1 files changed, 81 insertions, 0 deletions
diff --git a/libc/bionic/bionic_clone.c b/libc/bionic/bionic_clone.c
new file mode 100644
index 0000000..6b2fa58
--- /dev/null
+++ b/libc/bionic/bionic_clone.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#define __GNU_SOURCE 1
+#include <sched.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+/* WARNING: AT THE MOMENT, THIS IS ONLY SUPPORTED ON ARM
+ */
+
+extern int  __bionic_clone(unsigned long   clone_flags,
+                           void*           newsp,
+                           int            *parent_tidptr,
+                           void           *new_tls,
+                           int            *child_tidptr,
+                           int            (*fn)(void *),
+                           void          *arg);
+
+extern void _exit_thread(int  retCode);
+
+/* this function is called from the __bionic_clone
+ * assembly fragment to call the thread function
+ * then exit. */
+extern void
+__bionic_clone_entry( int (*fn)(void *), void *arg )
+{
+    int  ret = (*fn)(arg);
+    _exit_thread(ret);
+}
+
+int
+clone(int (*fn)(void *), void *child_stack, int flags, void*  arg, ...)
+{
+    va_list  args;
+    int     *parent_tidptr = NULL;
+    void    *new_tls = NULL;
+    int     *child_tidptr = NULL;
+    int     ret;
+
+    /* extract optional parameters - they are cummulative */
+    va_start(args, arg);
+    if (flags & (CLONE_PARENT_SETTID|CLONE_SETTLS|CLONE_CHILD_SETTID)) {
+        parent_tidptr = va_arg(args, int*);
+    }
+    if (flags & (CLONE_SETTLS|CLONE_CHILD_SETTID)) {
+        new_tls = va_arg(args, void*);
+    }
+    if (flags & CLONE_CHILD_SETTID) {
+        child_tidptr = va_arg(args, int*);
+    }
+    va_end(args);
+
+    ret = __bionic_clone(flags, child_stack, parent_tidptr, new_tls, child_tidptr, fn, arg);
+    return ret;
+}