[Bug runtime/22671] New: MIPSEL error Unknown register: a4

["mysecondaccountabc at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=22671

            Bug ID: 22671
           Summary: MIPSEL error Unknown register: a4
           Product: systemtap
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: runtime
          Assignee: systemtap at sourceware dot org
          Reporter: mysecondaccountabc at gmail dot com
  Target Milestone: ---

Created attachment 10711
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10711&action=edit
kernel config

Having this error on mipsel emulation: 
...
stapio:stp_main_loop:861 systemtap_module_init() returned 0
ERROR: Unknown register: a4
stapio:stp_main_loop:852 got STP_REQUEST_EXIT
WARNING: Number of errors: 1, skipped probes: 0
stapio:stp_main_loop:841 got STP_EXIT
stapio:cleanup_and_exit:526 detach=0
...


# stap --version
Systemtap translator/driver (version 3.2/0.168, non-git sources)
Copyright (C) 2005-2017 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
tested kernel versions: 2.6.18 ... 4.11
enabled features: AVAHI LIBSQLITE3 NLS NSS

# uname -a
Linux arex-11f9b261f2 4.9.0-4-4kc-malta #1 Debian 4.9.65-3 (2017-12-03) mips
GNU/Linux

The Rootfs is a Debian Stretch.

It seems to be an ABI (O32/N32) issue, but not sure why it's happening. I've
locally compiled SystemTap from Systemtap 3.2 release
(https://sourceware.org/systemtap/ftp/releases/systemtap-3.2.tar.gz)

Any clue?

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