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CFI: Fix SIGILL reached via trait objects

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Fix #106547 by transforming the concrete self into a reference to a
trait object before emitting type metadata identifiers for trait
methods.
This commit is contained in:
Ramon de C Valle 2023-05-03 22:22:24 +00:00
parent eac35583d2
commit 7c7b22e62c
10 changed files with 247 additions and 28 deletions
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2
compiler/rustc_codegen_llvm/src/mono_item.rs
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@ -51,7 +51,7 @@ impl<'tcx> PreDefineMethods<'tcx> for CodegenCx<'_, 'tcx> {
assert!(!instance.substs.has_infer());
let fn_abi = self.fn_abi_of_instance(instance, ty::List::empty());
let lldecl = self.declare_fn(symbol_name, fn_abi);
let lldecl = self.declare_fn(symbol_name, fn_abi, Some(instance));
unsafe { llvm::LLVMRustSetLinkage(lldecl, base::linkage_to_llvm(linkage)) };
let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
base::set_link_section(lldecl, attrs);