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415 Commits

Author SHA1 Message Date
Bananymous e0a7e242f8 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 6acb86c14b Kernel: MMU keeps track of the current 2023-05-16 00:26:39 +03:00
Bananymous ec316391c5 Kernel: argc is passed as zero to userspace 2023-05-11 18:28:32 +03:00
Bananymous 177b205c48 BuildSystem: userspace has cmake target 2023-05-11 16:19:53 +03:00
Bananymous 729ff267d7 LibC: add function declarations to sys/stat.h 2023-05-11 15:11:33 +03:00
Bananymous ff2e2937a5 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 512be884ed Kernel: Add barebones GeneralAllocator for >4096B 2023-05-08 22:10:49 +03:00
Bananymous f1667b398a 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 b0ec0f1a1a 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 12e42f40c5 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 890aa9aa15 BuildSystem: linker -O2 doesn't do anything? hopefully 2023-05-06 19:58:08 +03:00
Bananymous bcfd838131 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 9c07add00f Kernel: Invalid physical addresses from heap are specified now by 0 2023-05-06 17:34:22 +03:00
Bananymous ab8aac7dcf Kernel: GDT tss selector is now 16 bit value 2023-05-06 17:34:22 +03:00
Bananymous f36b94d039 Kernel: MMU can now provide info about virtual address space 2023-05-06 17:34:22 +03:00
Bananymous 92daa831d1 Kernel: ISRs now print pid and tid 2023-05-06 00:10:15 +03:00
Bananymous e7a170c89f Kernel: 64 bit MMU now properly identity maps kernel 2023-05-05 14:19:28 +03:00
Bananymous 3c5d3eb8ad 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 55bb0084aa 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 acf5660090 Kernel: Add set_tss_stack() to 32 bit 2023-04-28 14:44:23 +03:00
Bananymous 9d7530662f Kernel: dprintln file name is now relative 
This makes file names much shorter
 2023-04-28 14:43:19 +03:00
Bananymous a22caa38d2 Kernel: Scheduler updates tss stack on thread execution 2023-04-25 14:49:50 +03:00
Bananymous dc0f8b383f Kernel: Usespace threads now have an interrupt stack 2023-04-25 14:49:18 +03:00
Bananymous f1a0625b61 Kernel: TSS stack can be set after initialization 2023-04-25 14:48:12 +03:00
Bananymous 02b961fd7e Kernel: Stack pointer out of bounds now panics with a message 2023-04-25 13:40:55 +03:00
Bananymous 6e01e04922 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 b7c2ea8d46 Kernel: Fix possible dead lock in Process::read() 2023-04-23 14:46:18 +03:00
Bananymous cd74b2167d LibC: Write mostly functioning stdio 2023-04-23 14:32:37 +03:00
Bananymous 9b2a577fc3 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 2dd09163e6 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 fb6add2b4a Kernel: Fix 32 bit MMU 2023-04-22 18:22:39 +03:00
Bananymous 48445f12ac Kernel: More proper paging in Elf loading 2023-04-22 18:17:44 +03:00
Bananymous 792fad2a03 Kernel: d{print,warn,error}ln(...) now has a spinlock 2023-04-22 17:58:51 +03:00
Bananymous cc04990ce3 Kernel: Process now frees up its pages on destruction 2023-04-22 16:54:46 +03:00
Bananymous 7530482cc2 Kernel: Cleanup process creation for userspace 2023-04-22 16:51:50 +03:00
Bananymous 33d8c518e9 Kernel: Fix some deadlocks in the Process 2023-04-22 16:19:57 +03:00
Bananymous e0ce2394fe Kernel: Remove obsolete userspace stuff from kernel 2023-04-22 15:38:45 +03:00
Bananymous fadce063a7 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 26fe6ad898 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 fc71d2f7c4 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 35e949ef5e Kernel: Fix syscall return value in 32 bit 2023-04-21 11:08:02 +03:00
Bananymous 9c506ef85b 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 b1c7af38d0 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 ea0c9b639f Kernel: Add some bareboness functionality to map virtual addresses 2023-04-19 23:51:36 +03:00
Bananymous 0030f035be 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 c26529ae86 Kernel: kmalloc will always print debug on failed alloc 2023-04-19 18:05:01 +03:00
Bananymous e8a0df54b1 Kernel: ATAController will fail to initialize in native mode 2023-04-19 17:29:36 +03:00
Bananymous 33393335c8 Kernel: PCI devices now report their prog_if 2023-04-19 16:43:05 +03:00
Bananymous c5b02bb9f5 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 a1047918d2 Kernel: Shell now has exit() command 2023-04-19 12:53:09 +03:00