How to execute an object file: Part 2
April 02, 2021 12:00PM
Continue learning how to import and execute code from an object file. This time we will investigate ELF relocations....
A deep-dive into Cloudflare’s autonomous edge DDoS protection
March 18, 2021 2:18PM
DDoS Gatebot dosd Linux XDPIntroducing our autonomous DDoS (Distributed Denial of Service) protection system, globally deployed to all of Cloudflare’s 200+ data centers, and is actively protecting all our customers against DDoS attacks across layers 3 to 7 (in the OSI model) without requiring any human intervention....
Conntrack turns a blind eye to dropped SYNs
March 04, 2021 12:00PM
Conntrack Linux Network Kernel TracingWe have been dealing with conntrack, the connection tracking layer in the Linux kernel, for years. And yet, despite the collected know-how, questions about its inner workings occasionally come up. When they do, it is hard to resist the temptation to go digging for answers....
How to execute an object file: Part 1
March 02, 2021 12:00PM
Linux Compiler Programming Software Deep DiveEver wondered if it is possible to execute an object file without linking? Or use any object file as a library? Follow along to learn how to decompose an object file and import code from it along the way....
Diving into /proc/[pid]/mem
October 27, 2020 12:00PM
Deep Dive Programming LinuxA few months ago, after reading about Cloudflare doubling its intern class, I quickly dusted off my CV and applied for an internship. Long story short: now, a couple of months later, I found myself staring at Linux kernel code and adding a pretty cool feature to gVisor....
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