Bananymous/banan-os
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636c308993ea90040745d44d5b93ad10978279d6
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429 Commits

Author SHA1 Message Date
Bananymous
636c308993 Kernel: fork() now copies allocation done through GeneralAllocator 2023-05-28 20:37:39 +03:00
Bananymous
6fdbe6f9c2 Kernel: Add bareboness fork() function 2023-05-28 18:08:49 +03:00
Bananymous
c19f4c019a Kernel: Add invalidate() to MMU 2023-05-28 18:05:49 +03:00
Bananymous
83eb3dc0cb Kernel: fix MMU::map_page_at() 
We used to only reassign if flags changed
 2023-05-28 17:57:05 +03:00
Bananymous
0129619d9a Kernel: Processes and Threads use VirtualRange memory allocations 2023-05-28 17:48:34 +03:00
Bananymous
e0479b291d Kernel: Move PhysicalRange to its own file and add VirtualRange 2023-05-28 17:48:34 +03:00
Bananymous
b847d7dfd5 Kernel: MMU::get() is now MMU::kernel 
MMU is can now be locked with RecursiveSpinLock.

Scheduler now has get_current_tid() that works before the Scheduler
is initialized. This allows RecursiveSpinLock usage early on.
 2023-05-28 16:18:18 +03:00
Bananymous
fed690a7f2 Kernel: Directory listing is working again 2023-05-26 22:31:21 +03:00
Bananymous
54d981120d Kernel: kmalloc debug_dump is marked [[maybe_unused]] 2023-05-26 22:31:21 +03:00
Bananymous
f79250c4d4 LibC: Rewrite all the headers. 
We now have more or less posix issue 2018 conforming libc headers.

This was a really time consuming and boring operation but it had to
be done.

Now we get to actually start implementing libc :)
 2023-05-26 22:31:21 +03:00
Bananymous
0ab3332ad3 Userspace: Start work on shell 2023-05-26 22:31:21 +03:00
Bananymous
9e0abbc2f0 Kernel: Add bareboness possibility to set termios 2023-05-26 22:31:21 +03:00
Bananymous
4a4a3bf184 Kernel/LibC: move file offset back to kernel 
This makes keeping track of offsets easier and more proper
 2023-05-26 22:31:21 +03:00
Bananymous
f33e78882e Kernel: Add argc and argv to process entry 2023-05-16 00:27:49 +03:00
Bananymous
0ff067bdb7 Kernel: Add MMUScope 
This disables interrupts and loads specified mmu for the
scope it lives in
 2023-05-16 00:26:39 +03:00
Bananymous
31ac3260ed Kernel: MMU keeps track of the current 2023-05-16 00:26:39 +03:00
Bananymous
85039020d3 Kernel: argc is passed as zero to userspace 2023-05-11 18:28:32 +03:00
Bananymous
7eb43990ad BuildSystem: userspace has cmake target 2023-05-11 16:19:53 +03:00
Bananymous
53f4b5a9da LibC: add function declarations to sys/stat.h 2023-05-11 15:11:33 +03:00
Bananymous
1cf7ef3de6 Kernel: Remove offset from OpenFileDescriptor 
This is now handled on the libc side. There might be reasons to
have it in kernel side, but for simplicity's sake I'm moving it
to libc for now :)
 2023-05-09 20:31:22 +03:00
Bananymous
812e61ca70 Kernel: Add barebones GeneralAllocator for >4096B 2023-05-08 22:10:49 +03:00
Bananymous
2d0a5a9e15 Kernel: FixedWidthAllocator operates on MMU 
Instead of Process* we use MMU& in FixedWidthAllocator since it is
everything it actually needs :)
 2023-05-08 00:06:56 +03:00
Bananymous
f32d594879 Kernel: We add FixedWidthAllocators on demand 
On SYS_ALLOC we will add a new FixedWidthAllocator if the old ones
are already full or we don't have one with proper size. This allows
arbitary number of allocations as long as you have enough memory
available :)

