Commit Graph

933 Commits

Author SHA1 Message Date
Bananymous 888e44ce0b Kernel: Allow getting ACPI headers with same signature 2023-10-13 11:24:21 +03:00
Bananymous b3b8376cca Kernel: Fix PhysicalRange mapping size 2023-10-13 03:45:01 +03:00
Bananymous 9c143d18b9 Kernel: Add temporary terminal output before controlling terminal
Starting work on getting this boot on real hardware.
2023-10-13 03:31:36 +03:00
Bananymous 9a6cc0dc2d Kernel: Check whether ELF address space can be loaded
Before reserving address space in SYS_EXEC verify that ELF address
space is actually loadable. For example when trying to execute the
kernel binary in userspace, binarys address space would overlap with
current kernel address space. Now kernel won't crash anymore and
will just send SIGKILL to the process calling exec*().
2023-10-12 22:59:36 +03:00
Bananymous adc5ff9e99 Kernel: Implement AHCI driver
SATA drives can now be used with banan-os. This allows much faster
disk access (writing 10 MiB from 30s to 1.5s). This can definitely
be optimized but the main slow down is probably the whole disk
structure in the os.

AHCI drive is now the default when running qemu.
2023-10-12 21:53:48 +03:00
Bananymous bde9ff9319 Kernel: Generalize ATA device and cleanup code 2023-10-12 21:35:25 +03:00
Bananymous 75fdf4c3c6 Kernel: Add Timer::ns_since_boot() 2023-10-12 21:16:39 +03:00
Bananymous b723ed5fd2 Kernel: Add vaddr/paddr conversion functions to DMARegion 2023-10-12 15:20:05 +03:00
Bananymous 89c975350d Kernel: PCI can now get interrupts for devices 2023-10-11 22:18:58 +03:00
Bananymous f27974dd3c Kernel: PCI cleanup PCI::Device API 2023-10-11 21:52:08 +03:00
Bananymous d4c9f371a6 Kernel: make DMARegion::create static and fix mapping 2023-10-08 18:18:36 +03:00
Bananymous 2aabf43ace Kernel: fix some math in physical ranges
I allocated 1 bitmap page per 8 data pages. Bitmap page can actually
store 8*PAGE_SIZE data pages.

Also properly set last bits in bitmap. I did not care about endianness
but now we set the bits on unsigned long longs instead of bytes.
2023-10-08 13:25:34 +03:00
Bananymous a6ca9fd453 Kernel: Implement bare boness DMA Region
This does nothing but allocate contiguous physical and virtual memory
and map it as CacheDisable. Also memory is automatically freed RAII style.
2023-10-08 02:57:22 +03:00
Bananymous 799aab02f5 Kernel: Add API for getting contiguous physcial pages
This will be used to create DMA regions.
2023-10-08 02:57:22 +03:00
Bananymous 0fae2c7309 Kernel: Rework physical memory allocation
PhysicalRange is now much simpler bitmap. This makes expanding
PhysicalRange API much easier.
2023-10-08 02:50:23 +03:00
Bananymous 7ba72b1507 Kernel: Fix PCI BarRegion offsets
Calculations accidentally assumed bar registers are 8 byte instead
of 4.
2023-10-08 02:50:23 +03:00
Bananymous f21d4e794c Kernel: Rework whole ATA driver structure
Make ATA driver more compatible when we are adding SATA support
2023-10-08 02:50:23 +03:00
Bananymous 27eb5af6f0 Kernel: Rework interrupt mechanism
All interruptrable classes now inherit from Interruptable which
has methdo handle_irq which is called on a interrupt.
2023-10-05 18:53:45 +03:00
Bananymous 68a913c838 BuildSystem: Don't strip kernel 2023-10-05 18:52:44 +03:00
Bananymous 39bc6c43dc Kernel: Expose command line and environment to /proc 2023-09-30 23:01:33 +03:00
Bananymous 5ee3506474 Kernel: Add physical memory info to /proc/{pid}/meminfo 2023-09-30 22:11:45 +03:00
Bananymous 785de5f9b9 Kernel: /proc/{pid}/meminfo now reports per process memory usage 2023-09-30 21:20:18 +03:00
Bananymous 8f630a97df Kernel: Add procfs that contains only pids 2023-09-30 21:19:36 +03:00
Bananymous 56bb419884 Kernel: All process' memory areas can report their virtual mem usage 2023-09-30 21:15:46 +03:00
Bananymous 9f0797047f Kernel/LibC: dirent now contains file type 2023-09-30 20:46:57 +03:00
Bananymous e8a0eeb0b4 Kernel: RamInode verifies that you have not specified mode type
This is kinda weird behaviour, but it ensures the user cannot
create e.g. CharacterDevice with mode having IFLNK.

