Hello, I'm trying to open a kdump crash dump using the 'crash' tool but I think I need a version of vmlinux with debug info included in order to do this. It sounds like this isn't published so I believe I need to recompile the same kernel version to get a version that includes the debug info.
I'm currently running kernel 5.4.114-1-pve so I've cloned the pve-kernel git repo and checked out the commit ee60bb7ce033f8d44e29ac1f1ec50dee836c6742 for "update ABI file for 5.4.114-1-pve" under the pve-kernel-5.4 branch. With this, I'm able to run 'make' and successfully recompile the kernel and produce 'pve-kernel-5.4.114-1-pve_5.4.114-1_amd64.deb'. root@hostname:~/pve-kernel# file build/debian/pve-kernel-5.4.114-1-pve/boot/vmlinuz-5.4.114-1-pve build/debian/pve-kernel-5.4.114-1-pve/boot/vmlinuz-5.4.114-1-pve: Linux kernel x86 boot executable bzImage, version 5.4.114-1-pve (root@hostname) #1 SMP PVE 5.4.114-1 (Sun, 09 May 2021 17:13:05 +0200), RO-rootFS, swap_dev 0xB, Normal VGA root@hostname:~/pve-kernel# uname -a Linux hostname 5.4.114-1-pve #1 SMP PVE 5.4.114-1 (Sun, 09 May 2021 17:13:05 +0200) x86_64 GNU/Linux My issue is, when I attempt to run crash using the compiled vmlinux file, I receive the following: root@hostname:~/pve-kernel# crash ~/pve-kernel/build/ubuntu-focal/vmlinux /var/crash/202106021922/dump.202106021922 crash 7.2.5 Copyright (C) 2002-2019 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 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, 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. GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html > This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... WARNING: kernel relocated [840MB]: patching 114251 gdb minimal_symbol values WARNING: kernel version inconsistency between vmlinux and dumpfile crash: seek error: kernel virtual address: ffff905a5f606024 type: "tss_struct ist array" Lots of questions that probably all have the same answer: - What am I missing here? - Should I not use the compiled vmlinux file at ./build/ubuntu-focal/vmlinux? - Is there a flag I need to change or add somewhere to properly compile a version of the kernel I can use with crash? - Is there a difference between the vmlinux file in the build/ubuntu-focal directory vs what I could extract from the vmlinuz file in the build/debian directory? The latter had the debug info stripped when I extracted it. Thanks in advance, Nathan _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
