1 files changed, 62 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i960/clone.S b/libc/sysdeps/linux/i960/clone.S
new file mode 100644
index 000000000..e6d504bb7
--- /dev/null
+++ b/libc/sysdeps/linux/i960/clone.S
@@ -0,0 +1,62 @@
+#
+# clone.S, part of the i960 support for the uClibc library.
+#
+# Copyright (C) 2002 by Okiok Data Ltd.  http://www.okiok.com/
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Library General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option) any
+# later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Library General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# at 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# Derived from an old port of uC-libc to the i960 by Keith Adams (kma@cse.ogi.edu).
+#
+
+#include <sys/syscall.h>        
+#include <bits/errno.h>
+        
+/* clone is even more special than fork as it mucks with stacks
+   and invokes a function in the right context after its all over.  */
+        
+/* int _clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+
+        .globl __clone
+__clone: 
+        /* set up new stack image in regs r4-r7; argument will be in r3 in child.  */
+        ldconst 0, r4                   /* pfp == 0 */
+        addo    16, g1, r5              /* sp == newfp + 16 */
+        mov     g0, r6                  /* rip == fnc */
+        mov     g2, r7
+        stq     r4, (g1)
+
+        addo    sp, 4, sp
+        st      g10, -4(sp)
+        mov     sp, g10
+        ldconst __NR_clone, g13
+        calls   0
+
+        /* Do the system call */
+        cmpibg  0, g0, syscall_error    /* if < 0, error */
+        be      thread_start            /* if == 0, we're the child */
+        ret                             /* we're the parent */
+
+syscall_error:
+        not     g0, r3
+        callx   ___errno_location
+        st      r3, (g0)
+        ret
+
+thread_start:
+        # our new pfp is in g1; here we go
+        flushreg
+        mov     g1, pfp
+        flushreg
+        ret