I looked through the Intel vtune driver once (the kernel module is GPL, the software for analysing its output is closed) and IIRC, there was a routine in there for scanning for the symbol table. Given that, I suspect that there isn't an equivalent (at least not one that's useful for vtune) but that it is still possible to find it...

Any particular reason for needing to find it? The vtune driver patches the syscall table to call its own functions, so that it can gather statistics.

Yes, there is a sys_call_table, it's just that Linus got rid of the export for it. However, it is still possible to determine its location in kernel space using the techniques in the article "Linux on-the-fly kernel patching without LKM" in Phrack 58.

I've used this technique in a rootkit kernel module (unreleased - don't ask) and it works flawlessly.

Cheers,
Haggis