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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/30807] Process record does not support instruction 0x62
 (AVX512)
Date: Tue, 29 Aug 2023 17:44:28 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30807

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gn=
u.org> ---
The master branch has been updated by Simon Marchi <simark@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dbinutils-gdb.git;h=3D4fd1ba162ed6=
f197169d2af29f4230d7a89e2636

commit 4fd1ba162ed6f197169d2af29f4230d7a89e2636
Author: Simon Marchi <simon.marchi@efficios.com>
Date:   Tue Aug 29 12:19:02 2023 -0400

    gdb/testsuite: recognize one more unsupported instruction in
gdb.reverse/step-precsave.exp

    When running this test on a processor that supports AVX512 (AMD EPYC
    9634) on Debian 12 bookwork (system compiler is gcc 12.2.0), I see:

        continue^M
        Continuing.^M
        Process record does not support instruction bound.^M
        Process record does not support instruction 0x62 at address
0x7ffff7f49b40.^M
        Process record: failed to record execution log.^M
        ^M
        Program stopped.^M
        0x00007ffff7f49b40 in ?? () from /lib/x86_64-linux-gnu/libc.so.6^M
        (gdb) FAIL: gdb.reverse/step-precsave.exp: run to end of main

    The instruction at this address is:

       0x00007ffff7f49b40:  62 e2 7d 48 7a c6   vpbroadcastb %esi,%zmm16

    This seems like an AVX512 instruction (given the use of zmm16).  Match
    this byte value in order to produce a KFAIL.

    Change-Id: I1d20357fa538ba60b9c537160acf511a37d751ee
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=3D30807
    Approved-By: Tom Tromey <tom@tromey.com>

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