1 /* Definitions for frame address handler, for GDB, the GNU debugger.
3 Copyright 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GDB.
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 2 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "frame-base.h"
25 #include "gdb_obstack.h"
27 /* A default frame base implementations. If it wasn't for the old
28 DEPRECATED_FRAME_LOCALS_ADDRESS and DEPRECATED_FRAME_ARGS_ADDRESS,
29 these could be combined into a single function. All architectures
30 really need to override this. */
33 default_frame_base_address (struct frame_info
*next_frame
, void **this_cache
)
35 struct frame_info
*this_frame
= get_prev_frame (next_frame
);
36 return get_frame_base (this_frame
); /* sigh! */
40 default_frame_locals_address (struct frame_info
*next_frame
, void **this_cache
)
42 if (DEPRECATED_FRAME_LOCALS_ADDRESS_P ())
44 /* This is bad. The computation of per-frame locals address
45 should use a per-frame frame-base. */
46 struct frame_info
*this_frame
= get_prev_frame (next_frame
);
47 return DEPRECATED_FRAME_LOCALS_ADDRESS (this_frame
);
49 return default_frame_base_address (next_frame
, this_cache
);
53 default_frame_args_address (struct frame_info
*next_frame
, void **this_cache
)
55 if (DEPRECATED_FRAME_ARGS_ADDRESS_P ())
57 struct frame_info
*this_frame
= get_prev_frame (next_frame
);
58 return DEPRECATED_FRAME_ARGS_ADDRESS (this_frame
);
60 return default_frame_base_address (next_frame
, this_cache
);
63 const struct frame_base default_frame_base
= {
64 NULL
, /* No parent. */
65 default_frame_base_address
,
66 default_frame_locals_address
,
67 default_frame_args_address
70 static struct gdbarch_data
*frame_base_data
;
72 struct frame_base_table_entry
74 frame_base_sniffer_ftype
*sniffer
;
75 struct frame_base_table_entry
*next
;
78 struct frame_base_table
80 struct frame_base_table_entry
*head
;
81 struct frame_base_table_entry
**tail
;
82 const struct frame_base
*default_base
;
86 frame_base_init (struct obstack
*obstack
)
88 struct frame_base_table
*table
89 = OBSTACK_ZALLOC (obstack
, struct frame_base_table
);
90 table
->tail
= &table
->head
;
91 table
->default_base
= &default_frame_base
;
96 frame_base_append_sniffer (struct gdbarch
*gdbarch
,
97 frame_base_sniffer_ftype
*sniffer
)
99 struct frame_base_table
*table
= gdbarch_data (gdbarch
, frame_base_data
);
100 (*table
->tail
) = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct frame_base_table_entry
);
101 (*table
->tail
)->sniffer
= sniffer
;
102 table
->tail
= &(*table
->tail
)->next
;
106 frame_base_set_default (struct gdbarch
*gdbarch
,
107 const struct frame_base
*default_base
)
109 struct frame_base_table
*table
= gdbarch_data (gdbarch
, frame_base_data
);
110 table
->default_base
= default_base
;
113 const struct frame_base
*
114 frame_base_find_by_frame (struct frame_info
*next_frame
)
116 struct gdbarch
*gdbarch
= get_frame_arch (next_frame
);
117 struct frame_base_table
*table
= gdbarch_data (gdbarch
, frame_base_data
);
118 struct frame_base_table_entry
*entry
;
120 for (entry
= table
->head
; entry
!= NULL
; entry
= entry
->next
)
122 const struct frame_base
*desc
= NULL
;
123 desc
= entry
->sniffer (next_frame
);
127 return table
->default_base
;
130 extern initialize_file_ftype _initialize_frame_base
; /* -Wmissing-prototypes */
133 _initialize_frame_base (void)
135 frame_base_data
= gdbarch_data_register_pre_init (frame_base_init
);