Rename: src/setjmp.c -> src/setjmp/setjmp.c

(Logical change 1.290)

src/setjmp/setjmp.c

@@ -0,0 +1,49 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <libunwind.h>
+#include <setjmp.h>
+
+#include "jmpbuf.h"
+
+/* Why use K&R syntax here?  setjmp() is often a macro and that
+   expands into a call to, say, __setjmp() and we need to define the
+   libunwind-version of setjmp() with the name of the actual function.
+   Using K&R syntax lets us keep the setjmp() macro while keeping the
+   syntax valid...  This trick works provided setjmp() doesn't do
+   anything other than a function call.  */
+
+int
+setjmp (env)
+     jmp_buf env;
+{
+  void **wp = (void **) env;
+
+  /* this should work on most platforms, but may not be
+     performance-optimal; check the code! */
+  wp[JB_SP] = __builtin_frame_address (0);
+  wp[JB_RP] = (void *) __builtin_return_address (0);
+  return 0;
+}