1 files changed, 77 insertions, 0 deletions
diff --git a/gdb/builtin-regs.c b/gdb/builtin-regs.c
new file mode 100644
index 0000000..f9a6781
--- /dev/null
+++ b/gdb/builtin-regs.c
@@ -0,0 +1,77 @@
+/* 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);
+}