[Bug 228006] kgdb crashing with dumptid = 0

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Sun May 20 14:43:29 UTC 2018


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228006

--- Comment #3 from Eitan Adler <eadler at FreeBSD.org> ---
base gdb shows:

∴/usr/libexec/kgdb kernel/kernel vmcore.5
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB 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.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "amd64-marcel-freebsd".../home/eax/.gdbinit:4: Error
in sourced command file:
No symbol table is loaded.  Use the "file" command.
BFD: /home/eax/crashes/shutdown-crash-3/kernel/kernel: invalid relocation type
37
BFD: BFD 2.17.50 [FreeBSD] 2007-07-03 assertion fail
/usr/src/gnu/usr.bin/binutils/libbfd/../../../../contrib/binutils/bfd/elf64-x86-64.c:276
BFD: /home/eax/crashes/shutdown-crash-3/kernel/kernel: invalid relocation type
37
BFD: BFD 2.17.50 [FreeBSD] 2007-07-03 assertion fail
/usr/src/gnu/usr.bin/binutils/libbfd/../../../../contrib/binutils/bfd/elf64-x86-64.c:276

Cannot access memory at address 0x0
(kgdb) file kernel/kernel.debug
Load new symbol table from "kernel/kernel.debug"? (y or n) y
Reading symbols from kernel/kernel.debug...done.
(kgdb) bt
#0  0x0000000000000000 in ?? ()
Cannot access memory at address 0x0

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