Re: [Xen-devel] [PATCH 2/2] Add xen-hyp-rw

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 18/06/15 16:55, Don Slutz wrote:
> This allows reading and writing of variables in the hypervisor.
>
> for example (read case -- default 4 bytes):
>
>   xen-hyp-rw /boot/System.map-xen* opt_hvm_debug_level
>   opt_hvm_debug_level @ 0xffff82d080285610 is 0x0(0)
>
> Write case:
>
>   xen-hyp-rw /boot/System.map-xen* opt_hvm_debug_level 4 -1
>   opt_hvm_debug_level @ 0xffff82d080285610 is 0x0(0)
>   opt_hvm_debug_level @ 0xffff82d080285610 set to 0xffffffff(4294967295)
>
> Signed-off-by: Don Slutz <dslutz@xxxxxxxxxxx>
> CC: Don Slutz <don.slutz@xxxxxxxxx>

As a crazy thought...

Would it not be easier to modify gdbsx to allow gdb to connect remotely
to the hypervisor context?

That way, any gdb-like tools could consume an appropriate xen-syms and
make changes like this.

~Andrew

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