[SunHELP] Running 32 bits apps on 64 bits kernel

[DAUBIGNE Sebastien - BOR ( SDaubigne@bordeaux-bersol.sema.slb.com )]

Could someone explain or give links to good docs about  32 bits apps running
on 64 bits kernel ?

Are there any "compatibility" libs involved in the process ? How does the
lib loader select 32/64 bits libs ?
What are the performance issues for 32 bits apps on 64 bits kernel compared
to 32 bits kernel ?

Could I take every 32 bits app and make it run on 64 bits kernel, or are
there compatibility issue ?

Are usual Solaris tools (in /usr/bin and co.) compiled as 64 bits ELF when
the 64 bits OS is installed, or only kernel+drivers ?

Thanks for help, I will summarize.

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Sebastien DAUBIGNE 
sdaubigne at bordeaux-bersol.sema.slb.com
<mailto:sdaubigne at bordeaux-bersol.sema.slb.com>  - (+33)5.57.26.56.36
SchlumbergerSema - SGS/DWH/Pessac