If you can modify the kernel, you could modify binfmt_elf.c in the case of the Linux kernel, and log out the load address to dmesg or something like that.
Another alternative, which I believe are both options available with PIN and DynamoRIO, is to implement or use an existing ELF loader, forking yourself, and loading in the target binary of interest at a known location.
Another alternative, which I believe are both options available with PIN and DynamoRIO, is to implement or use an existing ELF loader, forking yourself, and loading in the target binary of interest at a known location.