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473 Commits

Author SHA1 Message Date
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
Bananymous 8c1f5bfe1e Kernel: Remove obsolete userspace stuff from kernel 2023-04-22 15:38:45 +03:00
Bananymous ec8b9640e2 Kernel: Usespace programs are now ran through ELF files 
only 64 bit elf files are supported for now.
 2023-04-22 15:35:32 +03:00
Bananymous d9068eebb5 Kernel: kmalloc does not dump stack trace 
dump_stack_trace() page faults and i dont feel like debugging this
now :)
 2023-04-21 13:45:13 +03:00
Bananymous 3ad0d2328d Kernel: Don't call 'cli' on interrupt 
This is automatically done because we are using interrupt gates
in the IDT
 2023-04-21 11:18:08 +03:00
Bananymous 3f2beb4547 Kernel: Fix syscall return value in 32 bit 2023-04-21 11:08:02 +03:00
Bananymous be14a6c239 Kernel: Stack pointer is validated when updated 
This allows us not to fail stack pointer when in syscall since
interrupts use their own stack
 2023-04-21 10:40:24 +03:00
Bananymous 3aa0eeb4a3 Kernel: Add barebones per process virtual addresses 
We now assign every (userspace) process its own MMU which we load
in scheduler. This allows every process to have separate virtual
address space.

This is very hackish implementations but it works for now
 2023-04-20 00:45:41 +03:00
Bananymous b3eeb6412f Kernel: Add some bareboness functionality to map virtual addresses 2023-04-19 23:51:36 +03:00
Bananymous d38470c8e2 Kernel: Rename MMU::{un,}allocate... to MMU::{un,}map 
This is more appropriate name for the behaviour :D
 2023-04-19 21:50:30 +03:00
Bananymous a159c980ee Kernel: kmalloc will always print debug on failed alloc 2023-04-19 18:05:01 +03:00
Bananymous 4475e3e184 Kernel: ATAController will fail to initialize in native mode 2023-04-19 17:29:36 +03:00
Bananymous cf0320e47d Kernel: PCI devices now report their prog_if 2023-04-19 16:43:05 +03:00
Bananymous cd03a95128 Kernel: Shell fix file reading 
We were reading 8 bytes at a time instead of the 1024 we were
supposed to :DD
 2023-04-19 14:09:23 +03:00
Bananymous 51e299c7e3 Kernel: Shell now has exit() command 2023-04-19 12:53:09 +03:00
Bananymous 6f65453fd4 Kernel: Fix Process::exit() and where it is called from 
cksum doesn't seem to work anymore on big files. I have to look
into this. It locks up after couple of seconds...
 2023-04-19 12:52:21 +03:00
Bananymous d74ce4950c Kernel: We now launch Shell again on boot 
Adding this just before push :D
 2023-04-19 00:41:24 +03:00
Bananymous 59a682c720 Kernel: init2 is now launched as a process instead of thread 
Also only process can now add threads to scheduler. Nobody should
have raw access to scheduler and everything should be through
Process::current() or irqs (reschedules)
 2023-04-19 00:39:06 +03:00
Bananymous 7bd4593748 Kernel: Process is not reference counted any more 
This was not necessary and it made things needlessly complicated
 2023-04-19 00:34:18 +03:00
Bananymous 5494e2c125 Kernel: Heap allows us to take free pages. 
The API is kinda weird and will probably be reworked in near future
but this will work for now :)
 2023-04-18 10:18:15 +03:00
Bananymous aba82564f5 Kernel: Panic wont print stacktrace if it has already paniced 
This prevents stack trace dump to panic and loop
 2023-04-18 10:18:15 +03:00
Bananymous 93abee9c7c Kernel: Map all ACPI tables on initialization 
This makes their usage much easier and less error prone

