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From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
To: elfutils-devel@sourceware.org
Subject: [Bug libdw/31447] New: Provide a public debug section relocation
 function
Date: Sun, 03 Mar 2024 12:19:09 +0000
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X-Bugzilla-Component: libdw
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31447

            Bug ID: 31447
           Summary: Provide a public debug section relocation function
           Product: elfutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libdw
          Assignee: unassigned at sourceware dot org
          Reporter: mark at klomp dot org
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

When opening an ET_REL file with dwarf_begin no relocations are resolved an=
d no
error checking is done if that is necessary. Causing some functions to prod=
uce
errors or wrong results (because an index is wrongly assumed to be zero).

When opening such a file through libdwfl we do resolve all cross-debug-sect=
ion
relocations using __libdwfl_relocate.

It would be good to make this a public function. Maybe through libdwelf
dwelf_relocation_debug_sections (Elf *elf). So users can make sure ET_REL f=
iles
can be handled by libdw.

And maybe add a check/flag in dwarf_begin so an error can be produced if a
relocation value is needed for a correct result.

--=20
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