kdb documentation

[Joe Wong]

Hello,

  Is there any detailed documentation on how to interpret the
information output by 'bt' command. I would like to know how to relate
the address on the screen to the source code, how to locate a variable
within a certain stack frame and print its value for debugging.

In addition, is there any way to instruct gcc to build a CODE file that
contain both assembly code and the original C source code?

TIA.

- Joe