Segmentation faults running most programs

I was playing around, now I'm in a pickle: :(

Tons of programs give me a "Segmentation fault". I have a modified /etc/profile that loads /mnt/us/.bashrc that loads all my other directories, libs, and binaries in /mnt/us/usr and /mnt/us/bin ...

anything I can do other than kubrick?

even /bin/vi is a Seg fault...

I rebooted the Kindle multiple times (3 or 4).