Upgrade GDB from 7.4.1 to 7.6.1 on the vendor branch
[dragonfly.git] / contrib / gdb-7 / gdb / std-regs.c
CommitLineData
5796c8dc
SS
1/* Builtin frame register, for GDB, the GNU debugger.
2
ef5ccd6c 3 Copyright (C) 2002-2013 Free Software Foundation, Inc.
5796c8dc
SS
4
5 Contributed by Red Hat.
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21
22#include "defs.h"
23#include "user-regs.h"
24#include "frame.h"
25#include "gdbtypes.h"
26#include "value.h"
27#include "gdb_string.h"
28
29
30static struct value *
31value_of_builtin_frame_fp_reg (struct frame_info *frame, const void *baton)
32{
33 struct gdbarch *gdbarch = get_frame_arch (frame);
cf7f2e2d 34
5796c8dc
SS
35 if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0)
36 /* NOTE: cagney/2003-04-24: Since the mere presence of "fp" in the
37 register name table overrides this built-in $fp register, there
38 is no real reason for this gdbarch_deprecated_fp_regnum trickery here.
39 An architecture wanting to implement "$fp" as alias for a raw
40 register can do so by adding "fp" to register name table (mind
41 you, doing this is probably a dangerous thing). */
42 return value_of_register (gdbarch_deprecated_fp_regnum (gdbarch),
43 frame);
44 else
45 {
46 struct type *data_ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
47 struct value *val = allocate_value (data_ptr_type);
48 gdb_byte *buf = value_contents_raw (val);
cf7f2e2d 49
c50c785c
JM
50 gdbarch_address_to_pointer (gdbarch, data_ptr_type,
51 buf, get_frame_base_address (frame));
5796c8dc
SS
52 return val;
53 }
54}
55
56static struct value *
57value_of_builtin_frame_pc_reg (struct frame_info *frame, const void *baton)
58{
59 struct gdbarch *gdbarch = get_frame_arch (frame);
cf7f2e2d 60
5796c8dc
SS
61 if (gdbarch_pc_regnum (gdbarch) >= 0)
62 return value_of_register (gdbarch_pc_regnum (gdbarch), frame);
63 else
64 {
65 struct type *func_ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
66 struct value *val = allocate_value (func_ptr_type);
67 gdb_byte *buf = value_contents_raw (val);
cf7f2e2d 68
c50c785c
JM
69 gdbarch_address_to_pointer (gdbarch, func_ptr_type,
70 buf, get_frame_pc (frame));
5796c8dc
SS
71 return val;
72 }
73}
74
75static struct value *
76value_of_builtin_frame_sp_reg (struct frame_info *frame, const void *baton)
77{
78 struct gdbarch *gdbarch = get_frame_arch (frame);
cf7f2e2d 79
5796c8dc
SS
80 if (gdbarch_sp_regnum (gdbarch) >= 0)
81 return value_of_register (gdbarch_sp_regnum (gdbarch), frame);
82 error (_("Standard register ``$sp'' is not available for this target"));
83}
84
85static struct value *
86value_of_builtin_frame_ps_reg (struct frame_info *frame, const void *baton)
87{
88 struct gdbarch *gdbarch = get_frame_arch (frame);
cf7f2e2d 89
5796c8dc
SS
90 if (gdbarch_ps_regnum (gdbarch) >= 0)
91 return value_of_register (gdbarch_ps_regnum (gdbarch), frame);
92 error (_("Standard register ``$ps'' is not available for this target"));
93}
94
95extern initialize_file_ftype _initialize_frame_reg; /* -Wmissing-prototypes */
96
97void
98_initialize_frame_reg (void)
99{
100 /* Frame based $fp, $pc, $sp and $ps. These only come into play
101 when the target does not define its own version of these
102 registers. */
103 user_reg_add_builtin ("fp", value_of_builtin_frame_fp_reg, NULL);
104 user_reg_add_builtin ("pc", value_of_builtin_frame_pc_reg, NULL);
105 user_reg_add_builtin ("sp", value_of_builtin_frame_sp_reg, NULL);
106 user_reg_add_builtin ("ps", value_of_builtin_frame_ps_reg, NULL);
107}