| 1 |
24 |
jeremybenn |
/* Builtin frame register, for GDB, the GNU debugger.
|
| 2 |
|
|
|
| 3 |
|
|
Copyright (C) 2002, 2005, 2007, 2008 Free Software Foundation, Inc.
|
| 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 |
|
|
|
| 30 |
|
|
static struct value *
|
| 31 |
|
|
value_of_builtin_frame_fp_reg (struct frame_info *frame, const void *baton)
|
| 32 |
|
|
{
|
| 33 |
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
| 34 |
|
|
if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0)
|
| 35 |
|
|
/* NOTE: cagney/2003-04-24: Since the mere presence of "fp" in the
|
| 36 |
|
|
register name table overrides this built-in $fp register, there
|
| 37 |
|
|
is no real reason for this gdbarch_deprecated_fp_regnum trickery here.
|
| 38 |
|
|
An architecture wanting to implement "$fp" as alias for a raw
|
| 39 |
|
|
register can do so by adding "fp" to register name table (mind
|
| 40 |
|
|
you, doing this is probably a dangerous thing). */
|
| 41 |
|
|
return value_of_register (gdbarch_deprecated_fp_regnum (gdbarch),
|
| 42 |
|
|
frame);
|
| 43 |
|
|
else
|
| 44 |
|
|
{
|
| 45 |
|
|
struct value *val = allocate_value (builtin_type_void_data_ptr);
|
| 46 |
|
|
gdb_byte *buf = value_contents_raw (val);
|
| 47 |
|
|
if (frame == NULL)
|
| 48 |
|
|
memset (buf, 0, TYPE_LENGTH (value_type (val)));
|
| 49 |
|
|
else
|
| 50 |
|
|
gdbarch_address_to_pointer (gdbarch, builtin_type_void_data_ptr,
|
| 51 |
|
|
buf, get_frame_base_address (frame));
|
| 52 |
|
|
return val;
|
| 53 |
|
|
}
|
| 54 |
|
|
}
|
| 55 |
|
|
|
| 56 |
|
|
static struct value *
|
| 57 |
|
|
value_of_builtin_frame_pc_reg (struct frame_info *frame, const void *baton)
|
| 58 |
|
|
{
|
| 59 |
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
| 60 |
|
|
if (gdbarch_pc_regnum (gdbarch) >= 0)
|
| 61 |
|
|
return value_of_register (gdbarch_pc_regnum (gdbarch), frame);
|
| 62 |
|
|
else
|
| 63 |
|
|
{
|
| 64 |
|
|
struct value *val = allocate_value (builtin_type_void_func_ptr);
|
| 65 |
|
|
gdb_byte *buf = value_contents_raw (val);
|
| 66 |
|
|
if (frame == NULL)
|
| 67 |
|
|
memset (buf, 0, TYPE_LENGTH (value_type (val)));
|
| 68 |
|
|
else
|
| 69 |
|
|
gdbarch_address_to_pointer (gdbarch, builtin_type_void_func_ptr,
|
| 70 |
|
|
buf, get_frame_pc (frame));
|
| 71 |
|
|
return val;
|
| 72 |
|
|
}
|
| 73 |
|
|
}
|
| 74 |
|
|
|
| 75 |
|
|
static struct value *
|
| 76 |
|
|
value_of_builtin_frame_sp_reg (struct frame_info *frame, const void *baton)
|
| 77 |
|
|
{
|
| 78 |
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
| 79 |
|
|
if (gdbarch_sp_regnum (gdbarch) >= 0)
|
| 80 |
|
|
return value_of_register (gdbarch_sp_regnum (gdbarch), frame);
|
| 81 |
|
|
error (_("Standard register ``$sp'' is not available for this target"));
|
| 82 |
|
|
}
|
| 83 |
|
|
|
| 84 |
|
|
static struct value *
|
| 85 |
|
|
value_of_builtin_frame_ps_reg (struct frame_info *frame, const void *baton)
|
| 86 |
|
|
{
|
| 87 |
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
| 88 |
|
|
if (gdbarch_ps_regnum (gdbarch) >= 0)
|
| 89 |
|
|
return value_of_register (gdbarch_ps_regnum (gdbarch), frame);
|
| 90 |
|
|
error (_("Standard register ``$ps'' is not available for this target"));
|
| 91 |
|
|
}
|
| 92 |
|
|
|
| 93 |
|
|
extern initialize_file_ftype _initialize_frame_reg; /* -Wmissing-prototypes */
|
| 94 |
|
|
|
| 95 |
|
|
void
|
| 96 |
|
|
_initialize_frame_reg (void)
|
| 97 |
|
|
{
|
| 98 |
|
|
/* Frame based $fp, $pc, $sp and $ps. These only come into play
|
| 99 |
|
|
when the target does not define its own version of these
|
| 100 |
|
|
registers. */
|
| 101 |
|
|
user_reg_add_builtin ("fp", value_of_builtin_frame_fp_reg, NULL);
|
| 102 |
|
|
user_reg_add_builtin ("pc", value_of_builtin_frame_pc_reg, NULL);
|
| 103 |
|
|
user_reg_add_builtin ("sp", value_of_builtin_frame_sp_reg, NULL);
|
| 104 |
|
|
user_reg_add_builtin ("ps", value_of_builtin_frame_ps_reg, NULL);
|
| 105 |
|
|
}
|
