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Add cross-language LLVM CFI support to the Rust compiler #105452

Merged
merged 2 commits into from
May 4, 2023
Merged

Add cross-language LLVM CFI support to the Rust compiler #105452

merged 2 commits into from
May 4, 2023

Commits on May 3, 2023

  1. Add cross-language LLVM CFI support to the Rust compiler 

    This commit adds cross-language LLVM Control Flow Integrity (CFI)
support to the Rust compiler by adding the
`-Zsanitizer-cfi-normalize-integers` option to be used with Clang
`-fsanitize-cfi-icall-normalize-integers` for normalizing integer types
(see https://reviews.llvm.org/D139395).

It provides forward-edge control flow protection for C or C++ and Rust
-compiled code "mixed binaries" (i.e., for when C or C++ and Rust
-compiled code share the same virtual address space). For more
information about LLVM CFI and cross-language LLVM CFI support for the
Rust compiler, see design document in the tracking issue rust-lang#89653.

Cross-language LLVM CFI can be enabled with -Zsanitizer=cfi and
-Zsanitizer-cfi-normalize-integers, and requires proper (i.e.,
non-rustc) LTO (i.e., -Clinker-plugin-lto).
    @rcvalle
    rcvalle committed May 3, 2023
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  2. Update documentation for LLVM CFI support 

    This commit updates the documentation for the LLVM Control Flow
Integrity (CFI) support in the Rust compiler.
    @rcvalle
    rcvalle committed May 3, 2023
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