[Crash-utility] crash-4.0-2.10 ppc64 4-level pagetable fixes

[Badari Pulavarty]

Hi Dave,

Here are the fixes to make crash understand PPC64 4-level pagetable
layout.

I am not a PPC64 expert, I coded up looking at the ppc64 kernel
pagetable handling code. It seems to work fine for most part.

But I do get occasional, "user virtual" translation failures. 
I think I screwed up PMD calculations. I am not able to spot 
the problem. Can some one help ?

Thanks,
Badari


elm3b157:~/crash-4.0-2.10.new # ./crash

crash 4.0-2.10
Copyright (C) 2002, 2003, 2004, 2005  Red Hat, Inc.
Copyright (C) 2004, 2005  IBM Corporation
Copyright (C) 1999-2005  Hewlett-Packard Co
Copyright (C) 2005  Fujitsu Limited
Copyright (C) 2005  NEC Corporation
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 "powerpc64-unknown-linux-gnu"...

      KERNEL: /usr/src/linux-2.6.14/vmlinux
    DUMPFILE: /dev/mem
        CPUS: 4
        DATE: Tue Nov  8 11:02:01 2005
      UPTIME: 06:41:51
LOAD AVERAGE: 0.08, 0.03, 0.06
       TASKS: 103
    NODENAME: elm3b157
     RELEASE: 2.6.14
     VERSION: #1 SMP Thu Nov 3 13:22:57 PST 2005
     MACHINE: ppc64  (1655 Mhz)
      MEMORY: 3.7 GB
         PID: 32605
     COMMAND: "crash"
        TASK: c0000000e304e040  [THREAD_INFO: c0000000934c8000]
         CPU: 0
       STATE: TASK_RUNNING (ACTIVE)

crash> set
    PID: 32605
COMMAND: "crash"
   TASK: c0000000e304e040  [THREAD_INFO: c0000000934c8000]
    CPU: 1
  STATE: TASK_RUNNING (ACTIVE)
crash> vm
PID: 32605  TASK: c0000000e304e040  CPU: 1   COMMAND: "crash"
       MM               PGD          RSS    TOTAL_VM
c0000000dc048080  c000000093e2f000  137464k   76800k
      VMA              START             END        FLAGS FILE
c0000000e3c16ee8           100000           103000     75
c0000000d7b92ee8         10000000         10590000
1875 /root/crash-4.0-2.10.new/crash
c0000000d7b92870         1059f000         1069a000
101873 /root/crash-4.0-2.10.new/crash
c0000000d7b92420         1069a000         11858000 100073
c0000000e3979cc0      40000000000      4000001d000
875 /lib64/ld-2.3.3.so
c0000000e23f57b8      4000001d000      40000022000 100073
c0000000e23f5700      4000002d000      40000030000
100873 /lib64/ld-2.3.3.so
c0000000ebf55648      40000048000      400000ba000
75 /lib64/tls/libm.so.6
c0000000e3c162b0      400000ba000      400000c8000
70 /lib64/tls/libm.so.6
c0000000ebf554d8      400000c8000      400000cf000
100073 /lib64/tls/libm.so.6
c0000000ebf55368      400000cf000      40000130000
75 /lib64/libncurses.so.5.4
c0000000ebf55d78      40000130000      4000013f000
70 /lib64/libncurses.so.5.4
c0000000ebf55a98      4000013f000      40000156000
100073 /lib64/libncurses.so.5.4
c0000000ebf55420      40000156000      40000159000 100073
c0000000ebf552b0      40000159000      4000015d000
75 /lib64/libdl.so.2
c0000000ebf55e30      4000015d000      40000169000
70 /lib64/libdl.so.2
c0000000ebf55870      40000169000      4000016d000
100073 /lib64/libdl.so.2
c0000000e3979d78      4000016d000      40000184000
75 /lib64/libz.so.1.2.1
c0000000ebf55590      40000184000      4000018d000
70 /lib64/libz.so.1.2.1
c0000000e39791f8      4000018d000      40000194000
100073 /lib64/libz.so.1.2.1
c0000000ebf557b8      40000194000      40000195000 100073
c0000000e3979590      40000195000      400002d6000
75 /lib64/tls/libc.so.6
c0000000e39797b8      400002d6000      400002e5000
70 /lib64/tls/libc.so.6
c0000000e23f5870      400002e5000      40000303000
100073 /lib64/tls/libc.so.6
c0000000e3979c08      40000303000      40000307000 100073
c0000000e1308e30      40000307000      4000033a000
71 /usr/lib/locale/en_US.utf8/LC_CTYPE
c0000000d7b92700      4000033a000      4000035a000 100073
c0000000eb825b50      4000035a000      40000361000
75 /lib64/tls/libthread_db.so.1
c0000000eb825368      40000361000      4000036a000
70 /lib64/tls/libthread_db.so.1
c0000000eb825870      4000036a000      40000372000
100073 /lib64/tls/libthread_db.so.1
crash> rd -u 100000
          100000:  7f454c4602020100                    .ELF....
crash> rd -u 40000169000
rd: invalid user virtual address: 40000169000  type: "64-bit UVADDR"

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