[Bug dyninst/15386] New: stapdyn can't set registers

["jistone at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15386

             Bug #: 15386
           Summary: stapdyn can't set registers
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dyninst
        AssignedTo: systemtap@sourceware.org
        ReportedBy: jistone@redhat.com
    Classification: Unclassified


The way registers are filled now (PR14573) is an input-only scheme.  We're
passing a BPatch_registerExpr for each register and filling it into pt_regs
ourselves.  This leaves no way for us to return updated values.

If we could get Dyninst to hand us its spill area as a pt_regs struct, that
would be ideal -- both as a faster way to get registers in the handler, and to
let us influence what gets restored to the process.

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