The Inode overrider is the only one setting the mode.
2023-09-30 20:46:57 +03:00
Bananymous 3e5645d453 Kernel: Add API for RamDirectoryInodes to delete containing inodes 2023-09-30 19:22:30 +03:00
Bananymous 2301654c4e Kernel: Rework RamInode API
RamInode is now a general RamInode with no data. RamFileInode is now
a inode for regular files. This is much cleaner and more intuitive
since there is no reason for most non-regular inodes to hold data
Vector.
2023-09-30 19:22:30 +03:00
Bananymous 43c23db4a6 Kernel: Implement MAP_SHARED for regular files
Every inode holds a weak pointer to shared file data. This contains
physical addresses of pages for inode file data. Physical addresses
are allocated and read on demand.

When last shared mapping is unmapped. The inodes shared data is freed
and written to the inode.
2023-09-29 18:59:20 +03:00
Bananymous 8ff4e1f8c8 Kernel: Don't write to stat_loc on SYS_WAIT if it is null 2023-09-29 18:31:44 +03:00
Bananymous 7b1c573ad0 Kernel: Implement MAP_PRIVATE file mappings
mmap() now supports mapping files with MAP_PRIVATE.
2023-09-29 17:23:42 +03:00
Bananymous 4ee759aa3b Kernel: Implement new abstract MemoryRegion
MemoryBackedRegion now inherits from this and is used for private
anonymous mappigs. This will make shared mappings and file backed
mappings much easier to implement.
2023-09-29 16:18:23 +03:00
Bananymous 16eb055737 Kernel: Add some sanity assertions/functions 2023-09-29 02:03:19 +03:00
Bananymous a34f2e6e0d Kernel: Use the new on demand ELF structure
All executable files are now read from disk and paged on demand.
This was a big rewrite of the old ELF library but in the end
everything seems much cleaner, since all the old functionality was
not actually needed for execution.

I have to do some measurements, but I feel like memory usage dropped
quite a bit after this change.
2023-09-29 02:00:10 +03:00
Bananymous 5b6569f2c9 Kernel: Fix off by one error when calculating pages in range 2023-09-29 01:56:15 +03:00
Bananymous 58f4ed22c4 Kernel: Don't map interrupt stack as userspace accessable 2023-09-28 21:58:24 +03:00
Bananymous 245f58cc3a Kernel: mmap regions are now demand paged
mmap will not actually take any memory unless you use the given
memory.
2023-09-28 21:07:14 +03:00
Bananymous d9a5e471f5 Kernel: Remove duplicate code in VirtualRange::create_to_vaddr_range 2023-09-28 13:59:49 +03:00
Bananymous d7ecf94347 Kernel: Reboot will now always succeed
If acpi reset fails, we forcefully trigger a triple fault to restart
the system.
2023-09-28 13:53:03 +03:00
Bananymous 6eda65eea6 Kernel/LibC/Userspace: Add SYS_POWEROFF + cli tool
You can now shutdown/reboot banan-os with the poweroff cli tool.

Reboot doesn't seem to work on qemu.
2023-09-28 12:36:47 +03:00
Bananymous d45bf363f1 Kernel: Enter ACPI mode with lai 2023-09-28 12:30:27 +03:00
Bananymous 3b283cb860 Kernel: Make tty overload correct has_data() function
This allows snake game to work again :)
2023-09-28 11:54:12 +03:00
Bananymous cb76f1ea75 Kernel: Add some functionality to disable TTY input/output
Userspace programs can call tty_ctrl() to disable/enable tty from
handling input and displaying output.

This API is probably going to change in the future to ioctl calls
but I'm not sure how ioctl is used and what functionality should it
have. I decided to create whole new function and syscall for now.

Next I will expose framebuffer in /dev/fb0 and then I can start work
on graphical environment! :D
2023-09-27 15:44:05 +03:00
Bananymous 459afef89e Kernel: Disable DiskCache sync messages 2023-09-27 14:12:21 +03:00
Bananymous 1c26a402b0 Kernel: Add missing TRY() to font loading 2023-09-27 00:49:53 +03:00
Bananymous 1e6930a3bc Kernel: SYS_SYNC now schedules sync to happen soon
You can pass non-zero argument to the syscall to block until the
sync has finished.
