[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #10 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Simon Marchi <simark@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=0bc2e38dd71e24676e180b6b37e0a2cd1186994d

commit 0bc2e38dd71e24676e180b6b37e0a2cd1186994d
Author: Simon Marchi <simon.marchi@polymtl.ca>
Date:   Thu Dec 3 15:47:56 2020 -0500

    gdb: fix logic of find_comp_unit and set_comp_unit

    The logic in find_comp_unit and set_comp_unit is reversed.  When the BFD
    requires relocation, we want to put the comp_unit structure in the
    map where the comp_unit objects are not shared, that is the one indexed
    by objfile.  If the BFD does not require relocation, then, we can share
    a single comp_unit structure for all users of that BFD, so we want to
    put it in the BFD-indexed map.  The comments on top of
    dwarf2_frame_bfd_data and dwarf2_frame_objfile_data make that clear.

    Fix it by swapping the two in find_comp_unit and set_comp_unit.

    I don't have a test for this, because I don't see how to write one in a
    reasonable amount of time.

    gdb/ChangeLog:

            PR gdb/26876
            * dwarf2/frame.c (find_comp_unit, set_comp_unit): Reverse use of
            dwarf2_frame_bfd_data and dwarf2_frame_objfile_data.

    Change-Id: I80c1ee7ad8425fa4947de65b170973d05f5a52ec

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