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