Read man rpm. Via rpm, identify the rpm package /usr/bin/perl belongs to (rpm -qf /usr/bin/perl). Run rpm -ql $package to get at the location of libperl.so and check whether it is where expected. Run rpm -verify (or such, consult the manual page of rpm) to verify the integrity of libperl.so found in the output of the package list. If things are wrong (as I suppose they are) re-install the perl core package.