Stack trace from C program

[Sad Clouds <cryintothebluesky%googlemail.com@localhost>]

Hi, is there a sane way of generating a stack trace from withink a C
program on *BSD?

For example, Solaris has walkcontext() and printstack() functions. It
doesn't look like there is anything similar on NetBSD.

Is there a portable way of implementing those functions, or does it
heavily depend on machine architecture and operating system?