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2021-06-14devtools: Fix verneed section parsing in pixieW. J. van der Laan
I misunderstood the ELF specification for version symbols (verneed): The `vn_aux` pointer is relative to the main verneed record, not the start of the section. This caused many symbols to not be versioned properly in the return value of `elf.dyn_symbols`. This was discovered in #21454. Fix it by correcting the offset computation.
2020-11-22contrib: Parse ELF directly for symbol and security checksWladimir J. van der Laan
Instead of the ever-messier text parsing of the output of the readelf tool (which is clearly meant for human consumption not to be machine parseable), parse the ELF binaries directly. Add a small dependency-less ELF parser specific to the checks. This is slightly more secure, too, because it removes potential ambiguity due to misparsing and changes in the output format of `elfread`. It also allows for stricter and more specific ELF format checks in the future. This removes the build-time dependency for `readelf`. It passes the test-security-check for me locally, though I haven't checked on all platforms.