1 /* Target machine description for EST-300, for GDB, the GNU debugger.
2 Copyright 1994, 1995 Free Software Foundation, Inc.
3 Contributed by Steve Chamberlain @ Cygnus Support.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 /* GCC is probably the only compiler used on this configuration. So
23 get this right even if the code which detects gcc2_compiled. is
26 #define BELIEVE_PCC_PROMOTION 1
28 /* We have more complex, useful breakpoints on the target. */
29 #define DECR_PC_AFTER_BREAK 0
33 #include "m68k/tm-m68k.h"
36 #undef FRAME_CHAIN_VALID
38 /* Takes the current frame-struct pointer and returns the chain-pointer
39 to get to the calling frame.
41 If our current frame pointer is zero, we're at the top; else read out
42 the saved FP from memory pointed to by the current FP. */
44 #define FRAME_CHAIN(thisframe) \
45 ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
47 /* If the chain pointer is zero (either because the saved value fetched
48 by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
49 never fetched anything), we are at the top of the stack. */
51 #define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)