2023-09-27 00:34:00 +03:00
Bananymous 11db49e2d3 Kernel: DiskCache now requires sync to be called from kernel thread
This disables the scenario where user interrupts sync operation
possibly leaving the syncing in invalid state.
2023-09-27 00:32:13 +03:00
Bananymous c33e658f98 Kernel: Allow creationg of empty processes and manual registration
You can now create kernel processes without any threads, add the
needed threads and only then register the process and its threads
to the scheduler.
2023-09-27 00:29:45 +03:00
Bananymous 22252cfcf0 Kernel: All syscalls now validate users pointers
We now validate pointers passed by the user, to forbid arbitary
memory read/write. Now the user is only allowed to pass in pointers
in their own mapped memory space (or null).
2023-09-25 22:07:12 +03:00
Bananymous 976114fde1 Kernel: Print more detailed output on ISR 2023-09-25 20:33:07 +03:00
Bananymous 9d55cf1d80 Kernel: Ext2 inodes are now stored in cache
This allows faster inode access and ensures working inodes when
opened in multiple places.
2023-09-25 20:31:40 +03:00
Bananymous 669b2ace4e Kernel: Ext2 filesystem now holds 10 preallocated block buffers
Inodes can query blocks from this buffer. This allows allocation of
blocks to not fail during normal operations. Also less stress on
kmalloc.
2023-09-25 14:32:25 +03:00
Bananymous 0e67c6318b Kernel: Fix ext2 block allocation
Redo ext2 block allocation. This is now much "cleaner" although
I'm not too fond of the macros.
2023-09-25 13:17:44 +03:00
Bananymous ffa80d0466 Kernel: Hacky kmalloc quick fix
Remove GeneralAllocator from kmalloc as it is not CriticalScope safe.
This requires increasing kmalloc memory.
2023-09-25 13:13:57 +03:00
Bananymous e7ca83ecb2 Kernel: VirtualRange doesn't store physical addresses of pages
This was unnecessarry allocation, since the page table allready
contains virtual address -> physical address mappings.
2023-09-24 01:29:34 +03:00
Bananymous f6261e5dc9 Kernel: all mapped ranges are now stored in one container
We just now have a flag if a mapping is unmappable
2023-09-23 23:45:26 +03:00
Bananymous d1bbbf48f6 Kernel: Fully remove sys_alloc and sys_free
I could delete the whole FixedWidthAllocator as it was now obsolete.
GeneralAllocator is still used by kmalloc. Kmalloc cannot actually
use it since, GeneralAllocator depends on SpinLock and kmalloc runs
without interrupts.
2023-09-23 03:53:30 +03:00
Bananymous 3ba15b41a3 Kernel/LibC: remove PATH resoltion from kernel
I have no idea why I had made PATH environment variable parsing
to be part of the kernel. Now the shell does the parsing and
environment syscall is no longer needed.
2023-09-23 03:08:14 +03:00
Bananymous 7a7c5e433e Kernel/LibC: add flag to enable/disable sse support
SSE support is very experimental and causes GP. I decided to make
SSE not default until I get to fixing it :)
2023-09-23 02:28:25 +03:00
Bananymous 6bb2c80bdd Kernel/LibC: userspace malloc now uses mmap to get memory
We could remove syscalls to allocate more memory. This was not
something the kernel should have done.
2023-09-23 02:26:23 +03:00
Bananymous af4af1cae9 Kernel/LibC: add mmap for private anonymous mappings
This will be used by the userspace to get more memory. Currently
kernel handles all allocations, which is not preferable.
2023-09-22 23:01:14 +03:00
Bananymous 83b165ebb0 Kernel: Add constexpr conditional debug prints 2023-09-22 17:20:35 +03:00
Bananymous c5f9f0c307 Kernel: Add LAI as a dependency
I did not feel like implementing AML interpreter now, and wanted
everything AML has to offer. I will be writing my own AML interperter
at some point.
2023-09-22 17:20:35 +03:00
Bananymous 9d827037ca Kernel: Fix timer includes 2023-09-22 17:20:35 +03:00
Bananymous 58506c5bd1 Kernel: Add config read/write api to PCI 2023-09-22 17:20:35 +03:00
Bananymous dd0b8c4140 Kernel: Add pointer validation API to page table 2023-09-22 17:20:35 +03:00
Bananymous 11717f90c1 Kernel: PCI devices can now create region for BAR
This creates either MEM or IO region for read/write access to PCI
device.
