[Crash-utility] [PATCH 0/4] Add support to extract hardware device dumps from vmcore

When kernel panic happens and kdump crash kernel is loaded, device drivers enabled in the kdump crash kernel collect device specific snapshot of the hardware/firmware state of their underlying devices. These snapshots are exported as ELF notes with note type NT_VMCOREDD (i.e., 0x700) in vmcore [1]. This series of patches enhance crash utility to analyze and extract these hardware specific device dumps from vmcore using "dev" command. Patches 1 and 2 enhance help -D to parse NT_VMCOREDD ELF notes in ELF vmcore and KDUMP vmcore, respectively. Patches 3 and 4 enhance dev command to analyze and extract hardware specific device dumps from ELF vmcore and KDUMP vmcore, respectively. Suggestions and feedback will be much appreciated. Thanks, Surendra [1] https://lkml.org/lkml/2018/5/2/190 --- rfc: - Moved logic to extract device dumps from "devdump" to "dev" command, in patches 3 and 4. - By default, device dumps are output to screen as hexdump, if output file is not provided. Surendra Mobiya (4): parse NT_VMCOREDD ELF notes in ELF vmcore parse NT_VMCOREDD ELF notes in KDUMP vmcore enhance dev command to extract NT_VMCOREDD from ELF vmcore enhance dev command to extract NT_VMCOREDD from KDUMP vmcore defs.h | 10 +++++ dev.c | 80 +++++++++++++++++++++++++++++++++++- diskdump.c | 84 ++++++++++++++++++++++++++++++++++++++ help.c | 23 ++++++++++- memory.c | 10 +++++ netdump.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++- netdump.h | 3 ++ vmcore.h | 36 ++++++++++++++++ 8 files changed, 359 insertions(+), 5 deletions(-) create mode 100644 vmcore.h -- 2.21.0