5 files changed, 9 insertions, 9 deletions
diff --git a/library/panic_unwind/src/emcc.rs b/library/panic_unwind/src/emcc.rs
index 9127449edb1..0bb256f0eb8 100644
--- a/library/panic_unwind/src/emcc.rs
+++ b/library/panic_unwind/src/emcc.rs
@@ -21,7 +21,7 @@ struct TypeInfo {
 }
 unsafe impl Sync for TypeInfo {}
 
-extern "C" {
+unsafe extern "C" {
     // The leading `\x01` byte here is actually a magical signal to LLVM to
     // *not* apply any other mangling like prefixing with a `_` character.
     //
@@ -116,7 +116,7 @@ extern "C" fn exception_cleanup(ptr: *mut libc::c_void) -> *mut libc::c_void {
     }
 }
 
-extern "C" {
+unsafe extern "C" {
     fn __cxa_allocate_exception(thrown_size: libc::size_t) -> *mut libc::c_void;
     fn __cxa_begin_catch(thrown_exception: *mut libc::c_void) -> *mut libc::c_void;
     fn __cxa_end_catch();
diff --git a/library/panic_unwind/src/hermit.rs b/library/panic_unwind/src/hermit.rs
index 7e08ad66577..9719c133415 100644
--- a/library/panic_unwind/src/hermit.rs
+++ b/library/panic_unwind/src/hermit.rs
@@ -6,14 +6,14 @@ use alloc::boxed::Box;
 use core::any::Any;
 
 pub(crate) unsafe fn cleanup(_ptr: *mut u8) -> Box<dyn Any + Send> {
-    extern "C" {
+    unsafe extern "C" {
         fn __rust_abort() -> !;
     }
     __rust_abort();
 }
 
 pub(crate) unsafe fn panic(_data: Box<dyn Any + Send>) -> u32 {
-    extern "C" {
+    unsafe extern "C" {
         fn __rust_abort() -> !;
     }
     __rust_abort();
diff --git a/library/panic_unwind/src/lib.rs b/library/panic_unwind/src/lib.rs
index d6828164195..45e2a466b4d 100644
--- a/library/panic_unwind/src/lib.rs
+++ b/library/panic_unwind/src/lib.rs
@@ -75,7 +75,7 @@ cfg_if::cfg_if! {
     }
 }
 
-extern "C" {
+unsafe extern "C" {
     /// Handler in std called when a panic object is dropped outside of
     /// `catch_unwind`.
     fn __rust_drop_panic() -> !;
diff --git a/library/panic_unwind/src/miri.rs b/library/panic_unwind/src/miri.rs
index a86f0e91eef..ec48b1105ab 100644
--- a/library/panic_unwind/src/miri.rs
+++ b/library/panic_unwind/src/miri.rs
@@ -7,7 +7,7 @@ use core::any::Any;
 // Must be pointer-sized.
 type Payload = Box<Box<dyn Any + Send>>;
 
-extern "Rust" {
+unsafe extern "Rust" {
     /// Miri-provided extern function to begin unwinding.
     fn miri_start_unwind(payload: *mut u8) -> !;
 }
diff --git a/library/panic_unwind/src/seh.rs b/library/panic_unwind/src/seh.rs
index 21bfe74e1a2..c8dfddf821e 100644
--- a/library/panic_unwind/src/seh.rs
+++ b/library/panic_unwind/src/seh.rs
@@ -135,7 +135,7 @@ mod imp {
     #[derive(Copy, Clone)]
     pub(super) struct ptr_t(u32);
 
-    extern "C" {
+    unsafe extern "C" {
         static __ImageBase: u8;
     }
 
@@ -229,7 +229,7 @@ static mut CATCHABLE_TYPE: _CatchableType = _CatchableType {
     copyFunction: ptr_t::null(),
 };
 
-extern "C" {
+unsafe extern "C" {
     // The leading `\x01` byte here is actually a magical signal to LLVM to
     // *not* apply any other mangling like prefixing with a `_` character.
     //
@@ -343,7 +343,7 @@ pub(crate) unsafe fn panic(data: Box<dyn Any + Send>) -> u32 {
         ptr_t::new(exception_copy as *mut u8).raw(),
     );
 
-    extern "system-unwind" {
+    unsafe extern "system-unwind" {
         fn _CxxThrowException(pExceptionObject: *mut c_void, pThrowInfo: *mut u8) -> !;
     }