1 /* Builtin frame register, for GDB, the GNU debugger.
3 Copyright 2002 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., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
25 #include "builtin-regs.h"
30 /* Types that describe the various builtin registers. */
32 static struct type
*builtin_type_frame_reg
;
34 /* Constructors for those types. */
37 build_builtin_type_frame_reg (void)
40 if (builtin_type_frame_reg
== NULL
)
48 builtin_type_frame_reg
= init_composite_type ("frame", TYPE_CODE_STRUCT
);
49 append_composite_type_field (builtin_type_frame_reg
, "base",
50 builtin_type_void_data_ptr
);
55 value_of_builtin_frame_reg (struct frame_info
*frame
)
59 build_builtin_type_frame_reg ();
60 val
= allocate_value (builtin_type_frame_reg
);
61 VALUE_LVAL (val
) = not_lval
;
62 buf
= VALUE_CONTENTS_RAW (val
);
63 memset (buf
, TYPE_LENGTH (VALUE_TYPE (val
)), 0);
66 ADDRESS_TO_POINTER (builtin_type_void_data_ptr
, buf
, frame
->frame
);
67 buf
+= TYPE_LENGTH (builtin_type_void_data_ptr
);
73 value_of_builtin_frame_fp_reg (struct frame_info
*frame
)
77 return value_of_register (FP_REGNUM
, frame
);
80 struct value
*val
= allocate_value (builtin_type_void_data_ptr
);
81 char *buf
= VALUE_CONTENTS_RAW (val
);
83 memset (buf
, TYPE_LENGTH (VALUE_TYPE (val
)), 0);
85 ADDRESS_TO_POINTER (builtin_type_void_data_ptr
, buf
, frame
->frame
);
91 value_of_builtin_frame_pc_reg (struct frame_info
*frame
)
95 return value_of_register (PC_REGNUM
, frame
);
98 struct value
*val
= allocate_value (builtin_type_void_data_ptr
);
99 char *buf
= VALUE_CONTENTS_RAW (val
);
101 memset (buf
, TYPE_LENGTH (VALUE_TYPE (val
)), 0);
103 ADDRESS_TO_POINTER (builtin_type_void_data_ptr
, buf
, frame
->pc
);
108 static struct value
*
109 value_of_builtin_frame_sp_reg (struct frame_info
*frame
)
113 return value_of_register (SP_REGNUM
, frame
);
115 error ("Standard register ``$sp'' is not available for this target");
118 static struct value
*
119 value_of_builtin_frame_ps_reg (struct frame_info
*frame
)
123 return value_of_register (PS_REGNUM
, frame
);
125 error ("Standard register ``$ps'' is not available for this target");
129 _initialize_frame_reg (void)
131 /* FIXME: cagney/2002-02-08: At present the local builtin types
132 can't be initialized using _initialize*() or gdbarch. Due mainly
133 to non-multi-arch targets, GDB initializes things piece meal and,
134 as a consequence can leave these types NULL. */
135 REGISTER_GDBARCH_SWAP (builtin_type_frame_reg
);
137 /* Frame based $fp, $pc, $sp and $ps. These only come into play
138 when the target does not define its own version of these
140 add_builtin_reg ("fp", value_of_builtin_frame_fp_reg
);
141 add_builtin_reg ("pc", value_of_builtin_frame_pc_reg
);
142 add_builtin_reg ("sp", value_of_builtin_frame_sp_reg
);
143 add_builtin_reg ("ps", value_of_builtin_frame_ps_reg
);
145 /* NOTE: cagney/2002-04-05: For moment leave the $frame / $gdbframe
146 / $gdb.frame disabled. It isn't yet clear which of the many
147 options is the best. */
149 add_builtin_reg ("frame", value_of_builtin_frame_reg
);