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From: "emr-gnu at hev dot psu.edu" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug remote/27257] New: Remote debugging i686 target from an x86_64
 system produces "Unknown register zmm16h requested"
Date: Wed, 27 Jan 2021 15:15:43 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27257

            Bug ID: 27257
           Summary: Remote debugging i686 target from an x86_64 system
                    produces "Unknown register zmm16h requested"
           Product: gdb
           Version: 9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: remote
          Assignee: unassigned at sourceware dot org
          Reporter: emr-gnu at hev dot psu.edu
  Target Milestone: ---

Debugging a simple "Hello World" program built using "gcc -m32" on an x86_64
system via gdbserver fails.

/opt/gdb-9.2/bin/gdbserver localhost:45678 ./helloworld
Process ./helloworld created; pid=3D25964
Listening on port 45678


> Separate terminal:
/opt/gdb-9.2/bin/gdb ./helloworld
(gdb) target remote localhost:45678
Remote debugging using localhost:45678
Remote connection closed
(gdb)


> gdbserver terminal:
Remote debugging from host ::1, port 38036
../../../gdb-9.2/gdb/gdbserver/regcache.c:257: A problem internal to GDBser=
ver
has been detected.
Unknown register zmm16h requested


emr:/tmp$ uname -smo
Linux x86_64 GNU/Linux

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