In GDB you can do add-symbol-file <library> <address> to load symbols files at a particular address. What's the equivalent in LLDB?
I have already tried
image add <symbol file>
target modules load --file <symbol file> .text <address>
but this doesn't seem to fix the unknown symbols
The commands were correct, it turns out I was just missing additional symbols.
I was able to work out the missing symbol file though looking at cat /proc/$(pidof <my_program>)/maps | grep xp | grep <first 5-7 characters of the missing address>
Then I loaded them in as normal
image add <missing symbol file>
target modules load --file <symbol file> .text 0x<address>