Linux

hi,
For some special reason , I'd like to control the memory address for the shared libraries in my dynamically linked process.
And it is the "ld" which interpret the dynamically linked library, and in my system, the "ld-linux.so.2" is put at 0x00812000. Then I use "prelink -r" command to change it address into "0x40000000", and use the "gcc -specs" to choose the new "ld-linux.so.2" as my default interpreter, the the program is compiled and when I use "ldd" I can see the "ld-linux.so.2" is put at "0x4000000" , but when I run the process, it crashed? I find it crash at "_dl_bebug_initialize()" , which access a not exist memory address, "0x008294e0" , I think it is the "got" in the former image.
so is there any solution? Thanks a lot!


ps :
Though I have update the gcc specs to choose the new "ld-linux.so.2" as my default interpreter, how can I choose other libraries, such as "libc.so.6" and "libgcc_s.so.1".

This does not make a whole lot of sense to me. What is your 'special reason'?

You want use dld to load external references with a predefined address in shared memory? Is that what you mean?

Here is why I ask: we get unusual requests for things, things for which the requester has already decided 'how to do it'. What are you trying to do? We don't want to know how you think it ought to be done - just please tell us what you need.

Are you trying to speed up application startup? Create a partially linked application?

Actually, I'd like to manage the memory space of a process. We develop a process level virtual machine, which could run different binary code( MIPS , SPARC, ..) on different platforms( IA-32...). So I wish I could allocate all the low memory space ( 0~1G) to the guest process(e.g , the entry of a normal mips process begins at 0x004001a0). While the default memory address allocated for ld-linux.so is at 0x0082100, so I'd like to move it to another place, same to another shared libraries.