Linking 32-bit library to 64-bit program

Question

I have a 32-bit .so binary-only library and I have to generate 64-bit program that uses it. Is there a way to wrap or convert it, so it can be used with 64-bit program?

Answer 1

It is possible, but not without some serious magic behind the scenes and you will not like the answer. Either emulate a 32 bit CPU (no I am not kidding) or switch the main process back to 32 bit. Emulating may be slow though.

This is a proof of concept of the technique.

Then keep a table of every memory access to and from the 32 bit library and keep them in sync. It is very hard to get to a theoretical completeness, but something workable should be pretty easy, but very tedious.

In most cases, I believe two processes and then IPC between the two may actually be easiest, as suggested othwerwise.