Digging up some old code

A year or so ago I started writing my own little debugger, just basically so I could know a bit more about what's going on under the hood in such programs. It was a natural follow-on from writing my own compiler/linker, which I sort of stopped working on after I satisfied myself I knew how to write such a thing (and came across LLVM which does that sort of thing about a thousand times better than I was going to be able to do on my own). Life events got in the way of my doing too much with it at the time, but here's the code anyway for those who might be curious - http://hu.gs/~emily/debugtoy.tar.gz It uses the Linux ptrace() system call and my own code to parse ELF and DWARF binaries; there are libraries out there that can help you do the latter, but as I say I was doing this to learn my way around the format myself. It can attach to processes, halt/single-step them, display/edit registers and memory, figure out the name of the function you're in, and identify the line in the source code that corresponds with the current instruction pointer.