[Bug uprobes/5163] New: tweak uprobes.ko build process

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

We need to tweak some of the uprobes.ko build steps from bug #5079.
Several problems: /usr/share/systemtap/runtime/uprobes is the wrong place
to build an object file into; /usr could be read-only; the file may not be
easily accessible to staprun except in the local/immediate probing scenario;
uprobes.ko is kernel-version/arch. dependent, just like the systemtap probe
module.

Let's investigate building the uprobes.ko more similarly to probe modules.

It could be stored in the module cache directory ($SYSTEMTAP_DIR/uprobes/).
It could be given a name that encodes the version/architecture parameters
(so the cache directory itself can be shared between machines).  Instead
of passing just "-u" to staprun and have it find uprobes.ko someplace,
pass "UPROBEFILENAME.ko" itself in addition ot the "PROBEFILE.ko".
"stap -p4" could itself print out both needed modules.

-- 
           Summary: tweak uprobes.ko build process
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: uprobes
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: fche at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=5163

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