2023-09-22 17:20:35 +03:00
Bananymous a740bf8df4 1000th COMMIT: Kernel: Add basic E1000 driver
This driver is only capable to read mac address and enable and read
link status
2023-09-22 17:20:28 +03:00
Bananymous 63dc2b6aa6 Kernel: Implement SYS_SYNC and add sync executable to userspace
You can (and have to) manually sync disk after writes to it.
2023-09-11 01:26:27 +03:00
Bananymous eee0537053 Kernel: Writes to disk are not synchronous anymore
Implement "proper" DiskCache syncing
2023-09-11 01:25:16 +03:00
Bananymous 7ec860a3d4 Kernel: Print stack trace on isr 2023-09-11 01:20:55 +03:00
Bananymous 9b9a6b2cfc Kernel: Fix ext2 file write 2023-09-11 01:20:39 +03:00
Bananymous 8fb5f97a18 Kernel: Improve open() POSIX compatability
Also rename Process::sys_creat -> create_file since it is not
actually a syscall and only used by open as a healper.
2023-09-10 00:31:42 +03:00
Bananymous 921d95d18f All: Clear lines with only whitspace in them 2023-09-10 00:31:42 +03:00
Bananymous 1fcf122c50 Kernel: Add basic ZeroDevice to /dev/zero 2023-09-10 00:31:42 +03:00
Bananymous dd9af56e21 Kernel: Start work on making inodes more thread safe
All inode operations are now locked and thread blocked
2023-09-10 00:31:42 +03:00
Bananymous 39a5c52088 Kernel: Fix directory permissions
We did not care about X bit in directories and instead used only the
R bit for search/read.
2023-09-08 11:46:53 +03:00
Bananymous 660f7cbfeb Kernel: Ext2 directories can allocate new blocks if needed 2023-09-08 10:29:26 +03:00
Bananymous 1abf54d652 Kernel: Fix bug in disk writing
I have used two weeks in locating a bug in my ext2 implementation
while the bug was actually in disk write. If you called write_sectors
on disk it would write the first sector_size bytes repeatedly to all
asked sectors and this corrupted the disk...
2023-09-08 02:43:08 +03:00
Bananymous 3750d29b2b Kernel: Fix possible out-of-bounds disk access in ext2 2023-09-08 02:42:53 +03:00
Bananymous 4648f6718e Kernel: Cleanup TTY::read() 2023-09-07 15:27:21 +03:00
Bananymous b30af0edca Kernel: TTY now reads input byte by byte
This allows correct behaviour for character streams / keyboard
handling. Serial input can now send working ^C :D
2023-09-07 15:06:27 +03:00
Bananymous 5e1725abb2 Kernel: Remove bitmap debug printing from ext2 inode allocation 2023-09-06 01:25:09 +03:00
Bananymous 6ad2f23259 Kernel: Correct inode links count 2023-09-05 14:46:56 +03:00
Bananymous ba7e1b9ca5 Kernel: Add /dev/tty symlink that targets the current tty 2023-09-05 01:07:52 +03:00
Bananymous f0772e385c Kernel: Implement basic RamSymlinkInode 2023-09-05 01:07:52 +03:00
Bananymous 3fd94b1acb Kernel: You can now read serial output from the /dev/ttyS* 2023-09-05 01:07:52 +03:00
Bananymous 93c5755012 Kernel: Receive interrupts for COM1 and COM2 input
The input has to still be attached to terminal
2023-09-04 22:07:40 +03:00
Bananymous 323de3c866 Kernel: Rework whole Terminal structure
Serial monitors can now be used as a output. This requires editing
init code for the stdio opening. Serial input is not supported, so qemu
still needs graphical window for ps/2 keyboard.
