[Bug debugedit/28728] Unknown DWARF DW_FORM_0x25 (DW_FORM_strx)

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28728

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
                 CC|                            |mark at klomp dot org
            Summary|Unknown DWARF DW_FORM_0x25  |Unknown DWARF DW_FORM_0x25
                   |                            |(DW_FORM_strx)
   Last reconfirmed|                            |2021-12-27
     Ever confirmed|0                           |1

--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
(In reply to Vitaly Chikunov from comment #0)
> When building Linux kernel with[1] CC=clang LLVM=1 and
> CONFIG_DEBUG_INFO_DWARF5=y debugedit reports error when processing compiled
> kernel modules, such as
> 
>   debugedit:
> ./lib/modules/5.16.0+rc6.20211223-drm-tip-alt1/kernel/sound/usb/caiaq/snd-
> usb-caiaq.ko: Unknown DWARF DW_FORM_0x25

That is DW_FORM_strx1, which is only partially supported by debugedit. Normally
the DW_FORM_strx forms are only used when generating split DWARF (.dwo) files.
Best workaround for now is to not use DWARF5 with llvm (which isn't the default
for clang/llvm anyway).

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