* gdbarch-utils.h, gdbarch-utils.c: New files.

* Makefile.in (SFILES, COMMON_OBS): Update.
(gdbarch_utils_h) Define.
(gdbarch-utils.o): Add dependencies.

* gdbarch.c, gdbarch.sh: Include "gdbarch-utils.h". Fix code
handling default method values.
(startup_gdbarch): Rename default_gdbarch, name misleading.
(breakpoint_from_pc): Default to legacy_breakpoint_from_pc.
(register_name): Default to legacy_register_name.
(call_dummy_words): Default to legacy_call_dummy_words.
(sizeof_call_dummy_words): Default to
legacy_sizeof_call_dummy_words.
(register_convertible): Default to
generic_register_convertible_not.
(breakpoint_from_pc): Default to legacy_breakpoint_from_pc.
(remote_translate_xfer_address): Default to
generic_remote_translate_xfer_address.
(frameless_function_invocation): Default to
generic_frameless_function_invocation_not.

gdb/gdbarch-utils.c

@@ -0,0 +1,137 @@
+/* Dynamic architecture support for GDB, the GNU debugger.
+   Copyright 1998-1999, Free Software Foundation, Inc.
+
+   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"
+
+#if GDB_MULTI_ARCH
+#include "gdbcmd.h"
+#include "inferior.h"		/* enum CALL_DUMMY_LOCATION et.al. */
+#else
+/* Just include everything in sight so that the every old definition
+   of macro is visible. */
+#include "gdb_string.h"
+#include <ctype.h>
+#include "symtab.h"
+#include "frame.h"
+#include "inferior.h"
+#include "breakpoint.h"
+#include "gdb_wait.h"
+#include "gdbcore.h"
+#include "gdbcmd.h"
+#include "target.h"
+#include "gdbthread.h"
+#include "annotate.h"
+#include "symfile.h"		/* for overlay functions */
+#endif
+
+/* Convenience macro for allocting typesafe memory. */
+
+#ifndef XMALLOC
+#define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
+#endif
+
+
+/* Use the program counter to determine the contents and size
+   of a breakpoint instruction.  If no target-dependent macro
+   BREAKPOINT_FROM_PC has been defined to implement this function,
+   assume that the breakpoint doesn't depend on the PC, and
+   use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
+   Return a pointer to a string of bytes that encode a breakpoint
+   instruction, stores the length of the string to *lenptr,
+   and optionally adjust the pc to point to the correct memory location
+   for inserting the breakpoint.  */
+
+unsigned char *
+legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
+{
+  /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a
+     breakpoint.  On some machines, breakpoints are handled by the
+     target environment and we don't have to worry about them here.  */
+#ifdef BIG_BREAKPOINT
+  if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+    {
+      static unsigned char big_break_insn[] = BIG_BREAKPOINT;
+      *lenptr = sizeof (big_break_insn);
+      return big_break_insn;
+    }
+#endif
+#ifdef LITTLE_BREAKPOINT
+  if (TARGET_BYTE_ORDER != BIG_ENDIAN)
+    {
+      static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
+      *lenptr = sizeof (little_break_insn);
+      return little_break_insn;
+    }
+#endif
+#ifdef BREAKPOINT
+  {
+    static unsigned char break_insn[] = BREAKPOINT;
+    *lenptr = sizeof (break_insn);
+    return break_insn;
+  }
+#endif
+  *lenptr = 0;
+  return NULL;
+}
+
+int
+generic_frameless_function_invocation_not (struct frame_info *fi)
+{
+  return 0;
+}
+
+char *
+legacy_register_name (int i)
+{
+#ifdef REGISTER_NAMES
+  static char *names[] = REGISTER_NAMES;
+  if (i < 0 || i >= (sizeof (names) / sizeof (*names)))
+    return NULL;
+  else
+    return names[i];
+#else
+  internal_error ("legacy_register_name: called.");
+  return NULL;
+#endif
+}
+
+#if defined (CALL_DUMMY)
+LONGEST legacy_call_dummy_words[] = CALL_DUMMY;
+#else
+LONGEST legacy_call_dummy_words[1];
+#endif
+int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words);
+
+void
+generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len,
+				       CORE_ADDR * rem_addr, int *rem_len)
+{
+  *rem_addr = gdb_addr;
+  *rem_len = gdb_len;
+}
+
+/* */
+
+extern initialize_file_ftype __initialize_gdbarch_utils;
+
+void
+__initialize_gdbarch_utils (void)
+{
+}