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-rw-r--r--rust/Makefile14
-rw-r--r--rust/compiler_builtins.rs5
2 files changed, 18 insertions, 1 deletions
diff --git a/rust/Makefile b/rust/Makefile
index d7621fad5b56..8a521f2b6422 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -360,8 +360,22 @@ rust-analyzer:
$(Q)$(srctree)/scripts/generate_rust_analyzer.py $(srctree) $(objtree) \
$(RUST_LIB_SRC) > $(objtree)/rust-project.json
+redirect-intrinsics = \
+ __eqsf2 __gesf2 __lesf2 __nesf2 __unordsf2 \
+ __unorddf2 \
+ __muloti4 __multi3 \
+ __udivmodti4 __udivti3 __umodti3
+
+ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),)
+ # These intrinsics are defined for ARM64 and RISCV64
+ redirect-intrinsics += \
+ __ashrti3 \
+ __ashlti3 __lshrti3
+endif
+
$(obj)/core.o: private skip_clippy = 1
$(obj)/core.o: private skip_flags = -Dunreachable_pub
+$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym))
$(obj)/core.o: private rustc_target_flags = $(core-cfgs)
$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs $(obj)/target.json FORCE
$(call if_changed_dep,rustc_library)
diff --git a/rust/compiler_builtins.rs b/rust/compiler_builtins.rs
index f8f39a3e6855..43378357ece9 100644
--- a/rust/compiler_builtins.rs
+++ b/rust/compiler_builtins.rs
@@ -28,7 +28,7 @@ macro_rules! define_panicking_intrinsics(
($reason: tt, { $($ident: ident, )* }) => {
$(
#[doc(hidden)]
- #[no_mangle]
+ #[export_name = concat!("__rust", stringify!($ident))]
pub extern "C" fn $ident() {
panic!($reason);
}
@@ -61,3 +61,6 @@ define_panicking_intrinsics!("`u128` should not be used", {
__udivti3,
__umodti3,
});
+
+// NOTE: if you are adding a new intrinsic here, you should also add it to
+// `redirect-intrinsics` in `rust/Makefile`.