1 files changed, 67 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/int_util.c b/compiler-rt/lib/builtins/int_util.c
new file mode 100644
index 000000000000..226a6e93440d
--- /dev/null
+++ b/compiler-rt/lib/builtins/int_util.c
@@ -0,0 +1,67 @@
+//===-- int_util.c - Implement internal utilities -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// NOTE: The definitions in this file are declared weak because we clients to be
+// able to arbitrarily package individual functions into separate .a files. If
+// we did not declare these weak, some link situations might end up seeing
+// duplicate strong definitions of the same symbol.
+//
+// We can't use this solution for kernel use (which may not support weak), but
+// currently expect that when built for kernel use all the functionality is
+// packaged into a single library.
+
+#ifdef KERNEL_USE
+
+NORETURN extern void panic(const char *, ...);
+#ifndef _WIN32
+__attribute__((visibility("hidden")))
+#endif
+void __compilerrt_abort_impl(const char *file, int line, const char *function) {
+  panic("%s:%d: abort in %s", file, line, function);
+}
+
+#elif __APPLE__
+
+// from libSystem.dylib
+NORETURN extern void __assert_rtn(const char *func, const char *file, int line,
+                                  const char *message);
+
+#ifndef _WIN32
+__attribute__((weak))
+__attribute__((visibility("hidden")))
+#endif
+void __compilerrt_abort_impl(const char *file, int line, const char *function) {
+  __assert_rtn(function, file, line, "libcompiler_rt abort");
+}
+
+#elif __Fuchsia__
+
+#ifndef _WIN32
+__attribute__((weak))
+__attribute__((visibility("hidden")))
+#endif
+void __compilerrt_abort_impl(const char *file, int line, const char *function) {
+  __builtin_trap();
+}
+
+#else
+
+// Get the system definition of abort()
+#include <stdlib.h>
+
+#ifndef _WIN32
+__attribute__((weak))
+__attribute__((visibility("hidden")))
+#endif
+void __compilerrt_abort_impl(const char *file, int line, const char *function) {
+  abort();
+}
+
+#endif