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readme: document --subs-only flag

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2026-06-29 12:55:18 +01:00
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README.md
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@@ -26,10 +26,11 @@ It handles indirect branches by:
## usage
```
cfgrip <binary>
cfgrip [--subs-only] <binary>
```
That's it. Feed it a binary, get `<binary>.cfg` as output.
Feed it a binary, get `<binary>.cfg` as output.
Use `--subs-only` to extract only functions reachable from the entry point through the call graph — skips unreachable exports and prolog candidates.
---
Example:
@@ -415,5 +416,6 @@ cmake --build build --config Release
| | Exports | YES |
| | `call` targets | YES |
| | Prolog scanning (`push rbp`, CET `endbr64`) | YES |
| **Subs-only mode** | `--subs-only` flag | YES |