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 && legacy_frame_p (gdbarch))
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);