Re: issue with kgdb on ppc

["SEEMA pm" <seema.pm@gmail.com>]

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Hello

I got the gianfar.c patch and  enabled CONFIG_NETCONSOLE and now i'm able to
connect kgdb and gdb.
But when i try to cont in gdb, the system tries to load the rootfs but fails
and trys to reboot. Can someone please provide some help on this.
dump:

(gdb) c
Continuing.
RAMDISK: Compressed image found at block 0
VFS: Mounted root (ext2 filesystem).
Root-NFS: No NFS server available, giving up.
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "ram=rw" or unknown-block(2,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(2,0)
        total:    used:    free:  shared: buffers:  cached:
Mem:  1060827136 226791424 834035712        0 219955200     8192
Swap:        0        0        0
MemTotal:      1035964 kB
MemFree:        814488 kB
MemShared:           0 kB
Buffers:        214800 kB
Cached:              8 kB
SwapCached:          0 kB
Active:              0 kB
Inactive:            0 kB
HighTotal:     1035964 kB
HighFree:       814488 kB
LowTotal:            0 kB
LowFree:             0 kB
SwapTotal:        8192 kB
SwapFree:            0 kB
 [New Thread 1]

Program received signal SIGTRAP, Trace/breakpoint trap.
0x8003c0d8 in breakpoint () at kernel/kgdb.c:1773
1773            wmb();
(gdb)

Thanks

On Thu, Jun 26, 2008 at 2:53 PM, SEEMA pm <seema.pm@gmail.com> wrote:

> Hello
>
> I'm trying to get kgdb working on a mpc8540 based target machine. I took
> the latest patches which are for 2.6.13(mine is 2.6.11) and build and made
> changes to config by enabling :
> - Compile the kernel with debug info
> - KGDB: kernel debugging with remote gdb
> - KGDB: Console messages through gdb
> - Method for KGDB communication (KGDB: On ethernet - in kernel)
>
> I also added bootargs through uboot as:
> kgdboe=6443@10.110.1.2/,6442@10.110.1.31/00:0F:1F:6E:F3:30 kgdbwait
>
> Now, I'm getting the messages:
> netconsole: not configured, aborting
> kgdboe: eth0 doesn't support polling, aborting.
> kgdboe: netpoll_setup failed kgdboe failed
>
> And after some lines;
>
> kgdb: Defering I/O setup to kernel module.
> kgdb: Waiting for connection from remote gdb...
> But then it goes to load ramdisk.
>
> Can someone please provide some help on this
>
> thanks
>
>
>

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