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- /* Definitions for frame address handler, for GDB, the GNU debugger.
- Copyright (C) 2003-2022 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 3 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, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "frame-base.h"
- #include "frame.h"
- #include "gdbsupport/gdb_obstack.h"
- #include "gdbarch.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 *this_frame, void **this_cache)
- {
- return get_frame_base (this_frame); /* sigh! */
- }
- static CORE_ADDR
- default_frame_locals_address (struct frame_info *this_frame, void **this_cache)
- {
- return default_frame_base_address (this_frame, this_cache);
- }
- static CORE_ADDR
- default_frame_args_address (struct frame_info *this_frame, void **this_cache)
- {
- return default_frame_base_address (this_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_entry
- {
- frame_base_sniffer_ftype *sniffer;
- struct frame_base_table_entry *next;
- };
- struct frame_base_table
- {
- struct frame_base_table_entry *head;
- struct frame_base_table_entry **tail;
- const struct frame_base *default_base;
- };
- static void *
- frame_base_init (struct obstack *obstack)
- {
- struct frame_base_table *table
- = OBSTACK_ZALLOC (obstack, struct frame_base_table);
- table->tail = &table->head;
- table->default_base = &default_frame_base;
- return table;
- }
- void
- frame_base_append_sniffer (struct gdbarch *gdbarch,
- frame_base_sniffer_ftype *sniffer)
- {
- struct frame_base_table *table
- = (struct frame_base_table *) gdbarch_data (gdbarch, frame_base_data);
- (*table->tail)
- = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_base_table_entry);
- (*table->tail)->sniffer = sniffer;
- table->tail = &(*table->tail)->next;
- }
- void
- frame_base_set_default (struct gdbarch *gdbarch,
- const struct frame_base *default_base)
- {
- struct frame_base_table *table
- = (struct frame_base_table *) gdbarch_data (gdbarch, frame_base_data);
- table->default_base = default_base;
- }
- const struct frame_base *
- frame_base_find_by_frame (struct frame_info *this_frame)
- {
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- struct frame_base_table *table
- = (struct frame_base_table *) gdbarch_data (gdbarch, frame_base_data);
- struct frame_base_table_entry *entry;
- for (entry = table->head; entry != NULL; entry = entry->next)
- {
- const struct frame_base *desc = NULL;
- desc = entry->sniffer (this_frame);
- if (desc != NULL)
- return desc;
- }
- return table->default_base;
- }
- void _initialize_frame_base ();
- void
- _initialize_frame_base ()
- {
- frame_base_data = gdbarch_data_register_pre_init (frame_base_init);
- }
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