the powerpc-wrs-vxworks-readelf program should be installed with windriver on windows, where you can use cygwin to get the other parts (a shell, awk, and grep).
On linux, you can use the readelf from a binutils compiled with multi-target support, or a custom build bintuils for the powerpc-wrs-vxworks target. See
http://www.chiefdelphi.com/forums/sh...d.php?t=109385 for some info on that (and building your own gcc). Note that building binutils (which includes readelf) for powerpc-wrs-vxworks does not need the vxworks headers, nor does it require any patching. It should just work.