Re: [Crash-utility] [ [PATCH]] arm64: Fix for st->_stext_vmlinux not initialized when set VA_BITS_ACTUAL

Hi,all Here's some explanation for this patch Without patch: Consider the following scenario ->arm64_init(PRE_GDB) case PRE_GDB: ... 292 } else if (ms->VA_BITS_ACTUAL) { 293 ms->modules_vaddr = (st->_stext_vmlinux & TEXT_OFFSET_MASK) - ARM64_MODULES_VSIZE;-->//ms->modules_vaddr=0xfffffffff8000000 294 ms->modules_end = ms->modules_vaddr + ARM64_MODULES_VSIZE -1;--->//ms->modules_end=0xffffffffffffffff 295 ms->vmalloc_start_addr = ms->modules_end + 1;--->//ms->vmalloc_start_addr=0 296 } else { .... } arm64_calc_kimage_voffset(); ..... Since arm64_calc_kimage_voffset() depends on vmalloc_start_addr, kimage_voffset cannot be calculated correctly. st->_stext_vmlinux can be initialized in numeric_forward(),just set st->_stext_vmlinux to UNINITIALIZED. ============ log as below: $ ~/crash/crash/crash vmlinux DDRCS0.bin@0x80000000 --machdep vabits_actual=48 crash 8.0.1++ 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. NOTE: setting vabits_actual to: 48 WARNING: kimage_voffset cannot be determined from the dumpfile. Try using the command line option: --machdep kimage_voffset=<addr> GNU gdb (GDB) 10.2 Copyright (C) 2021 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 "--host=x86_64-pc-linux-gnu --target=aarch64-elf-linux". Type "show configuration" for configuration details. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>;. For help, type "help". Type "apropos word" to search for commands related to "word"... crash: read error: kernel virtual address: ffff80001083d4a0 type: "kernel_config_data" WARNING: cannot read kernel_config_data crash: read error: kernel virtual address: ffff80001170e798 type: "possible" WARNING: cannot read cpu_possible_map crash: read error: kernel virtual address: ffff80001170e7a8 type: "present" WARNING: cannot read cpu_present_map crash: read error: kernel virtual address: ffff80001170e788 type: "online" WARNING: cannot read cpu_online_map crash: read error: kernel virtual address: ffff80001170e7c0 type: "active" WARNING: cannot read cpu_active_map crash: read error: kernel virtual address: ffff8000122e00f0 type: "shadow_timekeeper xtime_sec" crash: read error: kernel virtual address: ffff80001171dc04 type: "init_uts_ns" crash: vmlinux and /var/tmp/ramdump_elf_m2ivkg do not match! Usage: crash [OPTION]... NAMELIST MEMORY-IMAGE[@ADDRESS] (dumpfile form) crash [OPTION]... [NAMELIST] (live system form) Enter "crash -h" for details. Qianli Zhao <zhaoqianligood(a)gmail.com&gt; 于2022年6月24日周五 00:14写道：