[Crash-utility] [PATCH} crash 4.0-2.8 fixes to make itworkonx86_64 for 2.6.14

[Dave Anderson]

Badari Pulavarty wrote:

> Dave,
>
> Here is the latest patch to make crash work on 2.6.14 kernel -
> with fixes for 4-level pagetables also.
>
> I changes & naming are kind of hacky (especially with naming)
> -- but to cleanup it completely and have backward compatibility
> needs more work. We should get rid of PML4 completely and
> move to PGD/PUD/PMD/PTE.
>
> Thanks,
> Badari
>

That's some nice work you've done here -- I can't thank you enough!

But are you saying that with this patch, it does *not* have backwards-compatibility?
It looks like you've completely segregated the new code to me.

Dave


>
> elm3a242:~/crash-4.0-2.8 # ./crash
>
> crash 4.0-2.8
> Copyright (C) 2002, 2003, 2004, 2005  Red Hat, Inc.
> Copyright (C) 2004, 2005  IBM Corporation
> Copyright (C) 1999-2005  Hewlett-Packard Co
> Copyright (C) 1999, 2002  Silicon Graphics, Inc.
> Copyright (C) 1999, 2000, 2001, 2002  Mission Critical Linux, Inc.
> This program 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.  Enter "help copying" to see the conditions.
> This program has absolutely no warranty.  Enter "help warranty" for
> details.
>
> GNU gdb 6.1
> 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 "x86_64-unknown-linux-gnu"...
>
>       KERNEL: /usr/src/linux-2.6.14.madv/vmlinux
>     DUMPFILE: /dev/mem
>         CPUS: 2
>         DATE: Thu Nov  3 08:25:50 2005
>       UPTIME: 07:12:24
> LOAD AVERAGE: 0.60, 0.43, 0.18
>        TASKS: 62
>     NODENAME: elm3a242
>      RELEASE: 2.6.14
>      VERSION: #3 SMP PREEMPT Wed Nov 2 03:08:36 PST 2005
>      MACHINE: x86_64  (3000 Mhz)
>       MEMORY: 4.6 GB
>          PID: 31320
>      COMMAND: "crash"
>         TASK: ffff810122f11860  [THREAD_INFO: ffff8100987f6000]
>          CPU: 1
>        STATE: TASK_RUNNING (ACTIVE)
>
> crash> set
>     PID: 31320
> COMMAND: "crash"
>    TASK: ffff810122f11860  [THREAD_INFO: ffff8100987f6000]
>     CPU: 1
>   STATE: TASK_RUNNING (ACTIVE)
> crash> vm
> PID: 31320  TASK: ffff810122f11860  CPU: 1   COMMAND: "crash"
>        MM               PGD          RSS    TOTAL_VM
> ffff810122e93700  ffff810099584000  148044k   86512k
>       VMA           START       END     FLAGS FILE
> ffff810122438cc0     400000     754000   1875 /root/crash-4.0-2.8/crash
> ffff810122438590     853000     8b0000 101873 /root/crash-4.0-2.8/crash
> ffff810122438d78     8b0000    1c2e000 100073
> ffff810122438088 2aaaaaaab000 2aaaaaac0000    875 /lib64/ld-2.3.3.so
> ffff8101224389e0 2aaaaaac0000 2aaaaaac2000 100073
> ffff810123caa4d8 2aaaaaac2000 2aaaaaaf5000
> 71 /usr/lib/locale/en_US.utf8/LC_CTYPE
> ffff810123caaee8 2aaaaaaf5000 2aaaaaafb000
> d1 /usr/lib64/gconv/gconv-modules.cache
> ffff8101136809e0 2aaaaaafb000 2aaaaaaff000 100073
> ffff8101224387b8 2aaaaabc0000 2aaaaabc2000 100873 /lib64/ld-2.3.3.so
> ffff810122438648 2aaaaabc2000 2aaaaac16000     75 /lib64/tls/libm.so.6
> ffff810122438700 2aaaaac16000 2aaaaacc2000     70 /lib64/tls/libm.so.6
> ffff8101276f4590 2aaaaacc2000 2aaaaad19000 100073 /lib64/tls/libm.so.6
> ffff8101276f4a98 2aaaaad19000 2aaaaad1a000 100073
> ffff810120ff1590 2aaaaad1a000 2aaaaad64000
> 75 /lib64/libncurses.so.5.4
> ffff8101276f4b50 2aaaaad64000 2aaaaae1a000
> 70 /lib64/libncurses.so.5.4
> ffff810120ff14d8 2aaaaae1a000 2aaaaae7a000
> 100073 /lib64/libncurses.so.5.4
> ffff810120ff1140 2aaaaae7a000 2aaaaae7b000 100073
>
> crash> rd -u 0x400000
>           400000:  00010102464c457f                    .ELF....
> crash> rd -u 2aaaaaaab000
>     2aaaaaaab000:  00010102464c457f                    .ELF....
>
> crash> mod
>      MODULE       NAME          SIZE  OBJECT FILE
> ffffffff88012600  dm_mod       70872  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff8805ef80  ipv6        312832  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff8806e200  parport      47244  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff88073800  lp           17232  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff8807fd00  parport_pc   33896  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff8808ab00  usbserial    39280  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff8808e900  hw_random     7968  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff88098f80  uhci_hcd     38304  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff880a4600  ehci_hcd     39944  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff880acd80  i2c_core     29568  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff880b1700  i2c_i801     11540  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff880b6000  joydev       13952  (not loaded)  [CONFIG_KALLSYMS]
> ffffffff880bb000  edd          13984  (not loaded)  [CONFIG_KALLSYMS]
>
>   ------------------------------------------------------------------------------------------------------------------------
>                                 Name: x86_64-crash-fixes2.patch
>    x86_64-crash-fixes2.patch    Type: text/x-patch
>                             Encoding: 7bit
>
>   ------------------------------------------------------------------------------------------------------------------------
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