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358 Commits

Author SHA1 Message Date
Bananymous b02c486ad0 Kernel: add NullDevice to /dev/null 2023-07-20 00:06:22 +03:00
Bananymous 08cd285ca6 Kernel: move Device.h to its own directory 2023-07-19 23:55:38 +03:00
Bananymous fd9210ba9e Kernel: FixedWidthAllocator creation can now fail 2023-07-19 18:07:24 +03:00
Bananymous 5d2bfc858e Kernel: SYS_FORK can now fail instead of panicing on error 2023-07-19 17:47:12 +03:00
Bananymous 9ea2c1d932 Kernel: Support execute disable bit 
We will now map executable memory explicitly as executable.
 2023-07-13 14:28:53 +03:00
Bananymous 297e65f19a Kernel: CPUID can detect wether cpu supports nxe bit 2023-07-13 14:24:58 +03:00
Bananymous 65559a3e44 Kernel: Fix multiple bugs with terminal 2023-07-13 13:09:52 +03:00
Bananymous 9bcfb34524 Kernel: Rewrite whole device structure 
We now have DevFileSystem which is derived from RamFileSystem. All
devices are RamInodes. We don't have separate DeviceManager anymore.
To iterate over devices, you can loop througn every inode in devfs.
 2023-07-10 23:17:14 +03:00
Bananymous ee4ef6638c Kenrel: RamInode now implements truncate() 2023-07-10 16:07:09 +03:00
Bananymous 0910958c04 Kernel: OpenFileDescriptors can now store more than 8 bits of flags 2023-07-10 16:06:36 +03:00
Bananymous d6408bcf17 Kernel: add O_TRUNC 
this is not supported by anything yet
 2023-07-10 15:48:18 +03:00
Bananymous 89d4fa4d9b Kernel: Ext2 fill now return ENOTSUP on write 
We used to crash the kernel
 2023-07-10 15:34:25 +03:00
Bananymous f7c4bc908e Kernel: open() and openat() now take mode as parameter 
O_CREAT now tries to create file if O_CREAT is specified
 2023-07-10 15:08:54 +03:00
Bananymous a0ecbed726 Kernel: You can now read/write to RamInodes 
RamFS should be stored on physical pages and not in kmalloc, but
that will be implemented later :)
 2023-07-10 14:09:35 +03:00
Bananymous 74fc0aa308 Kernel: Inode::create_file() now takes uid and gid as parameters 2023-07-10 13:32:10 +03:00
Bananymous d5f0448e48 Kernel: start work on ram file system 2023-07-10 13:26:14 +03:00
Bananymous d713f252aa Kenrel: Fix inode comparison 
We should not compare rdevs
 2023-07-10 11:48:11 +03:00
Bananymous 5ec2d85081 Kernel: Inode rename directory functions 2023-07-10 11:48:11 +03:00
Bananymous 0d132ee518 Kernel: Mark Ext2 classes final 2023-07-10 11:48:11 +03:00
Bananymous 80c8d52dc5 Kernel: add more functionality to PCI 2023-07-09 23:04:11 +03:00
Bananymous a2f5ad7bed Kernel: Move open file descriptors to their own class 
This simplifies code a lot :)
 2023-07-07 23:11:37 +03:00
Bananymous 07fec6e211 Kernel/LibC: add basic dup2 2023-07-06 23:17:54 +03:00
Bananymous 4cd72992c8 Kernel/LibC: Add basic pipe() syscall and command 
You can now create pipes :)
 2023-07-06 22:16:26 +03:00
Bananymous 1fb305fa45 Kernel/LibC: add clock_gettime() for CLOCK_MONOTONIC 
This gets the number of milliseconds since boot
 2023-07-06 00:38:29 +03:00
Bananymous 4086d7c3be Kernel: rework the whole PageTable structure 
We now have page table structure for kernel memory which is shared
between all processes.
 2023-07-05 23:41:35 +03:00
Bananymous 7d254c26bc Kernel: Rewrite and optimize DiskCache 
DiskCache now consists of PageCaches which are caches of contiguous
sectors. This allows the disk cache to be ordered and faster traversal.

We seem to have a problem somewhere during reading. The stack gets
corrupted.
 2023-06-19 10:31:47 +03:00
Bananymous 9a7b2587af Kernel: kmalloc has now somewhat dynamic storage 
Allocations bigger than PAGE_SIZE and those not forced to be identity
mapped are now done on a GeneralAllocator. This allows us to use kmalloc
for big allocations; bigger than the fixed 1 MiB storage.

