1 /* Parameters for execution on VxWorks 68k's, for GDB, the GNU debugger.
2 Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
3 Contributed by 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 #define GDBINIT_FILENAME ".os68gdbinit"
23 #define DEFAULT_PROMPT "(os68k) "
27 /* We have more complex, useful breakpoints on the target. */
28 #undef DECR_PC_AFTER_BREAK
29 #define DECR_PC_AFTER_BREAK 0
31 /* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
33 #undef FRAME_CHAIN_VALID
35 /* Takes the current frame-struct pointer and returns the chain-pointer
36 to get to the calling frame.
38 If our current frame pointer is zero, we're at the top; else read out
39 the saved FP from memory pointed to by the current FP. */
41 #define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
43 /* If the chain pointer is zero (either because the saved value fetched
44 by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
45 never fetched anything), we are at the top of the stack. */
47 #define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)