diff --git a/compiler-rt/lib/builtins/clear_cache.c b/compiler-rt/lib/builtins/clear_cache.c
--- a/compiler-rt/lib/builtins/clear_cache.c
+++ b/compiler-rt/lib/builtins/clear_cache.c
@@ -91,12 +91,17 @@
 #else
   compilerrt_abort();
 #endif
-#elif defined(__linux__) && defined(__mips__)
+#elif defined(__mips__)
   const uintptr_t start_int = (uintptr_t)start;
   const uintptr_t end_int = (uintptr_t)end;
-  syscall(__NR_cacheflush, start, (end_int - start_int), BCACHE);
-#elif defined(__mips__) && defined(__OpenBSD__)
-  cacheflush(start, (uintptr_t)end - (uintptr_t)start, BCACHE);
+  uintptr_t synci_step;
+  __asm__ __volatile__("rdhwr %0, $1\n\t" : "=r"(synci_step));
+  if (synci_step != 0) {
+    for (uintptr_t p = start_int; p < end_int; p += synci_step) {
+      __asm__ __volatile__("synci 0(%0)\n\t" : : "r"(p));
+    }
+  }
+
 #elif defined(__aarch64__) && !defined(__APPLE__)
   uint64_t xstart = (uint64_t)(uintptr_t)start;
   uint64_t xend = (uint64_t)(uintptr_t)end;