ULIX: Literate Unix
A diary documenting the implementation of ULIX-i386
Welcome to the ULIX blog.
Ulix (Literate Unix) is a Unix-like operating system developed at
University of Erlangen-Nürnberg.
I use D. E. Knuth's concept of
for the implementation and documentation. The goal was a fully working system which can be
used in operating system courses to show students how OS concepts (such as paging and scheduling)
can be implemented. Literate programs are very accessible because they can be read like a book;
the order of presentation is not enforced by program logic or compiler restrictions, but instead
is guided by the implementer's creative process.
Ulix is written in C and assembler for the Intel architecture. The literate programming
part is handled by noweb.
On this page I document my progress with the implementation.
|Debugging the Kernel with Bochs (14.08.2011) |
All of that together makes debugging the kernel a bit easier:
Bochs can show information about registers, the GDT, TSS and
many more interesting things.
Debugging the Ulix kernel requires use of some tools: I use
Bochs (a fresh compile with the configure options
--enable-debugger and --enable-disasm).
Compared to a standard configuration of Bochs, I do a few
things differently via the config file (bochsrc.txt):
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