2023-09-04 19:34:18 +03:00
Bananymous 52b9fddfd7 Kernel: Make serial devices to their own class 2023-09-04 14:57:05 +03:00
Bananymous 04cfbca336 Kernel: Add ANSI support for hiding/showing cursor to TTY 2023-09-04 14:30:09 +03:00
Bananymous 9901f95d78 Kernel: Add basic nanosleep, only millisecond percision 2023-09-04 12:59:50 +03:00
Bananymous b2139c0b1e Kernel: Add basic support for O_NONBLOCK (only for tty) 2023-09-04 12:57:52 +03:00
Bananymous 6f002c926a Kernel: add basic fcntl() with couple of commands and no validation 2023-09-04 12:57:09 +03:00
Bananymous a711462ef4 Kernel: Split ext2 implementation to multiple files 2023-09-01 15:10:23 +03:00
Bananymous f31c6b847f Kernel: Start work on writable ext2 filesystem 2023-08-31 23:40:31 +03:00
Bananymous 195ccf4f53 Kernel: Add missing ififo() to Inode::Mode 2023-08-31 21:38:31 +03:00
Bananymous 073edd0b8e Kernel: Stack trace dumping validates pointers before using them 2023-08-31 21:36:23 +03:00
Bananymous 250789aa20 Kernel: better handle kernel errors 2023-08-29 00:13:21 +03:00
Bananymous 8032824054 BuildSystem: use -a with rsync
This allows cmake to not rebuild whole project every time
2023-08-28 11:38:17 +03:00
Bananymous 80e7a89f67 BuildSystem: Base sysroot is now distributed as a tar ball
This allows file and directory permissions work as intended.

cmake is now filled with 'sudo' but with sudo timeout this should be
fine.
2023-08-23 10:38:21 +03:00
Bananymous 38e72019c7 Kernel: kill() with negative pid actually matches pgid 2023-08-22 14:54:15 +03:00
Bananymous d745fca86a Kernel: Process keeps track if forked process has called exec*() 2023-08-22 14:53:46 +03:00
Bananymous 60a2185ee6 Kernel/LibC: implement proper getpgid and setpgid 2023-08-22 14:53:12 +03:00
Bananymous d634fec8dc Kernel: Add function to enumerate processes in session 2023-08-22 14:52:28 +03:00
Bananymous c9243f0d1e Kernel/LibC: Add {get,set}pgrp() 2023-08-22 11:36:33 +03:00
Bananymous 0f6c19a1b7 Kernel: Barebones implementation sessions and process groups 2023-08-22 11:35:40 +03:00
Bananymous 79f3aa5419 Kernel/LibC: add dup() syscall and function 2023-08-17 12:03:29 +03:00
Bananymous 871c792976 Kernel: O_SEARCH doesn't require any permissions
Except read permissions for all directories in the path

This allows us to stat e.g. device files for which we don't have
the permissions.
2023-08-11 12:26:07 +03:00
Bananymous 8480ffe108 Kernel: open() now validates file access mode 2023-08-11 11:53:38 +03:00
Bananymous e1400f9680 Kernel: Remove unused syscall 2023-08-11 11:43:48 +03:00
Bananymous 6e5bce3c57 Kernel: Zero initialize threads sse_storage 2023-08-11 00:26:43 +03:00
Bananymous f75adab9d8 Kernel: Move structures in boot.S to .data section 2023-08-11 00:26:12 +03:00
Bananymous 5d0a6e7b08 Kernel: HPET is now used in legacy mode when PIC is forced 2023-08-10 22:01:30 +03:00
Bananymous b0c8a9cdc4 Kernel: Fix slave PIC
we dont mask interrupt 2 in PIC since it corresponds to the
slave PIC. Also cleanup PIC code :)
2023-08-10 21:52:31 +03:00
Bananymous ebe0adb3b5 Kernel: HPET doesn't use the legacy mapping anymore 2023-08-10 21:08:32 +03:00
Bananymous 4842d5e2b9 Kernel: APIC now uses MMIO namespace functions for mmio 2023-08-10 21:07:23 +03:00
Bananymous 0b8396b1a6 Kernel: IDT now sends EOI for every interrupt
EOI is sent before calling the interrupt handler. This should be fine
since all interrupts are processed with interrupts disabled
2023-08-09 09:57:02 +03:00
Bananymous 55ef793a74 Kernel: Validate HPET tick period 2023-08-09 09:50:38 +03:00
Bananymous 96c0ad0d3d Kernel: Remove get_unix_timestamp from SystemTimer
Kernel now uses the percise real_time() and time_since_boot()
2023-08-09 08:57:50 +03:00
Bananymous 6fcb191ca0 Kernel: Add PageTable::Flags::CacheDisable
Also fix multiple places where we were using uint8_t as page table
flags instead of PageTable::flags_t which we promoted to uint16_t
while back.
2023-08-06 23:59:30 +03:00
Bananymous 3df97c36e6 Kerne: SystemTimer can now output the current real time 2023-08-04 16:06:47 +03:00
Bananymous c732297623 Kernel: Rename TimerHandler to SystemTimer
I changed SystemTimer to only handle the "best" supported timer
it can initialize.
