64 lines
1.7 KiB
Markdown
64 lines
1.7 KiB
Markdown
OCTOPUS
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---
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Samuel AUBERTIN - EURECOM - 2022
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**OCTOPUS** is a [Spectre](https://spectreattack.com/spectre.pdf) V1 (_Bounds Check Bypass_) + V2 (_Branch Target Injection_) compiler flag tester.
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It measures the success rate of the attacks using different compilers:
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- GCC
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- CLANG
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And compilation/linking flags such as:
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- Optimisation levels (```-O```)
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- Static/dynamic linking
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- Masking and lfence as mitigation against Spectre V1
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- RETPOLINE as mitigation against Spectre V2
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## Results
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Results are stored as JSON objects in an unique file for each run, following this pattern: ```result-$(UUID).json```
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## Dependencies
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- ```clang``` and ```lld```
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- ```gcc```
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- ```sftp```
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- ```uuid```
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- The libC static symbols: ```glibc-static```
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## Execution
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Will build, execute and upload the results.
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```make```
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### Build only
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```make [-j XXX] build``` where ```XXX``` is the number of parallel processes.
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## Results aggregation
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Results are automatically uploaded to a server with a dedicated account using ```sftp```.
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Here is an exhaustive list of the data sent:
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- CPU model name and microcode version.
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- Kernel version and compilation date.
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- GCC and clang versions.
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- The list of mitigations enabled at runtime.
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- The cache timings of the processor computed by the ```calibrate_threshold()``` function.
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- Each spectre execution success rate.
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**NONE** of this data will be used for anyhting else except this experiment.
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## References
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Both implementations are heavily inspired by:
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- [ErikAugust gist](https://gist.github.com/ErikAugust/724d4a969fb2c6ae1bbd7b2a9e3d4bb6)
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- [genua GmbH PoC](https://github.com/genua/meltdown)
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