On Wed, Feb 29, 2012 at 11:22:34AM +0900, Daniel Castro wrote:
As part of the xen code for PV-Drivers in Seabios I am trying to boot from a PV drive. The two ends are connected, and it should be working, but when I try to boot from the harddrive it fails. Inside the code I treat the cdrom as a drive, except I register it in seabios with the cdrom function, but also it fails to boot from cdrom with Error 003. This could mean that maybe I am adding the drives incorrectly, or that my read/write opertaion is wrong.
Since the operation runs in 16bit how can I debug it to see what is being done?
I usually debug by adding dprintf statements. When that's too painful, I connect gdb to qemu and set break points - the steps for using gdb are in the README file. I don't know if there is a similar way to connect gdb to a xen session.