diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index 0d0d9e0759d82..aa51e9e6b06be 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -287,7 +287,6 @@
 #![feature(doc_masked)]
 #![feature(doc_notable_trait)]
 #![feature(dropck_eyepatch)]
-#![feature(exact_div)]
 #![feature(f16)]
 #![feature(f128)]
 #![feature(ffi_const)]
diff --git a/library/std/src/sys/paths/unix.rs b/library/std/src/sys/paths/unix.rs
index cee799c36c79b..756c5ec26f127 100644
--- a/library/std/src/sys/paths/unix.rs
+++ b/library/std/src/sys/paths/unix.rs
@@ -253,37 +253,14 @@ pub fn current_exe() -> io::Result<PathBuf> {
 
 #[cfg(target_os = "openbsd")]
 pub fn current_exe() -> io::Result<PathBuf> {
+    let mut path = vec![0u8; libc::PATH_MAX as usize];
     unsafe {
-        let mut mib = [libc::CTL_KERN, libc::KERN_PROC_ARGS, libc::getpid(), libc::KERN_PROC_ARGV];
-        let mib = mib.as_mut_ptr();
-
-        // Determine the required size (in bytes) for the argument array ...
-        let mut argv_size = 0;
-        cvt(libc::sysctl(mib, 4, ptr::null_mut(), &mut argv_size, ptr::null_mut(), 0))?;
-
-        // ... allocate a buffer for it ...
-        let argc = argv_size.div_exact(size_of::<*const libc::c_char>()).unwrap();
-        let mut argv = Vec::<*const libc::c_char>::with_capacity(argc);
-
-        // ... and retrieve the argument array.
-        cvt(libc::sysctl(mib, 4, argv.as_mut_ptr() as *mut _, &mut argv_size, ptr::null_mut(), 0))?;
-        let argc = argv_size.div_exact(size_of::<*const libc::c_char>()).unwrap();
-        argv.set_len(argc);
-
-        if argv[0].is_null() {
-            return Err(io::const_error!(io::ErrorKind::Uncategorized, "no current exe available"));
-        }
-        let argv0 = CStr::from_ptr(argv[0]).to_bytes();
-        if argv0.iter().any(|b| *b == b'/') {
-            // The program name is path-like, so try to canonicalize it.
-            crate::fs::canonicalize(OsStr::from_bytes(argv0))
-        } else {
-            // The program was probably found in the PATH. Instead of trying to
-            // find it again (which might not succeed if PATH has changed), just
-            // return the program name – this function is best-effort anyway.
-            Ok(PathBuf::from(OsStr::from_bytes(argv0)))
-        }
+        cvt(libc::getexecpath(path.as_mut_ptr().cast(), path.len()))?;
+        // SAFETY: getexecpath(3) NUL-terminates the buffer on success.
+        let len = CStr::from_ptr(path.as_ptr().cast()).count_bytes();
+        path.truncate(len);
     }
+    Ok(PathBuf::from(OsString::from_vec(path)))
 }
 
 #[cfg(any(