Next I will be writing a general allocator for allocations larger
than 4096 bytes which should make SYS_ALLOC syscall complete :)
 2023-05-07 23:57:01 +03:00
Bananymous
2fe9af7165 Kernel/LibC: add free function for FixedWidthAllocator 
I have to rework the syscall API and allocators in process. For
now this works well enough :)
 2023-05-07 01:21:50 +03:00
Bananymous
0deda83d05 BuildSystem: linker -O2 doesn't do anything? hopefully 2023-05-06 19:58:08 +03:00
Bananymous
ff5bcd4416 Kernel: Add basic fixed width allocator for userspace 
We have to move process stacks to the general heap and maybe map
kernel to higher half.
 2023-05-06 19:58:08 +03:00
Bananymous
b65cd1d09b Kernel: Invalid physical addresses from heap are specified now by 0 2023-05-06 17:34:22 +03:00
Bananymous
bc35a561d3 Kernel: GDT tss selector is now 16 bit value 2023-05-06 17:34:22 +03:00
Bananymous
06bc807e34 Kernel: MMU can now provide info about virtual address space 2023-05-06 17:34:22 +03:00
Bananymous
6262e41de1 Kernel: ISRs now print pid and tid 2023-05-06 00:10:15 +03:00
Bananymous
0cb53efa01 Kernel: 64 bit MMU now properly identity maps kernel 2023-05-05 14:19:28 +03:00
Bananymous
4e859bedbc Kernel: TTY input process is now single instance 
Process sends key events to the active (currently only) tty
 2023-04-30 16:11:14 +03:00
Bananymous
f139fc2229 Kernel: namespace and function renames 
MMU moved to namespace kernel
Kernel::Memory::Heap moved to just Kernel
MMU::map_{page,range} renamed to identity_map_{page,range}

Add MMU::get_page_flags
 2023-04-28 14:48:38 +03:00
Bananymous
e48acbb03b Kernel: Add set_tss_stack() to 32 bit 2023-04-28 14:44:23 +03:00
Bananymous
d1155c968e Kernel: dprintln file name is now relative 
This makes file names much shorter
 2023-04-28 14:43:19 +03:00
Bananymous
46dcf98fc1 Kernel: Scheduler updates tss stack on thread execution 2023-04-25 14:49:50 +03:00
Bananymous
58ce907327 Kernel: Usespace threads now have an interrupt stack 2023-04-25 14:49:18 +03:00
Bananymous
6ecc8cac0e Kernel: TSS stack can be set after initialization 2023-04-25 14:48:12 +03:00
Bananymous
bd95f17426 Kernel: Stack pointer out of bounds now panics with a message 2023-04-25 13:40:55 +03:00
Bananymous
175f07cd2f Kernel: Fix bug in Process::create_userspace() 
We used to write more than we needed to. This could lead to unwanted
page faults
 2023-04-25 13:21:28 +03:00
Bananymous
77c83e5552 Kernel: Fix possible dead lock in Process::read() 2023-04-23 14:46:18 +03:00
Bananymous
b15deb420f LibC: Write mostly functioning stdio 2023-04-23 14:32:37 +03:00
Bananymous
b38989d594 Kernel: Add ASSERTion to Process::exit() 
This is just so I don't forget that exit can currently only
be called on the executing thread itself
 2023-04-22 19:05:27 +03:00
Bananymous
79e6de325f Kernel: Process can now load 32 bit elf files on i386 
We are page faulting on process exit but I'm investigating
the reason.
 2023-04-22 19:03:30 +03:00
Bananymous
4f8f3ddc29 Kernel: Fix 32 bit MMU 2023-04-22 18:22:39 +03:00
Bananymous
82a1a29260 Kernel: More proper paging in Elf loading 2023-04-22 18:17:44 +03:00
Bananymous
8a5608df91 Kernel: d{print,warn,error}ln(...) now has a spinlock 2023-04-22 17:58:51 +03:00
Bananymous
3f1c0ec91b Kernel: Process now frees up its pages on destruction 2023-04-22 16:54:46 +03:00
Bananymous
1406a75a92 Kernel: Cleanup process creation for userspace 2023-04-22 16:51:50 +03:00
Bananymous
8001493df3 Kernel: Fix some deadlocks in the Process 2023-04-22 16:19:57 +03:00