llvm-project

65749188 - [libc][linux] add support to parse PT_GNU_PROPERTY (#174772)

[libc][linux] add support to parse PT_GNU_PROPERTY (#174772) In order to add Control-flow Enforcement Technology (CET) Shadow Stack (SHSTK) support, we need to parse the `PT_GNU_PROPERTY` program header and the corresponding section to evaluate if the binary being started was compiled with the necessary support. PS: This is my first PR to llvm-libc, I might have made obvious styling mistakes so I'd appreciate any feedback or suggestions to improve it. I have a prototype branch using this change to enable SHSTK support: https://github.com/jakos-sec/llvm-project/tree/add-shstk-support