1 /* Definitions for frame address handler, for GDB, the GNU debugger.
3 Copyright 2003 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"
26 /* A default frame base implementations. If it wasn't for the old
27 DEPRECATED_FRAME_LOCALS_ADDRESS and DEPRECATED_FRAME_ARGS_ADDRESS,
28 these could be combined into a single function. All architectures
29 really need to override this. */
32 default_frame_base_address (struct frame_info
*next_frame
, void **this_cache
)
34 struct frame_info
*this_frame
= get_prev_frame (next_frame
);
35 return get_frame_base (this_frame
); /* sigh! */
39 default_frame_locals_address (struct frame_info
*next_frame
, void **this_cache
)
41 if (DEPRECATED_FRAME_LOCALS_ADDRESS_P ())
43 /* This is bad. The computation of per-frame locals address
44 should use a per-frame frame-base. */
45 struct frame_info
*this_frame
= get_prev_frame (next_frame
);
46 return DEPRECATED_FRAME_LOCALS_ADDRESS (this_frame
);
48 return default_frame_base_address (next_frame
, this_cache
);
52 default_frame_args_address (struct frame_info
*next_frame
, void **this_cache
)
54 if (DEPRECATED_FRAME_ARGS_ADDRESS_P ())
56 struct frame_info
*this_frame
= get_prev_frame (next_frame
);
57 return DEPRECATED_FRAME_ARGS_ADDRESS (this_frame
);
59 return default_frame_base_address (next_frame
, this_cache
);
62 const struct frame_base default_frame_base
= {
63 NULL
, /* No parent. */
64 default_frame_base_address
,
65 default_frame_locals_address
,
66 default_frame_args_address
69 static struct gdbarch_data
*frame_base_data
;
71 struct frame_base_table
73 frame_base_sniffer_ftype
**sniffer
;
74 const struct frame_base
*default_base
;
79 frame_base_init (struct gdbarch
*gdbarch
)
81 struct frame_base_table
*table
= XCALLOC (1, struct frame_base_table
);
82 table
->default_base
= &default_frame_base
;
86 static struct frame_base_table
*
87 frame_base_table (struct gdbarch
*gdbarch
)
89 struct frame_base_table
*table
= gdbarch_data (gdbarch
, frame_base_data
);
92 /* ULGH, called during architecture initialization. Patch
94 table
= frame_base_init (gdbarch
);
95 set_gdbarch_data (gdbarch
, frame_base_data
, table
);
100 /* Append a predicate to the end of the table. */
102 append_predicate (struct frame_base_table
*table
,
103 frame_base_sniffer_ftype
*sniffer
)
105 table
->sniffer
= xrealloc (table
->sniffer
,
107 * sizeof (frame_base_sniffer_ftype
*)));
108 table
->sniffer
[table
->nr
] = sniffer
;
113 frame_base_append_sniffer (struct gdbarch
*gdbarch
,
114 frame_base_sniffer_ftype
*sniffer
)
116 struct frame_base_table
*table
= frame_base_table (gdbarch
);
117 append_predicate (table
, sniffer
);
121 frame_base_set_default (struct gdbarch
*gdbarch
,
122 const struct frame_base
*default_base
)
124 struct frame_base_table
*table
= frame_base_table (gdbarch
);
125 table
->default_base
= default_base
;
128 const struct frame_base
*
129 frame_base_find_by_frame (struct frame_info
*next_frame
)
131 struct gdbarch
*gdbarch
= get_frame_arch (next_frame
);
132 struct frame_base_table
*table
= frame_base_table (gdbarch
);
134 for (i
= 0; i
< table
->nr
; i
++)
136 const struct frame_base
*desc
= NULL
;
137 desc
= table
->sniffer
[i
] (next_frame
);
141 return table
->default_base
;
144 extern initialize_file_ftype _initialize_frame_base
; /* -Wmissing-prototypes */
147 _initialize_frame_base (void)
149 frame_base_data
= register_gdbarch_data (frame_base_init
);