ARC port to uClibc

For this port, I would like to give due credit to:

- Folks from Codito technologies (Sameer, Amit, Kanika, Ramana,...)
   who did the very first port

- ARC UK from 2007-2009 (Joern, Irfan, Khurram, Phil...

- Late Brendan Kehoe (may he RIP)

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/arc/bsd-setjmp.S b/libc/sysdeps/linux/arc/bsd-setjmp.S
new file mode 100644
index 000000000..46745958e
--- /dev/null
+++ b/libc/sysdeps/linux/arc/bsd-setjmp.S
@@ -0,0 +1,20 @@
+/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'.  ARC version.
+ *
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+/* This just does a tail-call to `__sigsetjmp (ARG, 1)'.
+   We cannot do it in C because it must be a tail-call, so frame-unwinding
+   in setjmp doesn't clobber the state restored by longjmp.  */
+
+#include <sysdep.h>
+
+;@ r0 = jump buffer into which regs will be saved
+
+ENTRY(setjmp)
+	b.d	__sigsetjmp
+	mov	r1, 1		; save signals
+END(setjmp)
+libc_hidden_def(setjmp)