: Add support for larger pages
...
getPhysical() now stops at a larger page, unmap() can unmap a larger page, but map() just transforms it into a normal page.
getFlags() larger pages support is still pending.
At least now we don't page fault because we're trying to free a larger page.
2022-10-12 14:27:26 +02:00
525d567af6
VMM: When unmapping a page, invalidate the TLB for that page
2022-10-12 14:24:34 +02:00
c9ebe89899
Kernel/KernelHeap: Add MODULE #define
2022-10-12 14:04:41 +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
66add380cf
Kernel/Utilities: add a new get_top_of_stack convenience function
2022-10-12 13:17:58 +02:00
cf3f61e373
Kernel: More GDT refactoring
2022-10-12 13:12:46 +02:00
c1f9d3323f
Kernel: Refactor TSS loading to make it cleaner >.<
2022-10-12 13:07:28 +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
...
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
e90b90c556
Kernel, libc: Round up to nearest page-aligned size instead of down
2022-10-12 12:15:12 +02:00
a8eb7a6b66
Merge branch descriptive_headers into main
...
Reviewed-on: #11
2022-10-12 10:11:45 +00:00
d89685bb36
libc: Document sys/types.h
2022-10-12 12:07:42 +02:00
1e16a78106
libc: Document functions in sys/mman.h
2022-10-12 12:06:45 +02:00
a3362429d3
libc: Update strerror()
2022-10-12 12:01:18 +02:00
0d3e7d4463
libc: Document errno.h
2022-10-12 12:01:07 +02:00
b42c866db8
Correct description for fopen()
2022-10-12 11:58:07 +02:00
9f5b3b76d2
libc: Document the function in fcntl.h
2022-10-12 11:57:49 +02:00
f44411aa46
libc: Document the functions in luna.h
2022-10-12 11:54:29 +02:00
6aabe19fb4
libc: Document the functions in stdio.h
2022-10-12 11:51:32 +02:00
ffc223c2cf
libc: Document functions in stdlib.h
...
Also, add prototypes for calloc() and realloc(), which were already implemented but not in the header.
2022-10-12 11:30:21 +02:00
c8c4d31cca
Add a FIXME to string.cpp
2022-10-12 11:20:48 +02:00
