nx_dwarf_addr.nx

nx_dwarf_addr.nx -- DWARF v5 .debug_addr builder. Same indirection trick as .debug_str_offsets, applied to runtime code addresses. DWARF v4 stored each address inline as 8 bytes in DIE attributes (DW_FORM_addr). DWARF v5 introduces DW_FORM_addrx -- a uleb128 index into a per-CU address table living in .debug_addr. Benefits: - All link-time-relocated addresses concentrate in ONE section (the linker only patches .debug_addr, never DIEs). - DIEs become smaller and more compressible. - Addresses can be deduplicated within a CU. Per-CU layout (DWARF v5 7.27): length u32 (excludes itself) version u16 = 5 addr_size u8 = 8 segment_selector u8 = 0 addresses[] 8 bytes each (vaddr post-link) Caller emits one CU contribution per .debug_info CU and writes one u64 per address the CU references. DIE attributes use form DW_FORM_addrx (uleb128 index). Pairs with nx_dwarf_info (consumer) + nx_dwarf_str_offsets (sister DWARF v5 indirection).