2023-08-04 16:06:47 +03:00
Bananymous ca5a097ef5 Kernel: Add function to retrieve boot time as timespec 2023-08-04 16:06:47 +03:00
Bananymous 1f8a5f0ce5 Kernel: F11 now prints current time to debug output
This allows better timer percision and system freeze checks
2023-08-04 15:22:51 +03:00
Bananymous 1fa7a1cac4 Kernel: Add basic HPET support to replace PIT if exists
This works same way as the PIT implementation; calls Scheduler every
milli second.
2023-08-04 15:22:51 +03:00
Bananymous ea4a70c3b3 Kernel: Move sleep() implementation to TimerHandler 2023-08-04 15:15:00 +03:00
Bananymous aa0929614a Kernel: Add more structures to ACPI 2023-08-04 15:13:47 +03:00
Bananymous 3c31fc9c4b Kernel: Implement basic MMIO functions
This is equivalent to IO.h except for memory mapped io instead of
IO ports
2023-08-04 15:12:29 +03:00
Bananymous 7eb2c140fe Kernel: Move RTC to Timer directory
PIT ms counter seems to be off by multiple seconds/minute. I will
be probably changing to HPET for system time
2023-08-04 11:12:16 +03:00
Bananymous 659adb89a6 Kernel: Start work on abstracting Timers 2023-08-04 10:29:42 +03:00
Bananymous dd17124c77 Kernel: Remove unnecessary timer check from Scheduler 2023-08-04 10:29:42 +03:00
Bananymous 643e87a076 Kernel: Threads are deleted sooner and cleaner
We now delete threads when
    1. it is marked as Terminated and is the current thread
    2. it tries to start execution in Terminated state

This allows us to never have thread executing in Terminated state
2023-08-04 10:29:42 +03:00
Bananymous 20eafb4cc4 Kernel: align userspace stacks
I was getting #GP on sse instructions
2023-08-03 18:09:48 +03:00
Bananymous 3139391e06 Kernel: Change PageTable API
Getting free pages not reserves them, so you don't have to hold
the page table lock :)
2023-08-02 22:09:14 +03:00
Bananymous 64ad752e73 Kernel: PageTable now supports reserved pages
You can now map pages as reserved, so that they will not be given
from get_free_page() or get_free_contiguous_pages().
2023-08-01 16:35:54 +03:00
Bananymous a78a7ed156 Kernel: Cleanup returns from any kind on interrupts 2023-08-01 14:23:50 +03:00
Bananymous 2a851b52f1 BuildSystem: Edit build flags regarding sse and warnings 2023-07-31 22:31:17 +03:00
Bananymous b245a55ea0 Kernel: store/load sse/mmx/fpu state on isr/irq/syscall
I haven't tested this yet but should be fine. This will be optimized
to only save state from threads that are using it
2023-07-31 22:28:57 +03:00
Bananymous c4f6c859c1 Kernel: Generally improve signals 2023-07-31 22:28:18 +03:00
Bananymous 1a6100f083 Kernel: Cleanup signal trampoline 2023-07-30 15:58:35 +03:00
Bananymous de927b6b05 Kernel: Remove is_in_syscall from Thread 2023-07-30 14:49:51 +03:00
Bananymous 1d7795e22c Kernel: Hardware exceptions now sends signals to userspace 2023-07-30 14:34:15 +03:00
Bananymous abe8810d47 Kernel: raise() now force sends signal 2023-07-30 14:17:07 +03:00
Bananymous acf125c853 Kernel: Signals are not queued anymore
Posix doesn't require signal queing if you don't use sigqueue() which
we don't support. Process also has its own pending signal mask.
2023-07-29 16:54:31 +03:00
Bananymous 9279bbbd19 Kernel: TTY now sends SIGINT on ^C to foreground process 2023-07-28 18:10:09 +03:00
Bananymous 9fd9a8b5b1 Kernel: Mark reading section from StorageDevice as terminate critical 2023-07-28 18:09:35 +03:00
Bananymous 3c6be319b1 Kernel: Restructure process and thread termination
When we want to kill a process, we mark its threads as Terminating
or Terminated. If the thread is in critical section that has to be
finished, it will be in Terminating state until done. Once Scheduler
is trying to execute Terminated thread it will instead delete it.

Once processes last thread is marked Terminated, the processes will
turn it into a cleanup thread, that will allow blocks and memory
cleanup to be done.
