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From: "simark at simark dot ca" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when
 debugging the linux kernel with qemu
Date: Sat, 14 Nov 2020 17:23:34 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26876

--- Comment #5 from Simon Marchi <simark at simark dot ca> ---
Strange, I can't reproduce using that technique.  It just says "loading
vmlinux" and  goes back to the prompt.

When I use the guest OK, it either finds some modules:

loading vmlinux=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
scanning for modules in /home/smarchi/src/linux=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
loading @0xffffffffc0119000: /home/smarchi/src/linux/arch/x86/kvm/kvm-amd.k=
o=20=20=20=20
loading @0xffffffffc0103000: /home/smarchi/src/linux/drivers/crypto/ccp/ccp=
.ko=20=20
loading @0xffffffffc00fe000: /home/smarchi/src/linux/crypto/sha1_generic.ko=
=20=20=20=20=20
loading @0xffffffffc004d000: /home/smarchi/src/linux/arch/x86/kvm/kvm.ko=20=
=20=20=20=20=20=20=20
loading @0xffffffffc0041000: /home/smarchi/src/linux/virt/lib/irqbypass.ko=
=20=20=20=20=20=20
loading @0xffffffffc003a000:
/home/smarchi/src/linux/drivers/virtio/virtio_balloon.ko=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
loading @0xffffffffc002d000:
/home/smarchi/src/linux/drivers/char/virtio_console.ko=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
loading @0xffffffffc0027000:
/home/smarchi/src/linux/drivers/block/virtio_blk.ko=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
loading @0xffffffffc0019000: /home/smarchi/src/linux/drivers/net/virtio_net=
.ko=20=20
loading @0xffffffffc0014000:
/home/smarchi/src/linux/drivers/net/net_failover.ko=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
loading @0xffffffffc0048000: /home/smarchi/src/linux/net/core/failover.ko=
=20=20=20=20=20=20=20
loading @0xffffffffc000c000:
/home/smarchi/src/linux/drivers/virtio/virtio_pci.ko=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
loading @0xffffffffc0005000:
/home/smarchi/src/linux/drivers/virtio/virtio_ring.ko=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
loading @0xffffffffc0000000: /home/smarchi/src/linux/drivers/virtio/virtio.=
ko=20=20=20

or crashes.

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