From 4aad8f51d0672f1c95e2cf0e1bc7b9ab42d8e1ea Mon Sep 17 00:00:00 2001 From: Jason Wessel Date: Mon, 25 Oct 2010 10:14:05 -0500 Subject: kdb: Add kdb kernel module sample Add an example of how to add a dynamic kdb shell command via a kernel module. Signed-off-by: Jason Wessel --- Documentation/DocBook/kgdb.tmpl | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'Documentation/DocBook/kgdb.tmpl') diff --git a/Documentation/DocBook/kgdb.tmpl b/Documentation/DocBook/kgdb.tmpl index 490d862c5f0..d71b57fcf11 100644 --- a/Documentation/DocBook/kgdb.tmpl +++ b/Documentation/DocBook/kgdb.tmpl @@ -710,7 +710,18 @@ Task Addr Pid Parent [*] cpu State Thread Command A simple shell The kdb core command set A registration API to register additional kdb shell commands. - A good example of a self-contained kdb module is the "ftdump" command for dumping the ftrace buffer. See: kernel/trace/trace_kdb.c + + A good example of a self-contained kdb module + is the "ftdump" command for dumping the ftrace buffer. See: + kernel/trace/trace_kdb.c + For an example of how to dynamically register + a new kdb command you can build the kdb_hello.ko kernel module + from samples/kdb/kdb_hello.c. To build this example you can + set CONFIG_SAMPLES=y and CONFIG_SAMPLE_KDB=m in your kernel + config. Later run "modprobe kdb_hello" and the next time you + enter the kdb shell, you can run the "hello" + command. + The implementation for kdb_printf() which emits messages directly to I/O drivers, bypassing the kernel log. -- cgit v1.2.3-70-g09d2