A simple operating system made from C!
A similar process is used in the Meaty Skeleton.
You will need these dependencies in order to complete this build:
- x86_64-elf toolchain, as discussed here (explicity called
x86_65-elf-...). - Git.
- Xorriso, the .iso creation engine used by grub-mkrescue.
- GNU make 4.0 or later.
- NASM (The Netwide assembler) for build the assembly object files.
- Qemu, optionally for testing the operating system. This build requires a GNU/Linux system, or a similar enough system. The BSD systems may almost work. OS X is not supported but can possibly be made to work with some changes. Windows is not supported, but Windows environments like Cygwin might work, also Windows Subsystem For Linux (WSL) will work.
Use the i686-elf toolchain from here or here and use the -64 option and then install the packages xorriso nasm, and probably a few more ...
To build the OS simply run the iso make target. This will compile / link and generate a bootable iso. If you don't need an iso use the build target.
Finally, the run target can be used to run QEMU, or the run-uefi to run QEMU with UEFI support. It will run the iso target it self if the iso hasn't been made yet.