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Posts published in March 2018

Assembly Challenge : Jump to a non-relative address without using registers

Sinaei 0

During developing a dispatch table for some instructions in binaries, one of the challenging problem which I faced, was changing the registers state in a way that doesn’t affect the program flow! So it might seem simple at first glance but what makes it complex is that I can’t use relative jumps or relative calls because, in some situation, I might be far away from .text segment of my binary. It causes me to explore the solutions about far jumps…

Useful Configs for NGINX

Shahriar 2

After posting the first of my linux SysAdmin quick config sample series titled “Useful Configs for squid” (which you can read here). I decided to write another post, this time about the powerful and popular web/cache server NGINX! I spent quite some time reading through nginx official docs and other blogs/websites while testing each configuration directive in different scenarios. Some of the options presented in this post do not have good or any documentation. I hope you find them useful!…