summaryrefslogtreecommitdiff
path: root/sysdeps/unix/fork.S
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/unix/fork.S')
-rw-r--r--sysdeps/unix/fork.S32
1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/unix/fork.S b/sysdeps/unix/fork.S
new file mode 100644
index 0000000000..1c360c6ed2
--- /dev/null
+++ b/sysdeps/unix/fork.S
@@ -0,0 +1,32 @@
+/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library 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.
+
+The GNU C Library 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 the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <sysdep.h>
+
+/* This code works for at least m68k. */
+
+SYSCALL__ (fork, 0)
+ /* R1 is now 0 for the parent and 1 for the child. Decrement it to
+ make it -1 (all bits set) for the parent, and 0 (no bits set)
+ for the child. Then AND it with R0, so the parent gets
+ R0&-1==R0, and the child gets R0&0==0. */
+ subl #1, r1
+ andl r1, r0
+ ret
+
+weak_alias (__fork, fork)