[Bug runtime/13350] New: dwarf unwinder _stp_valid_pc_addr() invalid for s390x

[mjw at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13350

             Bug #: 13350
           Summary: dwarf unwinder _stp_valid_pc_addr() invalid for s390x
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap@sourceware.org
        ReportedBy: mjw@redhat.com
    Classification: Unclassified


runtime/stack-dwarf.c contains _stp_valid_pc_addr() which checks whether or not
a given address is valid as either a kernel or user address. The current
implementation just doesn't work for s390x.

To get a good implementation we need answers similar to:
http://sourceware.org/ml/systemtap/2011-q4/msg00064.html

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