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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/STATUS.md
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@@ -27,7 +27,7 @@
| 封缄段表 / UUID 调谐（U1） | ✅ | 段创建/查询闭环 | `CODE/UTSM/core/segment.c` |
| UTRW Fast Path | ✅ | capability→PCKC→line 解密→seqlock | `utrw/read.c` |
| UTRW Slow Path（U2） | ✅ | EPOCH 刷新 / KEY_MISS 重派生 / POISONED+MAC_FAILED→DRR / STALE_CAP 拒绝；全分支 selftest PASS | `utrw/slow_path.c` + `.build_tmp/qemu_serial_u2slowpath.log` |
| `@sealed` 段标记（U3） | ⬜ | 未实现 | — |
| `@sealed` 段标记（U3） | ✅ | 默认封缄；`UTSM_SEG_F_UNSEALED` 段明文直存（0 加解密开销，capability/dirty/checkpoint 照走）；linker.ld `.sealed` section + `__sealed_start/end` 符号就位 | `.build_tmp/qemu_serial_u3sealed.log` + llvm-nm |
| 密文页 dump（U4） | ✅ | `utrw_debug_dump_page(slot,page,offset)`：串口输出 64B 密文/明文 hex 对照（selftest 内置演示） | `.build_tmp/qemu_serial_u4dump.log` |
| selftest（U5） | ✅ | chacha20 KAT 落地为 RFC 8439 §2.4.2 官方向量（gen_chacha_kat.py 生成，pycryptodome 独立对拍）；"间歇 FAIL" 确认为幽灵缺陷（该测试从未合并进本树）；page MAC 确定性检查已加；全量 selftest 稳定 PASS | `.build_tmp/qemu_serial_u5kat.log` |
| 真实加密原语 | 🔶 | chacha20/KDF/MAC 已落（Phase 9 早期），PCKC schedule 待接 | `crypto/` |