Merge nptl branch tree with trunk.

Step 8: add xtensa, cris and avr32 architecture dependent
files, as is.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/avr32/clone.c b/libc/sysdeps/linux/avr32/clone.c
new file mode 100644
index 000000000..c5f5a74a8
--- /dev/null
+++ b/libc/sysdeps/linux/avr32/clone.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2004 Atmel Corporation
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License.  See the file "COPYING.LIB" in the main directory of this
+ * archive for more details.
+ */
+#include <errno.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+/*
+ * I don't know if we can be absolutely certain that the fn and arg
+ * parameters are preserved when returning as the child. If the
+ * compiler stores them in registers (r0-r7), they should be.
+ */
+int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg)
+{
+       register int (*_fn)(void *arg) = fn;
+       register void *_arg = arg;
+       int err;
+
+       /* Sanity check the arguments */
+       err = -EINVAL;
+       if (!fn)
+               goto syscall_error;
+       if (!child_stack)
+               goto syscall_error;
+
+       err = INLINE_SYSCALL(clone, 2, flags, child_stack);
+       if (err < 0)
+               goto syscall_error;
+       else if (err != 0)
+               return err;
+
+       _exit(_fn(_arg));
+
+syscall_error:
+       __set_errno (-err);
+       return -1;
+}