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78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/* Builtin registers, 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 "gdbtypes.h"
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#include "gdb_string.h"
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#include "gdb_assert.h"
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/* Implement builtin register types. Builtin registers have regnum's
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that live above of the range [0 .. NUM_REGS + NUM_PSEUDO_REGS)
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(which is controlled by the target). The target should never see a
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builtin register's regnum value. */
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/* An array of builtin registers. Always append, never delete. By
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doing this, the relative regnum (offset from NUM_REGS +
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NUM_PSEUDO_REGS) assigned to each builtin register never changes. */
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struct builtin_reg
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{
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const char *name;
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struct value *(*value) (struct frame_info * frame);
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};
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static struct builtin_reg *builtin_regs;
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int nr_builtin_regs;
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void
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add_builtin_reg (const char *name, struct value *(*value) (struct frame_info * frame))
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{
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nr_builtin_regs++;
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builtin_regs = xrealloc (builtin_regs,
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nr_builtin_regs * sizeof (builtin_regs[0]));
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builtin_regs[nr_builtin_regs - 1].name = name;
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builtin_regs[nr_builtin_regs - 1].value = value;
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}
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int
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builtin_reg_map_name_to_regnum (const char *name, int len)
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{
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int reg;
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for (reg = 0; reg < nr_builtin_regs; reg++)
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{
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if (len == strlen (builtin_regs[reg].name)
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&& strncmp (builtin_regs[reg].name, name, len) == 0)
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return NUM_REGS + NUM_PSEUDO_REGS + reg;
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}
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return -1;
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}
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struct value *
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value_of_builtin_reg (int regnum, struct frame_info *frame)
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{
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int reg = regnum - (NUM_REGS + NUM_PSEUDO_REGS);
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gdb_assert (reg >= 0 && reg < nr_builtin_regs);
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return builtin_regs[reg].value (frame);
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}
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