Hi all,
I'm an Intel employee, having a MIPS Platform running Linux OS.
I enabled the kexec\kdump flow in Linux version we use and now I have vmcore memory dump, and now I'm getting into troubles....
I'm running the crash utility compiled with "target=MIPS" and getting the output:
crash: read error: kernel virtual address: xxxx30fc type: "possible"
WARNING: cannot read cpu_possible_map
crash: read error: kernel virtual address: xxxx30f4 type: "present"
WARNING: cannot read cpu_present_map
crash: read error: kernel virtual address: xxxx30f8 type: "online"
WARNING: cannot read cpu_online_map
crash: read error: kernel virtual address: xxxx30f0 type: "active"
WARNING: cannot read cpu_active_map
crash: read error: kernel virtual address:xxxx0a48 type: "shadow_timekeeper xtime_sec"
crash: read error: kernel virtual address: xxxxa444 type: "init_uts_ns"
crash: linux/vmlinux and vmcore do not match!
As you see the tool claims that the vmlinux doesn't match to the vmcore although the vmcore captured from the given vmlinux.
When I open the vmcore with gdb from our toolchain provided by MIPS, it's successfully opened and I see that the init_uts_ns is in offset xxxxa440 instead of xxxxa444 it looks for in the crash utility.
I thought that maybe the issue is we use a propriety toolchain provided by Codescape (the next link) and tried to replace the gdb packet in the Makefile - but then the tool wasn't
compile, it fails in the gdb_merge step:
http://codescape-mips-sdk.imgtec.com/components/toolchain/2017.10-05/downloads.html
Can you help us to understand how to overcome this issue? is there any way to replace the gdb binary that the tool uses?
We'll very appreciate your help.