They won't mapped be processes when we get to there, so this won't be
a problem
 2023-04-18 10:18:15 +03:00
Bananymous 821d065eba Kernel: Handle some Heap edge cases 2023-04-18 10:18:15 +03:00
Bananymous 2614437ba0 Kernel: Reorder boot initialization 
We now create the TTY as soon as possible so we can show console
output without serial port.
 2023-04-18 10:18:15 +03:00
Bananymous 1aac3a0425 Kernel: Heap implementation can now give free pages from all of RAM 2023-04-18 10:18:15 +03:00
Bananymous a4568f9263 Kernel: Remove unused file 2023-04-18 10:18:15 +03:00
Bananymous a180e72b6f Kernel: Start working on heap 2023-04-18 10:18:15 +03:00
Bananymous 2de64b592d Kernel: Kmalloc now has its memory statically allocated 
We don't use the memory map given by bootloader since this automatically
maps the memory to a available space.
 2023-04-18 10:18:15 +03:00
Bananymous 9c0f3dd996 Kernel: Move kmalloc and MMU to Memory directory 2023-04-18 10:18:15 +03:00
Bananymous 079df39ca8 LibELF: Start implementing elf library 2023-04-18 10:18:15 +03:00
Bananymous fe87c08a02 LibC: add needed stubs to build executables with our compiler 2023-04-12 17:53:02 +03:00
Bananymous 8637959289 Kernel: We can create basic userspace processes 
These are still allocated on the kernel memory
 2023-04-12 17:52:36 +03:00
Bananymous 6be53668b9 Kernel: Scheduler can now terminate processes threads 2023-04-12 17:49:04 +03:00
Bananymous d1b7249803 Kernel: Debug::dump_stack_trace now 'detects' repeating function 2023-04-12 01:32:41 +03:00
Bananymous ff7c50c627 Kernel: kmalloc does not check for corruptiong unless it cannot allocate 
We 'don't care' if kmalloc is corrupted unless it prevents us from
allocating memory. Scheduler should be catching stack overflows either
way and is much more efficient
 2023-04-12 00:24:02 +03:00
Bananymous 12779cdef8 Kernel: Threads now use only 4 KiB stack :) 2023-04-12 00:22:08 +03:00
Bananymous f5e676b2b7 Kernel: Fix TTY spinlock usage 2023-04-12 00:20:04 +03:00
Bananymous 8e5e5f819f Kernel: Shell TTY_PRINT is now function instead of macro 
This makes functions uses way less stack
 2023-04-12 00:18:58 +03:00
Bananymous 370a958379 BuildSystem: GCC will now complain on functions with 1 KiB stack 2023-04-12 00:18:06 +03:00
Bananymous a0bd3dc54f Kernel: kmalloc now detects corruption 
Kmalloc checks if its nodes have corrupted. This was happening
because of stack overflow.
 2023-04-11 23:36:46 +03:00
Bananymous 809eb2fe3e Kernel: Mark Scheduler::start() as noreturn as appropriate 2023-04-11 23:33:20 +03:00
Bananymous 7010d8614f Kernel: kernel doesn't allocate large blocks of data on stack 
We used to allocate 1 KiB blocks on multiple places on stack. This
is a problem, since kernel stack shouldn't have to be too big
 2023-04-11 23:31:58 +03:00
Bananymous 69f13f1896 Kernel: Scheduler will panic if it encounters stack overflow 2023-04-11 23:29:21 +03:00
Bananymous bdaf7cddcb Kernel: Process now locks the mutex while modifying open files 
This allows processes to be actually removed from the list instead
of dead locking
 2023-04-11 23:28:16 +03:00
Bananymous 8d6db168d6 Kernel: remove message from BAN::Error 
We don't store the error message anymore in BAN::Error.
Instead we store a error code that can be mapped into a string.
This allows BAN::Error to only take 4 bytes instead of 128.

We should also make some kernel initialization just panic instead
of returning errors since they are required for succesfull boot
anyway.
 2023-04-11 23:25:21 +03:00
Bananymous 2fabe1949c BAN: Move RefPtr to its own file and create New.h 
New.h contains definitions for placement new operators and
BAN::allocator and BAN::dealloctor
 2023-04-10 21:07:25 +03:00
Bananymous c660df14ec BuildSystem: Fix header copying to sysroot 
We used to copy all headers everytime to sysroot which caused
rebuild of the whole os. Now we use the cmake command
'copy_directory_if_different' which seemed to fix this issue :)
 2023-04-10 21:07:25 +03:00
Bananymous e704968f96 Kernel: Threads can now be terminated mid execution 2023-04-10 21:07:25 +03:00
Bananymous 32359df939 Kernel: Add small wait in ATA driver before reading/writing 
This allows bochs to boot again
 2023-04-10 21:07:25 +03:00
Bananymous 641ed23380 Kernel: Fix framepointers on started threads 2023-04-10 21:07:25 +03:00
Bananymous 9f977488fa BuildSystem: cmake can now build out libc 
I can't seem to get libc++ build to work...
 2023-04-10 21:07:25 +03:00
Bananymous 7752b02fb7 BuildSystem: remove now obsolete include directories from kernel build 2023-04-07 02:25:47 +03:00
Bananymous f70cd3ea77 BuildSystem: Cleanup cmake code 
The buildsystem is kind of a mess. I will be writingn build
instructions soon.
 2023-04-06 20:31:10 +03:00
Bananymous 5db5ff069a BuildSystem: you can now build the toolchain with cmake 2023-04-06 00:23:02 +03:00
Bananymous e84f613c4d Kernel: Shell now somewhat functions again 
I will not be fixing the shell implementation until I get to
userspace
 2023-04-05 11:37:41 +03:00
Bananymous 5db4e5b4d5 Kernel: Fix TTY echo and canonical flag behaviour 2023-04-05 11:35:19 +03:00
Bananymous b00dd8d68d Kernel: Fix ansi control sequence cursor movement 2023-04-05 03:07:52 +03:00