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[Launchpad Bug Tracker <1466686@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package crash - 7.0.3-3ubuntu4.2

---------------
crash (7.0.3-3ubuntu4.2) trusty; urgency=medium

  * Initial-working-implementation-of-the-basic-ARM64-bt.patch,
    Cleaned-up-the-exception-frame-displays-of-64-bit-in.patch,
    Implemented-support-for-the-ARM64-bt-e-option.patch,
    Implemented-support-for-the-ARM64-bt-l-option.patch:
     - Add initial ARM64 support for the 'bt' command. (LP: #1466686)
  * Fix-for-the-ARM64-page-size-determination-on-Linux-4.patch. (LP: #1460941)

 -- dann frazier <dann.frazier@xxxxxxxxxxxxx>  Tue, 23 Jun 2015 09:37:27
-0500

** Changed in: crash (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1466686

Title:
  crash: arm64: don't support some BT commands

Status in crash package in Ubuntu:
  Fix Released
Status in crash source package in Trusty:
  Fix Released

Bug description:
  On trusty, some BT commands are missed for ARM64.

  [Impact]
  some BT commands aren't usable, such as bt -e, bt -l, ...

  [Test Case]
  - start crash
  - run bt -e

  crash> bt -e
  PID: 2113   TASK: ffffffc3e3446180  CPU: 5   COMMAND: "crash"
  bt: arm64_eframe_search: function not implemented

  
  [Regression Potential]
  These changes are to code that only gets compiled on arm64, so
  there's no risk to other architectures. Also the proposed change is
  merged to upstream alread.

  The patches in below link can make them workable:

  http://kernel.ubuntu.com/git/ming/crash-
  trusty.git/commit/?id=3d11253387a609283054c8b0d76b0d33704b6e27

  http://kernel.ubuntu.com/git/ming/crash-
  trusty.git/commit/?id=2c43ddb93e0591e14c92c5d7469ed2c6029df5a5

  http://kernel.ubuntu.com/git/ming/crash-
  trusty.git/commit/?id=f384eaa863b82009caaf136bc88c3e6f5c0ceb66

  http://kernel.ubuntu.com/git/ming/crash-
  trusty.git/commit/?id=653aa6bc8b5108bf6a6f737275fe4a1b94ba4703

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