aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/unix/arm/fork.S
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/unix/arm/fork.S')
-rw-r--r--sysdeps/unix/arm/fork.S34
1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/unix/arm/fork.S b/sysdeps/unix/arm/fork.S
new file mode 100644
index 0000000000..bd00c92cfe
--- /dev/null
+++ b/sysdeps/unix/arm/fork.S
@@ -0,0 +1,34 @@
+/* Copyright (C) 1991,92,94,95,97,2002 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+
+/* ARM version. */
+
+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. */
+ sub r1, r1, $1
+ and r0, r0, r1
+ DO_RET (r14)
+PSEUDO_END (__fork)
+libc_hidden_def (__fork)
+
+weak_alias (__fork, fork)