KTRACE(1)                                               KTRACE(1)

     NAME
          ktrace - interpret kernel stack dumps

     SYNOPSIS
          ktrace [ -i ] kernel pc sp [ link ]

     DESCRIPTION
          Ktrace translates a hexadecimal kernel stack dump into a
          sequence of acid(1) commands to show the points in the call
          trace.  The kernel argument should be the path of the kernel
          being debugged, and pc and sp are the PC and SP values given
          in the stack dump.  For MIPS kernels, the contents of the
          link register must also be supplied.

          A stack trace consists of a ktrace command followed by a
          series of lines containing fields of the form
          location=contents:
          ktrace /kernel/path 80105bc1 8048e174
          8048e114=80105ac6 8048e120=80140bb4 8048e134=8010031c
          8048e16c=80137e45 8048e170=80105bc1 8048e178=80137e62
          ...

          The trace can be edited to provide the correct kernel path
          and then pasted into a shell window.  If the -i option is
          present, ktrace instead prompts for the contents of the mem-
          ory locations in which it is interested; this is useful when
          the stack trace is on a screen rather than in a machine
          readable form.

     SOURCE
          /sys/src/cmd/ktrace.c

     SEE ALSO
          acid(1), rdbfs(4)

     BUGS
          When examining a kernel trace resulting from an interrupt on
          top of other interrupts, only the topmost call trace is
          printed.