kgdb on EM64T
From: Wilkerson, Bryan P (Bryan.P.Wilkerson_at_intel.com)
Date: Fri, 26 Aug 2005 07:27:47 -0700 To: "George Anzinger" <firstname.lastname@example.org>, "Tom Rini" <email@example.com>
Thanks you Tom and George for the tips on using kgdb with
I almost have it working but kgdb seems to have a few issues. I can get
it running from the dev machine using the kgdb and console=kgdb boot
options on the test kernel. The kernel waits as it should and when I
attach with "target remote /dev/ttyS0" and I can continue the boot but
eventually it gets to a point in the boot where it frees unused kernel
memory successfully and then a warning, "unable to open an initial
console", followed by, "Kernel panic - not syncing: Attempted to kill
Removing the console=kgdb boot option and the machine boots all the way
to run level 5. I tried to break into kgdb at this point using the
$echo -e "\003" > /dev/ttyS0
from the dev machine but the test kernel panics at gdb_interrupt+75 when
it receives anything on the serial port. Hmmm...
I'm wondering if I'm maybe just the first to try this on EM64T (kernel
builds in the arch/x86_64 tree).
Any suggestions welcome.
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