On Sun, Oct 22, 2006 at 03:11:16PM +0200, Juergen Hannken-Illjes wrote:
> On Sun, Oct 22, 2006 at 02:31:14PM +0200, Nicolas Joly wrote:
> > 
> > I just got a kernel panic on my -current NetBSD/i386 machine at
> > home ... I mode a crash dump to be analysed a little later, but i
> > discovered that gdb6 does not handle kcore target anymore.
[...]
> > Did the kernel core analysis method changed between gdb5 and gdb6 ?
> 
> target kvm netbsd.0.core

Thanks, i can now load the kern dump ...

Unfortunately, this doesn't seems to work right.

root@cixy [/var/crash]# gdb ./netbsd.0
GNU gdb 6.5
Copyright (C) 2006 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 "i386--netbsdelf"...(no debugging symbols found)

(gdb) target kvm netbsd.0.core
#0  0x00000001 in ?? ()
(gdb) bt
#0  0x00000001 in ?? ()
#1  0x130bc000 in ?? ()
#2  0x00000015 in ?? ()
#3  0x0000000d in ?? ()
#4  0x04e34000 in ?? ()
#5  0x17ef0000 in ?? ()
#6  0x130bc000 in ?? ()
#7  0x00000001 in ?? ()
#8  0x007d8e40 in ?? ()
#9  0x00000000 in ?? ()

In the mean time, i found an old gdb5 lying around ... and it works a
lot better.

root@cixy [/var/crash]# gdb5 netbsd.0
GNU gdb 5.3nb1
Copyright 2002 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 "i386--netbsdelf"...(no debugging symbols found)...
(gdb) target kcore netbsd.0.core
#0  0x130bc000 in ?? ()
(gdb) bt
#0  0x130bc000 in ?? ()
#1  0xc04619f1 in cpu_reboot ()
#2  0xc01a56d1 in db_reboot_cmd ()
#3  0xc01a5346 in db_command ()
#4  0xc01a561f in db_command_loop ()
#5  0xc01a7fe6 in db_trap ()
#6  0xc045e404 in kdb_trap ()
#7  0xc046c00b in trap ()
#8  0xc0102ecb in calltrap ()
#9  0xc0307b93 in procfs_rw ()
#10 0xc0413bb3 in VOP_READ ()
#11 0xc0411dea in vn_read ()
#12 0xc03e9f16 in dofileread ()
#13 0xc03ea022 in sys_read ()
#14 0xc046b83d in syscall_plain ()

-- 
Nicolas Joly

Biological Software and Databanks.
Institut Pasteur, Paris.