* config/m68k/tm-m68k.h (REGISTER_BYTE, REGISTER_RAW_SIZE)

(REGISTER_VIRTUAL_SIZE, MAX_REGISTER_RAW_SIZE)
(REGISTER_VIRTUAL_TYPE, REGISTER_NAMES, TARGET_LONG_DOUBLE_FORMAT)
(FUNCTION_START_OFFSET, SKIP_PROLOGUE, SAVED_PC_AFTER_CALL)
(INNER_THAN, STACK_ALIGN, REGISTER_SIZE): Remove macros.

* m68k-tdep.c: Include arch-utils.h
(m68k_register_raw_size): Add.
(m68k_register_virtual_size): Add.
(m68k_register_virtual_type): Add.
(m68k_register_name): Add.
(m68k_stack_align): Add.
(m68k_register_byte): Add.
(m68k_gdbarch_init): Add set_gdbarch calls for macros removed in
tm-m68k.h.

gdb/m68k-tdep.c

@@ -27,6 +27,7 @@
 #include "gdb_string.h"
 #include "inferior.h"
 #include "regcache.h"
+#include "arch-utils.h"
 
 
 #define P_LINKL_FP	0x480e
@@ -43,6 +44,92 @@
 
 void m68k_frame_init_saved_regs (struct frame_info *frame_info);
 
+/* Number of bytes of storage in the actual machine representation
+   for register regnum.  On the 68000, all regs are 4 bytes
+   except the floating point regs which are 12 bytes.  */
+/* Note that the unsigned cast here forces the result of the
+   subtraction to very high positive values if regnum < FP0_REGNUM */
+
+static int
+m68k_register_raw_size (int regnum)
+{
+  return (((unsigned) (regnum) - FP0_REGNUM) < 8 ? 12 : 4);
+}
+
+/* Number of bytes of storage in the program's representation
+   for register regnum.  On the 68000, all regs are 4 bytes
+   except the floating point regs which are 12-byte long doubles.  */
+
+static int
+m68k_register_virtual_size (int regnum)
+{
+  return (((unsigned) (regnum) - FP0_REGNUM) < 8 ? 12 : 4);
+}
+
+/* Return the GDB type object for the "standard" data type of data 
+   in register N.  This should be int for D0-D7, long double for FP0-FP7,
+   and void pointer for all others (A0-A7, PC, SR, FPCONTROL etc).
+   Note, for registers which contain addresses return pointer to void, 
+   not pointer to char, because we don't want to attempt to print 
+   the string after printing the address.  */
+
+static struct type *
+m68k_register_virtual_type (int regnum)
+{
+  if ((unsigned) regnum >= FPC_REGNUM)
+    return lookup_pointer_type (builtin_type_void);
+  else if ((unsigned) regnum >= FP0_REGNUM)
+    return builtin_type_long_double;
+  else if ((unsigned) regnum >= A0_REGNUM)
+    return lookup_pointer_type (builtin_type_void);
+  else
+    return builtin_type_int;
+}
+
+/* Function: m68k_register_name
+   Returns the name of the standard m68k register regnum. */
+
+static const char *
+m68k_register_name (int regnum)
+{
+  static char *register_names[] = {
+    "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
+    "a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp",
+    "ps", "pc",
+    "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7",
+    "fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags"
+  };
+
+  if (regnum < 0 ||
+      regnum >= sizeof (register_names) / sizeof (register_names[0]))
+    internal_error (__FILE__, __LINE__,
+		    "m68k_register_name: illegal register number %d", regnum);
+  else
+    return register_names[regnum];
+}
+
+/* Stack must be kept short aligned when doing function calls.  */
+
+static CORE_ADDR
+m68k_stack_align (CORE_ADDR addr)
+{
+  return ((addr + 1) & ~1);
+}
+
+/* Index within `registers' of the first byte of the space for
+   register regnum.  */
+
+static int
+m68k_register_byte (int regnum)
+{
+  if (regnum >= FPC_REGNUM)
+    return (((regnum - FPC_REGNUM) * 4) + 168);
+  else if (regnum >= FP0_REGNUM)
+    return (((regnum - FP0_REGNUM) * 12) + 72);
+  else
+    return (regnum * 4);
+}
+
 /* The only reason this is here is the tm-altos.h reference below.  It
    was moved back here from tm-m68k.h.  FIXME? */
 
@@ -731,6 +818,27 @@ m68k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 
   gdbarch = gdbarch_alloc (&info, 0);
 
+  set_gdbarch_long_double_format (gdbarch, &floatformat_m68881_ext);
+  set_gdbarch_long_double_bit (gdbarch, 96);
+
+  set_gdbarch_function_start_offset (gdbarch, 0);
+
+  set_gdbarch_skip_prologue (gdbarch, m68k_skip_prologue);
+  set_gdbarch_saved_pc_after_call (gdbarch, m68k_saved_pc_after_call);
+
+  /* Stack grows down. */
+  set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+  set_gdbarch_stack_align (gdbarch, m68k_stack_align);
+
+  set_gdbarch_register_raw_size (gdbarch, m68k_register_raw_size);
+  set_gdbarch_register_virtual_size (gdbarch, m68k_register_virtual_size);
+  set_gdbarch_max_register_raw_size (gdbarch, 12);
+  set_gdbarch_max_register_virtual_size (gdbarch, 12);
+  set_gdbarch_register_virtual_type (gdbarch, m68k_register_virtual_type);
+  set_gdbarch_register_name (gdbarch, m68k_register_name);
+  set_gdbarch_register_size (gdbarch, 4);
+  set_gdbarch_register_byte (gdbarch, m68k_register_byte);
+
   set_gdbarch_frame_init_saved_regs (gdbarch, m68k_frame_init_saved_regs);
 
   set_gdbarch_use_generic_dummy_frames (gdbarch, 0);