[Bug tdep/19268] New: reverse debugging on ARM doesn't support uxtb/sxth/etc

["sandra at codesourcery dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19268

            Bug ID: 19268
           Summary: reverse debugging on ARM doesn't support uxtb/sxth/etc
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tdep
          Assignee: unassigned at sourceware dot org
          Reporter: sandra at codesourcery dot com
  Target Milestone: ---

Running the gdb.reverse tests on armv7-a multilibs, I am seeing a lot of
failures like:

Process record does not support instruction xe6ef3073 at address 0x10770.

or

Process record does not support instruction xe6bf3073 at address 0x10748.

on different test cases.  These instructions are UXTB and SXTH, respectively. 
I don't see any code to handle these (or similar instructions, like UXTH) in
arm-tdep.c.

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