151 lines
4.3 KiB
C
151 lines
4.3 KiB
C
/* Builtin frame register, for GDB, the GNU debugger.
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Copyright 2002 Free Software Foundation, Inc.
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Contributed by Red Hat.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "builtin-regs.h"
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#include "frame.h"
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#include "gdbtypes.h"
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#include "value.h"
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/* Types that describe the various builtin registers. */
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static struct type *builtin_type_frame_reg;
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/* Constructors for those types. */
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static void
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build_builtin_type_frame_reg (void)
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{
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/* $frame. */
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if (builtin_type_frame_reg == NULL)
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{
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#if 0
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struct frame
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{
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void *base;
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};
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#endif
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builtin_type_frame_reg = init_composite_type ("frame", TYPE_CODE_STRUCT);
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append_composite_type_field (builtin_type_frame_reg, "base",
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builtin_type_void_data_ptr);
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}
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}
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static struct value *
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value_of_builtin_frame_reg (struct frame_info *frame)
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{
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struct value *val;
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char *buf;
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build_builtin_type_frame_reg ();
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val = allocate_value (builtin_type_frame_reg);
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VALUE_LVAL (val) = not_lval;
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buf = VALUE_CONTENTS_RAW (val);
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memset (buf, TYPE_LENGTH (VALUE_TYPE (val)), 0);
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/* frame.base. */
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if (frame != NULL)
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ADDRESS_TO_POINTER (builtin_type_void_data_ptr, buf, frame->frame);
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buf += TYPE_LENGTH (builtin_type_void_data_ptr);
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/* frame.XXX. */
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return val;
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}
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static struct value *
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value_of_builtin_frame_fp_reg (struct frame_info *frame)
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{
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#ifdef FP_REGNUM
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if (FP_REGNUM >= 0)
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return value_of_register (FP_REGNUM, frame);
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#endif
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{
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struct value *val = allocate_value (builtin_type_void_data_ptr);
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char *buf = VALUE_CONTENTS_RAW (val);
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if (frame == NULL)
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memset (buf, TYPE_LENGTH (VALUE_TYPE (val)), 0);
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else
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ADDRESS_TO_POINTER (builtin_type_void_data_ptr, buf, frame->frame);
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return val;
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}
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}
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static struct value *
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value_of_builtin_frame_pc_reg (struct frame_info *frame)
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{
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#ifdef PC_REGNUM
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if (PC_REGNUM >= 0)
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return value_of_register (PC_REGNUM, frame);
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#endif
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{
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struct value *val = allocate_value (builtin_type_void_data_ptr);
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char *buf = VALUE_CONTENTS_RAW (val);
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if (frame == NULL)
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memset (buf, TYPE_LENGTH (VALUE_TYPE (val)), 0);
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else
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ADDRESS_TO_POINTER (builtin_type_void_data_ptr, buf, frame->pc);
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return val;
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}
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}
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static struct value *
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value_of_builtin_frame_sp_reg (struct frame_info *frame)
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{
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#ifdef SP_REGNUM
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if (SP_REGNUM >= 0)
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return value_of_register (SP_REGNUM, frame);
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#endif
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error ("Standard register ``$sp'' is not available for this target");
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}
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static struct value *
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value_of_builtin_frame_ps_reg (struct frame_info *frame)
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{
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#ifdef PS_REGNUM
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if (PS_REGNUM >= 0)
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return value_of_register (PS_REGNUM, frame);
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#endif
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error ("Standard register ``$ps'' is not available for this target");
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}
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void
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_initialize_frame_reg (void)
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{
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/* FIXME: cagney/2002-02-08: At present the local builtin types
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can't be initialized using _initialize*() or gdbarch. Due mainly
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to non-multi-arch targets, GDB initializes things piece meal and,
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as a consequence can leave these types NULL. */
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REGISTER_GDBARCH_SWAP (builtin_type_frame_reg);
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/* Frame based $fp, $pc, $sp and $ps. These only come into play
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when the target does not define its own version of these
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registers. */
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add_builtin_reg ("fp", value_of_builtin_frame_fp_reg);
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add_builtin_reg ("pc", value_of_builtin_frame_pc_reg);
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add_builtin_reg ("sp", value_of_builtin_frame_sp_reg);
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add_builtin_reg ("ps", value_of_builtin_frame_ps_reg);
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/* NOTE: cagney/2002-04-05: For moment leave the $frame / $gdbframe
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/ $gdb.frame disabled. It isn't yet clear which of the many
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options is the best. */
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if (0)
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add_builtin_reg ("frame", value_of_builtin_frame_reg);
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}
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