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Re: [Xen-devel] Re: [PATCH] Xen Guest Kexec

On 7 Mar 2006, at 13:06, Gerd Hoffmann wrote:

Actually a clear-trap-table call is quite easy to add: I checked in a
patch that will clear the entire trap table if you pass a NULL pointer
to the set_trap_table hypercall. With that patch in place, if you take a
fault you will get a register dump in Xen as desired.

Well, I've tried that now, and got this:

(XEN) domain_crash_sync called from entry.S (ff147f35)
(XEN) Domain 1 (vcpu#0) crashed on cpu#1:
(XEN) Assertion '(diff != 0) || VM86_MODE(regs) || !RING_0(regs) ||
HVM_DOMAIN(current)' failed, line 35, file x86_32/traps.c
(XEN) BUG at x86_32/traps.c:35

The assertion is spurious. I've tightened up the assertion condition in changeset 9157:51c59d5d7... "Tighten up the assertion conditions in the GUEST_MODE() macro.".

 -- Keir

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