1 /* Definitions for frame unwinder, 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. */
24 #include "frame-unwind.h"
25 #include "gdb_assert.h"
26 #include "dummy-frame.h"
28 static struct gdbarch_data
*frame_unwind_data
;
30 struct frame_unwind_table
32 frame_unwind_sniffer_ftype
**sniffer
;
36 /* Append a predicate to the end of the table. */
38 append_predicate (struct frame_unwind_table
*table
,
39 frame_unwind_sniffer_ftype
*sniffer
)
41 table
->sniffer
= xrealloc (table
->sniffer
, ((table
->nr
+ 1)
42 * sizeof (frame_unwind_sniffer_ftype
*)));
43 table
->sniffer
[table
->nr
] = sniffer
;
48 frame_unwind_init (struct gdbarch
*gdbarch
)
50 struct frame_unwind_table
*table
= XCALLOC (1, struct frame_unwind_table
);
51 append_predicate (table
, dummy_frame_sniffer
);
56 frame_unwind_append_sniffer (struct gdbarch
*gdbarch
,
57 frame_unwind_sniffer_ftype
*sniffer
)
59 struct frame_unwind_table
*table
=
60 gdbarch_data (gdbarch
, frame_unwind_data
);
63 /* ULGH, called during architecture initialization. Patch
65 table
= frame_unwind_init (gdbarch
);
66 set_gdbarch_data (gdbarch
, frame_unwind_data
, table
);
68 append_predicate (table
, sniffer
);
71 const struct frame_unwind
*
72 frame_unwind_find_by_frame (struct frame_info
*next_frame
)
75 struct gdbarch
*gdbarch
= get_frame_arch (next_frame
);
76 struct frame_unwind_table
*table
= gdbarch_data (gdbarch
, frame_unwind_data
);
77 if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
)
78 /* Seriously old code. Don't even try to use this new mechanism.
79 (Note: The variable USE_GENERIC_DUMMY_FRAMES is deprecated, not
80 the dummy frame mechanism. All architectures should be using
81 generic dummy frames). */
82 return legacy_saved_regs_unwind
;
83 for (i
= 0; i
< table
->nr
; i
++)
85 const struct frame_unwind
*desc
;
86 desc
= table
->sniffer
[i
] (next_frame
);
90 return legacy_saved_regs_unwind
;
93 extern initialize_file_ftype _initialize_frame_unwind
; /* -Wmissing-prototypes */
96 _initialize_frame_unwind (void)
98 frame_unwind_data
= register_gdbarch_data (frame_unwind_init
);