| /* 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); |
| } |