RDBFS(4) RDBFS(4)
NAME
rdbfs - remote kernel debugging file system
SYNOPSIS
rdbfs [ -d ] [ -p pid ] [ -t text ] [ device ]
DESCRIPTION
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).
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
device.
SOURCE
/sys/src/cmd/rdbfs.c
/sys/src/9/port/rdb.c
SEE ALSO
acid(1), db(1), consolefs(4)
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