Reading cu and tu Debug Fission data

Example using dwarf_get_xu_index_header.

Debug Fission is an older name for Split Dwarf.

*/
int exampley(Dwarf_Debug dbg, const char *type,
    Dwarf_Error *error)
{
    /* type is "tu" or "cu" */
    int                   res = 0;
    Dwarf_Xu_Index_Header xuhdr = 0;
    Dwarf_Unsigned        version_number = 0;
    Dwarf_Unsigned        offsets_count = 0; /*L */
    Dwarf_Unsigned        units_count = 0; /* M */
    Dwarf_Unsigned        hash_slots_count = 0; /* N */
    const char           *section_name = 0;
 
    res = dwarf_get_xu_index_header(dbg,
        type,
        &xuhdr,
        &version_number,
        &offsets_count,
        &units_count,
        &hash_slots_count,
        &section_name,
        error);
    if (res != DW_DLV_OK) {
        return res;
    }
    /* Do something with the xuhdr here . */
    dwarf_dealloc_xu_header(xuhdr);
    return DW_DLV_OK;
}