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 process 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 suspended and serving a textual debugging protocol over their serial lines. (see cons(3))

Because the debugging protocol is textual, a console provided by consolefs(4) may be substituted for the serial device.


acid(1), db(1), cons(3), consolefs(4)