deduplicate abort implementations

Currently, the code for process aborts is duplicated across `panic_abort` and `std`. This PR uses `#[rustc_std_internal_symbol]` to make the `std` implementation available to `panic_abort` via the linker, thereby deduplicating the code.

1 files changed, 8 insertions, 1 deletions

diff --git a/library/std/src/rt.rs b/library/std/src/rt.rs
index 9737b2f5bfe..b3f3b301e3d 100644
--- a/library/std/src/rt.rs
+++ b/library/std/src/rt.rs
@@ -26,6 +26,13 @@ use crate::sync::Once;
 use crate::thread::{self, main_thread};
 use crate::{mem, panic, sys};
 
+// This function is needed by the panic runtime.
+#[cfg(not(test))]
+#[rustc_std_internal_symbol]
+fn __rust_abort() {
+    crate::process::abort();
+}
+
 // Prints to the "panic output", depending on the platform this may be:
 // - the standard error output
 // - some dedicated platform specific output
@@ -47,7 +54,7 @@ macro_rules! rtabort {
     ($($t:tt)*) => {
         {
             rtprintpanic!("fatal runtime error: {}, aborting\n", format_args!($($t)*));
-            crate::sys::abort_internal();
+            crate::process::abort();
         }
     }
 }