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Does sparse_dump work on amd64?
My amd64 machine crashed (twice) yesterday while I was out, and it seems
to have not completely dumped everything into /var/crash
-rw------- 1 root wheel 588450 Apr 28 01:10 netbsd.3
-rw------- 1 root wheel 1158063640 Apr 28 01:10 netbsd.3.core
-rw------- 1 root wheel 0 Jun 28 09:16 netbsd.4
-rw------- 1 root wheel 5618551832 Jun 28 09:16 netbsd.4.core
The kernel images are obviously not valid, given that my real kernel is
10 times larger than netbsd.3 ...
-rwxrwxr-x 1 root wheel 5475042 Feb 22 13:36 /netbsd
-rwxr-xr-x 1 root wheel 29566097 Feb 22 13:36 /netbsd.gdb
Anyway, when I look at the core files with gdb, the netbsd.4.core file
seems to be invalid:
(gdb) target kvm netbsd.4.core
Cannot access memory at address 0x68d775f0
(gdb) bt
#0 <unavailable> in ?? ()
Backtrace stopped: Not enough registers or memory available to unwind
further
(gdb)
FWIW, the netbsd.3.core dump does seem to have valid info. But I don't
have a clue why the machine would have tried to trap:
(gdb) target kvm netbsd.3.core
#0 0xffffffff8021d91e in ?? ()
(gdb) file /netbsd.gdb
Reading symbols from /netbsd.gdb...done.
(gdb) bt
#0 0xffffffff8021d91e in cpu_reboot (howto=260, bootstr=<optimized out>)
at /build/netbsd-local/src/sys/arch/amd64/amd64/machdep.c:779
#1 0xffffffff802ce686 in vpanic (fmt=0xffffffff80408e9c "trap",
ap=0xfffffe813b5d0240) at /build/netbsd-local/src/sys/kern/subr_prf.c:284
#2 0xffffffff802ce73a in panic (fmt=<unavailable>)
at /build/netbsd-local/src/sys/kern/subr_prf.c:200
#3 0xffffffff8030012d in trap (frame=0xfffffe813b5d0380)
at /build/netbsd-local/src/sys/arch/amd64/amd64/trap.c:294
#4 0xffffffff80100f66 in calltrap ()
#5 0xffff80003f7a1000 in ?? ()
#6 0xffff80003f7a3030 in ?? ()
#7 0x00000000000003c0 in ?? ()
#8 0x0000000000000000 in ?? ()
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| Paul Goyette | PGP Key fingerprint: | E-mail addresses: |
| Customer Service | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com |
| Network Engineer | 0786 F758 55DE 53BA 7731 | pgoyette at juniper.net |
| Kernel Developer | | pgoyette at netbsd.org |
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