On 06/23/2011 02:35 PM, Agner Fog wrote: > It is possible to put absolute addresses into a .so and it works. I > tried this in Ubuntu, and it works with 32 bit absolute addresses in a > 32 bit .so, and with 64 bit absolute addresses in a 64 bit .so. The only > thing that doesn't work is 32 bit absolute addresses in a 64 bit so. In > many cases, this is faster than making PIC. I guess this was implemented > for the sake of virtual tables, jump tables, etc. My question is: Does > this work in all versions of Linux, BSD, MacOS? Which platforms or > versions do not allow absolute addresses in shared objects? I don't understand how an absolute address can ever do anything useful in a shared object. By definition, you don't know where that shared object will be loaded. Can you provide an example of a 64-bit absolute address in a 64-bit shared object? Andrew.
