[Xen-devel] HVM guest debugging

["Guy Zana" <guy@xxxxxxxxxxxx>]

In vmx.c, in the vmexit handler (reason = EXIT_REASON_EXCEPTION_NMI)

I found this code:

 

        switch ( vector )
        {

        case TRAP_debug:

        case TRAP_int3:
            if ( !v->domain->debugger_attached )
                goto exit_and_crash;
            domain_pause_for_debugger();

 

Now, I don't understand who updates debugger_attached for a HVM guest.

(I worked with windbg in order to debug a windows HVM, and I guess EXIT_REASON_EXCEPTION_NMI is the exit reason for breakpoints I placed)

 

Can anyone clear this for me?

 

Thanks,

Guy.

 

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