An application suite for the rou2exOS kernel. All aplications must follow (implement) the syscall ABI specification.

Languages currently implementing (parts of) the ABI:

• C
• C++
• Go (using TinyGo)
• NASM
• Rust

Each listed language has its workspace in a related directory in the repository root. Each implementation example should include:

• linker script (linker.ld)
• Makefile
• README.md (optional)
• the source code file(s)

The linker script should ensure proper memory alignment with the .text section at the beginning.

At the moment, all executables (elf-x86-64) have to be converted into a flat memory binary file. ELF files cannot be loaded directly yet. See tooling below for more.

All executable should be of the format of elf64-x86-64 (OUTPUT_FORMAT). The r2 kernel is now capable of loading and running ELF executables, just provide a file with the .ELF extension.

dir
 -> PRINT.ELF
run PRINT

To run a binary (.BIN) in the r2 shell, it has to be loaded onto a floppy image with FAT12 filesystem (see the root Makefile). When it's loaded, boot the system using attached ISO image and the floppy image:

qemu-system-x86_64 -boot d -m 2G -cdrom r2.iso -fda fat.img

In the shell, ensure the file is there and then just load it and run (do not include the binary extension):

dir 
 -> PRINT.BIN
runb PRINT

Tooling strictly depends on the selected language. However, these tools are required to be able to compile, link, convert, and debug the source code:

• mtools
• llvm tools
• lld
• qemu
• gnumake
• gcc (cross compiler)
• nasm