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feat: U3 @sealed optional segment marking - phase 2 complete

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- UTSM_SEG_F_UNSEALED: plaintext direct-store segments (zero crypto overhead) while keeping capability checks, dirty tracking, intent/commit log and seqlock protocol; default remains sealed
- linker.ld: .sealed output section with __sealed_start/__sealed_end symbols for future static sealed data
- selftest: unsealed segment stores plaintext verifiably + read-back, full SELFTEST PASS (.build_tmp/qemu_serial_u3sealed.log)
- phase 2 (UTSM/UTRW) now complete in ROADMAP_INSANE
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Linehu
2026-10-02 15:30:25 +08:00
parent 1e74ee9fab
commit ba16217afe
17 changed files with 104 additions and 5 deletions
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docs/TASKBOARD.md
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@@ -15,7 +15,7 @@
- [x] U1 UTSM 元数据区 / UUID 调谐表
- [x] U2 UTRW Slow Path 真分支（EPOCH/KEY_MISS 恢复 + MAC_FAILED/POISONED→DRR；selftest PASS）
- [ ] U3 `@sealed` 段可选标记（链接脚本 `__sealed` section）
- [x] U3 `@sealed` 段可选标记（`UTSM_SEG_F_UNSEALED` 明文直存段 + linker.ld `.sealed` section；selftest PASS）
- [x] U4 密文页 dump 工具（utrw_debug_dump_page：密文/明文 hex 对照，selftest 演示 PASS）
- [x] U5 UTSM selftest 全覆盖（RFC 8439 KAT 落地，"间歇 FAIL" 确认为幽灵缺陷；全量稳定 PASS）