Index: lib/Support/Unix/Path.inc
===================================================================
--- lib/Support/Unix/Path.inc
+++ lib/Support/Unix/Path.inc
@@ -48,6 +48,9 @@
 #ifdef __APPLE__
 #include <mach-o/dyld.h>
 #endif
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
+#include <sys/sysctl.h>
+#endif
 
 // Both stdio.h and cstdio are included via different pathes and
 // stdcxx's cstdio doesn't include stdio.h, so it doesn't #undef the macros
@@ -161,9 +164,19 @@
     if (realpath(exe_path, link_path))
       return link_path;
   }
-#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
-      defined(__OpenBSD__) || defined(__minix) || defined(__DragonFly__) || \
-      defined(__FreeBSD_kernel__)
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
+      defined(__NetBSD__)
+  char exe_path[MAXPATHLEN];
+  size_t len = sizeof(exe_path);
+  int name[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME };
+
+  name[3] = getpid();
+  if (sysctl(name, 4, exe_path, &len, NULL, 0) == 0)
+    return exe_path;
+  else if (argv0 != nullptr && getprogpath(exe_path, argv0) != nullptr)
+    return exe_path;
+#elif defined(__Bitrig__) || defined(__OpenBSD__) || defined(__minix) || \
+      defined(__DragonFly__)
   char exe_path[PATH_MAX];
 
   if (getprogpath(exe_path, argv0) != NULL)