One thing on my ever-growing ToDo list was to build my own Linux system since I stumbled upon Linux from Scratch (LFS) a couple of years ago. LFS is an online book that guides you through the whole process of building your own minimal Linux system. It consists of several phases: initially, you create partitions …
Throughout the last year’s I found numerous (security) bugs in the BSDs (FreeBSD, OpenBSD, NetBSD). I had a great time researching those kernels. The community is very technically sophisticated and very supportive. Not to forget the great read “The Design and Implementation of the FreeBSD® Operating System” that accompanied my adventures over there. I can …
Learning by doing always works quite well. Getting to know the low-level programming tool chain is a vital for understanding the low-level details of the OS in general. So I thought writing some shellcode in x64 assembly and loading it with a simple loader written in C would be a good starting point for becoming …
