On 08 Oct 2009, at 9:08 AM, Rajat Jain wrote:
Hi,
3) And finally, in order to complete this change and to ensure my
applications are awrae of it and are doing the needful to restrict
themselves in only 2G, do I also need to make changes in
the glibc or
the gcc?
No, you don't need changes to glibc or gcc.
I think he will need to. In the ELF user space executables in most of
the cases, the address at which each synbol (function / data) will
go is
generally fixed at compile time. So I think mosty of the
applications in
user space will need a recomile with a compiler that is aware of the
new
2G/2G split.
Interesting. I've previously used 2G/2G split (some years ago, before
64b was prevalent) quite a bit and never needed to recompile existing
binaries and libraries on the distro, and never had issues. Perhaps
the default addresses are quite low (well below 2G)? Also, how does
ASLR ( http://en.wikipedia.org/wiki/
Address_space_layout_randomization ) play into this?
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