RDBFS(4)                                                 RDBFS(4)

          rdbfs - remote kernel debugging file system

          rdbfs [ -d ] [ -p pid ] [ -s srvname ] [ -t text ] [ device

          Rdbfs presents in /proc/pid (default /proc/1) a set of pro-
          cess files for debugging a kernel over the serial line
          device (default /dev/eia0).  If the -s option is given,
          rdbfs will post its channel in /srv/srvname (see srv(3)),
          allowing the session to be shared or reattached later.

          The text file presented is just a copy of text (default
          /386/9pc).  It can usually be ignored, since the debuggers
          open kernel files directly rather than using /proc/n/text.

          Kernels can be remotely debugged  only when they are sus-
          pended and serving a textual debugging protocol over their
          serial lines.  Typing ``^t^td'' (control-t, control-t, d) at
          the console will cause the kernel to enter this mode when it
          `panics'.  Typing ``^t^tD'' causes the kernel to enter this
          mode immediately.

          Because the debugging protocol is textual, a console pro-
          vided by consolefs(4) may be substituted for the serial


          acid(1), db(1), consolefs(4)