Initial revision
diff --git a/src/lib9/ffork-FreeBSD.c b/src/lib9/ffork-FreeBSD.c
new file mode 100644
index 0000000..a7c82e6
--- /dev/null
+++ b/src/lib9/ffork-FreeBSD.c
@@ -0,0 +1,33 @@
+#include <lib9.h>
+
+extern int __isthreaded;
+int
+ffork(int flags, void(*fn)(void*), void *arg)
+{
+ void *p;
+
+ __isthreaded = 1;
+ p = malloc(16384);
+ if(p == nil)
+ return -1;
+ memset(p, 0xFE, 16384);
+ return rfork_thread(RFPROC|flags, (char*)p+16000, (int(*)(void*))fn, arg);
+}
+
+/*
+ * For FreeBSD libc.
+ */
+
+typedef struct {
+ volatile long access_lock;
+ volatile long lock_owner;
+ volatile char *fname;
+ volatile int lineno;
+} spinlock_t;
+
+void
+_spinlock(spinlock_t *lk)
+{
+ lock((Lock*)&lk->access_lock);
+}
+
