/* Target machine description for EST-300, for GDB, the GNU debugger.
   Copyright 1994 Free Software Foundation, Inc.
   Contributed by Steve Chamberlain @ Cygnus Support.

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */


#define	DEFAULT_PROMPT		"(estgdb) "

/* GCC is probably the only compiler used on this configuration.  So
   get this right even if the code which detects gcc2_compiled. is
   still broken.  */

#define BELIEVE_PCC_PROMOTION 1

/* We have more complex, useful breakpoints on the target.  */
#define	DECR_PC_AFTER_BREAK	0

#include "m68k/tm-m68k.h"

/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
#undef	FRAME_CHAIN
#undef	FRAME_CHAIN_VALID

/* Takes the current frame-struct pointer and returns the chain-pointer
   to get to the calling frame.

   If our current frame pointer is zero, we're at the top; else read out
   the saved FP from memory pointed to by the current FP.  */

#define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)

/* If the chain pointer is zero (either because the saved value fetched
   by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
   never fetched anything), we are at the top of the stack.  */

#define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)

/* FIXME, Longjmp information stolen from Sun-3 config.  Dunno if right.  */
/* Offsets (in target ints) into jmp_buf.  Not defined by Sun, but at least
   documented in a comment in <machine/setjmp.h>! */

#define JB_ELEMENT_SIZE 4

#define JB_ONSSTACK 0
#define JB_SIGMASK 1
#define JB_SP 2
#define JB_PC 3
#define JB_PSL 4
#define JB_D2 5
#define JB_D3 6
#define JB_D4 7
#define JB_D5 8
#define JB_D6 9
#define JB_D7 10
#define JB_A2 11
#define JB_A3 12
#define JB_A4 13
#define JB_A5 14
#define JB_A6 15