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

Add -Zfunction-return={keep,thunk-extern} option

Browse source 
This is intended to be used for Linux kernel RETHUNK builds.

With this commit (optionally backported to Rust 1.73.0), plus a
patched Linux kernel to pass the flag, I get a RETHUNK build with
Rust enabled that is `objtool`-warning-free and is able to boot in
QEMU and load a sample Rust kernel module.

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Miguel Ojeda 2023-10-18 16:58:17 +02:00
parent d3c9964c20
commit 2d476222e8
17 changed files with 215 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

10
compiler/rustc_interface/src/tests.rs
View file

@ -5,10 +5,11 @@ use rustc_errors::{emitter::HumanReadableErrorType, registry, ColorConfig};
use rustc_session::config::{
build_configuration, build_session_options, rustc_optgroups, BranchProtection, CFGuard, Cfg,
DebugInfo, DumpMonoStatsFormat, ErrorOutputType, ExternEntry, ExternLocation, Externs,
InliningThreshold, Input, InstrumentCoverage, InstrumentXRay, LinkSelfContained,
LinkerPluginLto, LocationDetail, LtoCli, MirSpanview, OomStrategy, Options, OutFileName,
OutputType, OutputTypes, PAuthKey, PacRet, Passes, Polonius, ProcMacroExecutionStrategy, Strip,
SwitchWithOptPath, SymbolManglingVersion, TraitSolver, WasiExecModel,
FunctionReturn, InliningThreshold, Input, InstrumentCoverage, InstrumentXRay,
LinkSelfContained, LinkerPluginLto, LocationDetail, LtoCli, MirSpanview, OomStrategy, Options,
OutFileName, OutputType, OutputTypes, PAuthKey, PacRet, Passes, Polonius,
ProcMacroExecutionStrategy, Strip, SwitchWithOptPath, SymbolManglingVersion, TraitSolver,
WasiExecModel,
};
use rustc_session::lint::Level;
use rustc_session::search_paths::SearchPath;
@ -758,6 +759,7 @@ fn test_unstable_options_tracking_hash() {
tracked!(flatten_format_args, false);
tracked!(force_unstable_if_unmarked, true);
tracked!(fuel, Some(("abc".to_string(), 99)));
tracked!(function_return, FunctionReturn::ThunkExtern);
tracked!(function_sections, Some(false));
tracked!(human_readable_cgu_names, true);
tracked!(incremental_ignore_spans, true);