Add support for aarch64-unknown-linux-pauthtest target#1713
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aarch64-unknown-linux-pauthtest target
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Although the parent change (introduction of aarch64-unknown-linux-pauthtest) has not landed yet, it seems this should not prevent this PR from being marked as ready for review. |
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@davidtwco, @folkertdev, @tgross35, @madsmtm FWI this is a follow up to rust-lang/rust#155722 |
`cc-rs` only builds static libraries, while `pauthtest` requires shared objects.
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Thanks lgtm, just waiting for others to double check
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This PR adds support for
aarch64-unknown-linux-pauthtest, a target that enables Pointer Authentication Code (PAC) support in Rust on AArch64 ELF based Linux systems. It uses theaarch64-unknown-linux-pauthtestLLVM target and a pointer-authentication-enabled sysroot with a custom musl as a reference libc implementation. Dynamic linking is required, with a dynamic linker acting as the ELF interpreter that can resolve pauth relocations and enforce pointer authentication constraints.Please note, that while
cc-rsis able to compile c/c++ sources and link against the target binary successfully this is not sufficient foraarch64-unknown-linux-pauthtest. The target has a hard requirement on shared objects and dynamic linker must be used. This seems to be incompatible with the current state ofcc-rs.Please consult a rust-lang PR for the details on the target: rust-lang/rust#155722