CRASH(8) System Manager's Manual CRASH(8) (NAME) crash - (crash dump) (SYNOPSIS) crash []... NAMELIST MEMORY-IMAGE[@ADDRESS] ( ) crash []... [NAMELIST] ( ) (DESCRIPTION) Crash (kernel crash) (core dump) netdump diskdump LKCD kdump xendump kvmdump VMware . crash SVR4 UNIX gdb(1) . crash gdb(1) . NAMELIST MEMORY-IMAGE . vmlinux /usr/lib/debug/lib/modules/ NAMELIST . crash Xen . NAMELIST xen-syms . Xen . crash (backtrace) . gdb gdb . $HOME/.crashrc / .crashrc . $HOME/.crashrc ./.crashrc . crash . crash . (OPTIONS) NAMELIST ( vmlinux) Xen ( xen-syms) <<-g>> . vmlinux gzip bzip2 . MEMORY-IMAGE[@ADDRESS] core dump netdump diskdump LKCD kdump xendump kvmdump VMware . MEMORY-IMAGE RAM (root) . /dev/crash . /dev/mem CONFIG_STRICT_DEVMEM /proc/kcore . /dev/crash /dev/mem /proc/kcore . RAM @ADDRESS MEMORY-IMAGE . MEMORY-IMAGE@ADDRESS RAM ADDRESS () . () ELF /var/tmp crash . RAM ( mem-path memory-backend-file QEMU ) <<:live>> MEMORY-IMAGE . VMware crash VMware (suspend) core dump . .vmss .guest MEMORY-IMAGE .vmem . mapfile NAMELIST ( ) ( ) System.map . -h [] --help [] crash . crash . "input" crash . "output" . "all" . crash . -s GPL crash <<> (scroller) . -i file () file <<> . -d num . crash . -S /boot/System.map mapfile. -e vi | emacs readline(3) "vi" "emacs" . "vi" . -f vmlinux "vmlinux" . -k NAMELIST LKCD "Kerntypes" . -g [namelist] namelist vmlinux xen-syms . -t (timestamp) . -L mlockall(MCL_CURRENT|MCL_FUTURE) . . -c tty-device tty-device . -p page-size page-size . -o filename MEMORY-IMAGE@ADDRESS RAM vmcore ELF . vmcore RAM . -m = --machdep = (machine-dependent) . / : X86_64: phys_base= irq_eframe_link= irq_stack_gap= max_physmem_bits= kernel_image_size= vm=orig ( 2.6.11) vm=2.6.11 ( 2.6.11 ) vm=xen ( Xen) vm=xen-rhel4 ( Xen RHEL4) vm=5level ( ) page_offset= PPC64: vm=orig vm=2.6.14 ( ) IA64: phys_start= init_stack_size= vm=4l ( ) ARM: phys_base= ARM64: phys_offset= kimage_voffset= max_physmem_bits= vabits_actual= X86: page_offset= -x (extension modules) . CRASH_EXTENSIONS . /usr/lib64/crash/extensions ( ) /usr/lib/crash/extensions ( ) ./extensions . --active CPU . --buildinfo crash (UID) . --memory_module modname modname crash.ko /dev/crash . --memory_device device device /dev/crash /dev/mem /proc/kcore . --log dumpfile . namelist VMCOREINFO /proc/vmcore ELF . : . . --no_kallsyms kallsyms . --no_modules . --no_ikconf CONFIG_IKCONFIG . --no_data_debug . --no_kmem_cache (slab cache) kmem_cache . --no_elf_notes (backtrace) (registers) ELF NT_PRSTATUS kdump . --kmem_cache_delay . --readnow gdb NAMELIST . --smp SMP . -v --version crash gdb GPL . --cpus number CPU ( number) SMP . --osrelease dumpfile OSRELEASE vmcoreinfo dumpfile kdump . --build-id dumpfile BUILD-ID vmcoreinfo dumpfile kdump . : . "unknown" . --hyper Xen . --p2m_mfn pfn Xen dom0 Xen dom0 . domU pfn pfn_to_mfn_list_list NAMELIST . --xen_phys_start physical-address (text) Xen xendump . --zero_excluded makedumpfile(8) kdump ELF kdump ENOSPC . . --no_panic . "swapper" . --more /bin/more /usr/bin/less ./.crashrc $HOME/.crashrc . --less /usr/bin/less ./.crashrc $HOME/.crashrc . --hex () ./.crashrc $HOME/.crashrc . --dec () ./.crashrc $HOME/.crashrc . . --CRASHPAGER CRASHPAGER ./.crashrc $HOME/.crashrc . --no_scroll . --no_strip (cloned) . --no_crashrc $HOME/.crashrc ./.crashrc . --mod directory debuginfo mod -S directory . --src directory debuginfo . --kaslr offset|auto x86 x86_64 s390x loongarch64 CONFIG_RANDOMIZE_BASE offset vmlinux (relocated) KASLR . auto KASLR . --reloc size x86 CONFIG_PHYSICAL_START CONFIG_PHYSICAL_ALIGN (relocation size) . --hash count (hash queue heads) . . --max-malloc-bufs size MAX_MALLOC_BUFS size . . --minimal log dis rd sym eval set exit . / crash . --kvmhost [32|64] KVM x86 KVM x86 ( ) x86_64 ( ) . --kvmio I/O KVM . --offline [show|hide] CPU . show . (COMMANDS) crash : (Symbolic display) / gdb . (System state) crash << >> . (Utility functions) . (Session control) crash . crash . crash -h crash help command . * << >> (pointer to) struct union . . alias . ascii . bpf eBPF . bt (backtrace) . -a CPU . foreach . btop ( ) . dev I/O I/O PCI . dis . eval . exit crash . extend (shared object) crash . files (context) . foreach ( ) . fuser . gdb gdb . gdb crash . help . . ipcs IPC System V . irq (IRQ) (bottom-half) . kmem . list . log log_buf . mach . mod . mount (mounted) . net . p "print" gdb . ps . pte (PTE) . ptob . ptov . q "exit" . rd . repeat . runq (run queue) . sbitmapq sbitmap_queue . sbitmap_queue . search . set . sig . struct . swap (swap) . sym ( ) . sys . task task_struct . tree - (red-black tree) (radix tree) . timer . union struct . vm . vtop . waitq . whatis typedef / . wr . /dev/mem RAM . crash Xen NAMELIST . * alias ascii bt dis eval exit extend gdb help list log p pte rd repeat search set struct sym sys union whatis wr q . Xen : domain . doms . dumpinfo Xen CPU CPU . pcpus CPU CPU CPU . vcpus vcpu vcpu vcpu . (FILES) .crashrc . HOME / . .crashrc HOME .crashrc . (ENVIRONMENT) EDITOR readline(3) . EDITOR emacs vi . EDITOR vi . set vi set emacs .crashrc -e emacs crash . CRASHPAGER CRASHPAGER . /usr/bin/less -E -X . CRASH_MODULE_PATH . CRASH_EXTENSIONS -x . (NOTES) crash : crash . set scroll off . crash emacs . (AUTHOR) (Dave Anderson ) crash . (Jay Fenlason ) (Dave Anderson ) . (SEE ALSO) help crash . https://github.com/crash-utility - crash. netdump(8), gdb(1), makedumpfile(8) CRASH(8)