From 65698ae9f30f5ad72224edd1884fb4ddd1279366 Mon Sep 17 00:00:00 2001 From: Ramon de C Valle Date: Mon, 21 Nov 2022 21:29:00 -0800 Subject: Add LLVM KCFI support to the Rust compiler This commit adds LLVM Kernel Control Flow Integrity (KCFI) support to the Rust compiler. It initially provides forward-edge control flow protection for operating systems kernels for Rust-compiled code only by aggregating function pointers in groups identified by their return and parameter types. (See llvm/llvm-project@cff5bef.) 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) will be provided in later work as part of this project by identifying C char and integer type uses at the time types are encoded (see Type metadata in the design document in the tracking issue #89653). LLVM KCFI can be enabled with -Zsanitizer=kcfi. Co-authored-by: bjorn3 <17426603+bjorn3@users.noreply.github.com> --- compiler/rustc_codegen_ssa/src/traits/type_.rs | 1 + 1 file changed, 1 insertion(+) (limited to 'compiler/rustc_codegen_ssa/src') diff --git a/compiler/rustc_codegen_ssa/src/traits/type_.rs b/compiler/rustc_codegen_ssa/src/traits/type_.rs index 86481d5d758..109161ccc83 100644 --- a/compiler/rustc_codegen_ssa/src/traits/type_.rs +++ b/compiler/rustc_codegen_ssa/src/traits/type_.rs @@ -122,6 +122,7 @@ pub trait LayoutTypeMethods<'tcx>: Backend<'tcx> { pub trait TypeMembershipMethods<'tcx>: Backend<'tcx> { fn set_type_metadata(&self, function: Self::Function, typeid: String); fn typeid_metadata(&self, typeid: String) -> Self::Value; + fn set_kcfi_type_metadata(&self, function: Self::Function, typeid: u32); } pub trait ArgAbiMethods<'tcx>: HasCodegen<'tcx> { -- cgit 1.4.1-3-g733a5