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From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
To: elfutils-devel@sourceware.org
Subject: [Bug libdw/31447] Provide a public debug section relocation function
Date: Sun, 03 Mar 2024 12:35:52 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31447

--- Comment #1 from Mark Wielaard <mark at klomp dot org> ---
This is the current "workaround" I use when working with individual ET_REL
DWARF files (also works for any other ELF type):

 static char *debuginfo_path =3D NULL;
 static const Dwfl_Callbacks dwfl_callbacks =3D
    {
      .find_elf =3D dwfl_build_id_find_elf,
      .find_debuginfo =3D dwfl_standard_find_debuginfo,
      .section_address =3D dwfl_offline_section_address,
      .debuginfo_path =3D &debuginfo_path,
    };

 int main (int argc, char **argv)
 {
    Dwfl *dwfl =3D dwfl_begin (&dwfl_callbacks);
    Dwfl_Module *module =3D dwfl_report_elf (dwfl, argv[1], argv[1], -1, 0,
false);
    if (module =3D=3D NULL)
      printf ("%s\n", dwfl_errmsg (-1));
    dwfl_report_end (dwfl, NULL, NULL);

    Dwarf_Addr bias;
    Dwarf *dwarf =3D dwfl_module_getdwarf (module, &bias);
    if (dwarf =3D=3D NULL)
      printf ("%s\n", dwfl_errmsg (-1));

    /* ... do something with dwarf ... */

    dwfl_end (dwfl); // Also cleans up dwarf.
 }

But this is obviously a little cumbersome if not really using any other lib=
dwfl
features.

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