1/* Definitions for frame address handler, for GDB, the GNU debugger. 2 3 Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20#include "defs.h" 21#include "frame-base.h" 22#include "frame.h" 23#include "gdb_obstack.h" 24 25/* A default frame base implementations. If it wasn't for the old 26 DEPRECATED_FRAME_LOCALS_ADDRESS and DEPRECATED_FRAME_ARGS_ADDRESS, 27 these could be combined into a single function. All architectures 28 really need to override this. */ 29 30static CORE_ADDR 31default_frame_base_address (struct frame_info *next_frame, void **this_cache) 32{ 33 struct frame_info *this_frame = get_prev_frame (next_frame); 34 return get_frame_base (this_frame); /* sigh! */ 35} 36 37static CORE_ADDR 38default_frame_locals_address (struct frame_info *next_frame, void **this_cache) 39{ 40 return default_frame_base_address (next_frame, this_cache); 41} 42 43static CORE_ADDR 44default_frame_args_address (struct frame_info *next_frame, void **this_cache) 45{ 46 return default_frame_base_address (next_frame, this_cache); 47} 48 49const struct frame_base default_frame_base = { 50 NULL, /* No parent. */ 51 default_frame_base_address, 52 default_frame_locals_address, 53 default_frame_args_address 54}; 55 56static struct gdbarch_data *frame_base_data; 57 58struct frame_base_table_entry 59{ 60 frame_base_sniffer_ftype *sniffer; 61 struct frame_base_table_entry *next; 62}; 63 64struct frame_base_table 65{ 66 struct frame_base_table_entry *head; 67 struct frame_base_table_entry **tail; 68 const struct frame_base *default_base; 69}; 70 71static void * 72frame_base_init (struct obstack *obstack) 73{ 74 struct frame_base_table *table 75 = OBSTACK_ZALLOC (obstack, struct frame_base_table); 76 table->tail = &table->head; 77 table->default_base = &default_frame_base; 78 return table; 79} 80 81void 82frame_base_append_sniffer (struct gdbarch *gdbarch, 83 frame_base_sniffer_ftype *sniffer) 84{ 85 struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data); 86 (*table->tail) = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_base_table_entry); 87 (*table->tail)->sniffer = sniffer; 88 table->tail = &(*table->tail)->next; 89} 90 91void 92frame_base_set_default (struct gdbarch *gdbarch, 93 const struct frame_base *default_base) 94{ 95 struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data); 96 table->default_base = default_base; 97} 98 99const struct frame_base * 100frame_base_find_by_frame (struct frame_info *next_frame) 101{ 102 struct gdbarch *gdbarch = get_frame_arch (next_frame); 103 struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data); 104 struct frame_base_table_entry *entry; 105 106 for (entry = table->head; entry != NULL; entry = entry->next) 107 { 108 const struct frame_base *desc = NULL; 109 desc = entry->sniffer (next_frame); 110 if (desc != NULL) 111 return desc; 112 } 113 return table->default_base; 114} 115 116extern initialize_file_ftype _initialize_frame_base; /* -Wmissing-prototypes */ 117 118void 119_initialize_frame_base (void) 120{ 121 frame_base_data = gdbarch_data_register_pre_init (frame_base_init); 122} 123