Now handles multiple hosts and targets.
[deliverable/binutils-gdb.git] / gdb / tm-vx68.h
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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.
4
5This file is part of GDB.
6
7GDB is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 1, or (at your option)
10any later version.
11
12GDB is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GDB; see the file COPYING. If not, write to
19the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20
21#define GDBINIT_FILENAME ".vxgdbinit"
22
23#define DEFAULT_PROMPT "(vxgdb) "
24
25/* Kludge... */
26#include "tm-sun3.h"
27
28/* We have more complex, useful breakpoints on the target. */
29#undef DECR_PC_AFTER_BREAK
30#define DECR_PC_AFTER_BREAK 0
31
32/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
33#undef FRAME_CHAIN
34#undef FRAME_CHAIN_VALID
35
36/* Takes the current frame-struct pointer and returns the chain-pointer
37 to get to the calling frame.
38
39 If our current frame pointer is zero, we're at the top; else read out
40 the saved FP from memory pointed to by the current FP. */
41
42#define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
43
44/* If the chain pointer is zero (either because the saved value fetched
45 by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
46 never fetched anything), we are at the top of the stack. */
47
48#define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)
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