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-rw-r--r--gdb/frame-base.c154
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diff --git a/gdb/frame-base.c b/gdb/frame-base.c
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+/* 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
+ FRAME_LOCALS_ADDRESS and 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)
+{
+ struct frame_info *this_frame = get_prev_frame (next_frame);
+ return FRAME_LOCALS_ADDRESS (this_frame);
+}
+
+static CORE_ADDR
+default_frame_args_address (struct frame_info *next_frame, void **this_cache)
+{
+ struct frame_info *this_frame = get_prev_frame (next_frame);
+ /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
+ that if it is unsure about the answer, it returns 0 instead of
+ guessing (this happens on the VAX and i960, for example).
+
+ On most machines, we never have to guess about the args address,
+ so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
+#ifdef FRAME_ARGS_ADDRESS_CORRECT
+ return FRAME_ARGS_ADDRESS_CORRECT (this_frame);
+#else
+ return FRAME_ARGS_ADDRESS (this_frame);
+#endif
+}
+
+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_p_ftype **p;
+ 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 void
+frame_base_free (struct gdbarch *gdbarch, void *data)
+{
+ struct frame_base_table *table =
+ gdbarch_data (gdbarch, frame_base_data);
+ xfree (table->p);
+ xfree (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_p_ftype *p)
+{
+ table->p = xrealloc (table->p, ((table->nr + 1)
+ * sizeof (frame_base_p_ftype *)));
+ table->p[table->nr] = p;
+ table->nr++;
+}
+
+void
+frame_base_append_predicate (struct gdbarch *gdbarch,
+ frame_base_p_ftype *p)
+{
+ struct frame_base_table *table = frame_base_table (gdbarch);
+ append_predicate (table, p);
+}
+
+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_pc (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ int i;
+ struct frame_base_table *table = frame_base_table (gdbarch);
+ for (i = 0; i < table->nr; i++)
+ {
+ const struct frame_base *desc = table->p[i] (pc);
+ if (desc != NULL)
+ return desc;
+ }
+ return table->default_base;
+}
+
+void
+_initialize_frame_base (void)
+{
+ frame_base_data = register_gdbarch_data (frame_base_init,
+ frame_base_free);
+}