1 files changed, 99 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/frame-unwind.c b/contrib/gdb/gdb/frame-unwind.c
new file mode 100644
index 0000000..82eaf7c
--- /dev/null
+++ b/contrib/gdb/gdb/frame-unwind.c
@@ -0,0 +1,99 @@
+/* Definitions for frame unwinder, for GDB, the GNU debugger.
+
+   Copyright 2003 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "defs.h"
+#include "frame.h"
+#include "frame-unwind.h"
+#include "gdb_assert.h"
+#include "dummy-frame.h"
+
+static struct gdbarch_data *frame_unwind_data;
+
+struct frame_unwind_table
+{
+  frame_unwind_sniffer_ftype **sniffer;
+  int nr;
+};
+
+/* Append a predicate to the end of the table.  */
+static void
+append_predicate (struct frame_unwind_table *table,
+		  frame_unwind_sniffer_ftype *sniffer)
+{
+  table->sniffer = xrealloc (table->sniffer, ((table->nr + 1)
+					      * sizeof (frame_unwind_sniffer_ftype *)));
+  table->sniffer[table->nr] = sniffer;
+  table->nr++;
+}
+
+static void *
+frame_unwind_init (struct gdbarch *gdbarch)
+{
+  struct frame_unwind_table *table = XCALLOC (1, struct frame_unwind_table);
+  append_predicate (table, dummy_frame_sniffer);
+  return table;
+}
+
+void
+frame_unwind_append_sniffer (struct gdbarch *gdbarch,
+			     frame_unwind_sniffer_ftype *sniffer)
+{
+  struct frame_unwind_table *table =
+    gdbarch_data (gdbarch, frame_unwind_data);
+  if (table == NULL)
+    {
+      /* ULGH, called during architecture initialization.  Patch
+         things up.  */
+      table = frame_unwind_init (gdbarch);
+      set_gdbarch_data (gdbarch, frame_unwind_data, table);
+    }
+  append_predicate (table, sniffer);
+}
+
+const struct frame_unwind *
+frame_unwind_find_by_frame (struct frame_info *next_frame)
+{
+  int i;
+  struct gdbarch *gdbarch = get_frame_arch (next_frame);
+  struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
+  if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES && legacy_frame_p (gdbarch))
+    /* Seriously old code.  Don't even try to use this new mechanism.
+       (Note: The variable USE_GENERIC_DUMMY_FRAMES is deprecated, not
+       the dummy frame mechanism.  All architectures should be using
+       generic dummy frames).  */
+    return legacy_saved_regs_unwind;
+  for (i = 0; i < table->nr; i++)
+    {
+      const struct frame_unwind *desc;
+      desc = table->sniffer[i] (next_frame);
+      if (desc != NULL)
+	return desc;
+    }
+  return legacy_saved_regs_unwind;
+}
+
+extern initialize_file_ftype _initialize_frame_unwind; /* -Wmissing-prototypes */
+
+void
+_initialize_frame_unwind (void)
+{
+  frame_unwind_data = register_gdbarch_data (frame_unwind_init);
+}