bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Auto merge of #89652 - rcvalle:rust-cfi, r=nagisa

Browse source 
Add LLVM CFI support to the Rust compiler

This PR adds LLVM Control Flow Integrity (CFI) support to the Rust compiler. It initially provides forward-edge control flow protection for Rust-compiled code only by aggregating function pointers in groups identified by their number of arguments.

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 defining and using compatible type identifiers (see Type metadata in the design document in the tracking issue #89653).

LLVM CFI can be enabled with -Zsanitizer=cfi and requires LTO (i.e., -Clto).

Thank you, `@eddyb` and `@pcc,` for all the help!
This commit is contained in:
bors 2021-10-27 09:19:42 +00:00
commit a8f6e614f8
35 changed files with 473 additions and 39 deletions
Download patch file Download diff file Expand all files Collapse all files

4
compiler/rustc_target/src/spec/mod.rs
View file

@ -602,6 +602,7 @@ bitflags::bitflags! {
const MEMORY = 1 << 2;
const THREAD = 1 << 3;
const HWADDRESS = 1 << 4;
const CFI = 1 << 5;
}
}
@ -612,6 +613,7 @@ impl SanitizerSet {
fn as_str(self) -> Option<&'static str> {
Some(match self {
SanitizerSet::ADDRESS => "address",
SanitizerSet::CFI => "cfi",
SanitizerSet::LEAK => "leak",
SanitizerSet::MEMORY => "memory",
SanitizerSet::THREAD => "thread",
@ -644,6 +646,7 @@ impl IntoIterator for SanitizerSet {
fn into_iter(self) -> Self::IntoIter {
[
SanitizerSet::ADDRESS,
SanitizerSet::CFI,
SanitizerSet::LEAK,
SanitizerSet::MEMORY,
SanitizerSet::THREAD,
@ -1804,6 +1807,7 @@ impl Target {
for s in a {
base.$key_name |= match s.as_string() {
Some("address") => SanitizerSet::ADDRESS,
Some("cfi") => SanitizerSet::CFI,
Some("leak") => SanitizerSet::LEAK,
Some("memory") => SanitizerSet::MEMORY,
Some("thread") => SanitizerSet::THREAD,