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54 lines
2.3 KiB
Rust
54 lines
2.3 KiB
Rust
// ignore-tidy-linelength
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//! A basic smoke test to check for GNU Property Note to see that for `x86_64` targets when [`-Z
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//! cf-protection=branch`][intel-cet-tracking-issue] is requested, that the
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//!
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//! ```text
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//! NT_GNU_PROPERTY_TYPE_0 Properties: x86 feature: IBT
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//! ```
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//!
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//! Intel Indirect Branch Tracking (IBT) property is emitted. This was generated in
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//! <https://github.com/rust-lang/rust/pull/110304> in order to address
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//! <https://github.com/rust-lang/rust/issues/103001>.
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//!
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//! Note that the precompiled std currently is not compiled with `-Z cf-protection=branch`!
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//!
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//! In particular, it is expected that:
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//!
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//! > IBT to only be enabled for the process if `.note.gnu.property` indicates that the executable
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//! > was compiled with IBT support and the linker to only tell that IBT is supported if all input
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//! > object files indicate that they support IBT, which in turn requires the standard library to be
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//! > compiled with IBT enabled.
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//!
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//! Note that Intel IBT (Indirect Branch Tracking) is not to be confused with Arm's BTI (Branch
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//! Target Identification). See below for link to Intel IBT docs.
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//!
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//! ## Related links
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//!
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//! - [Tracking Issue for Intel Control Enforcement Technology (CET)][intel-cet-tracking-issue]
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//! - Zulip question about this test:
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//! <https://rust-lang.zulipchat.com/#narrow/channel/182449-t-compiler.2Fhelp/topic/.E2.9C.94.20Branch.20protection.20and.20.60.2Enote.2Egnu.2Eproperty.60>
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//! - Intel IBT docs:
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//! <https://edc.intel.com/content/www/us/en/design/ipla/software-development-platforms/client/platforms/alder-lake-desktop/12th-generation-intel-core-processors-datasheet-volume-1-of-2/006/indirect-branch-tracking/>
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//!
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//! [intel-cet-tracking-issue]: https://github.com/rust-lang/rust/issues/93754
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//@ needs-llvm-components: x86
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// FIXME(#93754): increase the test coverage of this test.
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//@ only-x86_64-unknown-linux-gnu
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//@ ignore-cross-compile
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use run_make_support::{bare_rustc, llvm_readobj};
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fn main() {
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// `main.rs` is `#![no_std]` to not pull in the currently not-compiled-with-IBT precompiled std.
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bare_rustc()
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.input("main.rs")
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.target("x86_64-unknown-linux-gnu")
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.arg("-Zcf-protection=branch")
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.arg("-Clink-args=-nostartfiles")
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.run();
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llvm_readobj().arg("-nW").input("main").run().assert_stdout_contains(".note.gnu.property");
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}
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