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====== modify syzkaller's system call descriptions ======

To be able to test system calls, syzkaller needs descriptions of the system calls for each target OS. The descriptions are stored in .txt files inside the sys folder of syzkaller. For FreeBSD the folder is <syzkaller>/sys/freebsd/. Modifications of these files require three steps in order to integrate it into syzkaller.

**Step 1: Generate .const files from .txt files.** 

This requires FreeBSD source files on the host. I copied them to ~/freebsd/usr/src.
  
  make extract TARGETOS=freebsd SOURCEDIR=~/freebsd/usr/src

**Step 2: Generate Go code for syzkaller based on the .txt and .const files**

This requires clang-format. If not already installed

  sudo apt install clang-format
  
After that, run 

  make generate
  
**Step 3: Build syzkaller on host and syz-executor on FreeBSD VM**

See [[syzkaller_with_ubuntu_host_and_freebsd_guest#build_syzkaller]]