If /lib/ld.so is hosed and you cannot run any dynamically linked program, then you might be able to start programs in /altroot by running something similar to..

If /lib/ld.so is hosed and you cannot run any dynamically linked program, then you might be able to start programs in /altroot by running something similar to... LD_LIBRARY_PATH=/altroot/lib:/altroot/usr/lib /altroot/lib/ld.so /altroot/bin/sh ...so that you run the dynamic linker directly, as a wrapper program.