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Diffstat (limited to 'libc/sysdeps/linux/bfin/clone.c')
-rw-r--r--libc/sysdeps/linux/bfin/clone.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/bfin/clone.c b/libc/sysdeps/linux/bfin/clone.c
new file mode 100644
index 000000000..746da8e22
--- /dev/null
+++ b/libc/sysdeps/linux/bfin/clone.c
@@ -0,0 +1,39 @@
+/*
+ * libc/sysdeps/linux/bfin/clone.c -- `clone' syscall for linux/blackfin
+ *
+ *
+ * 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 <asm/unistd.h>
+
+int
+clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg)
+{
+ register long rval = -1;
+
+ if (fn && child_stack) {
+
+ __asm__ __volatile__ (
+ "r1 = %2;"
+ "r0 = %3;"
+ "P0 = %1;"
+ "excpt 0;" /*Call sys_clone*/
+ "%0 = r0;"
+ "cc = r0 == 0;"
+ "if !cc jump xxx;" /* if (rval != 0) skip to parent */
+ "r0 = %4;"
+ "p0 = %5;"
+ "call (p0);" /* Call cloned function */
+ "p0 = %6;"
+ "excpt 0;" /* Call sys_exit */
+ "xxx: nop;"
+ : "=d" (rval)
+ : "i" (__NR_clone), "a" (child_stack), "a" (flags), "a" (arg), "a" (fn), "i" (__NR_exit)
+ : "CC", "R0", "R1", "P0");
+ }
+ return rval;
+}