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 3 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, see <http://www.gnu.org/licenses/>. */
23 #include "user-regs.h"
27 #include "gdb_string.h"
31 value_of_builtin_frame_fp_reg (struct frame_info
*frame
, const void *baton
)
33 if (gdbarch_deprecated_fp_regnum (current_gdbarch
) >= 0)
34 /* NOTE: cagney/2003-04-24: Since the mere presence of "fp" in the
35 register name table overrides this built-in $fp register, there
36 is no real reason for this gdbarch_deprecated_fp_regnum trickery here.
37 An architecture wanting to implement "$fp" as alias for a raw
38 register can do so by adding "fp" to register name table (mind
39 you, doing this is probably a dangerous thing). */
40 return value_of_register (gdbarch_deprecated_fp_regnum (current_gdbarch
),
44 struct value
*val
= allocate_value (builtin_type_void_data_ptr
);
45 gdb_byte
*buf
= value_contents_raw (val
);
47 memset (buf
, 0, TYPE_LENGTH (value_type (val
)));
49 gdbarch_address_to_pointer (current_gdbarch
, builtin_type_void_data_ptr
,
50 buf
, get_frame_base_address (frame
));
56 value_of_builtin_frame_pc_reg (struct frame_info
*frame
, const void *baton
)
58 if (gdbarch_pc_regnum (current_gdbarch
) >= 0)
59 return value_of_register (gdbarch_pc_regnum (current_gdbarch
), frame
);
62 struct value
*val
= allocate_value (builtin_type_void_data_ptr
);
63 gdb_byte
*buf
= value_contents_raw (val
);
65 memset (buf
, 0, TYPE_LENGTH (value_type (val
)));
67 gdbarch_address_to_pointer (current_gdbarch
, builtin_type_void_data_ptr
,
68 buf
, get_frame_pc (frame
));
74 value_of_builtin_frame_sp_reg (struct frame_info
*frame
, const void *baton
)
76 if (gdbarch_sp_regnum (current_gdbarch
) >= 0)
77 return value_of_register (gdbarch_sp_regnum (current_gdbarch
), frame
);
78 error (_("Standard register ``$sp'' is not available for this target"));
82 value_of_builtin_frame_ps_reg (struct frame_info
*frame
, const void *baton
)
84 if (gdbarch_ps_regnum (current_gdbarch
) >= 0)
85 return value_of_register (gdbarch_ps_regnum (current_gdbarch
), frame
);
86 error (_("Standard register ``$ps'' is not available for this target"));
89 extern initialize_file_ftype _initialize_frame_reg
; /* -Wmissing-prototypes */
92 _initialize_frame_reg (void)
94 /* Frame based $fp, $pc, $sp and $ps. These only come into play
95 when the target does not define its own version of these
97 user_reg_add_builtin ("fp", value_of_builtin_frame_fp_reg
, NULL
);
98 user_reg_add_builtin ("pc", value_of_builtin_frame_pc_reg
, NULL
);
99 user_reg_add_builtin ("sp", value_of_builtin_frame_sp_reg
, NULL
);
100 user_reg_add_builtin ("ps", value_of_builtin_frame_ps_reg
, NULL
);