On Tue, May 21, 2013 at 5:06 AM, Abin Xu <abin1525@gmail.com> wrote:
But the file "error" shows that "/lib/libc.so.6" was loaded to address 0!
No, it does not.
14690: file=/lib/libc.so.6 [0]; needed by ./test [0]
14690: file=/lib/libc.so.6 [0]; generating link map
14690: dynamic: 0x0043cd7c base: 0x00000000 size: 0x00191988
14690: entry: 0x002c5e40 phdr: 0x002af034 phnum: 10
Presumably you are mis-interpreting base:0x00000000 is the load
address. It is not.
What it is is the relocation (difference) between linked-at address
and loaded-at address.
Usually, shared libraries are linked at address 0, and when they are,
the relocation is indeed the same as loaded-at address. But your
libc.so.6 has been prelinked to address 0x002af000, and was loaded at
that address, giving you 0 relocation.