Comment 6 for bug 2047861

Tested in dump file form in ppc64el; working.

ppc64el
-------

vm

 SERIES=noble
 ARCH=ppc64el
 DISK=${SERIES}_${ARCH}.qcow2

 wget https://cloud-images.ubuntu.com/$SERIES/current/${SERIES}-server-cloudimg-${ARCH}.img
 qemu-img create -F qcow2 -b ${SERIES}-server-cloudimg-${ARCH}.img -f qcow2 $DISK 8G

 sudo apt install -y qemu-system-ppc

 qemu-system-ppc64 \
   -machine pseries -cpu POWER10 \
 \
 -smp cpus=2 -m 2048 \
 -nodefaults -no-user-config \
 -nographic -serial stdio \
 \
 -drive file=$DISK,if=none,id=drive0 \
 -device virtio-blk,drive=drive0 \
 \
 -drive file=test-cidata.iso,media=cdrom \
 \
 -netdev user,hostfwd=::22223-:22,id=net0 \
 -device virtio-net,netdev=net0

 $ ssh ubuntu@127.0.0.1 -p 22223

 $ lsb_release -cs
 No LSB modules are available.
 noble

 $ uname -m
 ppc64le

 $ uname -rv
 6.5.0-9-generic #9-Ubuntu SMP Fri Oct 6 20:21:54 UTC 2023

kdump-tools

 sudo apt update && sudo apt install -y linux-crashdump # No, Yes
 sudo sed 's/crashkernel=[^" ]\+/crashkernel=512M/' -i /etc/default/grub.d/kdump-tools.cfg
 sudo update-grub && sudo reboot

 ...

 $ sudo dmesg | grep 'crashkernel.*RAM'
 [ 0.000000] Reserving 512MB of memory at 512MB for crashkernel (System RAM: 2048MB)

 $ sudo kdump-config status
 current state : ready to kdump

crashdump

 $ echo c | sudo tee /proc/sysrq-trigger

 $ find /var/crash
 /var/crash
 /var/crash/202401082101
 /var/crash/202401082101/dmesg.202401082101
 /var/crash/202401082101/dump.202401082101
 /var/crash/kexec_cmd
 /var/crash/kdump_lock

debug symbols

 dpkg -l | awk '$2 ~ /linux-image-[0-9.-]+-generic/ { print $2, $3}' \
   | while read pkg version; do \
       dbgpkg="${pkg}-dbgsym"; \
       arch=$(dpkg --print-architecture); \
       wget "https://launchpad.net/ubuntu/+archive/primary/+files/${dbgpkg}_${version}_${arch}.ddeb"; \
     done

 ar p linux-image-*-dbgsym_*.ddeb data.tar.xz | tar xJ --wildcards './usr/lib/debug/boot/vmlinux-*-generic'

crash

 sudo add-apt-repository -y ppa:mfo/lp2047861-noble-crash && sudo apt install -y crash

 $ dpkg -s crash | grep Version:
 Version: 8.0.4-1ubuntu1

 $ crash ./usr/lib/debug/boot/vmlinux-*-generic /var/crash/*/dump.*
 ...
       KERNEL: ./usr/lib/debug/boot/vmlinux-6.6.0-14-generic
     DUMPFILE: /var/crash/202401082101/dump.202401082101 [PARTIAL DUMP]
  CPUS: 2
  DATE: Mon Jan 8 21:00:05 UTC 2024
       UPTIME: 00:20:30
 LOAD AVERAGE: 0.12, 0.15, 0.39
        TASKS: 140
     NODENAME: test
      RELEASE: 6.6.0-14-generic
      VERSION: #14-Ubuntu SMP Thu Nov 30 10:29:25 UTC 2023
      MACHINE: ppc64le (1000 Mhz)
       MEMORY: 2 GB
        PANIC: "Kernel panic - not syncing: sysrq triggered crash"
   PID: 1174
      COMMAND: "tee"
  TASK: c000000047f89900 [THREAD_INFO: c000000047f89900]
   CPU: 1
        STATE: TASK_RUNNING (PANIC)

 crash> bt
 PID: 1174 TASK: c000000047f89900 CPU: 1 COMMAND: "tee"
  R0: c000000000305af8 R1: c000000047df7890 R2: c000000002162b00
  R3: c000000047df78a8 R4: 0000000000000000 R5: 0000000000000000
  R6: c000000047df7a58 R7: 0000000000000000 R8: 0000000000000001
  R9: c00000000ec87000 R10: 0000000000000000 R11: 0000000000000000
  R12: 0000000000000000 R13: c00000007fffee80 R14: 0000000000000000
  R15: ffffffffffffdfc4 R16: 0000182cb62e2458 R17: 0000000000000080
  R18: 0000008100000000 R19: 00007fffe1a2c5d8 R20: 00007fffe1a2c5a0
  R21: 0000000000000000 R22: 0000000000000002 R23: 0000000000000001
  R24: c000000003aa0390 R25: 0000000000000000 R26: 0000000000000004
  R27: c0000000038a4a20 R28: c000000003cbace0 R29: c000000003cbad20
  R30: c000000003d12b00 R31: 0000000000000000
  NIP: c000000000303904 MSR: 8000000000009033 OR3: 0000000000000000
  CTR: 0000000000000000 LR: c000000000305af8 XER: 0000000020040004
  CCR: 0000000024048200 MQ: 0000000000000001 DAR: 0000000000000000
  DSISR: 0000000000000000 Syscall Result: 0000000000000000
  [NIP : crash_setup_regs+84]
  [LR : __crash_kexec+152]
  #0 [c000000047df7890] crash_setup_regs at c000000000303904
 crash> quit