Jason Wessel wrote:
> Jay Lan wrote:
>>>
>> Hi Jason,
>>
>> Please disregard the above comment. The kernel was hung in running init,
>> not during booting the kernel. I need to find what caused this problem
>> in this particular system setup.
>>
>> Now, i put in kgdbwait in the boot command line and the kernel stopped
>> and wait for gdb to connect. The documentation says to use the following
>> for connecting a terminal server:
>> (gdb) target remote udp:192.168.2.2:6443
>>
>> I replaced the ip with the ip of my terminal server, and the port number
>> with the port number when i connect to the console of the target system.
>>
>> Still no connection! Does the system i run gdb on have to be on the same
>> subnet as the target system? Hmm, i will find another system to test
>> tomorrow...
>>
>>
>
> Not real sure where you got the target remote "udp" but most if not all
> terminal servers use tcp. What ever address and port you connect to
> with your terminal program is the same as what you would use for the gdb
> target remote command.
Hi Jason, it is from around line 406 of Documentation/DocBook/kgdb.tmpl.
Example (kgdb to a terminal server):
</para>
<programlisting>
% gdb ./vmlinux
(gdb) target remote udp:192.168.2.2:6443
</programlisting>
<para>
Attached is a patch that remove "udp:" from the example.
However, after removing "udp:" my connection failed in a different
way:
(gdb) target remote 128.162.244.107:7003
Remote debugging using 128.162.244.107:7003
warning: unrecognized item "qSupported" in "qSupported" response
Malformed response to offset query, qOffsets
(gdb)
Has anyone seen this problem before? The kernel was 2.6.26-rc2 and
kgdb source was from kgdb-next about 3 weeks ago.
I used kgdboc at the boot line. When i tried to use kgdb8250, as
suggested by xianfeng, the boot stopped at loading initrd. Any extra
module i need to provide mkinitrd? I had CONFIG_KGDB_8250=y. (BTW,
thanks xianfeng, for your example!)
I just did a 'git remote update' and will build a newer version and
try again.
Thanks,
- jay
---
Documentation/DocBook/kgdb.tmpl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux/Documentation/DocBook/kgdb.tmpl
===================================================================
--- linux.orig/Documentation/DocBook/kgdb.tmpl
+++ linux/Documentation/DocBook/kgdb.tmpl
@@ -403,7 +403,7 @@
</para>
<programlisting>
% gdb ./vmlinux
- (gdb) target remote udp:192.168.2.2:6443
+ (gdb) target remote 192.168.2.2:6443
</programlisting>
<para>
Example (kgdb over ethernet):
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