This is still a hack and the whole kmalloc will have to be rewritten at
some point, but for now this does the job :D
 2023-06-18 23:27:00 +03:00
Bananymous 09c824b90e Kernel: Add GeneralAllocator::paddr_of 
Yoy can now query physical address of a virtual address for general
allocator allocation
 2023-06-18 23:25:51 +03:00
Bananymous 44fb3945df Kernel: General allocator takes first valid vaddr as parameter 2023-06-17 22:23:34 +03:00
Bananymous 5dcc53bcf2 Kernel: Make disk IO blocking thread safe 
This was causing a lot of deadlocks on vms without kvm accel
 2023-06-12 18:57:47 +03:00
Bananymous 23543b15ca Kernel: Rework syscall calling 
I removed the intermediate function when calling syscalls. Now syscall
handler calls the current process automatically. Only exception is
sys_fork, since it needs a assembly trampoline for the new thread.
 2023-06-12 14:16:48 +03:00
Bananymous 2253c45feb Kernel: Remove Shell from kernel 
This is now obsolete since we have a userspace Shell.
 2023-06-12 02:04:52 +03:00
Bananymous f09b82c4b5 Kernel/LibC: add SYS_{SET,GET}_PWD and chdir, getpwd 2023-06-12 02:02:52 +03:00
Bananymous 11b68f6a53 Kernel: Add SYS_GET_{,E}{UID,GID} 2023-06-11 22:37:00 +03:00
Bananymous 3fe67e4882 Kernel: Add syscalls for set{,e,re}{uid,gid} 2023-06-11 22:37:00 +03:00
Bananymous c7ec19c25c Kernel: Add basic Credentials for the system 
Now filesystem access/open, etc confirm that you have access for rwxs
 2023-06-11 20:06:06 +03:00
Bananymous 64890bb640 Kernel: Add SYS_OPENAT 2023-06-11 03:29:22 +03:00
Bananymous 01311b470f Kernel: Rewrite directory listing so it can be integrated to libc 2023-06-11 00:17:18 +03:00
Bananymous 4cdeb98897 Kernel: We now store the processes exit code 2023-06-10 17:31:56 +03:00
Bananymous 1aec3fcedd Kernel: Scheduler now has reschedule() 
This can be called from anywhere and just causes the scheduler to
schedule the next thread. This is more efficient and verbose version
of Scheduler::set_current_thread_sleeping(0), since we don't have
to wake other threads or do other verifications.
 2023-06-09 00:47:17 +03:00
Bananymous aec63081e2 Kenrel: Rename Scheduler::reschedule -> Scheduler::timer_reschedule 2023-06-09 00:41:43 +03:00
Bananymous 801025ad7b Kernel: Big commit. Rewrite ELF loading code 
We now load ELF files to VirtualRanges instead of using kmalloc.
We have only a fixed 1 MiB kmalloc for big allocations and this
allows loading files even when they don't fit in there.

This caused me to rewrite the whole ELF loading process since the
loaded ELF is not in memory mapped by every process.

