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_p_ftype **p;
37 /* Append a predicate to the end of the table. */
39 append_predicate (struct frame_unwind_table *table, frame_unwind_p_ftype *p)
41 table->p = xrealloc (table->p, ((table->nr + 1)
42 * sizeof (frame_unwind_p_ftype *)));
43 table->p[table->nr] = p;
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_p);
56 frame_unwind_free (struct gdbarch *gdbarch, void *data)
58 struct frame_unwind_table *table =
59 gdbarch_data (gdbarch, frame_unwind_data);
65 frame_unwind_append_predicate (struct gdbarch *gdbarch,
66 frame_unwind_p_ftype *p)
68 struct frame_unwind_table *table =
69 gdbarch_data (gdbarch, frame_unwind_data);
72 /* ULGH, called during architecture initialization. Patch
74 table = frame_unwind_init (gdbarch);
75 set_gdbarch_data (gdbarch, frame_unwind_data, table);
77 append_predicate (table, p);
80 const struct frame_unwind *
81 frame_unwind_find_by_pc (struct gdbarch *gdbarch, CORE_ADDR pc)
84 struct frame_unwind_table *table =
85 gdbarch_data (gdbarch, frame_unwind_data);
86 if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES)
87 /* Seriously old code. Don't even try to use this new mechanism.
88 (Note: The variable USE_GENERIC_DUMMY_FRAMES is deprecated, not
89 the dummy frame mechanism. All architectures should be using
90 generic dummy frames). */
91 return legacy_saved_regs_unwind;
92 for (i = 0; i < table->nr; i++)
94 const struct frame_unwind *desc = table->p[i] (pc);
98 return legacy_saved_regs_unwind;
101 extern initialize_file_ftype _initialize_frame_unwind; /* -Wmissing-prototypes */
104 _initialize_frame_unwind (void)
106 frame_unwind_data = register_gdbarch_data (frame_unwind_init,