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- /* Builtin frame register, for GDB, the GNU debugger.
- Copyright (C) 2002-2022 Free Software Foundation, Inc.
- Contributed by Red Hat.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "user-regs.h"
- #include "frame.h"
- #include "gdbtypes.h"
- #include "value.h"
- #include "gdbarch.h"
- static struct value *
- value_of_builtin_frame_fp_reg (struct frame_info *frame, const void *baton)
- {
- struct gdbarch *gdbarch = get_frame_arch (frame);
- if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0)
- /* NOTE: cagney/2003-04-24: Since the mere presence of "fp" in the
- register name table overrides this built-in $fp register, there
- is no real reason for this gdbarch_deprecated_fp_regnum trickery here.
- An architecture wanting to implement "$fp" as alias for a raw
- register can do so by adding "fp" to register name table (mind
- you, doing this is probably a dangerous thing). */
- return value_of_register (gdbarch_deprecated_fp_regnum (gdbarch),
- frame);
- else
- {
- struct type *data_ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
- struct value *val = allocate_value (data_ptr_type);
- gdb_byte *buf = value_contents_raw (val).data ();
- gdbarch_address_to_pointer (gdbarch, data_ptr_type,
- buf, get_frame_base_address (frame));
- return val;
- }
- }
- static struct value *
- value_of_builtin_frame_pc_reg (struct frame_info *frame, const void *baton)
- {
- struct gdbarch *gdbarch = get_frame_arch (frame);
- if (gdbarch_pc_regnum (gdbarch) >= 0)
- return value_of_register (gdbarch_pc_regnum (gdbarch), frame);
- else
- {
- struct type *func_ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
- struct value *val = allocate_value (func_ptr_type);
- gdb_byte *buf = value_contents_raw (val).data ();
- gdbarch_address_to_pointer (gdbarch, func_ptr_type,
- buf, get_frame_pc (frame));
- return val;
- }
- }
- static struct value *
- value_of_builtin_frame_sp_reg (struct frame_info *frame, const void *baton)
- {
- struct gdbarch *gdbarch = get_frame_arch (frame);
- if (gdbarch_sp_regnum (gdbarch) >= 0)
- return value_of_register (gdbarch_sp_regnum (gdbarch), frame);
- error (_("Standard register ``$sp'' is not available for this target"));
- }
- static struct value *
- value_of_builtin_frame_ps_reg (struct frame_info *frame, const void *baton)
- {
- struct gdbarch *gdbarch = get_frame_arch (frame);
- if (gdbarch_ps_regnum (gdbarch) >= 0)
- return value_of_register (gdbarch_ps_regnum (gdbarch), frame);
- error (_("Standard register ``$ps'' is not available for this target"));
- }
- void _initialize_frame_reg ();
- void
- _initialize_frame_reg ()
- {
- /* Frame based $fp, $pc, $sp and $ps. These only come into play
- when the target does not define its own version of these
- registers. */
- user_reg_add_builtin ("fp", value_of_builtin_frame_fp_reg, NULL);
- user_reg_add_builtin ("pc", value_of_builtin_frame_pc_reg, NULL);
- user_reg_add_builtin ("sp", value_of_builtin_frame_sp_reg, NULL);
- user_reg_add_builtin ("ps", value_of_builtin_frame_ps_reg, NULL);
- }
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