Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add dslsdzc/rev-skills --skill re-rtosgit clone --depth 1 https://github.com/dslsdzc/rev-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/dslsdzc/rev-skills/re-rtos)<a href="https://agentmods.dev/skills/dslsdzc/rev-skills/re-rtos"><img src="https://agentmods.dev/badge/skills/dslsdzc/rev-skills/re-rtos/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/dslsdzc/rev-skills/re-rtos"><img src="https://agentmods.dev/badge/skills/dslsdzc/rev-skills/re-rtos.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00099 | $0.05336 |
| Opus 5 | $0.00049 | $0.02668 |
| Sonnet 5 | $0.00020 | $0.01067 |
| Haiku 4.5 | $0.00010 | $0.00534 |
Grade A, and why
re-rtos scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
RTOS 结构分析（FreeRTOS / ThreadX / Zephyr / RT-Thread / VxWorks / QNX / INTEGRITY）
何时使用 / 何时不用
- 用：MCU/IoT 固件跑 RTOS——定位任务表/TCB、按任务拆分反编译、还原队列/信号量/互斥/定时器等内核对象
- 用：拿到的是裸镜像（无文件系统、无符号），需要从启动代码链找出调度器与全部任务入口
- 用：商业 RTOS 固件（VxWorks/QNX/INTEGRITY）——车机中控、航电、工控场景，同样从任务/线程控制块定位出发，按进程/分区/任务拆分分析
- 不用：裸机固件（无任务表/调度器，按普通 MCU 镜像分析，[[re-fw-extract]] → [[re-binary-core]]）
- 不用：Linux/Windows 内核（走 [[re-kernel]]）
- 不用：只需动态跑起来观察行为（走 [[re-fw-emulate]]）
工具准备
本技能以纯静态分析为主（免沙箱，[[platform-tips]] 最高原则）；需要动态验证时转 [[re-fw-emulate]]。工具可替换，方法为核心。
Ghidra（反编译与结构体定义主力）
- 下载: GitHub
NationalSecurityAgency/ghidrareleases，解压即用（无需安装） - JDK 21（Ghidra 11.3+ 要求）:
- Linux:
apt install openjdk-21-jdk/dnf install java-21-openjdk/pacman -S jdk21-openjdk - macOS:
brew install openjdk@21或brew install --cask temurin - Windows:
choco install temurin21
- Linux:
- 启动:
./ghidraRun（GUI）/./support/analyzeHeadless（无头） - 验证:
java -version（须 21+）；./support/analyzeHeadless -help正常输出 - 用法核心：Data Type Manager 定义 TCB/内核对象结构体后，类型传播会显著改善反编译质量
binwalk（镜像提取先行）
- Linux:
apt install binwalk（Debian/Ubuntu）/dnf install binwalk/pacman -S binwalk - pip（跨平台、版本新）:
pip install binwalk - macOS:
brew install binwalk - Windows/WSL: Windows 本机无官方包，用 WSL 内 Linux/pip 版
- 验证:
binwalk --version
python3（脚本化解析与批量标注）
- Linux:
apt install python3/dnf install python3/pacman -S python - macOS: 自带；Windows: 官方安装器或
choco install python - 验证:
python3 --version - 用途: 批量搜特征串/魔数、按字段偏移解析任务表、生成 Ghidra 脚本自动标注任务名/入口
操作步骤
按顺序执行，每步结果存档（任务清单、内核对象表、Ghidra 工程）。
-
前置：镜像提取与格式识别（衔接 [[re-fw-extract]] 流程）：
- 先按 [[re-fw-extract]] 完成：binwalk 解包 / dd 按偏移切分 /
file+readelf -h确认架构与字节序（大端 ARM/MIPS 固件常见） - 产物通常是裸镜像（raw binary）或单个 ELF；记录 reset handler 入口与 RAM 基址（从链接脚本/启动代码推断）——任务表与 TCB 都在 RAM 区，按链接地址解读
- 确认字节序与架构后再导入 Ghidra，避免整个分析白做
- 先按 [[re-fw-extract]] 完成：binwalk 解包 / dd 按偏移切分 /
-
RTOS 识别：启动代码链 + 特征串/符号搜索：
- 启动链形态：reset handler → 时钟/外设/内存初始化 → 创建任务（
xTaskCreate/osThreadNew/tx_thread_create/k_thread_create/rt_thread_create/ VxWorkstaskSpawn（6.x 及更早常用；7 中仍存在，内部实现为 taskCreate+taskActivate）或taskCreate（7 起，创建挂起任务需显式 taskActivate）/ QNXThreadCreate/ INTEGRITY ARINC 653 APEXCREATE_PROCESS）→ 调度器启动（vTaskStartScheduler/osKernelStart/tx_kernel_enter/rt_system_scheduler_start/ VxWorkskernelInit/ QNX 启动脚本拉起系统进程 / INTEGRITYSTART进入运行态）。调度器启动调用点之前的代码全是初始化，不属于任何任务 - 特征串：strings 搜内核名（"FreeRTOS"）、任务名（"Idle" 等）、版本/断言串；ELF 未 strip 时直接搜符号（
nm/ Ghidra Symbol Table：pxCurrentTCB、_tx_thread_created_list、_kernel、rt_thread_ready_priority_group） - 商业 RTOS 特征串：VxWorks 任务名（"tIdle" 空闲任务（VxWorks 6.x+）、"tRootTask" 根任务）与版本串；QNX 内核/镜像名（"procnto"、"imagefs"）与系统进程名（资源管理器惯用命名
io-*/devb-*/devc-*）；INTEGRITY 分区名/进程名与 ARINC 653 APEX 服务名 - ThreadX 无版本串可搜，靠调度入口
tx_kernel_enter+ TX_THREAD 魔数 ID（步骤 3）确认 - 不确定内核时：找 3-4 个任务创建调用点与调度入口的调用形态，对照各内核公开结构逐个排除
- 启动链形态：reset handler → 时钟/外设/内存初始化 → 创建任务（
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 111 lines · 99 tokens per session scan A b516ec0e0ee7
re-rtos is a skill published in the GitHub repository dslsdzc/rev-skills (54 stars, last pushed 14d ago), licensed Apache-2.0. It adds 99 tokens to every session and 5,336 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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