1 files changed, 150 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/frame-base.c b/contrib/gdb/gdb/frame-base.c
new file mode 100644
index 0000000..66a0106
--- /dev/null
+++ b/contrib/gdb/gdb/frame-base.c
@@ -0,0 +1,150 @@
+/* Definitions for frame address handler, 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-base.h"
+#include "frame.h"
+
+/* A default frame base implementations.  If it wasn't for the old
+   DEPRECATED_FRAME_LOCALS_ADDRESS and DEPRECATED_FRAME_ARGS_ADDRESS,
+   these could be combined into a single function.  All architectures
+   really need to override this.  */
+
+static CORE_ADDR
+default_frame_base_address (struct frame_info *next_frame, void **this_cache)
+{
+  struct frame_info *this_frame = get_prev_frame (next_frame);
+  return get_frame_base (this_frame); /* sigh! */
+}
+
+static CORE_ADDR
+default_frame_locals_address (struct frame_info *next_frame, void **this_cache)
+{
+  if (DEPRECATED_FRAME_LOCALS_ADDRESS_P ())
+    {
+      /* This is bad.  The computation of per-frame locals address
+	 should use a per-frame frame-base.  */
+      struct frame_info *this_frame = get_prev_frame (next_frame);
+      return DEPRECATED_FRAME_LOCALS_ADDRESS (this_frame);
+    }
+  return default_frame_base_address (next_frame, this_cache);
+}
+
+static CORE_ADDR
+default_frame_args_address (struct frame_info *next_frame, void **this_cache)
+{
+  if (DEPRECATED_FRAME_ARGS_ADDRESS_P ())
+    {
+      struct frame_info *this_frame = get_prev_frame (next_frame);
+      return DEPRECATED_FRAME_ARGS_ADDRESS (this_frame);
+    }
+  return default_frame_base_address (next_frame, this_cache);
+}
+
+const struct frame_base default_frame_base = {
+  NULL, /* No parent.  */
+  default_frame_base_address,
+  default_frame_locals_address,
+  default_frame_args_address
+};
+
+static struct gdbarch_data *frame_base_data;
+
+struct frame_base_table
+{
+  frame_base_sniffer_ftype **sniffer;
+  const struct frame_base *default_base;
+  int nr;
+};
+
+static void *
+frame_base_init (struct gdbarch *gdbarch)
+{
+  struct frame_base_table *table = XCALLOC (1, struct frame_base_table);
+  table->default_base = &default_frame_base;
+  return table;
+}
+
+static struct frame_base_table *
+frame_base_table (struct gdbarch *gdbarch)
+{
+  struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data);
+  if (table == NULL)
+    {
+      /* ULGH, called during architecture initialization.  Patch
+         things up.  */
+      table = frame_base_init (gdbarch);
+      set_gdbarch_data (gdbarch, frame_base_data, table);
+    }
+  return table;
+}
+
+/* Append a predicate to the end of the table.  */
+static void
+append_predicate (struct frame_base_table *table,
+		  frame_base_sniffer_ftype *sniffer)
+{
+  table->sniffer = xrealloc (table->sniffer,
+			     ((table->nr + 1)
+			      * sizeof (frame_base_sniffer_ftype *)));
+  table->sniffer[table->nr] = sniffer;
+  table->nr++;
+}
+
+void
+frame_base_append_sniffer (struct gdbarch *gdbarch,
+			   frame_base_sniffer_ftype *sniffer)
+{
+  struct frame_base_table *table = frame_base_table (gdbarch);
+  append_predicate (table, sniffer);
+}
+
+void
+frame_base_set_default (struct gdbarch *gdbarch,
+			const struct frame_base *default_base)
+{
+  struct frame_base_table *table = frame_base_table (gdbarch);
+  table->default_base = default_base;
+}
+
+const struct frame_base *
+frame_base_find_by_frame (struct frame_info *next_frame)
+{
+  struct gdbarch *gdbarch = get_frame_arch (next_frame);
+  struct frame_base_table *table = frame_base_table (gdbarch);
+  int i;
+  for (i = 0; i < table->nr; i++)
+    {
+      const struct frame_base *desc = NULL;
+      desc = table->sniffer[i] (next_frame);
+      if (desc != NULL)
+	return desc;
+    }
+  return table->default_base;
+}
+
+extern initialize_file_ftype _initialize_frame_base; /* -Wmissing-prototypes */
+
+void
+_initialize_frame_base (void)
+{
+  frame_base_data = register_gdbarch_data (frame_base_init);
+}