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feat: U4 ciphertext page dump tool

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- utrw/debug.c: utrw_debug_dump_page(slot,page,offset) — kernel debug-privileged dump of 64B ciphertext + decrypted plaintext hex to serial (PCKC key derive, no capability path)
- selftest demo: dump at offset 128 shows plaintext 'deshab utsm sealed memory selftest' vs unrelated ciphertext; SELFTEST PASS (.build_tmp/qemu_serial_u4dump.log)
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Linehu
2026-10-02 14:40:26 +08:00
parent 42fc06439c
commit 7925c09677
12 changed files with 123 additions and 3 deletions
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docs/TASKBOARD.md
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@@ -16,7 +16,7 @@
- [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）
- [ ] U4 密文页 dump 工具（明文/密文对照命令）
- [x] U4 密文页 dump 工具（utrw_debug_dump_page：密文/明文 hex 对照，selftest 演示 PASS）
- [ ] U5 UTSM selftest 全覆盖（修 chacha20 KAT 间歇 FAIL，覆盖率 ≥70%）
## 🔌 三期：自由（DKM/用户态）