2023-07-28 18:06:20 +03:00
Bananymous 104894c0c7 Kernel: Rewrite DiskCache
We now cache only clean pages since I don't want to think about
syncing the disk later.
2023-07-27 22:22:39 +03:00
Bananymous 2f52001c6d Kernel: Locks allow locking after locker is invalid
SpinLock and RecursiveSpinLock will now allow locking after the initial
locker is invalid. This allows us to kill threads even if they are holding
internal locks
2023-07-27 18:52:51 +03:00
Bananymous f609170a6a Kernel: DiskCache uses are now done without interrupts
This allows disk cache to not be invalid state after partial read/write
2023-07-27 18:52:51 +03:00
Bananymous 9f75b04714 Kernel: Scheduler can now check if tid is valid
Tid can become invalid if the thread is already terminated
2023-07-27 18:34:06 +03:00
Bananymous 7b4a2fe3d1 Kernel: Process::exit() unblocks the whole lock before blocking 2023-07-24 22:29:59 +03:00
Bananymous f6ee4b3496 Kernel: Implement SYS_GET_PID and SYS_TCSETPGID
we don't have consept of process groups yet
2023-07-24 22:29:59 +03:00
Bananymous 1ef0534b69 Kernel: TTY now stores foreground process pid
this will be process pgid when we have process groups
2023-07-24 22:29:59 +03:00
Bananymous b9dd1895bb Kernel: add Thread::queue_signal() 2023-07-24 22:26:10 +03:00
Bananymous be47743dfa Kernel: Scheduler can now block threads based on tid 2023-07-24 22:24:21 +03:00
Bananymous 57798e5d76 Kernel: remove Semaphore::is_blocked
this will not mean anything after semaphores can spuriously wake up
2023-07-24 22:23:13 +03:00
Bananymous cd64c1cfec Kernel: add is_tty() to inode 2023-07-24 22:19:59 +03:00
Bananymous f76d921e25 Kernel: you can now ask process if it is userspace process 2023-07-23 18:54:10 +03:00
Bananymous a2bf474013 Kernel: OpenFileDesctiptor can now return inode of fd 2023-07-23 18:52:33 +03:00
Bananymous 9729e5a05b Kernel: Change signal kernel API
return rsp and rip are now stored per thread
2023-07-23 18:33:10 +03:00
Bananymous 2dce0a0415 Kernel: Userspace signal handlers are now called one at a time
I added a syscall for telling the kernel when signal execution has
finished. We should send a random hash or id to the signal trampoline
that we would include in the syscall, so validity of signal exit can
be confirmed.
2023-07-23 13:34:53 +03:00
Bananymous d560137ae6 Kernel/LibC: add SYS_SIGNAL/signal() 2023-07-21 20:08:13 +03:00
Bananymous c12f4fb40f Kernel: Make signals more POSIX 2023-07-21 20:01:12 +03:00
Bananymous 10169d773d Kernel/LibC: Add SYS_KILL/kill() 2023-07-21 19:27:38 +03:00
Bananymous b78596dcf4 Kernel: Scheduler now sends queued signals 2023-07-21 19:27:10 +03:00
Bananymous 40f7c6b8fa Kernel: Make signals thread specific 2023-07-21 19:00:59 +03:00
Bananymous 8063700d7b Kernel: add default signal actions 2023-07-21 18:02:35 +03:00
Bananymous 70f89ed1fc BuildSystem: Strip kernel. We will add the map once we use it 2023-07-21 15:47:31 +03:00
Bananymous c2cf98e32f Kernel/LibC: Add bareboness signals
You can now call raise() to raise a signal. Signal handlers are
not yet supported, but the handling works :)
2023-07-21 15:45:02 +03:00
Bananymous a1db032ba9 Kernel: kernel memory takes now full pml4e
This allows flags to work properly
2023-07-21 13:47:05 +03:00
Bananymous 5babd7b4f2 Kernel: remove PAGE_FLAGS_MASK as that was not correct anymore
After I added NXE bit, the flags mask is no longer valid
2023-07-21 12:01:50 +03:00
Bananymous c0029a2fa2 Kernel: Don't map kernel executable memory as writable 2023-07-21 11:17:39 +03:00
Bananymous 4e35b8b49d Kernel: Syscalls now get the interrupt stack 2023-07-21 11:04:16 +03:00
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 94af856db0 Kernel: cleanup sys_exec()
We now scope everyting so desctructors get called
2023-07-19 23:20:39 +03:00
Bananymous bf5d74b8bc Kernel: fix memory leak in PageTable
PageTable used to leak 2 pages on creation and other two on deletion
2023-07-19 23:17:39 +03:00
Bananymous fd9210ba9e Kernel: FixedWidthAllocator creation can now fail 2023-07-19 18:07:24 +03:00
Bananymous 66d9260257 Kernel: VirtualRange creation can fail 2023-07-19 17:56:26 +03:00
Bananymous 5d2bfc858e Kernel: SYS_FORK can now fail instead of panicing on error 2023-07-19 17:47:12 +03:00
Bananymous 8b34880064 Kernel: Fix bug which made bochs unbootable
We could not boot if ATABus did not have valid primary device.
