| Commit message (Collapse) | Author | Age | Files | Lines |
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176-byte frames
- sched: 16-slot static table, shell=task 0, idle=task 1, spawn with
guard page + 8 KiB stack, RR on the 100 Hz tick, int 0x60 yield,
sleep_ms, lazy reap, jobs/bg/sleep/kill shell commands
- gdt: own GDT mirroring UEFI selectors + TSS with IST1/IST2
(guard-page overflows die gracefully instead of triple-faulting)
- interrupts: isr_dispatch returns next frame in rax; IntFrame grows
rsp/ss fields — QEMU's 64-bit iretq always pops all five slots from
a 176-byte frame, so synthetic task frames must carry rsp=top+ss
(a 160-byte frame made the first iretq pop rsp/ss from the unmapped
page beyond the frame)
- panic handler: task panics abort the task, shell keeps running
- main: sched::init moved after page allocator + adopted tables
(the idle's stack+guard need both; it was silently not spawning)
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- interrupts::uptime_ms(): monotonic ms since boot — the 100 Hz PIT
tick (10 ms) plus interpolation from the PIT's live 1.19 MHz
down-counter (read twice around the tick load; a count jump means a
tick fired between reads) for true sub-ms resolution. TICKS widened
AtomicU16 -> AtomicU64 (u16 wrapped after ~11 min).
- PIT_READY gates interpolation until interrupts::init configures the
timer, so early-boot lines are deterministically [0000.000] instead
of uninitialised-PIT noise; klog clamps timestamps monotonic.
- The CMOS RTC cannot provide milliseconds (1 Hz BCD device, seconds
only) — millis come from the PIT.
- klog stores ms per line at append time; dump format is now
'[0000.123] 000000 === rsnix boot ===' (user-specified format).
Verified in QEMU: first line [0000.000], Phase-2 lines show real
monotonic ms (fs: vfs ready at [0000.519], self-test [0000.524]),
per-dump monotonicity, boot.log persists timestamps, test-disk round
trip fsck-clean.
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- 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.
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Warning cleanup (cargo check + clippy now 0 across the workspace):
- Migrate all 21 static_mut_refs sites to &raw mut accessors (fat, gop,
ps2, vt, ahci, interrupts, memory) so edition 2024 won't deny them
- panic = "abort" profiles: bare cargo check/build now works without
nightly/-Zbuild-std
- Wire TICKS in the timer ISR (it was never incremented, so the vt scroll
batching trigger was dead code)
- Clippy: efi_main becomes unsafe extern "efiapi" with a # Safety doc,
KeyBuf::new uses inline-const array repeat (no interior-mutable const),
editor main loop is a while-let, PIT control byte regrouped
- [workspace.lints.clippy] allows result_unit_err + needless_range_loop
(deliberate kernel style); large_enum_variant allowed on LineInput
- Drop now-stale static_mut_refs allow from the rsdos bin
FAT32 correctness fixes (both pre-existing, exposed by the SFN fix):
- Unique 8.3 short names: to_8_3() never disambiguated collisions, so
files sharing a long-name prefix got identical SFNs and fsck reported
duplicate directory entries. Add dir_short_names() + unique_short_name()
(~N tails, Windows-style) and force LFN when the SFN changes.
- Multi-cluster directories: scan_dir/dir_short_names stopped at the first
0x00 slot, hiding every entry written into a chained cluster (writes
failed with 'cannot write', duplicate SFNs accumulated); add_dir_entry
now packs the cluster (0xE5 deleted-markers) before extending so other
FAT readers (mtools, Windows) see the continuation too.
Other: delete dead fields (Disk.fis, Volume.fat_count), drop timer_irq/
keyboard_irq/rendered, refresh_and_exit is a documented unsafe fn, CONTEXT
.md corrected (stable toolchain, IRQ input, 4-crate layout), .gitignore
excludes .pi-subagents artifacts.
Validated: cargo check/clippy/fmt clean, make test-disk PASS on fresh and
reused images (incl. two directory-chain extensions and ~10 SFN tails),
editor round-trip smoke test PASS.
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Architecture:
rs-dos/ (workspace root, was raisernics/)
├── rsnix/ — kernel lib crate (uefi, serial, gop, ps2, interrupts, memory)
├── shell/ — shell lib crate (prompt, commands, line input)
├── rsdos/ — binary crate (efi_main, init, panic handler)
└── rsboot/ — future git submodule
No functional changes — boots to shell prompt identically.
Version auto-pulled from Cargo.toml via env!("CARGO_PKG_VERSION").
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