Linux Kernel Development and Writing a Simple Kernel Module (2018)

If you're not familiar with the kernel you will probably try to use some specific thing from the C standard library only to find out that it doesn't work or isn't defined. You're looking at kmalloc() as the kernel equivalent for malloc(), though I think normally for something like a device driver you'd allocate pages of memory (via one of the __alloc_pages related calls) and manage it yourself from there. The best way is to use the source, look at other examples and search the code. But there is an API, and most common things have not really changed for decades now

I reccomend https://kernelnewbies.org/ as a first stop for the curious (although I might also reccomend Emacs, contrary to their tutorial ;).

I wish there would be more guides like this for macOS KEXT development. Easy to read, clean code examples, and quick to get started.

I was planning to port a driver for a specific PCI 802.11 NGFF WiFi device from FreeBSD or Linux, but it's really hard to find exhaustive guides on KEXT development, whereas Linux has the amazing guide at https://www.kernel.org/doc/html/latest/driver-api/80211/inde....