Stack trace Utility for Liniux64

["Kakulavarapu, Prasad" <prasad.kakulavarapu@xxxxxxxxx>]

 Hello,

Is there a Stacktrace utility for Linux64? We need this to unwind the stack
frames to get the function call hierarchy. Needed for debugging after an
exception.

Any info on such utility for Linux32 also would be helpful; we can port it
to Linux64. I learnt that a library function called tracebk() with same
functionality was available on Cray.

Appreciate any info.

Thanks,
Prasad