[Bug libelf/26878] elflint reports error on SHT_X86_64_UNWIND .eh_frame section

mark at klomp dot org sourceware-bugzilla@sourceware.org
Tue Nov 17 13:45:39 GMT 2020


Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
             Status|NEW                         |ASSIGNED
                 CC|                            |mark at klomp dot org

--- Comment #1 from Mark Wielaard <mark at klomp dot org> ---
(In reply to Timm Bäder from comment #0)
> Created attachment 12953 [details]
> elfstrmerge.o compiled with clang
> gold and clang seem to emit .eh_frame sections of type SHT_X86_64_UNWIND.

And we already handle gold, which (normally) outputs .eh_frame (and
.eh_frame_hdr) without any relocations (because that is what a linker does,
resolve the relocations :). So for non-ET_REL files we already seem to handle
SHT_X86_64_UNWIND see:

commit 22ec8efc1dd87cdc7892523457eb55990b967224
Author: Mark Wielaard <mark@klomp.org>
Date:   Sat Nov 10 23:33:03 2018 +0100

    elflint: Allow PT_GNU_EH_FRAME segment to match SHT_X86_64_UNWIND section.

    The gold linker might generate an .eh_frame_hdr with a SHT_X86_64_UNWIND
    type instead of a SHT_PROGBITS type.

    Signed-off-by: Mark Wielaard <mark@klomp.org>

commit 4b0342b85b5b1a3d3636e06e3b5320954828dfb1
Author: Mark Wielaard <mark@klomp.org>
Date:   Tue Nov 6 12:01:25 2018 +0100

    backends: Add x86_64 section_type_name for SHT_X86_64_UNWIND.

    Makes sure that eu-readelf and eu-elflint recognize and show the
    x86_64 specific section type correctly.

    Signed-off-by: Mark Wielaard <mark@klomp.org>
    Tested-by: Milian Wolff <milian.wolff@kdab.com>

And I see that Navin just posted a fix for eblcheckreloctargettype:

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