[Crash-utility] unwind not working on x86?
Hello
I am trying to use both the unwind function on x86 in crash, and the fp
extension. Both are not working for me.
I did the following tests: (crash 7.0.9)
crash/crash vmcore.201412161409 linux-3.2.64/vmlinux
GNU gdb (GDB) 7.6
KERNEL: linux-3.2.64/vmlinux
DUMPFILE: vmcore.201412161409
CPUS: 1
DATE: Tue Dec 16 15:09:46 2014
UPTIME: 00:00:46
LOAD AVERAGE: 0.05, 0.01, 0.01
TASKS: 55
NODENAME: debian
RELEASE: 3.2.64
VERSION: #2 SMP Tue Dec 16 15:08:10 CET 2014
MACHINE: x86_64 (2392 Mhz)
MEMORY: 383.5 MB
PANIC: "[ 46.736164] Oops: 0002 [#1] SMP " (check log for details)
PID: 1962
COMMAND: "tee"
TASK: ffff88000e5e0000 [THREAD_INFO: ffff88000c8e8000]
CPU: 0
STATE: TASK_RUNNING (PANIC)
crash> bt
PID: 1962 TASK: ffff88000e5e0000 CPU: 0 COMMAND: "tee"
#0 [ffff88000c8e99f0] machine_kexec at ffffffff81038e0a
#1 [ffff88000c8e9a60] crash_kexec at ffffffff810b3a92
#2 [ffff88000c8e9b30] oops_end at ffffffff816427e8
#3 [ffff88000c8e9b60] no_context at ffffffff81635d6f
#4 [ffff88000c8e9bc0] __bad_area_nosemaphore at ffffffff81635f49
#5 [ffff88000c8e9c20] bad_area at ffffffff81635fc2
#6 [ffff88000c8e9c50] do_page_fault at ffffffff81645454
#7 [ffff88000c8e9d60] do_async_page_fault at ffffffff81644b75
#8 [ffff88000c8e9d80] async_page_fault at ffffffff81641de5
[exception RIP: sysrq_handle_crash+22]
RIP: ffffffff813cad46 RSP: ffff88000c8e9e38 RFLAGS: 00010092
RAX: 0000000000000010 RBX: 0000000000000063 RCX: 00000000ffffffff
RDX: 0000000000000000 RSI: 0000000000000082 RDI: 0000000000000063
RBP: ffff88000c8e9e38 R8: 0000000000000000 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff81c725e0
R13: 0000000000000286 R14: 0000000000000007 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#9 [ffff88000c8e9e40] __handle_sysrq at ffffffff813cb461
#10 [ffff88000c8e9e80] write_sysrq_trigger at ffffffff813cb51a
#11 [ffff88000c8e9eb0] proc_reg_write at ffffffff811d60e2
#12 [ffff88000c8e9f00] vfs_write at ffffffff81176053
#13 [ffff88000c8e9f30] sys_write at ffffffff8117637a
#14 [ffff88000c8e9f80] sysenter_dispatch at ffffffff8164bc70
RIP: 00000000f775e430 RSP: 00000000ffe6a720 RFLAGS: 00000296
RAX: 0000000000000004 RBX: ffffffff8164bc70 RCX: 00000000ffe6a81c
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 00000000ffe6a81c
RBP: 00000000ffe6a758 R8: 0000000000000000 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000
ORIG_RAX: 0000000000000004 CS: 0023 SS: 002b
crash> set unwind on
unwind: on
crash> bt
PID: 1962 TASK: ffff88000e5e0000 CPU: 0 COMMAND: "tee"
#0 [ffff88000c8e99f0] machine_kexec at ffffffff81038e0a
RIP: 00000000f775e430 RSP: 00000000ffe6a720 RFLAGS: 00000296
RAX: 0000000000000004 RBX: ffffffff8164bc70 RCX: 00000000ffe6a81c
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 00000000ffe6a81c
RBP: 00000000ffe6a758 R8: 0000000000000000 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000
ORIG_RAX: 0000000000000004 CS: 0023 SS: 002b
crash>
-> no functions no parameters
-------------------------------------------------------------------------------------------------------------
crash> extend crash/extensions/fp.so
./crash/extensions/fp.so: shared object loaded
crash> fp
.................
-> no functions no parameters
Did I anything wrong?
Best Regards,
Jan Willeke