This article is a quick example of how to add a system call to OpenBSD. The following description is based on OpenBSD 3.4-beta on i386 machine architecture. Also, it is assumed that readers are familiar with building the OpenBSD kernel.This article describes how the m88k-specific backend of the GNU C compiler, gcc, was fixed, from the discovery and analysis of the problems to the real fixing work. Since it started with almost zero gcc internals knowledge, it should be understandable by anyone able to read C code, and proves that diving into gcc is not as hard as one could imagine.
Adding OpenBSD System Calls; Diving into GCC: OpenBSD & m88k
About The Author
Eugenia Loli
Ex-programmer, ex-editor in chief at OSNews.com, now a visual artist/filmmaker.
Follow me on Twitter @EugeniaLoli
Who cares, just don’t click and read here.
More like O’Reilly recycling their content: take a look at http://www.onlamp.com/topics/bsd/OpenBSD – first two topics are the ones here. The m88k article is second from the top.
Anyway, actually writing about the articles themselves — very interesting reading…
Could be worse. You could be reading /.