1 /* Builtin frame register, for GDB, the GNU debugger.
3 Copyright (C) 2002, 2005, 2007 Free Software Foundation, Inc.
5 Contributed by Red Hat.
7 This file is part of GDB.
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 2 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
25 #include "user-regs.h"
29 #include "gdb_string.h"
33 value_of_builtin_frame_fp_reg (struct frame_info *frame, const void *baton)
35 if (gdbarch_deprecated_fp_regnum (current_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 (current_gdbarch),
46 struct value *val = allocate_value (builtin_type_void_data_ptr);
47 gdb_byte *buf = value_contents_raw (val);
49 memset (buf, 0, TYPE_LENGTH (value_type (val)));
51 gdbarch_address_to_pointer (current_gdbarch, builtin_type_void_data_ptr,
52 buf, get_frame_base_address (frame));
58 value_of_builtin_frame_pc_reg (struct frame_info *frame, const void *baton)
60 if (gdbarch_pc_regnum (current_gdbarch) >= 0)
61 return value_of_register (gdbarch_pc_regnum (current_gdbarch), frame);
64 struct value *val = allocate_value (builtin_type_void_data_ptr);
65 gdb_byte *buf = value_contents_raw (val);
67 memset (buf, 0, TYPE_LENGTH (value_type (val)));
69 gdbarch_address_to_pointer (current_gdbarch, builtin_type_void_data_ptr,
70 buf, get_frame_pc (frame));
76 value_of_builtin_frame_sp_reg (struct frame_info *frame, const void *baton)
78 if (gdbarch_sp_regnum (current_gdbarch) >= 0)
79 return value_of_register (gdbarch_sp_regnum (current_gdbarch), frame);
80 error (_("Standard register ``$sp'' is not available for this target"));
84 value_of_builtin_frame_ps_reg (struct frame_info *frame, const void *baton)
86 if (gdbarch_ps_regnum (current_gdbarch) >= 0)
87 return value_of_register (gdbarch_ps_regnum (current_gdbarch), frame);
88 error (_("Standard register ``$ps'' is not available for this target"));
91 extern initialize_file_ftype _initialize_frame_reg; /* -Wmissing-prototypes */
94 _initialize_frame_reg (void)
96 /* Frame based $fp, $pc, $sp and $ps. These only come into play
97 when the target does not define its own version of these
99 user_reg_add_builtin ("fp", value_of_builtin_frame_fp_reg, NULL);
100 user_reg_add_builtin ("pc", value_of_builtin_frame_pc_reg, NULL);
101 user_reg_add_builtin ("sp", value_of_builtin_frame_sp_reg, NULL);
102 user_reg_add_builtin ("ps", value_of_builtin_frame_ps_reg, NULL);