Virtual ranges allow you to zero out the memory and to copy into
them from arbitary byte buffers.
 2023-06-09 00:37:43 +03:00
Bananymous 59b10c4d25 Kernel: PageTableScope locks the PageTable before disabling interrupts 
This allows replacing some PageTableScopes with PageTable::lock()
 2023-06-09 00:34:41 +03:00
Bananymous 24993f6020 LibC: implement setenv, unsetenv, putenv 2023-06-05 22:51:02 +03:00
Bananymous 55ea5c5488 Kernel: add basic support for environment variables 
exec functions will search files from PATH
 2023-06-05 22:51:02 +03:00
Bananymous c6b5cc1e07 Kernel: exec now has better posix errors 2023-06-05 21:12:08 +03:00
Bananymous 896b919c9d Kernel/LibC: pass environ pointer to process 2023-06-05 21:12:08 +03:00
Bananymous cf88142856 Kernel: TTY now supports CSI s and u 
These are commonly supported values to save and load cursor
position
 2023-06-05 18:19:13 +03:00
Bananymous d1ad38c8d4 Kernel/LibC: add SYS_STAT and stat(), lstat() 2023-06-05 14:37:14 +03:00
Bananymous 9fbb2b9369 Kernel: Add SYS_WAIT 
This syscall waits for a given pid.
 2023-06-04 18:00:52 +03:00
Bananymous 5bf7ca1c80 Kernel: Allocators are now stored in UniqPtr 
This allows proper memory management, we had some memory leak
 2023-06-04 01:25:57 +03:00
Bananymous 1b1f22c35e Kernel: make load_elf() its own function 2023-06-04 01:24:11 +03:00
Bananymous 479817231a Kernel: PhysicalRange maps its nodes to kernel vaddr space 
This keeps the lower half of address space cleaner
 2023-06-04 01:20:47 +03:00
Bananymous b403155ca9 Kernel: You can specify first vaddr for getting free pages 2023-06-04 01:15:48 +03:00
Bananymous 5f339d585c Kernel: PAGE_FLAG_MASK is now only 0xF 
We don't care currenly about anything but the last few bits
 2023-06-03 20:08:13 +03:00
Bananymous b168462b43 Kernel: PageTable now has debug_dump 
This dumps all the mapped pages and their flags
 2023-06-03 20:08:13 +03:00
Bananymous 9228df0f23 Kernel: Inode/Device detection is done with overridden bool functions 2023-06-03 13:28:15 +03:00
Bananymous 813d0f1b5f Kernel: add basic disk cache 
ATADevices now add disk cache to themselves
 2023-06-03 02:23:14 +03:00
Bananymous 2b901abfb1 Kernel: Shell 'memory' now prints heap memory usage 2023-06-03 02:22:18 +03:00
Bananymous 7bbdee6cc4 Kernel: Symlinks are now working 
We still have to implement loop or depth detection
 2023-06-02 11:43:46 +03:00
Bananymous 835d32814d Kernel: add basic support for symlinks 2023-06-01 00:24:45 +03:00
Bananymous b48b239882 Kernel: Implement Process::exec() 2023-05-31 20:56:29 +03:00
Bananymous 5fb69300ca Kernel: Move userspace entry functions to Process instead of Thread 2023-05-31 19:31:10 +03:00
Bananymous 67886b0c5a Kernel: Move V2P and P2V to Memory/Types.h 2023-05-30 23:57:03 +03:00
Bananymous 81cf389754 Kernel: Booting with higher half kernel gets to Heap initialization 2023-05-30 22:21:12 +03:00
Bananymous 5bb1f2a48c Kernel: Rename MMU to PageTable 
This is more descriptive name for what it actually represents
 2023-05-29 21:06:09 +03:00
Bananymous fb17af4844 Kernel/LibC: opening standard files is done in libc 2023-05-29 20:21:19 +03:00
Bananymous ff83f967d8 Kernel: Make RecursiveSpinLock thread safe 
also SpinLock is now implemented with gcc builtins
 2023-05-29 19:38:09 +03:00
Bananymous 09666adc53 Kernel: fork() now copies allocations through FixedWidthAllocator 2023-05-28 21:34:35 +03:00
Bananymous ec73db0057 Kernel: Move page macros to Types.h 2023-05-28 21:03:08 +03:00
Bananymous 833642d405 Kernel: ISR will now crash userspace process instead of panicing kernel 2023-05-28 20:53:10 +03:00
Bananymous f04399c3a0 Kernel: fork() now copies allocation done through GeneralAllocator 2023-05-28 20:37:39 +03:00
Bananymous f2d767b799 Kernel: Add bareboness fork() function 2023-05-28 18:08:49 +03:00
Bananymous 3e93dae53c Kernel: Add invalidate() to MMU 2023-05-28 18:05:49 +03:00
Bananymous b021d3eebd Kernel: Processes and Threads use VirtualRange memory allocations 2023-05-28 17:48:34 +03:00
Bananymous 15842db83e Kernel: Move PhysicalRange to its own file and add VirtualRange 2023-05-28 17:48:34 +03:00
Bananymous 869de7283f 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 faf14b880e 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 1658e925f2 Kernel: Add bareboness possibility to set termios 2023-05-26 22:31:21 +03:00
Bananymous 80d9f6131b 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 e0a72defa2 Kernel: Add argc and argv to process entry 2023-05-16 00:27:49 +03:00
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 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 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 f36b94d039 Kernel: MMU can now provide info about virtual address space 2023-05-06 17:34:22 +03:00
Bananymous e7a170c89f Kernel: 64 bit MMU now properly identity maps kernel 2023-05-05 14:19:28 +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 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 cd74b2167d LibC: Write mostly functioning stdio 2023-04-23 14:32:37 +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