On Fri, Sep 30, 2011 at 10:49:20AM +0200, Jan Kiszka wrote: > On 2011-09-30 09:42, Richard W.M. Jones wrote: > > > > I've finally managed to reproduce a very infrequent kernel boot hang > > by forcing TCG (so it runs slower, bug seems to be timing sensitive) > > and running a boot test in a loop thousands of times. > > > > I'd like to find out where in the guest kernel this is looping. > > > > Unfortunately I don't have access to the monitor so "info registers" > > won't work, but I can attach to the qemu process with gdb. > > > > Which TCG struct contains %rip, other registers? What other useful > > information can be captured using only gdb? > > Print first_cpu->eip, maybe also first_cpu->segs[1] to dump the CS > segment cache (relevant while in real mode).
Perfect thanks! *first_cpu contains a wealth of info. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones New in Fedora 11: Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 70 libraries supprt'd http://fedoraproject.org/wiki/MinGW http://www.annexia.org/fedora_mingw