set $stacktrace_full=1
define stacktrace
  set $n_esp=$arg0
  set $n_words=$arg1
  set $n_end = $n_esp + $n_words
  while $n_esp < $n_end
     set $n_value = *(uint32 *)$n_esp
     if (&_start <= $n_value) && ($n_value <= &_etext)
        printf "%#8x: ", $n_esp
        output/a $n_value
        printf "\n"
     else
        if $stacktrace_full
           printf "%#8x: %#-10x\n", $n_esp, $n_value
        end
     end
     set $n_esp = $n_esp + 1
  end
end

document stacktrace
stacktrace start-esp number-of-words

Dumps a number of words in memory as a stack trace.  If the data at a
memory location is from the text section, a symbolic name will be
printed.  If the data is not from the text segment, hexadecimal data
will be output.

set $stacktrace_full=0 to only output symbolic names, thus effectively
skipping raw data.
end