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[/] [or1k/] [trunk/] [gdb-5.3/] [gdb/] [std-regs.c] - Rev 1773
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/* Builtin frame register, for GDB, the GNU debugger. Copyright 2002 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 2 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "defs.h" #include "builtin-regs.h" #include "frame.h" #include "gdbtypes.h" #include "value.h" #include "gdb_string.h" /* Types that describe the various builtin registers. */ static struct type *builtin_type_frame_reg; /* Constructors for those types. */ static void build_builtin_type_frame_reg (void) { /* $frame. */ if (builtin_type_frame_reg == NULL) { #if 0 struct frame { void *base; }; #endif builtin_type_frame_reg = init_composite_type ("frame", TYPE_CODE_STRUCT); append_composite_type_field (builtin_type_frame_reg, "base", builtin_type_void_data_ptr); } } static struct value * value_of_builtin_frame_reg (struct frame_info *frame) { struct value *val; char *buf; build_builtin_type_frame_reg (); val = allocate_value (builtin_type_frame_reg); VALUE_LVAL (val) = not_lval; buf = VALUE_CONTENTS_RAW (val); memset (buf, TYPE_LENGTH (VALUE_TYPE (val)), 0); /* frame.base. */ if (frame != NULL) ADDRESS_TO_POINTER (builtin_type_void_data_ptr, buf, frame->frame); buf += TYPE_LENGTH (builtin_type_void_data_ptr); /* frame.XXX. */ return val; } static struct value * value_of_builtin_frame_fp_reg (struct frame_info *frame) { #ifdef FP_REGNUM if (FP_REGNUM >= 0) return value_of_register (FP_REGNUM, frame); #endif { struct value *val = allocate_value (builtin_type_void_data_ptr); char *buf = VALUE_CONTENTS_RAW (val); if (frame == NULL) memset (buf, TYPE_LENGTH (VALUE_TYPE (val)), 0); else ADDRESS_TO_POINTER (builtin_type_void_data_ptr, buf, frame->frame); return val; } } static struct value * value_of_builtin_frame_pc_reg (struct frame_info *frame) { #ifdef PC_REGNUM if (PC_REGNUM >= 0) return value_of_register (PC_REGNUM, frame); #endif { struct value *val = allocate_value (builtin_type_void_data_ptr); char *buf = VALUE_CONTENTS_RAW (val); if (frame == NULL) memset (buf, TYPE_LENGTH (VALUE_TYPE (val)), 0); else ADDRESS_TO_POINTER (builtin_type_void_data_ptr, buf, frame->pc); return val; } } static struct value * value_of_builtin_frame_sp_reg (struct frame_info *frame) { #ifdef SP_REGNUM if (SP_REGNUM >= 0) return value_of_register (SP_REGNUM, frame); #endif error ("Standard register ``$sp'' is not available for this target"); } static struct value * value_of_builtin_frame_ps_reg (struct frame_info *frame) { #ifdef PS_REGNUM if (PS_REGNUM >= 0) return value_of_register (PS_REGNUM, frame); #endif error ("Standard register ``$ps'' is not available for this target"); } void _initialize_frame_reg (void) { /* FIXME: cagney/2002-02-08: At present the local builtin types can't be initialized using _initialize*() or gdbarch. Due mainly to non-multi-arch targets, GDB initializes things piece meal and, as a consequence can leave these types NULL. */ REGISTER_GDBARCH_SWAP (builtin_type_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. */ add_builtin_reg ("fp", value_of_builtin_frame_fp_reg); add_builtin_reg ("pc", value_of_builtin_frame_pc_reg); add_builtin_reg ("sp", value_of_builtin_frame_sp_reg); add_builtin_reg ("ps", value_of_builtin_frame_ps_reg); /* NOTE: cagney/2002-04-05: For moment leave the $frame / $gdbframe / $gdb.frame disabled. It isn't yet clear which of the many options is the best. */ if (0) add_builtin_reg ("frame", value_of_builtin_frame_reg); }
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