2023-07-13 15:53:09 +03:00
Bananymous 98c698d9ec Kernel: Enable global bit on kernel pages 2023-07-13 15:23:25 +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 c3a71e94a9 Kernel: Fix ATA disk and partition numbering 2023-07-13 12:12:47 +03:00
Bananymous 00409ffa60 Kernel: Ext2Inode::create_file actually sets the inode data
We used to just create inode without touching its memory.
2023-07-13 10:20:56 +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 178fc00905 Kernel: creat() mode now has to be access mode
We provide the S_IFREG in creat
2023-07-10 15:34:41 +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 46e1419e70 Kernel: O_APPEND is now supported 2023-07-10 15:11:27 +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 b6c4a2dbf1 Kernel: Edit lock scopes and make string copy able to fail 2023-07-07 23:12:19 +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 5a8eb51968 Kernel: TTY now unblocks semaphore after read
This allows concurrent reads not fully reading the buffer not block
indefinately.
2023-07-06 21:32:34 +03:00
Bananymous a74422281f Kernel: Add O_CLOEXEC 2023-07-06 20:00:33 +03:00
Bananymous a45f9ee76b Kernel: Remove spammy process/thread exit printing 2023-07-06 10:34:46 +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 57e59d998f Kernel: Add enum for ISR name to number 2023-06-18 23:24:27 +03:00
Bananymous 44fb3945df Kernel: General allocator takes first valid vaddr as parameter 2023-06-17 22:23:34 +03:00
Bananymous 95c4e608de Kernel: Move print during boot 2023-06-12 23:45:36 +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 7aeb8e4d36 Kernel: allocate thread stacks from 0x300000 onwards
I had a problem where thread stack was overlapping with elf loading
2023-06-12 01:02:19 +03:00
Bananymous 58ec4d6a31 Kernel: Fix bug in elf loading
We were allocating one extra page
2023-06-12 00:59:19 +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 78536f9678 Kernel/Userspace: Add basic init process
This process parses /etc/passwd and promps login screen.
When an username is entered, it will launch that users shell
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 3181ea7b4d Kernel: GeneralAllocator and FixedWidth allocator invalidate TLB caches
We were getting random exceptions when reallocating same addressess and
this fixes that problem :)
2023-06-11 15:57:48 +03:00
Bananymous 83a6e6f637 LibC: Reorder some syscalls 2023-06-11 03:29:22 +03:00
Bananymous 64890bb640 Kernel: Add SYS_OPENAT 2023-06-11 03:29:22 +03:00
Bananymous caca6dc701 Kernel: Exceptions will now enable interrupts before calling exit()
this allows scheduler verification on reschedule() not panic
2023-06-11 03:29:22 +03:00
Bananymous aa86125f2b Kernel: Implement SYS_FSTAT 2023-06-11 03:29:22 +03:00
Bananymous 14aeb8de10 Kernel: we don't panic anymore on unrecognized syscall 2023-06-11 00:18:48 +03:00
Bananymous 691b17e0cc Kernel: allow open() call with O_SEARCH 2023-06-11 00:18:34 +03:00
Bananymous eae6119039 Kernel: Add syscall for reading directory entries 2023-06-11 00:18:08 +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 c0fe4756cb Kernel: SpinLocks now reschedule if they cannot aquire the lock
This allows us to not actually spin doing nothing while waiting for
another (not executing) to release the lock. This api won't probably
work when we get to SMP
2023-06-09 00:53:32 +03:00
Bananymous 5032e79be3 Kernel: Process::exit() now uses the new Scheduler::reschedule()
We use this new function while waiting for all blocking threads to
resume execution
2023-06-09 00:49:19 +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 841584ccbd Kernel: get_free_contiguous_pages works with non-page aligned addresses
also fix bug in ordering
2023-06-06 02:03:23 +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