pjht/os
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
431 Commits 5 Branches 0 Tags 3.4 MiB
C 87%
Assembly 9.6%
Makefile 1.9%
Ruby 1.4%
HTML 0.1%
master
Go to file
pjht cc48e81b07 Remove ps2 driver from makefile
2021-07-04 10:08:05 -05:00
.github Update issue templates 2020-08-01 09:00:13 -05:00
devfs Debug message changes 2020-09-06 08:11:12 -05:00
init Stash pop 2021-02-28 13:46:33 -06:00
initrd add .gitkeep files for directores whose contents are ignored 2020-07-28 10:34:16 -05:00
initrd_drv initrd driver now properly handles a request to read more data than available 2020-08-23 17:34:24 -05:00
kernel Stash pop 2021-02-28 13:46:33 -06:00
libc Stash pop 2021-02-28 13:46:33 -06:00
patches Change stdint to be provided by gcc 2019-08-28 17:33:46 -05:00
pci Fix some isues with the PCI driver 2020-08-30 17:01:50 -05:00
psinfo make debug now uses the plain gdb binary 2020-08-01 09:04:18 -05:00
stuff Remove unnecessary files 2020-07-24 07:14:52 -05:00
sysroot add .gitkeep files for directores whose contents are ignored 2020-07-28 10:34:16 -05:00
tar_fs Stash pop 2021-02-28 13:46:33 -06:00
vfs Remove some debug output 2020-08-31 12:19:16 -05:00
vga_drv Stash pop 2021-02-28 13:46:33 -06:00
.gdbinit Add a very basic exit function and fix kmalloc. 2019-08-25 17:32:08 -05:00
.gitignore Untrack compiled binaries 2020-08-23 08:51:33 -05:00
bochsrc.txt Fix vfs saying the message was sent from init's stdio mailbox. 2019-07-27 11:11:28 -05:00
bochsrc.txt.old Fix vfs saying the message was sent from init's stdio mailbox. 2019-07-27 11:11:28 -05:00
docindex.html Add libc documentaion + libc cleanup 2020-07-26 15:38:29 -05:00
ext2.img Essentially merge ext-prog-libc 2019-05-01 09:39:23 -05:00
image.img Add new partitioned image 2019-04-21 07:38:55 -05:00
install.rb Start work on an install script and add a Vagrantfile for a VM to run it 2019-10-20 09:43:17 -05:00
LICENSE Add GPL 2021-04-12 15:54:05 -05:00
Makefile Remove ps2 driver from makefile 2021-07-04 10:08:05 -05:00
network.rb Remove most code for a blank start 2019-02-09 12:52:45 -06:00
orig_ext2.img actually remove lfs 2019-04-19 10:17:04 -05:00
README.md Update README.md 2021-05-17 08:44:16 -05:00
Vagrantfile Start work on an install script and add a Vagrantfile for a VM to run it 2019-10-20 09:43:17 -05:00

README.md

os

This is a hobby OS based on a microkernel. It currently supports:

  1. Basic preemptive multitasking with task states & exiting.
  2. Physical & virtual memory management
  3. Interrupts.
  4. The PIT, used to do preemption.
  5. The serial port, used as an output for logs. (driver in kernel, will eventually be moved out)
  6. RPC as the IPC mechanism
  7. A working VFS and devfs
  8. VGA text mode

Building

To build the OS, you will need custom patched versions of GCC and Binutils targeted for my OS.

Building the cross-compiler

The instructions for building a cross compiler are here, though a few changes need to be made. First, you must download GCC 9.2.0 and Binutils 2.32, or the patches may not apply correctly. Next, you need to apply the patches located in the patches/ directory. Set $TARGET to i386-myos, not i686-elf. When running configure for both Binutils and GCC, you must pass --sysroot=<path to cloned github repo>/sysroot as an extra argument, otherwse the compiler will not be able to find the libc headers. Otherwise, the build is as normal.

Once the cross-compiler is built, the OS can be built by simply typing make.

Additional setup (on Linux or Mac (Unsupported on Mac) )

To run & debug the OS, you willl need to install QEMU, GRUB, and GDB.

Installing GRUB on:

  1. Ubuntu. GRUB is already installed.
  2. Arch. If you have chosen GRUB as your bootloader, run sudo pacman -S dosfstools libisoburn, as arch by default does not have the necessary tools for grub-mkrescue to work, otherwise run sudo pacman -S grub dosfstools libisoburn
  3. Another linux distro. GRUB is likely already installed, but if it is not, you will need to use your distribution's package manager to install GRUB.
  4. Mac. You will need to install Homebrew, then run brew install i386-elf-grub

Installing QEMU on

  1. Ubuntu. Run sudo apt get install qemu
  2. Arch. Run sudo pacman -S qemu qemu-arch-extra
  3. Another linux distro. Use your distribution's package manager to install QEMU.
  4. Mac. Run brew install qemu

Installing GDB on

  1. Ubuntu. Run sudo apt get install gdb
  2. Arch. Run sudo pacman -S gdb
  3. Another linux distro. Use your distribution's package manager to install GDB.
  4. Mac. Run brew install gdb

After this, you can run the OS in QEMU by typing make run, or run the OS and start the debugger by typing make debug. The serial port output of the OS is redirected to a file callled serout in the main directory.