Simple, kernel-only, 64bit OS, early stage. https://git.2137697.xyz/rs-dos/atom?h=qemu 2026-08-01T01:47:51Z 2026-08-01T01:47:51Z salmonik salmonik@tuta.io 2026-08-01T01:47:51Z urn:sha1:7c5603b2fed27be86982665a8b10dcd8f1c5a483 - edition = "2024" in the workspace manifest and rsdosedit - extern blocks must be unsafe: interrupts.rs ISR stubs -> unsafe extern "C" - #[no_mangle] -> #[unsafe(no_mangle)] (efi_main, isr_dispatch) - One missed static-mut read in free_list_insert wrapped in an explicit unsafe block (edition 2024 removed the implicit unsafe context inside unsafe fns) - rustfmt reflows for 2024: nested if-lets become let-chains, imports re-sorted, rsdosedit help-screen box rows wrapped No codegen-affecting changes. Validated: cargo check/clippy/fmt clean (host + uefi target), make test-disk PASS, editor round-trip PASS. 2026-07-31T13:51:28Z salmonik salmonik@tuta.io 2026-07-31T13:51:28Z urn:sha1:5e03409586efc37931f07b40ee0c71a9a9e109f7 - uefi.rs: full EfiMemoryType constants (0-14) + memory_type_name(); fix MEMORY_TYPE_LOADER_DATA from 6 to 2 per the UEFI spec - memory.rs: replace the bump allocator with a first-fit free-list heap (splitting, coalescing, 8-byte back-pointer for alignment-safe free); add a bitmap physical page allocator (heap region reserved, page-0 guard, aligned runs); grow the heap from the page allocator on demand - paging.rs: identity page-table helpers — adopt_tables() rebuilds the firmware map into our own tables (OVMF maps its tables read-only, so the firmware tree can't be modified in place) and switches CR3; map_page/unmap_page/is_mapped with 2 MB/1 GB large-page splitting - main.rs: boot self-tests for heap, pages, and paging