Dear Mantainers,
I meet a problem that the latest crash tool built for ARM64 cannot load the vmcore genarated by Qemu ARM64 guest OS.
1) The vmcore captured by "dump-guest-memory" cmd in qemu monitor mode:
(qemu) dump-guest-memory vmcore
$ file vmcore
vmcore: ELF 64-bit LSB core file, ARM aarch64, version 1 (SYSV), SVR4-style
My host OS installed qemu-system-aarch64 version is 6.2.0
$ qemu-system-aarch64 --version
QEMU emulator version 6.2.0
2) The test for linux version both 5.0 and 5.15 which disable kaslr is NG, but test linux version 4.0 loading vmcore is OK.
Here's the error log while crash tool loading linux-5.15 vmcore:
$ crash64 vmlinux vmcore
crash64 8.0.3++
Copyright (C) 2002-2022 Red Hat, Inc.
Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
Copyright (C) 1999-2006 Hewlett-Packard Co
Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
Copyright (C) 2005, 2011, 2020-2022 NEC Corporation
Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
Copyright (C) 2015, 2021 VMware, Inc.
This program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. Enter "help copying" to see the conditions.
This program has absolutely no warranty. Enter "help warranty" for details.
crash64: cannot determine VA_BITS_ACTUAL
3) It seems crash tool cannot get vabits_actual from vmcore, so I append "vabits_actual=48" to crash cmd:
$ crash-arm64 vmlinux vmcore -m vabits_actual=48
The result shows some symbols seek error:
crash-arm64: seek error: kernel virtual address: ffff800011769918 type: "possible"
WARNING: cannot read cpu_possible_map
crash-arm64: seek error: kernel virtual address: ffff800011769958 type: "present"
WARNING: cannot read cpu_present_map
crash-arm64: seek error: kernel virtual address: ffff800011769938 type: "online"
WARNING: cannot read cpu_online_map
crash-arm64: seek error: kernel virtual address: ffff800011769978 type: "active"
WARNING: cannot read cpu_active_map
crash-arm64: seek error: kernel virtual address: ffff800011936390 type: "shadow_timekeeper xtime_sec"
xtime timespec.tv_sec: 55fcd060743a: Thu Feb 11 04:14:50 CST 2997960
crash-arm64: seek error: kernel virtual address: ffff800011771268 type: "init_uts_ns"
The attachment is the detailed log which append "-d 1" to crash cmd.
Could you please help this?
Thanks
Attachment:
crash_error.log
Description: Binary data
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